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차진욱 ( Jin Wook Cha ),곽상현 ( Sang Hyun Kwak ),김석재 ( Seok Jai Kim ),김창모 ( Chang Mo Kim ),정성태 ( Sung Tae Jeong ),배홍범 ( Hong Beom Bae ),유경연 ( Kyung Yeon Yoo ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.5
A tracheal bronchus is an aberrant, accessory or ectopic bronchus arising almost always from the right lateral wall of the trachea at the level less than 2 cm above the carina. An endotracheal or endobronchial tube can obstruct or migrate into a tracheal bronchus, resulting in pulmonary atelectasis, hypoxemia, or both during general anesthesia. We report two patients in whom the anomalous tracheal bronchus had been surgically resected under general anesthesia. The anomaly was identified before surgery in each patient and anesthesia was uneventful. (Korean J Anesthesiol 2006; 51: 638~40)
임상연구 : Propofol 마취 유도 후 후두경을 이용한 기관내 삽관시 나타나는 혈역학반응을 둔화하기 위한 Remifentanil의 적정용량
차진욱 ( Jin Wook Cha ),곽상현 ( Sang Hyun Kwak ),김석재 ( Seok Jai Kim ),최정일 ( Jeong Il Choi ),김창모 ( Chang Mo Kim ),정성태 ( Sung Tae Jeong ),유경연 ( Kyung Yeon Yoo ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.3
Background: A laryngoscopy and endotracheal intubation cause an increase in the blood pressure and heart rate. Remifentanil is an opioid that is often used to reduce the hemodynamic responses after tracheal intubation. This study evaluated the effect of three bolus doses of remifentanil on the hemodynamic responses to a laryngoscopy and tracheal intubation. Methods: Eighty patients, aged 35-65 years, with an ASA physical status of I and II were randomly divided into four groups containing 20 patients each. Anesthesia was induced with propofol 2 mg/kg followed 30 s later by saline (control) or remifentanil 0.5 (R0.5), 1 (R1) or 2 (R2) μg/kg given as a bolus over a 30 s period. A laryngoscopy and tracheal intubation were performed 90 s later (corresponding to 3 min after induction), and anesthesia was maintained using 2% sevoflurane and 50% nitrous oxide in oxygen. Rocuronium 1 mg/kg was given as a neuromuscular block. The systolic arterial blood pressure (SAP) and heart rate (HR) were recorded until 5 min after intubation. Results: In all groups, the SAP decreased after inducing anesthesia and then increased after intubation in all groups (P < 0.05), but the maximum increases (46, 15, and 9 mmHg in the R0.5, R1, and R2 groups, respectively) after intubation were lower in the remifentanil groups than that of the control group (73 mmHg) (P < 0.05). The HR decreased in the remifentanil groups while it remained stable in the controls after the induction of anesthesia. However, it increased after intubation in all groups. The mean maximum HR (83, 71, and 69 bpm in the R0.5, R1 and R2 groups, respectively) was significantly lower in the remifentanil groups than that in the controls (98 bpm) (P < 0.05). All remifentanil doses significantly attenuated the pressor and tachycardiac responses (P < 0.05). Conclusions: All remifentanil doses were effective in controlling the pressor and tachycardiac response to endotracheal intubation in patients in whom anesthesia was induced with propofol. However, the use of the 1 and 2μg/kg dose was associated with a decrease in the SAP to less than 85 mm Hg in 10 patients (50%) each. Therefore, 0.5μg/kg appears to be the optimal dose to attenuate the cardiovascular responses to endotracheal intubation in patients. (Korean J Anesthesiol 2006; 51: 292~6)
방사선불투과성 무기입자를 첨가한 교대배열 폴리비닐알코올 마이크로피브릴의 제조
조혜원(Hye Won Jo),차진욱(Jin Wook Cha),한성수(Sung Soo Han),이준석(Joon Seok Lee),오태환(Tae Hwan Oh) 한국고분자학회 2013 폴리머 Vol.37 No.5
폴리비닐알코올(poly(vinyl alcohol), PVA) 마이크로피브릴(microfibrils)을 금속 색전코일을 대체할 수 있는 고분자 색전코일에 적용하기 위해 벌크중합으로 폴리피발산비닐(poly(vinyl pivalate), PVPi)을 제조하고 비누화 공정에서 방사공정 없이 중합도가 1100 교대배열 다이애드(diad)기 함량 60.4%인 교대배열 PVA(syndiotactic PVA, s-PVA) 마이크로피브릴을 제조하였다. 또한 별도의 조영제의 투여가 불필요한 마이크로피브릴 제조를 위해 방사선불투과성 물질인 이산화지르코늄과 황산바륨을 비누화 공정에서 첨가하여 방사성불투과성 교대배열 PVA 마이크로피브릴을 제조하였고, 무기입자 함유 s-PVA 마이크로피브릴의 computed tomography(CT) value 값 측정 결과 이산화지르코늄의 함량이 12 wt% 이상에서, 황산바륨은 6 wt% 이상에서 1000 이상의 우수한 방사선불투과성을 나타내는 것을 확인하였다. Poly(vinyl pivalate) (PVPi) was bulk polymerized to make poly(vinyl alcohol) (PVA) microfibrils to apply for polymeric embolization coils replacing metalic coils. Then, syndiotactic PVA (s-PVA) microfibrils having number-average degree of polymerization of 1100 and s-diad content of 60.4% were prepared via saponification of the PVPi with no separate spinning process. To make s-PVA microfibrils with radiopacity, zirconium dioxide (ZrO2) and barium sulfate (BaSO4) were added into s-PVA microfibrils during saponification. The computed tomography (CT) value indicating radiopacity reached up to over 1000 when the amount of ZrO2 and BaSO4 were 12 and 6 wt%, respectively.