28 results on '"Yong Kyung Lee"'
Search Results
2. Effects of nefopam on catheter-related bladder discomfort in patients undergoing ureteroscopic litholapaxy
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Jin Hyub Paek, Jin A Kim, Hyung Rae Cho, Seon Hwan Kim, Yong Woo Cheon, Yong Kyung Lee, and Jin Hye Min
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Complications ,medicine.medical_treatment ,Analgesic ,Urinary catheterization ,lcsh:RD78.3-87.3 ,03 medical and health sciences ,0302 clinical medicine ,Nefopam ,030202 anesthesiology ,Ureteroscopy ,Medicine ,Saline ,Clinical Research Article ,medicine.diagnostic_test ,business.industry ,Pethidine ,Catheter ,Anesthesiology and Pain Medicine ,lcsh:Anesthesiology ,Concomitant ,Anesthesia ,business ,030217 neurology & neurosurgery ,medicine.drug - Abstract
Background Patients who undergo urinary catheterization may experience postoperative catheter-related bladder discomfort (CRBD). Previous studies have indicated that drugs with antimuscarinic effects could reduce the incidence and severity of CRBD. Accordingly, this study was carried out to investigate whether nefopam, a centrally acting analgesic with concomitant antimuscarinic effect, reduces the incidence and severity of CRBD. Methods Sixty patients with American Society of Anesthesiologists physical status I and II and aged 18–70 years who were scheduled to undergo elective ureteroscopic litholapaxy participated in this double-blinded study. Patients were divided into control and nefopam groups, comprising 30 patients each. In the nefopam group, 40 mg nefopam in 100 ml of 0.9% saline was administered intravenously. In the control group, only 100 ml of 0.9% saline was administered. All patients had a urethral catheter and ureter stent inserted during surgery. The incidence and severity of CRBD, numerical rating scale (NRS) score of postoperative pain, rescue pethidine dose, and side effects were recorded in the post-anesthesia care unit after surgery. Results The incidence (P = 0.020) and severity (P < 0.001) of CRBD were significantly different between the control group and the nefopam group. The NRS score of postoperative pain (P = 0.006) and rescue dose of pethidine (P < 0.001) were significantly higher in the control group than in the nefopam group. Conclusions Intravenous administration of nefopam in patients scheduled to undergo ureteroscopic litholapaxy reduced the incidence and severity of CRBD, NRS score of postoperative pain and analgesic requirements.
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- 2018
3. Effects of warmed carrier fluid on nefopam injection-induced pain
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Jin Hye Min, Yong Kyung Lee, Hyung Rae Cho, Jin A Kim, and Seon Hwan Kim
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Nausea ,medicine.medical_treatment ,Analgesic ,Pain ,Heating ,03 medical and health sciences ,0302 clinical medicine ,Nefopam ,030202 anesthesiology ,Heart rate ,medicine ,Adverse effect ,Saline ,business.industry ,Cold temperature ,Fluid warmer ,Vasodilation ,Anesthesiology and Pain Medicine ,Vasoconstriction ,Anesthesia ,Vomiting ,Original Article ,medicine.symptom ,business ,030217 neurology & neurosurgery ,medicine.drug - Abstract
Background: Nefopam is a non-opioid, non-steroidal analgesic drug with fewer adverse effects than narcotic analgesics and nonsteroidal anti-inflammatory drugs, and is widely used for postoperative pain control. Because nefopam sometimes causes side effects such as nausea, vomiting, somnolence, hyperhidrosis and injection-related pain, manufacturers are advised to infuse it slowly, over a duration of 15 minutes. Nevertheless, pain at the injection site is very common. Therefore, we investigated the effect of warmed carrier fluid on nefopam injection-induced pain. Methods: A total of 48 patients were randomly selected and allocated to either a control or a warming group. Warming was performed by diluting 40 mg of nefopam in 100 ml of normal saline heated to 31-32°C using two fluid warmers. The control group was administered 40 mg of nefopam dissolved in 100 ml of normal saline stored at room temperature (21-22°C) through the fluid warmers, but the fluid warmers were not activated. Results: The pain intensity was lower in the warming group than in the control group (P < 0.001). The pain severity and tolerance measurements also showed statistically significant differences between groups (P < 0.001). In the analysis of vital signs before and after the injection, the mean blood pressure after the injection differed significantly between the groups (P = 0.005), but the heart rate did not. The incidence of hypertension also showed a significant difference between groups (P = 0.017). Conclusions: Use of warmed carrier fluid for nefopam injection decreased injection-induced pain compared to mildly cool carrier fluid. (Korean J Pain 2018; 31: 102-8)
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- 2018
4. Suspicious psychogenic hiccup after interventional pain procedures −A case report−
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Young Keun Chae, Yong Kyung Lee, Hong Sik Lee, Jinhye Min, Yoo Kang, and Ui-jin Je
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medicine.medical_specialty ,business.industry ,Psychogenic aspects ,General surgery ,medicine ,Psychogenic disease ,General Medicine ,medicine.symptom ,business ,Hiccups - Published
