산소요법

강정완,Kang, Jeong-Wan 대한치과마취과학회 2008 Journal of Dental Anesthesia and Pain Medicine Vol.8 No.1

밀리미터파 통신 파티클 필터 기반 고속 빔 추적 기술

강정완(Kang Jeong Wan),좌혜경(Jwa Hye Kyung),김선우(Kim Sun Woo) 한국통신학회 2018 한국통신학회 학술대회논문집 Vol.2018 No.11

이동성을 고려한 밀리미터파 파티클 필터 기반 빔 추적

강정완(Jeong-wan Kang),김선우(Sun-woo Kim) 한국통신학회 2019 韓國通信學會論文誌 Vol.44 No.9

V2I 환경 파티클 필터 기반 MIMO 채널 빔 추적

강정완(Kang Jeong Wan),김선우(Kim Sun Woo) 한국통신학회 2019 한국통신학회 학술대회논문집 Vol.2019 No.1

외래 전신마취하 치과 장애인의 치과치료 및 보호자의 반응에 관한 조사 연구

박동석,최병재,강정완,이제호,Park, Dong-Suk,Choi, Byung-Jai,Kang, Jeong-Wan,Lee, Jae-Ho 대한소아치과학회 2003 大韓小兒齒科學會誌 Vol.30 No.1

Under this thesis, 235 patients with dental problems treated under general anesthesia at the Pediatric Dentistry Clinic of Yonsei Dental College were surveyed and their age distribution, reasons for taking general anesthesia, duration of anesthesia, duration of dental procedure, dental treatment peformed and complications were analyzed. A questionnaire survey was also conducted to analyze degrees of anxiety and satisfaction among their parents according to the parents' age, educational background and experience of general anesthesia, as well as the patients' age and past dental history. Following are the results. 1. When the patients were treated under general anesthesia, the degree of anxiety of their mothers was higher than that of their fathers. It appeared that the higher the parents' educational background was, the less their anxiety. 2. The higher the parents' educational level was, the higher the degree of satisfaction after treatment under general anesthesia. 95 cases (87.2%) responded that they would accept such treatment again, if needed. From the result, dental treatment under general anesthesia causes anxiety for parent but the parent's satisfaction level was high. And that was the way gives good quality of dental service to unmanagable patients. 연세대학교 치과대학병원에서 1997년 7월부터 2000년 7월까지 외래 전신마취하에 치과치료를 시행한 235명의 치과 장애인 환자를 대상으로 연령 분포, 전신마취 선택이유, 소요시간, 마취시간, 치료내용과 합병증 등을 분석하고, 우편 설문 조사에 응답한 109명을 대상으로 보호자의 연령과 교육정도, 보호자의 전신마취 경험 유무, 환자의 연령, 치과치료 경험의 유무 등에 따른 보호자의 불안정도와 만족도를 조사하여 다음과 같은 결과를 얻었다. 1. 아동의 전신마취시 보호자가 느끼는 불안정도는 아버지보다 어머니가 더 높았으며, 보호자의 학력이 높을수록 불안정도는 감소하는 경향을 보였다.(P<0.05) 2. 보호자의 학력이 높을수록 전신마취 치료의 만족도는 높았다.(P=0.05) 필요하다면 다시 전신마취하에 치과치료를 받겠냐는 설문에 95명(87.2%)이 받겠다고 응답하였다. 이상의 결과로 볼 때 외래 전신마취하의 치과치료는 환자 보호자에게 통상의 치과치료보다 불안을 야기하지만 치료에 대한 만족도는 높았으며 행동조절의 어려움으로 인해 치과 치료받기가 어려운 환자에게 양질의 치과 서비스를 제공할 수 있는 방안임을 알 수 있었다.

뇌성마비 환자에서 전신마취 후 나타난 호흡곤란 -증례보고-

민수영,이제호,강정완,Min, Soo-Young,Lee, Jae-Ho,Kang, Jeong-Wan 대한치과마취과학회 2011 Journal of Dental Anesthesia and Pain Medicine Vol.11 No.1

When patients with cerebral palsy are put under general anesthesia, there may be problems like difficult endotracheal intubation caused by deviation of respiratory tract due to scoliosis, hypotension related to chronic malnutrition and anemia, and failure of ventilation due to deformation of the thoracic cavity. The main clinical problem of postanesthetic complication is hypoxemia. The patients with cerebral palsy need close monitoring during treatment under general anesthesia and postanesthetic management. The purpose of this report is to evaluate a patient with cerebral palsy and mental retardation appeared to have dyspnea after general anesthesia.

