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Depth oh chest compression

Soo Young Jin, Seong Beom Oh, Young Oh Kim
OBJECTIVE: This study aimed to compare the optimal chest compression depth for infants and children with that of adults when the simulated compression depth was delivered according to the current guidelines. METHODS: A total of 467 consecutive chest computed tomography scans (93 infants, 110 children, and 264 adults) were reviewed. The anteroposterior diameter and compressible diameter (CD) for infants and children were measured at the inter-nipple level and at the mid-lower half of the spine for adults...
March 2016: Clin Exp Emerg Med
Je Hyeok Oh, Chan Woong Kim
OBJECTIVE: This study determined if rescuer body weight is a major determinant of chest compression depth (CCD) among novice rescuers by analyzing the results of cardiopulmonary resuscitation (CPR) skill tests among medical students and determined the body weight threshold for those unable to achieve adequate CCD. METHODS: Retrospective analysis of CPR test results was performed. A total of 107 medical students completed the tests, which included 5 cycles of CPR...
September 6, 2016: American Journal of Emergency Medicine
Sung Phil Chung, Tetsuya Sakamoto, Swee Han Lim, Mathew Huei-Ming Ma, Tzong-Luen Wang, Francis Lavapie, Sopon Krisanarungson, Hiroshi Nonogi, Sung Oh Hwang
This paper introduces adult basic life support (BLS) guidelines for lay rescuers of the resuscitation council of Asia (RCA) developed for the first time. The RCA BLS guidelines for lay rescuers have been established by expert consensus among BLS Guidelines Taskforce of the RCA on the basis of the 2015 International Consensus on Cardiopulmonary Resuscitation (CPR) and Emergency Cardiovascular Care Science with Treatment Recommendations. The RCA recommends compression-only CPR for lay rescuers and emphasizes high-quality CPR with chest compression depth of approximately 5cm and chest compression rate of 100-120min(-1)...
August 2016: Resuscitation
Young Sinn Kim, Je Hyeok Oh, Chan Woong Kim, Sung Eun Kim, Dong Hoon Lee, Jun Young Hong
This study compared the effectiveness two-finger chest compression technique (TFCC) performed using the right vs. left hand and the index-middle vs. middle-ring fingers. Four different finger/hand combinations were tested randomly in 30 healthcare providers performing TFCC (Test 1: the right index-middle fingers; Test 2: the left index-middle fingers; Test 3: the right middle-ring fingers; Test 4: the left middle-ring fingers) using two cross-over trials. The "patient" was a 3-month-old-infant-sized manikin...
June 2016: Journal of Korean Medical Science
Yeongtak Song, Youngjoon Chee, Jaehoon Oh, Chiwon Ahn, Tae Ho Lim
BACKGROUND: Recently, there have been attempts to use smartphones and smartwatches as the feedback devices to improve the quality of chest compressions. In this study, we compared chest compression depth feedback accuracy between a smartphone and a smartwatch in a hands-only cardiopulmonary resuscitation scenario, using a manikin with a displacement sensor system. METHODS: Ten basic life support providers participated in this study. Guided by the chest compression depths displayed on the monitor of a laptop, which received data from the manikin, each participant performed 2min of chest compressions for each target depth (35mm and 55mm) on a manikin while gripping a smartphone and wearing a smartwatch...
June 2016: Resuscitation
Jaehoon Oh, Tae Ho Lim, Youngsuk Cho, Hyunggoo Kang, Wonhee Kim, Youngjoon Chee, Yeongtak Song, In Young Kim, Juncheol Lee
PURPOSE: During cardiopulmonary resuscitation (CPR), chest compression (CC) depth is influenced by the surface on which the patient is placed. We hypothesized that training healthcare providers to perform a CC depth of 6-7 cm (instead of 5-6 cm) on a manikin placed on a mattress during CPR in the hospital might improve their proper CC depth. MATERIALS AND METHODS: This prospective randomised controlled study involved 66 premedical students without CPR training. The control group was trained to use a CC depth of 5-6 cm (G 5-6), while the experimental group was taught to use a CC depth of 6-7 cm (G 6-7) with a manikin on the floor...
March 2016: Yonsei Medical Journal
Gun Hee Jung, Je Hyeok Oh, Chan Woong Kim, Sung Eun Kim, Dong Hoon Lee
OBJECTIVE: We evaluated the decrease in chest compression depth during 30 : 2 compression-to-ventilation ratio one-handed chest compression (OHCC) in an out-of-hospital pediatric arrest setting, and whether switching hands every other cycle could maintain compression depth. METHODS: A 5-year-old child-sized manikin was used, and 50 medical students participated in the present study. First, the participants performed 5 min OHCC with a 30 : 2 compression-to-ventilation ratio on the floor (baseline test)...
