Çi̇ğdem AKYOL BEYOĞLU, Ceylan SAYGILI, Mustafa DILEK, Guniz Meyanci KOKSAL

Investigation of the Association between Bispectral index and Body Temperature during Abdominal Surgery; An Observational Study

Objective: Bispectral index (BIS) is mainly used for drug titration and is well correlated with drug concentration and hypnosis. Our aim was to present the correlation between hypothermia and BIS during abdominal surgery. Methods: The study was conducted in patients with American Society of Anesthesiologists (ASA) score I-III, aged between 18-60 y, who had undergone abdominal operation in general surgery theatre. Body temperature and BIS scores whenawake, after anesthesia induction, after tracheal intubation and every 5 minutes during the operation, and afterextubation were measured and recorded.Results: Three hundred patients were included to the study. Repeated measure regression analysis of BIS scores with the body temperature at distinct time points did not show a significant relationship. None of the patients had a body temperature lower than 35°C. Conclusions: As a result of our study, we can say that temperature decrease up to 35°C may not have an effect on BIS scores, and BIS maybe used safely to indicate hypnosis level at temperatures 35°C and above during abdominal surgery.

Batın Cerrahisinde Bispektral indeks ve Vücut Sıcaklığı arasındaki İlişkinin Araştırılması; Gözlemsel Çalışma

Amaç: Bispektral indeks’in (BIS) ilaç konstantrasyonları ve hipnoz ile olan ilişkisi dolayısıyla ilaç titrasyonu için sıklıkla kullanılmaktadır. Amacımız; batın cerrahisinde BIS ile hipotermi arasında bir ilişki olup olmadığını araştırmaktı. Yöntemler: Çalışma, Amerikan Anestezi Derneği Skoru (ASA) I-III arasında olan, 18-60 yaş arası batın cerrahisi geçiren hastalarda yapıldı. Hastaların vücut sıcaklığı ve BIS skoru uyanık iken, anestezi indüksiyonu sonrası, trakeal entübasyon sonrası ve entübasyondan sonra her 5 dakikada bir olmak üzere ölçüldü ve kaydedildi. Bulgular: Çalışmaya 300 hasta dahil edildi. Regresyon analizinde BIS ve vücut sıcaklığı arasında anlamlı bir ilişki saptanamadı. Çalışmadaki hiçbir hastanın vücut sıcaklığı 35°C’nin altında ölçülmedi. Sonuç: Sonuç olarak batın cerrahisinde 35°C’nin üzerindeki vücut sıcaklıklarında BIS, anestezi derinliğini güvenilir bir biçimde gösterebilir.

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