Average Compression Depth Research Articles

Pedagogical Implementation of Directive Feedback Manikins on Cardiopulmonary Resuscitation (CPR) Competencies: Expert Versus Peer Coaching.

Directive feedback manikins in resuscitation training evolved faster than the pedagogical evidence. Educators and learning systems must seek clarification on the efficacy of this technology to have evidence-based practices. This project explores directive feedback device use in cardiopulmonary resuscitation (CPR) education for laypersons. A prospective nonrandomized-controlled design assessed two pedagogical approaches of directive feedback manikins in adult CPR lessons.The 230 participants were distributed between three groups: a control group without directive feedback manikins (no lights, NL), an expert coaching (EC) group with directive feedback and educator interpretation, and a peer coaching (PC) group with directive feedback, peer interpretation, and expert quality assurance. From the 25 courses observed, average compression depth (mm) did not differ between groups (p = .498),average compression rate (compressions: minute) significantly differed between groups (p = .004), and correct hand placement did not differ between groups (p = .249). A chi-square test showed no significant association between groups and CPR skill feedback, or between groups and "recommending the course to a friend or family member." The PC group was more likely to agree that they could "coach someone to do CPR skills" than the NL or EC. This study expands the knowledge base of directive feedback manikins in a pedagogical setting to improve CPR competencies. Training organizations may consider any of these practices effective,choosing those that align with desired outcomes. CPR educators need orientation to feedback devices as well as professional development on educational options for their use. Considerations for further research include technology costs, access, and cultural aspects of implementing these tools.

Drone-Facilitated Real-Time Video-Guided Feedback Helps to Improve the Quality of Lay Bystander Basic Life Support. A Randomized Controlled Simulation Trial

Objectives Telephone instructions are commonly used to improve cardiopulmonary resuscitation (CPR) by lay bystanders. This usually implies an audio but no visual connection between the provider and the emergency medical telecommunicator. We aimed to investigate whether video-guided feedback via a camera drone enhances the quality of CPR. Methods We conducted a randomized controlled simulation trial. Lay rescuers performed 8 min of CPR on an objective feedback manikin. Participants were randomized to receive telephone instructions with (intervention group) or without (control group) a drone providing a visual connection with the telecommunicator after a 2-min run-in phase. Performed work (total compression depth minus total lean depth) was the primary outcome. Secondary outcomes were the proportion of effective chest compressions, average compression depth, subjective physical strain measured every 2 min, and dexterity in the nine-hole peg test after the scenario. Outcomes were compared using the t- and Mann Whitney-U tests. A two-sided p-value of <0.05 was considered significant. Results We included 27 individuals (14 (52%) female, mean age 41 ± 14 years). Performed work was greater in the intervention than in the control group (41.3 ± 7.0 vs. 33.9 ± 10.9 m; absolute difference 7.5, 95% CI 1.4 to 14.8; p = 0.046), with higher average compression depth (49 ± 7 vs. 40 ± 13 mm; p = 0.041), and higher proportions of adequate chest compressions (43 (IQR 14–60) vs. 3 (0–29) %; p = 0.041). We did not find any significant differences regarding the remaining secondary outcomes. Conclusion Video-guided feedback via drones might be a helpful tool to enhance the quality of telephone-assisted CPR in lay bystanders.

Comparison of the effects of using feedback devices for training or simulated cardiopulmonary arrest

