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Biomedical subjects

P McMaster

Publications and source records attributed to P McMaster.

At least 217 records · Page 12Linked to original sources

Liver transplantation: indications and pre-operative prognostic factors.

Liver transplantation is now increasingly being accepted as a valuable and effective way of greatly improving not just the survival of patients with major hepatic disease but also their quality of life. Rehabilitation is excellent after liver replacement and if increasing success is to be achieved with greater numbers of young people rehabilitated an increasing awareness of the benefits should be matched by an early review and discussion in order to reduce the high proportion of patients still being referred for replacement in the agonal phase of their disease at a time when the morbidity and mortality of the procedure remains high. The balance between intervention which is "too early" or "too late" may for the individual patient be a difficult judgment but the benefits of making this correct clinical judgment is now undoubted. Liver replacement for advanced liver disease can no longer be considered an experimental undertaking now that so many of the technical issues have been resolved. Inevitably as in so many aspects of medicine the discussion will now concentrate on the timing of intervention rather than whether intervention itself should occur.

Carcinoma, Hepatocellular↗

Neurological complications following liver transplantation.

17 (33%) of 52 patients who underwent 56 consecutive orthotopic liver transplants had serious neurological complications postoperatively. The commonest complication was fits, which occurred in 13 (25%) patients. 50% of patients had their onset of fits within the first week. In 3 patients the fits were associated with postoperative metabolic encephalopathy and fatal progressive neurological deterioration. In some patients the evidence implicating cyclosporin in the development of fits is strong. In others factors such as electrolyte disturbances, steroid treatment for graft rejection, and cerebral infarction may have contributed to the development of the fits. Phenytoin controlled the fits in 10 out of 13 patients. Other neurological complications included 1 case of central pontine myelinolysis, 1 of cerebral abscess, and 4 of non-encephalopathic psychosis.

Adolescent↗

Orthotopic liver transplantation: postoperative complications and their management.

The Birmingham liver transplant programme started in 1982. Forty-six patients have been transplanted with a follow-up of 3 months or longer. Twenty-seven patients are still alive, of whom sixteen have lived for more than one year. The 30 day hospital mortality was 30.4 per cent and the actuarial predicted one year survival 55.5 per cent. Four patients have been regrafted for chronic rejection and graft failure. Thirteen patients have required surgery in the postoperative period for: bleeding (two), removal of abdominal packs (four), biliary leaks and obstruction (five), duodenal perforation (one) and small bowel obstruction (one). Acute rejection was common, occurring in 30 patients and progressing to chronic rejection in 4. Ten patients developed renal failure with an 80 per cent mortality and eleven patients developed grand mal fits. Severe bleeding (greater than 70 units) was associated with previous abdominal surgery and a high mortality (88.9 per cent). Opportunistic fungal infection carried a 100 per cent mortality. Although more than half of all transplanted patients will survive for more than one year, the postoperative period is still one of high morbidity and mortality.

Acute Kidney Injury↗

Fibrosarcoma of the transverse colon.

Colonic fibrosarcoma is extremely rare. This is a report of a patient with fibrosarcoma of the transverse colon, manifesting as an obstructive lesion with local perforation and abscess formation.

Colon↗

Epithelioid haemangioendothelioma. A case report.

Epithelioid haemangioendothelioma of the liver is an extremely rare tumour which has only recently been recognised. This report describes the clinical, radiological and histological findings in a case of a primary epithelioid haemangioendothelioma of the liver. The case highlights some of the difficulties in establishing the diagnosis, and in its differentiation from Budd-Chiari syndrome and veno-occlusive disease. The patient has subsequently undergone successful orthotopic hepatic transplantation.

Diagnosis, Differential↗

Plasma ionized calcium monitoring during liver transplantation.

Plasma ionized calcium and citrate concentrations were measured in 11 patients undergoing liver transplantation. During the anhepatic phase of the procedure, ionized calcium concentrations fell to as low as 40% of normal, in spite of calcium supplementation. Simultaneously, citrate concentrations rose to between 20 and 100 times preoperative levels. In two patients low plasma ionized calcium concentrations were associated with hypotension that responded to calcium infusion. Intraoperative monitoring of plasma ionized calcium during liver transplantation is helpful in the rational control of the patient's calcium status.

Calcium↗

Staghorn calculus in a renal allograft.

A case of staghorn calculus in a transplanted kidney associated with tertiary hyperparathyroidism in the presence of infection has been described. Possible mechanisms of pathophysiology have been discussed.

Adult↗

Transplantation. Pancreas.

Significant progress has been made in the management of diabetes mellitus treated by pancreas transplantation since the first unsuccessful attempts in the late 1960s. Continuing advances in surgical techniques, immunosuppression and the diagnosis of rejection have resulted in improved patient and graft survival, but the optimal timing and method have still to be decided.

Diabetes Mellitus, Type 1↗

111-Indium platelets in monitoring pancreatic allografts in man.

A technique for monitoring pancreatic allografts in man is presented. The method utilizes 111-indium labelled autologous platelets and provides quantitative and qualitative analysis of uptake of the tracer by the graft. Five patients without any significant accumulation of radiolabelled platelets in their transplants had an uneventful recovery and left hospital with satisfactory graft function. The three patients who suffered graft failure showed abnormal uptake of the tracer. This presented as a diffuse platelet accumulation within the transplanted pancreas in the case of acute rejection, or as a focal accumulation in two cases of venous thrombosis. Minor complications such as perigraft haematoma can also be diagnosed using this technique. We suggest that 111-indium labelled platelets provide a valuable diagnostic aid in the management of pancreatic transplant recipients.

Adolescent↗

Biopsy findings in cases of rejection of liver allograft.

Features of rejection were found in 21 needle biopsies obtained from seven patients after liver transplantation. Wedge biopsies taken peroperatively were used as a baseline for comparison. Rejection was diagnosed by excluding other known causes of graft dysfunction using appropriate methods. In cases in which these criteria were fulfilled a consistent picture of rejection was seen, and this was useful in clinical management. Two features constantly present in cases of acute rejection were: a dense mixed portal inflammatory infiltrate; and polymorphonuclear infiltration of biliary epithelium.

Adolescent↗

The current state of liver and pancreas transplantation.

The last 20 years have seen progressive developments in the field of clinical transplantation and in many countries kidney transplantation is now the most cost effective manner of treating renal failure. With increasing technical experience failures have become less common and newer immunosuppressive protocols incorporating cyclosporin A can frequently achieve a graft success rate of over 75% at one year with patient survival over 95%. In addition, the patient receiving a kidney graft attains a high quality of rehabilitation. If renal transplantation has now gained wide acceptance other forms of organ transplantation are still in a phase of development and have not yet reached wide acceptance. It is the purpose of this review to present briefly the current clinical status of two forms of solid organ transplantation being employed in clinical practice.

Adolescent↗