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Biomedical subjects

D L Weaver

Publications and source records attributed to D L Weaver.

58 records · Page 4Linked to original sources

Diffusion-controlled mean reaction times in biological systems with elliptical symmetry.

The mean reaction (encounter or absorption) time is calculated in terms of the system size and reaction probability parameters for three-dimensional systems with diffusion-controlled dynamics and in which there is spherical, prolate spheroidal or oblate spheroidal geometry. Analytical and numerical comparisons are made among the three geometries. For completeness, similar results are derived for a two-dimensional elliptically symmetrical system, and the probability of non-absorption (or reaction) is found for a semi-infinite three-dimensional space with prolate or oblate spheroidal symmetry.

Journal Article↗

Percutaneous antecubital transvenous cholangiography. A modified technique using a flexible needle.

A percutaneous antecubital transvenous cholangiography technique using a flexible 20 gauge needle is described. The porcedure was successful in 6 patients with obstructive jaundice but failed in 2 patients without bile duct dilatation. The authors feel that this technique is easier and safer than present transvenous methods. Modifications for the femoral approach and use of the technique in pediatric patients are described.

Child↗