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Biomedical subjects

G Neumann

Publications and source records attributed to G Neumann.

At least 145 records · Page 8Linked to original sources
PubMed1977

[Formation of autologous spongiosa in bone layers as a function of revascularization].

In 24 sheep standardized holes were drilled into the tibia. These defects were filled differently with autologous cancellous bone: a) The defect was filled only with cancellous bone or b) it was filled like in (a) but additionally covered by a Milliporefilter layer; c) the defect was filled like in (a) but the bottom of the defect was covered by a Milliporefilter layer or d) it was filled like in (a) but the cancellous bone was sandwiched by Milliporefilter layers. Bine remodelling was adversely influenced by the Milliporefilters, but the inhibition in (b) was two times bigger than in (c).

Animals↗
PubMed1977

[Cold preservation of human sperm].

The authors report the development and investigation of a new technique for freezing and storage of human spermatozoa. Utilizing isolated container of different kind the average rate of freezing was between 1,3 grd/min and 14 grd/min in the sphere from 5 degrees C to--10 degrees C and between 2,9 grd/min to 55 grd/min in the sphere from--10 degrees C to--60 degrees C. The technical expense was low. Semen specime were provided by 33 andrological patients. A total of 53 samples of human semen were frozen and stored for periods of time up to 25 days. The authors used the cryoprotective medium from Behrman and Sawada. The best results were obtained in the mode of freezing at 2,8 grd/min respectively 12 grd/min in ejaculates of original motility about 80%. The recovery of motility and fertilizability of spermatozoa was 50% of original motility, in cases of oligospermia only 34%. The results of this new technique of freezing and storage of human spermatozoa are similar to other new reports in literature.

Freezing↗
PubMed1976

[Occult blood in stool. A field trial in cancer screening (author's transl)].

4000 male probands aged 45 to 69 were investigated in a field trial according to random distribution for undetected intestinal bleeding with the Haemoccult - method. With a participation of 28% only 39 out of a total of 65 positive cases could be evaluated. Four cases of colon or rectal carcinoma and four cases of colonic polyps were ascertained. In view of complete lack of experience with false negative test results the Haemoccult test is at present a useful addition to the diagnostic possibilities. However, in suspected cases even a repeatedly negative test cannot replace complete colo-rectal investigation.

Aged↗
PubMed1976

[The reliability of myocardial scintigraphy with thallium201, A comparison with lacvocardiography and perfusion scintigraphy (author's transl)].

Eighteen patients were investigated by laevocardiography, perfusion scintigraphy and with a 201thallium scan. In four patients with normal contractility of the left ventricle, normal uptake of 202thalium was found in every patient. Hypokinesia of the anterior wall or apex of the ventricle showed normal uptake on the 201thallium scintigram in four out of five patients. It follows that it is not usually possible to diagnose hypokinetic mural portions on 201thallium scintigrams without quantitative analysis. Our experience up to date with areas of akinesia has shown that it is possible to demonstrate areas of scarring (as negative contrast) in seven out of nine cases.

Angiocardiography↗