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중화상 환자에서 근이완제 투여 없이 Propofol과 여러 용량의 Remifentanil을 이용한 기관내삽관 환경평가
배지영 ( Ji Young Bae ),곽태용 ( Tae Yong Kwak ),김종원 ( Jong Won Kim ),우철호 ( Chul Ho Woo ),김광민 ( Kwang Min Kim ) 대한마취과학회 2009 Korean Journal of Anesthesiology Vol.57 No.1
Background: Severe burn patients often have a difficult airway. Tracheal intubation can be conducted safely in patients in a stable hemodynamic condition using a propofol in conjunction with remifentanil without employing muscle relaxant. However, no studies have been conducted to date to evaluate intubation of severe burn patients. Therefore, this study was conducted to evaluate the condition of tracheal intubation with propofol and varying doses of remifentanil without muscle relaxants in severe burn patients. Methods: Eighty severe burn patients were divided into four groups at random. Anesthesia was intravenously induced by continuous infusion of propofol (4 μg/ml of effect site concentration)and slowly injected remifentanil. Groups 1, 2, 3, and 4 received 1, 1.5, 2, and 2.5 μg/kg of remifentanil, respectively. Ninety seconds after the administration of remifentanil, tracheal intubation was attempted. We used a scoring system in which jaw relaxation, the state when laryngoscopy was inserted, vocal cord opening, cough, limb movement, and difficulty with laryngoscopy were divided into ≤2 (acceptable) or ≥3 (not acceptable). In addition, the hemodynamic changes were measured at baseline, before intubation, and 1, 2, 3, 4, and 5 min after intubation. Results: Clinically acceptable intubating conditions were observed in 35%, 40%, 55%, and 70% of the patients in groups 1-4, respectively. The mean arterial pressure and heart rate decreased immediately before intubation in all groups. One patient was treated for bradycardia however, no patients manifested hypotension. Conclusions: Propofol and slowly injected remifentanil (2.5 μg/kg) without muscle relaxant can provide clinically acceptable intubating conditions and stable hemodynamic conditions in major burn patients. However, further studies should be conducted to evaluate the effects of increased doses of remifentanil. (Korean J Anesthesiol 2009; 57: 26~31)
박석호,조성찬,최덕규,김충길,김진영,곽태용 한국농업기계학회 2005 바이오시스템공학 Vol.30 No.3
Vegetable transplanting operation has been wholly depended on human labor that needs 18.4 hrs per 10 acres in Korea. Since periods of vegetable transplanting operations are limited, their mechanization has been strongly demanded. This study was conducted to develop a transplanting device that was the core technology for vegetable transplanter. In order to find out transplanting track and velocity of transplanting device, a kinematic analysis software was employed. Evaluation of prototype was carried out in the circular soil bin with high speed camera. Rotary type transplanting device produced an elliptic loci when two links of different lengths were moving to the opposite direction. The length of two links was 75 mm and 44 mm, respectively. Maximum displacement of rotary type transplanting device was 238 mm. It seemed that the transplanting elliptic loci of transplanting device were identical between the simulation output generated by kinematic analysis software and the circular soil bin test result with a high speed camera. The rotary type transplanting device can be suitable for transplanting short height vegetable, less than 20 cm length vegetables such as Chinese cabbage and cabbage, etc.