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Cement leakage into subcutaneous tissue after kyphoplasty -A case report-
송준걸,신은영,김두환,임정길,김영기,신진우,이청 대한마취통증의학회 2009 Anesthesia and pain medicine Vol.4 No.4
We describe a case of cement leakage from the pedicle of vertebrae to the subcutaneous tissue after kyphoplasty. We attempted to remove all cement leakage, but residual cement remained in the paraspinal tissue without any neurological complications. This case illustrates the importance of the right timing of cement injection and when to detach the bone-filler device from the cement.
Wearable charge-trap flash memory electronic devices based on carbon nanotube
송준걸,김대형 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
Such wearable electronics require stable operation with high performance and robustness during various deformations induced by human motions. The key features for wearable electronic devices consist of soft, flexible and stretchable materials with specific designs to avoid the mechanical mismatch between human body and devices. Here, we present materials and advanced design strategies for the core elements of wearable electronics, such as transistors, charge-trap floating-gate memory units, and various logic gates in the stretchable configuration. The use of semiconducting carbon nanotube networks integrated with charge traps and ultrathin dielectric layers demonstrate consistent electrical characteristics as well as the enhancement of the deformability using the serpentine interconnections and neutral mechanical plane. Repetitive stretching tests and studies of mechanics corroborate the validity of the reliable operations for skin-based systems.
증례보고 : 중뇌동맥 경색증 환자의 마취유도 직후 경식도 심초음파에 의해 진단된 좌심방 혈전 -증례보고-
송준걸 ( Jun Gol Song ),황규삼 ( Gyu Sam Hwang ),김영국 ( Young Kug Kim ),성승혜 ( Seung Hye Sung ),최인철 ( In Cheol Choi ),황재현 ( Jai Hyun Hwang ),조성강 ( Sung Kang Cho ),한성민 ( Sung Min Han ) 대한마취과학회 2007 Korean Journal of Anesthesiology Vol.52 No.6
Stroke is one of the most common causes of death; in particular, cardiac source of embolism may be responsible for 15-20% of ischemic strokes. Here we report a case of left atrial thrombus diagnosed by transesophageal echocardiography (TEE) immediately after induction of general anesthesia in a patient with infarction of the middle cerebral artery. In this case, an emergent craniectomy was cancelled and medical treatment was performed. This case report shows that TEE taken in the operating room may play an important role in the change of treatment plan in a patient displaying acute mental change. (Korean J Anesthesiol 2007; 52: 702~6)
하이브리드 DCT 차량의 성능 시뮬레이션과 동력단절 해석
송준걸(Jungeol Song),박상준(Sangjoon Park),류완식(Wansik Ryu),오경철(Kyoungcheol Oh),김현수(Hyunsoo Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper presents shifting characteristics for a parallel hybrid electric vehicle with dual clutch transmission(DCT). In order to analyze the shifting characteristics, a HEV DCT simulator is developed. Using the simulator, shifting performance such as clutch torque, motor torque and acceleration are investigated. It is found that when the synchronizer that is connected to the motor comes out of the synchronized states to 4th and 6th gear phase, torque interruption occurs. The torque interruption should be minimized by precise motor and clutch control for improved shift quality, which requires future work.
임상연구 : Ketamine 마취유도가 압반사의 심박수 조절에 미치는 영향
송준걸 ( Jun Gol Song ),신원정 ( Won Jung Shin ),전인구 ( In Gu Jun ),강수진 ( Su Jin Kang ),최병문 ( Byung Moon Choi ),윤미옥 ( Mi Ok Youn ),김태희 ( Tae Hee Kim ),김영국 ( Young Kug Kim ),허인영 ( In Young Huh ),강성식 ( Seong S 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.5
Background: It is reported that ketamine increases central sympathetic activity as well as catecholamine reuptake inhibition. However, little has been known about baroreflex control of heart rate in ketamine anesthetized humans. Thus, the aim of this study was to analyze the effect of ketamine on spontaneous baroreflex sensitivity (BRS) during ketamine induction of anesthesia. Methods: Beat-by-beat arterial blood pressure and electrocardiogram at 5 min before and 10 min after ketamine administration (2 mg/kg) were recorded in twenty healthy living liver transplant donors. Spontaneous BRS was assessed by sequence method and transfer function analysis method. Results: Spontaneous BRS assessed by sequence method, BRSsequence, decreased from 13.7 ± 6.3 to 7.8 ± 4.5 ms/mmHg (P < 0.001). Spontaneous BRS assessed by low frequency transfer function method decreased from 10.9 ± 5.4 to 7.0 ± 4.1 ms/mmHg and by high frequency transfer function method from 14.8 ± 9.2 to 8.7 ± 8.8 ms/mmHg, respectively (P < 0.05). Conclusions: The spontaneous BRS was decreased during ketamine induction of general anesthesia. These results suggest that anesthesia induction with ketamine impairs baroreflex control of heart rate, which may provoke hemodynamic instability. (Korean J Anesthesiol 2006; 51: 528~34)
증례보고 : 경요도전립선절제술 중 발생한 방광천공에 의한 경요도절제후증후군
송준걸 ( Jun Gol Song ),김영국 ( Young Kug Kim ),김영욱 ( Young Uk Kim ),서형석 ( Hyung Seok Seo ),강금내 ( Kum Nae Kang ),황규삼 ( Gyu Sam Hwang ),황재현 ( Jai Hyun Hwang ) 대한마취과학회 2007 Korean Journal of Anesthesiology Vol.53 No.2
A transurethral resection of the prostate (TURP) is often performed to treat benign prostatic hypertrophy or prostatic carcinoma. Transurethral resection syndrome (TURS) is a rare but serious complication of TURP that has two different causes: (1) intravascular absorption of the irrigation fluid through the open prostatic venous sinus (TURP syndrome); and (2) intraperitoneal extravasation of the irrigation fluid through perforation of the bladder. In general, a laparotomy, repair of injury, or conservative approach such as bladder drainage, percutaneous drainage of the abdomen combined with medical treatment are performed to manage TURS attributed to the latter mechanism. We report a patient with TURS, who showed a gradual onset of hyponatremia after bladder perforation and intraperitoneal extravasation of the irrigation fluid, and was treated successfully using a conservative approach. (Korean J Anesthesiol 2007; 53: 254~8)