- 2015
5. Tracheal injury as a perforation of a newly formed tracheal diverticulum after tracheal intubation ?A case report?
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Jinhye Min, Hong Sik Lee, Yoo Kang, Sang Eun Lee, Young Keun Chae, and Yong Kyung Lee
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medicine.medical_specialty ,business.industry ,Tracheal diverticulum ,medicine.medical_treatment ,Perforation (oil well) ,Tracheal intubation ,General Medicine ,medicine.disease ,Surgery ,Anesthesia ,medicine ,Intubation ,Pneumomediastinum ,medicine.symptom ,Airway ,business ,Subcutaneous emphysema ,Diverticulum - Published
- 2015
6. The correlation between the Trendelenburg position and the stroke volume variation
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Young Keun Chae, Yong Kyung Lee, Hong Sik Lee, Yoo Kang, Ui Jin Je, Jin Hye Min, and Sang Eun Lee
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Mechanical ventilation ,Clinical Research Article ,Supine position ,Respiratory rate ,business.industry ,medicine.medical_treatment ,Trendelenburg position ,Trendelenburg ,stroke volume variation ,Stroke volume ,Operating table ,reverse trendelenburg position ,fluid therapy ,lcsh:RD78.3-87.3 ,Anesthesiology and Pain Medicine ,lcsh:Anesthesiology ,Anesthesia ,medicine ,business ,trendelenburg position ,Tidal volume - Abstract
Background The stroke volume variation (SVV), based on lung-heart interaction during mechanical ventilation, is a useful dynamic parameter for fluid responsiveness. However, it is affected by many factors. The aim of this study was to evaluate the effects of SVV on Trendelenburg (T) and reverse Trendelenburg (RT) position and to further elaborate on the patterns of the SVV with position. Methods Forty-two patients undergoing elective surgery were enrolled in this study. Fifteen minutes after standardized induction of anesthesia with propofol, fentanyl, and rocuronium with volume controlled ventilation (tidal volume of 8 ml/kg of ideal body weight, inspiration : expiration ratio of 1 : 2, and respiratory rate of 10-13 breaths/min), the patients underwent posture changes as follows: supine, T position at slopes of operating table of -5°, -10°, and -15°, and RT position at slopes of operating table of 5°, 10°, and 15°. At each point, SVV, cardiac output (CO), peak airway pressure (PAP), mean blood pressure, and heart rate (HR) were recorded. Results The SVV was significant decreased with decreased slopes of operating table in T position, and increased with increased slopes of operating table in RT position (P = 0.000). Schematically, it was increased by 1% when the slope of operating table was increased by 5°. But, the CO and PAP were significant increased with decreased slopes of operating table in T position, and decreased with increased slopes of operating table in RT position (P = 0.045, 0.027). Conclusions SVV is subjected to the posture, and we should take these findings into account on reading SVV for fluid therapy.
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- 2014
7. The Effects of Postoperative Brachial Plexus Block Using MgSO4 on the Postoperative Pain after Upper Extremity Surgery
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So Woon Ahn, Young Shin Kim, Yong Ho Kim, Young Soon Choi, Aerena Lee, Yong Kyung Lee, Young Keun Chae, Jin Hye Min, and In Gyu Choi
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medicine.medical_specialty ,brachial plexus ,Ropivacaine ,Nausea ,business.industry ,Visual analogue scale ,Patient-controlled analgesia ,medicine.medical_treatment ,Postoperative pain ,analgesia ,Surgery ,Anesthesiology and Pain Medicine ,magnesium sulfate ,Anesthesia ,medicine ,upper extremity ,Original Article ,medicine.symptom ,business ,Saline ,Brachial plexus ,medicine.drug ,Brachial plexus block - Abstract
Background: Although a brachial plexus block can be used to provide anesthesia and analgesia for upper extremity surgery, its effects using MgSO4 on postoperative pain management have not been reported. The aim of this study was to evaluate brachial plexus block using MgSO4 on postoperative analgesia. Methods: Thirty-eight patients who were scheduled to undergo upper extremity surgery were randomly allocated into two groups: patients receiving axillary brachial plexus block with 0.2% ropivacaine 20 ml and normal saline 2 ml (group S) or 0.2% ropivacaine 20 ml and MgSO4 200 mg (group M). Before extubation, the blocks were done and patient controlled analgesia was started, and then, the patients were transported to a postanesthetic care unit. The postoperative visual analogue scale (VAS), opioid consumption, and side effects were recorded. Results: The two groups were similar regarding the demographic variables and the duration of the surgery. No differences in VAS scores were observed between the two groups. There was no statistically significant difference in opioid consumption between the two groups. Nausea was observed in three patients for each group. Conclusions: Axillary brachial plexus block using MgSO4 did not reduce the level of postoperative pain and opioid consumption. (Korean J Pain 2011; 24: 158-163)
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- 2011
8. The effect of milrinone infusion on right ventricular function during coronary anastomosis and early outcomes in patients undergoing off-pump coronary artery bypass surgery
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Jin Hye Min, Woo Kyung Lee, Yong Ho Kim, In Gyu Choi, Hyong Rae Jo, Yong Kyung Lee, Young Keun Chae, and Young Sin Kim
