Biomedical subjects
Publications and source records attributed to H Henner.
43 patients under general anesthesia were monitored by continuous tissue pH measurement and intermittent micro-blood-samples. The values obtained for the capillary pH and tissue pH were correlated. A highly significant correlation was found between tissular pH and capillary pH. Different methods of general anesthesia apparently do not influence the continuous tissue pH measurement.
Using this tool the application of the pH electrode is nearly as easy as the attachment of a common ECG-scalp-electrode [3]. Visual control and lithotomy position is not necessary any more. The different tools are adapted to each other so that incision place and the tip of the pH electrode are automatically centered perpendicularly. The first results by using this tool promise to be successful. Time of application is short, the maintenance of the pH electrode is good and the application for the patient no longer disagreeable.
Tissue pH values of 70 fetuses have been measured continuously during labor using the micro-electrode designed by Stamm. Significant correlation between continuous tissue pH and corresponding micro blood values can be shown. However, the relationship between patterns of tissue pH and capillary pH values seems not to be very constant. Therefore, the reliability of individual tissue pH measurements is still questionable.
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On 975 pregnant women treated and delivered during 1973 at the Heidelberg University department of obstetrics 3780 ultrasound examinations were carried out. The frequency of breech presentation related to the duration of pregnancy and the likelyhood of breech presentation at term were calculated. Breech presentation can be seen as physiologic in 70% of early pregnancies. After the 33rd week it is below 10%, after the 38th week 4%. The probability of breech presentation at term at nay given stage before the 30th week is below 10%. After de 31st week this rises steeply up to a maximum of 66% after the 37th week. These influences of parity on these 2 data are described. The relationship between a low placenta and breech presentation is mentioned. These results are discussed.
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