Abdominal compressions during cardiopulmonary resuscitation: a scoping review / Compresiones abdominales durante la reanimación cardiopulmonar: una revisión de alcance / Compressões abdominais durante a reanimação cardiopulmonar: revisão de escopo

ABSTRACT Objectives: to map the scientific evidence on the use of abdominal compressions during cardiopulmonary resuscitation in patients with cardiac arrest. Methods: this is a scoping review based on the question: "What is the evidence regarding the use of abdominal compressions during cardiopulmonary resuscitation in patients with cardiac arrest?". Publications up to August 2022 were collected from eight databases. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews was used. Results: seventeen publications were included. The identified general population consisted of adults and elderly individuals. The primary outcome revealed significant rates of return of spontaneous circulation. Secondary outcomes indicated a significant improvement in heart rate, blood pressure, oxygen saturation, and other outcomes. Conclusions: abdominal compressions have been shown to be beneficial. However, further clinical studies are needed to identify the best execution method and its impacts.

RESUMEN Objetivos: mapear la evidencia científica sobre el uso de compresiones abdominales durante la reanimación cardiopulmonar en pacientes con paro cardíaco. Métodos: esta es una revisión de alcance basada en la pregunta: "¿Cuál es la evidencia con respecto al uso de compresiones abdominales durante la reanimación cardiopulmonar en pacientes con paro cardíaco?". Se recopilaron publicaciones hasta agosto de 2022 de ocho bases de datos. Se utilizó la extensión de Informes Preferidos para Revisiones Sistemáticas y Metaanálisis para Revisiones de Alcance. Resultados: se incluyeron diecisiete publicaciones. La población general identificada estaba compuesta por adultos y personas mayores. El resultado primario reveló tasas significativas de retorno de la circulación espontánea. Los resultados secundarios indicaron una mejora significativa en la frecuencia cardíaca, la presión arterial, la saturación de oxígeno y otros resultados. Conclusiones: las compresiones abdominales han demostrado ser beneficiosas. Sin embargo, se necesitan más estudios clínicos para identificar el mejor método de ejecución y sus impactos.

RESUMO Objetivos: mapear as evidências científicas sobre o uso de compressões abdominais durante a reanimação cardiopulmonar em pacientes com parada cardiorrespiratória. Métodos: trata-se de uma revisão de escopo, baseada na questão: "quais são as evidências sobre o uso de compressões abdominais durante a reanimação cardiopulmonar em pacientes com parada cardiorrespiratória?". Foram coletadas as publicações até agosto de 2022 em oito bases de dados. Foi utilizado o Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews. Resultados: incluiu-se 17 publicações. O público geral identificado foi composto por adultos e idosos. O desfecho primário evidenciou taxas significativas de retorno da circulação espontânea. Os desfechos secundários indicaram melhora significativa na frequência cardíaca, pressão arterial, saturação de oxigênio e outros resultados. Conclusões: as compressões abdominais mostraram-se benéficas. No entanto, mais estudos clínicos são necessários para identificar o melhor método de execução e seus impactos.

Parada cardiorrespiratória na pandemia por coronavírus: revisão compreensiva da literatura / Cardiorespiratory arrest in a coronavirus pandemic: comprehensive literature review / Paro cardiorrespiratorio en una pandemia de coronavirus: revisión exhaustiva de la literatura

Objetivo: apresentar atualizações para a ressuscitação cardiopulmonar em pacientes suspeitos e confirmados com COVID-19. Método: revisão compreensiva da literatura, com síntese narrativa das evidências de diretrizes e recomendações da Organização Mundial de Saúde, Associação de Medicina Intensiva Brasileira, American Heart Association, Resuscitation Council UK, American College of Surgions Committee on Trauma e National Association of Emergency Medical Technicians. Resultados: as principais atualizações trazem informações sobre especificidades das manobras de ressuscitação cardiopulmonar; preparação do ambiente, recursos humanos e materiais, reconhecimento da parada cardiorrespiratória e ações iniciais; estratégias de ventilação e acesso invasivo da via aérea; ajustes do ventilador mecânico e manobras de ressuscitação cardiopulmonar em pacientes pronados. Considerações finais: profissionais de saúde envolvidos no atendimento à parada cardiorrespiratória de pacientes suspeitos e/ou confirmados com COVID-19 podem encontrar inúmeros desafios, portanto devem seguir com rigor o protocolo estabelecido para maximizar a efetividade das manobras de ressuscitação e minimizar o risco de contágio pelo vírus e sua disseminação.

