Sternal Force-Displacement Relationship During Cardiopulmonary Resuscitation

1993 ◽  
Vol 115 (2) ◽  
pp. 195-201 ◽  
Author(s):  
K. G. Gruben ◽  
A. D. Guerci ◽  
H. R. Halperin ◽  
A. S. Popel ◽  
J. E. Tsitlik
Keyword(s):  
Cyclic Loading ◽  
Cardiopulmonary Resuscitation ◽  
Dynamic Response ◽  
Elastic Properties ◽  
Clinical Data ◽  
Viscoelastic Model ◽  
Damping Properties ◽  
Cpr Training ◽  
Force Displacement

A viscoelastic model is presented to describe the dynamic response of the human chest to cyclic loading during manual cardiopulmonary resuscitation (CPR). Sternal force and displacement were measured during 16 clinical resuscitation attempts and during compressions on five CPR training manikins. The model was developed to describe the clinical data and consists of the parallel combination of a spring and dashpot. The human chests’ elastic and damping properties were both augmented with increasing displacement. The manikins’ elastic properties were stiffer and both elastic and damping properties were less dependent on displacement than the humans’.

Evaluation of Nonlinear Damping Properties of Magnetorheological Gels Under Shear Loading

2013 ◽  
Author(s):  
Yotsugi Shibuya ◽  
Hiroshi Nasuno ◽  
Hirohisa Sakurai ◽  
Katsuaki Sunakoda
Keyword(s):  
Magnetic Field ◽  
Dynamic Response ◽  
Hysteresis Loop ◽  
Viscoelastic Model ◽  
Shear Loading ◽  
Material System ◽  
Damping Properties ◽  
Stress Strain ◽  
Nonlinear Viscoelastic ◽  
Nonlinear Viscoelastic Model

Rheological properties of magnetorheological gels can be changed reversibly by applied magnetic fields. Magnetorheological gels with different material system are characterized the dynamic response of the material by shearing test in magnetic field. Nonlinear behavior is observed in the dynamic response of the material. To understand mechanism of the behavior, dynamic properties of magnetorheological gels are evaluated by experiment and nonlinear viscoelastic model. Magnetorheological gels used in this study consist of three types of paramagnetic particles and a cyclic-poly-siloxane gel matrix. Three material systems of magnetic particles are chosen: Fe-Si-Ni, Si-Fe and Fe-Si-B-Cr types. Shear testing is conducted in magnetic field 0mT, 105mT and 211mT. The stress-strain response under shear deformation is characterized by non-ellipsoidal hysteresis loop due to nonlinearity of the response. To identify the nonlinear properties, analysis in frequency domain is applied to identify the dynamic response of the material. Nonlinear viscoelastic model with high order components is made and phenomenon of the non-ellipsoidal hysteresis loop in the stress-strain relation and damping properties are illustrated.

scholarly journals Attitudes and willingness toward out-of-hospital cardiopulmonary resuscitation: a questionnaire study among the public trained online in China

BMJ Open ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. e038712
Author(s):  
Yi Jiang ◽  
Bangsheng Wu ◽  
Long Long ◽  
Jiaxing Li ◽  
Xiaoqing Jin
Keyword(s):  
Cardiopulmonary Resuscitation ◽  
Disease Transmission ◽  
Public Attitudes ◽  
Online Training ◽  
First Aid ◽  
The Public ◽  
Close Family Member ◽  
Positive Attitudes ◽  
Bystander Cardiopulmonary Resuscitation ◽  
Cpr Training

