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Pulmonary function after complete unilateral phrenic nerve transection.

Wen-Dong Xu1, Yu-Dong Gu, Jing-Bo Lu

  • 1Department of Hand Surgery, Hua-Shan Hospital, Shanghai Medical College, Fudan University, Shanghai, China.

Journal of Neurosurgery
|October 21, 2005
PubMed
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Phrenic nerve transfer surgery in young adults can lead to temporary diaphragmatic paralysis and reduced inspiratory force. However, most pulmonary function parameters recover within one year post-surgery.

Area of Science:

  • Thoracic surgery
  • Pulmonary function testing
  • Nerve transfer procedures

Background:

  • Pulmonary function after phrenic nerve transfer surgery is not well understood due to anatomical variations.
  • Phrenic nerve transfer involves severing the nerve before diaphragm entry, impacting respiratory mechanics.

Purpose of the Study:

  • To assess pulmonary function in patients before and after full-length phrenic nerve transfer.
  • To evaluate the long-term effects of phrenic nerve transfer on respiratory capacity.

Main Methods:

  • Fifteen patients with complete brachial plexus palsy underwent phrenic nerve transfer to the musculocutaneous nerve.
  • Pulmonary function was retrospectively analyzed pre- and post-surgery over a 42-48 month follow-up period.

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Main Results:

  • No patients reported pulmonary issues, but diaphragmatic paralysis and elevation were observed post-surgery.
  • Pulmonary functional parameters like vital capacity and lung capacity returned to preoperative levels within one year.
  • Maximal inspiratory pressure significantly decreased by approximately 20% and remained reduced even at 4 years post-surgery.

Conclusions:

  • Unilateral phrenic nerve transection can cause diaphragmatic paralysis and decreased inspiratory muscle force in young patients.
  • Most pulmonary function parameters recover to baseline within one year following phrenic nerve transfer surgery.
  • Reduced maximal inspiratory pressure is a persistent finding after this procedure.