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Biomedical subjects

M Hoelscher

Publications and source records attributed to M Hoelscher.

21 records · Page 2Linked to original sources

Infections complicating orthotopic liver transplantation: a study emphasizing graft-related septicemia.

In 93 recipients of 102 orthotopic liver homografts, the incidence of bacteremia or fungemia exceeded 70%. The graft itself was usually an entry site for systemic infection after both immunologic and nonimmunologic parenchymal injury, especially if there was defective biliary drainage. The role of the homograft itself as the special infectious risk factor has prompted increased use of defunctionalized jejunal Roux limbs to reduce graft contamination. It has also stimulated very aggressive postoperative diagnostic efforts to rule out remedial mechanical complications of the transplant.

Humans↗

Orthotopic liver transplantation in ninety-three patients.

During the 11 1/2 year period ending 13 months ago, 93 consecutive patients were treated with orthotopic liver transplantation. Fifty-six of the recipients were 18 years old or younger, and the other 37 were adults. The most common indications for operation were biliary atresia, primary hepatic malignant tumor, chronic aggressive hepatitis and alcoholic cirrhosis. There has been a gradual improvement in results throughout the period of study, although to a satisfactory level. Twenty-seven of the 93 patients survived for at least one year after liver replacement with a maximum of six years, and 16 are still alive after 13 to 71 months. The 11 late deaths after one to six years were caused by chronic rejection, biliary obstruction, recurrence of hepatoma, systemic infection or hepatitis of the homograft. Rejection of the liver as judged by classical histopathologic criteria played a surprisingly small role in the heavy over-all mortality, accounting for less than 10 per cent of the deaths. Technical or mechanical problems, especially those of biliary duct reconstruction, were a far greater cause of failure, as were systemic infections. Six of the 37 adult recipients had lethal cerebrovascular accidents during, or just after, operation. When abnormalities of liver function developed in the postoperative period, the nearly automatic diagnosis of homograft rejection, in retrospect, proved to have been wrong in most instances. Further development of liver transplantation depends upon two kinds of progress. There must be reduction of operative and early postoperative accidents and complications by more discriminating patient selection, purely technical improvement and better standardization of biliary duct reconstruction. The second area will be in sharpening the criteria for the differnetial diagnosis of postoperative hepatic malfunction, including the liberal use of transhepatic cholangiography and needle biopsy. Only then can better decisions be made about changes in medication or about the need for secondary corrective surgical procedures.

Adolescent↗

Pharacological prolongation of ischemic tolerance of rat-kidneys by Na-Cu-chlorophyllin.

This experimental study demonstrated that the warm ischemic tolerance of a rat kidney is about 60 mins, in this model. If the warm ischemic time is 60 mins or longer, in unilateral nephrectomized rats, the animals die of renal insufficiency. After pre-operative treatment with Na-Cu-chlorophyllin we observed a significantly lower increase of serum urea and creatinine levels, caused by a pharmacological effect on the kidneys. The prolongation of warm ischemic tolerance of rat kidneys is about 30 mins in this model; that means 50% more than the normal ischemic tolerance. From our results and from the literature we conclude that Na-Cu-chlorophyllin has a membrane stablilizing and an inhibiting effect on autolytic enzymes. The drug Na-Cu-chlorophyllin has indeed 2 positive effects: the immunosuppressive and organ preseving effect. These effects may play a role in donor and recipient pretreatment and treatment after grafting.

Animals↗