| Abbreviations | Meaning |
 | UGIB | Upper Gastrointestinal Biopsy |
| SBR | Small Bowel Resection; Small Box Respirator; Spleen-to-body [weight] Ratio; Strict Bed Rest; Styrene-butadiene Rubber |
| BLEED | Bleeding (ongoing), Low Systolic Blood Pressure, Elevated Prothrombin Time, Erratic Mental Status, Disease (unstable Comorbid Disease) (mnemonic For Gastro-intestinal Hemorrhage) |
| GAS | Gastric Acid Secretion |
| INT | International; Intestinal |
| INT | Interference; Intermediate; Intermittent; Intern, Internship; Internal; Interval; Intestinal; Intima; P-iodonitrotetrazolium |
| BSN | Baccalaureate Of Science In Nursing; Bachelor Of Science In Nursing; Bowel Sounds Normal |
| INN | International Nonproprietary Names; Intestinal Noise |
| IVR | Intestinal Vascular Resistance |
| SIS | Small Intestinal Submucosa |
| INTES | Intestine |
| RDG | Retrograde Duodenogastroscopy |
| EG | Electrogram; Enteroglucagon; Eosinophilic Granuloma; Erb-Goldflam [syndrome]; Esophagogastrectomy; Esophagogastric; Ethylene Glycol; External Genitalia |
| DRG | Duodenal-gastric Reflux Gastropathy |
| GJ | Gap Junction; Gastric Juice; Gastrojejunostomy |
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