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Biomedical subjects

B Gehrmann

Publications and source records attributed to B Gehrmann.

3 recordsLinked to original sources

[An experimental contribution to the epizootiology of viral hemorrhagic septicemia of rabbits (rabbit hemorrhagic disease, RHD)--transmission by flies].

In experiments adapted to natural conditions it was established that--a conjunctival infection with about 100 RHD-virus particles was successful--in a milieu without flies transmission over a distance of only 50 cm did not take place--iridescent flies (Phormia spp.) seven hours after contamination with RHD-virus material from died rabbits transmitted RHD to susceptible rabbits in an isolated cage. It ist supposed that transmission in this way will be an epizootiological important one for spreading in narrow distances.

Animals↗

[Avoiding cesarean deliveries by intravenous prostaglandin E2 administration (PGE2)].

The study reported here was prompted by the question whether caesarean deliveries which would otherwise be necessary can be avoided by intravenous infusion of prostaglandin E2 (PGE2). The authors consider intravenous administration of PGE2 during delivery to be indicated in cases which fail to respond to therapy after three local cervical maturation attempts and in standstills where oxytocin has no effect. Out of a total of 5835 women who gave birth at the Obstetrics Department of the Berlin-Neukölln Gynecological Clinic between 1980 and 1981, those who had been given intravenous infusions of PGE2 were identified and a check was made to establish whether this treatment offers any advantages. PGE2 infusion after unsuccessful intracervical application of PGE2 gel: Out of 1122 risk patients in whom cervical maturation prior to induction of birth appeared desirable, 43 (3.8%) still had a Bishop Score of less than or equal to 7 after three local applications of PGE2 gel. Attempts to achieve a vaginal delivery in spite of this, by means of PGE2 infusion, were successful in 60% of the cases. The mean rate of PGE2 infusion was 1.1 +/- 0.3 microgram/min. Four women were given oxytocin in addition, in an average dose of 9.3 +/- 1.1 mU/min. The average duration of labour was 10 hours 30 min. Complications in mother and child occurred no more frequently than in other risk births. PGE2 infusion in cases with standstill not responding to oxytocin treatment: In 82 parturients (1.4%) a standstill occurred during labour after initially normal dilation of the cervix, and could not be overcome by administration of oxytocin.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗

[Compression tests on the human hip joint (author's transl)].

Three human pelvises were subjected to static loading in the course of the experiments. The values determined for the elasticity modules lie between 2 and 4.5 kp/min2. The values range between 5 and 14 kp/mm2 if only the compacta is considered. The experiments show that the elasticity modules obtained at cross sections through the Os coxae are higher than those for sections through the hip joint and its immediate surroundings. Here the elasticity module reaches the minimum value of 0.77 kp/cm2 (Fig. 1, cross section No.2, Table 3). The highest breaking strain was 1045 kp (Pelvis II). The longitudinal contraction of the three pelvis was 26.6 mm on average. For the mean height of 27.2 cm for the specimens used, this means that the pelvis, as a system (with hip joint) can be reduced in length by about 10% before a fracture occurs under static load conditions.

Biomechanical Phenomena↗