BackgroundHigh-quality chest compression is essential for successful cardiac arrest resuscitation. High-quality cardiopulmonary resuscitation (CPR) can effectively improve the survival rate of patients with cardiopulmonary arrest. However, bystanders untrained in cardiopulmonary resuscitation may provide inadequate chest compressions. Previous studies have shown that the use of feedback devices in training alone or in simulated cardiopulmonary arrest alone can improve cardiopulmonary resuscitation. This study aims to determine whether using an audiovisual feedback (AVF) device during CPR training or a simulated cardiopulmonary arrest (CA) scenario would be more effective in improving the quality of chest compressions (CC).MethodsWe use a prospective, randomized, 2 × 2 factorial design trial. A total of 160 participants from Wuhan University and senior clinical medicine undergraduates who had not participated in any CPR training before and had no actual CPR experience are recruited. Each participant is randomized to 1 of 4 permutations, including AVF device vs. no AVF device during CPR training and AVF device vs. no AVF device during simulated CA. Main outcomes and measures are the depth, the percentage of CCs with correct depth (5–6 cm), the rate of CCs, and the percentage of CCs with the correct rate (100–120 cpm).ResultsThe use of the AVF device during simulated CA resulted in improved CC quality. In CA without AVF device, the average compression depth and the percentage of adequate depth with AVF device are 5.1 cm, 5.0 cm and 55.5%, 56.3%, respectively, which are higher than those without AVF device (4.5 cm, 4.7 cm and 32.8%, 33.6%). (p = 0.011, p = 0.000, both < 0.05).Compared with CA without AVF device, the average compression rate and the percentage of adequate rate with AVF device are 112.3 cpm, 111.2 cpm and 79.4%, 83.1%, respectively. The average compression rate and the percentage of adequate rate without using the AVF device are 112.4 cpm, 110.3 cpm and 71.5%, 68.5%, respectively. (p = 0.567 > 0.05, p = 0.017 < 0.05)Although the average compression rate in group D is slightly lower than that in group C, the percentage of suitable frequency with the feedback device is still higher than that without AVF device.ConclusionUsing a feedback device during simulated cardiopulmonary arrest is more effective in improving cardiopulmonary resuscitation than during training.

Effectiveness of Blended Versus Traditional Refresher Training for Cardiopulmonary Resuscitation: Prospective Observational Study.

Generally, cardiopulmonary resuscitation (CPR) skills decline substantially over time. By combining web-based self-regulated learning with hands-on practice, blended training can be a time- and resource-efficient approach enabling individuals to acquire or refresh CPR skills at their convenience. However, few studies have evaluated the effectiveness of blended CPR refresher training compared with that of the traditional method. This study investigated and compared the effectiveness of traditional and blended CPR training through 6-month and 12-month refresher sessions with CPR ability indicators. This study recruited participants aged ≥18 years from the Automated External Defibrillator Donation Project. The participants were divided into 4 groups based on the format of the CPR training and refresher training received: (1) initial traditional training (a 30-minute instructor-led, hands-on session) and 6-month traditional refresher training (Traditional6 group), (2) initial traditional training and 6-month blended refresher training (an 18-minute e-learning module; Mixed6 group), (3) initial traditional training and 12-month blended refresher training (Mixed12 group), and (4) initial blended training and 6-month blended refresher training (Blended6 group). CPR knowledge and performance were evaluated immediately after initial training. For each group, following initial training but before refresher training, a learning effectiveness assessment was conducted at 12 and 24 months. CPR knowledge was assessed using a written test with 15 multiple-choice questions, and CPR performance was assessed through an examiner-rated skill test and objectively through manikin feedback. A generalized estimating equation model was used to analyze changes in CPR ability indicators. This study recruited 1163 participants (mean age 41.82, SD 11.6 years; n=725, 62.3% female), with 332 (28.5%), 270 (23.2%), 258 (22.2%), and 303 (26.1%) participants in the Mixed6, Traditional6, Mixed12, and Blended6 groups, respectively. No significant between-group difference was observed in knowledge acquisition after initial training (P=.23). All groups met the criteria for high-quality CPR skills (ie, average compression depth: 5-6 cm; average compression rate: 100-120 beats/min; chest recoil rate: >80%); however, a higher proportion (98/303, 32.3%) of participants receiving blended training initially demonstrated high-quality CPR skills. At 12 and 24 months, CPR skills had declined in all the groups, but the decline was significantly higher in the Mixed12 group, whereas the differences were not significant between the other groups. This finding indicates that frequent retraining can maintain high-quality CPR skills and that blended refresher training is as effective as traditional refresher training. Our findings indicate that 6-month refresher training sessions for CPR are more effective for maintaining high-quality CPR skills, and that as refreshers, self-learning e-modules are as effective as instructor-led sessions. Although the blended learning approach is cost and resource effective, factors such as participant demographics, training environment, and level of engagement must be considered to maximize the potential of this approach. IGOGO NCT05659108; https://www.cgmh-igogo.tw.

