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. 2005 Jan 1;5(1):1–148.

Adverse Effects After Roux-en-Y Gastric Bypass. From ECRI (19).

Study (Year) Timing of Event Description Patients, % (n/N)
Smith (2004) Perioperative Mortality 0.1% (1/779)*
Any Mortality 0.1% (1/779)
Gastrojejunal perforation 1.2% (9/779)
Gastrojejunal stenosis 7.6% (59/779)
Ventral incisional hernia 5.8% (45/779)
Cholecystitis 1.3% (10/779)
Gastrointestinal hemorrhage 2.8% (22/779)
Abdominal wall hematoma 0.6% (5/779)
Wound infection 4.1% (32/779)
Deep vein thrombosis 0.5% (4/779)
Pulmonary embolus 0.5% (4/779)
Dehydration 6.4% (50/779)
Myocardial infarction 0.1% (1/779)
Small bowel obstruction 4.4% (34/779)
Voice change post-intubation 0.1% (1/779)
Gastrojejunal ulcer – no bleeding 0.3% (2/779)
Splenectomy 0.3% (2/779)
Appendicitis 0.5% (4/779)
Subphrenic abscess without perforation 0.3% (2/779)
Pneumonia 1.2% (9/779)
Jejunojejunostomy perforation 0.1% (1/779)
Superior mesenteric vein thrombosis 0.1% (1/779)
Guillain barre syndrome 0.1% (1/779)
Suicide 0.1% (1/779)
Gilbert’s disease 0.1% (1/779)
Nephrolithiasis 0.9% (7/779)
Pseudomembranous colitis 0.8% (6/779)
Decubitus ulcer 0.3% (2/79)
Pelvic inflammatory disease 0.1% (1/779)
Diverticulitis 0.1% (1/779)
Dehiscence/evisceration 0.1% (1/779)
Severe colonic inertia 0.1% (1/779)
Clinical dumping syndrome 0.1% (1/779)
Stroke cerebral aneurysm 0.1% (1/779)
Beriberi 0.1% (1/779)
Arrhythmia 0.4% (3/779)
Heparin induced thrombocytopenia 0.1% (1/779)
Any 32.2% (251/779)
Perugini (2003) Perioperative Conversion to open surgery 1.1% (2/188)
Any Gastrojejunal leak 1.6% (3/188)
Mortality 1.1% (2/188)
Stenosis at gastrojejunal anastomosis 14.4% (27/188)
Staple line hemorrhage 3.2% (6/188)
Bowel obstruction 3.2% (6/188)
Roux limb obstruction at jejunostomy 1.6% (3/188)
Nausea 1.1% (2/188)
Infected hematoma 1.1% (2/188)
Wound infection 0.5% (1/188)
Left upper quadrant pain, unspecified 0.5% (1/188)
Upper gastrointestinal hemorrhage 2.1% (4/188)
Gastric perforation 0.5% (1/188)
Incarcerated hernia 0.5% (1/188)
Gastric outlet obstruction/bezoar 0.5% (1/188)
Gastrogastric fistula 0.5% (1/188)
Bile leak 0.5% (1/188)
OR bleeding splenectomy 0.5% (1/188)
Wittgrove
(2000)
Perioperative Mortality 0% (0/500)
Any Stenosis 1.6% (8/500)
Hemorrhage requiring reoperation 0.8%(4/500)
Mortality 0% (0/500)
Major infection 0.8% (4/500)
Minor infection 4.8% (24/500)
Small bowel obstruction 0.6% (3/500)
Reoperation due to leak 2.2% (11/500)
Leak 2.2% (11/500)
Pyelonephritis 0.2% (1/500)
Respiratory 1.4% (7/500)
Stroke 0.2% (1/500)
Incisional hernia 0% (0/500)
Spaulding
(1997)
Late Marginal ulcer 9.3% (14/150)
Stomal stenosis 24% (36/150)
Smith (1996) Early Mortality 0.5% (1/205)
Late Major complications 6.8% (14/205)
Major hemorrhage 2.4% (5/205)
Major wound infection 1% (2/205)
Major gastrojejunostomy stenosis 0.5% (1/205)
Major anastomic leak 1.5% (3/205)
Major life threatening ketoacidosis 0.5% (1/205)
Mortality 0.5% (1/205)
Major nonfatal pulmonary embolism 1% (2/205)
Pories (1995) Perioperative Mortality 1.5% (9/608)
Early Reoperation 2.8% (17/608)
Anastomotic stenosis 3% (18/608)
Minor wound infection 8.7% (53/608)
Severe wound infection 3% (18/608)
Splenic tears 2.5% (15/608)
Minor wound seroma 5.8% (35/608)
Subphrenic abscess 2.5% (15/608)
Depression 23.4% (142/608)
Bile reflux 8.7% (53/608)
Gastritis 13.2% (80/608)
Incisional hernia 23.8% (145/608)
Cholethiasis 11.3% (69/608)
Nutritional deficiency Vit B12 40% (243/608)
Nutritional deficiency anemia 39% (237/608)
Staple line disruption 15.1% (92/608)
Hospital readmission 38.2% (232/608)
Dumping syndrome 70.6% (429/608)
Mortality 4.1% (25/608)
*

Combined laparoscopic and open groups.

Calculated by ECRI.