title: Measuring uterine depth with colpohydrosonography.
abstract: OBJECTIVE
  To evaluate the accuracy of colpohydrosonography for measuring uterine depth.
  
  
  METHODS
  Uterine depth was assessed in 64 women being evaluated for assisted reproductive technology treatment in a high-volume private practice. After noting the cavity depth by standard transvaginal ultrasonography, a small amount of saline (10-20 mL) was instilled into the vagina, and the uterine depth was remeasured. The results were compared to the depth measured by mechanical sounding performed during a different evaluation. The sonographic measurements of uterine cavity depth were correlated with mechanical sounding.
  
  
  RESULTS
  Colpohydrosonography correlated strongly with uterine depth as measured by mechanical sounding (r = .89), while standard vaginal ultrasound correlated less well with sounding (r = .66). There was < 5% difference between colpohydrosonography and mechanical sounding in 89% of patients, while 48% of standard vaginal ultrasounds varied from sounding by > 10%.
  
  
  CONCLUSIONS
  Colpohydrosonography is a simple procedure that more accurately measures uterine cavity depth than conventional transvaginal ultrasound alone. Improved precision of cavity depth measurement could have implications for improving embryo placement during assisted reproductive technology treatment.
authors.affiliation: Sher Institute for Reproductive Medicine, 3121 S Maryland Parkway, Las Vegas, NV 89109, USA.
authors.forename: Geoffrey
authors.initials: G
authors.lastname: Sher
authors.forename: Jeffrey D
authors.initials: JD
authors.lastname: Fisch
mesh_terms: D000328:Adult; D020681:Colposcopes; D005260:Female; D006801:Humans; D027724:Reproductive Techniques, Assisted; D012680:Sensitivity and Specificity; D012965:Sodium Chloride / Q000008:administration & dosage; D014463:Ultrasonography / Q000379:methods*; D014599:Uterus / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*
chemical_list: D012965:Sodium Chloride