Resuscitation Quality Improvement® (RQI®) HeartCode Complete® program improves chest compression rate in real world out-of hospital cardiac arrest patients

BackgroundThe Resuscitation Quality Improvement® (RQI®) HeartCode Complete® program is designed to enhance cardiopulmonary resuscitation (CPR) training by using real-time feedback manikins. Our objective was to assess the quality of CPR, such as chest compression rate, depth, and fraction, performed on out-of-hospital cardiac arrest (OHCA) patients among paramedics trained with the RQI® program vs. paramedics who were not. Methods and ResultsAdult OHCA cases from 2021 were analyzed; 353 OHCA cases were classified into one of three groups: 1) 0 RQI®-trained paramedics, 2) 1 RQI®-trained paramedic, and 3) 2–3 RQI®-trained paramedics. We reported the median of the average compression rate, depth, and fraction, as well as percent of compressions that were between 100 to 120/minute and percent of compressions that were 2.0 to 2.4 inches deep. Kruskal-Wallis Tests were used to assess differences in these metrics across the three groups of paramedics. Of 353 cases, the median of the average compression rate/minute among crews with 0, 1, and 2–3 RQI®-trained paramedics was 130, 125, and 125, respectively (p = 0.0032). Median percent of compressions between 100 to 120 compressions/minute was 10.3%, 19.7%, and 20.1% among crews with 0, 1, and 2–3 RQI®-trained paramedics, respectively (p = 0.0010). Median of the average compression depth was 1.7 inches across all three groups (p = 0.4881). Median compression fraction was 86.4%, 84.6%, and 85.5% among crews with 0, 1, and 2–3 RQI®-trained paramedics, respectively (p = 0.6371). ConclusionsRQI® training was associated with statistically significant improvement in chest compression rate, but not improved chest compression depth or fraction in OHCA.

The Impact of Compression Rates on the Quality of Cardiopulmonary Resuscitation: A Cross Over Randomized Control Study in Manikin.

High-quality cardiopulmonary resuscitation (HQ-CPR) focuses on improving heart and brain blood perfusion. The evaluation of HQ-CPR included depth, frequency, rate of chest compressions, and the occurrence of chest recoil between two chest compressions. Staff performing CPR may not be performing HQ-CPR since it is influenced by individual stamina, physical strength, and lack of target marker. We aimed to study the impact of 100 times per minute rate vs. 120 times per minute CPR rate on the depth and percentage of depth-on-target done by trained staff on a manikin. This was a cross-over randomized control study. The subjects were anesthesiology and intensive care residents in a tertiary teaching hospital in Indonesia, all certified to perform advanced life support. The subject was asked to perform both CPR of 100 and 120 times per minute after a period of one-day rest. The standardized adult manikin was used, and the depth of CPR was measured using a pad-sensor attached to the manikin, and the results were transferred to recording software. Analysis was done using the chi-square analysis, and p < 0.05 was considered statistically significant. A total of 35 subjects were included. The results showed that the average compression depth at 100 times/minute was more statistically superficial than the 120 times/minute treatment (5.210 ± 0.319 vs. 5.430 ± 0.283, p = 0.007). In contrast, the compression depth-on-target percentage was significantly higher at a speed of 100 times per minute (37.130 ± 10.233 vs. 18.730 ± 7.224, p = 0.0001). One hundred times per minute CPR resulted in a statistically significant lower compression depth, although not clinically significant, with a statistically significant higher percentage of compression depth-on-target than 120 times per minute CPR.

