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Loss of excretory function in acute renal failure results in the retention of catabolites and fluid. In the absence of available carbohydrate, endogenous fat and protein become the main caloric sources. This results in the rapid accumulation of keto acids and nitrogenous wastes. By providing readily available non-nitrogenous calories, protein catabolism is reduced, complete oxidation of fat is obtained and energy is provided to drive potassium into the intracellular compartment. The patient should be encouraged to eat despite his apathy, fear of vomiting and characteristically paranoid mood. Tube or parenteral feeding is complicated by the need to restrict fluid. Numerous small feedings are more successful than large meals. Hard candy and alcohol are often acceptable sources of calories, fat emulsions seldom. Oral hygiene aids feeding, and tranquilizers and anticholinergics are useful. If the patient does not take food by mouth, tube feeding may be carried out. Because of the bleeding tendency so often occurring in uremia, tube feeding may be contraindicated if it causes erosion of the pharynx or esophagus. Intravenous infusion of invert sugar, glucose and alcohol may be necessary if nutrition cannot be accomplished by other means.
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PMID:Importance of caloric intake during renal failure. 1358 43

Metformin belongs to a class of drugs known as the biguanides that are widely used in the treatment of type 2 diabetes mellitus. Its association with lactic acidosis is well established, although rare. Metformin-associated lactic acidosis is recognized as a potentially lethal condition that can occur in patients with contraindications to the drug, such as renal dysfunction, liver diseases, alcoholism, and cardiopulmonary diseases. In these cases, the plasma concentration of metformin is not necessarily abnormally high. We describe a 75-year-old diabetic woman with acute renal failure and life-threatening lactic acidosis due to metformin intoxication. Clinical manifestations included vomiting, diarrhea, hypothermia, hypotension and transitory blindness. Her initial renal function was recovered after hemodialysis and she was discharged 3 months after admission.
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PMID:Metformin-associated lactic acidosis and acute renal failure in a type 2 diabetic patient. 1460 17

Familial renal hypouricemia with exercise-induced acute renal failure (ARF) is rare. A 45-year-old man presented with abdominal pain, vomiting, and oliguria after severe exercise. The diagnosis was ARF based on high serum creatinine (SCr) level (5.1 mg/dL [451 micromol/L]). Renal function recovered completely within 2 weeks of conservative treatment (creatinine clearance [Ccr], 100.4 mL/min [1.67 mL/s]). After remission, laboratory results showed serum urate (SUA) of 0.8 mg/dL (48 micromol/L), and fractional excretion of uric acid (FE(UA)) of 46%. The final diagnosis was ARF associated with idiopathic renal hypouricemia. Other diseases that could increase the excretion of urate were excluded. Because only mild responses were observed both in pyradinamide and benzbromarone loading tests, he was considered to be a presecretory reabsorption disorder type. The younger brother (42 years old) also had episodes of low and middle back pain after severe exercise and experienced similar attacks at least 5 times since the age of 29. SCr level was elevated in every attack. Hypouricemia (SUA, 1.0 mg/dL [59 micromol/L]) and high urinary urate excretion (FE(UA), 65.7%) also were detected. Renal function recovered almost completely without any specific treatment. Radiologic examination of the 2 cases showed bilateral urolithiasis probably caused by the high urinary urate excretion. Sequence analysis of a urate anion exchanger known to regulate blood urate level (URAT1 gene) in both brothers showed homozygous mutation in exon 4 (W258Stop), resulting in a premature truncated URAT1 protein. Both their parents and their children showed heterozygous mutation of the URAT1 gene. This is the first report of the 2 male siblings of familial renal hypouricemia complicated with exercise-induced ARF, with definite demonstration of genetic abnormality in the responsible gene (URAT1).
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PMID:Two male siblings with hereditary renal hypouricemia and exercise-induced ARF. 1465 3

