Document Detail


Effects of uneven elastic loads on breathing pattern of anesthetized and conscious men.
MedLine Citation:
PMID:  877445     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In anesthetized subjects rib cage strapping (RCS) did not change tidal volume (VT) and increased ventilation (V), whereas abdomen strapping (AS) markedly decreased VT and V. Both kinds of strapping decreased expiratory duration (TE), but did not change inspiratory duration (TI) and breathing rate. RCS and AS decreased lung volume by about 200 ml and increased the elastance of the repiratory system by 12 cm H2O/1 and 9 CM H20/l, repectively. The changes produced are mainly due to mechanical factors, although reflexes also seem to be operating in some cases. In conscious subjects RCS decreased VT, TI, TE and did not change V, whereas AS did not change these parameters. The different changes in conscious and anesthetized subjects show the effects of cortical influences, which also partly explain the differen effects elicited in conscious subjects by RCS and AS. The effects produced by RCS are mainly due to the sensation of hindrance to rib cage expansion, rather than to that of rib cage squeezing, as shown by experiments of RCS without reduction of rib cage volume.
Authors:
E Agostoni; E D'angelo; G Torri; L Ravenna
Related Documents :
9038445 - Respiratory effects of spinal anaesthesia for caesarean section.
7204175 - Pulmonary mechanics during exercise in subjects with chronic airflow obstruction.
3121575 - Effects of expiratory resistive load on respiratory motor output in conscious humans.
14566565 - Relationship between double product break point, lactate threshold, and ventilatory thr...
20633535 - Regular exercise reduces colon tumorigenesis associated with suppression of inos.
3421125 - Spontaneous periodic contraction of the ampullar segment of the human fallopian tube in...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Respiration physiology     Volume:  30     ISSN:  0034-5687     ISO Abbreviation:  Respir Physiol     Publication Date:  1977 Jun 
Date Detail:
Created Date:  1977-08-12     Completed Date:  1977-08-12     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0047142     Medline TA:  Respir Physiol     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  153-68     Citation Subset:  IM; S    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Abdomen
Adult
Anesthesia*
Bandages
Cerebral Cortex / physiology
Consciousness*
Elasticity
Humans
Lung / physiology
Lung Compliance
Male
Middle Aged
Respiration*
Stress, Mechanical*
Thorax
Tidal Volume
Ventilation-Perfusion Ratio

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


Previous Document:  Diffusion of water vapor in binary and ternary gas mixtures at increased pressures.
Next Document:  Hypoxic ventilatory response of cats at high altitude: an interpretation of 'blunting'.