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Biomedical subjects

S Jaeger

Publications and source records attributed to S Jaeger.

17 recordsLinked to original sources
PubMed1991

Technical application of stereotactic irradiation in malignant brain tumors.

This study reports the technical application of stereotactic interstitial brachytherapy for malignant gliomas in two groups of patients. Group I consisted of 2 patients who had undergone previous debulking brain surgery; group II were 3 patients who were not candidates for craniotomy because their tumors were surgically inaccessible. The stereotactic implantation technique in group I was somewhat complicated due to the irregular shape of the residual tumor masses. Sophisticated pre-implantation planning was necessary for adequate coverage of the entire tumor volume. In this series, inoperable tumors were also successfully implanted with excellent results.

Brachytherapy↗
PubMed1990

The position of delusional parasitosis in psychiatric nosology and classification.

Discussions on the nosological position of delusional parasitosis (DP) have resulted in a wide range of opinions. In the present study in 34 patients with DP, the various and contradictory opinions concerning DP positioning in psychiatric nosology were examined through clinical, psychopathological, and polydiagnostic analyses using VRC, DSM-III, DSM-III-R and ICD-9. The psychopathological analyses with VRC as well as the polydiagnostic comparisons with other classification systems indicated that DP is neither a nosological entity nor due to a specific psychiatric illness. As our results showed, DP is a nosologically unspecific syndrome, which may occur superimposed on all psychiatric disorders.

Delusions↗
PubMed1989

Angiogenesis and hemodynamics of microvasculature of transplanted islets of Langerhans.

Transplantation of isolated islets of Langerhans is frequently followed by early loss of islet function. Because whether this is caused by insufficient vascularization or graft rejection is unknown, angiogenesis and microvascularization of islet grafts were studied in vivo by means of intravital microscopy. After transplantation of syngeneic islets in hamster dorsal skin-fold chambers, 97% (n = 66) of the islets exhibited the first signs of angiogenesis at days 2-4, characterized by sinusoidal sacculations and capillary sprouts. After 10 days, angiogenesis was completed, consisting of a microvascular network similar to those of islets in situ: arterial supply, afferent and efferent capillary loops, and venular drainage. Functional density of microvessels was 700.1 +/- 127.0 cm-1, and erythrocyte velocity was 0.58 +/- 0.35 mm/s. Intracellular insulin was demonstrated immunohistochemically. Electron-microscopic studies revealed normal fine structure of the capillary wall. The model allows in vivo analysis of microvascular phenomena occurring in host-vs.-graft reaction after allogeneic and xenogeneic islet transplantation. Furthermore, it may be used to quantitatively assess immunosuppressive regimens.

Animals↗
PubMed1988

Multiple myeloma in central and northern Norway 1981-1982: a follow-up study of a randomized clinical trial of 5-drug combination therapy versus standard therapy.

In a randomized study of 92 previously untreated patients with multiple myeloma, the intention was to document the possible beneficial effect of combination chemotherapy including vincristine, carmustine, alkylating agents and prednisone, as compared to conventional therapy with melphalan and prednisone. Major prognostic factors did not differ significantly between the treatment groups. With the 2-drug therapy and 5-drug combination therapy, 48 and 54% of the patients achieved remission, respectively. Median survival for patients treated with the 2-drug regimen and 5-drug regimen was 29 and 33.5 months, respectively. No significant difference was found between the survival curves for stage III patients treated with the two regimens. After 12 months, patients who had achieved remission were randomized to have treatment discontinued or to have maintenance treatment. The numbers of relapses, remission duration and survival of the two groups were similar.

Actuarial Analysis↗
PubMed1985

Piretanide, a potassium stable diuretic, in the treatment of essential hypertension: a double-blind comparison of two formulations.

In a randomized double-blind parallel group study the effects of two formulations of piretanide (standard tablet and slow-release capsule) were compared in patients with mild to moderate essential hypertension. Forty patients entered the study and thirty-seven completed it. Both formulations of piretanide produced a significant reduction in erect and supine blood pressure which was evident at 2 weeks and was maintained and further enhanced over the ensuing trial period. A mean maximal fall in supine diastolic pressure of 22% was observed in the piretanide tablet group, and of 20% in the slow-release piretanide group. Blood pressure fell more quickly at the beginning of treatment with the tablet preparation, such that there was a significant difference between the groups up to the fourth week. After this point the blood pressure lowering effect was very similar in both groups and there was a progressive reduction in supine blood pressures over the 12-week active-treatment period. Slow-release piretanide produced a smoother effect than the tablet formulation. There were no significant changes in serum potassium and serum magnesium in either treatment group. Minor changes were seen in some other biochemical and haematological variables but these were of no clinical significance. Three patients were withdrawn from the study because of side-effects: one because of an excessive antihypertensive response to the tablet formulation; and two because of allergic reactions to the slow-release preparation. Side-effects were otherwise mild and infrequent.

Adult↗
PubMed1985

The effects of piretanide, a potassium stable diuretic, on serum electrolytes in patients with congestive heart failure.

