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The acute effect of peripheral nerve transection on digital thermoregulatory function
David S Ruch1, Jeff Vallee, Zhongyu Li
1Department of Orthopaedic Surgery, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA.
The Journal of Hand Surgery
|May 29, 2003
Summary
Peripheral nerve injury significantly impacts blood flow and sensation in the affected area. This study found reduced cutaneous perfusion and altered thermoregulation following nerve damage.
Area of Science:
- Neuroscience
- Vascular Biology
- Surgical Research
Background:
- Major peripheral nerves are crucial for adrenergic innervation.
- Peripheral nerve injury can disrupt autonomic vasomotor function.
- Understanding nerve-blood flow interactions is vital for patient recovery.
Purpose of the Study:
- To test if peripheral nerve injury affects cutaneous perfusion within its sensory territory.
- To determine if nerve injury alters digital blood flow, pain, or cold sensitivity.
- To investigate the role of peripheral nerves in regulating blood flow.
Main Methods:
- Evaluated 9 patients with median or ulnar nerve transection and neurorrhaphy.
- Assessed digital perfusion response to cold stress using laser Doppler fluxmetry.
- Collected subjective patient data on pain, numbness, and cold sensitivity.
Main Results:
- Affected hands showed decreased cutaneous perfusion during cold stress.
- Laser Doppler imaging revealed reduced perfusion in digits innervated by the injured nerve.
- Patients reported significant digital numbness, pain, and cold sensitivity.
Conclusions:
- Peripheral nerve injury alters cutaneous perfusion and thermoregulatory function.
- Nerve damage disrupts the autonomic control of blood flow in the affected digits.
- Findings highlight the link between nerve integrity and vascular health.