• Title/Summary/Keyword: defibrillation

Search Result 62, Processing Time 0.022 seconds

The Effects of Slide-Covered of Slide-Covered Contemporary Charging Automated External Defibrillator on Rapidity and Convenience of Defibrillation (슬라이드 커버 동시충전 자동심장충격기가 제세동의 신속성과 편의성에 미치는 효과)

  • Park, Si-Eun
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.21 no.8
    • /
    • pp.325-333
    • /
    • 2020
  • This study compares the rapidity and subjective convenience of T-AED and SC-AED for health care providers and the general public. Subjects were randomly allocated to T-AED (n=77) and SC-AED (n=79) groups. Each group conducted defibrillation, with subsequent measurement of the rapidity of defibrillation in peri-shock pause, pre-shock pause, hesitation pause, and post-shock pause. Defibrillation and chest compression delay times for both equipment were analyzed by t-test. On conclusion of the experiment, subjects answered a questionnaire on the subjective convenience of defibrillation, as measured for confidence, convenience, and clear decision. Comparisons of subjective convenience analyzed by t-test revealed significantly shortened peri-shock pause (11.22s), pre-shock pause (11.04s), and hesitation pause (2.15s) in the SC-AED group, as compared to the T-AED group (p<0.001). However, no significant differences were observed for post-shock pause values. Comparing subjective convenience, confidence (T-AED: 7.62±1.25VAS vs. SC-AED: 7.80±0.98VAS, p=0.358) was not significant, whereas convenience (T-AED: 7.05±1.36VAS vs. SC-AED: 8.95±0.89VAS, p<0.001) and clear decision (T-AED: 6.58±1.73VAS vs. SC-AED: 9.08±0.98VAS, p=0.001) showed statistically significant differences. Our results indicate that compared to T-AED, SC-AED has significantly shortened pauses. Moreover, it is more convenient for the user, and significantly aids in clear decisions.

Analysis of the Likelihood of Successful Defibrillation as a Change of Cardiopulmonary Resuscitation Transition using Support Vector Machine (서포트 벡터 머신을 이용한 심폐소생술 변이의 변화에 따른 제세동 성공률 분석)

  • Jang, Seung-Jin;Hwang, Sung-Oh;Lee, Hyun-Sook;Yoon, Young-Ro
    • Journal of Biomedical Engineering Research
    • /
    • v.28 no.4
    • /
    • pp.556-568
    • /
    • 2007
  • Unsatisfied results of return of spontaneous circulation (ROSC) estimates were caused by the fact that the predictability of the predictors was insufficient. This unmet estimate of the predictors may be affected by transitional events due to behaviors which occur during cardiopulmonary resuscitation (CPR). We thus hypothesized that the discrepancy of ROSC estimates found in statistical characteristics due to transitional CPR events, may affect the performance of the predictors, and that the performance of the classifier dichotomizing between ROSC and No-ROSC might be different during CPR. In a canine model (n=18) of prolonged ventricular fibrillation (VF), standard CPR was provided with administration of two doses of epinephrine 0 min or 3 min later of the onset of CPR. For the analysis of the likelihood of a successful defibrillation during CPR, Support Vector Classification was adopted to evaluate statistical peculiarity combining time and frequency based predictors: median frequency, frequency band-limited power spectrum, mean segment amplitude, and zero crossing rates. The worst predictable period showed below about 1 min after the onset of CPR, and the best predictable period could be observed from about 1.5 min later of the administering epinephrine through 2.0-2.2 min. As hypothesized, the discrepancy of statistical characteristics of the predictors was reflected in the differences of the classification performance during CPR. These results represent a major improvement in defibrillation prediction can be achieved by a specific timing of the analysis, as a change in CPR transition.

A survived case after 150J defibrillation and CPR were performed for out-of-hospital infant cardiac arrest (병원 전 영아 심정지 환자에서 150J 제세동과 심폐소생술 시행 후 생존한 1례)

  • Yun, Hyeong-Wan;Hong, Soo-Mi;Jeon, Yoon-Chul;Lee, Jae-Min
    • The Korean Journal of Emergency Medical Services
    • /
    • v.17 no.3
    • /
    • pp.53-60
    • /
    • 2013
  • Purpose: The purpose of the study is to emphasize the importance of out-of-hospital cardiac arrest resuscitation. This resuscitation by paramedic is very effectively performed under the medical direction of the doctors. Methods: The cardiac arrest victim was 4 month old infant. Informed consent from the parents of the infant was received. CPR combined with 150J defibrillation was performed to the 4 month old infant. Results: We reported that the 4 month old infant survived the cardiac arrest. Out-of-hospital cardiac arrest infant survived after 150J automated external defibrillator and CPR performance. Conclusion: Specific operative protocol is important because the paramedic can apply the proper manual defibrillator effectively. It is important to extend the work scpoe of the EMT.

A Study on college students ability to use automated external defibrillator(AED) (일반대학생에 의한 자동제세동기 사용 능력 연구)

  • Yang, Hyun-Mo;Kwon, Chan-Yang
    • The Korean Journal of Emergency Medical Services
    • /
    • v.21 no.2
    • /
    • pp.63-69
    • /
    • 2017
  • Purpose: The purpose of the study was to compare the ability of college students to use automated external defibrillators (AED) and to provide a basic data for helping laypersons easily apply the AED. Methods: The subjects were randomly assigned to instruction groups. One group was instructed by pictures (group P), one by videos (group M), and one by telephone dispatchers (group D), Without employing cardiopulmonary resuscitation, a single rescuer was asked to apply defibrillation to a mannequin for practice in accordance with the instructions assigned to each group. Results: Regarding the proper pad attachment of the AED, group P followed the instruction $0.31{\pm}0.47times$, group M, $0.81{\pm}0.40times$, and group D $0.69{\pm}0.47times$. Regarding the instruction of taking the hand off a patient for analyzing cardiac rhythm and the instruction of taking the hand off a patient before defibrillation, group P did not follow the instruction; group M followed the instructions $0.50{\pm}0.51times$; and group D followed all instructions at all times. Conclusion: If a dispatcher gives real-time instructions for using an AED to laypersons wtih no experience at the time of AED use, the quality of laypersons' AED use will greatly improve.