A 67-year-old white woman developed severe nausea, vomiting, diffuse abdominal cramping pain, and blurred vision followed by a syncopal episode after taking 1 tablet of quinine for leg cramps. Examination was significant for fever, elevated blood pressure, and confusion without any focal neurological deficits. Laboratory studies showed markedly elevated liver enzymes, elevated lactate dehydrogenase, anemia, thrombocytopenia, and acute renal failure. Peripheral smear showed many schistocytes and burr cells. She later recalled taking quinine more than 40 years before while on a trip to the Philippines. The patient was treated with 7 sessions of plasmapheresis with a rapid normalization of her hematological parameters. Three weeks of dialysis support were required before return of renal function to baseline. Re-exposure to quinine can cause a rapid onset of hemolytic uremic syndrome-like syndrome. We are not aware of any cases of hemolytic uremic syndrome-thrombotic thrombocytopenic purpura in response to re-exposure to a single tablet of the drug 40 years after first use.
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PMID:Quinine induced HUS-TTP: an unusual presentation. 1467 3

Hyperamylasemia has been reported in more than 65% of patients with severe leptospirosis, and the true diagnosis of acute pancreatitis is complicated by the fact that renal failure can increase serum amylase levels. Based on these data we retrospectively analyzed the clinical and histopathological features of pancreas involvement in 13 cases of fatal human leptospirosis. The most common signs and symptoms presented at admission were fever, chills, vomiting, myalgia, dehydratation, abdominal pain and diarrhea. Trombocytopenia was evident in 11 patients. Mild increased of AST and ALT levels was seen in 9 patients. Hyperamylasemia was recorded in every patient in whom it was measured, with values above 180 IU/L (3 cases). All patients presented acute renal failure and five have been submitted to dialytic treatment. The main cause of death was acute respiratory failure due to pulmonary hemorrhage. Pancreas fragments were collected for histological study and fat necrosis was the criterion used to classify acute pancreatitis. Histological pancreatic findings were edema, mild inflammatory infiltrate of lymphocytes, hemorrhage, congestion, fat necrosis and calcification. All the patients infected with severe form of leptospirosis who develop abdominal pain should raise the suspect of pancreatic involvement.
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PMID:Pancreatic involvement in fatal human leptospirosis: clinical and histopathological features. 1476 28

The authors present the case reports of a 30-year-old man and his 29-year-old wife who ingested a mushroom meal containing Cortinarius speciosissimus. Features of this intoxication include gastrointestinal symptoms such as nausea, vomiting, and diarrhea as well as back pain. The toxin orellanine is nephrotoxic and can lead to acute renal failure. A long symptom-free interval of 2 to 21 days is characteristic of this poisoning. The diagnosis can be made by mycologic testing or by toxicologic analysis of a renal biopsy specimen. Reported therapeutic options include hemodialysis, plasmapheresis, or drug therapy with corticosteroids, all of which have yielded variable results. Here the authors report the use of antioxidant therapy in 2 patients with acute renal failure caused by Cortinarius speciosissimus intoxication.
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PMID:Treatment of intoxication with Cortinarius speciosissimus using an antioxidant therapy. 1504 64

Acute renal failure was diagnosed in a German Short Haired Pointer bitch and a Kelpie cross-bred dog following envenomation by Bull ants. Both dogs had been tethered over a Bull ant nest and had experienced mass envenomation. There was local reaction at the envenomation sites and each dog had experienced vomiting that was poorly controlled by symptomatic therapy. Intensive treatment of renal failure was successful in the German Short Haired Pointer and the bitch remains well 19 months after envenomation. The Kelpie cross-bred deteriorated despite intensive treatment and was euthanased 36 hours after presentation. Necropsy examination revealed haemorrhage and necrosis of the small intestine and myocardium, bilateral nephrosis with tubular necrosis, and patchy haemorrhage of the lung alveoli, pancreas and adrenal cortices. Electron microscopy revealed necrosis of the small intestine and hydropic swelling of proximal renal tubules with necrosis of medullary tubules.
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PMID:Acute renal failure following Bull ant mass envenomation in two dogs. 1508 57

