scholarly journals Low-dose, high-frequency CPR training with feedback for firefighters

2019 ◽  
Vol 8 (1) ◽  
pp. 64-72 ◽  
Author(s):  
Anna Abelsson ◽  
Jari Appelgren ◽  
Christer Axelsson
Keyword(s):  
Cardiopulmonary Resuscitation ◽  
High Frequency ◽  
Design Methodology ◽  
Low Dose ◽  
Compression Depth ◽  
Content Type ◽  
Objective Feedback ◽  
Volume Compression ◽  
Cpr Training ◽  
Post Assessment

Purpose The purpose of this paper is to investigate the effects of the intervention of low-dose, high-frequency cardiopulmonary resuscitation (CPR) training with feedback for firefighters for one month. Design/methodology/approach The study had a quantitative approach. Data were collected through an intervention by means of simulation. The data collection consisted of a pre- and post-assessment of 38 firefighter’s CPR performance. Findings There was a statistically significant improvement from pre- to post-assessment regarding participants’ compression rates. Compression depth increased statistically significantly to average 2 mm too deep in the group. Recoil decreased in the group with an average of 1 mm for the better. There was a statistically significant improvement in participants’ ventilation volume from pre- to post-assessment. Originality/value Prehospital staff such as firefighters, police, and ambulance perform CPR under less than optimal circumstances. It is therefore of the utmost importance that these professionals are trained in the best possible way. The result of this study shows that low-dose, high-frequency CPR training with an average of six training sessions per month improves ventilation volume, compression depth, rate, and recoil. This study concludes that objective feedback during training enhances the firefighters’ CPR skills which in turn also could be applied to police and ambulance CPR training.

scholarly journals Enhanced self-assessment of CPR by low-dose, high-frequency training

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Anna Abelsson ◽  
Jari Appelgren ◽  
Christer Axelsson
Keyword(s):  
Visual Feedback ◽  
High Frequency ◽  
Low Dose ◽  
Compression Rate ◽  
Multiple Choice Questions ◽  
Self Assessment ◽  
Content Type ◽  
Good Ability ◽  
Cpr Quality ◽  
Cpr Training

PurposeThe purpose was to investigate what effect an intervention of low-dose, high-frequency cardiopulmonary resuscitation (CPR) training with feedback for one month would have on professionals' subjective self-assessment skill of CPR.Design/methodology/approachThis study had a quantitative approach. In total, 38 firefighters performed CPR for two minutes on a Resusci Anne QCPR. They then self-assessed their CPR through four multiple-choice questions regarding compression rate, depth, recoil and ventilation volume. After one month of low-dose, high-frequency training with visual feedback, the firefighters once more performed CPR and self-assessed their CPR.FindingsWith one month of low-dose, high-frequency training with visual feedback, the level of self-assessment was 87% (n = 33) correct self-assessment of compression rate, 95% (n = 36) correct self-assessment of compression depth, 68% (n = 26) correct self-assessment of recoil and 87% (n = 33) correct self-assessment of ventilations volume. The result shows a reduced number of firefighters who overestimate their ability to perform CPR.Originality/valueWith low-dose, high-frequency CPR training with visual feedback for a month, the firefighters develop a good ability to self-assess their CPR to be performed within the guidelines. By improving their ability to self-assess their CPR quality, firefighters can self-regulate their compression and ventilation quality.