November 27, 2015: European Journal of Emergency Medicine: Official Journal of the European Society for Emergency Medicine
Sin Ae Cheong, Je Hyeok Oh, Chan Woong Kim, Sung Eun Kim, Dong Hoon Lee
OBJECTIVE: We evaluated the decrease in chest compression depth during continuous one-handed chest compression (OHCC) in an in-hospital paediatric arrest setting, and whether switching hands could delay the decrease in chest compression depth. METHODS: In total, 30 healthcare providers were randomised into groups A and B. Group A performed test 1 (chest compressors alternated hands every 30 s in 2 min of OHCC), followed by test 2 (chest compressors used one hand for 2 min without switching to the other hand) and group B, vice versa...
September 30, 2015: Emergency Medicine Australasia: EMA
Y Song, J Oh, Y Chee, Y Cho, S Lee, T H Lim
Feedback devices have been shown to improve the quality of chest compression during cardiopulmonary resuscitation for patients in the supine position, but no studies have reported the effects of feedback devices on chest compression when the chest is tilted. Basic life support-trained providers were randomly assigned to administer chest compressions to a manikin in the supine, 30° left lateral tilt and 30° semirecumbent positions, with or without the aid of a feedback device incorporated into a smartphone...
November 2015: Anaesthesia
Sanghyun Lee, Jaehoon Oh, Hyunggoo Kang, Taeho Lim, Wonhee Kim, Youngjoon Chee, Yeongtak Song, Chiwon Ahn, Jun Hwi Cho
PURPOSE: Feedback devices are used to improve chest compression (CC) quality related to survival rates in cardiac arrest. However, several studies have shown that feedback devices are not sufficiently reliable to ensure adequate CC depth on soft surfaces. Here, we determined the proper target depth of feedback (TDF) using an accelerometer during cardiopulmonary resuscitation in hospital beds. METHODS: In prospective randomized crossover study, 19 emergency physicians performed CCs for 2 minutes continuously on a manikin in 2 different beds with 3 TDFs (5, 6, and 7 cm)...
October 2015: American Journal of Emergency Medicine
Min Hee Jung, Je Hyeok Oh, Chan Woong Kim, Sung Eun Kim, Dong Hoon Lee, Wen Joen Chang
OBJECTIVE: We investigated whether visual feedback from an accelerometer device facilitated high-quality chest compressions during an in-hospital cardiac arrest simulation using a manikin. METHODS: Thirty health care providers participated in an in-hospital cardiac arrest simulation with 1 minute of continuous chest compressions. Chest compressions were performed on a manikin lying on a bed according to visual feedback from an accelerometer feedback device. The manikin and accelerometer recorded chest compression data simultaneously...
August 2015: American Journal of Emergency Medicine
Je Hyeok Oh, Sung Eun Kim, Chan Woong Kim, Dong Hoon Lee
OBJECTIVE: Because the one-handed chest compression (OHCC) technique uses one hand, unlike the two-handed chest compression (THCC) technique, compression depth might be reduced more rapidly in OHCC than THCC. The present study was conducted to determine whether compression depth was affected within 2 min after the start of OHCC in a simulated in-hospital paediatric arrest model. METHODS: Forty medical doctors performed continuous OHCC on a child manikin lying on a hard floor using a CPRmeter for 2 min...
April 2015: Emergency Medicine Australasia: EMA
Choong Hyun Jo, Hwan Suk Jung, Gyu Chong Cho, You Jang Oh
OBJECTIVE: To determine if the over-the-head two-thumb encircling technique (OTTT) provides better quality cardiopulmonary resuscitation (CPR) than the conventional two-finger technique (TFT) when performed by a lone rescuer in an in-hospital infant cardiac arrest setting. METHODS: This prospective, randomised crossover design study recruited 50 nurses who voluntarily performed lone rescuer infant CPR for 2 min on a manikin. Participants who performed OTTT stood at the head of the manikin to compress the chest and provide bag-valve mask ventilations, whereas those who performed TFT stood by the side of the manikin to compress the chest and provide pocket-mask ventilations...
