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Biomedical subjects

B Garcia

Publications and source records attributed to B Garcia.

At least 109 records · Page 6Linked to original sources
PubMed1989

Postpubertal cryptorchism. Morphofunctional study with special reference to Leydig's cells.

In a group of 17 patients of postpubertal age with unilateral (n = 15) or bilateral (n = 2) cryptorchism, a significant decrease in the tubular diameter was observed, in addition to Leydig cell hyperplasia (many with cytoplasm vacuolization and/or atrophy) in both the cryptorchid testes and in the contralateral scrotal testes. The number of testosterone-positive Leydig cells in testicular tissue sections, studied with peroxidase-antiperoxidase, was diminished in the cryptorchid testes, whereas in the contralateral scrotal testes it was similar to the control group. Together with normal testosterone levels and elevated luteinizing hormone and follicle-stimulating hormone levels in peripheral blood, this leads us to think of a compensated dysfunction of the Leydig cells. This possible lower testosterone production by the Leydig cells in the cryptorchid testis is not borne out morphologically, where the volume of the organelles is similar to the contralateral scrotal testes.

Adolescent↗
PubMed1989

Patent ductus venosus: problems in assessment and management.

A congenitally patent ductus venosus is the rarest form of portosystemic shunt. Although it occurs in the absence of serious parenchymal liver disease, it may be associated with hepatic encephalopathy. This case report describes a 49-year-old man with a patent ductus venosus who presented with recurrent bouts of encephalopathy but few other features of chronic liver disease. Ligation of the shunt was followed by life-threatening complications. The portal venous system must be carefully assessed before closure of a patent ductus venosus is attempted.

Hepatic Encephalopathy↗
PubMed1989

Mycotic sinusitis: a management protocol.

There has been a recent increase in reported cases of fungal sinusitis. This may be due to better awareness and improved histopathological methods as well as increasing numbers of immunologically compromised patients. We present a case of mycotic sinusitis in an immunocompetent individual to emphasize the clinical features of this disease. The pathology and microbiology are analyzed and a management protocol is discussed.

Aged↗
PubMed1988

Successful intestinal transplantation in pigs treated with cyclosporine.

To date, it has not been possible to reliably prevent intestinal allograft rejection in large animals. This study was undertaken to determine if continuous i.v. cyclosporine (CsA) followed by p.o. CsA would prevent rejection in outbred piglets with orthotopic, in-continuity intestinal allografts. Untreated recipients (n = 7) died of rejection (2), interstitial pnuemontitis (3), or technical complications (2) at 5.3 +/- 1 days. Intestinal recipients treated with i.v. CsA 8 mg/kg/day and i.v. steroids (n = 3) died of rejection (mean survival 11.3 +/- 3.2 days). CsA 20 mg/kg/day i.v. plus i.v. steroids for 21 days, followed by p.o. CsA 25 mg/kg/day (n = 6) prevented rejection; however, most of the recipients developed fatal infections (mean survival 28 +/- 8 days). Intravenous CsA 15 mg/kg/day for 7-10 days (n = 16), followed by p.o. CsA 30 mg/kg/day in tapering doses reliably prevented graft rejection, permitting long-term survival (mean survival 121 +/- 32 days). Rejection did not occur in 7 animals when CsA was discontinued at 97 +/- 11 days. Seven animals surviving more than 100 days maintained normal nutritional indices and gained weight at the same rate as control animals. This study provides a rationale for further experimentation to determine the feasibility of intestinal transplantation in man.

Actuarial Analysis↗
PubMed1979

[Cholestyramine and digoxin intoxication: therapeutic efficacy?].

Plasma levels of digoxin were measured in a patient after massive intoxication. Pharmacokinetic analysis of the data as compared with other cases of digoxin intoxication reveals that in these situations oral administration of cholestyramine may be of benefit to the patient.

Cholestyramine Resin↗
PubMed1978

Adult onset nemaline myopathy.

A 47-year-old man had symptoms of nemaline myopathy for approximately 1 year. There were marked elevations of creatine kinase, a feature not previously described. Examination of the nervous system at autopsy failed to reveal any abnormalities.

