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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Distensibility and Strength of the Pelvic Floor Muscles of Women in the Third Trimester of Pregnancy

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Petricelli, Carla Dellabarba [1] ; Magalhaes Resende, Ana Paula [2] ; Elito Junior, Julio [1] ; Araujo Junior, Edward [1] ; Alexandre, Sandra Maria [1] ; Diniz Zanetti, Miriam Raquel [1] ; Nakamura, Mary Uchiyama [1]
Total Authors: 7
[1] Fed Univ Sao Paulo UNIFESP, Dept Obstet, BR-05303000 Vila Leopoldina, SP - Brazil
[2] Univ Fed Uberlandia, Fac Phys Educ & Physiotherapy, BR-38400 Uberlandia, MG - Brazil
Total Affiliations: 2
Document type: Journal article
Web of Science Citations: 6

Objective. The objective of this study was to compare the role of the pelvic floor muscles between nulliparous and multiparous women in the third trimester of pregnancy, by analyzing the relationship between electrical activity (surface electromyography-EMG), vaginal palpation (modified Oxford scale), and perineal distensibility (Epi-no). Methods. This was an observational cross-sectional study on a sample of 60 healthy pregnant women with no cervical dilation, single fetus, gestational age between 35 and 40 weeks, and maternal age ranging from 15 to 40 years. The methods used were bidigital palpation (modified Oxford scale, graded 05), surface EMG(electrical activity during maximal voluntary contraction), and perineal distensibility (Epi-no device). The Pearson correlation coefficient (r) was used to analyze the Epi-no values and the surface EMG findings. The Kruskal-Wallis test was used to compare the median values from surface EMG and Epi-no, using the modified Oxford scale scores. Results. Among the 60 patients included in this study, 30 were nulliparous and 30 multiparous. The average maternal age and gestational age were 26.06 (+/- 5.58) and 36.56 (+/- 1.23), respectively. It was observed that nulliparous women had both higher perineal muscle strength (2.53 +/- 0.57 versus 2.06 +/- 0.64;P = 0.005) and higher electrical activity (45.35 +/- 12.24.. V versus 35.79 +/- 11.66 mu V;P = 0.003), while among the multiparous women, distensibility was higher (19.39 +/- 1.92 versus 18.05 +/- 2.14;P = 0.013). We observed that there was no correlation between perineal distensibility and electrical activity during maximal voluntary contraction(r = -0.193;p - 0.140). However, we found a positive relationship between vaginal palpation and surface electromyography (P = 0.008), but none between Epi-no values (P = 0.785). Conclusion. The electrical activity and muscle strength of the pelvic floor muscles of the multiparous women were damaged, in relation to the nulliparous women, while the perineal distensibility was lower in the latter group. There was a positive relationship between surface EMG and the modified Oxford scale. (AU)

FAPESP's process: 11/18731-6 - Pelvic floor muscle function in the third trimester of pregnancy: extensibility and muscle strength
Grantee:Mary Uchiyama Nakamura
Support type: Regular Research Grants