Improve Cardiac Emergency Preparedness by Building a Team-Based Cardiopulmonary Resuscitation Educational Plan.

ObjectiveTo design an innovative team-based cardiopulmonary resuscitation (CPR) educational plan for multiple bystanders and evaluate whether it was associated with better teamwork and higher quality of resuscitation.MethodsThe team-based CPR plan defined the process for a three-person team, emphasize task allocation, leadership, and closed-loop communication. Participants qualified for single-rescuer CPR skills were randomized into teams of 3. The teamwork performance and CPR operation skills were evaluated in one simulated cardiac arrest scenario before and after training on the team-based CPR plan. The primary outcomes were measured by the Team Emergency Assessment Measure (TEAM) scale and chest compression fraction (CCF).ResultsForty-three teams were included in the analysis. The team-based CPR plan significantly improved the team performance (global rating 6.7 ± 1.3 vs. 9.0 ± 0.7, corrected p < 0.001 after Bonferroni's correction). After implementing the team-based CPR plan, CCF increased [median 59 (IQR 48–69) vs. 64 (IQR 57–71%)%, corrected p = 0.002], while hands-off time decreased [median 233.2 (IQR 181.0–264.0) vs. 207 (IQR 174–222.9) s, corrected p = 0.02]. We found the average compression depth was significantly improved through the team-based CPR training [median 5.1 (IQR 4.7–5.6) vs. 5.3 (IQR 4.9–5.5) cm, p = 0.03] but no more significantly after applying the Bonferroni's correction (corrected p = 0.35). The compression depths were significantly improved by collaborating and exchanging the role of compression among the participants after the 6th min.ConclusionThe team-based CPR plan is feasible for improving bystanders teamwork performance and effective for improving resuscitation quality in prearrival care. We suggest a wide application of the team-based CPR plan in the educational program for better resuscitation performance in real rescue events.

Effects of vertical compression during pediatric cardiopulmonary resuscitation using the one-handed chest compression technique

ObjectiveThe posture of the rescuer while performing the one-handed chest compression (OHCC) has not yet been evaluated. This study aimed to investigate the effect of vertical compression during pediatric cardiopulmonary resuscitation (CPR) using the OHCC technique. MethodsThis was a prospective randomized crossover simulation trial. A total of 42 medical doctors conducted a 2-min single-rescuer CPR using the conventional OHCC (Test 1) or vertical OHCC (Test 2) technique on a pediatric manikin. The chest compression and ventilation parameters were measured in real time during the experiments using sensors embedded in the manikin. In addition, the compression force of each technique was measured using a force plate. ResultsThe average and adequate chest compression depth (CCD) were significantly higher in Test 2 than in Test 1 (average depth: 54.0 mm (interquartile range [IQR]: 48.5–56.0) in Test 2 vs. 49.0 mm (IQR: 40.0–54.0) in Test 1, P < 0.001; adequate depth: 99.0% (IQR: 36.3–100.0) in Test 2 vs. 52.0% (IQR: 0.0–98.0) in Test 1, P < 0.001). The average force of compression was also significantly higher in vertical OHCC than that in conventional OHCC (25.7 kg ± 4.4 in vertical OHCC vs. 24.5 kg ± 4.2 in conventional OHCC, P < 0.001). The ventilation parameters were not significantly different between Tests 1 and 2. ConclusionsThe vertical OHCC could provide a deeper and more adequate CCD compared with the conventional OHCC, and the advantages of the vertical OHCC originate from the superiority of the compression force.

Leg-heel chest compression as an alternative for medical professionals in times of COVID-19.

