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Performing chest compressions during the initial phase of out-of-hospital cardiac arrest: continuous vs. alternating (CALM) – a study protocol for prospective, randomised, monocentric, non-blinded, mannequin study with German emergency medical service personnel 院外心脏骤停初始阶段进行胸外按压:连续vs交替(CALM)——一项前瞻性、随机、单中心、非盲、德国急救医疗服务人员的人体模型研究方案
IF 2.4 Q3 CRITICAL CARE MEDICINE Pub Date : 2026-03-01 Epub Date: 2026-01-06 DOI: 10.1016/j.resplu.2026.101220
Hans Thomas Hölzer, Nikolai Kaltschmidt, Levi Kohal, Johann Bechtold, Lisa Kaltschmidt, Marita Klein, Stefan Mohr, Christopher Neuhaus, Markus A. Weigand, Frank Weilbacher, Erik Popp, Stephan Katzenschlager

Introduction

Effective chest compressions are a core element of cardiopulmonary resuscitation (CPR). Current guidelines recommend exchanging the person performing chest compressions every two minutes to ensure high-quality chest compressions. However, this can lead to several task interruptions, which could result in a prolonged delay until other relevant tasks, such as securing the airway or administering adrenaline, are completed. Some studies have shown that a rescuer can perform sufficient CPR continuously for more than five minutes. Therefore, this study will investigate whether chest compressions without staff changes in the initial phase of CPR result in fewer task interruptions and an earlier completion of relevant tasks.

Methods and analysis

To investigate this, a prospective, randomised, monocentric, non-blinded, mannequin study will be conducted. The 32 teams will perform CPR in two simulated settings. Each team consists of four members, according to the German emergency service standard. Before entering the scenario, they will be randomised to either CPR with or without staff changes or either a shockable or non-shockable rhythm. The scenario ends with the fourth rhythm analysis. After a 20-min break, they will enter the second scenario. Teams will be informed whether they should perform continuous or alternating CPR but will not know which rhythm they have been assigned to. The primary outcome will be the time it takes to complete all relevant tasks during the initial CPR phase. Secondary outcomes include chest compression quality, task load, and number of interrupted tasks.

