Cardiopulmonary resuscitation (CPR) is a very important treatment after cardiac arrest. The optimal treatment strategy of CPR is uncertain. With the accumulation of clinical medical evidence, the CPR treatment recommendations have been changed. This article will review the current hot issues and progress, including the pathophysiological mechanisms of CPR, how to achieve high-quality chest compression, how to achieve CPR quality monitoring, how to achieve optimal CPR for different individuals and how to use antiarrhythmic drugs.
Objective To investigate the relationship between thrombocytopenia after the restoration of spontaneous circulation and short-term prognosis of patients with in-hospital cardiac arrest. Methods The demographic data, post-resuscitation vital signs, post-resuscitation laboratory tests, and the 28-day mortality rate of patients who experienced in-hospital cardiac arrest at the Emergency Department of West China Hospital, Sichuan University between January 1st, 2016 and December 31st, 2016 were retrospectively analyzed. Logistic regression was used to analyze the correlation between thrombocytopenia after the return of spontaneous circulation and the 28-day mortality rate in these cardiac arrest patients. Results Among the 285 patients included, compared with the normal platelet group (n=130), the thrombocytopenia group (n=155) showed statistically significant differences in red blood cell count, hematocrit, white blood cell count, prothrombin time, activated partial thromboplastin time, and international normalized ratio (P<0.05). The 28-day mortality rate was higher in the thrombocytopenia group than that in the normal platelet group (84.5% vs. 71.5%, P=0.008). Multiple logistic regression analysis indicated that thrombocytopenia [odds ratio =2.260, 95% confidence interval (1.153, 4.429), P=0.018] and cardiopulmonary resuscitation duration [odds ratio=1.117, 95% confidence interval (1.060, 1.177), P<0.001] were independent risk factors for 28-day mortality in patients with in-hospital cardiac arrest. Conclusion Thrombocytopenia after restoration of spontaneous circulation is associated with poor short-term prognosis in patients with in-hospital cardiac arrest.
Currently, cardiac arrest has become a major public health problem, which has a high incidence rate and a high mortality rate in humans. With the continuous advancement of cardiopulmonary resuscitation techniques, the overall prognosis of cardiac arrest victims is gradually improved. However, cardiac arrest events under special circumstances are still serious threats to human health. This article reviews the progress of epidemiology, pathogenesis, treatment characteristics, and key points of cardiopulmonary resuscitation in those special cardiac arrest events associated with trauma, poisoning, drowning and pregnancy.
American Heart Association issued American Heart Association Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care in October 2020. A sixth link, recovery, has been added to both the adult out-of-hospital cardiac arrest chain and in-hospital cardiac arrest chain in this version of the guidelines to emphasize the importance of recovery and survivorship for resuscitation outcomes. Analogous chains of survival have also been developed for adult out-of-hospital cardiac arrest and in-hospital cardiac arrest. The major new and updated recommendations involve the early initiation of cardiopulmonary resuscitation by lay rescuers, early administration of epinephrine, real-time audiovisual feedback, physiologic monitoring of cardiopulmonary resuscitation quality, double sequential defibrillation not supported, intravenous access preferred over intraosseous, post-cardiac arrest care and neuroprognostication, care and support during recovery, debriefings for rescuers, and cardiac arrest in pregnancy. This present review aims to interpret these updates by reviewing the literature and comparing the recommendations in these guidelines with previous ones.
The body of patient undergoing cardiopulmonary resuscitation after cardiac arrest experiences a process of ischemia, hypoxia, and reperfusion injury. This state of intense stress response is accompanied with hemodynamic instability, systemic hypoperfusion, and subsequent multiple organ dysfunction, and is life-threatening. Pulmonary vascular endothelial injury after cardiopulmonary resuscitation is a pathological manifestation of lung injury in multiple organ injury. Possible mechanisms include inflammatory response, neutrophil infiltration, microcirculatory disorder, tissue oxygen uptake and utilization disorder, etc. Neutrophils can directly damage or indirectly damage lung vascular endothelial cells through activation and migration activities. They also activate the body to produce large amounts of oxygen free radicals and release a series of damaging cytokines that further impaire the lung tissue.
This paper introduces the development and animal tests of a miniaturized electrical chest compression device. Based on pulse width modulation technology produced by micro control unit, the device can control the frequency and depth of the compression accurately, as well as perform real-time adjustment. Therefore, it can perform continuous and stable chest compression for long time, which may increase the successful rate of cardiopulmonary resuscitation (CPR). Besides, the device can also produce different types of compression waveforms, including trapezoidal and triangular waveforms. Then, the performance and efficacy of the device was assessed with a rat model of asphyxial cardiac arrest (CA).
