Comparative evaluation of the effect of sustained inflation and rapid inflation/deflation of the intrarectal balloon upon rectoanal inhibitory reflex parameters in asymptomatic subjects.
OBJECTIVE
The effects of rapid sustained inflation versus rapid inflation/deflation of the intrarectal balloon upon rectoanal inhibitory reflex (RAIR) parameters were evaluated in asymptomatic subjects.


METHODS
Forty asymptomatic adults were submitted to anorectal manometry with rapid or sustained inflation with 30 and 60 mL air. The average age was 27.4 years (range, 20-40). The subjects were divided into Group I (20 men) and Group II (20 women) for analysis. RAIR parameters were registered in order to compare the inflation patterns within each group, and Groups I and II were compared for each inflation pattern with regard to RAIR parameters.


RESULTS
Sustained inflation significantly increased IAS relaxation time and duration of the reflex in both groups, and IAS tone recovery time in Group I.


CONCLUSIONS
RAIR parameters are influenced by the choice of inflation pattern. Further studies are required to establish a standard intrarectal balloon inflation pattern.
Monteiro
F J R
FJ
Department of Surgery, Federal University of Ceara, Fortaleza, Ceara, Brazil. fregomonteiro@uol.com.br
Regadas
F S P
FS
Murad-Regadas
S M
SM
Rodrigues
L V
LV
Leal
V M
VM
D000328:Adult; D001003:Anal Canal / Q000502:physiology*; D002404:Catheterization / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008365:Manometry; D011312:Pressure; D011446:Prospective Studies; D012007:Rectum / Q000502:physiology*; D012016:Reference Values; D012018:Reflex / Q000502:physiology*