ObjectivesThe incidence of bystander cardiopulmonary resuscitation (CPR) is low in China. CPR training could improve public attitudes and willingness, but at present, the attitudes of the public after online training are unclear. This study investigated individual attitudes towards CPR, the willingness to perform it in emergencies along with the main obstacles and the overall effects of online training.DesignQuestionnaires were distributed to investigate the public attitudes and willingness towards performing bystander CPR.SettingQuestionnaires were accessible after the online course ‘First Aid’.Participants1888 students who attended ‘First Aid’ from December 2019 to 1 January 2020 and then completed the questionnaire voluntarily.ResultsThe majority understood CPR (96.7%) and displayed a willingness to learn (98.4%) and to disseminate CPR knowledge (82.0%). Characteristics associated with more positive attitudes included women, the 26–35-year olds and those in medical-related occupations (p<0.05). Only 34.8% had CPR training before. Most people would willingly perform CPR on a close family member. Compared with the standard CPR (S-CPR), the public preferred chest compression-only CPR (CO-CPR) (p<0.01). The top three obstacles to performing CO-CPR were lack of confidence (26.7%), fear of harming the victim (23.4%) and causing legal trouble (20.7%), while regarding S-CPR, fear of disease transmission (22.9%) ranked second. Women, those in poor health and in medical-related occupations, were more likely to perform CPR (p<0.05). The confidence to perform CPR was improved remarkably after online training (p<0.05).ConclusionsThe overwhelming majority of respondents showed positive attitudes and willingness towards CPR. In some cases, there is still reluctance, especially towards S-CPR. Obstacles arise mainly due to lack of confidence in administering CPR, while online CPR training can markedly improve it. Therefore, we should focus on disseminating CPR knowledge, targeting those who are less willing to perform CPR and helping overcome their obstacles by online training.

scholarly journals Knowledge, training and willingness to perform bystander cardiopulmonary resuscitation among university students in Chongqing, China: a cross-sectional study

BMJ Open ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. e046694
Author(s):  
Jiani Mao ◽  
Feng Chen ◽  
Dianguo Xing ◽  
Huixian Zhou ◽  
Ling Jia ◽  
...  
Keyword(s):  
College Students ◽  
Cardiopulmonary Resuscitation ◽  
Cross Sectional Study ◽  
Average Score ◽  
Willingness To Participate ◽  
Sectional Study ◽  
Cross Sectional ◽  
Bystander Cpr ◽  
Secondary Outcomes ◽  
Cpr Training

ObjectiveTo evaluate knowledge of cardiopulmonary resuscitation (CPR) among Chinese college students and their attitude towards participating in CPR training and willingness to perform bystander CPR.DesignA cross-sectional study.ParticipantsA total of 1128 college students were selected through a multistage stratified random sampling method from 12 universities in Chongqing, China.Primary and secondary outcomesPrimary outcomes included CPR knowledge and willingness to participate in training and perform bystander CPR; secondary outcomes included CPR training experience and obstacles to training and performing CPR.ResultsThe average score on CPR knowledge was 2.078 (±1.342). Only 45.5% of the respondents were willing to participate in CPR training. Women, respondents who were postgraduate or above, with liberal arts as major and with high CPR knowledge level were more willing to participate in CPR training. A total of 47.2% of the respondents were willing to provide simple assistance, such as checking the consciousness and breathing of the patient and dialling 120 (medical emergency call). Only 34.1% indicated their willingness to perform bystander CPR on strangers. Perceived behavioural control, behavioural attitudes and subjective norms are positive predictors of willingness to provide bystander CPR.ConclusionsCPR knowledge and training rate were low among Chongqing college students. Willingness to participate in training and perform bystander CPR was also low. Improving legislation, strengthening training programmes, incorporating CPR training into the school curriculum and reshaping the social and public culture of offering timely help to those in need are recommended strategies to improve bystander CPR performance.

scholarly journals Virtual reality cardiopulmonary resuscitation (CPR): Comparison with a standard CPR training mannequin

Resuscitation ◽  
2019 ◽  
Vol 135 ◽  
pp. 234-235 ◽  
Author(s):  
Federico Semeraro ◽  
Giuseppe Ristagno ◽  
Gabriele Giulini ◽  
Tania Gnudi ◽  
Jihan Samira Kayal ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Cardiopulmonary Resuscitation ◽  
Cpr Training

scholarly journals Cardiopulmonary resuscitation: knowledge amongst Nepalese health personnel

2016 ◽  
Vol 3 (1) ◽  
pp. 25-30
Author(s):  
M Amatya ◽  
B Gorkhali
Keyword(s):  
Cardiopulmonary Resuscitation ◽  
Life Support ◽  
Clinical Group ◽  
Cross Sectional ◽  
Academic Degree ◽  
Medical College ◽  
Correct Sequence ◽  
Clinical Background ◽  
Health Institutions ◽  
Cpr Training

