Vaginal electrohysterography: the design and preliminary evaluation of a novel device for uterine contraction monitoring in an ovine model

Nate Sunwoo, Karin Hwang, Karin J. Blakemore, Abimbola Aina-Mumuney

Research output: Research - peer-reviewArticle

Abstract

Objective: Tocodynamometry is the most common method of labor evaluation but most clinicians would agree it has limited utility before 26 weeks of gestation. The obesity epidemic has further reduced our ability to accurately detect uterine contractions using the tocodynamometer at any gestational age. We sought to design and test a novel contraction monitor that bypasses the maternal abdomen. Methods: An optimized version of an intravaginal electrohysterographic ring device was tested in an ovine model. The device and its methodology as well as the tocodynamometer were validated against the current gold standard uterine activity monitor, the intrauterine pressure catheter in six sheep at varying gestational ages. Results: Both the intravaginal ring device and the tocodynamometer correlated well with IUPC, r = 0.69 and 0.73, respectively (p 

LanguageEnglish (US)
Pages1-6
Number of pages6
JournalJournal of Maternal-Fetal and Neonatal Medicine
DOIs
StateAccepted/In press - Nov 13 2015

Fingerprint

Uterine Monitoring
Uterine Contraction
Sheep
Equipment and Supplies
Gestational Age
Abdomen
Catheters
Obesity
Mothers
Pressure
Pregnancy

Keywords

  • Contraction monitoring
  • electrohysterograph
  • preterm labor
  • tocodynamometry
  • uterine contraction

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Obstetrics and Gynecology

Cite this

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abstract = "Objective: Tocodynamometry is the most common method of labor evaluation but most clinicians would agree it has limited utility before 26 weeks of gestation. The obesity epidemic has further reduced our ability to accurately detect uterine contractions using the tocodynamometer at any gestational age. We sought to design and test a novel contraction monitor that bypasses the maternal abdomen. Methods: An optimized version of an intravaginal electrohysterographic ring device was tested in an ovine model. The device and its methodology as well as the tocodynamometer were validated against the current gold standard uterine activity monitor, the intrauterine pressure catheter in six sheep at varying gestational ages. Results: Both the intravaginal ring device and the tocodynamometer correlated well with IUPC, r = 0.69 and 0.73, respectively (p ",
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