Ethics and dissemination

The protocol was approved by the ethics committee of the University of Heidelberg (S-252/2025, June 04, 2025). It is registered with the German Clinical Trials Register (DRKS00037157, June 10, 2025). Participation will be voluntary and based on informed consent. Data will be recorded only in a pseudonymised form. After completion, data will be kept on file for 10 years. The findings will be disseminated in a peer-reviewed academic journal. De-identified data from the case report form will be made publicly available within the first publication. The study will be conducted following the Declaration of Helsinki and relevant laws.
有效的胸部按压是心肺复苏(CPR)的核心要素。目前的指南建议每两分钟更换进行胸外按压的人员,以确保高质量的胸外按压。然而,这可能会导致几个任务中断,这可能会导致其他相关任务(如保护气道或管理肾上腺素)完成之前的长时间延迟。一些研究表明,一个救援者可以连续进行足够的心肺复苏术超过五分钟。因此,本研究将探讨在CPR初始阶段不改变工作人员的胸外按压是否会导致更少的任务中断和更早完成相关任务。方法和分析为了研究这一点,将进行一项前瞻性、随机、单中心、非盲法的人体模型研究。32支队伍将在两个模拟环境中进行心肺复苏术。按照德国应急服务标准,每个小组由四名成员组成。在进入场景之前,他们将被随机分配到有或没有人员更换的心肺复苏术中,或者是一个可休克或非休克的节奏。场景以第四个节奏分析结束。休息20分钟后,他们将进入第二个场景。各小组将被告知应该进行连续CPR还是交替CPR,但不知道他们被分配到哪个节律。主要结果将是在CPR初始阶段完成所有相关任务所需的时间。次要结局包括胸按压质量、任务负荷和中断任务数量。伦理与传播该方案经海德堡大学伦理委员会批准(S-252/2025, 2025年6月4日)。它已在德国临床试验登记处注册(DRKS00037157, 2025年6月10日)。参与将是自愿的,并基于知情同意。数据将以假名形式记录。完成后,数据将保存10年。研究结果将在同行评议的学术期刊上发表。病例报告表中的去识别数据将在首次出版物中公开提供。这项研究将根据《赫尔辛基宣言》和相关法律进行。
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引用次数: 0
Tonicity and colloid osmotic pressure drive microvascular recovery from low volume hypotensive resuscitation from hemorrhagic shock 补液性和胶体渗透压驱动失血性休克低容量低血压复苏微血管恢复
IF 2.4 Q3 CRITICAL CARE MEDICINE Pub Date : 2026-03-01 Epub Date: 2026-01-06 DOI: 10.1016/j.resplu.2026.101216
Carlos Munoz, Daniela Lucas, Krianthan Govender, Jacinda Martinez, Cynthia Muller, Zhixuan Song, Destiny Okechukwu-Nwabueze, Pedro Cabrales
Hypertonic saline solution containing 7.5% sodium chloride provides rapid intravascular volume expansion during severe hypovolemic shock, reducing the total fluid required to restore perfusion. Unlike traditional large-volume crystalloid resuscitation, which dilutes circulating blood components, hypertonic saline mobilizes intracellular and interstitial fluids into the vascular space, improving perfusion with minimal infusion volume. This strategy is particularly valuable in military and emergency settings where rapid stabilization and limited fluid availability are critical.
In this study, we integrated ex vivo rheological analyses and in vivo microvascular measurements to elucidate the mechanisms underlying low-volume resuscitation with hypertonic saline. In a rheological perspective, using controlled shear flow conditions ranging from 1 to 1,000 s−1, oscillatory amplitude sweeps (0.002–2.0 Pa at 0.5 Hz), and low-shear aggregation assays, we characterized the interaction of hypertonic saline with common resuscitation fluids, Lactated Ringer’s and 5% human serum albumin. Following ex vivo investigation, severe hemorrhagic shock was induced in Golden Syrian hamsters, instrumented with dorsal window chamber to quantify the microhemodynamics, by controlled withdrawal of 50% blood volume, followed by 30 min of hypovolemic shock. At the conclusion of the hypovolemia period resuscitation consisted of an initial infusion of hypertonic saline equal to 3.5% of blood volume, followed by either Lactated Ringer’s solution or 5% human serum albumin at 10% of animal’s blood volume. Microhemodynamics were assessed over 60 min following resuscitation.
Resuscitation with hypertonic saline followed by human serum albumin produced the most favorable microcirculatory outcomes, enhancing arteriolar blood flow and functional capillary density compared to Lactated Ringer’s solution. This combination increased reversible red blood cell aggregation and blood rheological changes, which may promote plasma skimming in small arterioles and improved red cell flux in the microcirculation. Although systemic recovery of mean arterial pressure and heart rate was incomplete, blood gas parameters significantly improved, indicating the benefits of effective microvascular reperfusion from severe hypovolemic conditions.
含7.5%氯化钠的高渗盐水溶液在严重低血容量性休克时可迅速扩大血管内容量,减少恢复灌注所需的总液体。与传统的大容量晶体液体复苏不同,高渗盐水将细胞内和间质液动员到血管间隙,以最小的输注量改善灌注。这一战略在军事和紧急情况下特别有价值,因为快速稳定和有限的流体供应至关重要。在这项研究中,我们结合了离体流变学分析和体内微血管测量来阐明高渗盐水低容量复苏的机制。从流变学的角度来看,利用1 - 1000 s−1的控制剪切流条件、振荡振幅扫描(0.002-2.0 Pa, 0.5 Hz)和低剪切聚集试验,我们表征了高渗盐水与常见复苏液、乳酸林格氏液和5%人血清白蛋白的相互作用。在离体研究的基础上,对金叙利亚仓鼠进行重度失血性休克诱导,采用背窗室定量测量微量血流动力学,控制抽取50%的血容量,然后进行30min的低血容量性休克。在低血容量期结束时,复苏包括初始输注相当于血容量3.5%的高渗生理盐水,随后以动物血容量10%的乳酸林格氏液或5%的人血清白蛋白。复苏后60分钟进行微血流动力学评估。与乳酸林格氏液相比,高渗生理盐水复苏后加人血清白蛋白可产生最有利的微循环结果,增强小动脉血流量和功能性毛细血管密度。这种组合增加了可逆的红细胞聚集和血液流变学变化,这可能促进小动脉的血浆撇脂和改善微循环中的红细胞通量。虽然平均动脉压和心率的全身恢复不完全,但血气参数明显改善,表明严重低血容量条件下有效微血管再灌注的益处。
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引用次数: 0
Superior machine learning model for post-cardiac arrest mortality prediction: a MIMIC-IV cohort study 心脏骤停后死亡率预测的卓越机器学习模型:一项MIMIC-IV队列研究
IF 2.4 Q3 CRITICAL CARE MEDICINE Pub Date : 2026-03-01 Epub Date: 2026-01-12 DOI: 10.1016/j.resplu.2026.101223
Danxia Chen , Guode Li , Qinqin Shu , Junlin Huang , Weifeng Yuan , Yan Li

Background

Post-cardiac arrest syndrome carries substantial mortality despite advances in resuscitation. We developed a machine learning model to predict 28-day mortality using comprehensive clinical data.