ObjectiveTo evaluate leg-heel chest compression without previous training as an alternative for medical professionals and its effects on distance to potential aerosol spread during chest compression.Methods20 medical professionals performed standard manual chest compression followed by leg-heel chest compression after a brief instruction on a manikin. We compared percentage of correct chest compression position, percentage of full chest recoil, percentage of correct compression depth, average compression depth, percentage of correct compression rate and average compression rate between both methods. In a second approach, potential aerosol spread during chest compression was visualized.ResultsOur data indicate no credible difference between manual and leg-heel compression. The distance to potential aerosol spread could have been increased by leg-heel method.ConclusionUnder special circumstances like COVID-19-pandemic, leg-heel chest compression may be an effective alternative without previous training compared to manual chest compression while markedly increasing the distance to the patient.

The Value of Songs for Teaching and Learning Cardiopulmonary Resuscitation (CPR) Competencies: A Systematic Review

We sought to summarize, in a systematic review, the effectiveness of songs to support learning, performance, and recall of quality characteristics of cardiopulmonary resuscitation (CPR) compression rate, and depth. We systematically reviewed the literature from eight academic indexes from the fields of medicine, nursing, allied health, and education, from 2014 to 2020 to identify studies that evaluated an intervention of song use during CPR training against control and reported outcomes of compression rate and depth.There were 185 studies initially identified for review, eight met criteria for inclusion and analysis. For the critical outcome of compression depth, a pooled song group (n=446) when compared to a non-song group (n=443) demonstrated higher odds of being in the recommended range (OR 3.47). All studies, however, performed an average compression depth shallower than recommended guidelines in each arm. The available literature, we found, utilized heterogenous methodology and was at high risk of bias. When pooled, there were trends towards improved CPR metric performance in groups who were exposed to songs during treatment, though this only reached significance when groups were tested at >30 days from initial exposure. Findings of lower compression rates in the song groups suggest that song selection should favor beats per minute closer to the midpoint of the 100-120 ideal range to allow for variation when used as mental metronomes.

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

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.

Long-term benefits of chest compression-only cardiopulmonary resuscitation training using real-time visual feedback manikins: a randomized simulation study.

ObjectiveCardiopulmonary resuscitation (CPR) education with a feedback device is known to result in better CPR skills compared to one without the feedback device. However, its long-term benefits have not been established. The purpose of this study was to evaluate the long-term CPR skill retention after training using real-time visual manikins in comparison to that of non-feedback manikins.MethodsWe recruited 120 general university students who were randomly divided into the real-time feedback group (RTFG) and the non-feedback group. Of them, 95 (RTFG, 48; non-feedback group, 47) attended basic life support and automated external defibrillation training for 1 hour. For comparison of retention of CPR skills, the two groups were evaluated based on 2-minute chest compression performed immediately after training and at 3, 6, and 9 months. The CPR parameters between the two groups were also compared using a generalized linear model.ResultsAt immediately after training, the performance of RTFG was better in terms of average chest compression depth (51.9±1.1 vs. 45.5±1.1, p<0.001) and a higher percentage of adequate chest compression depth (51.0±4.1 vs. 26.9±4.2, p<0.001). This significant difference was maintained until 6 months after training, but there was no difference at 9 months after training. However, there was no significant difference in the chest compression rate and the correct hand position at any time point.ConclusionCPR training with a real-time visual feedback manikin improved skill acquisition in chest compression depth, but only until 6 months after the training. It could be a more effective educational method for basic life support training in laypersons.

The Effectiveness of a New Dispatcher-Assisted Basic Life Support Training Program on Quality in Cardiopulmonary Resuscitation Performance During Training and Willingness to Perform Bystander Cardiopulmonary Resuscitation: A Cluster Randomized Controlled Study.

