Long-Term Pulmonary Function Postspinal Cord Injury

Area of Science:

• Pulmonary Medicine
• Neurology
• Rehabilitation Science

Background:

• Spinal cord injury (SCI) significantly impacts respiratory function, necessitating long-term monitoring.
• Understanding the trajectory of pulmonary function post-SCI is crucial for patient management and predicting outcomes.

Purpose of the Study:

• To investigate the long-term progression of pulmonary function tests (PFTs) in adult patients with SCI.
• To assess for a biphasic pattern of pulmonary function changes (initial improvement followed by decline) after SCI.

Main Methods:

• Retrospective cohort study of 1394 adult patients with SCI admitted between 1997 and 2022.
• Analysis of annual pulmonary function test (PFT) data, including Forced Vital Capacity (FVC) and Forced Expiratory Volume in one second (FEV1).
• Comparison of PFT values at specific time intervals (<1 year, 1-2 years, >6 years post-injury) and assessment of motor completeness association.

Main Results:

• Forced Vital Capacity (FVC) and Forced Expiratory Volume in one second (FEV1) showed a significant initial increase within 1-2 years post-SCI.
• These pulmonary function measures subsequently declined to below baseline levels by 6 years after injury.
• Motor completeness was significantly associated with the pattern of pulmonary function changes, with a steeper increase and less decline in the motor-complete group.

Conclusions:

• Pulmonary function in SCI patients follows a biphasic pattern: initial improvement followed by a significant decline over time.
• By 6 years post-injury, pulmonary function falls below initial levels, highlighting the progressive nature of respiratory compromise.
• Further research with comprehensive datasets is needed to identify factors influencing these long-term pulmonary changes in SCI.