Methods

We analyzed data from 1122 cardiac arrest patients in the MIMIC-IV database. After applying exclusion criteria, 853 patients with complete 28-day outcome data were included. We extracted 99 variables across six domains and compared five machine learning algorithms. Lactate clearance was calculated as: (Day 1 lactate − Day 3 lactate)/Day 1 lactate × 100%. Model performance was evaluated using AUC-ROC, calibration metrics, and SHAP analysis.

Results

Among 853 patients (mean age 64.7 ± 16.3 years, 63.5% male), 327 (38.3%) died within 28 days. The XGBoost model achieved an AUC-ROC of 0.89 (95% CI: 0.86–0.92), outperforming APACHE III (AUC: 0.73). Lactate clearance rate emerged as the primary predictor (SHAP value: 0.24), followed by GCS score (0.21), SOFA score (0.18), age (0.16), and treatment intensity (0.14). Poor lactate clearance (0–25%) was associated with 67% mortality compared to 39% in moderate clearance (25–50%).

Conclusions

Our machine learning model demonstrated superior accuracy for 28-day mortality prediction in post-cardiac arrest patients. Dynamic lactate clearance and neurological assessment provide actionable clinical insights for risk stratification.
背景:尽管复苏技术有所进步,但心脏骤停综合征的死亡率仍然很高。我们开发了一个机器学习模型,利用综合临床数据预测28天死亡率。方法分析MIMIC-IV数据库中1122例心脏骤停患者的数据。应用排除标准后,纳入853例具有完整28天结局数据的患者。我们从六个领域中提取了99个变量,并比较了五种机器学习算法。乳酸清除率计算为:(Day 1 Lactate−Day 3 Lactate)/Day 1 Lactate × 100%。采用AUC-ROC、校准指标和SHAP分析评估模型性能。结果853例患者(平均年龄64.7±16.3岁,男性63.5%)中,327例(38.3%)在28天内死亡。XGBoost模型的AUC- roc为0.89 (95% CI: 0.86-0.92),优于APACHE III (AUC: 0.73)。乳酸清除率是主要预测因子(SHAP值:0.24),其次是GCS评分(0.21)、SOFA评分(0.18)、年龄(0.16)和治疗强度(0.14)。低乳酸清除率(0-25%)与67%的死亡率相关,而中等清除率(25-50%)与39%的死亡率相关。结论我们的机器学习模型对心脏骤停后患者28天死亡率预测具有较高的准确性。动态乳酸清除率和神经学评估为风险分层提供了可操作的临床见解。
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引用次数: 0
Out-of-hospital cardiac arrest detection by a wearable: the first real-life case 院外心脏骤停检测可穿戴设备:第一个真实案例
IF 2.4 Q3 CRITICAL CARE MEDICINE Pub Date : 2026-03-01 Epub Date: 2026-01-29 DOI: 10.1016/j.resplu.2026.101245
Roos Edgar , Catharina E. Jansen , Lente R. Pol , Ron Pisters , Niels van Royen , Judith L. Bonnes

Introduction

Automated cardiac arrest detection and alerting using wearable technology is an emerging innovation in resuscitation science. The DETECT program aims to develop a wristband that integrates photoplethysmography and accelerometry to identify out-of-hospital cardiac arrest events and alert the emergency medical services. We report the first case in which the algorithm successfully detected a cardiac arrest that occurred during daily life in an implantable cardioverter-defibrillator (ICD) patient.

Case description

A 64-year old male with a secondary prevention ICD participated in the DETECT-3 study. As part of the study, he was wearing the CardioWatch wristband during daily life for a two-month period. While cycling, the patient experienced a ventricular fibrillation cardiac arrest that was successfully terminated by the ICD. The cardiac arrest detection algorithm of the CardioWatch correctly recognized the cardiac arrest event and subsequent collapse based on photoplethysmography and accelerometry data during post-processing. The patient was admitted for rhythm observation and made a good recovery.

