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Biomedical subjects

R Pichlmayr

Publications and source records attributed to R Pichlmayr.

At least 19 recordsLinked to original sources
PubMed2004

Cardiovascular morbidity and mortality in patients with diabetes mellitus type I after kidney transplantation: a case-control study.

BACKGROUND: The proportion of diabetics among patients requiring renal replacement therapy continues to increase in most western countries. The acceptance rate for renal transplantation varies among transplant centers and is influenced by the current opinion on the outcome of transplantation in diabetics. Controlled data on patient and graft survival in type I diabetics, however, are scarce. METHODS: We performed a retrospective case-control analysis on patient and graft survival and the cardiovascular morbidity of patients with type I diabetes after renal transplantation versus carefully matched non-diabetic transplant recipients. Match criteria were duration of previous hemodialysis, age and date of renal transplantation. Moreover, risk factors for cardiovascular disease in uremic patients were evaluated at the time of registration for renal transplantation and at the end of the observation period. RESULTS: Seventy-seven matched pairs were enclosed. Patient survival was significantly worse in the diabetic patients, graft survival was comparable in both groups, when graft loss because of patient's death was censored. In the diabetic patients, risk of death (odds ratio: 4.38) as well as the prevalence of cardiovascular morbidity (odds ratio: 4.47) were significantly higher than in the matched nondiabetic controls. Cox regression analysis showed that diabetes mellitus was an independent risk factor for patient survival; no association was found with hypertension, hyperlipidemia, hyperparathyroidism, calcium x phosphate product, body mass index and HbA1c. Cardiovascular morbidity, however, was already significantly higher in the diabetic group at the time of registration. CONCLUSIONS: Diabetes mellitus type I has a dominant impact on morbidity and mortality after renal transplantation and is associated with an approximately 4-fold higher risk of death. Cardiovascular disease accounts for the significantly worse long-term outcome of diabetic patients after renal transplantation.

Adult↗
PubMed2000

Normalised intrinsic mortality risk in liver transplantation: European Liver Transplant Registry study.

BACKGROUND: No model exists for liver transplantation to estimate the mortality risk in a given patient, and no standard by which to assess performance in different centres. We investigated the intrinsic mortality risk in the absence of known mortality risk factors. METHODS: We identified mortality risk factors and risk ratios quantified in data from the European Liver Transplant Registry (22,089 patients at 102 centres in 18 countries) registered from 1988 to 1997. To develop a model of the intrinsic risk and the risk ratios for specific factors, univariate and multivariate analyses were done separately for the overall population, for adults, and for children younger than 15 years, and the number of deaths were estimated. We validated the model by comparing mortality in patients without risk factors with the model-adjusted mortality in patients with risk factors. FINDINGS: Overall 5-year and 8-year actuarial survival was 66% (95% CI 65-66) and 61% (60-62). 65% of deaths occurred within 6 months. Retransplantation, transplantation for cancer, acute liver failure, fewer than 20 split-liver grafts per year, and a centre workload of fewer than 25 transplants per year were the main risk factors of 12 identified factors. 1-year and 5-year death rates among adults with no risk factors were similar to model estimates (15 [13-16] vs 14% [13-15], and 22 (20-24) vs 23% [21-24]). Corresponding data for paediatric transplants were 9% (7-12) compared with 11% (9-12) and 13% (10-17) compared with 14% (11-16). The reduction of mortality risk in high-volume centres was even greater in patients without risk factors (48 vs 23%, p<0.001). INTERPRETATION: The normalised intrinsic mortality risk can be combined with the relative risk ratios of known risk factors to better estimate the mortality risk of a given procedure in a given patient. Centres can assess performance by removing potential bias of donor and recipient selection.

Adolescent↗
PubMed2000

Ex-vivo resection techniques in tissue-preserving surgery for liver malignancies.

Some primary and secondary liver tumours are not absolutely irresectable, but cannot be resected using a conventional approach because of the limited warm ischaemia tolerance of the liver or poor accessibility of the tumour region. In such situations, the techniques of ex vivo liver surgery, pioneered by Rudolf Pichlmayr some 10 years ago, offer new chances for R0 resection. All the three different approaches, namely "in situ"-, "ante situm"-, and "ex situ" resection, require the use of measures originally developed for transplantation, such as hypothermic liver perfusion and veno-venous bypass. They differ mainly in the extent to which major vessels are divided in order to achieve optimal mobility of the organ. The results show that radical resection can be achieved accomplished in many cases. If necessary, complex vascular reconstructions can be performed. Although perioperative morbidity and mortality are high, there are a number of long-term survivors. Tumour recurrence, however, remains the main problem over the long term. In conclusion, ex vivo liver surgery is an important extension of surgical treatment possibilities. However, the procedure is suitable only for a small number of carefully selected patients and should be reserved for use in specialised centres. Furthermore, in view of the fact that the results are not yet optimal, additive and adjuvant treatment modalities are needed.