Objective: to present updates for cardiopulmonary resuscitation in suspected and confirmed patients with COVID-19. Method: comprehensive literature review with narrative synthesis of the evidence of guidelines and recommendations from World Health Organization, Associação de Medicina Intensiva Brasileira, American Heart Association, Resuscitation Council UK, American College of Surgions Committee on Trauma and National Association of Emergency Medical Technicians. Results: the main updates bring information about the specifics of cardiopulmonary resuscitation maneuvers; preparation of the environment and human and material resources, recognition of cardiorespiratory arrest and initial actions; ventilation and invasive airway access strategies; mechanical ventilator adjustments and cardiopulmonary resuscitation maneuvers in patients in the prone position. Final considerations: health professionals involved in the care of cardiorespiratory arrest of suspected and/or confirmed patients with COVID-19 can face numerous challenges, so they must strictly follow the protocol established to maximize the effectiveness of resuscitation maneuvers and minimize the risk of contagion by the virus and its spread.

Objetivo: apresentar actualizaciones para la reanimación cardiopulmonar en pacientes sospechos os y confirmados con COVID-19. Método: revisión exhaustiva de la literatura con síntesis narrativa de la evidencia de guías y recomendaciones de la Organización Mundial de la Salud, Associação de Medicina Intensiva Brasileira, American Heart Association, Resuscitation Council UK, American College of Surgions Committee on Trauma and National Association of Emergency Medical Technicians. Resultados: las principales actualizaciones aportan información sobre los detalles de las maniobras de reanimación cardiopulmonar; preparación del medio ambiente y recursos humanos y materiales, reconocimiento de paro cardiorrespiratorio y acciones iniciales; estrategias de ventilación y acceso invasivo a las vías aéreas; ajustes del ventilador mecánico y maniobras de reanimación cardiopulmonar en pacientes en decúbito prono. Consideraciones finales: los profesionales de la salud involucrados en la atención del paro cardiorrespiratorio de pacientes sospechosos y/o confirmados con COVID-19 pueden enfrentar numerosos desafíos, por lo que deben seguir estrictamente el protocolo establecido para maximizar la efectividad de las maniobras de reanimación y minimizar el riesgo de contagio por el virus y supropagación.

Effect of Watch-Type Haptic Metronome on the Quality of Cardiopulmonary Resuscitation: A Simulation Study / 대한의료정보학회지

OBJECTIVES: The aim of this study was to test the applicability of haptic feedback using a smartwatch to the delivery of cardiac compression (CC) by professional healthcare providers. METHODS: A prospective, randomized, controlled, case-crossover, standardized simulation study of 20 medical professionals was conducted. The participants were randomly assigned into haptic-first and non-haptic-first groups. The primary outcome was an adequate rate of 100–120/min of CC. The secondary outcome was a comparison of CC rate and adequate duration between the good and bad performance groups. RESULTS: The mean interval between CCs and the number of haptic and non-haptic feedback-assisted CCs with an adequate duration were insignificant. In the subgroup analysis, both the good and bad performance groups showed a significant difference in the mean CC interval between the haptic and non-haptic feedback-assisted CC groups—good: haptic feedback-assisted (0.57–0.06) vs. non-haptic feedback-assisted (0.54–0.03), p < 0.001; bad: haptic feedback-assisted (0.57–0.07) vs. non-haptic feedback-assisted (0.58–0.18), p = 0.005—and the adequate chest compression number showed significant differences— good: haptic feedback-assisted (1,597/75.1%) vs. non-haptic feedback-assisted (1,951/92.2%), p < 0.001; bad: haptic feedbackassisted (1,341/63.5%) vs. non-haptic feedback-assisted (523/25.4%), p < 0.001. CONCLUSIONS: A smartwatch cardiopulmonary resuscitation feedback system could not improve rescuers' CC rate. According to our subgroup analysis, participants might be aided by the device to increase the percentage of adequate compressions after one minute.