Discussion

This first real-life case shows feasibility of cardiac arrest detection using wrist-derived photoplethysmography and accelerometry. Further studies are warranted to validate the algorithm in additional cardiac arrest cases, and to minimize false positive alerts during daily-life use. Once implemented, automated cardiac arrest detection and alerting has the potential to shorten treatment delays and improve survival.
使用可穿戴技术的自动心脏骤停检测和警报是复苏科学的一项新兴创新。DETECT项目旨在开发一种腕带,该腕带集成了光体积脉搏图和加速度计,以识别院外心脏骤停事件并向紧急医疗服务发出警报。我们报告的第一个案例中,该算法成功地检测到心脏骤停,发生在日常生活中的植入式心律转复除颤器(ICD)患者。病例描述:一名64岁男性二级预防ICD患者参加了DETECT-3研究。作为研究的一部分,他在两个月的日常生活中戴着CardioWatch腕带。在骑车时,患者经历了室性颤动心脏骤停,并通过ICD成功终止。CardioWatch的心脏骤停检测算法在后处理过程中根据光容积脉搏波和加速度测量数据正确识别心脏骤停事件和随后的崩溃。患者入院进行心律观察,恢复良好。这是第一个现实生活中的案例,表明了使用腕部光电容积脉搏波和加速度计检测心脏骤停的可行性。进一步的研究需要在更多的心脏骤停病例中验证该算法,并在日常使用中最大限度地减少误报警报。一旦实施,自动心脏骤停检测和警报有可能缩短治疗延误并提高生存率。
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引用次数: 0
Dispatcher referral of bystanders to retrieve drone-delivered automated external defibrillators in cases of suspected out-of-hospital cardiac arrest 在怀疑院外心脏骤停的情况下,调度员推荐旁观者取回无人机运送的自动体外除颤器。
IF 2.4 Q3 CRITICAL CARE MEDICINE Pub Date : 2026-03-01 Epub Date: 2026-02-16 DOI: 10.1016/j.resplu.2026.101262
Sofia Schierbeck , Anette Nord , Leif Svensson , Magnus Kristiansson , Mattias Ringh , Per Nordberg , Jacob Hollenberg , Gabriel Riva , Martin Jonsson , Andreas Claesson

Background

Drone dispatch in out-of-hospital cardiac arrest (OHCA) may shorten time to AED-attachment, however little is known about barriers for dispatchers to refer bystanders to retrieve and attach AEDs after delivery. This study aims to evaluate characteristics of drone delivered AEDs (D-AEDs) before and after implementing an educational bundle.

Methods

This retrospective before–after observational study included all cases of D-AEDs arriving before EMS in suspected OHCA in Sweden (2020–2023). A supportive educational bundle was implemented at the dispatch centre in June 2022. Dispatcher–caller interactions were evaluated through audits of 112 voice logs using a modified CARES protocol.

Results

Out of 123 deliveries of D-AEDs to suspected OHCAs before EMS arrival, 62 cases (50%) received bystander CPR. Dispatcher referral of bystanders to retrieve the D-AED occurred in totally 30/62 (48%) cases with an increase from 7/22 (32%) before, to 23/40 (58%) after bundle implementation. D-AED attachment occurred in 26/62 (42%), increase from 6/22 (27%) to 20/40 (50%). Cases with referral to a D-AED more often involved multiple bystanders onsite, 77% vs 23% in single bystander cases (p = 0.005). Median time difference between D-AED and EMS arrival was 03:14 (IQR 01:46–05:31) in the referral group and 01:49 (IQR 01:10–05:03) with non-referral (p = 0.8).

Conclusion

Drones can deliver AEDs at an early stage in selected suspected OHCA cases. Implementation of an educational bundle at the dispatch centre was associated with increased dispatcher referral and bystander attachment of D-AEDs. D-AED referral was influenced by the number of bystanders onsite. When dispatcher referral occurred, D-AEDs were used in a majority of cases.
背景:院外心脏骤停(OHCA)的无人机调度可以缩短到aed连接的时间,然而,很少有人知道调度人员在分娩后推荐旁观者取回和连接aed的障碍。本研究旨在评估无人机交付的aed (d - aed)在实施教育捆绑包之前和之后的特性。方法:这项回顾性的前后观察性研究纳入了2020-2023年瑞典所有在EMS之前到达的疑似OHCA的d - aed病例。2022年6月,调度中心实施了一套支持性教育方案。通过使用修改后的CARES协议对112个语音日志进行审计,评估了调度员与呼叫者之间的交互。结果:123例在EMS到达前交付d - aed的疑似ohca患者中,62例(50%)接受了旁观者CPR。调度员推荐旁观者取取D-AED的病例总数为30/62例(48%),从实施捆绑治疗前的7/22例(32%)增加到实施捆绑治疗后的23/40例(58%)。D-AED连接发生率为26/62(42%),由6/22(27%)上升至20/40(50%)。转介到D-AED的病例通常涉及多名现场旁观者,77%对23%的单一旁观者(p = 0.005)。转诊组D-AED与EMS到达的中位时差为03:14 (IQR 01:46-05:31),非转诊组为01:49 (IQR 01:10-05:03) (p = 0.8)。结论:无人机可在选定的疑似OHCA病例早期送出aed。在调度中心实施教育捆绑与调度员转诊和旁观者对d - aed的依恋增加有关。D-AED转诊受现场旁观者数量的影响。当调度员转诊时,大多数情况下使用d - aed。
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引用次数: 0
A novel algorithm to determine ventilation parameters during cardiopulmonary resuscitation using pneumotachography waveform data 一种利用超声心动图波形数据确定心肺复苏通气参数的新算法。
IF 2.4 Q3 CRITICAL CARE MEDICINE Pub Date : 2026-03-01 Epub Date: 2026-01-21 DOI: 10.1016/j.resplu.2026.101238
Johan Mälberg , Jeroen A. van Eijk , Lotte C. Doeleman , Patrick Schober , Hans van Schuppen , David Smekal , Sten Rubertsson , Douglas Spangler

