Quantitative evaluation of the anal sphincter by the tendency presented in the manometric asymmetry variations.
OBJECTIVE
To assess the tendency of manometric asymmetry, and to quantitatively evaluate the function of the anal sphincter.


METHODS
Using the PC polygram HR at the states of relax and squeeze, we compared the values of pressure asymmetry in the anorectum of 27 normal children with that of 12 children with fecal incontinence.


RESULTS
In the two states, the anal sphincter in normal children showed not only the gradient of pressure, but also a gradient of pressure asymmetry. Children with fecal incontinence did not show any gradients.


CONCLUSIONS
Gradients of pressure and pressure asymmetry can quantitatively evaluate the function of the anal sphincter.
Xiao
Yuanhong
Y
Department of Pediatrics Surgery, PLA General Hospital, Beijing 100853, China.
Liu
Guilin
G
D000293:Adolescent; D001003:Anal Canal / Q000502:physiology*; D002648:Child; D002675:Child, Preschool; D005242:Fecal Incontinence / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008365:Manometry; D012007:Rectum / Q000502:physiology