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Biomedical subjects

M Silvert

Publications and source records attributed to M Silvert.

9 recordsLinked to original sources

Recognition of bladder tumors by excretory urography.

Bladder tumors initially may be diagnosed by excretory urography in patients undergoing the examination because of specific symptoms or unrelated complaints. Among seven strategies tested by six experienced readers, the combination of early, full-bladder, and postvoiding anteroposterior radiographs was most successful in identifying bladder tumors in a series including 20 cases of biopsy-proved bladder tumor and 19 cases of cystoscopically normal bladders. The postvoiding radiograph, when viewed alone, was the single most valuable projection, and resulted in the correct diagnosis of 14 cancers that were not appreciated on any other single radiograph for a given case. The addition of oblique projections to the other three views did not significantly increase diagnostic sensitivity.

Carcinoma, Transitional Cell↗

Calcium oxalate crystalluria.

Calcium oxalate crystals were obtained from urine specimens submitted to a hospital laboratory. The incidence of crystalluria was 4.2 per cent of 42 times the maximum reported incidence of urinary calculi. In our opinion the crystalluria was real and not artifactual. The crystalline structure was determined by polarized light, x-ray diffraction and electron microprobe analysis. Calcium oxalate occurs in several forms--the dihydrate as bipyramidal and dodecahedral prisms, the monohydrate as biconcave ovals, dumbbell shapes and intermediate forms.

Calcium↗

Statistical analysis and graphical representation the temporal and distributive properties of urodynamic data.

A collection of programs are described to analyze and display urodynamic data on a digital plotter. Utilizing a small programmable calculator, routines have been written to characterize the temporal and distributive properties of experimentally observed ureteral peristalses and associated urine output. The encoding pricipals used are designed to optimally use limited calculator memory.

Animals↗