Background

A major barrier to the analysis of ventilation waveform data collected during CPR is the presence of artefacts caused by chest compressions. This study describes the development and evaluation of an algorithm to extract parameters regarding ventilation volume, pressure, and frequency from pneumotachography waveform data collected during ongoing simulated CPR.

Method

Ventilation waveform data was collected from a pneumotachograph connected to the respiratory circuit of a ventilator and a test lung. Both regular ventilation and ventilation during simulated CPR were used to develop the algorithm. A grid search was employed to optimize the algorithm parameters compared to the ventilator settings. The parameters were then manually tuned using clinical data from ventilation during CPR. The performance of the algorithm was described in terms of the median error vs. the known ventilator settings in the simulated data.

Results

Compared to the ventilator settings, the largest systematic errors of the algorithm was an overestimation of peak pressures during asynchronous CPR (median error of 3 (IQR 0.3–5.8) cmH2O), and an underestimation of inspiratory volumes during synchronous CPR (median error 46 (IQR −76 to 10) ml).

Conclusion

In an experimental setting, the developed algorithm provides a novel solution to measure ventilation parameters during ongoing chest compressions. The algorithm is freely available under an open-source licence for use and further development. Further studies will be needed to validate the algorithm.
背景:对心肺复苏期间收集的通气波形数据进行分析的一个主要障碍是胸部按压引起的伪影的存在。本研究描述了一种算法的开发和评估,该算法从正在进行的模拟心肺复苏过程中收集的气相造影术波形数据中提取有关通气量、压力和频率的参数。方法:通过连接呼吸机呼吸回路和测试肺的气记录仪收集通气波形数据。在模拟心肺复苏术过程中使用常规通气和通气来开发算法。与呼吸机设置相比,采用网格搜索来优化算法参数。然后使用心肺复苏术期间通气的临床数据手动调整参数。该算法的性能是根据中值误差与模拟数据中的已知呼吸机设置来描述的。结果:与呼吸机设置相比,该算法的最大系统误差是高估非同步心肺复苏期间的峰值压力(中位数误差为3 (IQR - 0.3-5.8) cmH2O),低估同步心肺复苏期间的吸气量(中位数误差为46 (IQR -76至10)ml)。结论:在实验环境中,开发的算法为持续胸外按压期间测量通气参数提供了一种新颖的解决方案。该算法在开源许可下可以免费使用和进一步开发。需要进一步的研究来验证该算法。
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引用次数: 0
Acidemia predicts mortality independently of lactate levels in patients after cardiac arrest 酸血症预测心脏骤停后患者的死亡率与乳酸水平无关
IF 2.4 Q3 CRITICAL CARE MEDICINE Pub Date : 2026-03-01 Epub Date: 2026-01-16 DOI: 10.1016/j.resplu.2026.101234
Dragos A. Duse , Andreea I. Ganea , Patrick Horn , Matthias Ortkemper , Jafer Haschemi , Philipp Deffke , Christian Jung , Malte Kelm , Ralf Erkens

Aim

We examined whether post-cardiac arrest acidemia is associated with 30-day mortality and neurological outcomes among hospital survivors, independent of lactate and partial arterial carbon dioxide pressure (paCO2) levels, in patients after cardiopulmonary resuscitation (CPR).

Methods

The predictive value of acidemia for in-hospital mortality was analyzed retrospectively in 742 non-traumatic cardiac arrest patients admitted to a German high-volume tertiary center using receiver operating characteristic (ROC) analysis. Patients were stratified using the ROC-derived (Youden-optimal) pH cut-off, and 30-day mortality was compared across strata. Cox regression assessed the association between severe acidemia (pH ≤ 7.2, binary) and mortality and examined its consistency across prespecified subgroups (age, sex, cardiac arrest type, lactate, and paCO2). Preliminary findings were externally validated in a database containing over 2000 patients from multiple intensive care units (eICU database).

