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Pulmonary function in acute cervical cord injury

J R Ledsome, J M Sharp

    The American Review of Respiratory Disease
    |July 1, 1981
    PubMed
    Summary

    Spinal cord injury significantly impacts lung function, reducing vital capacity. Recovery is observed within weeks, with expiratory flow rates and oxygen levels improving over time.

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    Area of Science:

    • Pulmonary Medicine
    • Neurology
    • Rehabilitation Medicine

    Background:

    • Spinal cord injury (SCI) can severely impair respiratory function due to damage to neural pathways controlling breathing.
    • The extent of pulmonary compromise is often related to the level and completeness of the SCI.

    Purpose of the Study:

    • To longitudinally assess pulmonary function in patients following spinal cord injury.
    • To determine the relationship between the level of SCI and the degree of respiratory impairment.
    • To evaluate the recovery patterns of vital capacity and expiratory flow rates post-injury.

    Main Methods:

    • Pulmonary function tests, including vital capacity and expiratory flow rates, were conducted at multiple time points (1 week, 3 weeks, 5 weeks, 3 months, 5 months) post-SCI.
    • Patients were stratified based on the level of spinal cord transection (e.g., C4, C5-C6).
    • Arterial blood gases were analyzed to assess oxygenation and carbon dioxide levels.

    Main Results:

    • Patients with complete C5-C6 spinal cord transection had a vital capacity of 30% of predicted in the first week post-injury.
    • Injuries at the C4 level resulted in even lower vital capacities.
    • A significant increase in vital capacity was noted within 5 weeks, with a doubling observed by 3 months post-injury.
    • Expiratory flow rates demonstrated a direct correlation with vital capacity.
    • A high incidence of arterial hypoxemia was present in the acute phase, irrespective of ventilatory ability.

    Conclusions:

    • Spinal cord injury leads to substantial, level-dependent reductions in pulmonary function, particularly vital capacity.
    • Pulmonary function shows a significant recovery trend in the weeks and months following spinal cord injury.
    • Expiratory flow rates are closely linked to vital capacity recovery.
    • Acute arterial hypoxemia is common after spinal cord injury, necessitating careful monitoring.

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