Evaluation of Pelvic Floor Muscles in Pregnancy and Postpartum With Non-Invasive Magnetomyography.
Evaluation of Pelvic Floor Muscles in Pregnancy and Postpartum With Non-Invasive Magnetomyography.
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DOI：
10.1109/jtehm.2021.3130785
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发表时间：
2022
影响因子：
3.4
通讯作者：
Eswaran H
中科院分区：
文献类型：
--
作者：
Escalona-Vargas D;Siegel ER;Oliphant S;Eswaran H
目的：使用具有振幅和频谱参数的非侵入性新型肌磁图 (MMG) 技术记录和表征怀孕和产后提肛肌 (LAM) 活动的特征。方法：无并发症妊娠的未产妇在妊娠晚期和产后大约 2 个月 (PP) 的休息和自愿 LAM 收缩 (Kegels) 期间参与 MMG 数据收集，并调节强度。记录同步表面肌电图以记录辅助肌的募集情况。分析了中等强度凯格尔 (MK) MMG 试验。在 MK 历元上计算三个频段（低、中、高）的幅度和频谱参数，包括均方根 (RMS) 幅度、功率谱密度 (PSD) 和归一化 PSD (rPSD)。计算怀孕和产后之间的统计比较。结果：MMG 记录测量了 10 名孕妇。结果显示，在妊娠晚期和产后之间，RMS 和功率下降，并呈显着趋势。从妊娠晚期到产后，低频段的 rPSD 值显着下降（p = 0.028），而中频段则显着增加（p = 0.018）。结论：本研究表明，MMG 作为非侵入性工具，能够检测和表征怀孕期间和产后 LAM 活性的幅度和光谱参数变化。
Objective: To record and characterize features of levator ani muscles (LAM) activity in pregnancy and postpartum using non-invasive and novel Magnetomyography (MMG) technique with amplitude and spectral parameters. Methods: Nulliparous women with uncomplicated pregnancies participated in the MMG data collection during rest and voluntary LAM contractions (Kegels) with modulated intensity in third trimester and approximately 2 months postpartum (PP). Simultaneous surface electromyography was recorded to document the recruitment of accessory muscles. Moderate strength Kegel (MK) MMG trials were analyzed. Amplitude and spectral parameters including root-mean square (RMS) amplitude, power spectrum density (PSD) and normalized PSD (rPSD) in three frequency bands (low, middle, high) were computed on MK epochs. Statistical comparisons between pregnancy and postpartum were calculated. Results: MMG recordings were measured from 10 pregnant women. Results showed decreased RMS and power between third trimester and postpartum, trending towards significance. rPSD values in the low frequency band decreased significantly (p = 0.028) from third trimester to postpartum, while significant increase was observed in the middle frequency band (p = 0.018). Conclusions: This study shows that MMG as non-invasive tool has the ability to detect and characterize changes of LAM activity with amplitude and spectral parameters during pregnancy and postpartum.