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Acute renal failure (ARF) is a common problem in intensive care medicine. Even modest degrees of ARF not requiring dialysis treatment increase the risk of death approximately fivefold. Despite the widespread appreciation of the role of nephrotoxic drugs in their contribution to ARF, these drugs continue to have an ongoing aetiological role. Potentially nephrotoxic drugs include non-steroidal anti-inflammatory drugs, radiocontrast agents, antimicrobial and anaesthetic agents. Endogenous compounds such as myoglobin and haemoglobin may furthermore cause toxic nephropathy. Tubular injury initiated by toxins often results from a combination of acute renal vasoconstriction and direct cellular toxicity due to intracellular accumulation of the toxin, or, alternatively, may be mediated immunologically in case of interstitial nephritis. Patients with reduced renal functional reserve, cardiovascular co-morbidity, diabetes mellitus, and advanced age are at increased risk. Awareness of the range of toxins on the one hand and simple measures such as adequate pre-hydration of the patient and drug monitoring on the other hand may be sufficient to avoid drug-induced ARF or minimize its clinical severity in susceptible patients.
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PMID:Acute toxic renal failure. 1476 Aug 73

The rate of decline of renal function (RDRF) in the pre-end stage renal disease setting (pre-ESRD) is highly variable. Several factors have been involved as potential modifiers of renal failure progression. This retrospective study attempts to establish which were the main determinants of the RDRF in pre-ESRD patients followed in the predialysis consult. The study group consisted of 230 patients with pre-ESRD not yet on dialysis who were referred to the predialysis consult from January 1998 to July 2002. The mean follow-up time per patient was 356 days. RDRF was assessed as delta of the average of creatinine and urea clearances (CrCl-UCl). Data obtained at time of referral to the predialysis consult were analyzed as potential predictors of the subsequent RDRF. These independent variables included: demographics, comorbid conditions, main hematological and biochemical data, antihypertensive and statin treatment, mean blood pressure, and CrCl-UCl at time of referral. The predictors of delta CrCl-UCl were determined by multiple linear regression analysis. The determinants of the survival without dialysis were established by the Cox regression hazard model, adjusted to renal function at time of referral. Mean CrCl-UCl at time of referral was 10.98 +/- 2.58 ml/min/1.73 m2, and mean delta CrCl-UCl was -0.37 +/- 0.46 ml/min/1.73 m2/month. Patients with diabetic nephropathy and chronic glomerulonephritis had the fastest RDRF, while patients with ischemic nephropathy and chronic interstitial nephritis had the slowest RDRF. Seventy-five patients (46%) required EPO therapy. The best determinants of delta CrCl-UCl were: the 24-hour proteinuria (p < 0.0001), and the hematocrit at time of referral (p = 0.0024). The best determinants of the survival rate without dialysis during the study period were: the proteinuria (in g/24 hours) (R 1, 16; p < 0.0001), the hematocrit at time of referral (OR: 0.88; p < 0.0001), the treatment with EPO (OR: 0.59; p = 0.02), and the diagnosis of diabetes mellitus (OR: 1.59; p = 0.01). In conclusion, apart from the rate of proteinuria, which could represent the best marker of the RDRF in chronic renal diseases, the development of anemia was associated with faster decline in renal function.
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PMID:[Progression of renal insufficiency in the pre-end-stage renal disease setting]. 1500 86

This study shows that in The Netherlands there is a changing pattern in incidence of renal replacement therapy over time when adjusted for age and sex. There has been an almost linear increase in crude incidence rates during four decades. However, unlike the situation elsewhere in the Western world, a flattening of the curve has been observed during the last six years. The growing incidence of end-stage renal disease (ESRD) due to especially hypertensive renovascular disease and diabetes mellitus type 2 has been neutralized by a decrease in ESRD due to glomerulonephritis, urologic interstitial nephritis, and diabetes mellitus type 1. The latter observations suggest that renoprotective interventions can be successful on a population level, and thus, provide hope for the future. To battle the increase in ESRD due to atherosclerosis and diabetes mellitus type 2-related renal disease, it is important that screening programs are being developed that enable us to identify in an early phase patients at risk for development of ESRD who may benefit from preventive strategies. Population screening for albuminuria will be helpful in this respect.
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PMID:Trends in the incidence of treated end-stage renal failure in The Netherlands: hope for the future? 1548 25

