PMID: 7941810Jan 1, 1994Paper

Dr. Wang's tube--study of a new technique for eliminating pathogens in sperm preparation for reproductive medicine

Zentralblatt für Gynäkologie
H H RiedelR Lütticken


A total of 30 ejaculates has been tested for ejaculate volume, spermatozoal concentration, motility, agglomeration, agglutination and contamination by microorganisms. After that the ejaculate has been washed twice and transferred in the Dr. Wangs Tube which was filled with medium before. After an incubation time of 90 minutes very quickly moving spermatozoan could be observed through the microscope in the upper part (C-D) of the Tube. After the Tube was cut by means of a special glasscutter the motility of the containing spermatozoans of part C-D has been determined again, followed by a second bacteriological examination of the so prepared ejaculate. The results of sperm preparation with the Dr. Wangs Tube regarding the sperm motility has been very good (85.7% of the sperm samples showed a motility rate of 90% or even more after treatment). The bacteriological examination has been satisfactory: in 77.7% of the cases all existing sperm bacterias has been eliminated by preparation in the Dr. Wangs Tube. Among other microorganisms Escherichia coli, Proteus mirabilis and Staphylococcus aureus which are considered to be pathologic could be isolated from five of the ejaculates and have been removed after treatment with the Dr. Wangs ...Continue Reading

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