Abstract
Objective
To assess the association between superficial perineal muscle trauma and perineal pain and dyspareunia.
Materials and methods
Prospective cohort study of 405 women with a spontaneous vaginal birth comparing an intact perineum and first-degree perineal trauma group (n = 205) with a second-degree perineal trauma and episiotomy group (n = 200). Perineal pain was measured at 2 days, 10 days, 7 weeks, 3 months and 6 months postpartum. Dyspareunia was assessed at 7 weeks, 3 months and 6 months postpartum.
Results
All second-degree perineal traumas and episiotomies involved damage to the bulbospongiosus muscle (BSM), but not always to the superficial transverse perineal muscle (STPM). In case of second-degree trauma or episiotomy, the odds of pain at 10 days and dyspareunia at 6 months postpartum were four- and five-fold greater, respectively, than if the perineum had remained intact or suffered a first-degree perineal trauma [OR 4.4 (95% CI: 2.8–6.9) and OR 5.5 (95% CI: 2.8–10.9), respectively]. When comparing injuries where > 50% BSM ± STPM against those with < 50% BSM torn, pain was significantly higher at 10 days postpartum [OR 1.9 (95% CI: 1.1–3.6], with no difference at 7 weeks, while dyspareunia was significantly higher at 6 months postpartum [OR 3.3 (95% CI: 1.4–7.8)]. There was no difference in perineal pain or dyspareunia when comparing first-degree with < 50% BSM traumas.
Conclusion
When perineal muscle trauma encompasses > 50% BSM ± STPM, perineal pain and dyspareunia persisted until 10 days and 6 months postpartum, respectively.
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Abbreviations
- BSM:
-
Bulbospongiosus muscle
- EPDS:
-
Edinburgh Postnatal Depression Scale
- LAM:
-
Levator ani muscle
- NRS:
-
Numerical rating scale
- OASI:
-
Obstetric anal sphincter injury
- REEDA:
-
Redness, Edema, Ecchymosis, Discharge and Approximation
- STPM:
-
Superficial transverse perineal muscle
- SVB:
-
Spontaneous vaginal birth
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Acknowledgments
The authors thank the women who participated in the study and the midwives and doctors at Hospital General de Granollers whose contributions made our research possible, especially Ms. A Rodriguez-Biosca, Dr. M Girvent, Dr. M Perez-de-Puig and Ms. P Castro.
Funding
This study was supported by the Department of Health, Government of Catalonia, no. SLT006/17/117, and by the Faculty of Medicine and Health Sciences, Nursing School, Universitat de Barcelona, no. PREI016-I.
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M Manresa: Project development, Conduct of trial, Data collection, Manuscript writing/editing.
A Pereda: Data collection/management, Manuscript writing/editing.
J Goberna-Tricas: Manuscript writing/editing.
SS Webb: Manuscript writing and editing.
C Terre-Rull: Project development, Data analysis, Manuscript writing/editing.
E Bataller: Project development, Manuscript writing/editing.
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M Manresa: None.
A Pereda: None.
J Goberna-Tricas: None.
SS Webb: None.
C Terre-Rull: None.
E Bataller: Personal fees from Boston Scientific, personal fees from Lacer, personal fees from Astellas, outside the submitted work.
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Manresa, M., Pereda, A., Goberna-Tricas, J. et al. Postpartum perineal pain and dyspareunia related to each superficial perineal muscle injury: a cohort study. Int Urogynecol J 31, 2367–2375 (2020). https://doi.org/10.1007/s00192-020-04317-1
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DOI: https://doi.org/10.1007/s00192-020-04317-1