Human immunodeficiency virus (HIV)-associated nephropathy (HIVAN) is the most common finding on renal biopsy in HIV-infected black patients and is also the commonest cause of end-stage renal disease in these patients. Early detection of HIVAN may be beneficial in evaluating early treatment. This study examined the pattern of renal diseases in HIV-infected South Africans and also attempted to diagnose HIVAN at an early stage. In this single-center cross-sectional study, 615 HIV-infected patients were screened for proteinuria. Thirty patients with varying degrees of proteinuria underwent renal biopsy. Patients with diabetes mellitus, uncontrolled hypertension, known causes of chronic kidney disease, and serum creatinine above 250 mumol/l were excluded. Patients in this study were not on antiretroviral therapy. HIVAN was found in 25 (83%) patients. Six of them (24%) had microalbuminuria. Altogether, seven patients with persistent microalbuminuria were biopsied and six (86%) showed HIVAN. Other biopsy findings included membranoproliferative nephropathy in two (7%) and interstitial nephritis in three (10%). Four patients with HIVAN had associated membranous nephropathy. HIVAN is the commonest biopsy finding among our study patients with HIV infection who present with varying degrees of proteinuria. Microalbuminuria is a manifestation of HIVAN in our study patients. Therefore, microalbuminuria may be an early marker of HIVAN, and screening for its presence may be beneficial. Renal biopsy may be considered in seropositive patients who present with persistent microalbuminuria, especially with low CD4 counts irrespective of good renal function. This will allow diagnosis and treatment of HIVAN at an early stage and may prevent further disease progression.
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PMID:A cross-sectional study of HIV-seropositive patients with varying degrees of proteinuria in South Africa. 1667 14

The aim of this study was to describe the clinical spectrum of chronic renal failure (CRF) in the elderly. The diagnosis of CRF was made using standard clinical criteria. The elderly was defined as person with over 60 years of age. In total, 200 elderly patients with CRF were evaluated between July 2002 and February 2004. Their age (male: 146; female: 54) ranged between 60 and 90 (mean 64.31+/-4.18) years. Diabetic nephropathy was the most common (46%) cause of CRF. Hypertensive nephrosclerosis, chronic interstitial nephritis and obstructive uropathy were responsible for CRF in 18%, 14% and 13% of patients, respectively. We observed chronic glomerulonephritis in 7% of elderly CRF. Urinary tract infection (55.5%), hypovolemia (22.2%), accelerated hypertension (11.1%) and sepsis (11.1%) were responsible for acute exacerbation of renal failure in 36 (18%) patients. Associated co-morbid conditions were noted in 93 (46.5%) patients. They included; coronary artery disease 46 (49.46%), cerebrovascular disease 20 (21.50%), osteoarthritis 13 (13.97%), chronic obstructive pulmonary disease 6 (6.45%), dilated cardiomyopathy 5 (5.37%), and malignancy in 3 (3.22%) patients. Acute dialytic support was required in 164 (82%) cases and remaining 36 (18%) patients received conservative management. Mortality was noted in 25 (12.5%) cases. The coronary artery disease (48%), acute pulmonary edema (20%) and hyperkalemia (12%) were the main causes of death. Subsequent evaluation revealed that 102 (51%) patients had ESRD of which only 3 (2.94%) patients could afford CAPD. A total of 11 (10.7%) patients underwent chronic maintenance hemodialysis for 3-4 months and then discontinue dialysis mainly because of financial constraints. Remaining 88 (86.27 %) patients with ESRD were discharged from hospital after symptomatic improvement with acute dialysis. Thus, diabetic nephropathy related to type-2 diabetes was the commonest cause of CRF in our elderly patients. Chronic renal failure in elderly was associated with a number of co-morbid conditions, which contributed significantly to morbidity and mortality. Acute on chronic renal failure with severe uremic complications were an important cause of hospitalization. The financial constraint was the major limiting factor for the management of elderly ESRD patients.
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PMID:Clinical spectrum of chronic renal failure in the elderly: a hospital based study from eastern India. 1709 77

