Current Issue
Title- -Exploring the Radiant World of X-Rays in Medicine Date - 21-08-23
Author- Rahat Aaliya FR-01/11-A020
X-RAY
X-ray is a form of electromagnetic radiation. It is used to diagnose bone fractures and disorders, as well as to examine organs like the lungs, kidneys, ureter, bladder, etc. X-ray is a type of ionizing radiation.
Invention:
X-ray was invented by Wilhelm Conrad Roentgen (W.C. Roentgen) on November 8, 1895, in Germany. X-ray is also known as Roentgen Radiation, named after its inventor.
The first X-ray image obtained was of the hands of Wilhelm Roentgen's wife, taken on December 22, 1895.
Properties:
- X-rays are invisible.
- X-rays have no mass.
- X-rays travel at the speed of light in a vacuum.
- X-rays travel in straight lines.
- They have a very short wavelength.
- They can't be reflected.
Production:
- X-rays are produced when fast-moving electrons collide and interact with the target anode, resulting in sudden emission.
- More than 99% of the electron energy is converted into heat during this emission process, with less than 1% converted into X-rays.
About X-ray:
Various views are taken in general X-rays, such as:
- Anterior to posterior (A.P) view.
- Posterior to anterior (P.A) view.
- Lateral, oblique, OM, Y-projection, frog view, Zanca view, etc.
X-ray offers a variety of views.
Special procedures are performed in X-ray, such as:
- I.V.P, B.M.F.T, B.M, R.G.U, H.S.G, and cholangiogram, among others.
Patients undergo preparation before these special procedures, including contrast injection through veins.
Role of X-ray in the Medical Field:
- Helps confirm clinical diagnoses.
- Assists in studying the anatomy of fractures.
- Aids in studying the displacement of bones due to fractures.
- Detects cracks and stress fractures.
- Plays a role in medico-legal studies.
Name :- Rahat Aaliya
BVRMIT
5th semester
Title- -HEPATITIS Date - 27-06-23
Author- Rahat Aaliya FR-01/11-A019
HEPATITIS
Hepatitis is an inflammation of the liver. It may be caused by viral infections, alcohol consumption, several health conditions, or even some medications. Treatment varies based on the type and underlying cause.
Hepatitis refers to an inflammatory condition of the liver. It is commonly the result of a viral infection, but there are other possible causes of hepatitis. These include autoimmune hepatitis and hepatitis that occurs as a secondary result of medications, drugs, toxins, and alcohol. Autoimmune hepatitis is a disease that occurs when your body makes antibodies against your liver tissue.
Types of Hepatitis:
1. Hepatitis A: The hepatitis A virus is transmitted through ingestion of contaminated food and water or through direct contact with an infectious person.
2. Hepatitis B: Hepatitis B is a serious liver infection caused by the hepatitis B virus. For most people, hepatitis B is short-term, also called acute, and lasts less than six months.
3. Hepatitis C: Hepatitis C is a liver infection caused by the hepatitis C virus (HCV). Hepatitis C is spread through contact with blood from an infected person.
4. Hepatitis D: Hepatitis D is spread when blood or other body fluids from a person infected with the virus enter the body of someone who is not infected.
5. Hepatitis E: The virus is transmitted via the fecal-oral route, principally through contaminated water. Hepatitis E is found worldwide, but the disease is most common in East and South Asia.
Symptoms of Hepatitis:
Hepatitis may start and get better quickly. It may also become a long-term condition. In some cases, hepatitis may lead to liver damage, liver failure, cirrhosis, liver cancer, and even death. There are several factors that can affect how severe the condition is. These may include the cause of the liver damage and any illnesses you have. Hepatitis A, for example, is most often short-term and does not lead to chronic liver problems.
The symptoms of hepatitis include:
- Pain or bloating in the belly area.
- Dark urine and pale or clay-colored stools.
- Fatigue.
- Low-grade fever.
- Itching.
- Jaundice (Yellowing of skin or eyes).
- Loss of appetite.
- Nausea and vomiting.
- Weight loss.
Examinations and Tests:
In hepatitis, some pathological tests are done in this procedure. A lab technician draws a small amount of blood from your vein and sends it to a laboratory for testing hepatitis.
Ultrasound (USG) is the best way to find hepatitis or other liver diseases. During a USG exam, a technician will apply gel to the abdomen and use a transducer to send sound waves through the skin. The sound waves bounce off the internal organs and create an image that can be seen on a monitor. In the case of hepatitis, a USG can help identify scarring on the liver and the extent of the damage.
In addition to diagnosing, monitoring the progression of the disease and the effectiveness of treatment is necessary. In some cases, additional imaging tests may be needed to confirm a diagnosis of Hepatitis. These may include CT scans and MRI scans. This can provide more detailed information about the extent of the scarring and the potential for liver failure.
Prevention for hepatitis:
Talk to your healthcare provider about having a vaccine to prevent hepatitis A and hepatitis B. Steps for preventing the spread of hepatitis B and C from one person to another include:
- Avoid sharing personal items, such as razors or toothbrushes.
- Do not share drug needles or other drug equipment (such as straws for snorting drugs).
- Clean blood spills with a mixture of one part household bleach to nine parts water.
- Do not get tattoos or body piercings with instruments that have not been cleaned properly.
Name :- Rahat Aaliya
BVRMIT
4th semester
Saurav Kumar
BVRMIT -VI Sem
Student ZHI
Title- - Liver Cirrhosis Date - 17-02-23
Author-Saurav Kumar FR-01/11-A017
Liver cirrhosis is a chronic disease characterized by the scarring of liver tissue, leading to liver dysfunction and potential liver failure. The liver is a vital organ responsible for filtering toxins from the blood, producing bile for digestion, and storing energy. When the liver is damaged, it can no longer perform these functions effectively, leading to serious health problems.
There are many potential causes of liver cirrhosis, including long-term alcohol abuse, viral hepatitis, and nonalcoholic fatty liver disease. Symptoms of liver cirrhosis may include fatigue, jaundice, itching, abdominal swelling, and confusion.
One important tool for diagnosing liver cirrhosis is ultrasound imaging. Ultrasound uses high-frequency sound waves to create images of the internal organs. An ultrasound scan can help identify the presence of liver cirrhosis, as well as other liver diseases.
During an ultrasound exam, a technician will apply a gel to the abdomen and use a transducer to send sound waves through the skin. The sound waves bounce off the internal organs and create images that can be seen on a monitor. In the case of liver cirrhosis, an ultrasound can help identify the scarring on the liver and the extent of the damage.