Recent civil and criminal enforcement action involving high frequency trading

2015 ◽  
Vol 16 (1) ◽  
pp. 5-12 ◽  
Author(s):  
Matthew Rossi ◽  
Greg Deis ◽  
Jerome Roche ◽  
Kathleen Przywara
Keyword(s):  
High Frequency ◽  
Design Methodology ◽  
High Frequency Trading ◽  
Content Type ◽  
Enforcement Action ◽  
The Past ◽  
Trading Patterns ◽  
Federal Prosecutor ◽  
Enforcement Activity ◽  
Practical Implications

Purpose – To alert high frequency trading firms to the increased regulation and prosecution of manipulative trading practices during 2014 and early 2015. Design/methodology/approach – Reviews four significant proceedings against high frequency trading firms (and/or individuals employed by such firms) and other developments from the relevant government agencies as a possible preview of the enforcement and prosecution of high frequency trading practices in 2015. Provides advice to high frequency trading firms on how to decrease the risk of regulatory or criminal actions against them in this changing environment. Findings – Although the focus on high frequency trading has only recently begun to intensify, firms should be aware of the increased enforcement activity of the past year. These actions, both regulatory and criminal, have already resulted in large penalties and have helped initiate a strengthening of rules and regulations regarding manipulative trading practices, of which firms need to be aware and stay current. Practical implications – High frequency trading firms should be aware of the recent regulatory and criminal actions in order to better evaluate their own practices and controls, to ensure that their trading patterns do not resemble manipulative practices, and to avoid similar actions. Originality/value – Practical guidance from experienced litigators and securities regulatory lawyers, including a former SEC Assistant Chief Litigation Counsel and a former federal prosecutor, that consolidates and describes several recent actions and developments in one piece.

Abstract 250: Effect of Coaching on Dispatch-assisted Cardiopulmonary Resuscitation: A Randomized Simulation Study

Circulation ◽  
2020 ◽  
Vol 142 (Suppl_4) ◽  
Author(s):  
Hidetada Fukushima ◽  
Keisuke Takano ◽  
Hideki Asai
Keyword(s):  
Cardiopulmonary Resuscitation ◽  
Simulation Study ◽  
Average Rate ◽  
Sudden Cardiac Arrest ◽  
Video Camera ◽  
Guideline Recommendation ◽  
Compression Depth ◽  
Bystander Cardiopulmonary Resuscitation ◽  
Cpr Training ◽  
Study Participants

Introduction: Immediate bystander cardiopulmonary resuscitation (CPR) is essential for the good outcome of sudden cardiac arrest victims. Current guidelines recommend dispatch-assisted CPR (DACPR). Its quality, however, varies from case to case. The aim of this study was todetermine the effectiveness of dispatch coaching on the quality of CPR by lay rescuers. Methods: We conducted a DACPR simulation study. Participants with no prior CPR training within 1 year were assigned randomly to one of two DACPR simulations (No Coaching Group: callers were told to perform CPR and the dispatcher sometimes confirmed if the caller was performing CPR or Coaching Group: the dispatcher coached, encouraged, and counted out loud with a metronome). The study participants performed CPR for 2 minutes under the study dispatcher. All performances were recorded by video camera and Resusci Anne® QCPR (Laerdal, Norway). Results: Forty-nine participants aged 20s to 50s were recruited, and 48 completed the simulation (Coaching Group, 27, 9 males and No Coaching Group, 21, 16 males). The average rate of chest compressions was 102.5/min in Coaching Group and 109.3/min in No Coaching group (p=0.270). The average compression depth was slightly deeper in Coaching group (43.0mm vs 41.5mm, p=0.695). When compared the average depth of the first 10 compressions to the total average in each group, the depth significantly improved in Coaching group while that decreased in No Coaching Groups (38.4mm to 43.0mm; p=0.020, 42.3mm to 41.5mm; p=0.431, respectively). The chest compression fraction was also high in Coaching Group (99.4% vs 93.0%, p=0.005). Conclusions: Participants in Coaching Group performed better CPR compared to No Coaching Group in terms of high flow fraction. Although the average compression depth was below the guideline recommendation in both groups, it significantly improved in Coaching group. This study indicates that dispatch coaching can optimize the performance of bystander CPR.

