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Biomedical subjects

Y Mahler

Publications and source records attributed to Y Mahler.

At least 55 records · Page 3Linked to original sources
PubMed1978

A new hazard in the use of an external demand pacemaker.

Ventricular pacing by a Medtronic model 5880A external demand pacemaker was shown to be inhibited as long as the metal coverplate of the pacemaker was touched with bare hands. The asystolic periods were induced by a previously undescribed malfunction of the pacemaker, inherent in its structure. This phenomenon occurred when both patient and physician were isolated from any main operated instrument. It could be demonstrated that pacer inhibition was induced by capacitive coupled 50 Hz fields from the environment, activating the sensing mechanism through the metal coverplate. The plastic covered Medtronic model 5840 pacemaker does not have such undesirable characteristics.

Electrocardiography↗
PubMed1977

Fetal movements recorder, use and indications.

A new device for recording fetal movements is presented. This device is composed of 2 sensors, incorporating a highly sensitive piezoelectric material. It is sensitive to rapid straining forces such as fetal movements and relatively insensitive to steady, slow movements such as uterine contractions and maternal respiratory movements. In this study of 20 women, the sensors were placed on 2 different zones of the abdomen, usually above the umbilicus. There was a good correlation between fetal movements recorded by the device and those felt by the patients. Seventy percent of all observed fetal movements recorded by the device were registered simultaneously by the women. The device recorded 90.4 percent and the women recorded 79.7 percent of all such movements.

Female↗