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milrinone ,Clinical Research Article ,medicine.medical_specialty ,Cardiac output ,business.industry ,medicine.medical_treatment ,Cardiac index ,Anterior Descending Coronary Artery ,Anastomosis ,Surgery ,right ventricular function ,lcsh:RD78.3-87.3 ,Coronary artery bypass surgery ,Anesthesiology and Pain Medicine ,lcsh:Anesthesiology ,Internal medicine ,Right coronary artery ,medicine.artery ,medicine ,Cardiology ,Milrinone ,off-pump coronary artery bypass ,business ,medicine.drug ,Off-pump coronary artery bypass - Abstract
Background During coronary anastomosis in off-pump coronary artery bypass surgery (OPCAB), hemodynamic alternations can be induced by impaired diastolic function of the right ventricle. This study was designed to examine the effect of milrinone on right ventricular function and early outcomes in patients undergoing OPCAB. Methods Forty patients undergoing OPCAB were randomly assigned in a double-blind manner to receive either milrinone (milrinone group, n = 20) or normal saline (control group, n = 20). Hemodynamic variables were measured after pericardiotomy (T1), 5 min after stabilizer application for anastomosis of the left anterior descending coronary artery (LAD, T2), the obtuse marginalis branch (OM, T3), the right coronary artery (RCA, T4), 5 min after sternal closure (T5), and after ICU arrival. The right ventricular ejection fraction (RVEF) and right ventricular volumetric parameters were also measured using the thermodilution technique. For evaluation of early outcomes, the 30-day operative mortality and morbidity risk models were used. Results There was no significant difference in hemodynamic variables, including mean arterial pressure, between the 2 groups, except for the cardiac index and RVEF. The cardiac index and RVEF were significantly greater at T3 in the milrinone group than in the control group. Conclusions Continuous infusion of milrinone demonstrated a beneficial effect on cardiac output and right ventricular function in patients undergoing OPCAB, especially during anastomosis of the graft to the OM artery, and it had no adverse effect on early outcomes.
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- 2010
9. Traumatic Tricuspid Regurgitation Following Cardiac Massage
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Sungwon Na, Sang Beom Nam, Yong Kyung Lee, Young Jun Oh, and Young Lan Kwak
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Male ,medicine.medical_specialty ,medicine.medical_treatment ,Case Report ,Tricuspid Regurgitation ,Regurgitation (circulation) ,Heart Massage ,Cardiac Massage ,law.invention ,Avulsion ,Coronary artery bypass surgery ,Tricuspid Valve Insufficiency ,law ,Internal medicine ,medicine ,Cardiopulmonary bypass ,Humans ,Cardiopulmonary resuscitation ,Papillary muscle ,Aged ,business.industry ,General Medicine ,Intensive care unit ,Surgery ,medicine.anatomical_structure ,Cardiology ,cardiovascular system ,Transesophageal Echocardiography ,business ,Off-pump Coronary Artery Bypass Surgery - Abstract
We report a 66-yr-old male patient who developed tricuspid regurgitation secondary to internal cardiac massage. After uneventful off-pump coronary artery bypass surgery, the subject experienced cardiac arrest in the intensive care unit. External cardiac massage was initiated and internal cardiac massage was performed eventually. A transesophageal echocardiography revealed avulsion of the anterior papillary muscle and chordae to the anterior leaflet after successful cardiopulmonary resuscitation. Emergency repair of the papillary muscle was performed under cardiopulmonary bypass.
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- 2007
10. Broadband access in korea: experience and future perspective
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Dongmyun Lee and Yong-Kyung Lee
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Asymmetric digital subscriber line ,business.product_category ,Computer Networks and Communications ,Middle mile ,Broadband networks ,business.industry ,Computer science ,Mobile broadband ,Next-generation access ,Mobile broadband modem ,Computer Science Applications ,Internet Connection Sharing ,Broadband over power lines ,Digital subscriber line ,Wireless broadband ,Policies promoting wireless broadband in the United States ,Wireless lan ,Broadband ,Broadband Integrated Services Digital Network ,Internet access ,The Internet ,Electrical and Electronic Engineering ,business ,Telecommunications ,Municipal wireless network - Abstract
With the growing popularity of the Internet, Korea has been successful in providing broadband Internet services to the level of universal service. More than 70 percent of households have high-speed Internet connection, and their lives have been changed dramatically. The cutting edge technology of broadband Internet has a profound impact on many aspects of the economy, education, entertainment, and social culture. This article addresses the experiences and future perspectives of KT (formerly Korea Telecom) in providing the broadband network and services in Korea. We present our experiences in the deployment of the world's largest ADSL network, and our ongoing deployment of VDSL and WLAN. Based on the accomplishment in broadband access, we also provide a forecast on the next generation of broadband services and the corresponding technologies required to support these services.