In a randomized double-blind, parallel group study, the effects of piretanide on serum electrolytes and on symptoms of congestive heart failure were compared with those of the combination piretanide plus triamterene in out-patients with mild to severe congestive heart failure. A total of 60 patients entered the study; 13 patients were excluded from the statistical analysis (4 due to premature end of the study, 2 due to dose increase, 7 due to concomitant medication (antihypertensive or antihypotensive agents), so that the results of 47 patients were statistically analyzed, 26 of them in the piretanide and 21 of them in the piretanide plus triamterene group. Piretanide (6 mg once daily) and piretanide plus triamterene (6 mg + 50 mg once daily) both produced a significant reduction in certain symptoms of congestive heart failure which was evident at 2 weeks and was maintained and further enhanced over the ensuing 12-week trial period. Improvement in a number of symptoms of congestive heart failure was attained in 54% of the patients in the piretanide group and 67% in the piretanide plus triamterene group. This difference, however, was not clinically relevant, since the symptoms which are expected to improve in this short time showed no great difference between the two groups. There were no significant changes in serum potassium and serum magnesium within groups or differences between the groups. There were decreases in serum sodium, calcium and inorganic phosphorus in the piretanide plus triamterene group. In the piretanide group, only a temporary drop in inorganic phosphorus was observed.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1984

Silicone implants in dogs. A ten-year histopathologic study.

The biocompatibility of implanted materials is important to the successful long-term results obtained in reconstructive surgery with these materials. Recently, interest has emerged regarding host response to the wear debris of implanted material. Since 1962 flexible implant materials have been studied in the Orthopaedic Research Department at Blodgett Memorial Medical Center. An important aspect of this study has been a concern for host tolerance and the evaluation of biologic responses to implanted silicone elastomer. Three dogs in which implants of silicone elastomer had been in place for more than ten years were carefully studied by complete autopsy. A benign foreign-body giant cell response to local silicone wear debris was observed. No silicone particles or macrophage giant cell reactions were found in any distant organs. The host response to silicone wear debris was benign, and no adverse systemic influences were noted.

Amputation Stumps↗
PubMed1980

Deposition of human labeled platelets to damaged rabbit aorta before and after use of sulfinpyrazone in patients with acute myocardial infarction.

Platelets from patients with acute myocardial infarction were labeled with 51Cr and reconstituted whole blood. The endothelium of rabbit aorta was removed, and segments of the inverted aorta placed on a Plexiglas rod in a perfusion chamber, and the deposition of platelets on the aorta was calculated by radioactivity measurement. In all 8 patients the deposition of platelets was reduced after ingestion of 800 mg of sulfinpyrazone daily for 4 weeks.

Animals↗
PubMed1979

Platelet function and serum high density lipoproteins.

Two groups of healthy male subjects one with low (mean 1.03 mmol/l), and the other with normal (mean 1.80 mmol/l), concentrations of high density lipoprotein (HDL) cholesterol in plasma were investigated. A series of in vitro platelet function tests were performed in order to investigate a possible connection between low HDL concentration, which has been defined as an independent risk factor for the occurrence of CHD, and disturbances in platelet function. No significant differences in platelet function were observed between the two groups. A positive correlation was found between platelet factor 3 activity both in platelet rich and platelet poor plasma and the plasma concentration of HDL.

Adult↗
PubMed1979

Deposition of human labeled platelets on damaged rabbit aorta before and after ingestion of acetylsalicylic acid.

Human blood platelets were labeled with 51Cr and whole blood was reconstituted. The endothelium of rabbit abdominal aorta was removed with a balloon catheter and the inverted aorta was placed on a Plexiglas rod in a perfusion chamber. The reconstituted blood was perfused through the chamber of 10 min. Radioactivity of the aorta was measured and found to be mainly caused by the labeled platelets. The platelet deposition on the damaged aorta was measured before and after ingestion of 0.5 g acetylsalicylic acid twice a day for 1 week, and was found to be reduced after the use of this drug.

Adult↗
PubMed1978

Myelomatosis terminating in acute myelogenic leukaemia.

A case of acute myelogenic leukaemia developing after 7 months treatment with alkylating agents for multiple myeloma is reported. The patients was also given irradiation for an expansive process in the thoracic column. By immunofluorescence staining of the bone marrow cells there was no evidence for production of pathological globulins in the blast cells, while the plasma cells contained IgA, kappa.

Alkylating Agents↗
PubMed1975

The effect of noradrenalin infusion on plasma and platelet lipids and platelet function in man.

Noradrenalin was given as an intravenous infusion in a dosage of 0.1 mu-g/kg/h over a period of 30 minutes to 5 healthy male subjects. Blood samples were collected before, at the end of and 24 hours after the infusion. A significant increase in the number of circulating platelets and a marked increase of plasma FFA, reflecting an increase of all the main components of the FFA fraction were observed. No significant changes were observed in the similar lipid fraction in platelets and except for a moderate increase in platelet factor 3 activity, no significant changes in other platelet function tests were present.

Adult↗
PubMedDate not supplied

Therapeutic response of human lung tumour xenografts to cyclophosphamide.

The effect of cyclophosphamide, given as a single i.p. injection (240 mg/kg) on 13 various fast growing human lung tumours, transplanted and passed serially in athymic nude mice, were studied. Cyclophosphamide showed activity against all tumours studied. The sensitivity of the different tumour lines tested varied considerably. The faster a tumor was growing, the more pronounced was the inhibitory effect of cyclophosphamide on growth, independent of the histological type. If different lung tumours were treated at the same size and site (8-10 mm, s.c. right anterior flank), growth rate was a factor of decisive importance for the sensitivity of a tumour to cyclophosphamide.

Animals↗