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Results for “Pelvimetry”

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At least 235 records · Page 13Linked to original sources
PubMed1976

Ultrasonic pelvimetry. A method for preliminary estimation of the pelvic outlet.

Vaginal sound, with transmitter crystals of 2 MHz, is used when measuring the interspinous diameter. The echo from pelvic wall, the effect on the measured spinal diameter by altering the position of the ultrasonic transmitter, and the influence of air or faeces between the ultrasound transmitter and the pelvic wall, have been analysed in a series of model trials on a dummy submerged in water. Thereafter clinical trials were performed on 102 women, pregnant in their 9th month. The results obtained when measuring the interspinous diameter on the ultrasonic tomogram were compared with the results obtained when measuring the same distance on a frontal x-ray picture taken using the orthographic technique according to Borell-Frenström. The method is suitable for selecting those cases with suspect constriction of the pelvic outlet for an x-ray examination by the Borell-Fernström technique.

Female↗
PubMed2000

Analysis of McRoberts' maneuver by x-ray pelvimetry.

OBJECTIVE: To document radiographically the changes in pelvic dimensions created by McRoberts' maneuver. METHODS: Women at least 37 weeks' pregnant who presented to labor and delivery were eligible for study entry. Anterior-posterior and lateral x-rays were taken with women in the dorsal lithotomy position and after application of McRoberts' maneuver, in which the maternal legs were hyperflexed 45 degrees onto the maternal abdomen. A two-tailed paired t test was used to assess the changes in the pelvic diameters, with P < .05 considered statistically significant. RESULTS: Thirty-six subjects were enrolled in the study and 34 x-rays were suitable for analysis. McRoberts' maneuver was associated with an increase in the mean angle of inclination between the symphysis pubis and the sacral promontory (51.53 +/- 2.03 versus 38.07 +/- 1.96 degrees, P < .001). There was a 24% decrease in the angle created by drawing a line bisecting the symphysis pubis relative to the horizontal (P < .001). With McRoberts' maneuver the angle created by a line bisecting the longitudinal axis of the fifth lumbar vertebra and the longitudinal axis of the upper sacrum also increased (133.75 +/- 2.25 to 140.14 +/- 2.12 degrees, P = .04). CONCLUSION: Ours are the first systematic observations of pelvic changes associated with McRoberts' maneuver, confirming the traditional thinking that the maneuver causes a significant cephalad rotation of the symphysis pubis and subsequent flattening of the sacrum.

Adult↗
PubMed1989

[Pelvimetry with magnetic resonance tomography].

Magnetic resonance imaging (MRI) in the mediosagittal and transverse planes was used to measure the antero-posterior and transverse diameters of the minor pelvic cavity. The measurements for the diameters were larger than those usually found in the literature. The antero-posterior pelvic inlet diameter, the most important measurement for obstetrics, was on average 11.9 cm in contrast to the generally accepted length of 11.0 cm.

Adolescent↗