Blood Loss, Surgical↗
PubMed2000

Long-term experience after ex situ liver surgery.

BACKGROUND: Ex situ liver surgery allows liver resection and vascular reconstruction in patients who have liver tumors located at critical sites. Only a small series of studies about ex situ liver surgery is available in the literature. No long-term results have been published. METHODS: Twenty-four patients were considered for ex situ liver surgery because conventional liver surgery was considered impossible or too hazardous. The patient's ages were 51.3 +/- 7.5 years. Indications were various primary and secondary liver malignancies and benign liver tumors in 2 patients. RESULTS: In 22 of 24 patients, the ex situ liver resection and subsequent autotransplantation were performed. The anhepatic periods in these patients lasted for 5.6 +/- 1.1 hours. In the remaining 2 patients, autotransplantation was not possible and allogenic liver transplantation was performed 17 and 19 hours after hepatectomy. In 4 patients, liver failure occurred after autotransplantation and required transplantation. The confluens between hepatic veins and the inferior vena cava was reconstructed in 5 patients. Fifteen patients survived the postoperative period and were discharged after 36.5 +/- 16 days. The median survival time of 6 patients who had metastases of colonic carcinoma was 21 months. The 2 patients with benign liver disease are alive 9 and 5 years after ex situ surgery. CONCLUSIONS: Extended liver resections with difficult reconstructions of the hepatic venous confluens are feasible by ex situ liver surgery and subsequent autotransplantation. However, the early postoperative mortality rate is high, especially in patients with cholestatic livers. Early tumor recurrence remained the problem in these patients with extended local tumor spread. Ex situ liver surgery should only be performed in selected patients.

Adult↗
PubMed1999

Rescue hepatectomy for initial graft non-function after liver transplantation.

BACKGROUND: Early retransplantation is the therapy of choice in patients with initial graft nonfunction (INF). In rare cases the patients' conditions deteriorate dramatically with severe cardiovascular and/or pulmonary insufficiency while on the waiting list for retransplantation. In this life-threatening situation removal of the graft and temporary portocaval shunt before allocation of a new liver proved to be effective. Our experience with this two-stage hepatectomy and subsequent liver transplantation in patients with complicated INF is reported. METHODS: Hepatectomy was performed in 20 patients with INF associated with severe cardiovascular and pulmonary insufficiency while on the waiting list for emergency liver retransplantation. The mean age was 41.75+/-16.64 years. The time period between primary transplantation and hepatectomy was 2.80+/-2.84 days with a range from 1 to 9 days. RESULTS: Hepatectomy reduced the need for vasopressive agents and improved pulmonary function in the majority of patients. Four patients died before a liver was available due to brain death in one patient and multiorgan failure in three patients. In the remaining 16 patients liver transplantation could be performed after 19.82+/-15.34 hr (range 6.58 to 72.50 hr). Two of the 16 transplanted patients died on the first postoperative day due to multiorgan failure and pneumonia. The remaining 14 of 16 patients survived retransplantation, but 7 died between days 13 and 105 mostly due to sepsis. Seven patients were discharged from the hospital in good condition and show long-term survival. CONCLUSION: Hepatectomy was able to stabilize the cardiovascular and pulmonary function. This study confirms the beneficial effects of hepatectomy and subsequent liver transplantation as a life-saving procedure in patients with INF complicated by cardiovascular and/or pulmonary instability.

Adolescent↗
PubMed1999

Familial Amyloidotic Polyneuropathy: domino liver transplantation.