Stock market predictability

2014 ◽  
Vol 31 (4) ◽  
pp. 354-370 ◽  
Author(s):  
Silvio John Camilleri ◽  
Christopher J. Green
Keyword(s):  
Stock Market ◽  
High Frequency ◽  
Serial Correlation ◽  
Design Methodology ◽  
High Frequency Data ◽  
Frequency Data ◽  
Content Type ◽  
Lag Effects ◽  
Daily Data ◽  
Indian Stock Market

Purpose – The main objective of this study is to obtain new empirical evidence on non-synchronous trading effects through modelling the predictability of market indices. Design/methodology/approach – The authors test for lead-lag effects between the Indian Nifty and Nifty Junior indices using Pesaran–Timmermann tests and Granger-Causality. Then, a simple test on overnight returns is proposed to infer whether the observed predictability is mainly attributable to non-synchronous trading or some form of inefficiency. Findings – The evidence suggests that non-synchronous trading is a better explanation for the observed predictability in the Indian Stock Market. Research limitations/implications – The indication that non-synchronous trading effects become more pronounced in high-frequency data suggests that prior studies using daily data may underestimate the impacts of non-synchronicity. Originality/value – The originality of the paper rests on various important contributions: overnight returns is looked at to infer whether predictability is more attributable to non-synchronous trading or to some form of inefficiency; the impacts of non-synchronicity are investigated in terms of lead-lag effects rather than serial correlation; and high-frequency data is used which gauges the impacts of non-synchronicity during less active parts of the trading day.

High-frequency displacement current transformer with just one winding

2019 ◽  
Vol 38 (4) ◽  
pp. 1141-1153 ◽  
Author(s):  
Yahia Achour ◽  
Jacek Starzyński
Keyword(s):  
High Frequency ◽  
Design Methodology ◽  
Current Transformer ◽  
Magnetic Core ◽  
Displacement Current ◽  
Frequency Range ◽  
Content Type ◽  
The Core ◽  
Difference Time ◽  
Secondary Winding

Purpose This paper aims to describe a new concept of transformer based on the displacement current. The paper shows how this idea can be translated into reality and presents an example of a working design. Design/methodology/approach The authors replace the primary winding of the transformer with a capacitor. The displacement current between the capacitor plates induces a magnetic flux in the core. This flux in turn induces electromotive force in the classical secondary winding. Findings The basic mathematical aspects illustrated by results obtained from a simulation developed using a commercial software ANSYS-HFSS are given. The saturation of the magnetic core due to the applied high-frequency range is investigated and simulated using a finite difference time domain code implemented in MATLAB. A prototype transformer was built and tested; the obtained results confirm the previous ones from simulations. Originality/value A new concept of the single winding transformer was used as a pulse forming circuit.

High frequency of HBV in HIV-infected prisoners in Mozambique

2019 ◽  
Vol 15 (1) ◽  
pp. 58-65
Author(s):  
Angelo Augusto ◽  
Orvalho Augusto ◽  
Atija Taquibo ◽  
Carina Nhachigule ◽  
Narcisa Siyawadya ◽  
...  
Keyword(s):  
Hepatitis B Virus ◽  
Hepatitis B ◽  
High Frequency ◽  
Design Methodology ◽  
Content Type ◽  
B Virus ◽  
First Time ◽  
Hiv Seropositive

Purpose The purpose of this paper is to determine the prevalence of hepatitis B virus (HBV) among 448 HIV-infected prisoners from 32 prisons in Mozambique. Design/methodology/approach All HIV seropositive prisoners were screened for HBV. Findings Of the 448 HIV seropositive prisoners, 51 (11.4 percent, 95%CI: 9.3–13.9 percent) were HBsAg-positive and was significantly higher in prisoners aged<25 years. Originality/value Data from this study show for the first time that the frequency of HBV among HIV-infected prisoners is high, suggesting that immediate interventions are needed during incarceration.