In addition to diagnosing liver cirrhosis, ultrasound can also be used to monitor the progression of the disease and the effectiveness of treatment. For example, if a patient is undergoing treatment for viral hepatitis, regular ultrasound exams can help doctors determine if the treatment is reducing the amount of scarring on the liver.
In some cases, additional imaging tests may be needed to confirm a diagnosis of liver cirrhosis. These may include CT scans, MRI scans, or liver biopsy. A liver biopsy involves taking a small sample of liver tissue for examination under a microscope. This can provide more detailed information about the extent of the scarring and the potential for liver failure.
It is important to note that while ultrasound can be a valuable tool for diagnosing liver cirrhosis, it is not always able to detect early stages of the disease. In some cases, additional testing may be required to confirm a diagnosis.
In conclusion, liver cirrhosis is a serious condition that can have significant impacts on a person's health and quality of life. Early diagnosis and treatment are essential for managing the disease and preventing further liver damage. Ultrasound imaging can be an important tool for diagnosing and monitoring liver cirrhosis, but it should always be used in conjunction with other diagnostic tests and under the guidance of a healthcare professional.
Title- -CT Scan in Epilepsy Date - 31-01-23
Author Shashi FR-01/11-A016
Epilepsy is a neurological disorder characterized by recurring seizures. These seizures are caused by abnormal electrical activity in the brain. In order to diagnose epilepsy, medical professionals often use a variety of imaging techniques to get a clear picture of the brain. One of the most commonly used imaging techniques is the CT (Computed Tomography) scan.
The CT scan is a non-invasive procedure that uses X-rays and a computer to produce detailed images of the brain. It provides detailed information about the structure of the brain, including the size, shape and position of the brain and its various components. This information is useful for identifying any structural abnormalities that may be contributing to the seizures.
One of the main benefits of CT scans in epilepsy is their ability to identify lesions or abnormalities in the brain. These may include tumors, bleeding, cysts, or other changes in the brain tissue. These changes can be the underlying cause of epilepsy and can be treated or monitored with the help of a CT scan.
CT scans can also help in the diagnosis of focal epilepsy. This type of epilepsy is caused by a specific area of the brain and is diagnosed when seizures originate from that specific area. A CT scan can help identify the location of this focal point, making it easier for medical professionals to diagnose and treat the condition.
Another benefit of CT scans in epilepsy is their ability to detect any changes in the brain that occur over time. This is particularly useful for people who have been diagnosed with epilepsy and are receiving treatment, as it can help determine if the treatment is effective or if there have been any changes in the condition.
In conclusion, CT scans play a crucial role in the diagnosis and treatment of epilepsy. They provide detailed images of the brain, which helps medical professionals identify any structural abnormalities that may be contributing to the seizures. This information can also be used to determine the location of the focal point, monitor changes in the brain over time, and monitor the effectiveness of treatment. If you or someone you know has been diagnosed with epilepsy, it is important to discuss the benefits of a CT scan with a medical professional.
Shashi Ranjan
Single Plane and Bi Plane Imaging in Angiography Date - 20-12-22 Author Stelin Selwamoni FR-01/11-A015
Cath lab is an examination room in a hospital or clinic with diagnostic imaging equipment used to visualize the arteries of the heart and the chambers of the heart and treat any stenosis or abnormality found.
Most catheterization laboratories are "single plane" facilities, those that have a single X-ray generator source and an x-ray image intensifier for fluoroscopic imaging. Older cath labs used cine film to record the information obtained, but since 2000, most new facilities are digital. The latest digital cath labs are biplane (have two X-ray sources) and use flat panel detectors.
Biplane imaging is one of the most advanced interventional medical imaging technologies available. It uses two rotating cameras, one on each side of the patient, to take simultaneous images. ... When combined on a computer screen, the two sets of images form a 3-D portrait of the area the doctor wants to study.
Biplane imaging also allows doctors to follow the path of blood flow through your vessels and to create a "roadmap" for reaching and treating the precise location of disease or malformation. Also known as angiography, this process involves inserting a small catheter into an artery, a similar procedure to getting an IV. New Technology Expands Treatment for Stroke, Aneurysms and Peripheral Vascular Disease
Biplane Angiography System expands diagnostic and treatment options for vascular and neurovascular problems, including stroke, aneurysms and peripheral vascular disease. Benefits include:
Procedure times are shorter because two angles of the imaging area are captured simultaneously
Less contrast dye is required and radiation exposure is reduced
The images show spatial relations more accurately, allowing physicians to rapidly target problem areas
Treatment for peripheral artery disease is improved because the degree of blockage is more visible. This allows physicians to view their position throughout the stenting process.
Biplane Specifications
Capture images from two axes using two c-arms
Fast image reconstruction
Shorter examination time
More efficient than single plane
Low radiation dose
Biplane Combines Diagnosis and Treatment
Biplane imaging can also be used to path the blood flow through vessels, which helps to find the precise location of the disease or malformation.
Using a small amount of injectable dye to make the blood flow easier to see, the biplane imaging cameras take x-rays that the doctor can view in real time.
This helps them quickly determine if there are blockages or aneurysms, and determine the best way to provide treatment.
In many cases, the doctor can use the detailed images to help guide minimally invasive procedures to treat blockages, aneurysms or blood clots in the brain – right there in the interventional suite.
Combining diagnosis and treatment into one procedure saves valuable time, and can make all the difference in recovery for patients with stroke or other severe neurovascular complications.
Biplane Imaging Capabilities
This versatile biplane technology means our medical team can provide comprehensive care for even the most complex patients.
For example, it enables endovascular coiling for the treatment of aneurysms. Doctors use a catheter to guide a wire into the aneurysm. The wire coils up inside the aneurysm, stopping the blood flow and sealing off the aneurysm from the artery.
Biplane imaging is especially helpful during cerebral vascular angiography, an interventional radiology procedure used to take images of the blood vessels in the brain. The 3-D images can help locate blockages that cause ischemic stroke and identify aneurysms and arteriovenous malformations (a tangle of arteries and veins) that cause hemorrhagic stroke.
Biplane can also assist doctors with stent placement and guiding catheters through the brain. Biplane is also used during neuro coiling, a minimally invasive procedure that blocks blood flow to an aneurysm.
It can also help cut off blood supply to tumors.
Effectiveness of Biplane Angiography Compared to Monoplane Angiography for Vascular Neuro-Interventions
The advantages that a biplane system can provide in terms of safety, quality of care, support to university teaching programmes based on best practices, enhanced capability in performing complex procedures, this technology should be implemented with a responsibility to collect outcome data to optimise the clinical protocol regarding the dose of ionising radiation delivered.
