Biofeedback therapy on enteric modulation in patients with chronic constipation

Objective To explore the prospect and mechanism of biofeedback therapy.Methods Biofeedback therapy was conducted using SYS Orin PC-12 and U-Control TMEMG Home Trainer systems(Medtronic Synectics Co.Ltd.).Patients were trained as on how to identify normal or abnormal electrical signals and defecate properly.A self-contrast study was performed on the variation in symptoms,anal canal resting pressure,maximal contracting pressure,rectal volume-sensing threshold and anorectal inhibitory reflex.Results Increased mean anal canal resting pressure as well as reduced maximal contracting pressure,rectal volume-sensing threshold and anorectal inhibitory reflex were recorded in patients with chronic slow-transmission constipation treated by biofeedback system.Also the detection were shortened dilation phase and prolonged contracting period as revealed by vector analysis of anal canal.Conclusion Biofeedback system can markedly ameliorate difficulty in defecation,reduce solidity of feces,improve the desire to defecate and guide patients defecate properly,thus offering proofs for the clinical application in the treatment of constipation.