A new dispatcher-assisted basic life support training program, called "Home Education and Resuscitation Outcome Study (HEROS)" was developed with a goal to provide high-quality dispatcher-assisted cardiopulmonary resuscitation (CPR) training, with a focus on untrained home bystanders. This study aimed to determine whether the HEROS program is associated with improved quality in CPR performance during training and willingness to provide bystander CPR compared with other basic life support programs without dispatcher-assisted CPR (non-HEROS). This clustered randomized trial was conducted in 3 district health centers in Seoul. Intervention group was trained with the HEROS program and control group was trained with non-HEROS program. The primary outcome was overall CPR quality, measured as total CPR score. Secondary outcomes were other CPR quality parameters including average compression depth and rate, percentages of adequate depth, and acceptable release. Tertiary outcomes were posttraining survey results. Difference in difference analysis was performed to analyze the outcomes. Among total 1929 trainees, 907 (47.0%) were trained with HEROS program. Compared with the non-HEROS group, the HEROS group showed higher-quality CPR performances and better maintenance of their CPR quality throughout the course (total scores of 84% vs. 80% for first session and 72% vs. 67% for last session; difference in difference of 12.2 vs. 13.2). Other individual CPR parameters also showed significantly higher quality in the HEROS group. The posttraining survey showed that both groups were highly willing to perform bystander CPR (91.4% in the HEROS vs. 92.3% in the non-HEROS) with only 3.4% of respondents in the HEROS group were not willing to volunteer compared with 6.2% in the non-HEROS group (P < 0.01). The HEROS training program helped trainees perform high-quality CPR throughout the course and enhanced their willingness to provide bystander CPR.

ACTIVIDADES DEPORTIVAS CON SOPORTE MUSICAL: ¿UNA NUEVA FORMA DE APRENDER REANIMACIÓN CARDIOPULMONAR?

El objetivo del estudio fue analizar la viabilidad de enseñar RCP en actividades deportivas con apoyo musical y evaluar si este nuevo enfoque iguala los resultados de un curso tradicional de reanimación cardiopulmonar (RCP). Participaron 84 estudiantes universitarias sin conocimientos de RCP distribuidas en dos grupos de forma aleatoria. El primero recibió formación de RCP sólo manos integradas en una clase de aeróbic y el otro recibió un curso de RCP de manera convencional. Los resultados en la clase coreografiada comparados con el curso tradicional fueron: Profundidad media de compresiones (41,64 vs 42,92; p= 0,446), re-expansión correcta (65,47% vs 72,47%; p=0,423), frecuencia de compresiones en un minuto (102,50 vs 138,53; p&lt;0,001), compresiones totales (202,50 vs 277,95; p&lt; 0,001). Los dos métodos formativos alcanzaron resultados similares por lo que la introducción de la enseñanza de RCP en actividades deportivas puede ser un nuevo método formativo.

Comparison of Chest Compression Quality Using Wing Boards versus Walking Next to a Moving Stretcher: A Randomized Crossover Simulation Study.

Background: When a rescuer walks alongside a stretcher and compresses the patient’s chest, the rescuer produces low-quality chest compressions. We hypothesized that a stretcher equipped with wing boards allows for better chest compressions than the conventional method. Methods: In this prospective, randomized, crossover study, we enrolled 45 medical workers and students. They performed hands-on chest compressions to a mannequin on a moving stretcher, while either walking (the walk method) or riding on wings attached to the stretcher (the wing method). The depths of the chest compressions were recorded. The participants’ vital signs were measured before and after the trials. Results: The average compression depth during the wing method (5.40 ± 0.50 cm) was greater than during the walk method (4.85 ± 0.80 cm; p < 0.01). The average compression rates during the two minutes were 215 ± 8 and 217 ± 5 compressions in the walk and wing methods, respectively (p = ns). Changes in blood pressure (14 ± 11 vs. 22 ± 14 mmHg), heart rate (32 ± 13 vs. 58 ± 20 bpm), and modified Borg scale (4 (interquartile range: 2–4) vs. 6 (5–7)) were significantly lower in the wing method cohort compared to the walking cohort (p < 0.01). The rescuer’s size and physique were positively correlated with the chest compression depth during the walk method; however, we found no significant correlation in the wing method. Conclusions: Chest compressions performed on the stretcher while moving using the wing method can produce high-quality chest compressions, especially for rescuers with a smaller size and physique.

