The Effect of Cardiopulmonary Pump on Hearing Loss after Cardiopulmonary Bypass Graft

Document Type : Research Paper

Authors

1 Associate professor of anesthesiology Mashhad University of medical sciences,Mashhad, Iran

2 Assistant professor of otolaryngology,Mashhad University of medical sciences,Mashhad, Iran

3 Anesthesiologist, Birjand University of medical sciences,Birjand, Iran

4 Associate professor of cardiosurgery,Mashhad University of medical sciences,Mashhad, Iran

5 surgeon,Yazd University of medical sciences,Yazd, Iran

6 cardio surgeon, Mashhad University of medical sciences,Mashhad, Iran

Abstract

Introduction
 
Coronary artery bypass graft is one of the most common surgeries in hospitals. Almost 50% of patients have complications. One of these complications is hearing loss.
Materials and Methods
Coronary artery bypasses grafting patients having inclusion criteria participated. One day before surgery, One day after surgery and if patients had hearing loss, the next week otoacoustic emission test was done. Patients were divided in to two groups: on pump and off pump bypass surgeries.
Results
Hearing loss occurred in 12%. Hearing loss in on-pump patients was 14.3% and in off-pump was 6/7% (p=0.09). The relation of preoperative OAE test and final OAE was tested and it was significant (p<0.005). In male patients, hearing loss in on-pump operation was 18/6% (p=0.002) and in females in on-pump operation was 7/4% and in off-pump operation was 18.2 %( p=0.1). Hearing loss occurred in 4/2% in 1500, 2000 HZ; 12/5% in 2500, 3000 HZ and 83/3% in 3500, 4000 HZ.
Conclusion
It after coronary artery bypass graft is rather Frequents (12%) and is more common in on-pump surgery, and occurs in high frequency. hearing loss is more common in male patients.

Keywords

References

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medical journal of mashhad university of medical sciences
Volume 54, Issue 1 - Serial Number 1
March and April 2010
Pages 50-57

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