Two diameter pocket method
Last revised by Jeremy Jones on 26 Sep 2021
Citation, DOI, disclosures and article data
Citation:
Radswiki T, Jones J, Bell D, et al. Two diameter pocket method. Reference article, Radiopaedia.org (Accessed on 19 Mar 2024) https://doi.org/10.53347/rID-14837
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rID:
14837
Article created:
30 Aug 2011,
The Radswiki ◉
Disclosures:
At the time the article was created The Radswiki had no recorded disclosures.
View The Radswiki's current disclosures
Last revised:
26 Sep 2021,
Jeremy Jones ◉
Disclosures:
At the time the article was last revised Jeremy Jones had no recorded disclosures.
View Jeremy Jones's current disclosures
Revisions:
7 times, by
6 contributors -
see full revision history and disclosures
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Synonyms:
- Two diameter pocket
- Two diameter pocket method for assessing amniotic fluid volume
- Two diameter pocket (TDP)
- Two diameter pocket method for assessing amniotic fluid volumes
- Two diameter pocket (TDP) method
The two diameter pocket (TDP) method is an alternative method of assessing amniotic fluid volumes on ultrasound. However, it is not thought to be a good predictor of adverse neonatal outcome 2.
Sonographic assessment
According to this method 1,2:
- TDP <15 cm2: indicative of oligohydramnios
- TDP 15-50 cm2: usually taken as normal
- TDP >50 cm2: indicative of polyhydramnios
References
- 1. Magann E, Sanderson M, Martin J, Chauhan S. The Amniotic Fluid Index, Single Deepest Pocket, and Two-Diameter Pocket in Normal Human Pregnancy. American Journal of Obstetrics and Gynecology. 2000;182(6):1581-8. doi:10.1067/mob.2000.107325 - Pubmed
- 2. Chauhan S, Magann E, Perry K, Morrison J. Intrapartum Amniotic Fluid Index and Two-Diameter Pocket Are Poor Predictors of Adverse Neonatal Outcome. J Perinatol. 1997;17(3):221-4. - Pubmed
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