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Updated: Aug 12, 2026

Quantitative Autonomic Testing
Published on: July 19, 2011
Blood pressure changes during barium enema
S C Roach1, O J Martin, A Owen
1Department of Radiology, South Manchester University Hospitals, NHS Trust, Manchester M20 2LR, U.K.
Blood pressure may drop significantly in patients over 60 during barium enema examinations when standing. This hypotension risk is higher for symptomatic individuals, suggesting modified procedures for at-risk patients.
Area of Science:
- Radiology
- Cardiovascular Physiology
Background:
- Barium enema examinations involve potential physiological stress.
- Blood pressure monitoring during radiological procedures is crucial for patient safety.
Purpose of the Study:
- To document blood pressure changes during barium enema examinations.
- To identify specific points within the examination where these changes are most likely to occur.
Main Methods:
- Blood pressure was measured at seven distinct points in 107 patients undergoing barium enema.
- Patient demographics and symptoms related to postural changes were recorded.
Main Results:
- A statistically significant decrease in blood pressure was observed in patients over 60 years old upon standing.
- Hypotension occurred in 14% of patients experiencing symptoms when standing.
- Symptomatic patients often had longer examination durations.
Conclusions:
- Hypotension during barium enema is most frequent upon standing, particularly in patients over 60 and those with symptoms.
- These at-risk patients may be prone to fainting and could benefit from modified examination techniques.
- Consideration of alternative procedures is recommended for high-risk individuals.
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