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Biomedical subjects

G Rifle

Publications and source records attributed to G Rifle.

At least 55 records · Page 3Linked to original sources

Miller-Fisher syndrome and pontine abnormalities on MRI: a case report.

The authors report a patient with Miller-Fisher syndrome in whom MRI of the brain stem showed increased signal density on T2 sequence anterior to the fourth ventricle, on the right and the left. The authors discuss the relation between these MRI abnormalities and some clinical features of the syndrome. The authors believe that the cardinal features of Miller-Fisher syndrome are due to peripheral nervous system dysfunction, but that this does not preclude a possible central nervous system involvement.

Ataxia↗

Acute renal failure following collective intoxication by Cortinarius orellanus.

Twenty-six young men with no previous medical history all ingested mushroom soup, exclusively made with Cortinarius orellanus. They were hospitalized 10-12 days after the incident. On admission, 12 patients presented with acute tubulointerstitial nephritis with acute renal failure; 8 required haemodialysis. In addition to symptomatic treatment, 9 patients were given corticosteroids. In this group of 12 patients, 8 recovered rapidly, and the other 4 suffered from chronic renal failure for several months. In the other group of 14 patients, initial leukocyturia was observed in 12 cases, although renal function remained normal during a one-year follow-up. Hepatic acetylation and hydroxylation tests performed after 6 months in 22 patients did not provide any explanation for the strong individual sensitivity to the renal toxicity of this fungus.

Acute Kidney Injury↗

[For or against renal biopsy after 65 years].

Kidney biopsy (KB) is controversial in the elderly because it is generally felt that the risks exceed the potential therapeutic benefits. In this review of our personal experience and the literature reports, we discuss the risks of this diagnostic procedure and its use in the four main circumstances of patient referral. On the one hand, KB does not seem to be more hazardous in the elderly, provided that it is not performed in patients in poor condition or with atrophic kidneys or suspected vascular lesions. On the other hand, KB is clearly useful in a number of elderly patients either to assess the diagnosis of a systemic disease involving the kidney or to select the appropriate treatment. 1. In patients with non nephrotic proteinuria, KB should be performed if the proteinuria is associated with extra-renal signs suggestive of systemic disease or with deterioration of renal function. 2. Nephrotic syndrome without evidence of amyloidosis and diabetes, should lead to KB to identify patients with minimal change disease (MCD) requiring steroid treatment. Indeed, MCD can rarely be suspected on clinical grounds as the resulting nephrotic syndrome is rarely "pure" at this age. 3. In acute renal failure, KB seems to be essential and urgent in patients with rapidly progressive glomerulonephritis and in those with renal failure of dubious origin to select the most appropriate treatment according to the etiology and the type of renal lesions (sclerotic or "active"). 4. KB is useless and hazardous in chronic renal failure, except in case of unexplained rapid worsening of renal function in patients with previously moderate renal failure.

Acute Kidney Injury↗

Variations of sotalol kinetics in renal insufficiency.

Decreased elimination of sotalol (160 mg) is found in patients with renal insufficiency. Simulation of plasma concentrations at steady-state exhibits moderately higher concentrations when creatinine clearance is between 10 and 30 ml/min and very high plasma concentrations when creatinine clearance is less than 10 ml/min suggesting, if treatment is absolutely necessary, monitoring in these cases and the reduction of the dose in major renal insufficiency.

Arrhythmias, Cardiac↗

Aluminium bone deposits in normal renal function patients after long-term treatment by plasma exchange.

The accumulation of aluminium (Al) can cause Al bone deposits, osteomalacia and encephalopathy. As albumin solutions used as replacement fluid in plasma exchange (PE) are contaminated with Al, we studied Al overload in two symptomless patients with normal renal function, treated by long-term plasma exchange (PE). Total Al loading was calculated at 1750 mumol in patient 1 (178 PE sessions) and 2100 mumol in patient 2 (153 PE sessions). Bone biopsy showed Al deposits and low bone formation without osteomalacia in patient 1 and only osteoporosis in patient 2. Plasma Al levels were useless in detecting early Al overload, because the remained in the normal range, even after PE in both patients. Bone biopsy was the best means of recognizing Al intoxication, but cannot be recommended for frequent evaluations. However, the desferrioxamine mobilization test can be proposed as a repetitive non-invasive investigation method.

