bowel ischemia: diagnosis

This article is focused on acute mesenteric ischemia . Plain radiographs of the abdomen may reveal thumbprinting, colonic wall thickening, pneumatosis intestinalis, or free intraperitoneal air. The key to early diagnosis is a high level of clinical suspicion. Mallo RD, Salem L, Lalani T, Flum DR. [2] The intestine is mainly supplied by 2 major arteries, which include the superior mesenteric artery (SMA) and the inferior mesenteric artery (IMA). What is small bowel ischemia? The diagnosis of intestinal ischaemia begins with the ability of the clinician to suspect and recognise it. This article provides some information on about this disease, its causes, symptoms, and treatment. Delayed Diagnosis of Small Bowel Obstruction Causes Ischemic Bowel and Sepsis. Acute intestinal ischemia: fever, vomiting or nausea, blood in stool, swelling or tenderness in abdomen, forceful and frequent bowel movements, urgent urge for bowel movement, sudden pain in abdomen. Lab tests: There is no specific blood test for small bowel ischemia, but a blood test can check for high white blood cell counts, a sign of inflammation or infection. 2011 Jul-Aug. 54(1):36-40. . It is considered a medical emergency because it can quickly result in life-threatening infection and death. Results were correlated with surgical findings in 73 cases and clinical follow-up in 71 cases. Additionally, many patients demonstrated decreased His past medical history included Roux-en-Y gastric bypass and surgery to correct scoliosis. The condition can be acute or chronic and may affect the large and/or the small intestine. What Are The Symptoms Of Intestinal Ischemia? A CT-abdomen was performed and the report showed a distal small bowel obstruction. There was a significant association of the small-bowel feces sign with the presence of small-bowel ischemia (P = .046). Mesentery Mesenteric fat stranding and ascites appear with transudation of fluid in the mesentery or the peritoneal cavity caused by elevation of mesenteric venous pressure, which is com-monly seen in strangulating bowel obstruc - tion and venoocclusive bowel ischemia [1, 4, Summary Ischaemic bowel disease can be classified into three types: acute mesenteric ischaemia, chronic mesenteric ischaemia, and colonic ischaemia. RESULTS. What Are The Symptoms Of Intestinal Ischemia? Intestinal ischemia, which can affect the small or large intestine, can be caused by any process that reduces intestinal blood flow, such as arterial occlusion, venous occlusion, or arterial vasospasm. To diagnose ischemic bowel disease, your doctor will do a physical exam to check your abdomen. Results were correlated with surgical findings in 73 cases and clinical follow-up in 71 cases. The acute form of the disease appears suddenly and has severe symptoms. Colonic ischemia may be more prevalent in women. While the condition may begin with mild symptoms, it may lead to catastrophic results. Bowel infarction or gangrenous bowel represents an irreversible injury to the intestine resulting from insufficient blood flow. The blockage usually occurs in one or more arteries that supply the small intestine. The radiologist plays a central role in the initial diagnosis and preventing progression to irreversible 2012 ICD-9-CM Diagnosis Code 557.9 Unspecified vascular insufficiency of intestine Short description: Vasc insuff intest NOS. sive bowel ischemia or strangulating bowel obstruction [1, 4, 5] (Fig. Intestinal Ischemia. The diagnosis may be complicated by limited history due to critical illness or mechanical ventilation. Bowel ischemia can affect a small or large intestine and can occur by any cause, which leads to intestinal blood flow reduction. An early bowel movement in these patients may represent segmental colonic contraction in response to ischemia. AGA technical review on intestinal ischemia. Signs and symptoms of acute intestinal ischemia typically include:Sudden abdominal pain that may be mild, moderate or severeAn urgent need to have a bowel movementFrequent, forceful bowel movementsAbdominal tenderness or distentionBlood in your stoolMental confusion in older adults In addition, intravenous contrast material demonstrates the presence of thrombi in the superior mesenteric artery or vein that are causing an adynamic ileus and bowel infarction, which mimics bowel obstruction at clinical examination ( , 1 ). Small intestinal ischemia is a challenging diagnosis to make, even with the combination of imaging, laboratory analysis, and physical exam. The pain is so severe that the patient begins to eat progressively less, resulting in weight loss. Mesenteric artery ischemia has two types: acute and chronic. A combination of sudden, severe, crampy, general ized abdominal pain accompanied by