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Brachial plexus nerve block exhibits prolonged duration in the elderly
Xavier Paqueron1, Gilles Boccara, Mouhssine Bendahou
1Department of Anesthesiology, Emergency Medicine and Surgery, Centre Hospitalier Universitaire (CHU) Pitié-Salpêtrière, Paris, France. xavier.paqueron@psl.ap-hop-paris.fr
Anesthesiology
|November 2, 2002
Summary
Elderly patients experience significantly longer durations of sensory and motor block after a mid-humeral peripheral nerve block. Age is a key factor influencing block duration in this population.
Area of Science:
- Anesthesiology
- Geriatric Medicine
- Regional Anesthesia
Background:
- Upper limb trauma is common in the elderly, often managed with peripheral nerve blocks.
- Limited data exists on the characteristics of these blocks in older adults.
Purpose of the Study:
- To prospectively assess the onset and duration of the mid-humeral peripheral nerve block in elderly versus young patients.
- To determine if age influences the efficacy and longevity of this specific nerve block.
Main Methods:
- A mid-humeral block using 0.75% ropivacaine was administered to patients >70 years (elderly) and <70 years (young).
- Injected volumes were 5 mL per nerve (musculocutaneous, radial, ulnar, median).
- Onset and duration of complete sensory and motor blockade were recorded and analyzed.
Main Results:
- Elderly patients (median age 77) showed similar onset times but significantly longer durations of sensory (390 min vs. 150 min) and motor (357 min vs. 150 min) blockade compared to younger patients (median age 39).
- Age demonstrated a significant positive correlation with the duration of sensory block (rho = 0.56).
Conclusions:
- Age is a significant determinant of peripheral nerve block duration in the upper extremity.
- Elderly patients may exhibit increased sensitivity to local anesthetics, leading to prolonged block effects.