Characterization of Pelvic Floor Activity in Healthy Subjects and with Chronic Pelvic Pain: Diagnostic Potential of Surface Electromyography

Autores de IIS La Fe

• Marta Tarazona Motes

  Autor

• Francisco Nohales Alfonso

  Autor

• Maria De Arriba Garcia

  Autor

• José Alberola Rubio

  Autor

Participantes ajenos a IIS La Fe

• Albaladejo-Belmonte, M
• Garcia-Casado, J

Grupos

• Medicina Reproductiva

  

  Investigador Principal

  José Morales Roselló

Abstract

Chronic pelvic pain (CPP) is a highly disabling disorder in women usually associated with hypertonic dysfunction of the pelvic floor musculature (PFM). The literature on the subject is not conclusive about the diagnostic potential of surface electromyography (sEMG), which could be due to poor signal characterization. In this study, we characterized the PFM activity of three groups of 24 subjects each: CPP patients with deep dyspareunia associated with a myofascial syndrome (CPP group), healthy women over 35 and/or parous (>35/P group, i.e., CPP counterparts) and under 35 and nulliparous (<35&NP). sEMG signals of the right and left PFM were recorded during contractions and relaxations. The signals were characterized by their root mean square (RMS), median frequency (MDF), Dimitrov index (DI), sample entropy (SampEn), and cross-correlation (CC). The PFM activity showed a higher power (>RMS), a predominance of low-frequency components (<MDF, >DI), greater complexity (>SampEn) and lower synchronization on the same side (<CC) in CPP patients, with more significant differences in the >35/P group. The same trend in differences was found between healthy women (35/P) associated with aging and parity. These results show that sEMG can reveal alterations in PFM electrophysiology and provide clinicians with objective information for CPP diagnosis.

Keywords

• chronic pelvic pain; myofascial pain syndrome; deep dyspareunia; pelvic floor musculature; surface electromyography; diagnosis