| Changes in Angular Deviations under General Anesthesia for Strabismus Surgery with Objective Anesthetic Depth Control. |
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Chang Zoo Kim, Ki Yup Nam, Seung Uk Lee, Sang Joon Lee |
1Department of Ophthalmology, Kosin University College of Medicine, Busan, Korea. hhiatus@gmail.com
2Instutute for Medicine, Kosin University College of Medicine, Busan, Korea. |
| 객관적인 마취심도 조절하에서 전신마취 및 수술 전⋅후 사시각의 변화 |
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김창주1⋅남기엽1⋅이승욱1⋅이상준1,2 |
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고신대학교 의과대학 안과학교실1, 고신대학교 의과대학 의과학연구소2 |
Correspondence:
Sang Joon Lee,
Email: hhiatus@gmail.com
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Received: 17 May 2018 • Revised: 26 June 2018 • Accepted: 22 August 2018 |
| Abstract |
PURPOSE
Changes in angular deviation before and after general anesthesia and strabismus surgery were examined. METHODS: Twenty patients with intermittent exotropia who were operated on by the same surgeon from January 2014 to October 2017 were included. The basic angle of deviation (preoperative angle of deviation, PreAn) was measured at an outpatient clinic. While lying on a surgical bed under general anesthesia, the bispectral index was referenced, and it was confirmed that there was a sufficient degree of sedation. Photographs were then taken at a height of 40 cm (angle of deviation under general anesthesia, PostAn); while still under general anesthesia, the same procedure was followed immediately after the end of surgery. At 6 months after surgery, the angle of deviation was measured. RESULTS: There were 10 males and 10 females, and the mean age was 7.31 ± 3.59 years. The preoperative angle of deviation was 30.0 ± 13.87 prism diopters (PD) at far fixation; under general anesthesia, 26.46 ± 5.39 PD. There was a significantly positive correlation between the PreAn and angle of deviation under general anesthesia (PostAn - PreAn = −7.67 × PreAn + 19.57; R2 = 0.872; p < 0.00). The angle of deviation changes between pre- and post-anesthesia (PostAn-PreAn) and at the end point of surgery (OP end) and at 6 months after surgery (6mon) also showed a significantly positive correlation (6mon-OP end = 0.317 × [PostAn - PreAn] + 13.098; R2 = 0.334; p = 0.01). CONCLUSIONS: There was a significant positive correlation between the measured angle of deviation pre- and post-anesthesia. We could estimate the degree of change between the angle of deviation immediately after surgery and the stable angle according to the degree of deviation before and after general anesthesia. |
| Key Words:
Angle of deviation;Exotropia;General anesthesia |
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