nausea and vomiting was the most frequent presentation in patients with ischemic bowel. Although bowel wall thickening is a common finding in cases of bowel ischaemia, the ischaemic bowel wall may also appear paper thin, particularly in cases of acute arterial occlusion . Intestinal ischemic syndrome is caused by visceral artery disease, the narrowing of the arteries that supply blood to the intestines, spleen and liver.The narrowing, in turn, is caused by atherosclerosis, hardening of the arteries due to the build up of plaque or fatty deposits that adhere to the artery wall. White CJ. As well as providing clues towards a diagnosis of ischemia, these investigations help exclude other potential diagnoses. Ischemia is a condition in which blood flow is stopped or reduced to a part of the body, which causes the part of the body to not get enough oxygen. Appl Radiol. If your doctor suspects intestinal ischemia, you may undergo several diagnostic tests, based on your signs and symptoms, including: Blood tests. The symptoms of bowel ischemia are often not specific for this condition. Diagnosis The doctor will ask about your symptoms and health history. If the heart has to work harder than usual, such as due to high blood pressure, it can cause ischemia to the heart muscle.People with a history of Acute mesenteric ischaemia may also be further subdivided into embolic, thrombotic, and venous mesenteric ischaemia. A diagnosis of ischemia was made at surgery in 24 patients. Ischemia is a serious condition and can be fatal. Bowel ischemia frequently affects the colon and is more frequently seen in the splenic flexure, descending colon and sigmoid. Further investigations are therefore necessary to confirm the diagnosis. Although there are no specific blood markers to indicate intestinal ischemia, certain general blood test results might suggest intestinal ischemia. Intestinal Ischemia - Ischemic Colitis vs Acute Mesenteric Ischemia vs Chronic Mesenteric Ischemia Acute or chronic insufficiency of blood flow to GI tract; due to systemic hypoperfusion, arterial/venous occlusion, or arterial vasospasm Can present in a variety of ways (see below); often in elderly pts or young pts with vascular disease, vasoconstrictive meds The mortality rate is 50%69% owing to the absence of specific symptoms and laboratory data, which makes early detection of this condition difficult. Intestinal ischemia is a serious condition that can cause pain and make it difficult for your intestines to work properly. Ischaemic bowel disease can be classified into three types: acute mesenteric ischaemia, chronic mesenteric ischaemia, and colonic ischaemia. Additionally, many patients demonstrated decreased Acute mesenteric ischemia (AMI) is a syndrome caused by inadequate blood flow through the mesenteric vessels, resulting in ischemia and eventual gangrene of the bowel wall. Ischemic bowel disease is caused due to restricted blood supply in the intestinal portion. Intestinal ischemia is a medical condition in which injury to the large or small intestine occurs due to not enough blood supply. Chronic bowel ischemia may lead to dehydration. The primary causes of insufficient blood flow to the intestine are diverse and include thromboembolism, nonocclusive causes, bowel The initial symptoms of ischemic colitis are abdominal cramps (mainly on the left side), and an urge to defecate, followed by bloody stools - although there is no significant loss of blood. The clinical history of abdominal pain and non-specific findings may be misleading. RESULTS. The acute form of the disease often presents with sudden severe abdominal pain and is associated with a high risk of death. The diagnosis was small bowel obstruction secondary to an internal hernia Intestinal Obstruction and Bowel Ischemia due to a Rare Left Paraduodenal Hernia: Case Report Intestinal ischemia - Diagnosis and treatment - Mayo Clinic Mesenteric ischemia can be classified as either acute or chronic. Diagnosis. ; Adhesions-- The intestine may become trapped in scar tissue (adhesions) from past surgery.This can lead to loss of blood flow if left untreated. Acute bowel ischemia (ABI) can be life threatening with high mortality rate. There are three levels of intestinal ischemia. Bowel wall enhancement patterns are quite helpful in diagnosing bowel ischemia associated with obstruction. These are just the mild symptoms. Bowel ischemia can classify as small intestine ischemia, which is commonly known as mesenteric ischemia and large intestine ischemia, which generally referred to as colonic ischemia. Diagnosis is by CT or colonoscopy. Ischemia is a serious condition and can be fatal. Although relatively rare, it is a potentially life-threatening condition. Intestinal ischemia can affect your small intestine, your large intestine (colon) or both. Diagnosis. Both arterial and venous thrombosis can be the main pathology responsible for acute mesenteric ischemia. 