• International Journal of Advanced Culture Technology
• /
• 제10권4호
• /
• pp.434-443
• /
• 2022

CPR in High-rise building is one of the challenging tasks to 119 paramedics, evacuating patient from the narrow and vertical area. This study was built to compare the method of mechanical CPR and manual CPR is to maximizing on-scene treatment time, and minimizing the hand-off time in cardiac arrest, transporting patient as fast as possible. The electronic data research (Science, Pubmed, Medline, Medline and 55 academic DB interworking) was conducted, and five articles were included by reviewing and excluding through the Covidence program and Review Manager version 5.4(Cochrane Collaboration). OHCA occurring on the higher floor indicates lower in survival. A total studies uniformly reported mechanical CPR is more effective during the high-rise building evacuation, than manual CPR in rate, depth, and hands-on time of chest compression. Use of mechanical CPR device is more suitable in case of High-rise building OHCA to improve the survival rate which is affected by high-quality CPR.

• 한국응급구조학회지
• /
• 제24권2호
• /
• pp.39-50
• /
• 2020

Purpose: This study aimed to compare the effect of chest compression and the resulting ventilation volume in walking cardiopulmonary resuscitation (CPR), straddling CPR, and mechanical CPR while moving manikins to main stretchers. Methods: We compared the chest compressions in terms of compression depth, number of incomplete releases, complete release depth, compression rate, duration between peak time of previous compression and peak time of current compression, and respiration. We analyzed the compression comparatively with the ventilation volume in three different types of CPR. Results: The chest compression depth was significantly improved during straddling CPR as compared to walking CPR, during which women were unable to achieve sufficient chest compression depth. A constant chest compression depth was maintained during mechanical CPR. Conclusion: High-quality chest compressions were difficult to achieve in moving spaces. Further, walking CPR may be helpful in men, but straddling or applying automatic chest compressions in women would result in more effective CPR. Our findings demonstrate the limitations and trends in administering CPR in men and women, which may be useful in devising better education and training methods in the future.

• 대한의용생체공학회:의공학회지
• /
• 제38권4호
• /
• pp.211-217
• /
• 2017

During the emergency situation such as cardiac arrest, cardiopulmonary resuscitation(CPR) is the most important treatment to maintain patient's blood circulation. Since the quality of CPR can not be easily measured or evaluated by the eye, an assistive device with an accelerometer can help to assess the pressure depth of CPR. In this study, we propose a single frequency analysis method to reduce the error of the accelerometer by extracting only one frequency component from the Fourier transform process. To verify the effectiveness of the single frequency analysis, acceleration data at CPR conditions were measured at a sampling rate of 50 / sec using a wristband equipped with an acceleration sensor. Then, We compared the existing distance estimation method and the single frequency analysis method using the measured data. The amplitude value proportional to the compression depth was obtained by applying the single frequency analysis method.

• 융합정보논문지
• /
• 제9권11호
• /
• pp.227-233
• /
• 2019

본 연구는 병원 전 환경에서 기계식 가슴압박기(LUCAS)와 수기심폐소생술의 비교실험을 통해 가슴압박의 질을 평가하고 기계적 가슴압박기를 사용한 효과적인 전문심장소생술을 제안하는데 그 목적이 있다. 병원 전 심정지상황을 가정하고 구급대원이 3인 1조로 현장에서 수기심폐소생술과 LUCAS를 이용한 심폐소생술을 적용하고, 구급차로 이송하며 수기심폐소생술과 LUCAS를 이용한 심폐소생술을 시행하였다. 연구결과는 다음과 같다. 첫째, 현장과 이송중의 수기심폐소생술의 비교결과 현장에서 수기심폐소생술이 평균압박깊이와 압박률, 이완율에서 유의한 차이가 나타났다(p<.001). 둘째, 현장에서 수기심폐소생술과 LUCAS를 비교한 결과 LUCAS가 압박률, 이완율에서 유의한 차이가 나타났다(p<.001). 셋째, 구급차로 이송중 수기심폐소생술과 LUCAS를 비교한 결과 평균압박깊이, 압박률, 분당압박횟수에서 유의한 차이를 보였다(p<.001). 위와 같은 결과로 보아 LUCAS는 적절한 압력으로 가슴압박을 수행할 수 있고, 그 동안 구급대원의 전문기도기 삽입, 정맥로 확보 등의 전문심장소생술을 추가적으로 수행할 수 있으며 환자의 소생률을 높이는데 기여할 것이다.

• 한국응급구조학회지
• /
• 제22권3호
• /
• pp.67-76
• /
• 2018

Purpose: The purpose of this study was to evaluate the quality of chest compressions and ventilation when using an mechanical device(LUCAS) and 2-men manual cardiopulmonary resuscitation(CPR) performed on a minikin, as well as to propose a more effective CPR method during transit. Methods: Data were collected by LUCAS and manual virtual reality based ambulance simulation. Analysis was performed using SPSS software 12.0. The average and standard deviation of chest compression depth and ventilation were analyzed using descriptive statistics and t-test. Results: In the virtual reality based LUCAS and manual CPR results, LUCAS showed better chest compression and lower incomplete chest release than manual CPR. During CPR with a chest compression-ventilation ratio of 30:2 in virtual reality ventilation with bag-valve mask was able to deliver an adequate volume of breathing. Conclusion: It is suggested that rescuers on ambulance may consider using LUCAS as an alternative to high-quality chest compression during transit.