선행적 진통 요법의 효과성에 대한 연구 -발치 전과 후 진통 요법의 효과 비교-

정영수,김문기,박형식,이의웅,강정완,Jung, Young-Soo,Kim, Moon-Key,Park, Hyung-Sik,Lee, Eui-Wung,Kang, Jeong-Wan 대한치과마취과학회 2003 Journal of Dental Anesthesia and Pain Medicine Vol.3 No.1

Background: Studies on the pain have been dealing with many different ways for last several centuries. Especially, preemptive analgesia is being used as a method to control the postoperative pain. Many studies on its efficacy have been processed in different ways about various drugs, administration methods and times for various operations. And the value of preemptive analgesia are still controversial regarding the results of other clinical studies. The authors performed a clinical study on efficacy of preemptive analgesia using an non-steroidal anti-inflammatory drug (NSAID) for the surgical extraction of impacted third molar teeth and present the more effective pain treatment after oral surgery with literature review. Methods: Using a randomized double blind test design, this study compared the analgesic efficacies of an NSAID, Talniflumate 370 mg. This drug administrated first either 1 hour preoperatively (experimental group) or when the pain developed moderately to severely over 5 scale of verbal rating scales (0-10) to respective 30 patients undergoing the removal of impacted third molars. Pain intensity and the time from the end of surgery were assessed postoperatively whenever the patients demanded additional drug over 5 scale for forty eight hours using same verbal rating scales. Results: The sex distribution, the age of the patients. and the time required for surgery in two groups were similar. The average first time for demanding additional drug after surgery was 163.9 minutes in experimental group and 191.5 minutes in control group. At this time, the average pain intensity was 5.8 in experimental group and 6.1 in control group. And the average second time for demanding additional drug was 365.5 minutes in experimental group and 351.8 minutes in control group. At this time. the average pain intensities were 6.6 in experimental group and 6.2 in control group. No statistically significant difference was found between the average first times and second times, and the average pain intensities at first and second times in two groups. Conclusions: From these results the efficacy of preemptive analgesia used in this study was not appeared. This clinical study indicates that many NSAIDs administrated preoperatively in present practices have weak efficacy of preemptive analgesia for postoperative pain, thus the authors recommend that only postoperative analgesics are adequate without preoperative use of analgesics.

악교정 수술시 유도저혈압 마취를 위해 사용되는 Esmolol과 Nitroglycerin의 효과에 대한 비교 연구

정영수(Young Soo Jeong),강정완(Jeong Wan Kang),박형식(Hyung Sik Park),이충국(Choong Kook Yi),이의웅,(Eui Woong Lee) 대한구강악안면외과학회 1998 대한구강악안면외과학회지 Vol.24 No.4

Induced hypotension is used to help control bleeding during procedures where surgical hemostasis is technically difficult to achieve. A mean arterial blood pressure(MABP) as low as 50-60 mmHg appears to be well tolerable in healthy patients. The present study was designed to compare the efficacy of Esmolol and Nitroglycerin as primary drug for hypotensive anesthesia during 22 cases of orthognathic surgery, and compare their effects on blood loss, duration of surgery, quality of the surgical field, hormonal response, and patient outcome. The results obtained are as follows. 1. During the induced hypotension, mean arterial blood pressure was similarly reduced in esmolol group and nitroglycerin group. And any significant difference was not seen in the time of inducing hypotension from starting the drug administration, preoperative mean blood pressure and mean blood pressure during the period of postoperative recovery. 2. Difficulty of the operation, quality of the surgical field and total operation time in 2 groups show no difference but the time during hypotension was significantly reduced in esmolol group. 3. Urine output, administered fluid volume, transfusion volume of autologous blood, preoperative and postoperative base excess, preoperative and postoperative hematocrit had no difference between 2 groups. 4. The change of the plasma renin activity was more lowered in esmolol group than in nitroglycerin group. Based on the above results, esmolol can replace the nitroglycerin as a new primary drug for hypotensive anesthesia. Especially, esmolol is more recommendable than nitroglycerin on the effect of stability in renin-angiotensin system and prevent rebound hypertension in posthypotensive period.