Evaluation of Chest Compression Quality and Appropriateness in the Pediatric Cardiopulmonary Resuscitation

Background/Objective: This study aimed to verify the quality and the appropriateness of pediatric CPR chest compressions according to 2015 Korean Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care.Method/Statistical Analysis: The participants of this study were 64 EMT and nursing students who were quailified as BLS providers. Four sets of 5 CPR cycles were performed with one hand and two hands at the ratio of chest compression (30 times) to respiration (2 times), and fatigue was confirmed by NRS(numeral rating scale). Collected data were analyzed using frequency, descriptive statistics, paired t-test, and repeated measure ANOVA by SPSS 22.0.Findings: While the total number of chest compressions (629.6 times vs. 618.3 times, p=.016) and hands-off time (6.6 sec vs. 6.9 sec, p=.006) were effective for one-handed chest compression, average pressure depth (42.2mm vs. 43.8mm, p<.001), sufficient chest compression depth rate (83.0% vs. 89.1%, p=.038) and fatigue (7.0 points vs. 6.2 points, p=.040) were more effective in two-handed chest compressions. In addition, there were significant differences in the average chest compression depth over time(p=.003) and the total elapsed time (p=.332), but no significant difference in inappropriate chest compression.Improvements/Applications: Performing pediatric CPR according to the 2015 Guidelines for Pediatric Cardiopulmonary resuscitation is acceptable, but it is necessary to consider two-hand chest compression more than one hand compression.

Variations in chest compression time, ventilation time and rescuers' heart rate during conventional cardiopulmonary resuscitation in trained male rescuers.

ObjectiveThis study was conducted to determine why rescuers could maintain adequate chest compression depth for longer periods during conventional cardiopulmonary resuscitation (CPR).MethodsVarious CPR parameters, including average compression depth (ACD), average compression rate, average ventilation time (AVT), and rescuers’ heart rates were recorded in real-time when 20 health care providers performed 10 minutes of conventional CPR during a simulation experiment.ResultsThe ACD was maintained above 50 mm and was not significantly different during 19 consecutive CPR cycles. The average compression rate increased from 114.9±10.0/min (2nd cycle) to 120.1±13.8/min (18th cycle) (P=0.007), and the AVT increased from 8.7±1.5 seconds (3rd cycle) to 10.1±2.6 seconds (18th cycle) (P=0.002). The rescuers’ heart rates also increased gradually for 10 min; however, they increased rapidly and were highest during the ventilation phase. Their heart rates then decreased and were lowest during the early chest compression phases of each CPR cycle. Decreases in heart rates were significant in all CPR cycles (average decrease: 14.5±4.5 beats/min, P<0.001).ConclusionThe ACD was maintained adequately during 10 minutes of conventional CPR. However, the AVT increased significantly during the 10-minute period. The rescuers’ heart rates increased and decreased throughout all CPR cycles. These results showed that the ventilation phase might play a role as a resting period and be a reason for the maintenance of adequate chest compression depth for prolonged periods during conventional CPR.

Impact of cardiopulmonary resuscitation (CPR) on the survival of patients with cancer: DNR before or after cardiac arrest?

71 Background: Cardiopulmonary resuscitation (CPR) after cardiac arrest in cancer patients is associated with lower survival rates when compared to non-cancer patients. The quality of life of those who survive after CPR to be discharged is often diminished. Among these patients there is a high likelihood of changing their code status to DNR. Methods: Our study determines the overall survival rate, the survival to discharge rate, and the DNR change rate postcode among cancer patients who underwent CPR in our cancer center. Data was analyzed retrospectively from electronic records of cancer patients who had cardiac arrest and underwent CPR between April 2017 and March 2018 at a tertiary cancer center. The end points included the overall survival immediately after CPR, the survival rate at 24h, the survival to discharge rate, and the DNR change rate postcode. Results: Between 2017 and 2018, a total of 396 codes were registered in cancer patients in our center, out of which 53% had cardiopulmonary arrest as trigger event. In more than 90% of the patients, average chest compression rate, average compression rate, average compression depth, and overall compression in the targeted zone were obtained, meeting all the required criteria to deliver high-quality CPR. Overall survival rate in cancer patients was 79% after CPR efforts. The survival rate at 24h was 48%, while the rate of survival to discharge was 17%. 64% of the patients changed their code status to DNR in critical care settings. Conclusions: The prognosis remains poor for cancer patients undergoing CPR. A significant proportion of patients who survive CPR will become DNR postcode. Physicians should effectively and honestly engage in discussing end of life matters with their cancer patients.