Chronic renal failure (CRF) is a major public health problem. Early diagnosis and proper management have important roles in prevention of CRF progression to end-stage renal disease (ESRD). For this purpose, determining the etiology of CRF may be helpful. This study was conducted in the nephrology department at the Mostafa Khomeini Hospital in Tehran, Iran from March 2001 to March 2005, to determine the etiology of CRF in adult Iranian patients. A total of 1200 patients with a diagnosis of CRF were involved in the study. Relevant data were collected using a reliable questionnaire. All data analyses were carried out using SPSS and the chi2 test. Of the 1200 patients, 61% were males and 39% females. The most frequent age group was 61-75 years (38.3%) and the mean age of the study patients was 51.6 +/- 17 years. The etiology of CRF in our series included: diabetes mellitus in 26.8%, hypertension in 13.5%, obstructive uropathy in 12%, cystic and congenital disorders in 10.3%, glomerulonephritis in 6.5%, urinary tract infections in 4%, vasculitis in 2%, tubulo-interstitial nephritis and pregnancy related in 0.8% each and unknown causes in 29.5% of the patients. Laboratory and ultrasonographic assessment at initiation of the study revealed blood urea nitrogen> 100 mg/dl in 57.8% of the patients, serum creatinine> 10 mg/dl in 40.3%, glomerular filtration rate (GFR) < 10 ml/min in 61.3%, hemoglobin < 10 g/dl in 65.8% and kidney size lesser than 8 cm in 46% of the cases. There was a significant statistical relationship between kidney size and duration of hypertension greater than five years (P = 0.017). The high frequency of CRF of unknown etiology in this study may be attributed to diagnostic limitations prevailing in our country. A GFR of < 10 ml/min in 61.3% of the cases at presentation suggests late diagnosis and/or referral. Aggressive screening and treatment strategies to prevent ESRD are recommended.
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PMID:Epidemiology of chronic renal failure in Iran: a four year single- center experience. 1749 93

We report what we believe to be the first two cases of acute interstitial nephritis associated with vancomycin and ceftriaxone therapy in adults. A 40-year-old man with a medical history of traumatic brain injury and tonic-clonic seizure disorder was admitted to the hospital with a seizure episode and temperature of 103 degrees F. He was administered ceftriaxone, vancomycin, and acyclovir for suspected bacterial and/or viral meningitis. On day 4, the patient was noted to have diffuse erythematous plaques on the neck, chest, arms, abdomen, and back, as well as an elevated serum creatinine level of 3.1 mg/dl (baseline 0.9 mg/dl) and an elevated eosinophil count (6%). Dermatology and renal consultations were obtained, and a diagnosis of suspected acute interstitial nephritis was made. After a 3-day course of antibiotic treatment (day 4 of hospitalization), all antibiotics were discontinued and topical triamcinolone 0.1% ointment and hydrocortisone 2.5% cream were begun for the rash. The patient was discharged 5 days later with improvement in the rash, serum creatinine level (1.0 mg/dl), and eosinophil count (0.9%). A 59-year-old woman with a medical history of diabetes mellitus was admitted to the hospital with a serum creatinine level of 3.7 mg/dl, eosinophil count of 8.4%, and fractional excretion of sodium of 2.94%. The patient had been receiving treatment with vancomycin and ceftriaxone for osteomyelitis for 28 days before this hospital admission. Her baseline serum creatinine level (before antibiotic therapy) was 1.0 mg/dl. Renal consultation was obtained, and a diagnosis of probable acute interstitial nephritis was made. Ceftriaxone and vancomycin were discontinued, and her serum creatinine level gradually decreased to 3.3 mg/dl and then further to 1.5 mg/dl over the next 3 months. Use of the Naranjo adverse drug reaction probability scale revealed that the adverse reaction was possible in the first case and probable in the second case. Health care professionals need to be cognizant that drug-induced acute interstitial nephritis can be associated with concomitant administration of ceftriaxone and vancomycin therapy. Early detection of this rare adverse reaction is paramount in order to prevent acute renal insufficiency.
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PMID:Acute interstitial nephritis associated with coadministration of vancomycin and ceftriaxone: case series and review of the literature. 1789 1