BACKGROUND/AIMS: The primary cause of Familial Amyloidotic Polyneuropathy is a variant transthyretin gene on chromosome 18. Progressive polyneuropathy followed by fatal cardiac and renal failure commonly manifest during middle age. Within 10 years after onset of clinical symptoms, affected individuals usually die due to malnutrition or heart failure. Currently, liver transplantation is the only available therapeutic option. METHODS: We performed liver transplantation in two patients with Familial Amyloidotic Polyneuropathy carrying the transthyretin-30 mutant. Two patients aged more than 50 years received the two explanted amyloidotic livers. This procedure is called Domino liver transplantation. We report the outcome in the studied subjects and analyze the metabolic consequences of this procedure. RESULTS: We determined the serum half-life of transthyretin-30 as 2.25 days using daily monitoring of transthyretin-30 levels. An affected amyloidotic patient had an increased serum concentration of lipoprotein(a) of 78 mg/dl before transplantation. The tumor patient, who received the organ from this affected patient, developed an almost identical serum concentration of lipoprotein(a) after liver transplantation, confirming the liver as the primary site of synthesis of this lipoprotein. CONCLUSION: Once Domino liver transplantation has been performed, the impact of the liver-dependent metabolism of specific proteins of interest can be studied.

Adult↗
PubMed1999

Entry-into-human study with the novel immunosuppressant SDZ RAD in stable renal transplant recipients.

AIMS: To evaluate the tolerability of single oral SDZ RAD doses in stable renal transplant recipients and the pharmacokinetics of ascending SDZ RAD doses when coadministered with steady-state cyclosporin A microemulsion (Neoral). METHODS: This randomized, double-blind, placebo-controlled, sequential study involved 54 patients in six treatment groups; a different SDZ RAD dose (0.25, 0. 75, 2.5, 7.5, 15, 25 mg) was assessed in each group. Patients received a single oral dose of SDZ RAD (n=6) or placebo (n=3) with their usual Neoral dose. SDZ RAD and cyclosporin A pharmacokinetic parameters were determined. RESULTS: All SDZ RAD doses were well tolerated, with no discontinuations due to adverse events, serious adverse events, or deaths. Similar proportions of patients receiving SDZ RAD and placebo had at least one adverse event (44% and 50%, respectively). Mean changes in laboratory variables (baseline to endpoint) showed no clinically meaningful differences between SDZ RAD and placebo groups. SDZ RAD was absorbed rapidly and showed dose-proportional pharmacokinetics (dose: 2.5-25 mg), based on systemic exposure. Multiple postabsorptive phases in the pharmacokinetic profile indicate tissue distribution. The elimination half-life ranged from 24 to 35 h across the five highest dose groups. Pharmacokinetics were similar in men and women. Co-administration of escalating single oral SDZ RAD doses did not affect steady-state cyclosporin A pharmacokinetics. CONCLUSIONS: SDZ RAD was well tolerated; safety profiles of SDZ RAD and placebo were similar. SDZ RAD pharmacokinetics were dose-proportional across the range 2.5-25 mg in conjunction with cyclosporin A-based therapy, according to systemic exposure. Cyclosporin A pharmacokinetics were not affected by coadministration of single oral doses of 0.25-25 mg SDZ RAD.

Adolescent↗
PubMed1999

Kidney transplanted children come of age.

BACKGROUND: The aim of renal replacement therapy in children is to restore their potential for normal growth and development in order to reach mature adulthood. Because pediatric kidney transplantation started in the late 1960s, it is now possible to document the progress and outcome of these patients from transplantation in childhood to survival into adulthood. METHODS: In this single-center study, all 150 children born before December 1977 and having received a kidney transplant between 1970 and 1993 were selected for long-term follow-up. The mean age at transplantation was 12.1 years (range 3.2 to 16.7), and the mean follow-up was 13.1 years (range 2.0 to 25.0). In December 1995, 124 grown-up patients with a mean age of 25.4 years (range 18.4 to 40.3) were alive, 89 with a functioning graft. Fifty had the first graft functioning longer than 10 years. The fate of all patients was traced, and those living were analyzed in regard to their somatic and socioeconomic states. RESULTS: The actuarial 25-year survival rate for the patients was 81%, and for the first graft it was 31%. The best graft survival rates were observed after living related donation, preemptive transplantation, and immunosuppression with cyclosporine. The latter benefit, however, vanished after eight years. The mean creatinine clearance declined over the years from 76 to 45 ml/min/1.73 m2, and the incidence of hypertension increased to more than 80% of the patients. Malignancies occurred in 2.6%. Final height was stunted in 44% of noncystinotic patients, whereas all patients with cystinosis were extremely growth retarded. Twenty-seven percent suffered from additional disabilities. A majority of adult patients were rehabilitated in regard to education and socioeconomic status, and 14% were unemployed. CONCLUSIONS: The results indicate that renal transplantation in children leads to a high degree of rehabilitation in adulthood. The life of a kidney transplant, however, is limited, which points out the need for more specific immunosuppression with fewer side-effects in order to reach the goal of lifelong graft function.

