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Biomedical subjects

I Fraser

Publications and source records attributed to I Fraser.

At least 91 records · Page 5Linked to original sources
PubMed1987

Evidence that the gene for tuberous sclerosis is on chromosome 9.

Linkage analysis was undertaken in nineteen families with tuberous sclerosis by use of 26 polymorphic markers. All affected members fulfilled strict diagnostic criteria and unaffected members were rigorously investigated to confirm their status. Maximum lod scores were 1.20 for adenylate kinase 1 (AK1) at zero recombination and 3.85 for the ABO blood group at zero recombination (confidence limits 0-0.10). These findings support the assignment of the gene for tuberous sclerosis to the distal long arm of chromosome 9.

Adenylate Kinase↗
PubMed1986

The vasoactive properties of ascitic fluid in acute pancreatitis in a porcine model.

The hemodynamic effect of pancreatic ascitic fluid was studied in a porcine model. Pancreatitis was induced by a low-pressure infusion of trypsin and taurocholate sodium into the pancreatic duct. The ascitic fluid that accumulated was then injected into the inferior vena cava of five pigs, with each pig receiving five infusions at 40-minute intervals. Mean arterial blood pressure and peripheral vascular resistance fell with each infusion, while pulmonary artery pressure increased. The magnitude of the drop in arterial blood pressure decreased with subsequent infusions, suggesting tachyphylaxis. The rise in pulmonary artery pressure increased with successive infusions. Anesthesia artifact and decay of the pancreatic ascitic fluid were ruled out as causes of the tachyphylaxis. Filtration separated the substances producing pulmonary effects and systemic blood pressure effects (0.2 to 11 microns vs 10,000 daltons to 0.2 micron). These data suggest that two mediators may produce the hemodynamic effects of pancreatic ascitic fluid.

Animals↗
PubMed1986

Medicare reimbursement for hospice care: an approach for analyzing cost consequences.

The federal impact in health policy, as in most public policy areas, is generally large but indirect. Private choices, based on rational or sometimes irrational individual and institutional concerns, are the intervening variables, and policy analysts generally have inadequate information about how these variables operate. The new Medicare reimbursement for hospice care, the only new human service benefit passed by the 97th Congress, provides an example of this problem. This paper uses the results of a 1984 survey of hospices to create a model to analyze one such set of intervening variables: provider decisions about how, and whether, to participate in the new Medicare hospice benefit. Our analysis provides a rationale for the substantially lower-than-expected provider participation rate.

Centers for Medicare and Medicaid Services, U.S.↗
PubMed1985

Menstruation, menstrual protection and menstrual cycle problems. The knowledge, attitudes and practices of young Australian women.

The results of a survey of 1377 young Australian women aged 14 to 19 years, conducted to determine their attitudes, state of knowledge and practices with regard to menstruation, are presented. The young women, as a group, lacked sufficient information about menstruation, about the time of ovulation, about menstrual discharge, and about the use of tampons. A high proportion (80%) considered menstruation to be inconvenient or embarrassing. Certain measures aimed at remedial action are suggested.

Adolescent↗
PubMed1985

Testicular torsion does not cause autoimmunization in man.

Forty-seven patients have been reviewed 2-10 years after torsion of the testicle. Thirty-six (77 per cent) were found to have abnormalities of exocrine or endocrine gonadal function. None showed evidence of testicular autoimmunization using standard assays of sperm agglutination and immobilization by serum or seminal plasma, and the serum mixed agglutination reaction (MAR) test. In addition, 11 cases of acute torsion were followed at intervals for 3-6 months after surgery, but no evidence was observed of the transient development of sperm antibodies. Our findings confirm poor gonadal function after torsion, but do not support the recent suggestion that it is caused by autoimmunization.

Adolescent↗
PubMed1985

Medicare reimbursement for hospice care: ethical and policy implications of cost-containment strategies.

In several areas of health policy, current concern over rising costs has generated considerably political support for reforms that many in the business have advocated unsuccessfully on philosophical, ethical, or humanitarian grounds for years. Thus, for example, the spiraling cost of caring for the mentally ill and the developmentally disabled in an institutional setting has breathed new life into proposals to bring these groups out into the community where they can live more independently--and more cheaply. But this overlap of quality and frugality goals is only partial. Although alliances with cost-cutters can bring reform, health policy reformers are discovering that they may have to accept a lot of bathwater along with the baby. Medicare reimbursement for hospice care, authorized by Section 122 of PL 97-248, the Tax Equity and Fiscal Responsibility Act of 1982, provides one recent example of this dilemma. This article discusses the results of a survey--conducted by the Office of the Inspector General of the Department of Health and Human Services--to discover how many hospices would seek certification for reimbursement by Medicare, how many patients would be served, and the consequences of this legislation for cost, access, and quality of service.

Aged↗
PubMed1984

The management of common bile duct calculi by endoscopic sphincterotomy in patients with gallbladders in situ.

Endoscopic sphincterotomy (ES) is widely used in the treatment of patients with common bile duct (CBD) stones following cholecystectomy. The technique has now been extended to patients with gallbladders still present and the results of ES in 100 such patients is reported. Fifty-nine were considered unsuitable for surgery (Group A), in 38 ES was performed as a preliminary to cholecystectomy (Group B) and in 3 ES was performed following emergency cholecystostomy (Group C). ES was achieved in 98 patients and stones completely extracted in 91 patients. In Group A 5 patients required surgery, in 3 because of technical failure and in 2 because of empyema of the gallbladder. One patient who presented in extremis died following failure to extract a large CBD stone. On follow-up (4-50 months), 16 patients have died but in only one from gallbladder sepsis, and one has had a cholecystectomy for pain. In Group B choledochotomy was avoided in 29 of the 37 patients who agreed to cholecystectomy. In Group C no further surgery was required and all patients in Groups B and C remain well. These results indicate that ES is an effective technique for treating patients with CBD stones with the gallbladder in situ, either alone in patients considered unsuitable for surgery or as an adjunct to surgery.

Aged↗
PubMed1984

The intravenous intralipid tolerance test.

The half-life of an intravenously injected bolus of intralipid 20% was measured in normal rats in order to asess its relationship to reticuloendothelial system (RES) activity. Groups of animals were studied following various treatments, and the results compared to measurement of carbon clearance in similar groups. The RES effects of silica and C parvum were confirmed by the carbon clearance test, but no effect was seen on the half-life of intralipid. Intralipid clearance was shortened by fasting and the administration of intravenous heparin, neither of which affected carbon clearance. It is concluded that the intravenous intralipid test has no place in the asessment of RES function.

Animals↗
PubMed1984

Routine cross-matching is not necessary for a transurethral resection of the prostate.

Two hundred and fifty-five consecutive patients undergoing transurethral prostatectomy were studied prospectively to test a policy of not routinely cross-matching blood. Blood was ordered only for patients with anaemia, a major medical risk factor, a prostate gland estimated to be greater than 60 g, or the presence of red cell alloantibodies. Of the 203 patients who were "grouped and saved" only, 30 (12%) were subsequently cross-matched and 22 (8.5%) transfused. There were no significant problems as a result of the operation of this policy. The value of these pre-operative criteria for cross-matching was confirmed, apart from the clinical estimation of prostatic size. The use of such a policy could be of significant value to the hospital blood transfusion services.

Aged↗