Annals of surgery
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Seventy-three recipients of renal allografts from cadaver donors, and 121 recipients of kidneys from living related donors were studied to determine whether there were any differences in posttransplant results between patients that had a high average serum concentration of ALG (>/=800 microg/ml) during the two weeks of ALG therapy and patients that had low serum levels (=799 microg/ml). Cadaver kidney recipients who had high serum ALG levels (average 1126 microg/ml) had significantly fewer rejection episodes three months posttransplant and less kidney loss three and six months posttransplant when compared to patients with low serum ALG concentrations (average 629 microg/ml). The tendencies after three and six months favored the group with high serum ALG levels, but the differences were not statistically significant. ⋯ When high risk diabetics or patients older than 40 were excluded from the related recipients, the number of rejection episodes was still significantly less in patients with high serum ALG levels. There was significantly less kidney loss 24 and more months posttransplant in recipients of kidneys from living related donors whether or not high risk patients were excluded. These results support previous reports from the University of Minnesota indicating ALG is a safe and effective immunosuppressive agent in renal allograft recipients.
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The ability to predict acute renal allograft rejection episodes or infectious potentials by immunologic monitoring was studied in 15 renal transplant recipients. Specifically, total circulating erythrocyte- (E) and erythrocyte-antibody-complement (EAC) rosetting cells were serially studied for the first two months after transplantation and related to immunosuppressive therapy and rejection activity. Total circulating, E-rosetting cells (T cells) were noted to be significantly depressed if rabbit anti-human thymocyte globulin (RAHTG) was used in the immunosuppression protocol. ⋯ The rapid repopulation of T cells occurred about 10 days before clinical parameters of rejection were evident. The incidence of infection was greater in those patients with total E-rosettes less than 200/mm3. Serial monitoring of total E-rosetting cells after transplantation provides a diagnostic tool for predicting ensuing rejections and can also be used to gain information concerning the susceptibility to infection.
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Forty-seven patients with chronic renal failure presenting with a loss of vascular access precluding hemodialysis were subjected to 105 surgical procedures to establish and to maintain an arteriovenous fistulae. 67 bovine heterografts were implanted over a 30 month period and observed for 6 or more months. Fifteen, or 32% of the patients, died during the study period. Eleven patients died with a functional fistula. ⋯ Six of 8 patients with aneurysm presented with severe hypertension. Thirteen aneurysms were resected without loss of life or limb. The use of bovine grafts in hypertensive negro patients is believed to be contraindicated.