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Biomedical subjects

W Lotmar

Publications and source records attributed to W Lotmar.

At least 37 records · Page 2Linked to original sources
PubMed1976

Fundus photography in neonates, an approach to obtain indirect information on cerebral blood flow.

In view of the possibility to obtain indirect information on the interdependency between brain tissue metabolish and the diameter of the intraparenchymatous arterioles through measurement of systemic blood gases and blood pressure on one hand and the diameter of the central retinal artery on the other, we describe a modified method of fundus photography which is practical for neonatologists owing to the simplification brought about by the use of a special contact lens. In an appendix the relevant optical data are analyzed. Fundus photographs of neonates suffering from cardiac malformation or asphyxia are shown.

Cerebrovascular Circulation↗
PubMed1975

Fundus drawings versus photography.

Under adverse optical conditions (turbidity of the media) a well-trained observer/artist, using slit-lamp stereomicroscopy, is able to display in a drawing considerably more correct information about a fundus than what a fundus camera records. To a lesser degree this holds under favorable conditions too. General advocation of photography for being more objective is questioned; even if true, meme objectivity, i.e. no false information, would not make up for loss of important details. This paper intends to prove these points experimentally on an object (a nummulite shell) unfamiliar to the artist charged to do the drawing. The latter and photographs taken under varying conditions were compared inter se and with a high resolution scanning electron micrograph.

Art↗