- Published
- 2003
11. A comparative study of emergence agitation between sevoflurane and propofol anesthesia in adults after closed reduction of nasal bone fracture
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So Woon Ahn, Jinhye Min, Yong Kyung Lee, Young Shin Kim, Young Keun Chae, Young Soon Choi, Sang Eun Lee, and Jong Won Yoon
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Adult ,medicine.medical_specialty ,medicine.medical_treatment ,Sevoflurane ,Pacu ,lcsh:RD78.3-87.3 ,Emergence agitation ,Medicine ,Propofol anesthesia ,Propofol ,Reduction (orthopedic surgery) ,Nasal bone fracture ,Clinical Research Article ,biology ,business.industry ,biology.organism_classification ,Surgery ,Anesthesiology and Pain Medicine ,lcsh:Anesthesiology ,Bispectral index ,Anesthesia ,Anesthetic ,business ,medicine.drug - Abstract
Background: Emergence agitation is associated with increased morbidity and hospital costs. However, there have been few reports in the medical literature on the occurrence of emergence agitation in adults. The aim of this study was to compare emergence agitation between sevoflurane and propofol anesthesia in adults after closed reduction of nasal bone fracture. Methods: Forty adults (ASA I-II, 20-60 yr) undergoing closed reduction of nasal bone fracture were randomly assigned to either sevoflurane or propofol group and anesthesia was maintained with sevoflurane or propofol. The bispectral index (BIS) was monitored and maintained within 40-60. At the end of surgery, patients were transported to the post anesthetic care unit (PACU) and agitation state scale was checked by Aono's four-point scale (AFPS). Emergence agitation was defined as and AFPS score of 3 or 4. Pain score were measured by numeric rating scale (NRS) on arrival and peak value at PACU. Results: Nine (45.0%) patients in the sevoflurane group and 2 (10.0%) patients in the propofol group developed emergence agitation in the PACU (P = 0.031). There was no correlation between peak NRS and Aono's four-point scale. Conclusions: Propofol may decrease incidence of emergence agitation compared to sevoflurane in adults under going closed reduction of nasal bone fracture. (Korean J Anesthesiol 2012; 63: 48-53)
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- 2012
12. Electrooptic Bragg-deflection modulators: theoretical and experimental studies
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Shyh Wang and Yong-Kyung Lee
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Materials science ,Extinction ratio ,business.industry ,Materials Science (miscellaneous) ,Physics::Optics ,Bragg's law ,Optical field ,Epitaxy ,Industrial and Manufacturing Engineering ,Optics ,Surface wave ,Deflection (engineering) ,Electric field ,Optoelectronics ,Business and International Management ,business ,Voltage - Abstract
We have studied the mechanism of Bragg diffraction in electrooptic thin-film lightguides and examined in effectiveness of interaction between the electric field and optical field. Expressions for the full detail the deflection voltage and the power per bandwidth are obtained and applied to various modulator structures using out-diffused, metal-diffused, epitaxial, and sputtered-film (electrooptic substrate) waveguides. An expression for minimum interaction length to ensure better than 30-dB extinction ratio is derived. The theoretical results are checked with experimental observations from an electrooptic substrate modulator we fabricated, and good agreement is obtained.
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- 2010
13. Broadband Access Networks and Services in Korea
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Kil-Ho Song and Yong-Kyung Lee
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Broadband access networks ,business.industry ,Broadband networks ,Business ,Telecommunications ,Computer network - Published
- 2006
14. The effects of lidocaine and fentanyl on airway irritability during inhalation induction with desflurane
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Hong Seok Chae, Woo Kyung Lee, Young Soon Choi, Yong Ho Kim, In Gyu Choi, Young Keun Chae, Yong Kyung Lee, Jin Hye Min, Ae Re Lee, and Hyong Rae Cho
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Lidocaine ,business.industry ,Apnea ,Irritability ,Fentanyl ,Desflurane ,Anesthesiology and Pain Medicine ,Anesthesia ,Medicine ,Midazolam ,Premedication ,medicine.symptom ,business ,Tidal volume ,medicine.drug - Abstract
Background: Inhalation induction with desflurane can cause airway irritability and sympathetic stimulation. The aim of this study was to investigate whether lidocaine and fentanyl could reduce these unwanted reactions. Methods: Seventy-five patients who had premedication with midazolam were randomly allocated to one of three groups to receive intravenous saline (S group), lidocaine 1.5 mg/kg (L group), fentanyl 1 μg/kg (F group), respectively, before tidal volume induction with desflurane in oxygen and nitrous oxide. We recorded airway irritability such as cough, apnea, laryngospasm and excitatory movement and hemodynamic changes. Results: Airway irritability was not significantly different between the groups. In F group, mean blood pressure at LOC ver and LOC BIS and heart rate at LOC ver, LOC BIS and just before intubation were lower than those of S group (P < 0.05). Other results were not significantly different. Conclusions: The results of the study showed that intravenous fentanyl and lidocaine had no beneficial effects to reduce airway irritability, but intravenous fentanyl could significantly reduce hemodynamic stimulation during inhalation induction with desflurane in the patients who were premedicated with midazolam. (Korean J Anesthesiol 2009; 57: 693∼7)
- Published
- 2009
15. Tracheal Intubation using Remifentanil and No Muscle Relaxants: the Effect of Thiopental, Propofol, or Etomidate on Tracheal Intubating Conditions and Hemodynamic Changes
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Jin Hye Min, Woo Kyung Lee, Yong Ho Kim, Young Soon Choi, Yong Kyung Lee, Hyun Min Lee, and Young Keun Chae
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Mean arterial pressure ,medicine.diagnostic_test ,business.industry ,medicine.medical_treatment ,Tracheal intubation ,Laryngoscopy ,Remifentanil ,Anesthesiology and Pain Medicine ,Etomidate ,Anesthesia ,Heart rate ,medicine ,Intubation ,Propofol ,business ,medicine.drug - Abstract