Results

Admission pH levels predicted in-hospital mortality (area-under-curve 0.75, p < 0.0001). The ROC-derived Youden-optimal threshold was pH 7.207; for clinical interpretability, this value was rounded to pH 7.2 and used as the cut-off for severe acidemia. Patients with severe acidemia exhibited substantially higher in-hospital and 30-day mortality. Among hospital survivors, no statistically significant association between admission pH and neurological outcome was observed. In Cox models, pH ≤ 7.20 remained significantly associated with mortality independent of lactate, paCO2, arrest type, age, and sex. In the validation eICU cohort, pH ≤ 7.2 accurately stratified cardiac-arrest patients with a higher mortality risk. This association persisted in Cox regression analyses of subgroups stratified by lactate and paCO2 levels (all p < 0.0001), as proxies for systemic hypoperfusion and ventilation.

Conclusion

Post-cardiac-arrest acidemia is associated with higher mortality independently of lactate, ventilation, or CPR characteristics. Among hospital survivors, admission pH was not significantly associated with neurological outcome. These findings support pH as an early marker for mortality risk stratification after cardiac arrest, to be interpreted in the context of multimodal prognostication.
我们研究了在心肺复苏(CPR)后的患者中,心脏骤停后酸血症是否与30天死亡率和医院幸存者的神经系统预后相关,独立于乳酸和部分动脉二氧化碳压(paCO2)水平。方法采用受试者工作特征(ROC)分析回顾性分析德国某大容量三级中心742例非外伤性心脏骤停患者血酸血症对院内死亡率的预测价值。使用roc衍生(Youden-optimal) pH临界值对患者进行分层,并对各阶层的30天死亡率进行比较。Cox回归评估了严重酸血症(pH≤7.2,二元)与死亡率之间的关系,并检查了其在预先指定的亚组(年龄、性别、心脏骤停类型、乳酸和paCO2)中的一致性。初步发现在包含来自多个重症监护室的2000多名患者的数据库(eICU数据库)中进行了外部验证。结果入院pH值预测住院死亡率(曲线下面积0.75,p < 0.0001)。roc衍生的优登最佳阈值为pH 7.207;为了临床可解释性,该值被四舍五入到pH 7.2,并用作严重酸血症的临界值。严重酸血症患者表现出更高的住院死亡率和30天死亡率。在住院幸存者中,未观察到入院pH值与神经预后之间有统计学意义的关联。在Cox模型中,pH≤7.20与死亡率显著相关,与乳酸、paCO2、骤停类型、年龄和性别无关。在验证性eICU队列中,pH≤7.2准确分层心脏骤停患者具有较高的死亡风险。在以乳酸和paCO2水平分层的亚组(均p <; 0.0001)作为全体性灌注不足和通气的替代指标的Cox回归分析中,这种关联仍然存在。结论心脏骤停后酸血症与较高的死亡率相关,与乳酸、通气或心肺复苏术特征无关。在住院幸存者中,入院pH值与神经预后无显著相关性。这些发现支持pH值作为心脏骤停后死亡风险分层的早期标记,可以在多模式预测的背景下进行解释。
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引用次数: 0
Wolf Creek XVIII Part 3: Innovations in Defibrillation Science Wolf Creek XVIII第3部分:除颤科学的创新
IF 2.4 Q3 CRITICAL CARE MEDICINE Pub Date : 2026-03-01 Epub Date: 2026-01-18 DOI: 10.1016/j.resplu.2026.101229
Rudolph W. Koster , Peter J. Kudenchuk , Sheldon Cheskes , Giuseppe Ristagno , Gregory P. Walcott

Introduction

Effective defibrillation lies at the heart of successful resuscitation of ventricular fibrillation cardiac arrest. Can it be done better?

Methods

The 50th Anniversary Wolf Creek XVIII Conference was hosted by the Max Harry Weil Institute for Critical Care Research and Innovation in Ann Arbor, Michigan, USA on June 19–21, 2025. Since its inception in 1975, the Wolf Creek Conference has a well-established tradition of providing a unique forum for robust intellectual exchange between thought leaders and scientists from academia and industry focused on advancing the science and practice of cardiac arrest resuscitation.

Results

Innovations in Defibrillation Science was one of six focused panel topics that was presented and discussed by invited panelist and conference participants as recognized thought leaders in the field of cardiac arrest resuscitation, all of whom completed conflict of interest disclosures.
The presentations by invited panelist and discussion focused on four distinct defibrillation-related topics, each written as was presented by its contributing author, providing their individual perspectives. Where applicable, each discussion addressed the current state, potential future state, knowledge gaps, barriers to translation, and research priorities in defibrillation science. Topics included refining the definition of defibrillation and resuscitation success, describing defibrillation mechanisms, double sequential external defibrillation for refractory ventricular fibrillation, and use of quantitative waveform analysis to better direct resuscitation care.

