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Am J Obstet Gynecol. 2002 Jul;187(1):145-51.

First magnetomyographic recordings of uterine activity with spatial-temporal information with a 151-channel sensor array.

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1
Graduate Institute of Technology, University of Arkansas for Medical Sciences, Little Rock, 72205, USA.

Abstract

OBJECTIVE:

The purpose of this study was to examine the feasibility of recording the spatial-temporal magnetomyographic activity from the pregnant uterus with the use of the newly developed 151-channel noninvasive device, known as the superconducting quantum interference device array for reproductive assessment.

STUDY DESIGN:

Uterine magnetomyographic signals were recorded from 10 pregnant subjects with the 151-channel sensor array curved to fit the pregnant abdomen. The recording sessions were 16 minutes in length, with a sampling rate of 250 Hz.

RESULTS:

Uterine activity bursts were successfully recorded with the superconducting quantum interference device array for reproductive assessment system. By obtaining a contour plot of the magnetic field distribution, we were able to localize the areas of activation over the uterus during a contraction. Also, it was possible to calculate the time delay in the propagation of the activity across the uterus.

CONCLUSION:

Using superconducting quantum interference device array for reproductive assessment system, we have established the feasibility of recording uterine contractile activity with spatial-temporal resolution that is high enough to determine the regions of localized activation and propagation over the uterus.

PMID:
12114902
[Indexed for MEDLINE]
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