Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0022116 (ischemia)
 91,303 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Jejunostomy is a surgical procedure by which a tube is situated in the lumen of the proximal jejunum, primarily to administer nutrition. There are many techniques used for jejunostomy: longitudinal Witzel, transverse Witzel, open gastrojejunostomy, needle catheter technique, percutaneous endoscopy, and laparoscopy. The principal indication for a jejunostomy is as an additional procedure during major surgery of the upper digestive tract, where irrespective of the pathology or surgical procedures of the esophagus, stomach, duodenum, pancreas, liver, and biliary tracts, nutrition can be infused at the level of the jejunum. It is also used in laparotomy patients in whom a complicated postoperatory recovery is expected, those with a prolonged fasting period, those in a hypercatabolic state, or those who will subsequently need chemotherapy or radiotherapy. As a sole procedure it is advised for neurologic and congenital illnesses, in geriatric patients who pose difficult care demands, and for patients with tumors of the head and neck. The complications seen with jejunostomy can be mechanical, infectious, gastrointestinal, or metabolic. The rate of technical complications of the Witzel longitudinal technique is 2.1%, for the transverse Witzel up to 6.6%, for the Roux-en-Y 21%, for open gastrojejunostomy from 2%, and for the needle catheter technique from 1.5% with 0.14% mortality. The percutaneous endoscopic procedures have as much as a 12% complication rate; no figures exist for laparoscopy. The complications are moderate and severe: tube dislocation, obstruction or migration of the tube, cutaneous or intraabdominal abscesses, enterocutaneous fistulas, pneumatosis, occlusion, and intestinal ischemia. The infectious complications are aspiration pneumonia and contamination of the diet. The gastrointestinal complications are diarrhea 2.3% to 6.8%, abdominal distension, colic, constipation, nausea, and vomiting. The metabolic complications are hyperglycemia 29%, hypokalemia 50%, water and electrolyte imbalance, hypophosphatemia, and hypomagnesemia. These complications are secondary to inadequate selection of nutrition relative to the characteristics of the patient, to inadequate management of the mixture, and to deficient clinical care. The ideal jejunostomy technique depends on the material resources but more importantly on the experience of the surgeon. The benefits of jejunostomy justify the risks.
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PMID:Jejunostomy: techniques, indications, and complications. 1022 30

Irritable bowel syndrome (IBS) is one of the most common entities observed by both primary care physicians and gastroenterologists. Alosetron is a potent and selective serotonin antagonist that recently became the first Food and Drug Administration-approved agent for diarrhea-predominant IBS. However, since approval, significant side effects have been noted with the use of alosetron including severe constipation, fecal impaction, and ischemic colitis. We describe a case of ischemic colitis in a male patient with IBS who was briefly treated with alosetron. Clinical, endoscopic, and pathologic features of the focal colitis strongly suggested ischemia. Symptoms correlated temporally with alosetron use, and symptoms abated with discontinuation of the drug. Endoscopic and pathologic resolution of the colitis were documented.
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PMID:Ischemic colitis during treatment with alosetron. 1144 89

Endogenous adenosine acts at pre- or postsynaptic A1, A2, or A3 receptors to inhibit synaptic transmission in intrinsic primary afferent/AH neurons, S neurons, and mucosal and motility reflexes. Adenosine provides dual modulation of adenylyl cyclases. Its modulation of sensory transmission may be of therapeutic potential in gut inflammation, ischemia, and constipation.
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PMID:Unlocking mysteries of gut sensory transmission: is adenosine the key? 1157 21

Diagnosis of chronic anal fissure is easy and common in clinical practice. Little is known about the etiology and pathogenesis of this disorder. Current investigations consider anal sphincteric hypertonia and ischemia as primary factors in the appearance and maintenance of this lesion. Recurrence rate after healing is high, so anal fissure may be a chronic disease that evolves depending on sphincteric features. Conservative measures to avoid constipation, including fiber intake, are useful to improve symptomatology, achieve healing, and reduce recurrence. Surgical treatment is the most effective procedure for chronic anal fissure. Lateral internal sphincterotomy achieves healing in most cases (more than 95%) and the recurrence rate is low (1% to 3%). However, permanent fecal incontinence may appear after surgery and available data about this complication are controversial. In recent years, chemical sphincterotomy has been developed as an option in the treatment of chronic anal fissure. This medical option aims to achieve the effectiveness of surgery without side effects, by means of a temporary decrease of anal pressures that allows fissures to heal. Local injection of botulinum toxin into the anal sphincter is the most successful medical option, nearly as effective as surgery and without significant adverse effects (transitory episodes of mild fecal incontinence). Although more studies are needed to establish the method of administering this treatment, in our opinion botulinum toxin is an effective option in a high percentage of cases, especially in patients who risk developing incontinence. Compared with botulinum toxin, topical nitroglycerine ointments, which produce a transitory sphincteric relaxation, have the advantage of being a simple and accessible procedure. However, we think that this option should not be a first choice because its effectiveness is lower compared with surgery (about 60% to 70%), its compliance with the application could be poor, and it has a greater percentage of side effects (eg, headache). Other topical treatments (eg, calcium channel antagonist or cholinergic agonists agents) appear to be as effective as nitroglycerine agents and do not have significant adverse effects, but little data exist about these options. In our opinion, treatment of chronic anal fissure must be individualized, depending on the clinical profile of patients. Medical treatment, especially injection of botulinum toxin, should be taken into account if risk for developing incontinence is suspected.
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PMID:Chronic Anal Fissure. 1274 25

