The Science Journal of the American Association for Respiratory Care

2006 OPEN FORUM Abstracts

THE USE OF PREOPERATIVE FEV1% DURING NONINVASIVE VENTILATION IN RESPIRATORY FAILURE AFTER CABG

Ayse Baysal, M.D., Sabri Dagsali, M.D., Gurkan Komurcu, Cem Ariyurk,Ufuk Ciloglu, M.D. Anesthesiology and Reanimation, Dr. S. Ersek Thoracic and Cardiovascular Surgery Hospital, Istanbul, Kadikoy, Turkey.

Introduction: Noninvasive mechanical ventilation (NIMV) therapy have been used in acute respiratory failure successully. Postoperatively hypoxemia may have different causes and may not respond to NIMV. The goal of this study is to compare the efficiency of FEV1% ( forced expiratory volume in first second percent) and arterial blood gas analysis on the success rate of NIMV. Material and

Methods:
Retrospective analysis of 60 patients that required NIMV during period of July 2002 and December 2005. The patients were divided into group 1 (n=30) with normal lung functions (NL), and group 2 (n=30) with chronic obstructive pulmonary disease (COPD). Demographic data, preoperative FEV1 % , arterial blood gases of preoperative, NIMV at 1 hour and 12 hour postoperatively, were compared in table 1. 36 patients (% 60) had hypercarbic, whereas 24 (%40) had hypoxemic respiratory failure. The start of the support was 60

Results:
The FEV1% on group 1 was was significantly higher than group 2 (100.6

Conclusion: There was no significant correlation between preoperative %FEV1 and success of NIMV. The decrease in PaCO2 level should persist to prevent acidosis and for effective response to therapy.

Table 1. Demographic data, preoperative FEV1%, and arterial blood gases in group NL and in group COPD preoperative, 1 and 12 hour after NIMV.

Parameters Group NL Group COPD p
Age (years) 63 60 NS
Height (cm) 1.67 1.61 NS
Weight (kg) 74 68.4 NS
%FEV1 101 61 <0.05
pH (A) 7.23 7.24 NS
paO2 (mmHg)(A) 59 64 NS
paCO2 (mmHg)(A) 78 81.7 NS
HCO3 (A) 79 82 NS
SaO2 (%)(A) 33 33 NS
pH (B) 7.35 7.36 NS
paO2 (mmHg)(B) 98.23 102 NS
paCO2 (mmHg)(B 56 62 NS
HCO3 (B) 30 31 NS
SaO2 (%)(B) 93 95.3 NS
pH (C) 7.33 7.3 0.05
paO2 (mmHg)(C) 110 99 NS
paCO2 (mmHg)(C 58 68 0.05
HCO3 (C) 31 34 NS
SaO2 (%)(C) 98 95 NS


NS:not significant, p

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