Biomedical subjects

H W Pau

Publications and source records attributed to H W Pau.

75 records · Page 5Linked to original sources

PubMed1977

[Ultrasound diagnosis in simulated middle-ear-effusions in isolated human temporal bones (author's transl)].

By means of simulated middle-ear effusions in isolated human temporal bones it could be demonstrated, that ultrasonic echos of the drum show typical patterns if the middle-ear is filled with fluid or not. In normal air-filled drums there is only the echo of the tympanic membrane, whereas in fluid-filled drums a second echo from the bony medial wall of the tympanon appears. --A method is described how to perform ultrasonograms under visual observation of the tympanic membrane.

Ear Diseases↗

PubMedDate not supplied

Fluid kinetics of endolymph during rotation.

Rotatory vestibular excitability is discussed on the basis of a fluid-mechanical theory. The principle of this theory, already described for caloric excitation, is that appropriate stimulus causes flows within the endolymph. Experimental and mathematical approaches indicate these flows to be essentially the same in caloric as in rotatory stimulation. The direction of a horizontal nystagmus is apparently determined by a circuit of endolymph in the lateral part of the ampulla.

Endolymph↗

PubMedDate not supplied

Fluid kinetics of endolymph during calorization.

Various theories on the mechanism of caloric vestibular excitability are discussed and compared with our model, which involves two factors of endolymph movement: thermoconvection and fluid expansion. With this theory, caloric nystagmus in microgravity can be explained, as well as certain phenomena on earth, such as different vestibular responses depending on body position.

Endolymph↗