• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.7
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• pp.1591-1597
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• 2011

In this paper, on cardiopulmonary function in the intensive care unit over the direction of the state to define the diagnostic or therapeutic cardiac output Study on Implementation of measures as a platform, Swan-Ganz Catheter with sensor inserted into the body by inserting a saline solution Using temperature change caused by using thermodilution be used to obtain cardiac output. Swan-Ganz Catheter with temperature sensors and pressure sensors and sensor value which is entered through the acquisition more closely if the cardiac output CO, systemic and pulmonary vascular resistance, oxygen consumption and may be able to more accurately calculate the patient's condition than accurate diagnosis and treatment is possible.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.60 no.7
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• pp.1417-1426
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• 2011

Radiofrequency ablation through cardiac catheterization is one of minimally invasive intervention procedures used in drug resistant arrhythmia treatment. To facilitate more accurate and precise catheter navigation, systems for robotic cardiac catheter navigation have been developed and commercialized. The authors have been developing a novel robotic catheter navigation system. The system is a network-based master-slave configuration 3-DOF (Degree-Of-Freedom) robotic manipulator for operation with conventional cardiac ablation catheter. The catheter manipulation motion is composed of the translation (forward/backward) and the roll movements of the catheter and knob rotation for the catheter tip articulation. The master manipulator comprises an operator handle compartment for the knob and the roll movement input, and a base platform for the translation movement input. The slave manipulator implements a robotic catheter platform in which conventional cardiac catheter is mounted and the 3-DOF motions of the catheter are controlled. The system software that runs on a realtime OS based PC, implements the master-slave motion synchronization control in the robot system. The master-slave motion synchronization performance tested with step, sinusoidal and arbitrarily varying motion commands showed satisfactory results with acceptable level of steady state error. The developed system will be further improved through evaluation of safety and performance in in vitro and in vivo tests.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.10a
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• pp.549-552
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• 2009

본 논문에서는 심폐기능에 이상이 있는 중환자의 지속적인 감시와 진단을 위한 방법으로 Swan-Ganz Catheter를 체내에 삽입하여 심박 출량과 혼합정맥혈 산소포화도를 기존 장비들보다 정밀하게 측정할 수 있는 모듈을 개발하고자 한다. Swan-Ganz Catheter에는 두 개의 온도센서와 한개의 압력센서를 포함하고 있으며 이를 통해 입력되는 센서 값을 세밀하게 수집하고 이를 기반으로 일회 심박 출량, 전신 및 폐혈관저항, 산소소모량 등을 계산하여 환자의 상태를 보다 정확하게 진단 및 치료가 가능하게 한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.473-476
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• 2010

본 논문에서는 심폐기능에 이상이 있는 중환자의 상태를 진단하기 위한 방법으로 Swan-Ganz Catheter를 체내에 삽입하여 심박 출량과 혼합정맥혈 산소포화도를 기존 장비들보다 정밀하게 측정할 수 있는 모듈을 개발하고자 한다. Swan-Ganz Catheter에는 두 개의 온도센서와 세 개의 압력센서를 포함하고 있으며 이를 통해 입력되는 센서 값을 세밀하게 수집하고 이를 기반으로 일회 심박출량, 전신 및 폐혈관저항, 산소소모량 등을 계산하여 환자의 상태를 보다 정확하게 진단 및 치료가 가능하게 한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.05a
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• pp.194-197
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• 2012

The purpose of the thesis is to develop a module which can measure precise Continuous Cardiac Output(CCO) better than existing equipments for the critical cardiopulmonary patient diagnosis purpose. This module enables more precise and effective diagnosis and treatment for the patient by compensating old method which injected cold liquid to inside of heart to measure the CCO.

• Journal of Chest Surgery
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• v.46 no.2
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• pp.142-145
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• 2013

An increase in cardiac radiofrequency catheter ablation for treating refractory atrial fibrillation has resulted in an increased prevalence of complications. Among numerous complications of radiofrequency catheter ablation, atrio-esophageal fistula, although rare, is known to have fatal results. We report a case of successful management of an atrio-esophageal fistula as a complication of cardiac radiofrequency catheter ablation.

