• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 1994년도 Proceedings of the Korea Automatic Control Conference, 9th (KACC) ; Taejeon, Korea; 17-20 Oct. 1994
• /
• pp.100-105
• /
• 1994

In this paper, we discuss a method for design of an ambulance stretcher which call decrease blood pressure fluctuation caused by ambulance acceleration. Recently, a lot of stretchers which can isolate the vertical vibration to reduce body resonances (4-10 Hz) have been used during ambulance transport. However, we have found that blood pressure of a patient laying in the stretcher fluctuates when the ambulance accelerates or decelerates. Since the enforced change of the blood pressure may deteriorate the patent's condition, a stretcher to cancel head-to-foot acceleration and to decrease the blood pressure variation (BPV) is expected for safe transport. We propose a method to design a stretcher which is tilted according to an adequate angle to cancel head-to-foot acceleration by gravity when the ambulance accelerates or decelerates. A control method of the stretcher is constructed by means of simulation analysis using acceleration data measured during ambulance transport. It is confirmed that the active controlled stretcher proposed has good performance for the BPV reduction.

• 한국응급구조학회지
• /
• 제23권1호
• /
• pp.101-112
• /
• 2019

Purpose: The purpose of the study was to contribute to the prevention of musculoskeletal disorders (MSDs) in 119 emergency medical technicians (EMTs) by evaluating ergonomic risk factors of patient lifting work-postures. Methods: Four procedures were evaluated: using long back-board (LBB) on the sitting and standing main stretcher, using variable stretcher on the sitting and standing main stretcher. Wok-postures were assessed during training. Results: In using LBB on the sitting main stretcher, the OWAS-score was Mode:3 (Mean:2.30, Maximum:3), the REBA-score was Mode:9 (Mean:7.61, Maximum:11), requiring improvement soon. In using LBB on the standing main stretcher, the OWAS-score was Mode:3 (Mean:2.33, Maximum:3), requiring as soon as possible corrective action, the REBA-score was Mode:6 (Mean:5.44, Maximum:11), requiring improvement. In using variable stretcher on the sitting main stretcher, the OWAS-score was Mode:1 (Mean:1.85, Maximum:3), not requiring corrective action, the REBA-score was Mode:6 (Mean:6.78, Maximum:11), requiring improvement. In using variable stretcher on the standing main stretcher, the OWAS-score was Mode:3 (Mean:2.84, Maximum:3), requiring as soon as possible corrective action, the REBA-score was Mode:11 (Mean:9.38, Maximum:11), requiring immediate improvement. Conclusion: All four-procedures showed improvement in work-posture. Thereby, required attention and management in training, occupational health professionals should participate in change of lifting-method, and programs aimed at preventing MSDs should be developed and implemented in fire-academy and fire-station.

• EDISON SW 활용 경진대회 논문집
• /
• 제5회(2016년)
• /
• pp.256-261
• /
• 2016

In this paper, Shape optimal design for a chair with 4 legs and 2 stretchers consisting of stainless steel was conducted. The shape was transformed by identifying stress and deformation for the part of leg and stretcher. In addition, load condition and mesh was designed using Hypermesh. The stress analysis was carried out using CSD_Elast that is one of EDISON program. In seat test, Maximum equivalent stress was showed at the contact part between seat and legs. As a result, a leg cross-section with rectangular and arch was designed. And optimal height of stretcher was found to reduce a deformation. Also, maximum deformation was reduced by designing a stretcher with ellipse cross-section. So, Optimal chair having 4 legs with rectangular cross section and 2 stretchers with ellipse cross section was shown to satisfy the safety ratio.

• 광산업정보
• /
• 통권1호
• /
• pp.61-61
• /
• 2000

• 한국안전학회지
• /
• 제29권6호
• /
• pp.125-131
• /
• 2014

The purpose of this study is to investigate the effect of high quality CPR using the 4 types of rescue device equipment and chest compressions energy measurement in pre-hospital settings. So, we used the mode to insert load cell in ALS Skill master Manikin to develop CFMM(Compression Force Measurement Manikin) on main stretcher, CPR board, long spine board, scoop stretcher and floor. And, our research team could know that the main stretcher needed average force of 32.55 (${\pm}1.01$) kg, CPR board of 27.23 (${\pm}1.08$) kg, long spine board of 27.13 (${\pm}1.18$) kg, Scoop Stretcher of 27.38 (${\pm}1.05$) kg and Floor of 27.24 (${\pm}0.93$) kg. CPR board must be necessary in the case of CPR on main stretcher in a moving ambulance. But if the condition of patient's back surface is the removable stretcher and the long spine plate, the patient doesn't have to be spent time to use a CPR board. Furthermore, this research suggests to consider that how to take advantage of the education to students for the equipment to check in real time the energy(kg) requirement of chest compressions.

