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가상출혈에서 혈관내 용적 지표로서 호흡성 맥파전도시간 변이의 측정
전인구 ( In Gu Jun ),박종연 ( Jong Yeon Park ),상보현 ( Bo Hyun Sang ),박준영 ( Jun Young Park ),주자영 ( Ja Young Joo ),황규삼 ( Gyu Sam Hwang ) 대한마취과학회 2009 Korean Journal of Anesthesiology Vol.56 No.3
Background: We examined the usefulness of respiratory pulse transit time (PTT) variation as an intravascular volume index in young, healthy, spontaneous, paced breathing volunteers exposed to simulated central hypovolemia by lower body negative pressure (LBNP). Methods: With paced breathing at 0.25 Hz, beat-to-beat finger blood pressure (BP), heart rate (HR), cardiac output (CO), stroke volume (SV), total peripheral resistance (TPR), and PTT were measured non-invasively in 18 healthy volunteers. Graded central hypovolemia was generated using LBNP from 0 to -20, -30, -40, and -50 mmHg. Respiratory PTT variation (PTTV) was calculated as the difference of maximal and minimal values divided by their respective means. Respiratory-frequency PTT variability (PTTRF) using power spectral analysis was also estimated. Results: During LBNP, SV, CO and PTT(RF) decreased, but PTT, PTTV and TPR increased significantly. PTTV did not correlate with SV changes (r=-0.08, P=0.52), but PTT(RF) (r=0.58, P<0.01) and PTT (r=0.43, P<0.01) did during progressive hypovolemia. Conclusions: PTT(RF) is more applicable to the changes in intravascular volume than PTT and PTTV, suggesting spectral analysis of PTT might be used as a dynamic preload index in patients with spontaneous and paced breathing condition, which needs further studies. (Korean J Anesthesiol 2009; 56: 265~72)
증례보고 : Lesch-Nyhan 증후군 환자의 경피적 신쇄석술을 위한 전신마취 경험
전인구 ( In Gu Jun ),진지현 ( Ji Hyun Chin ),김영국 ( Young Kug Kim ),김영욱 ( Young Uk Kim ),조성강 ( Sung Kang Cho ),황규삼 ( Gyu Sam Hwang ),황재현 ( Jai Hyun Hwang ) 대한마취과학회 2007 Korean Journal of Anesthesiology Vol.53 No.4
Lesch-Nyhan syndrome (LNS) is a rare, X-linked recessive inherited disorder caused by a deficiency of the enzyme hypoxanthine-guanine-phophoribosyltransferase, leading to excessive purine production and elevation of uric acid. Clinical manifestations include mental retardation, spasticity, choreathetosis, compulsive self-mutilation, renal calculi followed by obstructive nephropathy, and arthritis. Patient with LNS may have increased risk of aspiration pneumonia, acute renal failure and unexpected sudden death. We accomplished successful general anesthesia in a case of LNS requiring percutaneous nephrolithotomy due to renal calculi. (Korean J Anesthesiol 2007; 53: 520~3)
실험연구 : 흰쥐의 수술 후 통증 모델에서 척수강 내로 투여한 Adenosine A1 수용체 작용제(R- PIA)의 모르핀 내성에 대한 효과
전인구 ( In Gu Jun ),박룡철 ( Long Zhe Piao ),권미영 ( Mi Young Kwon ),박종연 ( Jong Yeon Park ) 대한마취과학회 2007 Korean Journal of Anesthesiology Vol.52 No.2
Background: Analgesic tolerance to opioids has been described in both experimental and clinical conditions, which may limit their clinical utility. This study investigated the effects of intrathecal adenosine A1 receptor agonist (R-PIA) on spinal morphine tolerance. Methods: SD rats were given intrathecal injections of saline 10μl, R-PIA 10μg, morphine 10μg, or R-PIA plus morphine combinations for 7 days (R-PIA given for days 1-7; days 1-3; or days 5-7). Antiallodynic testing using von Frey filaments was carried out before and 30 minutes after the drug injection. On day 8, an antiallodynic dose-response curve was constructed and the 50% effective dose (ED50) for morphine (given alone) was calculated for each study group. Results: The coinjection group of R-PIA with morphine blocked