• 한국응급구조학회지
• /
• 제24권1호
• /
• pp.77-84
• /
• 2020

Purpose: This study was conducted to determine effective chest compression methods that could be used when performing cardiopulmonary resuscitation in rocking boats. Methods: Tests were conducted for four minutes using manual and mechanical chest compressions on two mannequins, placed in boats, and moving at a speed of 35km/hours on calm sea surfaces with wave heights of 0.5m and wind speeds of 2-3m/s (testing for two minutes, followed by rest, then a second round of testing for two minutes). To compare the quality of the chest compressions, data were analyzed using mannequins (Resusci Anne Q-CPR, Laerdal, Norway) and then statistically processed. Results: When chest compressions were administered in the moving rescue boat, an accuracy analysis showed that the pressure speed of the hand and mechanical techniques were normal, h owever, the pressure depth accuracies were 49.04% for manual techniques and 0% for mechanical techniques. The relaxation accuracies during compressions were 2.07% for manual techniques and 95.4% for mechanical techniques. Conclusion: When administering chest compressions in rocking rescue boats, mechanical rather than manual techniques should be preferentially considered.

• 한국응급구조학회지
• /
• 제25권3호
• /
• pp.7-16
• /
• 2021

Purpose: The I-gel device is Korea's most frequently used airway management method during pre-hospital cardiopulmonary resuscitation (CPR). This study aimed to compare changes in ventilation volume according to the fixation method with a simulated manikin. Methods: We placed I-gel into an advanced life support simulator and compared tape and band fixation conditions. CPR was performed according to the 2020 Korean CPR guidelines, using a mechanical chest compression device and an adult bag. The positional shift of I-gel and the ventilation volume of the simulated manikin were measured after performing CPR for 20 minutes. Five trials were carried out in each setting. Statistical analysis was carried out with SPSS 27.0. P < .05 was considered significant. Results: Positional shift after 20 minutes of CPR was as follows: tape fixation, 7.2 ± 0.2 mm; band fixation, no change, indicating a significant difference between the two groups (p=.003). The mean ventilation volume was tape fixation, 482.63 ± 30.84 mL; band fixation, 544.96 ± 22.98 mL, showing a significant difference (p=.002). Conclusion: When using the I-gel during pre-hospital CPR, using a band-type fixing device with elasticity rather than fixing the tape provides stable and appropriate ventilation by maintaining the fixed position.

• Journal of international Conference on Electrical Machines and Systems
• /
• 제1권2호
• /
• pp.79-84
• /
• 2012

In this paper, a three-phase high-voltage converter (HVC), in which the main structure of each phase is composed of a cascaded PWM rectifier (CPR) and cascaded inverter (CI), is studied. A high-voltage grid is the input of the HVC. In order to ensure proper operation of the HVC, the control method should achieve output voltage sharing (OVS) among the rectifiers in the CPR, OVS among the inverters in the CI, and high power factor. Master-slave direct-current control (MDCC) is used to control the CPR. The ability of the control system to prevent interference is strong when using MDCC. The CI is controlled by three-loop control, which is composed of an outer common-output-voltage loop, inner current loops and voltage sharing loops. Simulation results show low total harmonic distortion (THD) in the HVC input currents and good OVS in both the CPR and CI.

• 한국화재소방학회논문지
• /
• 제24권5호
• /
• pp.142-149
• /
• 2010

심폐소생술이란 인공호흡과 순환보조를 통하여 조직으로의 산소 공급을 유지하여 임상적 사망에서 생물학적 사망으로 진행을 막고, 심장박동과 순환을 회복시켜 환자를 소생시켜주는 술기이다. 심폐소생술이 시행되더라도 모든 심장정지 환자가 소생되는 것은 아니며, 얼마나 신속하고 정확하게 심폐소생술이 시행되었느냐에 따라 환자의 생존률이 결정된다. 현장에서 심장정지가 목격되지 않은 환자는 병원이송 전 현장에서 2분간 5주기 심폐소생술을 수행하고 자동제세동기를 사용하도록 하였고, 목격된 환자에게는 즉시 자동제세동기를 사용할 것을 권장하고 있으며 이후 전문적인 심장구조술이 필요하다. 병원 전 단계에서 119 구급대가 이송한 환자 중 자발순환회복(return of spontaneous circulation, ROSC)되어 이송하는 경우와 전문심장구조술을 시행 하는 경우는 매우 드물다. 현장에서 심장정지가 목격되었으나 심폐소생술이 시행되지 않았고 구급대원이 도착한 후 심폐소생술 시행 및 전문심장구조술로 현장에서 자발순환회복되어 생존퇴원한 1례를 경험하여 문헌고찰과 함께 보고하는 바이다.

• Current Photovoltaic Research
• /
• 제10권4호
• /
• pp.111-115
• /
• 2022

For the high efficiency of the photovoltaic module, a high-output solar cell, which is the basis of photovoltaic power generation, is required. As the light receiving area of the solar cell increases, the light receiving area of the photovoltaic module also increases. Accordingly, recent trend is to use large-area solar cells such as M6 and M8 instead of M2-based solar cells for manufacturing the photovoltaic module and a study on the mechanical stiffness of the module with increased size is required. In this study, a mechanical load test corresponding to IEC-61215 was performed among the reliability tests of large-area photovoltaic modules. In order to confirm the degree to which the mechanical load test affects the photovoltaic module, the output and EL images were checked by sequentially increasing the pressure by 600 Pa at a pressure of 2400 Pa. Also, factors such as output and efficiency of large-area photovoltaic modules were verified through mechanical load testing of actual large-area photovoltaic modules and the rate of change was very small at 1%.