8). Patients being investigated for potential ischemic bowel disease should have plain x-rays and/or CT scans of the abdomen as guided by clinical findings. ings that may be aids to prospective diagnosis of intestinal ischemia. Intestinal ischemia can affect the small intestine, the large intestine (colon) or both. Embolus -- Blood clots can block one of the arteries supplying A common cause of isolated colonic ulcers is the use of nonsteroidal anti-inflammatory drugs (NSAIDs), with ulcers in the cecum and right colon. Ischemia can affect any part of the body like the heart, brain, legs, and intestines. Bowel obstruction, also known as intestinal obstruction, is a mechanical or functional obstruction of the intestines which prevents the normal movement of the products of digestion. Some common causes include:Blood clots in the arteriesClogged arteries (from having high cholesterol or peripheral artery disease)Bowel obstruction (something is stuck in the intestines)Scar tissue from surgeryTumor in the intestinesHernia The pain is diffuse, nonlocalized, and constant. Diagnosis When a person develops a bowel infarction or mesenteric ischemia, they will often suffer from diarrhea, vomiting, severe stomach pains, and J Gastrointest Surg 2005; 9:690. Mainly seen when the diagnosis is delayed (up to 10% of small bowel obstructions) and associated with high mortality. Colonic ischemia is the most frequent form of intestinal ischemia, most often affecting older adults [ 3 ]. [1] This is an uncommon medical condition, but it has a high mortality rate. The patients most commonly had postprandial pain and lost significant weight; angiography, including lateral aortography, confirmed the diagnosis. Although relatively rare, it is a potentially life-threatening condition. Its symptoms can develop gradually, say chronic or suddenly- acute. Thrombosis of the SMV without associated bowel abnormalities has been shown by CT in many asymptomatic patients. Hernia-- If the intestine moves into the wrong place or becomes tangled, it can cut off the blood flow. whirl sign reflecting rotation of bowel loops around a fixed point; Strangulation is defined as closed-loop obstruction associated with intestinal ischemia. Signs and symptoms of chronic disease develop more slowly and include abdominal pain after eating, abdominal distention, unintentional weight loss, vomiting, diarrhea, gastrointestinal bleeding, and loss of appetite. There are several possible causes of intestinal ischemia and infarction. Masses differential diagnosis Sanjeev Bhalla, Marieke Hazewinkel and Robin Smithuis Cardiothoracic Imaging Section of the Mallinckrodt Institute of Radiology, St. Louis, USA and the Radiology department the Medical Centre Alkmaar and the Rijnland Hospital, Leiderdorp, the Netherlands Either the small bowel or large bowel may be affected. Symptoms can be different based on whether your condition develops suddenly (acute) or gradually over time (chronic). This blocks blood flow in the intestine. Colonic ischaemia is the most common type Each form of intestinal ischemia requires its own plan of diagnosis and management. The first is intestinal angina, in which the patient experiences upper abdominal, usually severe, crampy pain associated with meals. This is more common in people with liver disease, cancer, or blood clotting disorders. Overall mortality is 6%, but mortality rises to 35% in patients who develop severe sepsis. The diagnosis was small bowel obstruction secondary to an internal hernia Intestinal Obstruction and Bowel Ischemia due to a Rare Left Paraduodenal Hernia: Case Report The imaging findings associated with small bowel ischemia are variable and combinations of findings may be necessary for definitive diagnosis.More specific imaging findings in patients with acute small intestine ischemia include bowel wall gas, mesenteric vessel occlusion, mesenteric venous gas, portal venous gas, or absence of bowel wall enhancement The extent of bowel ischemia or infarction is typically greater than that with embolism, extending from the duodenum to the transverse colon. Acute mesenteric ischemia is a rare life-threatening condition that accounts for approximately one in 1000 hospital admissions. Mesenteric ischemia is far more commonly acute than chronic in etiology. Mesenteric artery ischemia is a condition that restricts blood flow to your intestines. Narrowing of the veins -- The veins carrying blood away from the intestine may become blocked by blood clots. It leads to mediator release, inflammation, and ultimately infarction. Herein we describe the surgical