The threshold for sensing airflow resistance during tidal breathing rises in old age: implications for elderly patients with obstructive airways diseases.
Age Ageing
; 38(5): 548-52, 2009 Sep.
Article
en En
| MEDLINE
| ID: mdl-19589812
ABSTRACT
OBJECTIVE:
to determine whether the ability of elderly subjects to detect a rise in airflow resistance is attenuated in old age, and to measure the magnitude and variability of such a change.METHODS:
we studied 124 healthy adults aged 20-86 years. Progressive external airflow resistance loading was used to measure the inspiratory and expiratory load detection thresholds (LDTs) during tidal breathing at rest.RESULTS:
the mean inspiratory LDT rose from 4.00 (3.06 SD) kPa.s/L in the 20-39 age group to 6.51 (6.20) in the 40-64 age group (NS) and 29.10 (13.58) in the 65 + age group (P < 0.00001). The inspiratory LDT was significantly correlated with age, mainly due to the higher thresholds in people over the age of 65 (r = 0.7860, P < 0.00001), but did not correlate with age-corrected forced vital capacity or respiratory rate. Expiratory LDT values and correlations were very similar. Day-to-day variability in LDTs tended to be higher in older subjects.CONCLUSION:
the threshold for detecting external resistive loads during tidal breathing rises in old age. This appears to be a consequence of ageing processes rather than pathology, and might be a manifestation of a fall in proprioceptive acuity in elderly people. This finding has clinical implications for the self-management of asthma in old age. There is a need to conduct a similar study in patients with airways disease.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Propiocepción
/
Umbral Sensorial
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Envejecimiento
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Resistencia de las Vías Respiratorias
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Inhalación
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Espiración
Límite:
Adult
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Aged
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Aged80
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Age Ageing
Año:
2009
Tipo del documento:
Article
País de afiliación:
Reino Unido