Skip to main content
NCBI home page
Thorax logoLink to Thorax
. 1995 Mar;50(3):230–234. doi: 10.1136/thx.50.3.230

Software compensation for lung volume in assessment of inspiratory muscle strength and endurance.

D K McKenzie 1, S C Gandevia 1, R B Gorman 1, J B Leeper 1
PMCID: PMC1021183  PMID: 7660333

Abstract

BACKGROUND--To increase the sensitivity of measurements of maximal inspiratory pressure (MIP) as a test of inspiratory muscle strength and endurance, software was developed to correct for variation in lung volume. METHODS--Using a body plethysmograph to determine absolute lung volume during each manoeuvre, values for MIP were expressed as a percentage of the pressure "expected" from the unfatigued MIP/lung volume relation in each subject. RESULTS--The method reduced the variance in peak and average pressure during a series of 18 MIP manoeuvres of 10 seconds duration separated by rest intervals of 10 seconds. CONCLUSIONS--The correlation between average pressure and contraction number was improved significantly by the MIP/lung volume correction. This simple correction has many applications in measurements of the MIP.

Full text

PDF
230

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Allen G. M., McKenzie D. K., Gandevia S. C., Bass S. Reduced voluntary drive to breathe in asthmatic subjects. Respir Physiol. 1993 Jul;93(1):29–40. doi: 10.1016/0034-5687(93)90065-i. [DOI] [PubMed] [Google Scholar]
  2. Bigland-Ritchie B. Muscle fatigue and the influence of changing neural drive. Clin Chest Med. 1984 Mar;5(1):21–34. [PubMed] [Google Scholar]
  3. Black L. F., Hyatt R. E. Maximal respiratory pressures: normal values and relationship to age and sex. Am Rev Respir Dis. 1969 May;99(5):696–702. doi: 10.1164/arrd.1969.99.5.696. [DOI] [PubMed] [Google Scholar]
  4. COOK C. D., MEAD J., ORZALESI M. M. STATIC VOLUME-PRESSURE CHARACTERISTICS OF THE RESPIRATORY SYSTEM DURING MAXIMAL EFFORTS. J Appl Physiol. 1964 Sep;19:1016–1022. doi: 10.1152/jappl.1964.19.5.1016. [DOI] [PubMed] [Google Scholar]
  5. Desmond K. J., Demizio D. L., Allen P. D., Beaudry P. H., Coates A. L. An alternate method for the determination of functional residual capacity in a plethysmograph. Am Rev Respir Dis. 1988 Feb;137(2):273–276. doi: 10.1164/ajrccm/137.2.273. [DOI] [PubMed] [Google Scholar]
  6. Gandevia S. C., McKenzie D. K. Activation of the human diaphragm during maximal static efforts. J Physiol. 1985 Oct;367:45–56. doi: 10.1113/jphysiol.1985.sp015813. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Gandevia S. C., McKenzie D. K., Plassman B. L. Activation of human respiratory muscles during different voluntary manoeuvres. J Physiol. 1990 Sep;428:387–403. doi: 10.1113/jphysiol.1990.sp018218. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Gorman R. B., McKenzie D. K., Gandevia S. C., Plassman B. L. Inspiratory muscle strength and endurance during hyperinflation and histamine induced bronchoconstriction. Thorax. 1992 Nov;47(11):922–927. doi: 10.1136/thx.47.11.922. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Hershenson M. B., Kikuchi Y., Loring S. H. Relative strengths of the chest wall muscles. J Appl Physiol (1985) 1988 Aug;65(2):852–862. doi: 10.1152/jappl.1988.65.2.852. [DOI] [PubMed] [Google Scholar]
  10. Hubmayr R. D., Litchy W. J., Gay P. C., Nelson S. B. Transdiaphragmatic twitch pressure. Effects of lung volume and chest wall shape. Am Rev Respir Dis. 1989 Mar;139(3):647–652. doi: 10.1164/ajrccm/139.3.647. [DOI] [PubMed] [Google Scholar]
  11. McKenzie D. K., Gandevia S. C. Influence of muscle length on human inspiratory and limb muscle endurance. Respir Physiol. 1987 Feb;67(2):171–182. doi: 10.1016/0034-5687(87)90039-9. [DOI] [PubMed] [Google Scholar]
  12. Newell S. Z., McKenzie D. K., Gandevia S. C. Inspiratory and skeletal muscle strength and endurance and diaphragmatic activation in patients with chronic airflow limitation. Thorax. 1989 Nov;44(11):903–912. doi: 10.1136/thx.44.11.903. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Rochester D. F., Braun N. M., Arora N. S. Respiratory muscle strength in chronic obstructive pulmonary disease. Am Rev Respir Dis. 1979 Feb;119(2 Pt 2):151–154. doi: 10.1164/arrd.1979.119.2P2.151. [DOI] [PubMed] [Google Scholar]
  14. Roussos C., Fixley M., Gross D., Macklem P. T. Fatigue of inspiratory muscles and their synergic behavior. J Appl Physiol Respir Environ Exerc Physiol. 1979 May;46(5):897–904. doi: 10.1152/jappl.1979.46.5.897. [DOI] [PubMed] [Google Scholar]

Articles from Thorax are provided here courtesy of BMJ Publishing Group

RESOURCES