Magnetomyographic Recordings of Pelvic Floor Activity During Pregnancy and Postpartum: A Novel Non-invasive Approach.
Magnetomyographic Recordings of Pelvic Floor Activity During Pregnancy and Postpartum: A Novel Non-invasive Approach.
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DOI：
10.1109/embc.2019.8857009
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发表时间：
2019-07
期刊：
影响因子：
--
通讯作者：
Eswaran H
中科院分区：
文献类型：
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作者：
Escalona-Vargas D;Oliphant S;Eswaran H
提肛肌（LAM）是骨盆底支撑不可或缺的，该肌肉复合体的损伤与骨盆底疾病有关，但我们评估其神经肌肉完整性的能力有限。在怀孕期间，孕妇经历全身功能和解剖学的修改，包括骨盆底肌肉适应。肌磁图（MMG）是一种新型的无创性工具，可以被动测量肌肉去极化活动产生的磁场，并提供了一种独特的方法来评估LAM。我们收集了一名单胎妊娠孕妇的连续MMG数据。孕妇进行LAM收缩（凯格尔），中间有休息期。Kegel信号通过使用频率相关减法（SUBTR）和独立分量分析（伊卡）方法分离。通过在会阴、腹部和大腿上放置双极电极，使用同步体表肌电图（EMG）评价副肌募集。在中等强度MMG Kegel时期计算振幅和频谱相关指标：三个频带的均方根（RMS）振幅、功率谱密度（PSD）和相对PSD（rPSD）。指标提取两个怀孕记录和产后。参数以妊娠周和产后周表示。我们观察到产后RMS Kegel振幅值低于妊娠期。在怀孕和产后之间观察光谱指标的变化。
The levator ani muscles (LAM) are integral to pelvic floor support and injury to this muscle complex has been associated with pelvic floor disorders, but our ability to evaluate their neuromuscular integrity is limited. During pregnancy, gravidas undergo systemic functional and anatomic modifications, including pelvic floor muscular adaptations. Magnetomyography (MMG) is a novel and non-invasive tool to passively measure the magnetic fields generated by depolarization activity of muscles and offers a unique method to evaluate the LAM. We collected serial MMG data in a pregnant woman with singleton gestation. Pregnant woman performed LAM contractions (Kegels) with intervening rest periods. Kegel signals were isolated by using the frequency dependent subtraction (SUBTR) and independent component analysis (ICA) methods. Concurrent body-surface electromyography (EMG) was used to evaluate for accessory-muscle recruitment by placing bipolar electrodes on the perineum, abdomen, and thigh. Amplitude and spectral-related indicators were computed across moderate intensity MMG Kegel epochs: root-mean square (RMS) amplitude, power spectrum density (PSD) and relative PSD (rPSD) in three frequency bands. Indicators were extracted from two pregnancy recordings and one postpartum. Parameters were represented in terms of gestation and postpartum weeks. We observed that postpartum RMS Kegel amplitudes had lower values than seen in pregnancy. Changes in spectral indicators were observed between pregnancy and postpartum.