High complex anal fistula managed by the modified transanal opening of the intersphincteric space via the inter-sphincteric approach: A case report

Table 1 Anal sphincter pressure measurements by water-perfused anorectal manometry

Measurements	Values	References (in adults)
Anal resting pressure (mmHg)	51	50-70
Anal squeeze pressure (mmHg)	143	120-170
Functional anal canal length (cm)	3.2	3.2-3.5
Delayed defecation reflex	Reversible and pressure curve decline	Reversible and pressure curve decline
Rectoanal contraction reflex	+	+
Rectoanal inhibitory reflex	10 mL lead out	5-10 mL lead out
Anal reflex diastolic pressure (mmHg)	35	> 30
The first rectal sensation (mL)	20	10-30
Volume to get an urge to defecate (mL)	100	50-80
Maximal tolerated volume (mL)	170	110-280
Rectoanal pressure during defecation (mmHg)	83	> 45