Bi-plane labs-advanced technology for neurovascular procedures
Time is of the essence when it comes to neurological ailments. Be it a stroke, aneurysm or head trauma, fast, safe and timely intervention is essential for a good outcome of the patient. Keeping this in mind, the best hospitals in India are investing in Biplane Cath Labs for Neuro-intervention.
This technology aids in the Diagnosis as well as treatment of disorders related to brain spinal cord, neck and face.
Diagnostic:
Digital subtraction cerebral angiography
Digital subtraction spinal angiography
Therapeutic:
Cerebral aneurysm,
Subarachnoid hemorrhage
Stroke/ Paralytic attack
Intracranial hemorrhage
Carotid Stenosis/blockage
Brain arteriovenous malformation (AVM)
Spinal arteriovenous malformation and fistula
Cerebral Venous Sinus Thrombosis
Inferior Petrosal Sinus Sampling
Bi-Plane Cath Labs vs Single-Plane Cath Labs
Single Plane Versus BiPlane
There are scads of options on the table as you begin doing your homework and narrowing down the field. One of the major options will run across is whether you want a single or bi-plane cath lab system.
Single and bi-plane cath labs differ from one another in several main ways:
1. Image Acquisition Speed
2. Specialization
3. Space Requirements
4. Site Preparation
Image Acquisition Speed
Because bi-plane systems capture image data from detectors on two axes, they are able to acquire 3D images faster. This is especially useful in neurovascular and electrophysiology (EP) procedures. Single-plane labs are also capable of 3D imaging, but the time it takes the C-arm to move and the software’s reconstruction process cause a delay. Additionally, 3D software is not native to single-plane labs and must be added for 3D imaging to be done.
Specialization
The type of work you plan to use your lab for will have at least as much (if not more) weight in your decision between a bi-plane and a single-plane cath lab as any other difference we'll discuss here. Bi-plane and single-plane cath labs are designed with certain specialties in mind. If your facility is planning for a dedicated neuro or EP lab, for example, you'd be best served by a bi-plane system. And if other study types come into that room on occasion, you can adjust settings to use only one of your system's C-arms.
If the work leans in a more general/blended direction (balloons, stents, angio runs, etc.) a single-plane lab can be flexible across a number of specialties and, if properly equipped with 3D software, also suffice for Neuro and EP.
Space Requirements
With a second C-arm and the cabinets of electronics required to run it, anyone would guess that a bi-plane system has a larger footprint than a single-plane system, but many don't realize how much bigger. Take for instance the GE Innova series: GE recommends a space almost 200 square feet larger for bi-plane! If the work you're planning to do calls for bi-plane technology, don’t get scared by these dimensions. Experienced installers can do a lot to get either version of a system into more conservative spaces, but be aware that you might need more room than you think.
Cath Lab Site Preparation
We can probably guess what this paragraph is going to say: double the c-arms = double the site prep. That might be an oversimplification, but there will be significantly more involved in getting your space ready for a bi-plane cath lab. There needs to be a ceiling support installed for the second c-arm, additional rigging is necessary, and the system has an overall larger footprint.
Any cath lab has both ceiling (monitors, maybe the gantry) and floor-mounted (table, maybe gantry) components. For a bi-plane, you have to plan for both a floor and a ceiling-mounted gantry. In the case of the Innova biplane, there’s around 2,000 lbs of additional weight hanging from the ceiling vs. its single plane counterpart, including the ceiling “Lateral Positioner” (gantry), additional rails, and additional monitors.
Cost Difference
Bi-plane cath labs simply come with more "stuff", therefore they cost more than single-plane systems. However, while there are double the critical components (tubes, collimators, detectors, computers), service pricing isn't twice as much. Currently, service coverage for a bi-plane cath lab averages 25-30% higher than service for a single-plane system.
Digital Substraction Angiography Date - 19-12-2022
Monday FR-01/11-A014
DSA technique
Digital subtraction angiography is used to produce images of the blood vessels without interfering shadows from overlapping tissues. This provides a clear view of the vessels and allows for a lower dose of contrast medium
the non-contrast image (mask image) of the region is taken before injecting contrast material and therefore shows only anatomy, as well as any radiopaque foreign bodies (surgical clips, stents, etc.) as would a regular x-ray image.
contrast images are taken in succession while contrast material is being injected. These images show the opacified vessels superimposed on the anatomy and are stored on the computer.
the mask image is then subtracted from the contrast images pixel by pixel. The resulting subtraction images show the filled vessels only.
recording can continue to provide a sequence of subtracted images based on the initial mask.
the subtraction images can be viewed in real-time. Even if the patient lies still, there is bound to be some degree of misregistration of images due to movement between the acquisition of the mask image and the subsequent contrast images. The effect is prominent at high-contrast interfaces, such as bone-soft tissue, metal staples and coils, and bowel air. Pixel shifting (either manual or automatic), i.e. moving the mask retrospectively, can minimize misregistration, but focal movement such as bowel peristalsis, will not be corrected.
It should be noted that since image subtraction causes a decrease in signal-to-noise ratio, the subtraction images appear noisier than the source images. The inevitable solution to this is to increase mA. There are also algorithms in place for reducing scatter.
Procedural technique
For every purpose, there is at least one technique, but common to them all is the application of DSA for visualization:
the patient lies on the angiography table
local anesthesia is administered at the intended puncture site (usually lidocaine hydrochloride 1% or 2% w/v)
in certain procedures (e.g. a child undergoing cerebral angiography), general anesthesia is performed
the Seldinger technique is used to gain access to a blood vessel
ultrasound is often used for visualizing the vessel in real-time for puncturing
a standard access kit includes a straight 18 gauge needle and .035" guidewires, on which the diagnostic and therapeutic catheters are threaded
in many cases, a micro-introducer access kit (.018" guidewire threaded through a 21 gauge initial access needle) is used for access, either for the entire procedure or to be replaced with the standard kit. Using a micro-introducer facilitates less traumatic entry and can be retrieved without massive bleeding should there be a need for re-puncturing
on procedure completion, hemostasis is applied to the puncture site
Postprocedural care
This depends on the nature of the procedure and whether it was performed on an inpatient or outpatient basis.
Patient should be immobilized for 4-6 hours and keep on supine position. Frequent observations should be done to look for puncture site hematomas, which is the commonest complication.
Complications
Complications can be categorized into local and systemic complications:
Local complications (puncture site):
from the puncture site (commonest complication)
thrombus formation
local tissue damage
arteriovenous fistula
Systemic complications:
thromboembolism
air embolism
vessel dissection
See specific procedures for specific complications.
Rise in sudden heart attacks among healthy young Indians. What's driving it?© Provided by India Today Date - 17-12-2022
Story by Tirtho Banerjee • Tuesday FR-01/11-A013
Cases of sudden heart attacks and strokes among healthy, young and middle-aged Indians are becoming prevalent, a survey by LocalCircles, a community social media platform, has revealed. And these growing medical conditions are impacting both the vaccinated and unvaccinated people.