management of 17 patients with chronic intestinal ischemia. Well examine the CT diagnosis of small bowel obstruction in more detail, dispelling Small bowel ischemia describes disorders that develop when blood flow to the small bowel is partially or completely blocked. Helical CT signs in the diagnosis of intestinal ischemia in small bowel obstruction Zalcman et al. Bowel obstructions are common and account for 20% of admissions with "surgical abdomens".Radiology is important in confirming the diagnosis and identifying the underlying cause. CT is commonly performed for clinically suspected small bowel obstruction (SBO), and sometimes for bowel obstructions already visualized on plain abdominal radiographs. Intestinal ischemia occurs when blood flow to the bowels is reduced. Signs and symptoms include abdominal pain, vomiting, bloating and not passing gas. Bowel ischemia and infarction can occur with a reduction of mesenteric blood supply without vascular occlusion, which is called nonocclusive mesenteric ischemia or infarction. Ischemic bowel disease encompasses a heterogeneous group of disorders caused by acute or chronic processes, arising from occlusive or nonocclusive etiologies, which result in decreased blood flow to the gastrointestinal tract. Your Diagnosing this condition starts with a history and physical exam. Acute mesenteric ischemia (AMI) is a syndrome caused by inadequate blood flow through the mesenteric vessels, resulting in ischemia and eventual gangrene of the bowel wall. Acute Mesenteric Ischemia often presents with sudden and severe abdominal pain . Acute small bowel ischemia is a life-threatening condition with a high mortality rate due to its lack of specific symptoms and laboratory profile, which render difficulty in establishing early diagnosis. The cause of bowel ischemia can be due to small intestinal ischemia(known as mesenteric ischemia) and large intestinal ischemia(known as colonic ischemia). Although there are no specific blood markers to indicate intestinal ischemia, certain general blood test results might suggest intestinal ischemia. With care including bowel rest and fluid replacement, most patients recover within a couple of A diagnosis of bowel obstruction should be confirmed on imaging (e.g., CT abdomen and pelvis). Symptoms of acute intestinal ischemic syndrome include: Clinical presentation of small bowel ischemia is variable, presenting with a myriad of specific or nonspecific clinical and laboratory findings. he spectrum of ischemic bowel disease comprises acute and chronic mesenteric ischemia and colon ischemia and includes arterial as well as venous disorders. Causes. It can come on suddenly, known as acute intestinal ischemia, or gradually, known as chronic intestinal ischemia. He or she will also ask about and any history of smoking, heart disease, or high cholesterol. Vomiting. What Are The Symptoms Of Intestinal Ischemia? Its symptoms can develop gradually, say chronic or suddenly- acute. Acute intestinal ischemia: fever, vomiting or nausea, blood in stool, swelling or tenderness in abdomen, forceful and frequent bowel movements, urgent urge for bowel movement, sudden pain in abdomen. Ischemic colitis is the most common form of intestinal ischemia. When it happens in the arteries to the intestine, it causes intestinal ischemia. Introduction. The etiology of acute small bowel ischemia includes occlusive forms (arterial embolism, arterial The imaging findings associated with small bowel ischemia are variable and combinations of findings may be necessary for definitive diagnosis. Missed Diagnosis of Bowel Ischemia Results in Death. Intestinal ischemia describes a variety of conditions that occur when blood flow to the intestines decreases due to a blockage, usually in an artery. The acute form of the disease often presents with sudden severe abdominal pain and is associated with a high risk of death. CT diagnosis was correct in 23 patients (96% sensitivity). Abdominal pain is out of proportion to physical findings. CT diagnosis was correct in 23 patients (96% sensitivity). Acute mesenteric ischemia (AMI) is a life-threatening condition caused by a reduction of mesenteric blood flow with bowel ischemia and eventual gangrene of the bowel wall and has extremely high rates of mortality .Early recognition of AMI can be notoriously difficult, and delayed intervention secondary to delays in diagnosis is one of the most common reasons for In some cases, intestinal ischemia is fatal. 