Rifampicin re-administration may cause immunologically mediated acute tubulo-interstitial injury. Retrospectively, 170 consecutive cases with acute renal failure (ARF) following re-treatment with rifampicin (71% males, 29% females, age 21 to 68 years) were analysed, which accounted for 12% of all ARF patients treated by two large dialysis referral centres in Romania, Timisoara and Iasi, between 1974-2001 and 1988-2001, respectively. The most frequent clinical features of rifampicin-induced ARF were: Anuria, gastro-intestinal (abdominal pain, nausea, vomiting and diarrhoea) and "flu-like" symptoms. Urine analysis revealed sterile leucocyturia in 54%, proteinuria in 31%, haematuria in 26% and haemoglobinuria in 7% of cases. Haemolytic anaemia was frequent, found in 66% of the patients; half of these had Hct values of < 30%, thrombocytopenia and also more severe renal damage (a longer anuric phase and a slower recovery of the renal function), thus suggesting a severe multi-target autoimmune aggression. The association of hepatic injury--not explained by prior hepatic disease, B or C hepatitis virus infection or history of alcohol abuse--was encountered in 17% of the cases, without a significant influence on the renal and the general outcome. The outcome of rifampicin-induced ARF is generally favourable, with complete recovery of the renal function within 30 days in 52% of the cases and within 90 days in 92% of the cases. The mortality rate was 3.5%, compared to 21% for the overall ARF population treated during the same period (p < 0.05).
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PMID:A clinical description of rifampicin-induced acute renal failure in 170 consecutive cases. 1519 54

A 24-year-old woman with a history of penicillin allergy developed reversible acute renal failure after receiving cephalexin for 4 days. The patient experienced nausea, vomiting, diarrhea, pruritus, cough, and an elevated creatinine level of 2.2 mg/dl. The patient's creatinine level continued to rise, peaking at 5.3 mg/dl on hospital day 3. Nephrotoxic acute tubular necrosis was confirmed by electron microscopy. Within 1 month of discharge from the hospital, the patient's creatinine level decreased to 0.6 mg/dl. Although the renal injury most commonly associated with the cephalosporin class of antibiotics is allergic interstitial nephritis, currently available cephalosporins infrequently can cause direct tubular toxicity.
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PMID:Cephalexin-induced acute tubular necrosis. 1522 73

Renal failure remains a serious cause of mortality in Yemen. Our region has 1.25 million population and our hospital is the central hospital, which has a nephrology department and performs dialysis for the region. Between January 1998 and December 2002, we admitted 547 patients; including children, with acute renal failure (ARF) and chronic renal failure (CRF). CRF was observed in 400 patients, an incidence of 64 per million per year and a prevalence of 320 per million. ARF occurred in 147 persons with an incidence of 23.5 per million per year and a prevalence of 117.5 patients per million. Of all patients, 72% were adults (age range, 20-60 years) with a male preponderance. As a tropical country, malaria (27.9%), diarrhea (13.6%), and other infectious diseases were the main causes. Next most common were obstructive diseases causing CRF and ARF (26.8% and 12.9%, respectively), mainly urolithiasis, Schistosomiasis, and prostatic enlargement. However the cause of CRF in 57.5% of patients was unknown as most persons presented late with end-stage disease (64.7%), requiring immediate intervention. Other causes, such as hepatorenal syndrome, snake bite, diabetes mellitus, and hypertension, showed low occurrence rates. Patients presented to the hospital mostly in severe uremia and without a clear history of prior medications. The major findings were vomiting, acidosis, and hypertension with serum creatinine values ranging between 2.8-45 mg/dL (mean value, 13.4 mg/dL). Anemia was observed in 80.4% of CRF versus 62.6% of ARF patients. Hypertension prevalence was 65.5% among CRF patients, of whom 25% were in hypertensive crisis, whereas among ARF the prevalence was only 26.5%.
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PMID:Renal failure in Yemen. 1535 Apr 75


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