Conclusions

Although much is known, much remains to be learned about defibrillation and its optimal application during resuscitation of cardiac arrest.
有效的除颤是室性颤动心脏骤停成功复苏的关键。还能做得更好吗?方法Wolf Creek XVIII会议于2025年6月19日至21日在美国密歇根州安娜堡市由Max Harry Weil重症监护研究与创新研究所主办。自1975年成立以来,沃尔夫克里克会议已经建立了一个良好的传统,为来自学术界和工业界的思想领袖和科学家之间提供了一个独特的论坛,以促进心脏骤停复苏的科学和实践。除颤科学的创新是由受邀的小组成员和会议参与者作为心脏骤停复苏领域公认的思想领袖提出和讨论的六个重点小组主题之一,所有人都完成了利益冲突披露。特邀小组成员的演讲和讨论集中在四个不同的除颤器相关主题上,每个主题都由其特约作者提出,并提供他们的个人观点。在适用的情况下,每次讨论都讨论了除颤科学的当前状态、潜在的未来状态、知识差距、翻译障碍和研究重点。主题包括细化除颤和复苏成功的定义,描述除颤机制,双顺序体外除颤治疗难治性心室颤动,以及使用定量波形分析来更好地指导复苏护理。结论虽然我们已经了解了很多,但关于除颤及其在心脏骤停复苏中的最佳应用仍有很多需要了解的。
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引用次数: 0
Changes in diagnostic and care trajectories following use of continuous EEG monitoring for neuroprognostication after out of hospital cardiac arrest – a before-and-after study 院外心脏骤停后使用连续脑电图监测进行神经预后后诊断和护理轨迹的变化——一项前后研究
IF 2.4 Q3 CRITICAL CARE MEDICINE Pub Date : 2026-03-01 Epub Date: 2026-02-12 DOI: 10.1016/j.resplu.2026.101268
Luuk Wieske , Jeroen Hoogland , Ineke van de Pol , Anna J. Court , Vera Lagerburg , Laurien L. Teunissen , Mirjam Datema , Jolande van Helden , Hazra S. Moeniralam , Lea M. Dijksman , Erik Scholten , Antje A. Seeber , Mariska M.G. Leeflang

Aim

Continuous electro-encephalography (cEEG) has been added to multimodal protocols to improve neurological prognostication in patients after cardiac arrest. Our aim was to investigate the impact of adding cEEG on diagnostic and care trajectories in clinical practice.

Methods

Before-and-after study of patients after out of hospital cardiac arrest admitted in 2013–2024 to the intensive care unit in the Netherlands. Data on diagnostic and care trajectories and costs associated with prognostication were compared between patients admitted from 2013 to 2019, when cEEG was not used to predict the neurological prognosis, and patients admitted from 2019 to 2024, when cEEG was used.

Results

581 patients were included; 355 when cEEG was not used for neuroprognostication and 226 when cEEG was used. cEEG patterns associated with a poor prognosis were found in 18% of patients; cEEG patterns associated with a good prognosis in 24%. When cEEG was used, the neurologic outcome (either good or poor) could be predicted in an additional 23% of patients (95% CI: 16–31%). ICU length of stay did not change when cEEG was used (adjusted estimate: 1% increase in days; 95% CI: −23% to 32%) nor did overall survival (adjusted hazard ratio: 0.93; 95% CI: 0.68–1.27). Overall costs did not differ (estimated difference €1040; 95% CI: −4672 to 7078).