Case report : Administration of amiodarone for polymorphic ventricular tachycardia due to long QT syndrome during out-of-hospital advanced cardiac life support (병원 밖 전문 심장소생술에서 긴QT증후군에 의한 Polymorphic Ventricular Tachycardia에 아미오다론이 투여된 1예)

  • Kang, Min Seong;Kim, Ji-Won
    • The Korean Journal of Emergency Medical Services
    • /
    • v.24 no.3
    • /
    • pp.155-160
    • /
    • 2020
  • Torsades de pointes refers to polymorphic ventricular tachycardia (PMVT), which is caused by the suppression of potassium channels owing to genetic and electrolytic abnormalities, resulting in the extension of the QT interval. Symptoms range from spontaneous circulation recovery to fainting and sudden death. Defibrillation, magnesium correction, and the use of lidocaine as an antiarrhythmic agent are recommended as treatments for persistent torsades de pointes. Currently, only amiodarone is available in the ambulance; however, torsades de pointes does not respond efficiently to amiodarone because it suppresses potassium channels and increases the refractory period of the myocardium. Lidocaine, in contrast, reduces the relative refractory period of the myocardium caused by suppressing sodium channels; thus, it inhibits the occurrence of and treats arrhythmia. In cases where PMVT did not respond to defibrillation, the administration of lidocaine showed no difference in survival and discharge rates compared to amiodarone. Thus, ambulances must be equipped with provisions to administer lidocaine.

A Simulation study on the Cardiac Current Density distribution during the Defibrillation Shock (제세동 쇼크에 의한 심장 전류밀도 분포에 관한 시뮬레이션 연구)

  • Lee, J.;Park, K. L.;Lee, K. J.
    • Journal of Biomedical Engineering Research
    • /
    • v.21 no.4
    • /
    • pp.403-409
    • /
    • 2000
  • This paper is about to simulate the defibrillation situations using 3D FE(finite element) thorax model and describes the effects of three clinical electrodes' positions and size and organ's resistivity used in simulation on the characteristics of current density distribution over myocardium. The model was constructed with a eillipsoidal cylinder for the thorax and the 2D Visible Human images for remains. And, the distributions of current density were computed by a commercial program ANSYS 5.4. The electrical shock of the AP(anterior-posterior ) electrode provided more current flows with heart than the others and that of the LL(lateral-lateral) electrode showed the most uniform current density distribution. However, the electrode size had little effect on the current density distribution. In the evaluation of model's sensitivity to tissue resistivity variation, the variation of the myocardium's resistivity most affected the minimum, average and maximum current densities.

  • PDF

Preparation of Lignocellulose Nanofiber by Mechanical Defibrillation After Pretreatment Using Cosolvent of Ionic Liquid and DMF (이온성 액체/DMF 혼합용매 전처리 후 기계적 해섬을 통한 리그노셀룰로오스 나노섬유의 제조)

  • Han, Song-Yi;Park, Chan-Woo;Lee, Seung-Hwan
    • Journal of the Korean Wood Science and Technology
    • /
    • v.45 no.3
    • /
    • pp.268-277
    • /
    • 2017
  • In this study, lignocellulose nanofibrils (LCNFs) were prepared from Pussy willow wood powder by disk-milling after pretreatment using the cosolvent of 1-ethyl-3-methylimidazolium acetate ([EMIM]Ac) and N,N-dimethylformamide (DMF) with different mixing ratios for different time. All pretreated samples showed native cellulose I polymorph and cellulose crystallinity was lowest when cosolvent of DMF with 30% [EMIM]Ac was used. Average crystallite size of raw material and the pretreated product by MDF and its cosolvent with 10% [EMIM]Ac was found to be about 3.2 nm and decreased with increasing pretreatment time at the DMF cosolvent with 30% [EMIM]Ac. Defibrillation efficiency was improved by loosening wood cell wall structure by the pretreatment using co-solvent system of [EMIM]Ac and DMF.

Analysis of Bystander Cardiopulmonary Resuscitation and Public Access Defibrillation Utilization -Convergence Study based on the Data of Daegu - (목격자에 의해 시행된 심폐소생술 및 자동심장충격기 시행률 분석 -대구광역시 자료기반 법률 및 지침 고찰을 통한 융합연구-)

  • Park, Si-Eun
    • Journal of the Korea Convergence Society
    • /
    • v.13 no.3
    • /
    • pp.265-274
    • /
    • 2022
  • This study was conducted on 3,418 cases of cardiopulmonary arrest patients' detailed status table (2020, raw data) collected in 2020. Also, it is a retrospective narrative research that investigates and examines related laws and guidelines. The main findings are as follows. First, the implementation rate of 'bystander CPR' was 30.66% (1047 cases) and it was a remarkable result. It can be inferred the quality of the relevant laws and guidelines. Second, 'Public access defibrillation (shock)' accounted for only 0.10%(5 cases). it is considered that the relevant laws and guidelines are weighted towards 'stock and obligation.' Strategic differentiation of response by region is needed. Third, out-of-hospital cardiac arrest occurred at house was 71.97%(2,640 cases). To operate the 'special ambulance team' efficiently, it is necessary to analyze regional data more closely and develop an efficient strategy in the future.