Abstract 226: Comparison of a Low and High Resource Model to Effectively Train College Students in Compression Only Cardiopulmonary Resuscitation

Introduction: High quality chest compressions, as measured by depth and rate per minute, are an integral component of cardiopulmonary resuscitation (CPR). CPR compression skills are often taught on a high resource training device such as manikin torso. Use of these manikin torso devices may be limited by availability and cost, reducing the number of individuals trained in CPR. We hypothesize that a bed pillow, a low resource device, is as effective as a manikin torso, a high resource device, in training college students to perform compression only CPR. Methods: College students with no prior CPR training were randomized to one of two training rooms, one with a bed pillow (n=119) and one with a manikin torso (n=123). Each participant watched a two- minute training video, which included a demonstration using the respective device and a practice-while-watching technique chest compression skills practice. Each room had a certified CPR instructor to assist and answer any technical questions. Another CPR instructor, blinded to the training randomizations, observed each participant for one minute on a recording manikin that evaluated the depth and rate of compressions. Results: Manikin-trained students had a significantly higher mean rate of compressions per minute compared to the pillow-trained students (122.9 vs. 118.0; p= 0.028). The manikin group exceeded the recommended rate range (100-120 compressions per minute). There was no significant difference between compression depth in the two groups; manikin-trained students had an average compression depth of 38.27 mm while pillow-trained students had an average compression depth of 38.50 mm (p=0.89). Mean compression depth for both groups were below the guidelines (50-61 mm).There was no significant difference (p=0.81) between the overall CPR competency of the pillow-trained compared to the manikin-trained students as measured by rate and depth of compressions. Conclusions: These findings demonstrate that a low resource pillow is comparable to a high resource manikin as a CPR training device. The use of a low resource training device can remove the barriers of cost and availability in training college students in CPR. This training method will allow for an increase in the number of people trained to save lives.

Effect of 3 basic life support training programs in future primary school teachers. A quasi-experimental design

AimTo evaluate the learning of basic life support (BLS) measures on the part of laypersons after 3 different teaching programs. DesignA quasi-experimental before–after study involving a non-probabilistic sample without a control group was carried out. ScopePrimary school teacher students from the University of Santiago (Spain). ParticipantsA total of 124 students (68.8% women and 31.2% men) aged 20–39 years (M=22.23; SD=3.79), with no previous knowledge of BLS, were studied. InterventionsThree teaching programs were used: a traditional course, an audio-visual approach and feedback devices. Main variables of interestChest compressions as sole cardiopulmonary resuscitation skill evaluation: average compression depth, compression rate, chest recoil percentage and percentage of correct compressions. Automated external defibrillator: time needed to apply a shock before and after the course. ResultsThere were significant differences in the results obtained after 2min of chest compressions, depending on the training program received, with feedback devices having a clear advantage referred to average compression depth (p<0.001), compression rate (p<0.001), chest recoil percentage (p<0.001) and percentage of correct compressions (p<0.001). Regarding automated external defibrillator, statistically significant differences were found in Tafter (p=0.025). ConclusionsThe teaching course using feedback devices obtained the best results in terms of the quality of chest compressions, followed by the traditional course and audio-visual approach. These favorable results were present in both men and women. All 3 teaching methods reached the goal of reducing defibrillation time.