Rise in sudden heart attacks among healthy young Indians. What's driving it?© Provided by India Today
As many as 51% of people have one or more individuals in their close network who have experienced heart or brain stroke, blood clots, neurological complications, cancer acceleration or other sudden medical conditions in the last two years, the survey said.
The percentage of those knowing one or more individuals with sudden severe ailments or complications rose from 31% to 51% within a year, the study found.
Also Read | Bride's father dies while dancing day before wedding in Uttarakhand
A total of 62% of the people in their close network experiencing such severe conditions were double dose vaccinated; 11% were single dose vaccinated while 8% were unvaccinated, the study added.
Interestingly, 61% of the people in their close network experiencing severe medical conditions had experienced Covid once or more while 28% said their contacts with such severe conditions did not have Covid, pointed out the survey, which received over 32,000 responses from citizens located in 357 districts of India.
Over 200 million people worldwide may currently be having long Covid condition where they are experiencing myocarditis, pericarditis, brain fog or memory issues, sleep apnea, fatigue, joint pain and other health conditions, according to researchers.
Every Indian Should Get This Incredible Rs.2499 Smartwatch
In the last three months, many healthy, young and middle-aged individuals, both men and women, have experienced a heart attack and died. In several of these cases, the individual was engaged in some physical activity like dance, gym, walking etc. when they experienced cardiac arrest. What is driving such sudden deaths?
"Stroke has been seen as a manifestation of Covid-19 in various studies showing that 0.9% to 23% of Covid-19 patients developed stroke," stated Bengaluru-headquartered Narayana Health. Based on its study of Covid-19 impact, Narayana Health in a blog post stated stroke can manifest in severely affected Covid-19 patients who initially develop Covid-19 symptoms and later on develop stroke as a multi-organ involvement. Few studies have shown that some patients present with stroke as an initial manifestation and later on are found to have Covid-19; these are young patients without risk factors for brain stroke.
Also Read | 16-year-old dies while playing cricket in UP's Kanpur, heart attack suspected
Though the Ministry of Health and Family Welfare came out with a 'National Comprehensive Guidelines for Management of post-Covid sequelae" for doctors last year, not much seems to have been done to inform citizens, both vaccinated and unvaccinated, who survived more than one bout of Covid or its variants, on possible complications and the need to avoid Covid reinfections, the survey underlined.
The government guidelines at the onset state "cardiovascular sequelae not only occur in symptomatic Covid-19 patients but have also been reported in asymptomatic patients. Up to 20%–30% of patients hospitalized with severe Covid-19 have evidence of myocardial involvement manifested by elevated troponin levels, venous thromboembolism, heart failure and arrhythmias".
Sachin Taparia, founder of LocalCircles, said, "The need of the hour here is for the government to take extensive research on these severe medical conditions experienced by people and study this in the context of the impact of Covid by variant and the impact of vaccine by vaccine make and batch numbers. At the same time, the number of Covid infections experienced should also be considered. All of this will bring some clarity to the issue as to what are some of the root causes behind these severe medical conditions experienced by people. It will also enable us to get better prepared for what could be coming."
Vesicovaginal fistula Date - 02-12-2022
USG Case Study- Dr SURAJ RAI FR-01/11-A012
Hello everyone, good morning,
Yesterday on 01-12-2022 a patient came to my clinic and told me about her complications with urine discharge, Actually, she was suffering from multiple time involuntary urination through the vagina (especially at night) and pain in the internal vagina,
When I heard that the Involuntary discharge of urine through the vagina, It immediately hit in mind that it could be a case of VVF(vesicovaginal fistula).
On ultrasound, I saw a Fistulous track between the posterior wall of the bladder and the vaginal loop and an echogenic stone trapped there.
The gap was measuring about 5.t mm and the minimal collection was noted in the vaginal loop which echoes the pattern same as the filled urinary bladder .so in my view it is the case of VVF.
So here I want to tell you all about the vaginal fistula. The actual vaginal have mainly two portions anterior wall and the posterior wall, if a fistula( gap) forms in the anterior wall, it is called an anterior genital fistula, and whereas gap forms in the posterior wall it is called a posterior genital fistula, anterior genital fistula can be formed between the urinary bladder, ureters, and urethra
Note
-Fistulous track between urinary bladder. and vagina- vesicovaginal fistula.
-ureter and vagina - ureterovaginal fistula.
-Urethra and vagina - urethrovaginal fistula.
Posterior genital fistula can form between the colon/intestine and rectum,
If a fistulous track between
-Colon and vagina- colonovaginal fistula /enterovaginal fistula.
-Rectum and vagina- rectovaginal fistula.
Other causes of genital fistula:
Genital injury,conginital birth during childbirth prolonged labor presses the unborn child tightly against the pelvis, otherwise, it can happen after DNC, Hysterectomy, or any pelvis operation. But in my experience, I had always found it after hysterectomy. some other causes like rectocele, colonel, cystocele, etc.
Symptom - vaginitis, recurrent infection, recurrent discharge, lower pain.
Let's discuss treatment,
guys once a fistula forms then the only way to treat is a surgical procedure
The vesicovaginal fistula is typically repaired either by transvaginal approch or laparoscopically, if the patient had multiple transvaginal procedures done then sometimes attempt the final repair through a large abdominal incision or laparotomy.
Here some complications may possible after surgery.
1- recurrent formation of fistula
2-injury to ureter, bowel, or intestine.
3-vaginal shorting.
...
By- Dr.Suraj Rai.