We report here a boy with infantile-onset fibromuscular dysplasia (FMD). At 8 months of age, he had the first cerebrovascular attack presenting with left facial palsy, followed by recurrent attacks of alternating hemiparesis. Involvement of systemic arteries was manifested by variable somatic symptoms: retarded growth of the right arm due to stenosis of the brachial artery, constipation and recurrent abdominal pain due to intestinal ischemia, and renovascular hypertension. Cerebral angiography disclosed stenosis of the bilateral internal carotid arteries and right vertebral artery, with development of moyamoya disease like collateral vessels. Systemic arteriography revealed stenosis of the right brachial and left femoral arteries, which was either tubular or mimicking a string of beads. This case was characterized by the early onset and involvement of many cerebral and systemic arteries resulting in severe and variable symptoms.
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PMID:[A boy with infantile-onset fibromuscular dysplasia showing recurrent cerebrovascular attacks]. 1275 58

Proctitis refers to inflammation of the rectum, a diagnosis made by endoscopic evaluation. Symptoms of proctitis include rectal bleeding, urgency, tenesmus, diarrhea or constipation, and occasionally rectal pain. The causes of proctitis include infection, medication, ischemia, radiation, and ulcerative proctitis. Ulcerative proctitis is an important and increasingly common subcategory of ulcerative colitis (UC) in which inflammation is limited to the rectum. Historically, oral aminosalicylates have been the mainstay of acute and maintenance therapy. A growing body of data, however, indicates that topical aminosalicylates are effective first line agents in ulcerative proctitis and distal UC. Topical aminosalicylates act more effectively and rapidly to induce and maintain remission compared with their oral counterparts or topical steroids. Rarely ulcerative proctitis is refractory to topical therapy and in these instances systemic corticosteroids, antibiotics, immunomodulators, or surgery is required. This review highlights the pathogenesis, diagnosis, and treatment of ulcerative proctitis.
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PMID:Diagnosis and treatment of ulcerative proctitis. 1536 96

This is the unusual case of a 17-year-old girl affected by Rett Syndrome (RS) who suffered acute abdominal distension and constipation for a week. Laparotomy showed massive gastric dilatation, with total necrosis and perforation. Total gastrectomy and Y-Roux esophagojejunostomy were performed. We believe the clinical status was caused by the mechanism of air swallowing, present in our patient and typical in RS. In fact, as reported, massive air bloat may result in a decrease of the intramural blood flow with consequential ischemia of the gastric wall. We stress the importance of early detection of the gastroenterological symptoms in these patients, with timely positioning of nasogastric tube and gastrostomy, to prevent serious complications potentially life-threatening as massive gastric necrosis.
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PMID:A case of massive gastric necrosis in a young girl with Rett Syndrome. 1616 97

Drugs such as alosetron that modulate serotonin effects by stimulating or blocking its receptors may play an important role in the treatment of some patients with irritable bowel system. In the case of alosetron, a 5HT-3 antagonist, an analysis of data from randomized clinical trials and postmarketing experiences have demonstrated a causal relationship between this drug and ischemic colitis and serious complications of constipation. Because the mechanism(s) of drug-induced ischemic colitis and possibly other forms of intestinal ischemia associated with alosetron have not been elucidated, there is need to further assess risk with regard to patient susceptibility and other factors.
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PMID:Alosetron: ischemic colitis and serious complications of constipation. 1660 52

Intestinal pseudo-obstruction is a rare motility disorder with symptoms and clinical signs of bowel obstruction without a mechanical cause. Symptoms might be acute or chronic. The pathogenesis of acute colonic pseudo-obstruction (Ogilvie's syndrome) is likely to result from an imbalance of the autonomic regulation of the colon. Chronic intestinal pseudo-obstruction (CIPO) may be congenital or acquired. A variety of underlying pathologies, e.g. visceral neuropathy or visceral myopathy are known. Main symptoms are abdominal pain, vomiting, constipation or diarrhoea. Mechanical obstruction, ischemia and perforation should be excluded. Supportive therapy, medical therapy or an intervention (endoscopy, surgery) might be necessary in Ogilvie's syndrome depending on ceacal diameter and duration of distension. Treatment of CIPO depends on the severity of the disease and often needs a multidisciplinary approach.
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PMID:[Intestinal pseudo-obstruction]. 1766 8

Constipation with faecal impaction is a common condition, which may lead to serious potential complications. Among such complications, stercoral perforation has been rarely reported in the literature. We report a single case of 75-year-old woman, with a massive faecal impaction, which resulted in a rectum perforation, presented as a pneumoperitoneum, pneumomediastinum and subcutaneous emphysema. We present this case to remind physicians that neglected accumulation of faecal matter in the rectum may lead to ischemia and perforation of the colon and rectum. This case illustrates that severe chronic constipation requires adequate management, including disimpaction and aggressive medical treatment. Appropriate operative treatment may be life-saving.
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PMID:Giant faecaloma causing perforation of the rectum presented as a subcutaneous emphysema, pneumoperitoneum and pneumomediastinum: a case report. 1796 2


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