Ordem de não reanimar pacientes em fase terminal sob a perspectiva de médicos / Terminally ill patients' do not resuscitate orders from the doctors' perspective / La orden de no reanimar a los pacientes en fase terminal bajo la perspectiva de los médicos

Ordem de não reanimar consiste na manifestação expressa da recusa de reanimação cardiopulmonar por paciente com doença avançada em progressão. Objetivou-se descrever a atitude dos médicos em relação à ordem de não reanimar e à necessidade de sua normatização. Foi aplicado questionário a 80 médicos inscritos na delegacia do Conselho Regional de Medicina de Joaçaba/SC, Brasil. Verificou-se que 90% dos participantes conheciam o significado dessa ordem, 86,2% concordavam em acatá-la, 91,2% consideravam importante seu registro em prontuário e 92,5% consideravam oportuna a emissão de normatização a respeito. Concluiu-se que a maioria dos médicos tinha conhecimento sobre Ordem de Não Reanimar, concordava em respeitá-la, valorizava seu registro em prontuário e desejava a normatização por parte dos órgãos competentes.

The do-not-resuscitate order is the explicit statement by patients with advanced disease in progression refusing cardiopulmonary resuscitation. This study aimed to describe the attitude of physicians in relation to the this order and the need for its regulation. A questionnaire was applied to 80 physicians in the medical bureau of the Regional Council of Medicine of Joacaba/SC, Brazil. It was found that 90% of the respondents knew the meaning of do-not-resuscitate, 86.2% agreed to respect it, 91.2% considered it important to be registered in medical records and 92.5% understood as opportune the issuance of a regulation in this regard. It was concluded that most doctors knew about the do-not-resuscitate order, agreed to respect it, valued its registration in medical records and wanted its regulation by the relevant bodies.

La orden de no reanimar es la manifestación expresa de rechazo de la reanimación cardiopulmonar por parte de pacientes portadores de una enfermedad avanzada en progresión. Este estudio tuvo como objetivo describir la actitud de los médicos con respecto a esta orden y la necesidad de su regulación. Se aplicó un cuestionario a 80 médicos (50% del total) inscriptos en el distrito del Consejo Regional de Medicina de Joaçaba, Santa Catarina, Brasil. Se encontró que el 90% de los encuestados conocían el significado de esta orden, el 86,2% estaban de acuerdo en cumplirla, el 91,2% consideraban importante el registro en el historial médico y el 92,5% juzgaban oportuna la existencia de una regulación al respecto. Se concluyó que la mayoría de los médicos tenía conocimiento de la orden de no reanimar, estaba de acuerdo en respetarla, valoraba su registro en el historial médico y deseaba su regulación por parte de las instituciones competentes.

Can a Rescuer Gazing Point Intervention Improve the Depth of Chest Compressions in Hands-only Cardiopulmonary Resuscitation? A Randomized Simulation Study

PURPOSE: The aim of this study was to evaluate whether a simple verbal instruction regarding the rescuer gazing point can improve the depth of chest compressions (CCs) in the hands-only cardiopulmonary resuscitation (CPR). METHODS: Participants who took part in basic life support training courses for lay-rescuers were eligible for inclusion in this prospective, single-blinded, cluster randomized controlled study. After the training courses, both the control and the intervention groups performed the hands-only CPR for two minutes on a manikin placed on the ground. Immediately prior to CCs, instructors provided the intervention group with brief verbal instructions to look in the opposite direction of the adducted arm after placing the heel of the hand on the mid-sternum. RESULTS: One hundred and twenty-two participants (61 for each group) were enrolled in this study. The intervention group showed significantly deeper CCs than the control group (47.9±8.2 mm vs. 43±8.4 mm, p<0.01); however, there were no significant differences between the two groups in the quality of chest recoil, CC rate, or duty cycle of CCs. However, the frequency of incorrect hand position was higher in the intervention group when compared with the control group (10.3 [2.3-35.7] vs. 5.7 [0-33.0], p=0.036) CONCLUSION: Instructions to look in the opposite direction of the adducted arm during CCs improved the mean depth of CCs without significant adverse effects on the quality of recoil, CC rate, or duty cycle of CCs. However, the frequency of incorrect hand position was higher in the intervention group than the control group.

