Effect of Biofeedback Therapy in Constipation According to Rectal Sensation

• Published in: Gut and liver Vol. 7; no. 2; pp. 157 - 162
• Main Authors: Ji Yong Ahn, Seung Jae Myung, Kee Wook Jung, Dong Hoon Yang, Hyun Sook Koo, So Young Seo, In Ja Yoon, Kyung Jo Kim, Byong Duk Ye, Jeong Sik Byeon, Hwoon Yong Jung, Suk Kyun Yang, Jin Ho Kim
• Format: Journal Article
• Language: Korean
• Published: 대한간학회 30.03.2013
• Subjects: Anorectal manometry; Biofeedback; Constipation; Rectum; Sensation
• ISSN: 1976-2283

Background/Aims: The pathophysiologic mechanism of rectal hyposensitivity (RH) is not well documented, and the significance of RH in biofeedback therapy (BFT) has not been evaluated. Thus, we aimed to assess the effect of BFT in constipated patients according to the presence of RH. Methods: Five hundred and ninety constipated patients (238 males and 352 females) underwent anorectal physiologic assessments. Of these, anorectal manometry was performed before and after BFT in 244 patients (63 RH and 181 non-RH patients). Results: The success rate of BFT was 56% in the RH and 61% in the non-RH group (p=0.604). The measurements of resting pressure, squeezing pressure, desire to defecate volume, urge to defecate volume, and maximum volume were decreased after BFT in the RH group (p<0.05), whereas only resting and squeezing pressures were decreased in the non-RH group (p<0.05). Among the RH group, individuals who responded to BFT showed decreased resting pressure, squeezing pressure, desire to defecate, urge to defecate, and maximum volume and increased balloon expulsion rate; among those who did not respond to BFT, only desire to defecate volume was improved. Conclusions: In constipated patients with RH, changes of anorectal manometric findings differed in comparison to patients without RH. The responses to BFT showed both anorectal muscle relaxation and restoration of rectal sensation. (Gut Liver 2013;7:157-162)