This study is a multi-center survey of surface electromyography (sEMG) of pelvic floor muscles in healthy female. The aim of the study is to get the reference interval of normal pelvic floor sEMG from Chinese women.
Pelvic floor dysfunction is a group of diseases caused by the damage of pelvic floor supporting structure. Pelvic floor muscles play an important role in the maintenance of pelvic floor function. Surface electromyography (sEMG) has been widely used to evaluate the function of pelvic floor muscles. The sEMG tests, which include pretest and posttest resting amplitude (µV), as well as phasic, tonic and endurance contractile amplitude (µV), are performed using Vishee neuro-muscle stimulator (MyoTrac Infiniti, model SA9800, Thought Technology Ltd., Montreal, Canada), following the Glazer protocols. A pear-shaped vaginal probe (serial number DYS180610, type VET-A, produced by Nanjing Vishee Medical Technology, Ltd.) is placed into the vagina when sEMG tests are performed. This is a cross-sectional survey. The reference intervals of pelvic floor sEMG in healthy female are evaluated.
Study Type
OBSERVATIONAL
Enrollment
1,000
Maternal and Child Health Hospital of Anhui Province
Hefei, Anhui, China
RECRUITINGPeking Union Medical College Hospital, Chinese Academy of Medical Science
Beijing, Beijing Municipality, China
RECRUITINGGansu Province Maternal and Child Care Hospital
resting amplitude (µV) pre baseline
pretest one minute rest
Time frame: 1 day
coefficients of variability pre baseline
standard deviation divided by amplitudes at pretest resting period
Time frame: 1 day
maximum rapid contraction amplitude (µV)
five rapid contractions (Flicks) with a 10 second rest before each one (phasic).
Time frame: 1 day
recovery time at termination of rapid contraction(second)
recovery time until all muscles relax
Time frame: 1 day
average amplitude of tonic contraction(µV)
five 10 second contractions with a 10 second rest before each one (tonic)
Time frame: 1 day
coefficients of variability for the tonic contraction
standard deviation divided by amplitudes at tonic contraction period
Time frame: 1 day
recovery time at termination of tonic contraction(second)
recovery time until all muscles relax
Time frame: 1 day
average amplitude of endurance contraction(µV)
A 10 second rest followed by a single endurance contraction of 60 seconds (endurance)
Time frame: 1 day
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Lanzhou, Gansu, China
Foshan Maternal and Child Health Care Hospital
Foshan, Guangdong, China
RECRUITINGthe First Affiliated Hospital of Nanjing Medical University
Nanjing, Jiangsu, China
RECRUITINGXi'an' Fourth Hospital
Xi’an, Shanxi, China
RECRUITINGNingbo Women & Children's Hospital
Ningbo, Zhejiang, China
RECRUITINGcoefficients of variability for the endurance contraction
standard deviation divided by amplitudes at endurance contraction period
Time frame: 1 day
resting amplitude (µV) post baseline
after-test one minute rest
Time frame: 1 day
coefficients of variability post baseline
standard deviation divided by amplitudes at after-test resting period
Time frame: 1 day