Changes of One-handed Chest Compression Qualities According to Rescuer Fatigue and the Effects of Alternating Hands in the Prehospital Setting: Prospective Randomized Pilot Study using Pediatric Manikin Simulation Trial

PURPOSE: One-handed chest compression (OHCC) technique is performed by one hand. Therefore chest compression (CC) depth might decrease rapidly. This study will evaluate the patterns of CC depth decaying in performing OHCC and assess the effects of alternating the hand which performs CC on the patterns of CC depth decaying. METHODS: This study was designed as a prospective randomized manikin simulation trial. Students of medical college participated. First, 10 students performed OHCC (chest compression:ventilation=30:2) in a pediatric manikin lying on a hard floor for 5 minutes (baseline study). After the baseline study, 32 students were recruited and randomized to group A and B. Group A performed OHCC with hand shift every other cycle (test 1). Group B performed OHCC with hand shift when they feel fatigue (test 2). The compression data were collected using the CPRmeter. The mean compression depths (MCD) were calculated at one minute intervals using the Q-CPR review software. The heart rates were monitored and the fatigue scales were collected every 1 minute. RESULTS: The MCD values were decreased significantly after 1 minute in the baseline study (p<0.05). However they were not changed in test 1 and decreased significantly after 4 minutes in test 2 (p<0.05). The heart rate and the fatigue scales were increased significantly with time in all tests (p<0.05). CONCLUSION: When OHCC was performed without shifting the hand which performed CC, the MCD decreased significantly after 1 minute. However, we could delay the time of decreasing MCD by shifting the hand which performed CC.

Right Ventricular Rupture Caused by Prolonged Cardiopulmonary Resuscitation after Sudden Cardiac Arrest / 대한내과학회지

A 46-year-old male arrived at the emergency department with acute dyspnea. On the way to the hospital, heart massage was performed in the ambulance due to asystole on electrocardiography. After 2 hr of resuscitation, sinus rhythm was restored. Extracorporeal life support and an intra-aortic balloon pump were applied due to cardiogenic shock, but the patient showed sustained hypotension. Echocardiography showed moderate pericardial effusion with physiological evidence of cardiac tamponade; emergency pericardiocentesis was performed, which produced bloody pericardial fluid. An explorative sternotomy revealed a massive hematoma in the mediastinum and right ventricular (RV) free wall rupture. After primary repair, echocardiography showed improved left ventricular systolic function and the patient was stable clinically. This case presents RV free wall rupture as an unusual complication of prolonged heart massage. Heart rupture should be considered in hemodynamically unstable patients after prolonged heart massage.

The Effect of Counting Numbers out for Giving Breaths on the Interrupting Time and Fraction of Chest Compressions in 2-rescuer Cardiopulmonary Resuscitation: A Manikin Pilot Study

PURPOSE: The aim of this study was to estimate the effect of counting numbers out for giving breaths on the interruption time (IT) of chest compressions (CCs) and chest compression fraction (CCF) in the 2-rescuer cardiopulmonary resuscitation (CPR). METHODS: Thirty medical students were enrolled in this randomized control simulation study, and were randomly divided into the control group and the study group. Both groups performed 2-rescuer CPR for 5-cycles with giving breaths using a bag-mask. Only participants in the study group were instructed to count numbers out for each breath verbally ("one, two") at the end point of each inspiration period and immediately perform CCs at the point of counting "two". RESULTS: However, no differences in terms of depth, rate, incorrect location, and duty cycle of CCs, as well as ventilation volume of each breath, time to delivery of two breaths, and counts of breathing during 1 minute were observed between the two groups. CONCLUSION: The study group had significantly shorter IT and higher CCF compared with the control group. And no significant differences in the other measured parameters of CPR quality were observed between the two groups.

Competencias en reanimación cardiopulmonar pediátrico en residentes del Hospital del Niñ@ Manuel Ascencio Villarroel / Cardiopulmonary pediatric reanimation skills in residents from the Niñ@ Manuel Ascencio Villarroel hospital

El paro cardiorrespiratorio es la vía final de una serie de condiciones y enfermedades graves. Motivo por el cual la reanimación cardiopulmonar es importante para la sobrevivencia y secuelas que podría tener en los niños que se encuentran en estado crítico. El objetivo de este trabajo fue evaluar en conocimiento teórico y práctico sobre reanimación pediátrico a los residentes de la especialidad de pediatría del Hospital del Niño Manuel Ascencio Villarroel de Cochabamba. El método de estudio aplicado fue de tipo observacional descriptivo; cuya evaluación fue por tribunal especializado en resucitación cardiopulmonar pediátrico mediante una prueba estructurada y examen práctico con estaciones clínicas en muñecos simuladores. En cuanto los resultados se pudieron evidenciar que existe marcada deficiencia en conocimientos teóricos en las aéreas de resucitación cardiopulmonar básica, acceso vascular, arritmias y administración de medicación, en prevención de paro cardiorrespiratorio se observó buena respuesta en la mayoría de los participantes. En cuanto al grado de residencia los de primer año tuvieron mala respuesta en general, en cambio entre los residentes de segundo y tercer año no existe diferencia significativa. Finalmente se concluye que la mayoría de los residentes no han realizado cursos o capacitaciones sobre el tema; el rendimiento tanto teórico como práctico fue deficiente con marcada diferencia entre los residentes de primer año y superiores. Existe mucha deficiencia en manejo teórico practico de ventilación adecuada con máscara y bolsa, manejo de arritmias y también masaje cardiaco.

