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2007 Program and Abstracts | 2007 Posters
Laparoscopic Adjustable Gastric Banding Does Not Cause Esophageal Dysmotility
Maria V. Gorodner, Carlos a. Galvani*, Alberto Gallo, Racquel Bueno, Santiago Horgan
Univ of Illinois at Chicago, Chicago, IL

Background: Esophageal dilatation and dysmotility have been proposed as a potential complication of laparoscopic gastric banding (LAGB). The effect of the operation on the esophageal motility remains still uncertain.
HYPOTHESIS: We hypothesized that: a) esophageal dysmotility after LAGB does not occur; b) esophageal manometry (EM) and barium esophagogram (BE) are both required pre and postoperatively; and c) fluoroscopic guidance is mandatory during band adjustment.
Methods: Between 1/01 and 10/06, 829 patients underwent LAGB at our institution. Preoperatively EM and BE were performed routinely in every patient. EM was considered normal when, lower esophageal sphincter pressure (LESP) was 14-24 mmHg, peristalsis was found during 10 wet swallows and mean distal esophageal amplitude (DEA) was 100±40 mmHg. Non specific esophageal motility disorder (NSEMD) was defined by the presence of DEA <40 mmHg. Hypertensive peristalsis (HP) was considered when DEA was > 160 mmHg. Ineffective esophageal motility (IEM) when DEA < 30 mmHg. Forty patients underwent repeat esophageal manometry at 1 year. BE was consistently performed at the time of the band adjustment.
Results: 829 pts underwent EM before LAGB: LESP was 16±7 mmHg; 56% had normal peristalsis, 37% NSEMD, 4% HP and 3% IEM; DEA was 83±38 mmHg. Of the 40 pts who had EM at 1 year, 85% were women, age 41±42 years, preoperative BMI was 47±47 kg/m2. At 17±14 months the % excess body weight loss (% EBWL) was 40±39. Postoperatively, 4 pts (18%) showed esophageal dilatation on the esophagogram. The results of the manometry are shown in the table.
Conclusions: Our study suggested that, a) LAGB does not adversely affect esophageal motility; b) esophageal manometry is required to rule out esophageal motility disorders after LAGB; and c) in spite of using fluoroscopic guidance during band adjustments, esophageal dilatation still can occur.

Preoperative (40 pts) Postoperative (40 pts) p value
LESP (mmHg) 15±13 18±16 NS
Esophageal Body
Normal peristalsis 60% 70% NS
NSEMD 26% 30%
HP 14% -
IEM - -
DEA (mmHg) 88±71 65±64 NS

2007 Program and Abstracts | 2007 Posters
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