pelvic diameter

diameter /di·am·e·ter/ (di-am´ĕ-ter) the length of a straight line passing through the center of a circle and connecting opposite points on its circumference. Symbol d.

anteroposterior diameter the distance between two points located on the anterior and posterior aspects, respectively, of the structure being measured, such as the true conjugate diameter of the pelvis or occipitofrontal diameter of the skull.

Baudelocque's diameter external conjugate d.; see pelvic d.

conjugate diameter see pelvic d.

cranial diameters distances measured between certain landmarks of the skull, such as biparietal, that between the two parietal eminences; bitemporal, that between the two extremities of the coronal suture; cervicobregmatic, that between the center of the anterior fontanel and the junction of the neck with the floor of the mouth; frontomental, that between the forehead and chin; occipitofrontal, that between the external occipital protuberance and most prominent midpoint of the frontal bone; occipitomental, that between the external occipital protuberance and the most prominent midpoint of the chin; suboccipitobregmatic, that between the lowest posterior point of the occiput and the center of the anterior fontanel.

pelvic diameter any diameter of the pelvis, such as diagonal conjugate, joining the posterior surface of the pubis to the tip of the sacral promontory; external conjugate, joining the depression under the last lumbar spine to the upper margin of the pubis; true (internal) conjugate, the anteroposterior diameter of the pelvic inlet, measured from the upper margin of the pubic symphysis to the sacrovertebral angle; oblique, joining one sacroiliac articulation to the iliopubic eminence of the other side; transverse (of inlet), joining the two most widely separated points of the pelvic inlet; transverse (of outlet), joining the medial surfaces of the ischial tuberosities.

Diameters of pelvic inlet (see also pelvic planes ).

pelvic diameter

Etymology: L, pelvis, basin; Gk, diametros, measuring across

1 at the rim of the pelvis, a line from the lumbosacral angle to the symphysis pubis.

2 at the pelvic outlet, a line from the tip of the coccyx to the lower border of the symphysis pubis.

diameter [di-am´ĕ-ter]

the length of a straight line passing through the center of a circle and connecting opposite points on its circumference; hence the distance between the two specified opposite points on the periphery of a structure such as the cranium or pelvis.

cranial d's (craniometric d's) imaginary lines connecting points on opposite surfaces of the cranium; the most important are biparietal, that joining the parietal eminences; bitemporal, that joining the extremities of the coronal suture; cervicobregmatic, that joining the center of the anterior fontanel and the junction of the neck with the floor of the mouth; frontomental, that joining the forehead and chin; occipitofrontal, that joining the external occipital protuberance and the most prominent midpoint of the frontal bone; occipitomental, that joining the external occipital protuberance and the most prominent midpoint of the chin; suboccipitobregmatic, that joining the lowest posterior point of the occiput and the center of the anterior fontanel.

pelvic diameter see pelvic diameter.

pelvic [pel´vik]

pertaining to the pelvis.

pelvic diameter any diameter of the pelvis. The diagonal conjugate joins the posterior surface of the pubis to the tip of the sacral promontory; the external conjugate joins the depression under the last lumbar spine to the upper margin of the pubis; the true or internal conjugate is the anteroposterior diameter of the pelvic inlet, measured from the upper margin of the pubic symphysis to the sacrovertebral angle; the oblique joins one sacroiliac articulation to the iliopubic eminence of the other side; the transverse diameter of the inlet joins the two most widely separated points of the pelvic inlet; and the transverse diameter of the outlet joins the medial surfaces of the ischial tuberosities.

pelvic inflammatory disease any pelvic infection involving the upper female genital tract beyond the cervix; such diseases are a major cause of female infertility.

diameter

cranial d's, craniometric d's

imaginary lines connecting points on opposite surfaces of the cranium.

pelvic diameter

any of the diameters of the pelvis; any measurement that expresses the diameter of the birth canal in the female.

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android pelvis anteroposterior diameter anthropoid pelvis Baudelocque's diameter beaked pelvis brachypellic pelvis clinical pelvimetry conjugata conjugate conjugate diameter contracted pelvis cordate pelvis diameter dolichopellic pelvis false pelvis flat pelvis frozen pelvis gynecoid pelvis juvenile pelvis			Their radiological examination of pelvic diameters of women at least 37 weeks pregnant, studied the dorsal lithotomy position as well as during the McRoberts' manoeuvre (hyper flexion of the woman's legs onto her chest). Active breech birth: the point of least resistance by Banks, Maggie / New Zealand College of Midwives Journal On all fours Can increase the pelvic diameter, but also improves the angle of descent for the baby and allows better access for the midwife to manoeuvre the baby. Stand up for labour rights; Lying down while giving birth can make ... by The Mirror (London, England)			pellet pellicle Pelligrini-Steida disease pellucid pelo- Pelodera peloid pelopsia pelotherapy pelt peltation Peltophryne lemur pelves pelvi- pelvic pelvic abscess pelvic arch pelvic axis pelvic bones pelvic brim pelvic cavity pelvic cellulitis pelvic classification pelvic congestion syndrome pelvic declination pelvic diameter pelvic diaphragm pelvic direction Pelvic Exam pelvic examination pelvic exenteration pelvic fascia pelvic field Pelvic Flex pelvic floor pelvic floor electrical stimulation Pelvic Fracture pelvic ganglion pelvic girdle pelvic hematoma pelvic index pelvic inferior aperture pelvic inflammatory disease pelvic inlet pelvic kidney pelvic limb pelvic lipomatosis pelvic minilaparotomy pelvic muscle exercise Pelvic muscle exercises Pelvic organs			pelvic arch pelvic axis Pelvic bone Pelvic bone Pelvic bone Pelvic bone Pelvic bones Pelvic bones Pelvic bones Pelvic brim Pelvic brim Pelvic brim pelvic canal pelvic canal Pelvic cavities Pelvic cavities Pelvic cavities pelvic cavity pelvic cavity pelvic cavity pelvic cellulitis pelvic cellulitis pelvic cellulitis pelvic classification pelvic colon pelvic colon pelvic colon pelvic congestion syndrome Pelvic Contractions pelvic declination pelvic diameter pelvic diaphragm pelvic diaphragm pelvic diaphragm pelvic direction Pelvic Disease-Free Survival Pelvic exam Pelvic exam Pelvic examination Pelvic examination Pelvic examination Pelvic examination Pelvic exenteration Pelvic exenteration pelvic fascia Pelvic fasciae pelvic field pelvic fin pelvic fin pelvic fins pelvic fins Pelvic Flex pelvic flexure pelvic flexure pelvic flexure Pelvic floor Pelvic floor Pelvic floor Pelvic floor Pelvic Floor Clinical Studies Group Pelvic Floor Disorders Network