Pelvimetry
Pelvimetry | |
---|---|
Purpose | measurement of female pelvis |
Pelvimetry is the measurement of the female
Indication
Theoretically, pelvimetry may identify
A
A review in 2003 came to the conclusion that pelvimetry does not change the management of pregnant women, and recommended that all women should be allowed a trial of labor regardless of pelvimetry results.[2] It considered routine performance of pelvimetry to be a waste of time, a potential liability, and an unnecessary discomfort.[2]
Components
The terms used in pelvimetry are commonly used in obstetrics. Clinical pelvimetry attempts to assess the pelvis by clinical examination. Pelvimetry can also be done by
Low-dose
Parameter | Maximum intensity projections[5] | Thin slices | End points | Normal measures | |
---|---|---|---|---|---|
Pelvic inlet | Transverse diameter of the pelvic inlet | Coronal plane |
The iliopectineal lines, at widest transverse distance. | 13 to 14.5 cm.[4] | |
Obstetric conjugate | Median plane, 20 mm thick |
Same, but may require minor side-to-side scrolling to visualize both end points. | The line between the closest bony points of the pubic bone next to the symphysis
|
10 to 12 cm.[4] | |
Interspinous distance | Axial plane
|
The line between the closest bone points of the ischial spines | 9.5 to 11.5 cm.[6] | ||
Pelvic outlet | Sagittal pelvic outlet diameter | Same, but may require minor side-to-side scrolling to visualize both end points. | The closest bony points of the sacrococcygeal joint.[8]
|
9.5 to 11.5 cm.[6] | |
Intertuberous diameter | Axial plane
|
The closest bony points of the ischial tuberosities | 10 to 12 cm.[6] |
History
Comparison between an android (left) and a gynecoid pelvis (right).
|
Traditional obstetrical services relied heavily on pelvimetry in the conduct of delivery in order to decide if natural or operative
Traditional obstetrics have characterized four types of pelvises:[citation needed]
- Gynecoid: Ideal shape, with round to slightly oval (obstetrical inlet slightly less transverse) inlet.
- Android: triangular inlet, and prominent ischial spines, more angulated pubic arch.
- Anthropoid: the widest transverse diameter is less than the anteroposterior (obstetrical) diameter.
- Platypelloid: Flat inlet with shortened obstetrical diameter.
See also
- Childbirth
- List of obstetric topics
- Pelvic Bone Width
- Human pelvis
- Pregnancy
- Pubic symphysis
- Sacroiliac joint
- Sacrum
References
- ^ "pelvimetry" at Dorland's Medical Dictionary
- ^ PMID 15243832.
- PMID 28358979.
- ^ PMID 27231494.
- PMID 27231494.
- ^ PMID 21509231.
- ISBN 9781437725162.)
{{cite book}}
: CS1 maint: multiple names: authors list (link - ISBN 9781119971542.
- PMID 20285601.