The isoprostane 8-epi PGF2alpha is a vasoconstrictive, mitogenic, proliferative, and mild proaggregatory agent. We examined 8-epi-PGF2alpha and 6-oxo-PGF1alpha from venous tissue derived from varicose (venous) surgery by means of a specific radioimmunoassay. A total of 336 samples from 82 patients (50 females, 32 males; aged 22-68 years) were examined. Tissue samples were classified according to normal, dilated, and varicose. Of these, 94 samples from 31 patients (20 females, 11 males; aged 29-64 years) with additional risk factors (cigarette smoking, hyperlipidemia, diabetes mellitus) were determined in the same way. Mean absolute values for 6-oxo-PGF1alpha are not significantly higher for dilated segments followed by varicose and intact samples. No significant age and sex differences can be monitored. Presence of risk factors, however, results in a significantly diminished 6-oxo-PGF1alpha, irrespective of morphology. 8-Epi-PGF2alpha again showed no age and sex dependence, its presence in varicose segments, however, was significantly (p<0.01) decreased. Risk factors resulted in a significantly increased 8-epi-PGF2alpha. These data indicate that the influence of risk factors on vasomodulatory (iso-)eicosanoids of human veins is more pronounced than the actual morphologic stage. Lower 8-epi-PGF2alpha in varicose veins may shift the venous tone toward vasodilatation and contribute to development and progression of varicosis.

6-Ketoprostaglandin F1 alpha↗

PubMedDate not supplied

[Fibrinolytic activity of the vein wall].

The author reviews this classically held opinion, that the older sclerosants cause coagulation of the blood, while the newer sclerosants bring about an endothelial change which itself generates a thrombus. He attempts to analyse the clotting activity of the vein wall before and after the sclerosant injection. The first series of experiments gave the impression that the walls of veins subjected to a sclerosant injection had an increased fibrinolytic activity, in comparison with untreated veins. It was noted that this increase in activity was not permanent but transient. Further studies have shown that this interpretation may be premature, since there are several possible sources of error. A new series of experiments is in progress, and it would be premature to draw conclusions.

Fibrin↗

PubMedDate not supplied

[Limitations of venous function diagnosis using laboratory apparatus - possibility of errors].

The authors discuss some questions concerning the limitations and the errors of methods involving the Sonar Doppler, Plethysmography and Phlebodynamics in phlebology diagnosis. The Doppler technique is the most useful one in detecting a valvular insufficiency or a venous obstruction of the thigh. Plethysmography is a simple method of detecting a pelvic or femoral thrombosis. It does not make it possible, on the level of the calf, to make a distinction between a recent thrombosis or a post-thrombotic state. It cannot be used when there is a large edema. It is inadequate for studying the function of the muscular pump of the calf, which can also be done by phlebodynamics. This method is now the most precise technique for quantitatively studying the total function of the muscular pump of the calf. It can be easily reproduced, and the effect of therapeutic measures can thus be anticipated.

Doppler Effect↗

PubMedDate not supplied

[Sclerosis of the arch].

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Blood Coagulation↗