Document Detail

Effects of periodic positive airway pressure by mask on postoperative pulmonary function.
MedLine Citation:
PMID:  3519107     Owner:  NLM     Status:  MEDLINE    
Postoperative pulmonary complications, alveolar-arteriolar oxygen difference ([A-a]O2-diff), peak expiratory flow (PEF) and forced vital capacity (FVC) were compared in patients using continuous positive airway pressure (CPAP) and positive expiratory pressure (PEP) administered by face mask against those of a control group using a deep-breathing device (Triflo). Forty-three consecutive, randomized patients undergoing elective upper abdominal surgery were included. CPAP, PEP and Triflo were administered for 30 consecutive breaths in every waking hour for three days postoperatively. The (A-a)O2-difference increased equally and significantly in the three groups after surgery, reaching a maximum on the first postoperative day. After this day, however, (A-a)O2-diff decreased in the CPAP and PEP groups, being significantly lower in the PEP group compared to the control group, two days postoperatively (p less than 0.05) and significantly lower in both the PEP and CPAP groups three days postoperatively (p less than 0.001 and p less than 0.05, respectively.) PEF did not differ significantly between the groups before or after surgery, while FVC was significantly higher in the PEP and CPAP groups, compared to control, on the third postoperative day (p less than 0.05). Atelectatic consolidation was observed in six of 15 patients in the control group three days postoperatively, the incidence being significantly lower in both the PEP group (0 of 15, p less than 0.001) and the CPAP group (one of 13, p less than 0.05). We concluded that periodic face mask administration of CPAP and PEP are superior to deep breathing exercises with respect to gas exchange, preservation of lung volumes and development of atelectasis after upper abdominal surgery. We also conclude that the simple and commercially available PEP mask is as effective as the more complicated CPAP system.
S E Ricksten; A Bengtsson; C Soderberg; M Thorden; H Kvist
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Chest     Volume:  89     ISSN:  0012-3692     ISO Abbreviation:  Chest     Publication Date:  1986 Jun 
Date Detail:
Created Date:  1986-07-16     Completed Date:  1986-07-16     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0231335     Medline TA:  Chest     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  774-81     Citation Subset:  AIM; IM    
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MeSH Terms
Abdomen / surgery
Breathing Exercises
Evaluation Studies as Topic
Lung Diseases / etiology,  prevention & control*
Middle Aged
Positive-Pressure Respiration / instrumentation,  methods*
Postoperative Care / methods*
Postoperative Complications / prevention & control
Pulmonary Atelectasis / etiology,  radiography
Radiography, Thoracic
Random Allocation
Respiratory Function Tests

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

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