Document Detail


Effectiveness of a heat and moisture exchanger in preventing hyperpnoea induced bronchoconstriction in subjects with asthma.
MedLine Citation:
PMID:  3424269     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effect of a heat and moisture exchanger, a device with hygroscopic material for conditioning inspired air, on hyperpnoea induced bronchoconstriction was studied in nine non-smoking volunteers with asthma, aged 19-32 years. Each had previously shown an increase of at least 100% in specific airways resistance (sRaw) to isocapnic hyperpnoea with dry air. On two separate days the subject performed isocapnic hyperpnoea with dry air at 60-70 l min-1 for five minutes. Before, immediately after, and five minutes after completion of a test sRaw measurements were made. Heat and moisture exchangers were placed in the breathing circuit on one of the two days. All subjects had an increase in sRaw of 100% or more without the heat and moisture exchangers (average increase 300%) but were protected from bronchoconstriction with the devices in place (average increase 7%) (p less than 0.005). The exchanger's resistance to airflow was less than 1 cm H2O for flow rates of 100 l min-1. A heat and moisture exchanger designed as a facemask or mouthpiece may allow a person with asthma to exercise without the need for prophylactic drugs.
Authors:
T R Gravelyn; M Capper; W L Eschenbacher
Related Documents :
9202949 - Effects of different carbohydrate-electrolyte beverages on the appearance of ingested d...
15996609 - Treating acute low back pain with continuous low-level heat wrap therapy and/or exercis...
6381439 - Heat acclimation in cystic fibrosis.
19943059 - Thermometry and calorimetry assessment of sweat response during exercise in the heat.
3874709 - The use of physical agents in rehabilitation of athletic injuries.
24531429 - The role of self-reported individual differences in preference for and tolerance of exe...
19056999 - Locomotor exercise induces long-lasting impairments in the capacity of the human motor ...
9227489 - Augmentation of deglutitive upper esophageal sphincter opening in the elderly by exercise.
23547679 - Clinical and diagnostic features of inflammatory airway disease subtypes in horses exam...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Thorax     Volume:  42     ISSN:  0040-6376     ISO Abbreviation:  Thorax     Publication Date:  1987 Nov 
Date Detail:
Created Date:  1988-02-25     Completed Date:  1988-02-25     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  0417353     Medline TA:  Thorax     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  877-80     Citation Subset:  IM    
Affiliation:
Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor 48109-0026.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adult
Airway Resistance
Asthma / physiopathology,  prevention & control*
Bronchial Provocation Tests
Female
Hot Temperature
Humans
Humidity
Male
Respiration*
Respiratory Therapy / instrumentation*
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Pattern of collagen types and molecular structure of collagen in acute post-traumatic pulmonary fibr...
Next Document:  Phrenic nerve stimulation in normal subjects and in patients with diaphragmatic weakness.