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Biomedical subjects

G L Barbour

Publications and source records attributed to G L Barbour.

31 records · Page 2Linked to original sources
PubMed1978

Hemosiderosis secondary to chronic parenteral iron therapy in maintenance hemodialysis patients.

Autopsy data on 24 chronic maintenance hemodialysis patients who had received varying doses of parenteral iron as the iron-dextran complex were reviewed for evidence of iron overload (hemosiderosis) and tissue fibrosis or organ dysfunction (hemochromatosis). Hemosiderosis was frequent in patients who received high total doses of iron but absent in those who received little or no iron. The degree of tissue iron did not increase with increased iron administration above a total of 2.5 g. Hemochromatosis or organ dysfunction secondary to tissue iron deposition was not noted in any patient. Chronic parenteral iron administration may improve anemia and result in tissue iron deposition but does not lead to hemochromatosis.

Adult↗
PubMed1978

In vitro permeability studies of peritoneal (P), cuprophan (C), and polycarbonate (PCM) membranes.

A unique dialysis device was developed to allow direct comparison of permeability characteristics of different membranes to various solutes under identical conditions. Studies with Cuprophan (CM), polycaronate (PCM), and peritoneal membrane (P) yielded the following results: 1. PCM is similar to CM in permeability to low molecular weight solutes. 2. PCM is significantly more permeable to middle molecular weight substances than CM or P. 3. P is more permeable to middle molecules than CM.

Animals↗
PubMed1977

Parathyroid autotransplantation.

Autotransplantation of the parathyroid to the forearm has been performed in eight patients following total or subtotal parathyroidectomy. The mass of gland implanted was approximately one half that used in other series. Bilateral simultaneous parathormone levels drawn at three months after autografting several higher levels in the autografted arm in every patient examined. Replacement calcium and vitamin D therapy were withdrawn from two patients within eight months after transplant, and it is anticipated that all patients will be off maintenance at 12 months. Electron and light microscopy of grafted tissue has revealed viable glands with intracellular secretory granules, many mitochondria, and little fat. Indications for autotransplantation include patients with refractory renal osteodystrophy, reoperations for primary hyperparathyroidism, and extensive extirpative cancer surgery of the head and neck.

Biopsy↗
PubMed1977

Failure of histidine supplementation to improve anemia in chronic dialysis patients.

Failure of histidien supplementation to improve anemia in chronic dialysis patients was seen in six patients after a study period of 8 weeks. Serum amino acid levels were elevated to normal by supplementation with 1 g of oral histidine/day in all patients. There was no significant change in serum iron or transferrin levels, hematocrit, or red cell mass in five of the six patients. Histidine supplementation may raise serum amino acid levels, but does not cause any increase in red cell mass or improve the anemia in patients on chronic dialysis who are ingesting adequate dietary protein.

Adult↗
PubMed1976

Hyperlipidemia due to oxymetholone therapy. Occurrence in a long-term hemodialysis patient.

Marked hypertriglyceridemia and hypercholesterolemia accompanied by angina and a left cerebral thrombosis occurred in a long-term hemodialysis patient following 5 1/2 weeks of oral treatment with oxymetholone, 100 mg/day, a synthetic androgen. After androgen therapy was discontinued, over a three-month period, plasma lipid values progressively decreased below pretreatment values, and clinical symptoms disappeared. During rechallenge with oxymetholone, serum lipid values increased substantially, and the lipoprotein pattern changed from a type IV to a type V. Detailed lipid studies showed subnormal postheparin lipolytic activity and a fast-migrating pre-beta-lipoprotein in a very-low-density lipoproteins (VLDL) fraction. Because of the data linking lipid abnormalities to atherosclerosis and the acceleration of atherosclerosis in long-term hemodialysis patients, great caution should be exercised in administering androgenic steroids to these patients.

Acute Kidney Injury↗
PubMed1976

Comparison of inulin, iothalamate, and 99mTc-DTPA for measurement of glomerular filtration rate.

Clearances of inulin, 125I-iothalamate, and 99mTc-Sn-DTPA were measured simultaneously in five mongrel dogs exhibiting a wide range of glomerular filtration rates (GFR). Standard constant-infusion inulin clearance was compared to radionuclide clearances after subcutaneous injection of the emitters mixed with aqueous epinephrine. All three substances were found to have virtually identical clearances. The accuracy, accessibility, low cost, low radiation hazard, and short half-life of 99mTc-Sn-DTPA make it an excellent substance for measuring GFR. The subcutaneous technique offers an accuracy comparable to the more difficult constant-infusion method.

Animals↗
PubMed1975

Tuberous sclerosis complex and renal angiomyolipoma. Collective review.

Numerous case reports of renal angiomyolipoma with or without tuberous sclerosis continue to be published with increasing frequency in the urologic literature. The need for a comprehensive and updated review of the subject is timely. A collective pathologic, clinical, and radiologic review of the subjects of tuberous sclerosis complex and renal angiomyolipoma is presented; and a plan for the urologic management is discussed.

Blood Vessels↗
PubMedDate not supplied

Malnutrition and hospital prognosis in the alcoholic patient.

The nutritional status of 65 alcoholic patients admitted to the Medical Service of a Veterans Administration Hospital was evaluated and compared to that 87 nonalcoholic patients admitted during the same period of time. There was no statistical difference in the prevalence of malnutrition in the alcoholic population (36.9%) when compared to the nonalcoholic population (43.7%). The death rate and incidence of infection were similar in both populations as was the prevalence of anemia, depressed total lymphocyte count, and skin test anergy. Malnutrition, however, correlated with an increased death rate and incidence of infection, regardless of whether the patient was an alcoholic or not.

Alcoholism↗