Adolescent↗
PubMed1999

Reconstructive surgery for ischemic-type lesions at the bile duct bifurcation after liver transplantation.

OBJECTIVE: To assess the feasibility, morbidity, mortality, and clinical success rate of surgical reconstruction of the biliary system in patients with ischemic-type biliary lesions in their liver graft. SUMMARY BACKGROUND DATA: After liver transplantation, strictures in the biliary tree with secondary sludge formation can occur in the absence of vascular problems. Jaundice, pruritus, and recurrent cholangitis are predominant clinical features leading to considerable morbidity. Interventional measures are the first-line treatment but are frequently only of transient success. Retransplantation is usually considered when interventional treatment is not effective. METHODS: Surgical exploration and reconstruction was performed in 17 patients with ischemic-type biliary strictures at a median of 2 years after liver transplantation. Findings during surgery, surgical strategies, and postsurgical courses are described. Clinical symptoms and biochemical parameters of cholestasis and liver function were analyzed in the postsurgical course. RESULTS: During surgery, all 17 patients were found to have strictures or sclerotic changes involving the hepatic bifurcation and extrahepatic bile duct. Sludge or stones were present in nine patients. In 14 patients with viable bile ducts proximal to the bifurcation, surgical reconstruction was performed by resection of the bifurcation and hepaticojejunostomy. In three patients with more extensive biliary destruction, portoenterostomy with or without peripheral hepatojejunostomy was performed. The prevalence rate of biliary infection at surgery was 93%; the predominant organisms were Candida and enterococci. The perioperative mortality rate was 0%. Clinical symptoms and biochemical parameters became normal or were considerably improved in 14 of 16 patients (88%). CONCLUSIONS: The hepatic bifurcation seems to be a predominant site for ischemic-type biliary changes after liver transplantation. Surgical treatment by resection of the bifurcation and reconstruction by high hepaticojejunostomy is a safe and highly effective approach leading to cure or persistent major improvement in most patients.

Adult↗
PubMed1999

Peripheral hepatojejunostomy as palliative treatment for irresectable malignant tumors of the liver hilum.

OBJECTIVE: To evaluate the concept of surgical decompression of the biliary tree by peripheral hepatojejunostomy for palliative treatment of jaundice in patients with irresectable malignant tumors of the liver hilum. SUMMARY BACKGROUND DATA: Jaundice, pruritus, and recurrent cholangitis are major clinical complications in patients with obstructive cholestasis resulting from malignant tumors of the liver hilum. Methods for palliative treatment include endoscopic stenting, percutaneous transhepatic drainage, and surgical decompression. The palliative treatment of choice should be safe, effective, and comfortable for the patient. METHODS: In a retrospective study, surgical technique, perioperative complications, and efficacy of treatment were analyzed for 56 patients who had received a peripheral hepatojejunostomy between 1982 and 1997. Laparotomy in all of these patients had been performed as an attempt for curative resection. RESULTS: Hepatojejunostomy was exclusively palliative in 50 patients and was used for bridging to resection or transplantation in 7. Anastomosis was bilateral in 36 patients and unilateral in 20. The 1-month mortality in the study group was 9%; median survival was 6 months. In patients surviving >1 month, a marked and persistent decrease in cholestasis was achieved in 87%, although complete return to normal was rare. Among the patients with a marked decrease in cholestasis, 72% had no or only mild clinical symptoms such as fever or jaundice. CONCLUSIONS: Peripheral hepatojejunostomy is a feasible and reasonably effective palliative treatment for patients with irresectable tumors of the liver hilum. In patients undergoing exploratory laparotomy for attempted curative resection, this procedure frequently leads to persistent-although rarely complete-decompression of the biliary tree. In a few cases it may also be used for bridging to transplantation or liver resection after relief of cholestasis.

Adult↗
PubMed1999

Recurrence patterns of hepatocellular and fibrolamellar carcinoma after liver transplantation.