A 65-year-old Japanese male developed renal dysfunction, showing proteinuria and marked urinary excretion of beta2-microglobulin. He had consumed approximately 100-200 g peanuts and 750-1,000 ml beer every day for two or three months. He had previously been treated for hypertension with an angiotensin-converting enzyme inhibitor, enalapril. He then visited his primary-care doctor with mild fever, and renal dysfunction with mild diabetes mellitus were diagnosed. He was referred to our hospital, and because no diabetic retinopathy was observed by ophthalmological tests, renal biopsy examination was performed to clarify renal dysfunction. Renal biopsy specimens showed intimal thickening in the small arteries and interstitial nephritis with a granulomatous lesion, accompanied by oxalate crystals under polarized light. Glomeruli were unremarkable without any immunoglobulin deposition, and nodular lesions. Because he daily consumed a large amount of peanuts, oxalate nephropathy due to excessive intake of peanuts was strongly suspected. This case revealed that unusual food habits, including nuts, can cause oxalate nephropathy, and that close examination by renal biopsy was useful for clarifying the etiology of the unknown renal damage.
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PMID:Oxalate nephropathy with a granulomatous lesion due to excessive intake of peanuts. 1833 67

Drug-induced acute interstitial nephritis is a well-recognised and important reversible cause of acute renal failure. Peroxisome-proliferator activated receptor-gamma agonists, such as rosiglitazone, have been proven to be safe in chronic kidney disease patients. We describe a 65-year-old man with long-standing diabetes mellitus and hypertension, presenting with a five-day history of fluid overload and uraemic symptoms. There was no ingestion of analgesics, alternative medicine and other nephrotoxic drugs, the only new prescription being rosiglitazone, which was commenced during his last clinic follow-up two weeks prior to presentation. He required haemodialysis with minimal improvement in renal profile, despite cessation of the offending drug. Renal biopsy revealed findings consistent with acute interstitial nephritis. An episode of upper gastrointestinal bleeding with bleeding duodenal ulcer limited the use of steroids. He was treated with a course of mycophenolate mofetil which showed good gradual response and he remained stable with residual renal impairment.
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PMID:Acute renal failure following the use of rosiglitazone in a chronic kidney disease patient. 1922 67

The most striking feature observed in this study is the extensive variation of the serum in relation to its proteins. It was found that in certain diseases the globulin fraction is markedly increased, whereas the total protein of the serum may be normal, or may fall far below normal in amount. The diseases in which an increase in the globulins takes place may be grouped as follows: (1) cardiac diseases associated with decompensation and serous effusions, (2) pulmonary or respiratory affections of inflammatory or non-inflammatory origin (pneumonia, emphysema, polycythemia), (3) diabetes mellitus, and (4) parenchymatous nephritis. In the serum of chronic parenchymatous nephritis the increase in the globulin content is most pronounced and may constitute nearly all the protein, or as much as 95 per cent. The globulin content of serum is normal or diminished in the following diseases: (1) simple achylia gastrica (short duration), (2) tuberculosis, (3) diabetes insipidus, and (4) chronic interstitial nephritis. Other ingredients of the sera analyzed showed variations which cannot be definitely classified; but in a general way it appears upon careful analysis that an accumulation of water and salt occurs in those diseases in which the globulin fraction of the blood serum is increased.
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PMID:A CONTRIBUTION TO THE STUDY OF THE CHEMISTRY OF BLOOD SERUM. 1986 8


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