The cardiac arrest is the final outcome of a serial number of conditions and illnesses. For which reason cardiopulmonary reanimation is important for the survival and aftermath that it may have on children who are in critical condition. The aim of this work it was to evaluate the theoretical and practical knowledge about pediatric resuscitation in residents from pediatric specialty in the Niño Manuel Ascencio Villarroel Hospital from Cochabamba. A descriptive observational study was applied; whose evaluation it was performed by a specialized court in cardiopulmonary reanimation pediatric through a structural test and practical exam in simulators dolls from clinical stations. In the results it can be show that there is marked deficiency in theoretical knowledge about basic cardiopulmonary reanimation area, vascular access, arrhythmias and drugs administration; but the cardiorespiratory arrest prevention showed good response in most of the participants. Regarding the degree of residence, generally the freshmen had poor response, however residents between second and third year had no significant difference. Finally it was concluded that most of the residents had not realized courses about this topic; the theoretical and practical performance was deficient with marked difference in the freshmen and senior years, but no difference between the second and third year specialty. There is much theoretical and practical deficieney in the practice of adequate ventilation management with mask and bag, arrhythmias management and heart massage.

A Telephone Method for Helping Lay Rescuers Perform High Quality Cardiopulmonary Resuscitation

PURPOSE: Dispatcher-assisted telephone instruction during cardiopulmonary resuscitation (CPR) improves the quality of CPR performed by laypersons. However, in Korea, CPR instruction guidelines for bystanders have not made. We therefore studied the effects of verbal instruction on the quality of chest compression. METHODS: Data from two randomized, double-blinded, controlled trials using identical methodology were combined to obtain 175 records for analysis. Subjects were randomized into either a "push as hard as you can and fast" (n=87) or "push down 5~6 cm, 100~120 rate/min" (n=88), verbal instructions in the 2011 Korea Guidelines for Cardiopulmonary Resuscitation (CPR) and Emergency Cardiovascular Care (ECC). Data were recorded via a Resusci(R) Anne SkillReporter(TM), Laerdal Medical mannequin. Primary outcome measures included chest compression depth and chest compression rate per minute. RESULTS: The average compression depth and speed of chest compressions did not significantly differ between the two verbal instructions. CONCLUSION: The verbal istructions provided by telephone based on the 2011 Korean Guidelines for CPR and ECC are not effective. The instructions for high quality CPR of layperson should therefore be studied.

Center of the Chest Versus Inter-nipple Line in the Selection of a Chest Compression Site by Novice Rescuers

PURPOSE: The aim of this study was to compare the distribution and risk from hand positions applied at the center of the chest (CoC) versus the inter-nipple line (INL) during external chest compression by novice rescuers. METHODS: This simulation study included 105 participants. The participants were given photographs of the unexposed male chest and asked to mark a cross at the center of the chest and at the midpoint of the inter-nipple line. The range of contact with the chest was estimated by measuring the participants' palm width. The median and distribution of the two points were then compared and analyzed to determine whether the range in contact with the chest involved the xiphoid process. RESULTS: The level of the INL was approximately 0.8 cm higher at the sternum than the CoC (p<0.001), while the standard deviation of the CoC [1.8(0.6-3.8)] was higher than that of the INL [1.2(0.4-2.4)] (p<0.001). There were more cases in which the palm range involved the xiphoid process in the CoC group [15(14.3%)] than the INL group [1(0.9%)] (p<0.001). CONCLUSION: For male adult patients, chest compression at the level of the INL by novice rescuers is safer and more intensive than compression at the level of the CoC.