Point-based surface best fit 알고리즘을 이용한 디지털 치아 모형과 3차원 CT 영상의 중첩 정확도

김봉철,이채은,박원서,강정완,이충국,이상휘,Kim, Bong-Chul,Lee, Chae-Eun,Park, Won-Se,Kang, Jeong-Wan,Yi, Choong-Kook,Lee, Sang-Hwy 대한구강악안면외과학회 2008 대한구강악안면외과학회지 Vol.34 No.5

Purpose: The goal of this study was to develop a technique for creating a computerized composite maxillofacial-dental model, based on point-based surface best fit algorithm and to test its accuracy. The computerized composite maxillofacial-dental model was made by the three dimensional combination of a 3-dimensional (3D) computed tomography (CT) bone model with digital dental model. Materials and Methods: This integration procedure mainly consists of following steps : 1) a reconstruction of a virtual skull and digital dental model from CT and laser scanned dental model ; 2) an incorporation of dental model into virtual maxillofacial-dental model by point-based surface best fit algorithm; 3) an assessment of the accuracy of incorporation. To test this system, CTs and dental models from 3 volunteers with cranio-maxillofacial deformities were obtained. And the registration accuracy was determined by the root mean squared distance between the corresponding reference points in a set of 2 images. Results and Conclusions: Fusion error for the maxillofacial 3D CT model with the digital dental model ranged between 0.1 and 0.3 mm with mean of 0.2 mm. The range of errors were similar to those reported elsewhere with the fiducial markers. So this study confirmed the feasibility and accuracy of combining digital dental model and 3D CT maxillofacial model. And this technique seemed to be easier for us that its clinical applicability can good in the field of digital cranio-maxillofacial surgery.

비스테로이드성 항염진통제의 투여시기가 구강외과 술 후 통증에 미치는 효과에 대한 연구

정영수,김문기,엄유정,박형식,이의웅,강정완,Jung, Young-Soo,Kim, Moon-Key,Um, Yoo-Jung,Park, Hyung-Sik,Lee, Eui-Wung,Kang, Jeong-Wan 대한치과마취과학회 2004 Journal of Dental Anesthesia and Pain Medicine Vol.4 No.2

Background: Many studies on efficacy of preemptive analgesia have been processed in different ways. But the value of preemptive analgesia is still controversial. The goal of this study was to compare analgesic effect of an NSAID according to three different administration times for oral surgical pain. Patients and Methods: Using a randomized, parallel-group, single-center, and active-controlled test design, this study was conducted to healthy 80 patients undergoing a surgical removal of an impacted mandibular third molar requiring bone removal. The oral NSAID was first administered 1 hour preoperatively, or 1 hour postoperatively, or no scheduled administration in pre or postsurgery. Whenever patients felt at least moderate pain (score ${\ge}$ 5 on a 10-point scale) after surgery, they were instructed to take the same drug. Pain intensities and times to the first and second onset of postoperative pain from end of surgery were assessed for 24 hours. Results: Of the enrolled eighty subjects in this study, 25 patients were assigned to preemptive, 26 to post-treatment and 29 to no treatment group. The demographic distribution and duration of surgery in the three groups were statistically similar. The mean time to first onset of postoperative pain was significantly prolonged in post-treatment group (277.2 minutes, p < 0.05) compared to preemptive (158.4 minutes) and no treatment group (196.5 minutes). The mean time to second onset of postoperative pain was not significantly different among the three groups. No significant statistical difference was found among the mean pain intensities at the first and second onset of postoperative pain in the three groups. Conclusions: In this small selected group of subjects and limited study design, the analgesic effects of NSAID administered preoperatively were no longer effective for postoperative pain. The results in this population imply that scheduled postoperative analgesics before pain development are adequate for postoperative analgesia without preoperative administration.