Linked Life Data

9151515

Source:http://linkedlifedata.com/resource/pubmed/id/9151515

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1997-6-12
pubmed:abstractText
We tried to verify, in a clinical setting, the hypothesis that enhanced perception of dyspnoea (PD) and increased respiratory drive (RD): 1) relate to each other; and 2) elicit an integrated response that leads to a decrease in RD and tidal volume (VT) aimed at minimizing PD. In 34 patients with chronic obstructive pulmonary disease (COPD), dyspnoea was graded on a four-point scale after a Medical Research Council (MRC) questionnaire concerning respiratory symptoms. Patients were divided into four groups according to the dyspnoea score. Pulmonary volumes, arterial blood gases, VT, respiratory frequency (fR), inspiratory time (tI), expiratory time (tE), maximal inspiratory pressure (MIP), and maximal expiratory pressure (MEP) were measured. RD was also assessed in terms both of mouth occlusion pressure (P0.1) and electromyographic (EMG) activity of the respiratory muscles. Increase in dyspnoea rating was associated with decrease in vital capacity (VC), forced expiratory volume in one second (FEV1), MIP, VT and tI; and increase in arterial carbon dioxide tension (Pa,CO2), P0.1, and EMG (analysis of variance (ANOVA) and Bonferroni's test). A rapid and shallow pattern of breathing (RSB) characterized the group with the highest dyspnoea rating. Stepwise multiple regression analysis showed that: 1) tI and FEV1 accounted for a substantial proportion of the variability in VT and tI, respectively; 2) VT and MIP, together, predicted a substantial proportion of the variability in Pa,CO2 (r2 = 0.50). We conclude that, in patients with chronic obstructive pulmonary disease clinical rating of dyspnoea appears to be associated with muscle weakness and increase in respiratory drive. The increased respiratory drive is modulated into a rapid and shallow pattern of breathing, which leads to hypercapnia.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
1122-0643
pubmed:author
pubmed:issnType
Print
pubmed:volume
52
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
18-23
pubmed:dateRevised
2008-6-2
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
Breathlessness and control of breathing in patients with COPD.
pubmed:affiliation
Fondazione Pro Juventute Don C. Gnocchi, Pozzolatico, Florence, Italy.
pubmed:publicationType
Journal Article