Background and Objectives: The role of effective basic life support (BLS) and cardiopulmonary resuscitation (CPR) is established. Reports on CPR knowledge assessment in Nepal are few and underline the gross lack of CPR knowledge.Material and Methods: A cross-sectional descriptive study was conducted among residents, students, and teachers in a few Nepalese health institutions. A questionnaire based on BLS guidelines 2010 was used, incorporating total 30 questions.Results: Total 145 complete responses (63 females, 82 males) were obtained and analyzed. Mean and median of correct answers was 18 out of 30 (60%, range 3-26); 9% could identify the correct sequence of action from a given set of 7 CPR steps. By ANOVA, score correlated significantly with the background of person (scores highest 19 in ‘clinical’ group and 18 in ‘dentistry’ to 16.38 in ‘nursing’ and 15.09 in ‘non-clinical’; p=0.000) but not with other variables (sex, age, designation, academic degree, institution, and previous CPR training).Conclusion: Lack in CPR knowledge and awareness are reported worldwide. Findings of this study are similar. Although those with clinical background had better knowledge, poor correlations with other variables indicate lack of importance being given to CPR knowledge and skill by most people, even those working in big health institutions of the country.Janaki Medical College Journal of Medical Sciences (2015) Vol. 3 (1):25-30

scholarly journals Current Status of Knowledge about Cardiopulmonary Resuscitation among the University Students in the Northern Region of Saudi Arabia

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Abdulmajeed Owaid Alsharari ◽  
Abdulrahaman Alduraywish ◽  
Ekremah Ali Al-Zarea ◽  
Naif Ibrahim Salmon ◽  
Md Sayed Ali Sheikh
Keyword(s):  
Saudi Arabia ◽  
Cardiac Arrest ◽  
Cardiopulmonary Resuscitation ◽  
University Students ◽  
Northern Region ◽  
Current Status ◽  
Major Public Health Problem ◽  
Knowledge And Attitude ◽  
The University ◽  
Cpr Training

Background. Sudden cardiac arrest is a major public health problem in the world. Immediate initiation of high-quality cardiopulmonary resuscitation (CPR) significantly increased patient survival rate. Therefore, it is very important to train young people and increase public awareness of CPR for the long-term benefit of the community. Objective. We aimed at estimating the level of knowledge and attitude towards cardiopulmonary resuscitation (CPR) among the university students in the northern region of Saudi Arabia. Methodology. A cross-sectional, prospective study was conducted among the students of four northern region universities of Saudi Arabia (Jouf, Hail, Northern Borders, and Tabuk) between March and November 2017. A self-administered questionnaire was prepared in both Arabic and English languages and distributed to all the participants. All the data were collected and analyzed by using SPSS version 21. Results. A total of 947 students from four universities completed the questionnaire: Jouf (57%), Hail (15%), Northern Borders (13%), and Tabuk (15%). Although 72% of students have previous knowledge about CPR, 49% of them lack knowledge about a medical emergency. Moreover, 59% failed to answer regarding CPR where only 41% wrote the ABC steps in the correct sequence. However, 67% of the participants had very poor knowledge, 89% of participants desired to receive additional CPR training course, and 49% of the students thought that CPR training should be a mandatory graduation requirement for all universities. There were no significant differences between male and female students. Students from medicine-related colleges have significantly (p<0.001) more knowledge and scored better compared with non-medicine-related colleges. Tabuk University scored better compared to the others, but the overall knowledge and attitude scored were low. Conclusions. Overall knowledge about CPR among the university students was not satisfactory; however, attitude towards CRP training was very positive. Our results suggested that there is a need for improvement of CPR education among Saudi university students, which will help to reduce the cardiac arrest mortality rate among the community.

