August 1, 1996Catheterization and Cardiovascular Diagnosis
Frequency of a positive modified Allen's test in 1,000 consecutive patients undergoing cardiac catheterization
Key result
Modified Allen's test is clearly positive in ~49% of patients undergoing cardiac catheterization.
- n=1,000
Why the study?
What is the frequency of positive, moderately positive, and negative modified Allen's tests in patients undergoing cardiac catheterization?
Population
1,000 consecutive patients undergoing cardiac catheterization, mean age 62.3 years, 64% male.
Design
Cross-sectional
Authors
Discussion
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Member takes
Implication
Alerts to frequent negative Allen's tests before catheterization; hypothesis-generating for its role in guiding radial access decisions.
Study Design
Type
Cross-Sectional (n=1,000)
Structured PICO
What is the frequency of positive, moderately positive, and negative modified Allen's tests in patients undergoing cardiac catheterization?
P
Population
1,000 consecutive patients (mean age 62.3 years, 36% female) undergoing cardiac catheterization.
E
Exposure
Modified Allen's test performed on the right wrist twice by different trained examiners.
O
Outcome
Percentage of patients with clearly positive (< 5 sec), moderately positive (5-9 sec), or negative (≥ 10 sec) modified Allen's test.surrogate
Over a quarter of patients undergoing cardiac catheterization have a negative modified Allen's test (≥ 10 seconds), highlighting the variability in collateral hand circulation prior to potential radial access.
Cite This Study
Benit et al. (1996) conducted a cross-sectional in Patients undergoing cardiac catheterization (n=1,000). Modified Allen's test was evaluated on Frequency of a clearly positive (< 5 sec), moderately positive (5-9 sec), or negative (≥ 10 sec) modified Allen's test. Among 1,000 consecutive patients undergoing cardiac catheterization, the modified Allen's test was clearly positive in 49%, moderately positive in 24%, and negative in 27%.