Anorectal physiology results

Case 1Case 2Normal range
Max resting anal canal pressure (cm water)601660–120
Max squeeze pressure (cm water)9042120–300
Rectal volume at first rectal sensation
(ml water)
1005030–50
Rectal volume at defaecatory desire
(ml water)
1056050–100
Max tolerated rectal volume (ml water)15590100–180
Pudendal nerve terminal motorR 1.8R 1.51.5–2.0
Latency (ms)L 1.8L not done
Single fibre EMG fibre density 1.5Not done< 1.98 (mean (3 SD))