Role of Dominant Hand Position during Chest Compression by Novice Rescuers: An Observational Simulation Study

2014 ◽  
Vol 21 (6) ◽  
pp. 382-386 ◽  
Author(s):  
Ch Jo ◽  
Jh Ahn ◽  
Yd Shon ◽  
Gc Cho
Keyword(s):  
Hong Kong ◽  
Cardiopulmonary Resuscitation ◽  
Training Program ◽  
Chest Compression ◽  
Simulation Study ◽  
Hand Position ◽  
Dominant Hand ◽  
Cpr Training

Introduction The aim of this study was to determine the effect of hand positioning on the quality of external chest compression (ECC) by novice rescuers. Methods This observational simulation study was conducted for 117 included participants. After completion of an adult cardiopulmonary resuscitation (CPR) training program for 3-h, the participants selected which of their hands would be in contact with the mannequin during ECC and performed 5 cycles of single rescuer CPR on a recording mannequin. The participants were assigned to 2 groups: the dominant hand group (DH; n=40) and the non-dominant hand group (NH; n=29). The depth and rate of ECC were analysed to compare the effectiveness of ECC between 2 groups. Results The rate of ECC was significantly faster in the DH group (mean, 117.3 ±11.4/min) than in the NH group (mean, 110.9±12.2/min) (p=0.028). However, the depth of ECC in the dominant hand group (mean, 52.4±5.9 mm) was not significantly different from that in the non-dominant hand group (mean, 50.8±6.0 mm) (p=0.287). Similarly, the portion of ECC with inadequate depth in the dominant hand group (mean, 1.8±4.3%) was not significantly different from that in the non-dominant hand group (mean, 5.3±15.6%) (p=0.252). Conclusions ECC can be performed with an acceptably higher rate of compressions when the dominant hand of the novice rescuer is placed in contact with the sternum. However, the position of the dominant hand does not affect the depth of ECC. (Hong Kong j.emerg.med. 2014;21:382-386)

scholarly journals Open Online Course on Basic Cardiopulmonary Resuscitation: Investigation of an Audience and the Effects of Distant Training

2020 ◽  
Vol 16 (2) ◽  
pp. 52-63 ◽  
Author(s):  
A. A. Birkun ◽  
V. R. Dantanarayana
Keyword(s):  
Medical Education ◽  
Cardiac Arrest ◽  
Cardiopulmonary Resuscitation ◽  
First Aid ◽  
Online Course ◽  
Massive Open Online ◽  
Massive Open Online Course ◽  
Level Of Knowledge ◽  
Cpr Training ◽  
Previous Training

Aim. To study the demand for the massive open online course on basic cardiopulmonary resuscitation (CPR), and to evaluate effects of the training based on the socio-demographic profile of the audience.Material and methods. The data obtained from a survey conducted on participants of the online course «First Aid in Cardiac Arrest (Basic Resuscitation)» during a one-year period (07.2018–07.2019) were analyzed, including demographic data, initial and final levels of knowledge on CPR, and willingness to resuscitate a stranger. The 5-point Lickert scale was used for self-assessment of knowledge and willingness to attempt CPR.Results. The analysis includes data collected from 11,924 people, out of which 3,445 (29%) have completed the training. Eighty percent of participants live in the Russian Federation. The mean age of trainees, who completed the course, was 25.7 years, 45% of them were males, 42% had learnt CPR previously, 12% had medical education. As a result of the training, a significant increase (P<0.001) in the willingness to attempt CPR (from 3.26 to 4.16 points) and an increase in self-perceived CPR knowledge (from 2.24 to 3.98 points) were registered. The percentage of trainees who expressed a high level of willingness to perform CPR (4–5 points) increased from 44% to 81% (P<0.001). The course was more likely to be completed by those trainees who had previous training in CPR (p<0.001), who initially demonstrated higher willingness to provide CPR (P=0.003) or a higher level of knowledge in CPR (P<0.001). Trainees who had previous CPR training showed a much higher level of knowledge, higher self-confidence and a higher level of readiness to provide CPR (P<0.001). Approximately 14% of trainees with medical education reported having no previous training in CPR.Conclusions. The massive open online course promotes knowledge of CPR and serves as an important tool for increasing the willingness of lay people to provide first aid in case of cardiac arrest. Previous CPR training is a motivating factor to continue education in resuscitation.

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