A Comparison of Compression Rates on the Quality of Cardiopulmonary Resuscitation

PURPOSE: In cardiopulmonary resuscitation (CPR) there are different opinions on the compression rate that should be applied. The aim of this study was to compare the total number of adequate compressions delivered during a five-minute period among four groups of lay persons (> or =139 min-1, 129-138, 114-128, and 100 times/minute and a depth of >5 cm for five minutes. A total of 86 participants were then divided into four groups based on their mean compression rate. Age, sex, and body mass index were analyzed as factors affecting the compression rates. RESULTS: The group delivering a compression rate above 139 compressions min-1 performed better than those delivering below 114 compressions min-1 (p=0.03). There was no significant difference in the mean compression depth (p=0.13), percentage of incomplete chest recoil (p=0.277), or the percentage of incorrect hand positioning (p=0.091). All participants (except five) performed chest compressions at a rate above 100 compressions min-1. CONCLUSION: Our results suggest that a chest compression rate above 139 compressions min-1 does not deteriorate the quality of compressions compared to a lower chest compression rate (below 114 min-1) during a five-minute period. Most untrained lay people performed chest compressions well, within a range of 100~150 min-1.

Avaliação da frequência e profundidade das compressões torácicas realizadas com o uso de metrônomo / Evaluation of frequency and depth of chest compressions performed with the use of metronome

JUSTIFICATIVA E OBJETIVOS: Dispositivos como o metrônomo tem demonstrado aumentar a qualidade da reanimação cardiopulmonar (RCP). O objetivo deste estudo foi avaliar a frequência e a profundidade das compressões torácicas (CT) realizadas com e sem o auxílio do metrônomo.MÉTODO: Estudo prospectivo com 44 estudantes de medicina do 1º ano que foram avaliados imediatamente após o curso "Heartsaver DEA". Foi utilizado metrônomo durante o curso,na frequência de 100 por minuto, a fim de auxiliar as CT. Os estudantes realizaram um minuto de CT utilizando o manequim AmbuMan Prolife, parte sem o auxílio do metrônomo (Grupo A) e a outra parte com o auxílio do dispositivo (Grupo B), que permaneceu na frequência de 100 por minuto. Cada avaliação foi filmada e a análise das compressões foi realizada por um instrutor que desconhecia cada grupo. RESULTADOS: A média de idade e a porcentagem do sexo masculino no Grupo A e no Grupo B foram de 20,7 ± 3,5 versus 22,5± 1,9 (p = 0,004) e 45,4% versus 54,6% (p = 0,763), respectivamente. Durante um minuto de compressões torácicas, para os Grupos A e B, a média da frequência foi de 110,3 ± 14,2 versus103,6 ± 9,6, respectivamente (p = 0,37) e a média da porcentagem de compressões com profundidade adequada foi de 39,6% ± 34,7 versus 87,4% ± 21,7, respectivamente (p < 0,001). CONCLUSÃO: O uso do metrônomo durante o treinamento foi efetivo, demonstrado pela frequência correta obtida em ambos os grupos. A profundidade das compressões foi melhor no grupo que utilizou o metrônomo, talvez pelo fato dos estudantes concentrarem maior atenção na profundidade das compressões já que o dispositivo auxiliava na sua frequência.

BACKGROUND AND OBJECTIVES: Devices such as metronome have demonstrated to increase the quality of cardiopulmonary resuscitation (CPR). The objective was evaluating the frequency and depth of chest compressions (CC) performed with and without the aid of the metronome.METHOD: This prospective study involving 44 medical students coursing the first year, were evaluated immediately after the "Heartsaver AED" course. During the training, a metronome was used to guide the compressions frequency (100 per minute). The students performed CC during one minute, both using AmbuMan Prolife manikins, a group without metronome (Group A) and another group with metronome (Group B) guidance with "tock" prompts for compressions, at rate of 100 per minute. Each session was filmed and analysis of the compressions was performed by an instructor without knowledge of each group. RESULTS: The average age and percentage of male gender of Group A and Group B was 20.7 ± 3.5 vs. 22.5 ± 1.9 (p = 0.004) and 45.4% vs. 54.6% (p = 0.763), respectively. During 1 min of CC, considering Group A and Group B, the average rate of compressions was 110.3 ± 14.2 vs. 103.6 ± 9.6, respectively (p= 0.37) and the average percentage of correct depth compression was 39.6% ± 34.7 vs. 87.4% ± 21.7, respectively (p < 0.001). CONCLUSION: Using the metronome during training was effective, demonstrated by the frequency of correct CC in both groups. The greatest depth of CC in the group with metronome may be related to less concern with the frequency due to the presence of the stimulus sound and greater focus on appropriate depth of compressions.

