Difference between revisions of "Pelvimetry"
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| − | Low-dose 3D CT can be used for estimating pelvimetry parameters | + | ==Planning== |
| + | ;Indication | ||
| + | A review in 2003 considered routine performance of pelvimetry to be a waste of time, a potential liability, and an unnecessary discomfort.<ref name="Blackadar2004">{{cite journal | vauthors = Blackadar CS, Viera AJ | title = A retrospective review of performance and utility of routine clinical pelvimetry | journal = Family Medicine | volume = 36 | issue = 7 | pages = 505–7 | date = 2004 | pmid = 15243832 }}</ref> A woman's pelvis loosens up before birth by hormones, so an investigation before labor do not represent the physiologic capacity of the birth canal. Still, pelvimetry can be indicated when a woman has had failure to progress in a previous pregnancy. | ||
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| + | ;Choice of investigation | ||
| + | Low-dose 3D CT can be used for estimating pelvimetry parameters.<ref name=Cetin2016>{{cite journal | vauthors = Salk I, Cetin A, Salk S, Cetin M | title = Pelvimetry by Three-Dimensional Computed Tomography in Non-Pregnant Multiparous Women Who Delivered Vaginally | journal = Polish Journal of Radiology | volume = 81 | issue = | pages = 219–27 | date = 2016 | pmid = 27231494 | pmc = 4865272 | doi = 10.12659/PJR.896380 }}</ref> | ||
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| + | ==Interpretation== | ||
{|class="wikitable" | {|class="wikitable" | ||
!colspan=2| Parameter !! Image<br>([[maximum intensity projection]]) !! Definition !! Normal measures | !colspan=2| Parameter !! Image<br>([[maximum intensity projection]]) !! Definition !! Normal measures | ||
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| 9.5 to 11.5 cm.<ref name="pmid21509231">{{cite journal | vauthors = Gowri V, Jain R, Rizvi S | title = Magnetic resonance pelvimetry for trial of labour after a previous caesarean section | journal = Sultan Qaboos University Medical Journal | volume = 10 | issue = 2 | pages = 210–4 | date = August 2010 | pmid = 21509231 | pmc = 3074700 }}</ref> | | 9.5 to 11.5 cm.<ref name="pmid21509231">{{cite journal | vauthors = Gowri V, Jain R, Rizvi S | title = Magnetic resonance pelvimetry for trial of labour after a previous caesarean section | journal = Sultan Qaboos University Medical Journal | volume = 10 | issue = 2 | pages = 210–4 | date = August 2010 | pmid = 21509231 | pmc = 3074700 }}</ref> | ||
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| − | ! rowspan=2| | + | ! rowspan=2| Pelvic outlet |
! Sagittal pelvic outlet diameter¨ | ! Sagittal pelvic outlet diameter¨ | ||
| [[File:Low-dose_CT_of_sagittal_pelvic_outlet_diameter.jpg|120px]] | | [[File:Low-dose_CT_of_sagittal_pelvic_outlet_diameter.jpg|120px]] | ||
Revision as of 18:11, 2 July 2018
Author:
Mikael Häggström [notes 1]
Planning
- Indication
A review in 2003 considered routine performance of pelvimetry to be a waste of time, a potential liability, and an unnecessary discomfort.[1] A woman's pelvis loosens up before birth by hormones, so an investigation before labor do not represent the physiologic capacity of the birth canal. Still, pelvimetry can be indicated when a woman has had failure to progress in a previous pregnancy.
- Choice of investigation
Low-dose 3D CT can be used for estimating pelvimetry parameters.[2]
Interpretation
| Parameter | Image (maximum intensity projection) |
Definition | Normal measures | |
|---|---|---|---|---|
| Pelvic inlet | Transverse diameter of the pelvic inlet | 170px | 13 to 14.5 cm.[2] | |
| Obstetric conjugate | 120px Median plane |
The line between the narrowest bony points formed by the sacral promontory and the inner pubic arch | 10 to 12 cm.[2] | |
| Interspinous distance | 170px | The line between the narrowest bone points connects the ischial spines | 9.5 to 11.5 cm.[3] | |
| Pelvic outlet | Sagittal pelvic outlet diameter¨ | 120px | 9.5 to 11.5 cm.[3] | |
| Intertuberous diameter | 150px | 10 to 12 cm.[3] | ||
References
- ↑ "A retrospective review of performance and utility of routine clinical pelvimetry ". Family Medicine 36 (7): 505–7. 2004. PMID 15243832.
- ↑ 2.0 2.1 2.2 "Pelvimetry by Three-Dimensional Computed Tomography in Non-Pregnant Multiparous Women Who Delivered Vaginally ". Polish Journal of Radiology 81: 219–27. 2016. doi:. PMID 27231494.
- ↑ 3.0 3.1 3.2 "Magnetic resonance pelvimetry for trial of labour after a previous caesarean section ". Sultan Qaboos University Medical Journal 10 (2): 210–4. August 2010. PMID 21509231.
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