High-frequency traders: a review of the challenges in registering them as dealers

2014 ◽  
Vol 15 (3) ◽  
pp. 3-9
Author(s):  
Mark Fitterman ◽  
Ignacio Sandoval
Keyword(s):  
High Frequency ◽  
Design Methodology ◽  
Analytical Framework ◽  
Securities And Exchange Commission ◽  
Content Type ◽  
Market Participants ◽  
Concise Overview

Purpose – To describe some of the challenges that the Securities and Exchange Commission (SEC) will face in requiring that high-frequency traders register as dealers. Design/methodology/approach – This paper provides a brief overview of the dealer-trader distinction, an analytical framework under which some high-frequency traders have avoided registration with the SEC as dealers. It then explains the difficulties the SEC will encounter in bringing high-frequency traders within its regulatory umbrella as dealers. In particular, the paper outlines some of the interpretive challenges the SEC encounter as well as challenges to justifying the economics of any proposal. Findings – While the SEC has yet to formally propose rules in this area, the interpretive vehicle it uses could have repercussions for other market participants that rely on the dealer-trader distinction to avoid having to register as dealers with the SEC. Originality/value – The paper provides practical insights into the issues the SEC will have to address if it proposes to bring high-frequency traders within its regulatory umbrella as dealers. In addition, it provides a concise overview of the dealer-trader distinction based on statements by the SEC and its staff.

scholarly journals The effect of step stool use and provider height on CPR quality during pediatric cardiac arrest: A simulation-based multicentre study

CJEM ◽  
2017 ◽  
Vol 20 (1) ◽  
pp. 80-88 ◽  
Author(s):  
Adam Cheng ◽  
Yiqun Lin ◽  
Vinay Nadkarni ◽  
Brandi Wan ◽  
Jonathan Duff ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Cardiopulmonary Resuscitation ◽  
Visual Feedback ◽  
Just In Time ◽  
Average Height ◽  
Compression Depth ◽  
Simulation Based ◽  
Cpr Quality ◽  
Cpr Training ◽  
Gender Specific

AbstractObjectivesWe aimed to explore whether a) step stool use is associated with improved cardiopulmonary resuscitation (CPR) quality; b) provider adjusted height is associated with improved CPR quality; and if associations exist, c) determine whether just-in-time (JIT) CPR training and/or CPR visual feedback attenuates the effect of height and/or step stool use on CPR quality.MethodsWe analysed data from a trial of simulated cardiac arrests with three study arms: No intervention; CPR visual feedback; and JIT CPR training. Step stool use was voluntary. We explored the association between 1) step stool use and CPR quality, and 2) provider adjusted height and CPR quality. Adjusted height was defined as provider height + 23 cm (if step stool was used). Below-average height participants were ≤ gender-specific average height; the remainder were above average height. We assessed for interaction between study arm and both adjusted height and step stool use.ResultsOne hundred twenty-four subjects participated; 1,230 30-second epochs of CPR were analysed. Step stool use was associated with improved compression depth in below-average (female, p=0.007; male, p<0.001) and above-average (female, p=0.001; male, p<0.001) height providers. There is an association between adjusted height and compression depth (p<0.001). Visual feedback attenuated the effect of height (p=0.025) on compression depth; JIT training did not (p=0.918). Visual feedback and JIT training attenuated the effect of step stool use (p<0.001) on compression depth.ConclusionsStep stool use is associated with improved compression depth regardless of height. Increased provider height is associated with improved compression depth, with visual feedback attenuating the effects of height and step stool use.

scholarly journals Effect of real-time visual feedback device ‘Quality Cardiopulmonary Resuscitation (QCPR) Classroom’ with a metronome sound on layperson CPR training in Japan: a cluster randomized control trial

BMJ Open ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. e026140 ◽  
Author(s):  
Shota Tanaka ◽  
Kyoko Tsukigase ◽  
Takahiro Hara ◽  
Ryo Sagisaka ◽  
Helge Myklebust ◽  
...  
Keyword(s):  
Cardiopulmonary Resuscitation ◽  
Educational Achievement ◽  
Controlled Trial ◽  
Cluster Randomised Controlled Trial ◽  
Secondary Outcome ◽  
Control Group ◽  
Compression Depth ◽  
The Difference ◽  
Randomised Controlled ◽  
Cpr Training