Background: Many studies have suggested that propofol in combination with remifentanil may provide adequate conditions for tracheal intubation without the use of muscle relaxants. Other hypnotic drugs have not been thoroughly investigated in this regard. The goal of our study was to evaluate the effect of thiopental, propofol or etomidate on tracheal intubating conditions and hemodynamic changes using remifentanil in the absence of muscle relaxants. Methods: A total of 45 healthy adults were divided randomly into three groups. After iv lidocaine 1.5 mg/kg, thiopental 5 mg/kg (thiopental group) or propofol 2.5 mg/kg (propofol group), or etomidate 0.4 mg/kg (etomidate group) were injected. After the injection of study drugs, remifentanil 2 mcg/kg was administered. Ninety seconds after the administration of remifentanil, laryngoscopy and intubation were attempted. Intubating conditions were assessed and the mean arterial pressure and the heart rate was measured. Results: There were no significant differences in intubating conditions between patients in the three groups. The heart rate was significantly lower in the propofol and etomidate group patients when compared to the thiopental group patients after anesthetic induction. The mean arterial pressure was significantly lower in the propofol group patients when compared to the thiopental and etomidate group patients. Both heart rate and mean arterial pressure after tracheal intubation were significantly elevated in etomidate group patinets when compared to their preintubation value. Conclusions: The use of thiopental 5 mg/kg, propofol 2.5 mg/kg, and etomidate 0.4 mg/kg did not differ in effect under intubating conditions for tracheal intubation using remifentanil in the absence of muscle relaxants. Thiopental provided the best
- Published
- 2007
16. Spontaneous Intracranial Hypotension Treated with CT-guided Cervical Epidural Blood Patch - A case report
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Hong Seok Chai, Yong Ho Kim, Jin Hye Min, Woo Kyung Lee, Young Keun Chae, Yong Kyung Lee, and Young Soon Choi
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Cerebrospinal Fluid Leakage ,Epidural blood patch ,medicine.medical_specialty ,medicine.diagnostic_test ,Lumbar puncture ,business.industry ,Treatment options ,Surgical procedures ,Surgery ,Anesthesiology and Pain Medicine ,Anesthesia ,medicine ,Spontaneous Intracranial Hypotension ,Headaches ,medicine.symptom ,business ,Myelography - Abstract
Spontaneous intracranial hypotension due to spinal cerebrospinal fluid leakage is uncommon, relatively benign and usually self-limiting. However it is being increasingly recognized as a cause of postural headaches. The treatment options range from conservative supportive measures to an pidural blood patch. We report a 40-year-old woman who developed intracranial hypotention without any preceding events such as lumbar puncture, back trauma, surgical procedures or medical illnesses. The site of the cerebrospinal fluid leakage was identified at between the C1 to C2 level using computerized tomographic myelography. Consequently, the patient underwent a CT-guided autologous epidural blood patch at the C3-C4 level. Her symptoms were relieved immediately without recurrence.
- Published
- 2007
17. Effect of Preoperative Omitting Angiotensin-converting Enzyme Inhibitor on Hemodynamics in Patients Undergoing Off Pump Coronary Artery Bypass Surgery
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Soon Ho Nam, Hana Song, Sang Boem Nam, Yong Kyung Lee, Sungwon Na, Young Keun Chae, and Young Lan Kwak
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medicine.medical_specialty ,biology ,business.industry ,medicine.medical_treatment ,Hemodynamics ,Angiotensin-converting enzyme ,Anastomosis ,Surgery ,Norepinephrine (medication) ,Anesthesiology and Pain Medicine ,Blood pressure ,Internal medicine ,Anesthesia ,ACE inhibitor ,medicine ,biology.protein ,Cardiology ,business ,medicine.drug ,Off-pump coronary artery bypass ,Morning - Abstract
Background: Angiotensin-converting enzyme inhibitors (ACE-I) have been widely used for cardiac patients. This study investigated the effect of omitting ACE-I medication on hemodynamics during induction of anaesthesia and operation in patients chronically treated with ACE-I undergoing off pump coronary artery bypass graft surgery (OPCAB). Methods: Sixty patients scheduled for OPCAB were included in this study. Patients not treated with ACE-I were included in control group (Group 1, n = 20). And then, patients treated with ACE-I more than 4 weeks were randomly divided into two groups: continuing group including patients who continued ACE-I medication until the morning of surgery (Group 2, n = 20) and discontinuing group including patients who discontinued ACE-I one day before the surgery (Group 3, n = 20). Norepinephrine (8μg/ml) was infused when systolic blood pressure decreased below 90 mmHg during induction and operation. Amount of norepinephrine infused and hemodynamic data were recorded. Results: Significantly larger amount of norepinephrine was infused in Group 2 than in other two groups during obtuse marginal artery anastomosis. Total amount of norepinephrine infused during the all coronary anatsomosis was significantly larger in Group 2 than those values in other two groups. Conclusions: Continuing ACE-I treatment until the morning of surgery significantly increased the use of norepinephrine during the anastomosis. In contrast, there was no significant difference in the use of norepinephrine between Group 1 and Group 3. Discontinuing ACE-I before the surgery may helpful to maintain hemodynamics stable during coronary anastomosis in OPCAB. (Korean J Anesthesiol 2007; 52: 34~41)
- Published
- 2007
18. Tearing of the Mitral Valve during Vent Removal after a Successful Mitral Valve Repair: a Beneficial Role of Transesophageal Echocardiography
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Ji Young Kim, Yong Kyung Lee, Young Jun Oh, and Young Lan Kwak
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medicine.medical_specialty ,medicine.medical_treatment ,Case Report ,law.invention ,law ,Mitral valve ,Internal medicine ,medicine ,Cardiopulmonary bypass ,Humans ,cardiovascular diseases ,Intraoperative Complications ,Transesophageal echocardiography ,mitral valve insufficiency ,Mitral valve repair ,Cardiopulmonary Bypass ,business.industry ,General Medicine ,Middle Aged ,Cardiac surgery ,medicine.anatomical_structure ,Anterior mitral leaflet ,cardiovascular system ,Cardiology ,Mitral Valve ,Female ,business ,human activities ,Echocardiography, Transesophageal - Abstract
In this case, a successful mitral valve repair was confirmed by transesophageal echocardiography (TEE) at the end of a cardiopulmonary bypass. The left ventricular vent was placed through the mitral valve to remove the air after the TEE examination, and on its way out, the left ventricular vent damaged the anterior mitral leaflet (AML). Re-examination of the valve with TEE detected the new mitral valve insufficiency. The CPB was reinstituted, and tearing of the lateral third part of the anterior mitral leaflet was found. This case emphasizes the importance of TEE in the operating room as a continuous monitor, not only to evaluate the result of the cardiac surgery, but also to detect any unpredictable events during the surgery.