• Journal of Chest Surgery
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• v.28 no.6
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• pp.606-609
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• 1995

We have experienced ten cases of emergent operation for the complications of cardiac catheterization during the period from 1985 to September 1994.Catheterization was done for the evaluation of the cardiac or vascular problem in 8 cases and 2 cases of neurosurgical problem. The extracardiac injection of contrast material have occurred in 3 cases[primum ASD,Trilogy,VSD . Six cases were unable to remove the catheter from femoral artery or vein. The catheters were knotted, coiled, impacted or broken. An embolectomy was done 40 years old man who suffered from chronic left subclavian artery obstruction a day after angiography. Open heart surgery was performed in 5 cases of cardiac perforation,impacted catheter in left inferior pulmonary vein and broken catheter of VSD. Arteriotomy was done in 4 cases to remove the knotted and coiled catheter. There was no complication or mortality for the emergent operation.

• Korean Journal of Radiology
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• v.22 no.4
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• pp.525-534
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• 2021

Objective: To assess the effect of left atrial appendage (LAA) isolation on LAA emptying and left atrial (LA) function using cardiac MRI in patients who underwent successful catheter ablation of atrial fibrillation (AF). Materials and Methods: This retrospective study included 84 patients (mean age, 59 ± 10 years; 67 males) who underwent cardiac MRI after successful catheter ablation of AF. According to the electrical activity of LAA after catheter ablation, patients showed either LAA isolation or LAA normal activity. The LAA emptying phase (LAA-EP, in the systolic phase [SP] or diastolic phase), LAA emptying flux (LAA-EF, mL/s), and LA ejection fraction (LAEF, %) were evaluated by cardiac MRI. Results: Of the 84 patients, 61 (73%) and 23 (27%) patients showed LAA normal activity and LAA isolation, respectively. Incidence of LAA emptying in SP was significantly higher in LAA isolation (91% vs. 0%, p < 0.001) than in LAA normal activation. LAA-EF was significantly lower in LAA isolation (40.1 ± 16.2 mL/s vs. 80.2 ± 25.1 mL/s, p < 0.001) than in LAA normal activity. Furthermore, LAEF was significantly lower in LAA isolation (23.7% ± 11.2% vs. 31.1% ± 16.6%, p = 0.04) than in LAA normal activity. Multivariate analysis demonstrated that the LAA-EP was independent from LAEF (p = 0.01). Conclusion: LAA emptying in SP may be a critical characteristic of LAA isolation, and it may adversely affect the LAEF after catheter ablation of AF.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.4
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• pp.959-964
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• 2013

This study materialized the new module which enables to measure more precise data than the existing modules in order to examine the cardiac disorder critical patient's state by using Swan-Ganz Catheter. There was bolus type CO(Cardiac Output) module which measured CO by measuring the blood changes in temperature and recovery time by injecting cold sap into the heart in the past, but recently, it is not used in most of hospitals due to limit of difficulty of continuous monitoring for the patients. To overcome this limit, the continuous cardiac output measurement platform was materialized to enable the continuous monitoring for patients. The wasted cost issues because of introducing the expensive imported equipment to observe the critical patient`s state with abnormal cardiopulmonary function in the hospitals can be solved by using this new module, and the problem of existing modules should be supplemented for more accurate diagnosis by collecting more precise data.

• Journal of Chest Surgery
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• v.54 no.5
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• pp.377-382
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• 2021

Background: Subclavian vein (SV) catheterization is a method for the delivery of fluids, drugs, and blood products, venous blood sampling, and central vein pressure monitoring in cardiac surgery. Catheter occlusion is a serious complication of SV catheterization during cardiac surgery, especially after sternal retractor expansion. Methods: In this observational study, 303 patients who had successful right infraclavicular SV catheterization from September 2019 to April 2020 were enrolled to determine the incidence of catheter occlusion. After catheterization, the lumens of all catheters were checked for the ability to infuse and withdraw blood from the catheter before and after sternal retractor expansion. The patients' characteristics, cannulation approach, on-pump or off-pump technique, occlusion of the catheter and its lumens, and any associated complications were recorded. The data were analyzed using IBM SPSS ver. 22.0 (IBM Corp., Armonk, NY, USA). Results: Of the 303 patients studied, 205 were male (67.7%) and 98 were female (32.3%). Catheter occlusion occurred in 11 patients with on-pump cardiopulmonary bypass (CPB) (227 patients) and 4 patients with off-pump CPB (76 patients) (p=0.863). The incidence of catheter occlusion was 4.95% (15 of 303 patients) with no cases of simultaneous 3-lumen occlusion in a catheter. The most commonly occluded lumen was the distal lumen (57.92%). Simultaneous 2-lumen occlusion occurred in 4 patients. Catheter occlusion was found in 3 of 13 malpositioned catheters (23.07%). Conclusion: The current study showed that malpositioning of the catheter tip was a risk factor for catheter occlusion and that the distal lumen of a triple-lumen catheter was the most commonly occluded lumen.