Objectives‘Quality Cardiopulmonary Resuscitation (QCPR) Classroom’ was recently introduced to provide higher-quality Cardiopulmonary Resuscitation (CPR) training. This study aimed to examine whether novel QCPR Classroom training can lead to higher chest-compression quality than standard CPR training.DesignA cluster randomised controlled trial was conducted to compare standard CPR training (control) and QCPR Classroom (intervention).SettingLayperson CPR training in Japan.ParticipantsSix hundred forty-two people aged over 15 years were recruited from among CPR trainees.InterventionsCPR performance data were registered without feedback on instrumented Little Anne prototypes for 1 min pretraining and post-training. A large classroom was used in which QCPR Classroom participants could see their CPR performance on a big screen at the front; the control group only received instructor’s subjective feedback.Primary and secondary outcome measuresThe primary outcomes were compression depth (mm), rate (compressions per minute (cpm)), percentage of adequate depth (%) and recoil (%). Survey scores were a secondary outcome. The survey included participants’ confidence regarding CPR parameters and ease of understanding instructor feedback.ResultsIn total, 259 and 238 people in the control and QCPR Classroom groups, respectively, were eligible for analysis. After training, the mean compression depth and rate were 56.1±9.8 mm and 119.2±7.3 cpm in the control group and 59.5±7.9 mm and 116.8±5.5 cpm in the QCPR Classroom group. The QCPR Classroom group showed significantly more adequate depth than the control group (p=0.001). There were 39.0% (95% CI 33.8 to 44.2; p<0.0001) and 20.0% improvements (95% CI 15.4 to 24.7; P<0.0001) in the QCPR Classroom and control groups, respectively. The difference in adequate recoil between pretraining and post-training was 2.7% (95% CI −1.7 to 7.1; pre 64.2±36.5% vs post 66.9%±34.6%; p=0.23) and 22.6% in the control and QCPR Classroom groups (95% CI 17.8 to 27.3; pre 64.8±37.5% vs post 87.4%±22.9%; p<0.0001), respectively.ConclusionsQCPR Classroom helped students achieve high-quality CPR training, especially for proper compression depth and full recoil. For good educational achievement, a novel QCPR Classroom with a metronome sound is recommended.

Performance simulation and testing of capacitive micro-machined ultrasonic transducer

Sensor Review ◽  
2019 ◽  
Vol 39 (4) ◽  
pp. 554-566
Author(s):  
Rui Zhang ◽  
Lei Zhao ◽  
Dan Xie ◽  
Jinlong Song ◽  
Wendong Zhang ◽  
...  
Keyword(s):  
High Frequency ◽  
Design Methodology ◽  
Ultrasonic Transducer ◽  
Dynamic Performance ◽  
Transimpedance Amplifier ◽  
Echo Signal ◽  
Performance Simulation ◽  
Content Type ◽  
Detection Circuit ◽  
Dynamic Performance Analysis

Purpose This study aims to simulate and test the performance of a transmitting and receiving capacitive micro-machined ultrasonic transducer (CMUT). Aimed at detecting demand of the CMUT, a matched integrated adjustment circuit was designed through analyzing processing methods of transducer’s weak echo signal. Design/methodology/approach Based on the analysis of CMUT array structure and work principle, the CMUT units are designed and the dynamic performance analysis of SIMULINK is given according to the demand of underwater detecting. A transceiver isolation circuit is used to make transmission mode and receiving mode separate. A detection circuit is designed based on the transimpedance amplifier to achieve extraction of high-frequency and weak signal. Findings Through experimentation, the effectiveness of the CMUT performance simulation and the transceiver integrated adjustment circuit were verified. In addition, the test showed that CMUT with 400 kHz frequency has wider bandwidth and better dynamic characteristics than other similar transducers. Originality/value This paper provides a theoretical basis and design reference for the development and application of CMUT technology.

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