PURPOSE: Tumor recurrence is the major limitation of long-term survival after liver transplantation for hepatocellular carcinoma (HCC) or fibrolamellar carcinoma (FLC). Understanding tumor-biologic characteristics is important for selection of patients and for development of adjuvant therapeutic strategies. PATIENTS AND METHODS: The study included 69 patients who underwent potentially curative liver transplantation for HCC/FLC and survived for more than 150 days; minimum follow-up was 33 months. Frequency, localization, and timing of recurrence were analyzed and compared with primary tumor and patient characteristics. RESULTS: Tumor recurrence was observed in 39 patients at 67 locations. Hematogenous spread was the major route of tumor recurrence (87%), and the most frequent sites were the liver (62%), lung (56%), and bone (18%). Parameters associated with recurrence were absence of cirrhosis, tumor size greater than 5 cm, more than five nodules, vascular infiltration, and International Union Against Cancer (UICC) stage IVA. Selective intrahepatic recurrence was found in nine patients (23%); it was associated with highly differentiated tumors, lack of vascular infiltration, and male sex. Recurrence at multiple sites was found predominantly in young patients (< or = 40 years) and for multicentric (> 5) primary tumors. Recurrences were observed within a wide time range after transplantation (43 to 3,204 days; median, 441 days); late recurrences (> 1,000 days, n = 8) were associated with highly differentiated or fibrolamellar tumors and low UICC stages. Surgical treatment was the only therapeutic option associated with prolonged survival after recurrence. CONCLUSION: In transplant recipients, hepatocellular carcinomas vary considerably in their pattern and kinetics of metastases. Tumor cells may persist in a dormant state for long time periods before giving rise to clinical metastases. Surgical treatment of recurrence should be considered whenever possible.

Adult↗
PubMed1998

Background and prognostic implications of perireperfusion tissue injuries in human liver transplants: a panel histochemical study.

BACKGROUND: Hepatic graft reperfusion is associated with inflammatory processes of unknown relevance to the fate of graft. This study aimed to clarify this relevance by histochemical analyses of human hepatic grafts. METHODS: Paired tissue samples were taken at the end of cold preservation and 2 hr after reperfusion (n=39). From six additional grafts, biopsies were performed at the end of cold preservation only. Injury or inflammatory markers of sinusoidal endothelium (von Willebrand factor-related antigen [vWF]), Kupffer cells (25F9), platelets (CD62), neutrophil leukocytes (CD11b), interleukin (IL)-1beta, intercellular adhesion molecule (ICAM)-1, and HLA-DR were evaluated semiquantitatively by indirect immunoperoxidase staining. Steatosis was also evaluated by hematoxylin and eosin staining. RESULTS: vWF, CD62+ platelet aggregation, CD11b+ leukocytes, and IL-1beta levels increased after reperfusion, and these levels correlated with prereperfusion levels. Not only vWF, CD62+ platelets, CD11b+ leukocytes, IL-1beta, ICAM-1, and steatosis after reperfusion, but also IL-1beta, ICAM-1, and steatosis before reperfusion correlated with postoperative peak transaminase. Furthermore, vWF, CD11b+ leukocytes, 25F9+ macrophages, and ICAM-1 after reperfusion were associated with primary graft nonfunction and strong expressions of ICAM-1 or HLA-DR with early acute rejection. Although some markers (IL-1beta, CD62+ platelets, and CD11b+ leukocytes) correlated with preharvesting parameters (donor age or length of intensive care unit stay), none showed any significant correlation with cold preservation. CONCLUSION: Synergistic inflammatory events in the hepatic graft at reperfusion, which have a significant impact on the later clinical course, are largely defined and precipitated by injury or activation of nonparenchymal cells preceding reperfusion or even graft harvesting.

Adolescent↗
PubMed1998

Expression of hepatitis B virus X protein in HBV-infected human livers and hepatocellular carcinomas.

Transactivation of cellular genes and functional inactivation of p53 by the hepatitis B virus (HBV) X gene-encoded protein (HBx) are proposed as alternative mechanisms for induction of hepatocellular carcinomas (HCCs) in chronic HBV infection. Using an immunohistochemical approach, we studied the expression of HBx in 39 explanted livers with HBV-associated disease. Because the data reported previously have been inconsistent, possibly due to the application of different antibodies, we compared results with 5 polyclonal and 6 monoclonal anti-HBx antibodies from five laboratories. Ten of the 11 antibodies reacted with recombinant HBx by Western blotting, but only 1 polyclonal and 2 monoclonal antibodies reacted specifically with HBx in tissue, and were thus suitable for immunohistochemistry. Three other polyclonal antibodies reacted with tissue components in addition to HBx. One polyclonal and 4 monoclonal antibodies did not recognize the HBx in the tissue. HBx was demonstrated in 16 of 30 (53.3%) cirrhotic livers and 10 of 18 (58.8%) HCCs by all specific antibodies. The expression of HBx, among three HBV antigens examined, was found to be preferentially maintained in HCC and the surrounding liver parenchyma, including focal or nodular preneoplastic lesions. However, the immunoreactivity was always limited to the cytoplasm of a small number of parenchymal and neoplastic cells. The role of X gene expression in HBV-associated human hepatocarcinogenesis remains to be established.