Scanned by Dr Suraj
Title -Cardiovascular System Summary Notes Download Pictorial Notes of CVS
Prepared by Shafi Fifth Semester
BVRMIT Dr Zakir Husain Institute, Patna 26-11-2022
The cardiovascular system includes:
The heart, a muscular pump
The blood, a fluid connective tissue
The blood vessels, arteries, veins and capillaries
Blood flows away from the heart in arteries, to the capillaries and back to the
heart in the veins
There is a decrease in blood pressure as the blood travels away from the heart
Arterial branches of the aorta supply oxygenated blood to all parts of the body
Deoxygenated blood leaves the organs in veins
Veins unite to form the vena cava which returns the blood to the heart
Pulmonary System
This is the route by which blood is circulated from the heart to the lungs and
back to the heart again
The pulmonary system is exceptional in that the pulmonary artery carries
deoxygenated blood and the pulmonary vein carries oxygenated blood
Hepatic Portal Vein
There is another exception in the circulatory system – the hepatic portal vein
Veins normally carry blood from an organ back to the heart
The hepatic portal vein carries blood from the capillary bed of the intestine to
the capillary bed of the liver
As a result, the liver has three blood vessels associated with it
Arteries and Veins
The central cavity of a blood vessel is called the lumen
The lumen is lined with a thin layer of cells called the endothelium
The composition of the vessel wall surrounding the endothelium is different in
arteries, veins and capillaries
Arteries carry blood away from the heart
Arteries have a thick middle layer of smooth muscle
They have an inner and outer layer of elastic fibres
Elastic fibres enable the artery wall to pulsate, stretch and recoil, thereby
accommodating the surge of blood after each contraction of the heart
Smooth muscle can contract or become relaxed
This contraction or relaxation brings about vasodilation or vasoconstriction to
control blood flow
During strenuous exercise the arterioles leading to the muscles undergo
vasodilation – the circular muscle in the arteriole wall is relaxed and the lumen is
wide
This allows an increased blood flow to the skeletal muscles
At the same time, the arterioles leading to the small intestine undergo
vasoconstriction
The circular muscles are contracted and the lumen is narrow
As a result, this reduces the blood flow to the gut
Veins carry blood back to the heart
The muscular layer and layers of elastic fibres in the vein wall are thinner than
those in an artery because blood flows along a vein at low pressure
The lumen of a vein is wider than that of an artery
Valves are present in veins, to prevent the backflow of blood
Following two slides compare an artery and vein
Capillaries and Exchange of Materials
Blood is transported from arterioles to venules by passing through a dense
network of blood vessels called capillaries
All exchanges of substances between blood and living tissue takes place through
capillary walls
Capillary walls are composed of endothelium and are only one cell thick
Plasma is a watery yellow fluid containing dissolved substances such as glucose,
amino acids, blood cells, platelets and plasma proteins
Blood arriving at the arteriole end of a capillary bed is at a higher pressure than
blood in the capillaries
As blood is forced into the narrow capillaries, it undergoes pressure filtration
and much of the plasma is squeezed out through the thin walls
This liquid is called tissue fluid
The only difference between plasma and tissue fluid is that plasma has proteins
Tissue fluid contains a high concentration of dissolved food, oxygen, useful ions
etc.
These diffuse, down a concentration gradient, into the surrounding cells
Carbon dioxide and other metabolic wastes diffuse out of the cells, down a
concentration gradient, into the tissue fluid to be excreted
Tissue fluid and Lymph
Much of the tissue fluid returns to the blood in the capillaries at the venule end
of the capillary bed
This is brought about by osmosis
Tissue fluid lacks plasma proteins so it has a higher water concentration than
the blood plasma
Some of the tissue fluid does not return to the blood in the capillaries
This excess tissue fluid is absorbed by thin-walled lymphatic vessels
When the tissue fluid is in the lymphatic vessel it is called lymph
Tiny lymph vessels unite to form larger vessels
Flow of lymph is brought about by the vessels being compressed when muscles
contract during breathing, movement etc.
Larger lymph vessels have valves to prevent backflow
Lymph vessels return their contents to the blood via two lymphatic ducts
These enter the veins coming from the arms
Structure and Function of the Heart
Continuous circulation of blood is maintained by a muscular pump, the heart
The heart is divided into 4 chambers, two atria and two ventricles
The right atrium receives deoxygenated blood from all parts of the body via the
vena cavae
Deoxygenated blood passes into the right ventricle before leaving the heart
through the pulmonary artery
The pulmonary artery divides into two branches, each leading to a lung
Oxygenated blood returns to the heart by the pulmonary veins
It flows from the left atrium to the left ventricle before leaving the heart by
the aorta
The wall of the left ventricle is more muscular and thicker than that of the
right ventricle
The left ventricle is required to pump blood all around the body
The right ventricle only pumps blood to the lungs
Valves between the atria and ventricles are the atrio-ventricular (AV) valves
Valves prevent the backflow of blood
The presence of valves ensures the blood flows in one direction through the
heart
Semi-lunar valves are present at the origins of the pulmonary artery and the
aorta
These valves open during ventricular contraction allowing flow into the arteries
When arterial pressure exceeds ventricular pressure, they close
Cardiac Function
At each contraction the right ventricle pumps the same volume of blood through
the pulmonary artery as the left ventricle pumps through the aorta
Heart rate (pulse)
This is the number of heart beats per minute
Stroke volume
This is the volume expelled by each ventricle on contraction
Cardiac output is the volume of blood pumped out of a ventricle per minute
It is summarised by the following equation –
CO = HR X SV
HR is heart rate, SV is stroke volume
Pulse, health indicator
If a person is fit, the quantity of cardiac muscle present in their heart wall is
greater and more efficient than that of an unfit person
A very fit person tends to have a lower pulse rate than an unfit person – the fit
person’s heart is larger and stronger
A fit person’s stoke volume is greater
A fit person’s heart does not need to contract as often to pump an equal volume
of blood round the body
Title-Interventional Radiology Date 24-11-2022 FR-01/11-A010
Author-Azmat Ali , Co-Author -Prof Fazal Ahmad
Interventional radiology helps to diagnose and treat disease. Wide range of medical conditions can be treated by inserting various small tools, such as catheters or wires from outside the body. X-ray and imaging techniques such as C Arm, U Arm, CT scan, Ultrasound etc. help to guide the radiologist. Interventional radiology can be used instead of surgery for many conditions and even it is very useful during surgical procedure. Most IR treatments are minimally invasive alternatives to open and laparoscopic surgery. As many IR procedure starts with passing a needle through the skin to the target it is some time called pinhole surgery.
Interventional radiologists do a variety of procedures, including:
· Angiography. This is an X-ray of the arteries and veins to find blockage or narrowing of the vessels, as well as other problems.
· Angioplasty. The doctor puts a small balloon-tipped catheter into a blood vessel. Then he or she inflates the balloon to open up an area of blockage inside the vessel.
· Embolization. The doctor puts a substance through a catheter into a blood vessel to stop blood flow through that vessel. This can be done to control bleeding.
· Gastrostomy tubes. The doctor puts a feeding tube into the stomach if you can’t take food by mouth.
· Intravascular ultrasound. The doctor uses ultrasound to see inside a blood vessel to find problems.
· Stent placement. The doctor places a tiny mesh coil (stent) inside a blood vessel at the site of a blockage. He or she expands the stent to open up the blockage.
· Foreign body removal. The doctor puts a catheter into a blood vessel to remove a foreign body in the vessel.
· Needle biopsy. The doctor puts a small needle into almost any part of the body, guided by imaging techniques, to take a tissue biopsy. This type of biopsy can give a diagnosis without surgery. An example of this procedure is called the needle breast biopsy.
