Clinical research of anorectal manometry in unrelaxed pelvic floor syndromeHUA Yang*，MA Xiukun，QIAO Li,et al.*Department of General Surgery,the Second Hospital of Tianjin Medical University,Tianjin 300211,China Corresponding author:HUA Yang,Email:superbuyeree@yahoo.com.cn AbstractObjectiveTo explore the changes of anorectal manometry in unrelaxed pelvic floor syndrome (UPFS).MethodsAnorectal pressure,rectal evacuation were measured in 57 UPFS patients (UPFS group) and 30 healthy volunteers (control group) between January 2006 and August 2007 at the People’s Hospital of Tianjin City.ResultsThe anal resting pressure in UPFS group had no significant difference with that in control group (P>005).The anal maximum contractive pressure in UPFS group was higher than that in control group (P<001).The rectal anal pressure difference when straining to defecate in UPFS group was negative and lower than that in control group (P<001).The minimum rectal volumes to first sensation and desire to defecate in UPFS group were higher than those in control group (P<001) .ConclusionThere are decreased rectal sensation and pelvic floor muscle dysfunction in patients with UPFS.