Optimized patient care demands flexibility in choosing therapy.
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Biomedical subjects
Publications and source records attributed to V Cambi.
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The ultrastructure (US) of the skeletal muscle from 10 patients on conservative treatment (PCT) and 10 haemodialysed patients (HP) was studied. The two groups exhibited no qualitative differences but quantitative alterations of the mitochondrial apparatus and capillary vessels were more impressive in the HP group. Disarray and loss of the myofibrillar sarcoplasm was the most obvious change in the uraemic muscle. The US findings are consistent with a neurogenic atrophy of the uraemic skeletal muscle but other features indicate a primary myopathic damage probably caused by a deficit of muscle microcirculation and by changes in the mitochondrial respiratory chain.
Critical problems of CAPD: (a) protein loss; (b) peritonitis; (c) glucose overload; (d) intra-abdominal pressure, can be rationally managed by an integrated intracorporeal and extracorporeal approach. A single two-litre peritoneal exchange performed during the night in addition to haemodialysis every four to six days (HD-PD) reduces a, b, c and eliminates d. This HD-PD technique has been evaluated in eight uraemic patients over a total period of 20.5 patient months. Preliminary results show that this procedure can provide adequate biochemical control, with low protein losses and limited interdialysis weight gain.
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Association cases of tuberous sclerosis (ST) and renal displasia-tumors are infrequently seen in literature. These tumors are bilateral renal cystic displasia (RP) rare hamartomas, p.e. angiomyolipomas, and malignant neoplasms, p.e. renal clear cell carcinomas. There therefor as to the frequency of those pathological associations with ST, AML are frequently seen (50-80%). Reports of polycystic renal disease with ST are rare, whereas occasional associations of renal cell carcinomas with ST are founded out. By extensive literature examination of it's evident that the synchronous association of these pathological lesions is exceptional. This report describes one case of AML, RP and renal clear cell carcinoma in a female, 22 years old, with ST; the pathological, clinical and pathogenetic features are discussed.
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Hypertonic haemodiafiltration is a simultaneous hypertonic (delta 550, Na 275mEq/L) low volume (7.2 litres) haemofiltration and hypotonic (delta 282) short time (180') haemodialysis. Reduction of the predialysis body pool of MM (-48 per cent) and small molecules (-33 per cent) was obtained. No relationship between vascular stability and MM removal was observed. However, a net UF of 20.5ml/min and a greater removal of solutes up to 1500 daltons mw were obtained with a three hours thrice weekly dialysis programme.
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We present an original method for the preparation of "stable" dialysate containing 35 mEq/l of bicarbonate. The dialysate was utilized with 4 patients for periods ranging from 4 months to 1 year according to a short-term recirculated dialysis schedule in closed circuit (20-40L) (2-2 1/2 hrs) on alternate days. Preliminary results are reported here with respect to the tollerance of the dialytic run and correction of the acid-base balance equilibrium. The clinical tollerance is excellent despite high dehydration rates even in patients particularly sensitive to ultrafiltration. The acidosis correction would seem to be much better with bicarbonate than with traditional dialysis. The difference is even higher if we consider the brevity of the dialysis. During the bicarbonate dialysis we do not observe any fall of the PCO2 or significant difference in PO2 in the patient's blood. The correction of acidosis probably causes the normalization of pre-dialytic potassiemia in spite the "net" removal of K with short dialysis is considerably less.
The authors, on personal experience, based on parathyroidectomies for secondary hyperparathyroidism, relate the surgical anatomic findings after a brief discussion on indications. They relate beside some atypical seats of parathyroid glands, observed in 11 glands of the 59 removed. Finally they emphasize the importance of accuracy of surgical exploration because that cannot be helped by instrumental methods or by gross pathologic observation.
Three patients on maintenance dialysis were each treated with three different procedures: A) twenty-liter recirculation dialysis with bicarbonate buffering, B) recirculation-adsorption dialysis and C) single-pass dialysis. Hemodynamic parameters were measured invasively and procedures A, B and C were compared for each patient. In this intraindividual comparative study, the authors attempted to establish a relationship between the varying hemodynamic parameters and the changes in osmolality and acid-base status. There were indications of some causal relationship to circulatory stability: in A and B, there were peripheral resistance increases of 24.5% and 38.4%, respectively, with stable circulation; in C, there was a 6.1% increase and unstable circulation. Additionally, the influence of acidosis is shown in B, with disproportionately strong reductions of cardiac output (21.9%) and pulmonary artery pressure (44.9%); In spite of a decrease of osmolality (A: 15.6 mOsm/L), stable circulation could be achieved if the peripheral resistance was substantially increased and acid-base status was equalized.
The clinical experience obtained with 2 hours every other day recirculation dialysis, using 20-40 liters of dialysate, without sorbents, and standard cuprophane dialyzers of 1.0-1.5 sq.mt. is reported. So far, over 350 treatments in 8 patients have been performed. After 2 hours of treatment the removal of urea, creatinine, phosphate and uric acid, is similar to that obtained by 4-6 hours of haemofiltration. The alkalinazation of the patient through direct venous infusion of bicarbonate, makes predialysis acid-base significantly better than in standard haemodialysis and haemofiltration. Asymptomatic correction of severe fluid overload is easily obtained like in isolated ultrafiltration. The role of osmolality and vasopressors are discussed. A dry weight below the value obtained by previous dialysis treatment is achieved, and volume dependent hypertensions as in haemofiltration are corrected after 2-8 weeks. As an additional advantage, this method offers a highly semplified technical approach and a further reduction of the dialysis time.
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