Evaluation of the antireflux mechanism following laparoscopic fundoplication.
BACKGROUND
Laparoscopic Nissen fundoplication is an effective procedure for the treatment of gastro-oesophageal reflux disease (GORD), but the underlying motility mechanisms that explain the success of this operation remain unclear.


METHODS
Twenty patients with a history of GORD underwent stationary oesophageal manometry and prolonged ambulatory pH monitoring, both before and 3 months after fundoplication.


RESULTS
Eighteen patients were completely cured of reflux symptoms and stopped all antireflux medication after operation. After fundoplication there was a significant increase (P < 0.01) in median resting lower oesophageal sphincter (LOS) pressure and length. Median residual LOS pressure during swallow-induced LOS relaxation also increased significantly after operation (P < 0.01). The number of reflux episodes decreased from a median of 48 to 3 after fundoplication (P < 0.01). The time at pH less than 4 decreased from 5.7 to 0 per cent in the supine position (P < 0.01), and from 9.8 to 0.2 per cent while upright (P < 0.001).


CONCLUSIONS
Early subjective results at 3 months following laparoscopic antireflux surgery show improved symptoms. One of the mechanisms underlying the antireflux action of fundoplication is an increase in median residual LOS pressure at the gastro-oesophageal junction. This may be a purely mechanical effect of the fundic wrap extrinsic to the LOS.
Pursnani
K G
KG
Department of Medicine, Graduate Hospital, Philadelphia, Pennsylvania, USA.
Sataloff
D M
DM
Zayas
F
F
Castell
D O
DO
D000328:Adult; D000368:Aged; D005260:Female; D018662:Fundoplication / Q000379:methods*; D005764:Gastroesophageal Reflux / Q000503:physiopathology / Q000601:surgery*; D005769:Gastrointestinal Motility / Q000502:physiology; D006801:Humans; D006863:Hydrogen-Ion Concentration; D010535:Laparoscopy; D008297:Male; D008365:Manometry; D008875:Middle Aged; D018670:Monitoring, Ambulatory; D011300:Preoperative Care; D011312:Pressure; D016896:Treatment Outcome