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[Von Willebrand factor activity and thrombophilic states. A review (author's transl)].

After a brief survey of some physiologic properties of Von Willebrand factor activity (VIII r WF) the numerous clinical states with an increase of this activity are described. The authors report their own results concerning sepsis, chronic arteritis of lower limbs, diabetes, toxemia of pregnancy. In most cases the increase of VIII r WF activity appears as a sign of vascular injury and/or the consequence of tissular damage.

Arteriosclerosis↗

Alpha 1-antitrypsin in amniotic fluid.

Amniotic fluid a1-antitrypsin values were determined by radial immunodiffusion of 317 samples obtained between the 10th and 43rd weeks of gestation in normal pregnant patients and those with complications. Serial determinations of a1-antitrypsin values revealed that in normal patients values decreased as pregnancy advanced while values increased as pregnancy advanced in cases in which there was severe Rh-alloimmunization and hydramnios. A wide range of values was observed for each week of gestation. Although there was a definite tendency for values to decrease as pregnancy advanced (60.8 mg/100 ml before 30 weeks and 17.9/100 ml after 40 weeks); the method must be regarded as unreliable for determining fetal maturity in clinical practice. In the case of newborn infants with hyaline membrane disease, no decrease in amniotic fluid a1-antitrypsin values has been found.

Amniotic Fluid↗

[Comparative examinations of high-molecular maternal serum protein bodies during pregnancy--a contribution to biochemical pregnancy control (author's transl)].

The maternal Serum concentrations of beta 1 SP 1, IgM and alpha 2-macroglobulin were determined in relation to the gestation age, using the simple radial immunodiffusion method in 102 non-pathologic pregnancies and 35 pregnancies involving risk factors. To assess the clinical relevance of these determinations, we examined to what extent the changes in concentration of beta 1 SP 1 IgM and alpha 2-macroglobulin would permit a prognostically useful conclusion on the placenta function and foetal condition. All patients with lowered beta 1 SP 1-serum concentrations were examined for their antepartua CTG-evaluation, as well as the type of termination of parturition. The normal distribution for beta 1 SP 1 showed a continuous rise in serum concentration up to the 37th pregnancy week. During the last 3 weeks, beta 1 SP 1 remained almost constant. For the cases with EPH-gestosis and placenta insufficiency, a beta 1 SP 1-concentration below the normal distribution level was found in the large majority of all cases. In diabetes mellitus during gravidity, twin gravidity and MHN, the determination of beta 1 SP 1 is not of any decisive prognostic significance. The maternal serum levels of IgM showed no significant differences when comparing normal pregnancy and risk pregnancy. The serum concentration of alpha 2-macroglobulin increased in both groups of patients with increasing gestation age. Of the three examined protein bodies, we consider beta 1 SP 1 to be a good, additional parameter for the assessment of the trophoblast function.

Female↗