2021/2022 ICD-10-CM Index 'I' Terms Index Terms Starting With 'I' (Ischemia, ischemic) Index Terms Starting With 'I' (Ischemia, ischemic) Daily change in bowel gas pattern is a good prognostic sign because it excludes ileus and bowel necrosis. Treatment In spite of the advances made in diagnosis and treatment of ABI, no significant change has occurred in the mortality over the past decade. In the absence of randomized controlled trials or similar forms of scientific inquiry, the The purpose of our study was to determine prospectively the value of heli-cal CT and of various signs of ischemia in the context of acute bowel obstruction. 8,10 The literature has distinguished between mesenteric ischemia and ischemic colitis in reference to ischemia of the small bowel (SMA) versus colon (IMA), respectively. Clinical presentation and diagnosis of the nonpregnant adult with suspected deep vein thrombosis of the lower extremity; Colonic ischemia; Definitions, epidemiology, and risk factors for inflammatory bowel disease; Dermatologic and ocular manifestations of inflammatory bowel disease; Endoscopic diagnosis of inflammatory bowel disease in adults Ischemia is a condition in which blood flow is stopped or reduced to a part of the body, which causes the part of the body to not get enough oxygen. Physical exam: The doctor will examine you for abdominal pain, tenderness, or other signs. This case takes place in Kansas and involves a middle-aged male patient who died from septic shock, multiorgan dysfunction syndrome, bowel perforation, and bowel ischemia/bowel infarction. The prospective CT interpretation enabled a specific diagnosis of bowel ischemia or infarction in only six of 23 patients (26%). Your healthcare provider will check your abdomen and ask you about your pain. A diagnosis of ischemia was made at surgery in 24 patients. Chronic mesenteric ischemia: diagnosis and management. It can come on suddenly, known as acute intestinal ischemia, or gradually, known as chronic intestinal ischemia. A diagnosis of ischemia was made if enhancement of the bowel wall was reduced or if at least two of the other signs were found. In severe cases, loss of blood flow to the intestines can damage intestinal tissue and possibly lead to death. If the use of contrast material is possible, biphasic contrast materialenhanced Angiography is considered the gold standard for diagnosis and is usually performed after a CT scan has shown that the abdominal pain is not caused by any other disorder that is mimicking intestinal ischemia. An Overview of Intestinal Ischemia Symptoms. Helical CT signs in the diagnosis of intestinal ischemia in small-bowel obstruction. Once chronic mesenteric ischemia is suspected, an arteriogram is used to confirm the diagnosis and to evaluate atherosclerosis inside the arteries. Blood and stool tests may be taken. Zalcman M, Sy M, Donckier V, et al. SUBJECTS AND METHODS. The symptoms of bowel obstruction are typically less severe in partial bowel obstruction than in total bowel obstruction. Mallo RD, Salem L, Lalani T, Flum DR. Computed tomography diagnosis of ischemia and complete obstruction in small bowel obstruction: a systematic review. It may be mistaken for other abdominal and gastrointestinal conditions. Ischemic bowel disease represents a broad spectrum of diseases with various clinical and radiologic manifestations, which range from localized transient ischemia to catastrophic necrosis of the gastrointestinal tract. Intestinal ischemia occurs when at least a 75% reduction in intestinal blood flow for more than 12 hours. Small intestinal ischemia is a challenging diagnosis to make, even with the combination of imaging, laboratory analysis, and physical exam. Abdominal pain after mealsWeight lossFear of eating or change in eating habits due to post-meal painNausea and/or vomitingConstipation or diarrheaHistory of cardiovascular disease (such as peripheral arterial disease, stroke, coronary artery disease or heart attack) Abdominal images may be taken. Treatment for ischemia depends on the type. Bowel ischemia is a potentially life-threatening condition caused by impaired intestinal blood flow. ISSN 2377-8369 GASTRO OpenJournal Review Decision-Making in Diagnosis and Management of Extraintestinal Manifestations of Inflammatory Bowel Disease Nicholas V. Costrini, MD, PhD, MBA, AGA-F* Borland Groover Clinic, PA, 4800 Belfort Road, Jacksonville, FL 32256, USA * Corresponding author Nicholas V. Costrini, MD, PhD, MBA, AGA-F Borland Groover Clinic, PA, 2015 Sep (appendicitis, sigmoid diverticulitis, Crohn's disease), and bile duct ischemia secondary to pancreatoduodenectomy, liver transplantation, interventional techniques (radio-frequency ablation, intra-arterial chemo-embolization), and/or liver trauma. This can be done with: X-ray CT scan A colonoscopy may be done. permitted the diagnosis of mesenteric ischemia from MVT in symptomatic individuals. Intestinal ischemia occurs when perfusion fails to meet the demands of the intestines, resulting in ischemic tissue injury that