- Published
- 2006
19. Comparison of Clinical Characteristics in Controlled Ventilation and Spontaneous Breathing during Vital Capacity Inhalation Induction with Sevoflurane
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Yong Kyung Lee, Hae Keum Kil, Duck Hee Chun, Bon N. Koo, Joon Hee Park, and Won Oak Kim
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Mean arterial pressure ,business.industry ,Hemodynamics ,Sevoflurane ,Anesthesiology and Pain Medicine ,Blood pressure ,Anesthesia ,Heart rate ,medicine ,Breathing ,Expiration ,Alfentanil ,business ,medicine.drug - Abstract
Background: Although controlled ventilation can shorten the induction time during vital capacity inhalation induction (VCII) with sevoflurane, it may associated with decrease in blood pressure and hyperventilation-related hyperdynamic responses such as hypertension and tachycardia. This study was designed to compare the clinical effects between controlled ventilation (CV) within acceptable ranges of PET and spontaneous breathing (SB) during VCII. Methods: 100 patients were randomly allocated to the one of two groups. After the loss of consciousness during VCII with sevoflurane, controlled ventilation was applied in CV group within acceptable ranges of PET and spontaneous breathing was maintained in SB group. Alfentanil 4 mcg/kg was given i.v. 2 minutes prior to intubation. PET, mean arterial pressure (MAP), heart rate (HR), , and BIS were measured at 1, 2 and 3 minute after the loss of consciousness (LOC). Clinical side effects were evaluated. Results: MAP and HR were significantly decreased and increased in CV group compare to the baseline values at 1 minute after LOC. There were statistical differences of MAP and HR between two groups at 1 and 2 minutes after LOC. 46 of 50 (92%) showed delayed expiration with holding their breath >20 s in SB group. No differences of other clinical side effects except hypotension between two groups. Conclusions: We conclude that spontaneous breathing provides a stable hemodynamic status and relatively acceptable ventilation profile compare to controlled ventilation during VCII.
- Published
- 2005
20. Hemodynamic Effects of Modified Ultrafiltration (MUF) in Adult Patients Undergoing Valvular Heart Surgery
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Sun Jun Bai, Yong Kyung Lee, Jong Wook Song, Young Lan Kwak, Jong Hwa Lee, Ji-Young Kim, and Wook Park
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medicine.medical_specialty ,medicine.diagnostic_test ,Adult patients ,business.industry ,valvular heart disease ,Hemodynamics ,Hematocrit ,medicine.disease ,law.invention ,Surgery ,Cardiac surgery ,surgical procedures, operative ,Anesthesiology and Pain Medicine ,law ,Internal medicine ,medicine ,Modified ultrafiltration ,Cardiopulmonary bypass ,Cardiology ,business ,Hemodynamic effects - Abstract
Background: Modified ultrafiltration (MUF) has been demonstrated to have beneficial effects in children undergoing cardiac surgery with cardiopulmonary bypass (CPB). In adults, the hemodynamic effects of MUF are little known. The purpose of this investigation is to evaluate the hemodynamic effects of MUF in adult patients undergoing valvular heart surgery. Methods: 30 patients scheduled for elective mitral valvular surgery were randomized into either Ultrafiltration (U) or Control (C) group. In the U group, MUF was performed just after termination of CPB for 20 minutes, and not in the C group. Measurements of hemodynamic variables including right ventricular ejection fraction (RVEF) measured by thermodilution technique and hematocrit were performed before induction, just after termination of CPB, after completion of MUF and after sternal closure. Measurement after MUF in the C group was performed at 20 minutes after the termination of CPB. After transfer to ICU, same measurements were performed at postoperative 6 and 12 hrs. Results: After MUF, RVEF (P
- Published
- 2004
21. The Incidence of Nausea and Vomiting in Immediate Postanesthetic Period
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Mi Kyeong Kim, Jeong Mi Han, Jin Soo Kim, Yang Sik Shin, Sun Joon Bai, and Yong Kyung Lee
- Subjects
medicine.medical_specialty ,business.industry ,Patient-controlled analgesia ,Nausea ,Incidence (epidemiology) ,medicine.medical_treatment ,Enflurane ,Surgery ,Anesthesiology and Pain Medicine ,Isoflurane ,Anesthesia ,Vomiting ,Medicine ,medicine.symptom ,business ,Complication ,Postoperative nausea and vomiting ,medicine.drug - Abstract