Conclusion

Use of cEEG increased the number of patients in whom the neurological prognosis after out of hospital cardiac arrest could be predicted correctly. We did not observe changes in subsequent care trajectories although this may have been influenced by self-fulfilling prophecies and/or incorporation bias.
连续脑电图(cEEG)已被添加到多模态方案中,以改善心脏骤停后患者的神经预后。我们的目的是研究在临床实践中增加脑电图对诊断和护理轨迹的影响。方法对2013-2024年荷兰重症监护病房收治的院外心脏骤停患者进行前后对比研究。比较了2013年至2019年未使用cEEG预测神经系统预后的患者和2019年至2024年使用cEEG预测神经系统预后的患者的诊断和护理轨迹以及与预后相关的成本数据。结果共纳入581例患者;不使用脑电图进行神经预后时为355例,使用脑电图进行神经预后时为226例。在18%的患者中发现与预后不良相关的脑电图模式;24%的脑电图模式与良好预后相关。当使用脑电图时,另外23%的患者(95% CI: 16-31%)的神经系统预后(好或差)可以预测。使用cEEG时,ICU的住院时间没有变化(调整后的估计:增加1%的天数;95% CI: - 23%至32%),总生存率也没有变化(调整后的风险比:0.93;95% CI: 0.68-1.27)。总体成本没有差异(估计差异€1040;95% CI: - 4672至7078)。结论脑电图的应用增加了院外心脏骤停患者神经系统预后的准确预测。我们没有观察到后续护理轨迹的变化,尽管这可能受到自我实现预言和/或合并偏差的影响。
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引用次数: 0
Cost effectiveness of pre-hospital extracorporeal cardiopulmonary resuscitation for out-of-hospital cardiac arrest – An analysis of the PRECARE study 院前体外心肺复苏治疗院外心脏骤停的成本效益——PRECARE研究分析
IF 2.4 Q3 CRITICAL CARE MEDICINE Pub Date : 2026-03-01 Epub Date: 2026-01-22 DOI: 10.1016/j.resplu.2026.101242
Fredrick Zmudzki , Brian Burns , Natalie Kruit , Changle Song , Emily Moylan , Paul Forrest , Miles Greenberg , Thomas Evens , Anthony Keech , Mark Dennis

Background

While the use of pre-hospital extracorporeal cardiopulmonary resuscitation for refractory out of hospital cardiac arrest is increasing, there is little data on whether it is cost-effective. This study investigated its cost-effectiveness of based on our current study data.

Methods

Using data from the PRECARE trial, the New South Wales Ambulance Cardiac Arrest Registry (CAR) and in-hospital costings, we performed a cost effectiveness analysis of pre-hospital extracorporeal cardiopulmonary resuscitation (ECPR). A Markov model was used to integrate PRECARE service costs and patient outcomes, team time allocation to ECPR, patient volume, organ donation and alternate pre-hospital delivery strategies. Bridging formulae were used with ECPR survivor Cerebral Performance Category scores to estimate Quality Adjusted Life Years and Incremental Cost Effectiveness Ratios. Probabilistic sensitivity analysis was undertaken to assess the joint uncertainty in model parameters.

Results

Sixteen patients were analysed (mean age 52 ± 10 years). Five patients (31%) survived to hospital discharge; all with a cerebral performance category score of 1 or 2. Three (60%) of survivors returned to work during the study period. There was one organ donor. The total cost per patient was $94,460 (±$103,455), with a base-case incremental cost-effectiveness ratio of AUD 34,000 per quality adjusted life year (assuming 100 patients per year, and ECPR cases occupying 15% of the PH-ECPR team’s time). If the PRECARE team were exclusively dedicated to ECPR cases, the cost per quality adjusted life year would increase to $95,000.

Conclusion

PH-ECPR in Sydney is likely to be cost-effective, assuming a 15% allocation of prehospital team time to ECPR. Survival rate, organ donation and the team’s ability to perform other clinical tasks when not performing ECPR are key factors influencing cost effectiveness. A PH team exclusively dedicated to ECPR is much less cost-effective.
虽然院前体外心肺复苏治疗难治性院外心脏骤停的应用越来越多,但关于其是否具有成本效益的数据很少。本研究根据目前的研究数据对其成本效益进行了调查。方法利用PRECARE试验、新南威尔士州救护车心脏骤停登记(CAR)和住院成本的数据,我们对院前体外心肺复苏(ECPR)进行了成本效益分析。使用马尔可夫模型整合PRECARE服务成本和患者预后、团队时间分配到ECPR、患者数量、器官捐赠和备选院前分娩策略。桥接公式与ECPR幸存者脑功能分类评分一起用于估计质量调整生命年和增量成本-效果比。采用概率敏感性分析对模型参数的联合不确定性进行评估。结果共分析16例患者,平均年龄52±10岁。5例(31%)存活至出院;所有人的大脑功能分类得分都在1到2分之间。3名(60%)幸存者在研究期间重返工作岗位。只有一个器官捐献者。每位患者的总成本为94,460澳元(±103,455美元),每个质量调整生命年的基本病例增量成本-效果比为34,000澳元(假设每年有100名患者,ECPR病例占PH-ECPR团队时间的15%)。如果PRECARE小组专门处理ECPR病例,每个质量调整生命年的费用将增加到95,000美元。假设院前团队时间的15%分配给ECPR,悉尼的ph -ECPR可能具有成本效益。生存率、器官捐赠和团队在不执行ECPR时执行其他临床任务的能力是影响成本效益的关键因素。一个专门从事ECPR的PH团队成本效益要低得多。
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引用次数: 0
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Resuscitation plus
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