September 2015: Emergency Medicine Journal: EMJ
Yeongtak Song, Jaehoon Oh, Youngjoon Chee
BACKGROUND: Although many smartphone application (app) programs provide education and guidance for basic life support, they do not commonly provide feedback on the chest compression depth (CCD) and rate. The validation of its accuracy has not been reported to date. This study was a feasibility assessment of use of the smartphone as a CCD feedback device. In this study, we proposed the concept of a new real-time CCD estimation algorithm using a smartphone and evaluated the accuracy of the algorithm...
January 2015: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
Jaehoon Oh, Youngjoon Chee, Taeho Lim, Youngsuk Cho, In Young Kim
PURPOSE: We suggest an alternative chest compression (CC) in kneeling posture using a 'kneeling stool' on which the performer kneels beside the patient on a bed in-hospital. In kneeling posture, we can maintain high quality cardiopulmonary resuscitation (CPR) without the bed height adjustment, which is necessary and inconvenient in standing posture. METHODS: This study is a randomised crossover trial with 38 participants working in one ED. The first group knelt on the kneeling stool beside a manikin placed on a bed, whereas the second group stood on a step stool with the manikin at knee level using bed height adjustment...
December 2014: Emergency Medicine Australasia: EMA
Je Hyeok Oh, Chan Woong Kim, Sung Eun Kim, Dong Hoon Lee, Sang Jin Lee
BACKGROUND: Pediatric resuscitation guidelines do not specify which hand to use for one-handed cardiopulmonary resuscitation (CPR). OBJECTIVE: To determine whether there is a difference in the quality of one-handed chest compressions (OHCCs) using the dominant versus non-dominant hand in simulated paediatric CPR. MATERIALS AND METHODS: 41 doctors took part in the study. Chest compressions were alternately performed with the dominant (test 1) and non-dominant hand (test 2) in a random order at 30 min intervals...
July 2015: Emergency Medicine Journal: EMJ
Yeongtak Song, Jaehoon Oh, Taeho Lim, Youngjoon Chee
In order to ensure that high-quality cardio-pulmonary-resuscitation (CPR) is performed, many kinds of feedback devices have been developed that are helpful for achieving correct chest compression (CC) in manikin studies. However, the mattress compression depth (MCD) can cause overestimation of chest compression depth (CCD) during CPR using a feedback device. Herein, we propose a new method using a vinyl cover that encloses the foam mattress and is compressed by vacuum pump just before performing CPR, which could increase the performance of CCs during CPR...
2013: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Je Hyeok Oh, Chan Woong Kim, Sung Eun Kim, Sang Jin Lee, Dong Hoon Lee
BACKGROUND: When rescuers perform cardiopulmonary resuscitation (CPR) from a standing position, the height at which chest compressions are carried out is raised. OBJECTIVE: To determine whether chest compressions delivered on a bed adjusted to rescuer's knee height are as effective as those delivered on the floor. MATERIALS AND METHODS: A total of 20 fourth-year medical students participated in the study. The students performed chest compressions for 2 min each on a manikin lying on the floor (test 1) and on a manikin lying on a bed (test 2)...
April 16, 2013: Emergency Medicine Journal: EMJ
Jaehoon Oh, Hyunggoo Kang, Youngjoon Chee, Taeho Lim, Yeongtak Song, Youngsuk Cho, Sangmo Je
No study has examined the effectiveness of backboards and air deflation for achieving adequate chest compression (CC) depth on air mattresses with the typical configurations seen in intensive care units. To determine this efficacy, we measured mattress compression depth (MCD, mm) on these surfaces using dual accelerometers. Eight cardiopulmonary resuscitation providers performed CCs on manikins lying on 4 different surfaces using a visual feedback system. The surfaces were as follows: A, a bed frame; B, a deflated air mattress placed on top of a foam mattress laid on a bed frame; C, a typical air mattress configuration with an inflated air mattress placed on a foam mattress laid on a bed frame; and D, C with a backboard...
February 2013: Journal of Korean Medical Science
Jaehoon Oh, Youngjoon Chee, Yeongtak Song, Taeho Lim, Hyunggoo Kang, Youngsuk Cho
BACKGROUND: Mattress compression causes feedback devices to over-estimate the chest compression depth measurement during CPR. We propose a novel method to decrease the mattress compression using a vinyl cover. This mattress compression cover encloses the foam mattress and is compressed by a vacuum pump immediately prior to performing CPR. METHODS: Nine CPR providers performed chest compressions on manikins placed on a conventional foam mattress on a bed frame (surface CONV), a backboard and foam mattress on a bed frame (surface BB), and a foam mattress, compressed with a vacuum pump, on a bed frame (surface VAC)...
July 2013: Resuscitation
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