Background: Postoperative nausea and vomiting (PONV) continues to be a common complication of surgery and patients report that avoidance of PONV is of greater concern than avoidance of postoperative pain. The overall incidence of postoperative nausea and vomiting has been reported to be in the 20-30%. The incidence of PONV in the recovery room was 9-10% but it was increased 30% during the first 24 hours after surgery. This retrospective study was designed to find the incidence of PONV in immediate postanesthetic period as well as the difference in incidence of PONV due to gender, age, duration of surgery, different inhalation agents and method of patient controlled analgesia. Methods: The anesthesia and postanesthesia records for 12,895 patients receiving surgery under general and regional anesthesia between September 2001 and August 2002 one year were retrospectively reviewed. Results: The overall incidence of nausea, vomiting and nausea/vomiting (either nausea, vomiting or both) in immediate postanesthetic period was 1.5%, 2.0% and 2.9% of patients, respectively. The incidence of nausea, vomiting and nausea/vomiting in immediate postanesthetic period was significantly higher in female than in male, general anesthesia with enflurane than with sevoflurane or isoflurane, and patients receiving patient controlled analgesia (PCA) via intravenous route than via epidural route. The incidence of nausea, vomiting and nausea/vomiting in immediate postanesthetic period was significantly lower in surgery duration less than 60 minutes. Conclusions: Patients with female gender, intravenous PCA and under enflurane anesthesia had significantly higher incidence of nausea, vomiting and nausea/vomiting in immediate postanesthetic period.
- Published
- 2004
22. Rupture of the Myocardium during the Removal of the Cardiac Pacemaker Electrode: A case report
- Author
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Yong Kyung Lee, Young Jun Oh, Ji-Young Kim, Young Lan Kwak, Seungho Kim, and Jong Wook Song
- Subjects
medicine.medical_specialty ,Cardiac pacemaker electrode ,Cardiac pacing ,business.industry ,Traction Method ,medicine.disease ,Myocardial rupture ,law.invention ,Surgery ,Anesthesiology and Pain Medicine ,law ,Permanent cardiac pacemaker ,Internal medicine ,Cardiac tamponade ,Cardiopulmonary bypass ,medicine ,Cardiology ,Permanent pacemaker ,business - Abstract
Infection of pacemaker electrode is one of the most frequent causes for the removal of the permanent cardiac pacemaker electrode and it is dangerous to remove the infected electrode by external traction method because the electrode is adhered to the myocardium. In this case, surgeon tried to remove infected cardiac pacing electrode using continuous external traction method. Myocardial rupture and consequent cardiac tamponade suddenly developed because the electrode was pulled by force. Emergent cardiopulmonary bypass was initiated and then, ruptured myocardium was repaired and the remaining electrode was removed without remarkable complications. This case emphasizes the risk of the myocardial rupture and the importance of preparing for emergent situation which can occur during the removal of the permanent pacemaker electrode, especially when the reason for the removal is the infection.
- Published
- 2004
23. Effect of Preoperative Angiotensin-Converting Enzyme Inhibitor on Hemodynamics and Vasoconstrictor Requirements in Patients Undergoing Off-Pump Coronary Artery Bypass Surgery
- Author
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Young Jun Oh, Young Lan Kwak, Sin Hyung Kim, Ji-Young Kim, Seungho Kim, Sun Joon Bai, and Yong Kyung Lee
- Subjects
Mean arterial pressure ,medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Central venous pressure ,Hemodynamics ,Anastomosis ,Surgery ,Coronary artery bypass surgery ,Anesthesiology and Pain Medicine ,medicine.anatomical_structure ,Right coronary artery ,medicine.artery ,Anesthesia ,Internal medicine ,medicine ,Vascular resistance ,Cardiology ,cardiovascular diseases ,business ,Off-pump coronary artery bypass - Abstract
Background: This study examined the effect of chronic preoperative ACEI treatment on hemodynamics and the amount of vasoconstrictor used to maintain mean arterial pressure (MAP) during off-pump coronary artery bypass surgery (OPCAB) Methods: Sixty patients undergoing OPCAB were divided into two groups: ACEI group, in which patients were treated with ACEI preoperatively (n = 30) and control group, in which patients were not treated with ACEI preoperatively (n = 30). Norepinephrine was infused when MAP decreased below 70 mmHg during operation. Hemodynamic variables and amount of norepinephrine infused were obtained during pericardiotomy and during the anastomosis of each coronary artery including left anterior descending artery (LAD), obtuse marginal artery (OM) of left circumflex coronary artery, and posterior descending artery (PDA) of right coronary artery. Results: During LAD, OM, and PDA anastomosis, cardiac index and mixed venous oxygen saturation were decreased and central venous pressure and systemic vascular resistance index were increased significantly in both group. There was no significant difference in hemodynamic variables, including MAP, between two groups during all study period. During OM anastomosis, amount of norepinephrine infused to maintain MAP was significantly greater in ACEI group than in control group Conclusions: Preoperative treatment with ACEI significantly increased amount of vasoconstrictor used to maintain target MAP during OM anastomosis, which has been known as hemodynamically unstable period during OPCAB, and cautious management is required to maintain MAP.