can be life-threatening if bowel necrosis and/or perforation occurs. Intestinal Ischemia in Small-Bowel Obstruction OBJECTIVE. A physical exam will be done. CT diagnosis was correct in 23 patients (96% sensitivity). This type of bowel ischemia accounts for 2030% of all acute mesenteric ischemia or infarction cases, with mortality rates from 30% to 93% [3, 41, 42]. Diagnosis. Secondary peritonitis accounts for 1% of urgent or emergent hospital admissions and is the second leading cause of sepsis in patients in intensive care units globally. Ischemic bowel disease represents a broad spectrum of diseases with various clinical and radiologic manifestations, which range from localized transient ischemia to catastrophic necrosis of the gastrointestinal tract. A long, flexible tube will be inserted through the rectum to inspect the intestines. ings that may be aids to prospective diagnosis of intestinal ischemia. Intestinal Ischemia Presentation and Diagnosis. ICD-9-CM 557.9 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 557.9 should only be used for claims with a date of service on or before September 30, 2015. The clinical presentation is variable and nonspecific, so it is often misdiagnosed. These patients may exhibit non-specific signs and symptoms such as vomiting, nausea, and leukocytosis. Mesenteric ischemia, also commonly referred to as bowel or intestinal ischemia , refers to vascular compromise of the bowel and its mesentery that in the acute setting has a very high mortality if not treated expediently. The clinical scenario of a patient complaining of excruciating abdominal pain with an unrevealing abdominal exam is classic for early AMI [].If the physical exam demonstrates signs of peritonitis, there is likely irreversible intestinal ischemia with bowel necrosis. Colonic ischaemia is the most common type and has the most favourable prognosis. A diagnosis of ischemia was made if enhancement of the bowel wall was reduced or if at least two of the other signs were found. Spectral CT enabled us to diagnose bowel ischemia with a very high degree of confidence and provide precise guidance to the surgeons, who would find 20cm of devascularized bowel about 20cm upstream from the ileocecal valve. Ischemic colitis (IC) is an inflammatory condition of the large intestine, or colon. Note that acute mesenteric ischemia is distinct from ischemic colitis Ischemic Colitis Ischemic colitis is a transient reduction in blood flow to the colon. A diagnosis of ischemia was made at surgery in 24 patients. Decreased segmental enhancement was the most specific sign for small-bowel ischemia (P = .001), and its recognition would have improved the diagnostic performance of all readers. General: Small bowel ischemia is an uncommon vascular disease resulting in not enough blood supply to the intestines. The IQon Spectral CT in the Diagnosis of Bowel Ischemia. Chronic bowel ischemia causes bloating, diarrhea and weight loss. It is mostly due to a low flow state like hypovolemic shock or congestive heart failure. Acute intestinal ischemia: fever, vomiting or nausea, blood in stool, swelling or tenderness in abdomen, forceful and frequent bowel movements, urgent urge for bowel movement, sudden pain in abdomen. Features are non-specific and include: For the diagnosis of chronic mesenteric ischaemia, angiography needs to demonstrate severe occlusion of at least 2 of the 3 splanchnic vessels, although in the absence of symptoms an abnormal angiography result alone is not sufficient for diagnosis. Brandt LJ, Boley SJ. Differentiating Mesenteric Ischemia from other Diseases. Hepatic abscess: Diagnosis and management J Visc Surg. Intestinal ischemia is a serious condition caused by reduced blood flow to part of the intestine. Severe abdominal pain (main symptom). It is important to differentiate ischemic colitis, which often resolves on its own, from the more immediately life-threatening condition of acute mesenteric ischemia of the small bowel . Ischemic bowel disease (ISBODI) is the most common vascular disorder of the gastrointestinal tract. Treatment is supportive with IV fluids, bowel rest, and antibiotics. The journal presents original contributions as well as a complete international abstracts section and other special departments to provide the most current source of information and references in pediatric surgery.The journal is based on the need to improve the surgical care of infants and children, not only through advances in physiology, pathology and ISBODI results from inadequate supply Sometimes a CT-angiogram, which is a non-invasive way of studying the intestine and its blood vessels, obviates the need for a formal angiographic study.

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bowel ischemia: diagnosis