• 한국컴퓨터정보학회논문지
• /
• 제29권5호
• /
• pp.123-129
• /
• 2024

구급대원에게 심폐소생술은 매우 중요하나 이동하는 주들것에서 수행하는 가슴압박은 정확도가 떨어진다. 이 연구의 목적은 이동 중 주들것에서 수행하는 심폐소생술 효과를 높이기 위하여 C-step을 이용하여 주들것의 측면에서 가슴압박을 수행하는 것과 환자의 복부 위에 위치하여 가슴 압박을 수행하는 것에 대하여 차이를 알아보고자 수행되었다. 연구는 C-step 군 20명과 복부 위군 20명을 대상으로 이동 중 주들것에서 2분간 연속된 가슴압박을 수행하였다. 연구결과 C-step을 적용한 군에서 적정한 깊이(t=4.132, p=.000)와 속도(t=7.177, p=.000)를 나타내었으며 정확도가 더 높은 것으로 나타났다(t=6.774, p=.000). 또한 C-step을 적용한 군에서 위치불량(t=-5.197, p=.008)과 너무 얕은 오류가 적은 것으로 나타났다. 결론적으로 C-step을 장착한 주들것에서의 가슴압박은 심폐소생술의 질을 높이고 병원 전 환자의 생존율을 높이는데 도움을 줄 것으로 판단된다.

• 소성∙가공
• /
• 제24권4호
• /
• pp.241-247
• /
• 2015

In order to prevent shape defects such as fluting and stretcher strains during press forming of aged low carbon steel sheets, roller leveling conditions for reducing yield point elongation were studied. Yield point elongations of leveled sheets were determined as a function of leveling, which is defined as the plastic fraction or the ratio of plastically deformed part in sheet thickness section to the whole thickness of the sheet. By adjusting this plastic fraction during leveling to more than 78%, yield point elongation in the leveled sheets was reduced so no fluting occurred during subsequent tangential bending. Stretcher strains can be avoided by leveling the sheet to an 84% plastic fraction condition.

• 한국산학기술학회논문지
• /
• 제13권12호
• /
• pp.5950-5957
• /
• 2012

흉부압박의 중단을 최소화하는 심폐소생술은 환자의 생존율 향상을 위한 중요한 요소이다. 본 연구의 목적은 이동 중 주들것에서 보조발판(C-step) 장착 여부에 따른 심폐소생술 정확도 및 오류를 파악하는 데 있다. 연구대상자는 C도 10개 소방서에 근무하고 있는 1급 응급구조사 70명(대조군 35명, 실험군 35명)으로 주들것에서 심폐소생술 정확도가 측정되었다. 연구결과 C-step을 적용한 주들것에서 심폐소생술은 적절한 흉부압박 높이와 안정된 자세를 제공해 흉부압박 정확도를 높이고(t=65.104, p=.000), 인공호흡 시 적절한 환기량을 공급하여 인공호흡 정확도를 높이며(t=5.207, p=.000) 심폐소생술 자신감 또한 향상시키는 것으로 나타났다(t=-10.612, p=.000). 결론적으로 주들것에 C-step 장착은 고품질의 심폐소생술(high quality CPR)을 충실히 수행해 심정지 환자의 생존율을 높이는데 도움이 될 것으로 사료된다.

• 융복합기술연구소 논문집
• /
• 제7권1호
• /
• pp.7-10
• /
• 2017

In general, the shoe stretcher is utilized to stretching the leather of shoe upper in the longitudinal direction. In the capstone design class, we tried to make a shoe leather stretcher for the ball of foot. Since a natural cow leather was recovered in length according to relaxation time after stretched, it was difficult to predict the initial amount of set up of stretching. In this paper, tensile and relaxation experiments were conducted in order to predict the amount of initial stretching for appropriate tensile length. Apparatus of leather stretching was designed and strains of leather were measured according to relaxation times of 12, 18, 24 hours after stretching of 24 hours. It was revealed that the ratio of the final relaxed strain and the initial applied strain was about 0.404 with R-square of 0.990 for a shoe cow leather.

• 한국응급구조학회지
• /
• 제27권3호
• /
• pp.33-46
• /
• 2023

Purpose: This study aims to evaluate the risk of work-related musculoskeletal disorders (WMSDs) in 119 EMT during patient-carrying tasks using a long backboard (LBB) and a variable stretcher. Methods: Manikins were used as patients, and 45 new 119 EMT from K Fire Academy were filmed performing patient-carrying tasks on stairs. The tasks were analyzed using Ovako working posture analysis system (OWAS) and Rapid entire body assessment (REBA). Results: In using LBB, the OWAS score was Mode 3(Mean 2.37, Maximum 3), requiring as soon as possible corrective action, the REBA score was Mode 11(Mean 9.16, Maximum 11), requiring immediate improvement. In using variable stretcher, the OWAS score was Mode 1(Mean 2.33, Maximum 3), non-necessity for corrective action, the REBA score was Mode 9(Mean 8.0, Maximum 11), requiring as soon as possible. Conclusion: In conclusion, improvement was needed in one task (carrying a patient using a LBB) in the OWAS and in two tasks (carrying a patient using a LBB, carrying a patient using a variable stretcher) in the REBA. Thereby, required attention and management of WMSDs during training. In addition, it is essential to carry out objective and quantitative assessments through ergonomic analysis by occupational health professionals when designing future training programs to prevent WMSDs.