English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The complications of varicose veins are well known, but the etiology of these complications has never been satisfactorily explained. Many more or less plausible statements as to the causes of varicose ulcer, for example, have been offered. One of the most persistent concepts has been that the incompetence of the valves of the leg veins is followed by venous stagnation, and venous stagnation by anoxia of the region; this renders the tissues more susceptible to trauma and ulceration. The question remains, why do ulcers develop in one case but not in another? Evidently several factors are involved. This study was designed to add objective information regarding alterations of physiological processes which may be responsible for the complications associated with varicose veins. deTakats and his coworkers (1) and Blalock (2) have studied the oxygen tension of the blood found in varicose veins, to obtain data concerning the pathology associated with these abnormal veins. deTakats found the oxygen content distinctly lower in varicose veins of the leg than in the antecubital veins of the arm. This is hardly a fair comparison. Blalock found ". . . in nine of the ten cases observed, the oxygen content of the blood from the femoral veins was higher on the diseased side . . . than on the opposite side." He stated, " No definite relationship seems to hold between the oxygen content of the blood of the dilated veins of the lower part of the leg and similarly located normal veins of the opposite leg.

the journal of clinical investigation/the journal of clinical investigation

STUDY OF THE TENDENCY TO EDEMA FORMATION ASSOCIATED WITH INCOMPETENCE OF THE VALVES OF THE COMMUNICATING VEINS OF THE LEG. OXYGEN TENSION OF THE BLOOD CONTAINED IN VARICOSE VEINS