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Biomedical subjects

P H Arva

Publications and source records attributed to P H Arva.

3 recordsLinked to original sources
PubMed1998

[Health of the pilots and flight safety].

Pilots and other aviation personnel meet physicians on different terms depending on the purpose of the medical consultation: Whether it is a periodical medical examination by an appointed medical examiner required for renewal of flight licence, or whether the pilot consults the physician on a health problem. The physician has different roles in these two types of consultation. This article is a short introduction to physicians outside the aviation community on health problems among pilots with regard to flight safety.

Aerospace Medicine↗
PubMed1982

Enzymatic characteristics of tubular adenomas and carcinomas of the large intestine.

Enzymes activities in homogenates of the large intestine were measured in biopsies from 11 tubular adenomas and six carcinomas and from the corresponding normal mucosa of each individual. A similar and significant increase was found in the total activities of glucose-6-phosphate dehydrogenase (G 6 PD), pyruvate kinase, and lactate dehydrogenase in adenomas and carcinomas as compared with the levels of normal mucosa. The lactate dehydrogenase isoenzyme patterns showed also a marked and similar change in the adenomas and carcinomas with a significant increase of lactate dehydrogenase M-monomers. Most of the adenomas showed slight to moderate dysplasia. The results indicate that the measurement of total G 6 PD, pyruvate kinase and lactate dehydrogenase activities for screening purposes has no predictive value in separating non-premalignant from premalignant adenomas. Moreover, it seems that the enzymatic characteristics of malignancy are present even in tubular adenomas. This is in agreement with the theory of a polyp-cancer sequence.

Adenoma↗