Abstract
Objective: To determine the expected vital capacity in persons with chronic spinal cord injury (SCI) in relation to injury level, completeness of injury, smoking and duration of injury, as an aid to diagnosis and management of respiratory complications.
Setting: A New York City veterans' hospital and a Los Angeles public rehabilitation hospital.
Methods: Case series from the two hospitals were pooled. Participants (adult outpatients with SCI of duration >1 year, not ventilator-dependent) were evaluated by conventional forced expiratory spirometry. Cross-sectional analysis was performed, using multiple regression, on the entire population and defined subgroups. The principal outcome measure was forced vital capacity (FVC).
Results: In the subjects with complete-motor lesions, FVC ranged from near 100% of normal predicted values in the group with low paraplegia, to less than 50% in those with high tetraplegia. Incomplete lesions mitigated FVC loss in tetraplegia. In subjects with paraplegia, longer duration of injury was associated with greater loss, and smoking-related loss was evident at older but not at younger ages, presumably due to greater pack years in older subjects.
Conclusions: Vital capacity/SCI level relationships determined here may have diagnostic and prognostic value. Smoking-related FVC loss is important in persons with SCI as in others, although at higher levels it may be obscured by SCI-related loss.
Sponsorship: Supported in part by National Institute of Disability and Rehabilitation Research, Office of Special Education and Rehabilitative Services, US Department of Education (Grants H133N00026, H133B30029, and H133B70011); Eastern Paralyzed Veterans Association; National Institute of Environmental Health Sciences (Grant 1P01ES90581-0); and US Environmental Protection Agency (Grant R826708-01-0).
Spinal Cord (2001) 39, 263–268.
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Acknowledgements
The authors thank Jerry Valencia and Clementine Brown (pulmonary technologists, Rancho Los Amigos National Rehabilitation Center), and Sheryl Terrell (medical research associate, Rancho Los Amigos National Rehabilitation Center) for their assistance. Supported in part by National Institute of Disability and Rehabilitation Research, Office of Special Education and Rehabilitative Services, US Department of Education (Grants H133N00026, H133B30029, and H133B70011); Eastern Paralyzed Veterans Association; National Institute of Environmental Health Sciences (Grant 1P01ES90581-0); and US Environmental Protection Agency (Grant R826708-01-0).
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Linn, W., Spungen, A., Gong, Jr, H. et al. Forced vital capacity in two large outpatient populations with chronic spinal cord injury. Spinal Cord 39, 263–268 (2001). https://doi.org/10.1038/sj.sc.3101155
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DOI: https://doi.org/10.1038/sj.sc.3101155
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