ObjectiveTo investigate the effects of different peak flow on the airway pressure to explore a preferable value of peak flow in ventilation during cardiopulmonary resuscitation (CPR) under volume control ventilation (VCV) mode and decreasing-wave. Methods30 patients who underwent CRP in the emergency unit between January 2012 and 2014 was recruited in the study. When the chest compressions came into a stable state by a same doctor,the peak flow was set at 50 L/min and 30 L/min respectively while other parameters fixed in the same patient. Then the pressure-time curve of a respiratory cycle was randomly frozen to achieve the highest peak pressure in inspiratory phase. ResultsThe highest peak airway pressures were (54.1±4.9)cm H2O and (35.5±5.3)cm H2O when the peak flow were set at 50 L/min and 30 L/min respectively with significant difference. The incidence of peak airway pressure greater than 40 cm H2O was 96.7% and 26.7%,and the incidence of peak airway pressure greater than 50 cm H2O was 76.7% and 0%,respectively. Compared with 50 L/min,the peak flow of 30 L/min obviously reduced the peak pressure (P=0.000). ConclusionIn the mechanical ventilation during CPR using VCV mode and decreasing-wave,compared with peak flow of 50 L/min,smaller peak flow of 30 L/min can significantly reduce peak airway pressure,and significantly reduce the adverse effects to ventilation by repeated violent changes in airway pressure caused by continuing chest compressions,and make airway peak pressure under 40 cm H2O in most patients,so it is a reasonable and safe choice.
Objective To evaluate the effectiveness of fluid therapy on an early goal-directed approach to resuscitation basis and the standard fluid therapy of adequate resuscitation on the prognosis of severe acute pancreatitis （SAP）in early stage. Methods The clinical data of SAP patients admitted to surgical intensive care unit within 72 h after onset of symptoms from January 2000 to November 2011 were analyzed retrospectively. A total of 97 patients with a confirmed diagnosis of SAP were divided into two groups based on whether adopting the early goal-directed fluid resuscitation strategies or not. Patients admitted from January 2000 to December 2004 did not adopt the early goal-directed fluid resuscitation strategies，therefore，being allocated into standard fluid therapy group （n=34）； patients admitted from January 2005 to November 2011 adopted the early goal-directed fluid resuscitation strategies and who were allocated into early goal-directed fluid therapy group （n=63）. With the exception of the fluid therapy strategies，the two group patients received standard treatment for SAP. The acute physiology and chronic health evaluation Ⅱ score （APACHEⅡ） and multiple organ dysfunction score （Marshall）， rate of multiple organ dysfunction syndrome （MODS） within the first week after admission，pancreatic infection rate，and in-hospital mortality were compared between the two groups. Results Compared with the standard fluid therapy group on day 3 after admission，APACHEⅡ score and Marshall score decreased significantly in the early goal-directed fluid therapy group （APACHEⅡ score：7.38±4.01 versus 11.35±4.27， P=0.011；Marshall score：4.13±2.06 versus 6.82±3.15， P=0.016）. In addition，patients in the early goal-directed fluid therapy group experienced a trend toward lower rates of MODS with the first week after admission，pancreatic infection，and in-hospital mortality （rate of MODS：46.0% versus 61.8%，P=0.139；rate of pancreatic infection：31.7% versus 44.1%， P=0.226；in-hospital mortality：15.8% versus 23.5%，P=0.355） that did not reach statistical significance. Conclusion Although early goal-directed fluid therapy for SAP in acute response stage may have ameliorated the patient’s condition and improved outcome to a certain degree，carefully designed human clinical trials should be performed in a randomized controlled manner to assess the role of such fluid resuscitation in SAP.
Cardiogenic shock (CS) describes a physiological state of end-organ hypoperfusion characterized by reduced cardiac output in the presence of adequate intravascular volume. Mortality still remains exceptionally high. Veno-arterial extracorporeal membrane oxygenation (VA ECMO) has become the preferred device for short-term hemodynamic support in patients with CS. ECMO provides the highest cardiac output, complete cardiopulmonary support. In addition, the device has portable characteristics, more familiar to medical personnel. VA ECMO provides cardiopulmonary support for patients in profound CS as a bridge to myocardial recovery. This review provides an overview of VA ECMO in salvage of CS, emphasizing the indications, management and further direction.
The American Heart Association (AHA) released the 2017 American Heart Association Focused Update on Adult Basic Life Support and Cardiopulmonary Resuscitation Quality (2017 AHA guidelines update) in November 2017. The 2017 AHA guidelines update was updated according to the rules named " the update of the guideline is no longer released every five years, but whenever new evidence is available” in the 2015 American Heart Association Guidelines Update for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care. The updated content in this guideline included five parts: dispatch-assisted cardiopulmonary resuscitation (CPR), bystander CPR, emergency medical services - delivered CRP, CRP for cardiac arrest, and chest compression - to - ventilation ratio. This review will interpret the 2017 AHA guidelines update in detail.