Age Factors↗
PubMed1977

[Decrease of intestinal absorption of 47-calcium in chronic alcoholism].

Intestinal 47-calcium absorption has been studied in 34 chronic alcoholics, 17 of whom were cirrhotics (group A) and 17 non-cirrhotics (group B). These patients were compared with 44 normal subjects (group C). In group C, the 47Ca 2 h plasma % of the dose showed a significant negative correlation to the total body weight (p less than 0.001) and a positive correlation with the serum albumin (p less than 0.05). The mean intestinal absorption of 47Ca expressed as 2 h plasma % of the dose multiplied by total body weight was 131 +/- SD 52 in group A and 136 +/- SD 71 in group B. These two means are significantly low (p less than 0.001 and p less than 0.002 respectively) in relation to that found in group C (168 +/- SD 32). These results suggest that intestinal calcium absorption is diminished in chronic alcoholism even in the absence of hepatic cirrhosis.

Alcoholism↗
PubMed1977

[25-hydroxy vitamin D deficiency with reduction of intestinal calcium absorption and bone density in chronic alcoholism].

Plasma levels of 25-hydroxycalciferol (25-OH-D), 47-calcium intestinal absorption, bone mineral content and the biologic parameters of phospho-calcium metabolism were studied in 30 chronic alcoholics, 15 with Laennec's cirrhosis (group A) and 15 without (group B). These patients were compared with 27 normal subjects. In group A, the mean 25-OH-D plasma level was 23.7 +/- SD 18.5 microgram/l and in group B 35.2 +/- SD 21.8 microgram/l. These mean levels were lower than those of the control group, which were 57.2 +/- SD 22.5 microgram/l (p less than 0.001). The mean value of the 47Ca intestinal absorption, measured as the percentage of the ingested dose per litre of plasma and multiplied by the body weight, was also significantly lower in group A, which was 140 +/- SD 47 (p less than 0.01), and in group B, which was 145 +/- SD 69 (p less than 0.05), compared with the normal subjects whose average was 182 +/- SD 45.6. Similarly, the total plasma calcium was low: 1.99 +/- SD 0.24 mmol/l in all the alcoholics, while that of the control group was 2.22 +/- SD 0.18 mmol/l (p less than 0.001). For the 30 chronic alcoholics there was a positive correlation between 25-OH-D and 47Ca intestinal absorption, (r = 0.484; p less than 0.004). This suggests that in chronic alcoholism the deficiency of 25-OH-D induces a diminution of the intestinal absorption of calcium which, in the long term, can result in bone demineralization evidenced in the patients studied by a bone mineral content lower than normal (p less than 0.001).

Adult↗
PubMed1977

[Study of vitamin D deficiencies in the aged].

Plasma levels of 25-hydroxycalciferol (25-OH-D) and the biological parameters of phosphocalcium metabolism were determined in 55 patients institutionalized in a geriatric hospital in Geneva. They were compared with two control groups, one of the same age and the other younger. The mean plasma 25-OH-D level of the hospitalized patients was 22.7 +/- SD 13.6 microgram/l, which is significantly lower (p less than 0.001) than the mean level obtained from both the control group of the same age (46.2 +/- SD 20.1 microgram/1 25-OH-D) and the control group of young subjects (48.6 +/- SD 16.8 microgram 25-OH-D/1). Among the 55 hospitalized patients, 27 (49%) had a deficient 25-OH-D plasma level lower than 20 microgram/1. Compared to the control group of the same age, the group of hospitalized subjects had lower mean plasma level of inorganic phosphate (27.1 +/- SD 4.34 mg/1; p less than 0.01) and an elevated mean plasma level of alkaline phosphatase (46.9 +/- SD 16.5 UI/1; p less than 0.005). For those 27 patients deficient in 25-OH-D, a positive correlation exists between the plasma values of 25-OH-D and the total calcium (r = 0.584). The high incidence of biological indicators of osteomalacia found in the group of hospitalized patients suggests that vitamin D deficiency is a current problem of the elderly in Switzerland necessitating a review of the prophylactic measures now in use.

Adult↗