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Biomedical subjects

R M Löfstedt

Publications and source records attributed to R M Löfstedt.

3 recordsLinked to original sources
PubMed1992

Prolonged proestrus in a bitch with X chromosomal monosomy (77,XO).

A stunted Miniature American Eskimo bitch that had signs of proestrus, which persisted for almost 8 months, had a 77,XO karyotype. Despite signs of proestrus, the ovaries were small and fibrous, and there was no evidence of ovarian follicle development or corpora lutea. Except for its juvenile appearance, the rest of the reproductive tract was grossly normal. Clinical signs in this bitch were similar to those in human beings with Turner's syndrome.

Animals↗
PubMedDate not supplied

Measuring sphere-like structures using transrectal ultrasonography.

Sphere-like structures are commonly measured for clinical or research purposes. We measured two diameters, the circumference (perimeter) and cross sectional area of 113 equine ovarian follicles in a water bath then determined the relationships between those measurements and the actual volume of fluid in the follicles. Cross-sectional area, diameter3 and area2/3 were all highly correlated with the volume of the structures and superior (p < 0.05) to diameter or perimeter as predictors of volume. As predictors of volume, there was no significant difference (p > 0.05) between cross-sectional area, diameter3, and area2/3. Because of the ease of measuring diameter, we suggest that diameter3 be used to estimate the actual size of sphere-like structures by ultrasonographic measurement. A table was generated for clinical use to show how much the largest diameter of a fluid-filled structure (follicle, cyst, hematoma, etc.) would have to increase or decrease to indicate a significant change in the volume of the structure.

Analysis of Variance↗