• Users Online: 275
  • Print this page
  • Email this page
Year : 2013  |  Volume : 2  |  Issue : 2  |  Page : 79-84

The effects of positive airway pressure ventilation during cardiopulmonary bypass on pulmonary function following open heart surgery

1 Rajaie Cardiovascular Medical and Research Center, Tehran University of Medical Sciences, Tehran, IR Iran
2 Heart Valve Disease Research Center, Rajaie Cardiovascular Medical and Research Center, Tehran University of medical sciences, Tehran, IR Iran

Correspondence Address:
Faranak Kargar
Rajaei Cardiovascular Medical and Research Center, Tehran University of Medical Sciences, Tehran
IR Iran
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.5812/cardiovascmed.8129

Rights and Permissions

Background: Intrapulmonary shunt as a result of atelectasis following cardiac surgeries is an important and common postoperative complication that results into pulmonary dysfunction typically lasting more than a week following surgery. Different methods have been provided to prevent these complications. Objectives: In order to prevent postoperative pulmonary complications, investigation of the effectiveness of continuous positive airway pressure (CPAP) and intermittent mandatory ventilation (IMV) during cardiopulmonary bypass (CPB) in patients undergoing coronary artery bypass grafting (CABG). Materials and Methods: In this prospective interventional study, 300 patients, candidate for elective CABG (On-Pump), were randomly allocated to 3 groups: A, B, C. Group A (CPAP) patients received CPAP at 10 cm H2O during CPB. Group B (IMV) patients received IMV with a tidal volume of 2 cc/kg and respiratory rate of 15/min and group C (control) patients did not receive any type of ventilation during CPB. Other procedures were similar between groups. Arterial blood samples were taken at 8 moments and arterial blood gas (ABG) analysis were compared between groups. Chest x-rays after CABG were also evaluated with respect to atelectasis. Results: The demographic data were similar in between three groups. Graft number, pump time and preoperative ABGs were not significantly different. Postoperative PaO2 were significantly higher in the CPAP and IMV groups and (A-a) DO2 were significantly lower in these two groups, compared to the control group. Conclusions: In the present study, applying positive airway pressure methods (CPAP or IMV) during CPB was associated with better postoperative ABG measurements and (A-a) DO2.

Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded197    
    Comments [Add]    
    Cited by others 4    

Recommend this journal