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Relaxing intraoperative natural sound blunts haemodynamic change at the emergence from propofol general anaesthesia and increases the acceptability of anaesthesia to the patient

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Background: 

It is known that auditory input, such as comforting music or sound, blunts the human response to surgical stress in conscious patients under regional anaesthesia. As auditory perception has been demonstrated to remain active under general anaesthesia, playing comforting sounds to patients under general anaesthesia might also modulate the response of these patients to surgical stress. Methods: 

Fifty-nine patients scheduled for laparoscopic cholecystectomy were anaesthetized with propofol general anaesthesia in combination with epidural anaesthesia. Natural sounds, chosen preoperatively by each patient as being comforting, were played to 29 patients using headphones during surgery (S group) and the remainder of the patients (n = 30) were fitted with dummy open-type headphones (N group). We compared the haemodynamic change during anaesthesia and the acceptability of anaesthetic practice between the two groups in a randomized double-blind design. Results: 

There were no differences in haemodynamics between the S and N groups during surgery. During the emergence from anaesthesia, the mean blood pressure and heart rate gradually increased; both parameters were significantly higher in the N group than in the S group. Postoperatively, patients in the S group perceived the experience of anaesthesia as significantly more acceptable than did those in the N group. Conclusion: 

These findings indicate that allowing patients comforting background sounds during general anaesthesia may blunt haemodynamic changes upon emergence from general anaesthesia and increase the acceptability of the experience of anaesthesia.
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Keywords: Acceptability; emergence; haemodynamics; natural sound; propofol; psychological stress

Document Type: Research Article

Affiliations: 1: Department of Anaesthesiology and Intensive Care Medicine, Osaka City University Medical School, Abeno-Ku, Osaka, 2: Department of Anaesthesia, Tondabayashi Hospital, Tondabayashi, Osaka, 3: Department of Anaesthesia, Yodogawa Christian Hospital, Higashiyodogawa-ku, Osaka, Japan 4: Department of Biochemistry and Molecular Pathology and

Publication date: 2003-09-01

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