the development of tolerance, as shown by the preservation of morphine antiallodynia over 7 days the concomitant decrease in the ED50 values on day 8, compared with the morphine-alone group. Although additive analgesia over days 1-7 cannot be ruled out, the reductions of the ED50 in the R-PIA and morphine combination group suggest some suppression of tolerance. Conclusions: These results suggest that intrathecal R-PIA prevents the development of spinal opioid tolerance. Future studies will be needed to examine the respective roles of supraspinal and peripheral sites of R-PIA and morphine interaction, and to investigate the mechanisms underlying the action of R-PIA on opioid tolerance. (Korean J Anesthesiol 2007; 52: 212~8)
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 : 경요도 방광종양 절제술을 위한 폐쇄신경 차단 도중에 발생한 예기치 못한 척추바늘의 분리
진지현 ( Ji Hyun Chin ),전인구 ( In Gu Jun ),김영국 ( Young Kug Kim ),강금내 ( Keum Nae Kang ),황규삼 ( Gyu Sam Hwang ),황재현 ( Jai Hyun Hwang ) 대한마취과학회 2007 Korean Journal of Anesthesiology Vol.53 No.2
Obturator nerve block is occasionally performed during transurethral resection of lateral bladder wall tumors to prevent the violent contraction of the adductor muscle of the thigh. Rare complications including intravascular injection of the local anesthetics and hematoma formation may occur during the obturator nerve block. We report a case of the unintentional breakage of the spinal needle during the obturator nerve block with successful removal of the broken spinal needle by an orthopedic surgeon. (Korean J Anesthesiol 2007; 53: 250~3)
임상연구 : 심박수 변이도, 혈압 변이도 및 압반사 민감도를 이용한 간경화 환자의 심혈관 자율신경계 평가
윤미옥 ( Mi Ok Youn ),강수진 ( Su Jin Kang ),전인구 ( In Gu Jun ),신원정 ( Won Jung Shin ),최병문 ( Byung Moon Choi ),도경준 ( Kyung Jun Do ),조선준 ( Sun Joon Cho ),최재혁 ( Jae Hyuk Choi ),송준걸 ( Jun Gol Song ),허인영 ( In You 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.50 No.6
Background: Liver cirrhosis is associated with several hemodynamic abnormalities, including an impairment of autonomic nervous system reflexes, but very few have compared the disease severity with cardiovascular autonomic dysfunction assessed by spectral analysis of blood pressure and electrocardiogram. The aim of this study was to investigate the relationship between Child-Turcotte-Pugh (CTP) score and autonomic indices in patients with liver cirrhosis using the heart rate variability (HRV), blood pressure variability (BPV) and baroreflex sensitivity (BRS). Methods: Fifty patients scheduled for liver transplantation recipients under general anesthesia were enrolled in the study. Beat-to-beat blood pressure and RR interval were measured for five minutes before anesthesia induction. HRV and BPV were estimated by power spectral analysis of RR interval and systolic blood pressure. BRS was estimated by both the sequence method (Sequence BRS) and high frequency (HF) gain of transfer function analysis (HF BRS). Results: Significant inverse correlations between CTP score and Sequence BRS (r = -0.61), HF BRS (r = -0.59), low frequency (LF) and HF power of HRV (r = -0.57, r = -0.46), LF power of BPV (r = -0.37) were found. However, no significant correlations were observed between CTP score and LF/HF ratio of HRV (r = -0.02) and HF power of BPV (r = 0.27). Conclusions: These results showed that autonomic dysfunction assessed by spectral analysis was associated with increasing severity of liver cirrhosis. Further study will be needed to clarify relationship between our findings and hemodynamic fluctuations during anesthesia for liver transplantation. (Korean J Anesthesiol 2006; 50: 655~62)