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Peripheral pulse palpation: an unreliable physical sign
S Brearley1, C P Shearman, M H Simms
1Department of Surgery, Selly Oak Hospital, Birmingham.
Summary
Pulse palpation for peripheral vascular disease is unreliable, especially for posterior tibial pulses. Accuracy improves with experience and systolic blood pressure, but it should supplement objective measurements.
Area of Science:
- Vascular Surgery
- Clinical Diagnostics
- Physical Examination
Background:
- Peripheral vascular disease assessment relies on physical examination.
- Pulse palpation is a traditional diagnostic method for assessing arterial blood flow.
- The reliability of pulse palpation varies significantly with observer experience and specific pulse location.
Purpose of the Study:
- To evaluate the accuracy and reliability of pulse palpation in diagnosing peripheral vascular disease.
- To compare the sensitivity and specificity of palpating different pulses (femoral vs. posterior tibial).
- To identify factors influencing the accuracy of pulse palpation.
Main Methods:
- Fifty observers, including vascular surgeons, assessed femoral and posterior tibial pulses in patients with and without peripheral vascular disease.
- Palpable pulses were defined by agreement between two experienced vascular surgeons.
- Sensitivity, false-positive rates, and correlation with systolic blood pressure were analyzed.
Main Results:
- High sensitivity (≥95%) for femoral pulse palpation, but lower sensitivity (33%-60%) for posterior tibial pulse.
- Up to 20% false-positive observations and over 10% missed diagnoses in both healthy and symptomatic limbs.
- Accuracy strongly correlated with systolic blood pressure and observer experience.
Conclusions:
- Pulse palpation alone is an unreliable diagnostic sign for peripheral vascular disease.
- Observer experience and teaching are crucial for improving palpation skills.
- Pulse palpation should be used adjunctively with objective measurements for clinical management.