A b s t r a c tBackground: Drowning is a common issue at many pools and beaches, and in seas all over the world. Lifeguards often act as bystanders, and therefore adequate training in high-quality cardiopulmonary resuscitation (CPR) and use of adequate equipment by lifeguards is essential. Aim:The aim of this study was to evaluate the impact of the recently introduced CPRMeter (Laerdal, Stavanger, Norway) on quality of CPR, if used by moderately experienced CPR providers. In particular, we tested the hypothesis that using the CPRMeter improves quality of chest compression by lifeguards compared to standard non-feedback CPR. Methods:The study was designed as prospective, randomised, cross-over manikin trial. Fifty lifeguards of the Volunteer Water Rescue Service (WOPR), a Polish nationwide association specialised in water rescue, participated in this study. Participants were randomly assigned 1:1 to one of two groups: a feedback group and a non-feedback group. Participants swim a distance of 25 m in the pool, and then they were asked to haul a manikin for the second 25 m, simulating rescuing a drowning victim. Once participants finished the second 25-m distance, participants were asked to initiate 2-min basic life support according to the randomisation. Results:The median quality of CPR score for the 2-min CPR session without feedback was 69 (33-77) compared to 84 (55-93) in the feedback group (p < 0.001). Compression score, mean depth, rate of adequate chest compressions/min, and overall mean rate during the CPR session improved significantly in the feedback group, compared to the non-feedback group. Conclusions:Using the visual real-time feedback device significantly improved quality of CPR in our relatively unexperienced CPR providers. Better quality of bystander CPR is essential for clinical outcomes, and therefore feedback devices should be considered. Further clinical studies are needed to assess the effect of real-time visual devices, especially in bystander-CPR.

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Background: The ability to perform high-quality cardiopulmonary resuscitation is one of the basic skills for lifeguards. The aim of the study was to assess the influence of chest compression frequency on the quality of the parameters of chest compressions performed by lifeguards. Methods: This prospective observational, randomized, crossover simulation study was performed with 40 lifeguards working in Warsaw, Wroclaw, and Poznan, Poland. The subjects then participated in a target study, in which they were asked to perform 2-min cycles of metronome-guided chest compres

Background:The purpose herein, was to perform a systematic review of interventional outcome studies in patients with in-hospital cardiac arrest before and during the coronavirus disease 2019 (COVID-19) pandemic period.Methods: A meta-analysis was performed of publications meeting the following PICOS criteria: (1) participants, patients > 18 years of age with cardiac arrest due to any causes; (2) intervention, cardiac arrest in COVID-19 period; (3) comparison, cardiac arrest in pre-COVID-19 period; (4) outcomes, detailed information for survival; (5) study design, randomized controlled trials, quasi-randomized or observational studies comparing cardiac arrest in COVID-19 and pre-COVID-19 period for their effects in patients with cardiac arrest.Results: SHD for the pre-pandemic and pandemic period was reported in 3 studies (n =1432 patients) and was similar in the pre-pandemic vs. the pandemic period, 35.6% vs. 32.1%, respectively (odds ratio [OR] 1.72; 95% confidence interval [CI] 0.81-3.65; p = 0.16; I 2 = 72%). Return of spontaneous circulation was reported by all 4 studies and were also similar in the pre and during COVID-19 periods, 51.9% vs. 48.7% (OR 1.27; 95% CI 0.78-2.07; p = 0.33; I 2 = 71%), respectively. Pooled analysis of cardiac arrest recurrence was also similar, 24.9% and 17.9% (OR 1.60; 95% CI 0.99-2.57; p = 0.06; I 2 = 32%) in the pre and during COVID-19 cohorts. Survival with Cerebral Performance Category 1 or 2 was higher in pre vs. during pandemic groups (27.3 vs. 9.1%; OR 3.75;; p = 0.02). Finally, overall mortality was similar in the pre vs. pandemic groups, 65.9% and 67.2%, respectively (OR 0.67; 95% CI 0.33-1.34; p = 0.25; I 2 = 76%). Conclusions:Compared to the pre-pandemic period, in hospital cardiac arrest in COVID-19 patients was numerically higher but had statistically similar outcomes.