Aged↗

[Treatment of refractory congestive cardiac insufficiency by continuous peritoneal dialysis. Long-term course].

Continuous and progressive fluid removal was performed by continuous peritoneal dialysis in 19 patients (14 men, 5 women, mean age 60.7 years) suffering from refractory congestive heart failure. All patients were in NYHA class IV and had a life-threatening fluid overload. Twelve had normal renal function or functional renal failure, and 7 had organic renal failure. The continuous peritoneal dialysis technique with a high K+ concentration in the dialysate did not raise any particular problem. Mean survival of the whole group was 7.1 months. This figure rose to 16 months (rang 2-51 months) in the patients who survived at the end of the first month. Sixteen out of 19 patients eventually died, most of them suddenly and probably of ventricular arrhythmia. Nine patients were discharged on continuous ambulatory peritoneal dialysis and remained on it for 2 to 48 months. Drug therapy could be reduced in all cases. Dialysis was discontinued in 5 patients without organic renal failure who thereafter survived for a mean period of 5 months. Functional improvement and duration of survival were uncorrelated with heart disease, fluid overload, initial renal function or initial left ventricular ejection fraction. A cardiothoracic ratio greater than 0.70 and the need for mechanical ventilation seemed to be of poor prognosis. Such results justify the pursuit of this study before defining selection criteria.

Actuarial Analysis↗

[Primary biliary cirrhosis: therapeutic trial using plasma exchange and immunosuppression. Preliminary results].

Four women aged 35 to 57 years (m: 49.2) with primary biliary cirrhosis and intractable pruritus had an estimated median survival time according to Christensen between 6 and 50 months (m: 27). They were enrolled in a therapeutic trial associating plasma exchange (PE) and immunosuppressive drugs. During the first 2 months, they received prednisone 15 mg/day, cyclophosphamide 2 mg/kg BW/day and 28 PE (60 ml/kg BW). Pruritus disappeared rapidly. After 2 months, mean levels of bilirubin, alkaline phosphatases, IgM and anti-mitochondrial antibodies dropped by 27 p. 100, 47 p. 100, 50 p. 100 and 85 p. 100 respectively, whereas amino-transferase and gamma-glutamyl-transpeptidase activities were unaltered. Two patients then received supportive therapy only: one was lost to follow-up after one year, the other died 50 months later from liver failure. The third patient received PE only when intractable pruritus reappeared: anti-mitochondrial antibodies, IgM and alkaline phosphatases remained below initial values for 38 months, until successful liver transplantation was performed. The fourth patient was treated on a long term basis by PE twice a month, prednisone 10 mg/day for 3 years and cyclophosphamide 1 mg/kgBW/day for one year only. Her initial estimated survival time was 6 months, but 3 years later she developed portal hypertension; anti-mitochondrial antibody titer was between 0 and 1/80, alkaline phosphatase levels reduced by 80 p. 100 to 70 p. 100; bilirubin level up by 50 p. 100. The mean survival time for the 4 patients exceeded 34 months, results better than those obtained with other kinds of therapy.

Adult↗

Relapses of idiopathic diffuse crescentic glomerulonephritis without immune deposits: report of 6 cases.

Idiopathic diffuse crescentic glomerulonephritis without immune deposits is a variant of rapidly progressive glomerulonephritis which can account for up to 40% of crescentic nephritis. The prognosis may depend on both the severity of histological injury at presentation and the efficacy of treatment. Recent advances in therapy have improved the outlook further, and prolonged stable remissions with mild renal failure can occur which contrast with the previously common evolution towards end-stage renal failure within a few weeks. However, relapses in otherwise stable remission may be seen, and we describe a series of 6 acute relapses interrupting such prolonged remissions. The relapses were defined by clinical and histological means. This modification of the natural history of some crescentic glomerulonephritis may reflect new therapeutic strategies, and the relapses may reflect a cyclical nature to the disease evolution which was previously hidden by hemodialysis. The possibility of successive flares suggests that kidney biopsies should be repeated when a rapid deterioration of renal function occurs, since treatment such as high-dose steroids and/or plasma exchange can be again effective if started early.

Adult↗