· IVC filters. The doctor puts a small filter into the inferior vena cava (IVC). This is a large vein in your abdomen. The filter catches blood clots that may go into your lungs
· Injection of clot-dissolving medicines. The doctor injects clot-dissolving medicines such as tissue plasminogen activator. This medicine dissolves blood clots and increases blood flow to your arms, legs, or organs in your body.
· Catheters insertions. The doctor puts a catheter into a large vein to give chemotherapy medicines, nutrition, or haemodialysis. He or she may also put in a catheter before a bone-marrow transplant.
· Cancer treatment. The doctor gives the cancer medicine directly to the tumour site.
Title- -AHTESHAM Student of 4th Semester BVRMIT
22 Nov 2022 FR-01/11-A009
Computed tomography
Computed tomography (CT), also known as, especially in the older literature and textbooks,
computerized axial tomography (CAT), is an imaging modality that uses x-rays to build cross-sectional
images (“slices”) of the body. Cross-sections are reconstructed from measurements of attenuation
coefficients of x-ray beams passing through the volume of the object studied.
CT is based on the fundamental principle that the density of the tissue passed by the x-ray beam can be
measured from the calculation of the attenuation coefficient. Using this principle, CT allows the
reconstruction of the density of the body, by a two-dimensional section perpendicular to the axis of the
acquisition system.
The CT x-ray tube (typically with energy levels between 20 and 150 keV), emits N photons
(monochromatic) per unit of time. The emitted x-rays form a beam that passes through the layer of
biological material of thickness Δx. A detector placed at the exit of the sample, measures N + ΔN
photons, ΔN smaller than 0. Attenuation values of the x-ray beam are recorded and the data is used to
build a 3D representation of the scanned object/tissue.
There are two processes of absorption: the photoelectric effect and the Compton effect. This
phenomenon is represented by a single coefficient, mju.
In the particular case of CT, the emitter of x-rays rotates around the patient and the detector, placed on
diametrically opposite sides, picks up the image of a body section (beam and detector move in
synchrony).
Unlike x-ray radiography, the detectors of the CT scanner do not produce an image. They measure the
transmission of a thin beam (1-10 mm) of x-rays through a full CT of the body. The image of that section
is taken from different angles, and this allows to retrieve the information on the depth (in the third
dimension).
To obtain tomographic images of the patient from the “preprocessed” CT dataset, the computer uses
complex mathematical algorithms for image reconstruction.
If the x-ray at the exit of the tube is made monochromatic or quasimonochromatic with the proper filter,
one can calculate the attenuation coefficient corresponding to the volume of irradiated tissue by the
application of the general formula of absorption of the x-rays in the field (see Figure 1).
The outgoing intensity I(x) of the beam of photons measured will depend on the location. I(x) is smaller
where the body is more radiopaque.
Sir Godfrey Hounsfield, the co-developer of CT, chose a scale that reflects the four basic x-ray densities
in the human body, with the following values:
Air = -1000 HU (Hounsfield units)
Fat = -60 to -120 HU
Water = 0 HU
Compact bone = +1000 HU
The image of the section of the object irradiated by the x-ray is reconstructed from a large number of
measurements of attenuation coefficient. It gathers together all the data coming from the elementary
volumes of material through the detectors. Using the computer, it presents the elementary surfaces of
the reconstructed image from a projection of the data matrix reconstruction, the tone depending on the
attenuation coefficients.
The CT image is a digital image and consists of a square matrix of elements (pixel), each of which
represents a voxel (volume element) of the tissue of the patient.
In conclusion, a measurement made by a detector CT is proportional to the sum of the attenuation
coefficients.
The typical CT Image is composed of 512 rows, each of 512 pixels, i.e., a square matrix of 512 x 512 =
262,144 pixels (one for each voxel). In the process of the image, the value of the attenuated coefficient
for each voxel corresponding to these pixels needs to be calculated.
Each image point is surrounded by a halo-shaped star that degrades the contrast and blurs the boundary
of the object. To avoid this, the method of filtered back projection is used. The action of the filter
function is such that the negative value created is the filtered projection, when projected backwards, is
removed, and an image is produced, which is the accurate representation of the original object.
The CT deals with the attenuation of the x-rays during the passage through the body segment. However,
several features distinguish it from conventional radiology: the image is reconstructed from a large
number of measurements of attenuation coefficient.
Before the data are presented on the screen, the conventional rescaling was made into CT numbers,
expressed in dimensionless Hounsfield Units (HU), as mentioned above. CT numbers based on
measurements with the EMI scanner invented by Sir Godfrey Hounsfield 6, a Nobel prize winner for his
work in 1979, related the linear attenuation coefficient of a localized region with the attenuation
coefficient of water, the multiplication factor of 1000 is used for CT number integers.
So, the signal transmitted by the detector is processed by the PC in the form of digital information, the
CT image reconstruction.
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Terminology
Although it is common to hear and see the use of the term “CT scan”, the addition of the word “scan” is
redundant in most use cases. For example, “Mrs JS had a CT scan of her chest” is rendered no less
understandable if instead “Mrs JS had a CT of her chest” is used. Indeed the addition of the word scan
here is entirely superfluous; in the same tautological vein, stating “MRI scan” is also pointless. Quite
clearly “bone scan” is different as the term scan here is being used as a synonym for scintigraphy. “Mrs
JS had a bone scan” is unintelligible if “Mrs JS had a bone” replaces it!
However, calling the hardware used to obtain the CT, a CT scanner is acceptable, not least so that a
reader understands that the text is referring to the hardware itself and not the digital image outputted.
Although, in many cases, the context will mean that, for example, talking about how “we have installed
a new CT”, means that the word scanner is not always necessary
Title- Biliary Atresia -Author -Ramjan Ansari Student of 4th Semester BVRMIT
18 Nov 2022 FR-01/11-A008
Biliary atresia (BA) is a congenital biliary disorder, which is characterized by an absence of the extrahepatic biliary tree.
It is one of the most common causes of neonatal cholestasis, often causing cirrhosis immediately and leading to death and accounts for over half of children who undergo liver transplantation.
Clinical presentation It presents within the first three months of life. Infants with biliary atresia may appear normal and healthy at birth.
Most often, symptoms develop between two weeks to two months of life, and may include: Jaundice (conjugated hyperbilirubinemia) Dark yellow or brown urine Pale or clay-colored (acholic) stools Hepatomegaly Treatment and prognosis
It is important to diagnose biliary atresia early since Kasai portoenterostomy done within the initial two months of life has very good prognosis.