- Published
- 2004
24. The Effect of Acupotomy in Trapezius Myofascial Pain Syndrome
- Author
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Won Oak Kim, Kyung Bong Yoon, Shin Hyung Kim, Duck Mi Yoon, Yong Kyung Lee, Won Ju Kim, and Hyun Dong Shin
- Subjects
medicine.medical_specialty ,Anesthesiology and Pain Medicine ,medicine.anatomical_structure ,business.industry ,Pain relief ,Physical therapy ,medicine ,Skeletal muscle ,Myofascial pain syndrome ,medicine.disease ,business ,Trapezius muscle - Abstract
Background: Myofascial pain syndrome is characterized by the presence of hypersensitive points, called 'trigger points'. Trigger points are discrete, focal, hyperirritable spots located in a taut band of skeletal muscle. Numerous therapeutic approaches have been used to treat myofascial pain syndrome. An acupotomy has been applied for various pain conditions in China since the 1980's. This investigation evaluated the efficacy of an acupotomy in myofascial pain syndrome. Methods: Twenty females, with myofascial pain syndrome on trapezius muscle, were treated with an acupotomy. The pretreatment resting and pressing on pain site visual analog scores (VAS) were compared with those 7 days post-treatment. At the same time, the effects of the acupotomy were graded as almost complete pain relief, good relief, slight relief, no change or aggravation at 7 and 14 days post-treatment. Results: The pre-treatment resting and pressing on the pain site mean VAS were 7.2 and 9.2, respectively. The post-treatment resting and pressing on pain site mean VAS decreased significantly to 1.0 and 2.8, respectively (P
- Published
- 2004
25. Is Central to Peripheral Arterial Pressure Gradient Influenced by Cardiac Output and Vasoactive Drugs in Canines Undergoing Cardiopulmonary Bypass?
- Author
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Sang Hwa Kang, Yon Hee Shim, Young Jun Oh, Young Lan Kwak, Young Hwan Park, Yong Kyung Lee, and Yong Woo Hong
- Subjects
medicine.medical_specialty ,Cardiac output ,business.industry ,law.invention ,Peripheral ,Anesthesiology and Pain Medicine ,Blood pressure ,law ,Internal medicine ,Continuous noninvasive arterial pressure ,Vasoactive ,Anesthesia ,Cardiopulmonary bypass ,Cardiology ,medicine ,business - Published
- 2001
26. Anesthesia for Cardiac Surgery in a Patient with Unsuspected Cold Agglutinin Disease
- Author
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Sung Yong Park, Yon Hee Shim, Young Lan Kwak, Yong Kyung Lee, and Yong Woo Hong
- Subjects
medicine.medical_specialty ,Anesthesiology and Pain Medicine ,business.industry ,Cold agglutinin disease ,Anesthesia ,Medicine ,business ,medicine.disease ,Cardiac surgery ,Surgery - Published
- 2000
27. Electrooptic guided-to-unguided mode converter
- Author
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Yong-Kyung Lee and Shyh Wang
- Subjects
Permittivity ,Materials science ,Magnetoresistance ,business.industry ,chemistry.chemical_element ,Light guide ,Optical polarization ,Military computing ,Condensed Matter Physics ,Polarization (waves) ,Atomic and Molecular Physics, and Optics ,Optics ,chemistry ,Electrode ,Electrical and Electronic Engineering ,Tellurium ,business - Abstract
Experimental demonstration of electrooptic polarization conversion from a guided TE wave to an unguided TM wave in a thin-film light guide is reported. In the specific device we fabricated utilizing Ta 2 O 5 film and LiTaO 3 substrate, we have observed a 40-percent modulation when 500 V were applied across two electrodes spaced 50 μm apart. We present here a ray-optics analysis of the conversion process. With the inclusion of the Goos-Haenchen shifts, the analysis agrees well with the experiment.
- Published
- 1976
28. Tantalum oxide light guide on lithium tantalate
- Author
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Shyh Wang and Yong‐Kyung Lee
- Subjects
Thermal oxidation ,Materials science ,Physics and Astronomy (miscellaneous) ,business.industry ,Inorganic chemistry ,Light guide ,Substrate (electronics) ,Crystal ,chemistry.chemical_compound ,chemistry ,Lithium tantalate ,Optoelectronics ,Isolation layer ,Tantalum oxide ,business ,Layer (electronics) - Abstract
A technique is reported which allows formation of a light‐guiding Ta2O5 film onto an electro‐optic LiTaO3 crystal. We find it necessary to have an isolation layer (a 144‐A SiO2 layer in our case) between the Ta film and the substrate in order to prevent interactions between them during thermal oxidation of the Ta film. Possible applications of the structure to thin‐film electro‐optic and acousto‐optic devices are examined.
- Published
- 1974
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