Assessment of residual gastric volume by ultrasound prior to upper endoscopy: a prospective cohort study
Authors' conclusion
Ultrasonography was an effective way to assess residual gastric content, which can help improve patient safety.
Study context
- Population
- Patients undergoing upper gastrointestinal endoscopy282 analysed
- Participants
- 294 patients
- Outcome
- Accuracy of gastric ultrasound in assessing residual gastric content (sensitivity and specificity)
Methodological detailsdiagnostic accuracy
- Diagnostic accuracy
Main finding
As reported in the abstract
Accuracy of ultrasonography to predict gastric content at risk of aspiration
| Group | Specificity | Sensitivity | PPV | NPV |
|---|---|---|---|---|
| Ultrasonography | 100% | 77% | 100% | 99% |
Ultrasonography
Specificity100%
Sensitivity77%
PPV100%
NPV99%
Observational data: associations, not effects.
Further findings
Factors more frequent among those with residual gastric content
| RR (95% CI) | P value | ||
|---|---|---|---|
| Prokinetic use | 7.5 (1.9–29.1) | P < 0.01 | |
| Previous stroke | 4.0 (1.2–13.6) | P = 0.02 | |
| Male sex | 3.3 (1.2–9.4) | P = 0.02 | |
| 0.050.21520Relative risk (log scale) |
Incidence of residual gastric contents
- Incidence of residual gastric contents
- 5%
Safety
- Aspiration events
- 0
Original publication
Assessment of residual gastric volume by ultrasound prior to upper endoscopy: a prospective cohort study. Can J Anaesth. Published 16 December 2024. doi:10.
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