Author -Abdul Majid Khan 17-11-22
BVMRIT 4th Sem Student , Dr Zakir Husain Student FR-01/11-A004
MALARIA
Malaria is a serious and sometimes life-threatening tropical disease that is caused by a parasite and spreads through mosquitoes.
It kills more than 445,000 people a year, many of them children in Africa.
Malaria is caused by plasmodium parasites, which are carried by anopheles mosquitoes
Causes of Malaria
There are many factors that can cause malaria, such as –
• Bitten by a malarial vector (Anopheles stephensi)
• Use of shared and infected syringes.
• Organ transplantation.
• Transfusion.
• From an infected mother to her baby during birth.
VECTOR
Only female mosquitoes spread the malaria parasites. When a mosquito bites a person who has malaria, it drinks the person’s blood , which contains the parasites. When the mosquito bites another person, it injects the parasites into that person. That’s how the disease spreads.
TYPES OF MALARIA
There are four species of plasmodium parasites that affect humans.
Plasmodium falciparum , P. vivax , P. malariae , P. ovale.
But two of them are considered the most dangerous:
P. falciparum.This is the most common malaria parasite in Africa, and it causes the most malaria-related deaths in the world. P. falciparum multiplies very quickly, causing serious blood loss and clogged blood vessels.
P. vivax. This is the malaria parasite most commonly found outside of sub-Saharan Africa, especially in Asia and Latin America. This species can lie dormant, then rise up to infect your blood months or years after the mosquito bite.
LIFE CYCLE OF MALARIA
Malaria parasite exists in the form of a motile sporozoite. The vector of malaria i.e. the female Anopheles mosquito transmits the malarial sporozoites into the hosts. When an infected mosquito bites a human, the sporozoites are injected into the blood through the mosquito’s saliva.
The sporozoites travel into our body and accumulate in the liver. These parasites initially multiply within the liver, by damaging the liver and rupturing the blood cells in the body. Malaria kills by causing the destruction of the red blood cells in the host. The parasites reproduce asexually in the RBCs, bursting the cells and releasing more parasites to infect more cells. The rupture of red blood cells by the malaria parasite releases a toxin called hemozoin which causes the patient to experience a condition known as the chills.
When the female Anopheles mosquito bites an infected human, the parasites enter the mosquito’s body along the human blood it is drinking. It is inside the mosquito’s body that the actual development and maturing of the parasite happens. The parasites produced in the human body reach the intestine of the mosquito where the male and females cells fertilize each other to lead to the formation of a sporozoite. On maturing, the sporozoite breaks out the mosquito’s intestine and migrate to the salivary glands. Once they reach salivary glands, they wait till the mosquito bites another human and the process of infection and disease begins all over again. It is prudent however to observe that the complete development of the malaria parasite takes place in two different hosts; humans and mosquitoes.
Symptoms of malaria
Symptoms of malaria are exhibited within 7 to 18 days of being infected. Common symptoms include:
• Fever, fatigue, chills, vomiting, and headaches
• Diarrhoea, anaemia and muscle pain
• Profuse sweating and convulsions
• Bloody stools.
• In severe cases, malaria can be devastating; it can lead to seizures, coma and eventually, death.
Sir Ronald Ross and his study on the transmission of the disease helped carve the way for future scientists to effectively combat the disease. His deep research showed that specifically, the female Anopheles stephensi mosquito is the vector of the disease, and addressing this problem will prevent malaria and in turn, save countless lives.
Prevention of malaria
Malaria is one of the major causes of preventable death in the world today. It affects more than 500 million people worldwide and causes 1 to 2 million deaths every year. It is a tropical infectious disease and almost 90 per cent of the cases are from Sub-Saharan Africa.
There are two ways to deal with malaria – prevent the mosquito bite from happening (i.e. preventative steps) or attack the parasites once they have infected the body.
The first method advocates the use of mosquito nets and mosquito repellents such as permethrin to prevent mosquitoes from biting. The second form of treatment uses a chemical called Quinine present in the bark of a cinchona tree. A form of drug chloroquine has proven very effective against malaria even though it is not a vaccine.
Malaria Treatment
The treatment your doctor recommends will depend on things like:
• The type of parasite you have
• How bad your symptoms are
• The geographic area where you got infected
• Your age
• Whether you’re pregnant
Medications doctors use to treat malaria include:
• Chloroquine or hydroxychloroquine. Your doctor may recommend one of these drugs if your symptoms aren’t serious and you’re in an area where the parasite hasn’t become resistant to chloroquine.
• Artemisinin-based combination therapy (ACT). This combines two medicines that work in different ways. They’re used to treat milder cases of malaria or as part of a treatment plan for more serious cases.
• Atovaquone-proguanil, artemether-lumefantrine. These combinations are other options in areas where the parasite has become resistant to chloroquine. They also can be given to children. • Mefloquine. This medication is another option if chloroquine can’t be used, but it’s been linked to rare but serious side effects related to your brain and is only used as a last resort.
• Artesunate. If your symptoms are severe, your doctor may recommend this drug as treatment for the first 24 hours, then follow it with 3 days of artemisinin-based combination therapy.
Some parasites that cause malaria have become resistant to almost all the medicines used to treat the illness, so researchers are always looking for new drugs that work.
Malaria Complications
Some people are more likely to have serious health problems if they get malaria, including:
• Young children and infants
• Older adults
• People who travel from places that don’t have the vaccine
• Pregnant women and their unborn children
These health problems can include:
• Coma
• Cerebral malaria (brain damage caused by swelling)
• Pulmonary edema
• Liver, kidney, and spleen failure
• Anemia (when you lose too many red blood cells)
Very low blood sugar
Title -Transform X-ray, Introducing New Systems
Author -Abdullah Saikh BVMRIT 4th Sem Student , Dr Zakir Husain Student FR-01/11-A005
November 3, 2022 -Konica Minolta Healthcare Americas, Inc., a leader in medical
diagnostic imaging and healthcare information technology, announces the introduction
of new digital radiography (DR) solutions that will continue to transform the clinical
value of X-ray. In 2020, Konica Minolta Healthcare launched Dynamic Digital
Radiography (DDR), and now the company is extending this advancement to the new
KDR Flex Overhead X-ray System. Konica Minolta previously announced DDR on the
Chiropractic Straight Arm and the mKDR Xpress Mobile X-ray System, which recently
received US FDA 510(k) clearance for the DDR option. These new systems and the
AeroDR Glassless family of flat panel detectors will be launched at the 2022 Annual
Meeting of the Radiological Society of North America (RSNA), November 27 –
December 1, 2022.