Animals↗
PubMed1998

Antibodies against the GB virus C envelope 2 protein before liver transplantation protect against GB virus C de novo infection.

GB virus C (GBV-C) is a newly discovered RNA virus related to the Flaviviridae family. Although GBV-C is not yet associated with any cause of liver disease, a humoral immune response against the GBV-C envelope 2 (E2) protein has been observed. Therefore, we studied the prevalence and clinical relevance of GBV-C RNA and anti-E2 antibodies in patients undergoing orthotopic liver transplantation (OLT). In addition, we tested whether the prevalence of anti-E2 antibodies may protect against GBV-C infection. Of the 182 liver recipients included in this study, 117 of these were evaluated for GBV-C recurrence or de novo infection. GBV-C RNA was detected in sera or plasma using single-tube, reverse-transcriptase polymerase chain reaction, and anti-E2 antibody was detected by enzyme immunoassay (EIA). Cumulative patient and graft survival was tested by using Kaplan-Meier analysis. The independence of prognostic values was assessed by using Cox regression analysis. Before OLT, GBV-C RNA and anti-E2 were detected in 4.0% to 28.6% and 10.0% to 68.8%, respectively, of patients suffering from different forms of chronic liver diseases. GBV-C reinfection after OLT was determined in 85.7%. Of the patients without evidence of exposure to GBV-C before OLT, 30 of 65 (46.2%) became GBV-C RNA positive after OLT. None of the 38 patients who were anti-E2 antibody positive before OLT became GBV-C RNA positive after OLT. Neither patient nor graft survival was significantly affected by the presence of either GBV-C RNA or anti-E2 antibody before OLT. Our data indicate that 1) GBV-C RNA positive patients have a high risk of reinfection after OLT, and 2) the presence of anti-E2 antibodies before OLT is associated with an absence of GBV-C infection after OLT, which may indicate a protective role of anti-E2 antibodies.

Adult↗
PubMed1998

Asanguineous isolated hyperthermic perfusion of the liver: results of an experimental study in pigs.

Asanguineous hyperthermic liver perfusion was performed in five and seven pigs for 30 and 45 min respectively. Laboratory data, including changes of liver enzyme levels and results of liver function tests, as well as morphological alterations of liver structure, were compared with data from a 45-min oxygenated hyperthermic liver perfusion. In the group undergoing asanguineous liver perfusion survival was four of five and five of seven animals. In the oxygenated group six of seven pigs survived. Liver enzymes and function tests in the two groups with a 45-min perfusion time were not significantly different. All enzyme and laboratory test values returned to normal within 1 week. Similarly morphological changes were reversible within 1 week. The results suggest that asanguineous isolated hyperthermic liver perfusion up to 45 min is feasible without damage to liver tissue.

Animals↗
PubMed1998

The surgical technique of isolated hyperthermic arterial liver perfusion in humans.

Various techniques of isolated liver perfusions have been described, using hepatic artery or both hepatic artery and portal vein. In this paper the technique of isolated arterial liver perfusion is presented. Twelve patients suffering from non-resectable liver tumors underwent this approach. All of them had been previously unsuccessfully treated by resection or systemic chemotherapy. The liver perfusions were performed without technical problems. No operative death occurred. The mean operating time was 413 +/- 29 min. Although the perfusion medium was oxygenated and the absolute anoxic period was shorter than 10 min in all cases the perfused livers showed a marked postoperative increase of liver enzyme levels. Further studies should be aimed at reducing this hepatic injury and simplifying the complex surgical procedure.

Adult↗
PubMed1998

[Early morphological changes in Crohn disease as further evidence for conservative resection indications].

Clinical studies revealed that the size of the margin of resection and the microscopic findings at the edge of the specimen did not influence the rate of recurrence. Regarding early lesions of Crohn's disease, the aim of the present study was to identify morphological alterations which are able to explain the clinical findings and are in accordance with the operative procedure. In the present study the resection margins of 29 patients with Crohn's disease were investigated using the scanning electron microscope. Seventy-three percent of patients with histopathologically unaffected resection margins in the small bowel and 71% in the large bowel showed early lesions. These consisted of mucosal architectural alterations, epithelial bridge formation and goblet cell hyperplasia and hypertrophy. Curative resection is not possible, independent of the resection margins. The morphological findings underline the correctness of the usual operative procedure, namely limited resections in Crohn's disease.

Crohn Disease↗