ISSN : 1301-5680
e-ISSN : 2149-8156
Turkish Journal of Thoracic and Cardiovascular Surgery     
Evaluation of pain scoring and free cortisol levels of postoperative analgesic methods in cardiac surgery: A new perspective
Özgür Özmen1, Fatih Özçelik2, Mehmet Ali Kaygın3, Habip Yılmaz2, Muhammet Ahmet Karakaya4
1Department of Anesthesiology and Reanimation, Medicine Faculty of Atatürk University, Erzurum, Turkey
2Department of Clinical Biochemistry, University of Health Sciences, Sultan Abdulhamid Han Training and Research Hospital, Istanbul, Turkey
3Department of Cardiovascular Surgery, University of Health Sciences, Erzurum Regional Training and Research Hospital, Erzurum, Turkey
4Department of Anesthesiology and Reanimation, Medipol University Faculty of Medicine, Istanbul, Turkey
DOI : 10.5606/tgkdc.dergisi.2019.15143
Background: This study aims to evaluate the most appropriate analgesic method of minimizing postoperative pain to prevent complications in patients scheduled for cardiac surgery.

Methods: Between January 2016 and June 2016, a total of 60 patients with the American Society of Anesthesiologists Physical Status Class III (27 males, 33 females; mean age 63 years; range, 49 to 77 years) with an ejection fraction of above 50% who underwent elective coronary artery bypass grafting were included. The patients were divided into two groups following admission to the intensive care unit. Group 1 (n=30) was administered intravenous fentanyl citrate with patient-controlled analgesia protocol, while Group 2 (n=30) was administered 0.1% bupivacaine hydrochloride analgesia protocol with catheter placed between the sternum and subcutaneous tissue.

Results: In Group 1, pain intensity scores at two h and visual analog scale scores except at 24, 36, and 48 h were higher than Group 2 (p<0.05). The length of intensive care unit stay and urine cortisol levels were higher in Group 1 than Group 2 (78±12 h and 631±505 ?g at 24 h vs. 66±13 h and 401±297 ?g at 24 h, respectively p<0.05). Partial pressure of oxygen levels at 10 and 16 h during the postoperative intensive care unit stay were lower, while partial pressure of carbon dioxide levels at 24 h was higher in Group 1 than Group 2 (p<0.05).

Conclusion: The bupivacaine protocol is a relatively more useful analgesic method which produces improved results in blood gas analysis by reducing the effects of pain and shortens the length of intensive care unit stay. Low levels of free cortisol also confirm this finding.

Keywords : Bupivacaine, intensive care unit, length of stay, patient-controlled analgesia protocol, urine cortisol
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