The KDR Flex Overhead X-ray System is a next-generation, smart radiography system
that delivers an array of workflow innovations in addition to incorporating DDR. The
system automatically tracks and aligns the tube to the table or wall stand, facilitating
precision in positioning. The KDR Flex Overhead X-ray System has the flexibility to be
configured as a manual, semi-automated or fully automated system to optimize
workflow, reduce operator fatigue and increase patient satisfaction. A powerful X-ray
generator and Automatic Exposure Control further optimize image quality and help
minimize patient dose. The result is a more effortless system operation that enhances
both the technologist and patient experience.
Konica Minolta shatters the glass ceiling with the latest innovation in wireless digital
detectors. With the AeroDR Glassless Flat Panel Detectors there is no glass substrate,
just a thin film transistor (TFT), further decreasing the panel weight and, as important,
reducing the distance between the scintillator and electronics for superior sensitivity
and outstanding image quality. The AeroDR family of flat panel detectors are renowned
for durability, a powerful 7-year power cell warranty and exceptional high definition
resolution at 100 μm and 200 μm. AeroDR Glassless Flat Panel Detectors are available
in Konica Minolta systems and retrofits to help facilities take advantage of a smart
imaging solution for greater efficiency and optimal image quality.
Konica Minolta is delivering more capabilities with digital radiography that advance and
redefine imaging diagnostics and are available on multiple systems to best meet each
customer’s most demanding needs,” says Guillermo Sander, PhD, Marketing Director for
Digital Radiography, Konica Minolta Healthcare. “Our commitment is to do more with
primary imaging, continually evolving to provide clinicians with diagnostic information
never before available. The ultimate goal is to enhance patient care by enabling better
decisions, sooner.”
With the mKDR Xpress Mobile X-ray System with DDR, clinicians can now capture
anatomy in motion and observe physiological changes during respiration or swallow
studies, right at the patient’s bedside or in the ER, OR, CCU or ICU. DDR adds significant
clinical value to imaging performed at the point-of-care with an exam that is fast and
versatile at a low radiation dose.
DDR was initially introduced on the company’s acclaimed KDR Advanced U-Arm. DDR is
a leap forward in DR technology that acquires individual images at high speed and low
dose. The resulting cine loop enables clinicians to observe anatomical motion over
time, enhancing diagnostic capabilities and providing clinicians with a way to visualize
anatomy like never before.
Author Md Ahtesham Khan
Student Dr Zakir Husain Institute 4th Semester
FR-01/11-A007 Date 17-11-2022
Md Abdullah BVRNIT 4th Sem
Topic Frequency ,Wavelength ,Resolution and Depth in USG
FR-01/11-A006 Date 17-11-2022
12 Nov 2022
Abdullah
Use of Doppler Ultrasonography to Predict the Outcome of Therapy for Renal-Artery Stenosis
BACKGROUND
Prospectively identifying patients whose renal function or blood pressure will improve after
the correction of renal-artery stenosis has not been possible. We evaluated whether a high
level of resistance to flow in the segmental arteries of both kidneys (indicated by resistance-
index values of at least 80) can be used prospectively to select appropriate patients for
treatment.
METHODS
We evaluated 5950 patients with hypertension for renal-artery stenosis using color Doppler
ultrasonography, and we measured the resistance index as follows: [1 – (end-diastolic
velocity ÷ maximal systolic velocity)] × 100. Among 138 patients who had unilateral or
bilateral renal-artery stenosis of more than 50 percent of the luminal diameter and who
underwent renal angioplasty or surgery, the procedure was technically successful in 131 (95
percent). Creatinine clearance and 24-hour ambulatory blood pressure were measured
before renal-artery stenosis was corrected; 3, 6, and 12 months after the procedure; and
yearly thereafter. The mean (±SD) duration of follow-up was 32±21 months
RESULTS
Among the 35 patients (27 percent) who had resistance-index values of at least 80 before
revascularization, the mean arterial pressure did not decrease by 10 mm Hg or more after
revascularization in 34 (97 percent). Renal function declined (defined by a decrease in the
creatinine clearance of at least 10 percent) in 28 (80 percent); 16 (46 percent) became
dependent on dialysis; and 10 (29 percent) died during follow-up. Among the 96 patients (73
percent) with a resistance-index value of less than 80, the mean arterial pressure decreased
by at least 10 percent in all but 6 patients (6 percent) after revascularization; renal function
worsened in only 3 (3 percent), all of whom became dependent on dialysis; and 3 (3 percent)
died (P<0.001 for the comparison with patients with a resistance-index value of at least 80).
CONCLUSIONS
A renal resistance-index value of at least 80 reliably identifies patients with renal-artery
stenosis in whom angioplasty or surgery will not improve renal function, blood pressure, or
kidney survival.
Md Abdullah. From Samastipur
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Title- -Ultrasound knobology
Author -Abdul Majid Khan ,Student of 4th Semester BVRMIT
12 Nov 2022 FR-01/11-A003
Dr. Zakir Husain institute Patna
12 Nov 2022
Abdul Majid Khan
अल्ट्रासाउंड नॉबोलॉजी अल्ट्रासाउंड
Ultrasound
A basic understanding of the physics and orientation ofHowever, standing in front of an ultrasound machine requires some solid judgment – sometimes nobology.
This article covers the basics of probe and probe selection as well as the buttons found on typical ultrasound machines. While these controls are fairly standard, there are variations from machine to machine and users will need to spend some time familiarizing themselves with the actual equipment before entering a patient room. Some additional equipment and logistics concerns are also discussed.
Probes are typically described by the size and shape of their face ("footprint"). Selecting the correct probe for the situation is essential to obtaining good pictures, although there may be times when more than one probe may be appropriate for a given examination. There are three basic types of probes used in emergency and critical care point-of-care ultrasound: linear, curved, and phased array. Linear (sometimes called vascular) probes are generally higher frequency, better for imaging superficial structures and vessels, and are often also called vascular probes. Curvilinear probes may have a wider footprint and lower frequency for transabdominal imaging, or a tighter array (wider field of view) and higher frequency for endocavitary imaging. A phased array probe electronically steers the beam in a close array, producing an image that appears to come from a point and is good for obtaining between the ribs, such as a cardiac ultrasound.
Curved and phased array probes both produce field or "pie-shaped" images, narrower in the near field and wider in the far field, while linear probes typically produce rectangular images on the screen.
Straight Linear Array Probe
(Figure 4-1A)is designed for surface imaging. The crystals align in a linear fashion within a flat head and produce sound waves in a straight line. The image formed is rectangular in shape (Fig. 4-1b). This probe has high
frequencies (5-13 MHz), which provides better resolution and less penetration. Therefore, this probe is ideal for imaging superficial structures and for ultrasound-guided procedures.
Figures are available in PDF so download this article