Cited by 63Respiratory Support and MechanismsMuscle Physiology and DisordersNeuroscience of respiration and sleep

Influence of acute lung volume change on contractile properties of human diaphragm

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Polkey, Michael I., Hamnegård, Carl-Hugo, Hughes, Philip D., Rafferty, Gerrard F., Green, Malcolm, Moxham, John·1998·Journal of Applied Physiology

Abstract

The effect of stimulus frequency on the in vivo pressure generating capacity of the human diaphragm is unknown at lung volumes other than functional residual capacity. The transdiaphragmatic pressure (Pdi) produced by a pair of phrenic nerve stimuli may be viewed as the sum of the Pdi elicited by the first (T1 Pdi) and second (T2 Pdi) stimuli. We used bilateral anterior supramaximal magnetic phrenic nerve stimulation and a digital subtraction technique to obtain the T2 Pdi at interstimulus intervals of 999, 100, 50, 33, and 10 ms in eight normal subjects at lung volumes between residual volume and total lung capacity. The reduction in T2 Pdi that we observed as lung volume increased was greatest at long interstimulus intervals, whereas the T2 Pdi obtained with short interstimulus intervals remained relatively stable over the 50% of vital capacity around functional residual capacity. For all interstimulus intervals, the total pressure produced by the pair decreased as a function of increasing lung volume. These data demonstrate that, in the human diaphragm, hyperinflation has a disproportionately severe effect on the summation of pressure responses elicited by low-frequency stimulations; this effect is distinct from and additional to the known length-tension relationship.

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Crossref · 10.1152/jappl.1998.85.4.1322

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45 of 45 references verified0 citation errors · 0 not checkable

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  • The ability of the respiratory muscles to generate pressure decreases at high lung volumes in humans.

    “Indeed, the ability of the respiratory muscles to generate pressure decreases at high lung volumes in humans.58,60”

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Authors
Polkey, M. I., Hamnegård, C.-H., Hughes, P. D., Rafferty, G. F., Green, M., & Moxham, J.
Affiliations
  • King's College London (GB)
  • Sahlgrenska University Hospital (SE)
  • Royal Brompton Hospital (GB)
Venue
Journal of Applied Physiology
Published
1998-10-01
Volume
85
Issue
4
Pages
1322-1328
ISSN
  • 0161-7567 (ISSN-L)
  • 8750-7587
  • 1522-1601
OpenAlex
W2159313634
Cited by
63
References
45
Citations by year
2026: 2 · 2024: 1 · 2022: 1 · 2020: 3 · 2019: 2 · 2018: 1 · 2017: 2 · 2016: 3 · 2015: 3 · 2014: 7 · 2013: 6 · 2012: 3
FWCI
1.78
Type
journal article
Language
en
Open access
Locations
  • Journal of Applied Physiology (publishedVersion)
  • PubMed (publishedVersion)
  • Research Portal (King's College London) (submittedVersion)
Funders
Menzies Centre for Australian Studies, King's College London, University of London
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Respiratory Support and Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Neuroscience of respiration and sleep
Keywords
diaphragm, lung volume, hyperinflation, transdiaphragmatic pressure, phrenic nerve stimulation, stimulation frequency, diaphragm contractility, length-tension relationship, respiratory muscles
MeSH terms
Adult, Diaphragm, Female, Humans, Lung Volume Measurements, Magnetics, Male, Muscle Contraction, Phrenic Nerve, Pressure, Vital Capacity, Respiratory Mechanics

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