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Gastric aspiration in localization of gastrointestinal hemorrhage
Insights
Gastric aspiration accurately identifies upper gastrointestinal (GI) bleeding sources. A negative aspirate suggests a lower GI source, but rare upper GI bleeds can be missed.
Area of Science:
- Gastroenterology
- Diagnostic Medicine
Background:
- Accurate localization of gastrointestinal (GI) hemorrhage is crucial for effective patient management.
- Gastric aspiration is a rapid bedside test used to detect upper GI bleeding.
Observation:
- This study retrospectively and prospectively analyzed 1,190 patients over six years.
- Gastric aspirates were compared with definitive bleeding site identification via endoscopy or angiography.
Findings:
- A positive gastric aspirate for blood correctly identified an upper GI source in 93% of patients.
- A negative aspirate was associated with a lower GI source in 60% of cases.
- Three patients with upper GI bleeding (duodenal ulcers) had negative aspirates, highlighting a limitation.
Implications:
- Gastric aspiration is a valuable tool for diagnosing upper GI bleeding, especially when positive.
- Negative aspirates warrant further investigation for lower GI sources.
- Clinicians should consider upper GI sources even with negative aspirates in specific clinical contexts.
Abstract:
We compared the findings from gastric aspiration for blood with the site of gastrointestinal (GI) hemorrhage ultimately identified by endoscopy or angiography in 1,190 patients whose cases were analyzed retrospectively and prospectively during a six-year period. Gastric aspirates were positive for blood in 837 patients. An upper GI site proximal to Treitz' ligament was identified in 93%, and none had a lower GI site. A negative aspirate was found in 353 patients; a lower GI site was identified in 60%, and 1% (three patients) had an upper GI site. In these three patients, hemorrhage occurred in clinical settings suggesting ulcer disease, and bleeding duodenal ulcers were found in all three. All of the other 180 patients with a bleeding duodenal ulcer had a positive gastric aspirate.