Cardiopulmonary Resuscitation: New Concept / 결핵및호흡기질환

Cardiopulmonary resuscitation (CPR) is a series of life-saving actions that improve the chances of survival, following cardiac arrest. Successful resuscitation, following cardiac arrest, requires an integrated set of coordinated actions represented by the links in the Chain of Survival. The links include the following: immediate recognition of cardiac arrest and activation of the emergency response system, early CPR with an emphasis on chest compressions, rapid defibrillation, effective advanced life support, and integrated post-cardiac arrest care. The newest development in the CPR guideline is a change in the basic life support sequence of steps from "A-B-C" (Airway, Breathing, Chest compressions) to "C-A-B" (Chest compressions, Airway, Breathing) for adults. Also, "Hands-Only (compression only) CPR" is emphasized for the untrained lay rescuer. On the basis of the strength of the available evidence, there was unanimous support for continuous emphasis on high-quality CPR with compressions of adequate rate and depth, which allows for complete chest recoil, minimizing interruptions in chest compressions and avoiding excessive ventilation. High-quality CPR is the cornerstone of a system of care that can optimize outcomes beyond return of spontaneous circulation (ROSC). There is an increased emphasis on physiologic monitoring to optimize CPR quality, and to detect ROSC. A comprehensive, structured, integrated, multidisciplinary system of care should be implemented in a consistent manner for the treatment of post-cardiac arrest care patients. The return to a prior quality and functional state of health is the ultimate goal of a resuscitation system of care.

Atualização das diretrizes de ressuscitação cardiopulmonar de interesse ao anestesiologista / Spinal myoclonus after subarachnoid anesthesia with bupivacaine

JUSTIFICATIVA E OBJETIVOS: As novas diretrizes de ressuscitação cardiopulmonar (RCP) enfatizam a importância das compressões torácicas de alta qualidade e modificam algumas rotinas. Este artigo tem por objetivo revisar as principais alterações na reanimação praticada pelo médico anestesiologista. CONTEÚDO: A ênfase para realização das compressões torácicas de alta qualidade, com frequência e profundidade adequadas, permitindo retorno total do tórax e com interrupção mínima nas compressões, assume posição de destaque nesta atualização. Não se deve levar mais de dez segundos verificando o pulso antes de iniciar a RCP. A relação universal de 30:2 é mantida, modificando-se sua ordem de realização, iniciando-se pelas compressões torácicas, para, em seguida, prosseguir para as vias aéreas e respiração (C-A-B, em vez de A-B-C). O procedimento "ver, ouvir e sentir se há respiração" foi removido do algoritmo e o uso de pressão cricoidea durante as ventilações, em geral, não é mais recomendado. A frequência das compressões foi modificada para um mínimo de cem por minuto, em vez de aproximadamente cem por minuto, sendo sua profundidade em adultos alterada para 5 cm, em lugar da faixa antes recomendada de 4 a 5 cm. Choque único é mantido, devendo ser de 120 a 200 J quando bifásico, ou 360 J quando monofásico. No suporte avançado de vida, o uso de capnografia e capnometria para confirmação da intubação e monitoração da qualidade da RCP é uma recomendação formal. A atropina não é mais recomendada para uso rotineiro no tratamento da atividade elétrica sem pulso ou assistolia. CONCLUSÕES: É importante a atualização quanto às novas diretrizes de RCP, sendo enfatizado o contínuo aprendizado. Isso irá melhorar a qualidade da reanimação e sobrevida de pacientes em parada cardíaca.

BACKGROUND AND OBJECTIVES: The new cardiopulmonary resuscitation (CPR) guidelines emphasize the importance of high-quality chest compressions and modify some routines. The objective of this report was to review the main changes in resuscitation practiced by anesthesiologists. CONTENTS: The emphasis on high-quality chest compressions with adequate rate and depth allowing full recoil of the chest and with minimal interruptions is highlighted in this update. One should not take more than ten seconds checking the pulse before starting CPR. The universal relationship of 30:2 is maintained, modifying its order, initiating with chest compressions, followed by airways and breathing (C-A-B instead of A-B-C). The procedure "look, listen, and feel whether the patient is breathing" was removed from the algorithm, and the use of cricoid pressure during ventilations is not recommended any more. The rate of chest compressions was changed for at least one hundred per minute instead of approximately one hundred per minute, and its depth in adults was changed to 5 cm instead of the prior recommendation of 4 to 5 cm. The single shock is maintained, and it should be of 120 to 200 J when it is biphasic; and 360 J when it is monophasic. In advanced cardiac life support, the use of capnography and capnometry to confirm intubation and monitoring the quality of CPR is a formal recommendation. Atropine is no longer recommended for routine use in the treatment of pulseless electrical activity or asystole. CONCLUSIONS: Updating the phases of the new CPR guidelines is important, and continuous learning is recommended. This will improve the quality of resuscitation and survival of patients in cardiac arrest.

JUSTIFICATIVA Y OBJETIVOS: Las nuevas directrices de resucitación cardiopulmonar (RCP), destacan la importancia de las compresiones torácicas de alta calidad y modifican algunas rutinas. Este artículo tiene el objetivo de revisar las principales alteraciones en la reanimación practicada por el médico anestesista. CONTENIDO: El énfasis para la realización de las compresiones torácicas de alta calidad, con la frecuencia y la profundidad adecuadas, permitiendo el retorno total del tórax y con interrupción mínima en las compresiones, asume una posición de destaque en esta actualización. No debemos llevar más de 10 segundos verificando el pulso antes de iniciar la RCP. La relación universal de 30:2 se mantiene, modificando su orden de realización, e iniciándose por las compresiones torácicas para, enseguida, proseguir hacia las vías aéreas y la respiración (C-A-B, en vez de A-B-C). El procedimiento "ver, oír y sentir si hay respiración", fue retirado del algoritmo, y el uso de presión cricoide durante las ventilaciones, en general no se recomienda más. La frecuencia de las compresiones fue modificada para un mínimo de 100 por minuto, en vez de aproximadamente 100 por minuto, siendo su profundidad en adultos alterada para 5 cm, en lugar de la franja antes recomendada de 4 a 5 cm. El choque único se mantiene y debe ser de 120 a 200 J, cuando es bifásico, o 360 J, cuando es monofásico. En el soporte avanzado de vida, el uso de capnografía y capnometría para la confirmación de la intubación y de la monitorización de la calidad de la RCP, es una recomendación formal. La atropina no se recomienda más para el uso de rutina en el tratamiento de la actividad eléctrica sin pulso o asistolia. CONCLUSIONES: Es importante la actualización sobre las nuevas directrices de RCP, destacando su continuo aprendizaje. Eso mejorará la calidad de la reanimación y la sobrevida de los pacientes en una parada cardíaca.

A clinical study on the neonatal continuous chest compression cardiopulmonary resuscitation by different moduses of artificial respiration / 中国基层医药

Objective To investigate the easier and more effective moduses of artificial respiration to the neonatal continuous chest compression eardiopulmonary resuscitation. Methods The experience of the treatment on 66 inpatient neonates(with 84 vices cardiac arrest) by continuous chest compression cardiopulmonary resuscitation was summarized. Based on different moduses of artificial respiration matched with mask-gasbag pressure breathing or tracheal intubation pressure breathing to cardiopulmonary resuscitation(CPR), and according to the principles of therandomized block design,sixty-six neonates in cardiac arrest were randomly divided into two groups of A and B. Fun-damental therapeutics in these two groups were alike. A group(38 cases with 53 vices cardiac arrest) was with mask-gasbag pressure breathing. B group(28 cases with 31 vices cardiac arrest) was with tracheal intubation gasbag pres-sure breathing. Time of cardiac arrest (Tca), time of cardiac restore independent rhythm(Tr), Time of cardiopul-monary resuscitation completed(Tc), achievement ratio of cardiopulmonary resuscitation, and 24 hours survival rateof these two groups were compared. Results Compared with B group, there was no significant deviation of Pca, Tr,Tc, the successful rate of CPR and 24 hours survival rate in A group. Comparing A group to B group, the Tea[ (0.99±0.75)rain vs (0.92±0.69)min, P = 0.69];Tr[(3.58±2.15)rain vs (3.66±2.01)min, P = 0.87];Tc [(23.28±9.26)min vs (23.73±9.51)min,P=0.84];suecessful rate of CPR [88.68% vs 83.87% ,P>0.05];24h survival rate [84.21% vs 82.14 %, P > 0.05 ]. Conclusion The mask-gasbag pressure breathing was an easy,safe and effective artificial respiration method for the neonatal continuous chest compression cardiopulmonary resusci-tation. Only in a few eases with airway resistance heightening was the modus of tracheal intubation gasbag pressure breathing applied.