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Objective:To observe the effect of team resuscitation with Pit-Crew cardiopulmonary resuscitation (CPR) mode on improving the quality of chest compression.Methods:A control method was conducted in this study. Sixty-four medical staffs in ICU and Emergency departments were divided into the role division group and non-role division group according to the ratio of doctors to nurses, with 8 teams in each group and 4 staffs in each team. A team leader was appointed in each team of the role division group to organize and coordinate the whole CPR process, and the non-role division group was not appointed. Each team performed chest compression for 8 min according to the recommendations of the 2020 AHA CPR Guideline under the monitoring of the CPR quality tracking system using a resuscitation manikin. CPR time, chest compression fraction (CCF), times of pressing interruption, times of pressing exceeding standard interruption (>10 s), pressing frequency, chest full recoil rate and other parameters were observed and recorded. The computer system recorded the above parameters, Student's t test and Mann-Whitney U test were used to compare the differences of indexes between the two groups. Results:After the training, the role division group achieved higher CCF [(69.13±1.55)% vs. (59.13 ± 6.08)%, P<0.05], and the total time was significantly shorter and times of overshoot interruptions was significantly less in the role division group compared with the non-role division group [(79.88±28.76) s vs. (135.25±32.99) s; 4 (3, 5) times vs. 2 (1, 2) times respectively; P<0.01]. There were no statistical differences in the total time of CPR and interruption numbers ( P>0.05). In addition, there were also no statistically significant differences in the pressing total numbers, correct times, pressing frequency, pressing depth, and the full rebound times of compression, as well as the substandard indicators of compression such as pressing too fast, too slow, too deep and insufficient rebound times of compression (all P>0.05). Conclusions:Pit-Crew CPR mode with designated team leader contributes to the implementation of high quality CPR, and the monitoring of CPR quality parameters and the applying of real-time feedback system can effectively improve the quality of chest compression.
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Objective:To explored the progress of intensive care unit (ICU) delirium between 2010 and 2020 based on knowledge visualization analysis.Methods:The literatures related to ICU delirium included in Web of Sciences (WOS) and China National Knowledge Infrastructure (CNKI) databases from 2010 to 2020 were collected. A bibliometric analysis was performed. The growth trend was showed by Excel 2019 software. The information about country, institution and author were extracted by VOSviewer 1.6.15 for generating cooperative network, to find the main research power and each cooperative relation. At the same time, Citespace 5.0.R1 was used to analyze those high frequency keywords and bursting keywords and build the map of co-citation reference, in order to explore the evolution of research in the field of ICU delirium and the hotspots about this field in recent 10 years.Results:A total of 1 102 Chinese journal articles and 2 422 English "Articles" or "Reviews" from 2010 to 2020 were collected preliminarily, and the number of published literatures increased steadily. In the respect of quality, the impact factors of most articles were concentrated between 2 and 3, and the literatures with impact factor over 5 accounted for 27.9% (337/1 209). According to the knowledge visualization analysis, the United States published most of the related articles (total 1 152) in this field, while the England and Canada ranked second and third respectively, totaling 220 and 204. In terms of the distribution of research institutions, the Vanderbilt University School of Medicine was not only far ahead in the number of publication ( n = 149), but more importantly, top three high-impact authors located in this institution. The amount of domestic publications was lower than developed countries, however, the burst index, which reflected the sudden increase, ranked first (7.09), suggesting that the interest and investment of Chinese researchers was increasing recently. The most productive institution in China was Capital Medical University School of Nursing with totaling 23 articles. Wu Ying, who published most Chinese papers ( n = 14), belongs to this institution. However, it was a pity that there was no large scientific community be constructed in China, and the cooperation between institutions was deficient. By generating the co-occuring keyword mapping, the research hotpots mainly focused on the prevention, treatment and prevention of delirium in mechanically ventilated patients, the effect of dexmedetomidine and exploring the risk factor of ICU delirium. Finally, the results of co-citation reference analysis showed that Cluster 4 (risk assessment) was still in the process of development, in hence it was the frontier in this domain. Conclusions:There was a big gap between China and leading countries in the field of ICU delirium research. The main research power was located in the United States, and the trending of future studies mainly focus on delirium-related risk assessment.
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Out-of-hospital cardiac arrest (OHCA) is a global medical challenge. Early case recognition and initiating the chain of survival is associated with good prognosis of these patients. On the basis of former research, American Heart Association (AHA) published a policy statement related to telecommunicator cardiopulmonary resuscitation (T-CPR) in March 2020, and introduced its specific procedures, standards and precautions. To assist Chinese doctors in better understanding of the T-CPR, and give a reference for the emergency curing of OHCA, the guideline was translated and interpreted in this paper.
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Objective:To explore the progress of microcirculation research in shock and sepsis from 2000 to 2019 based on knowledge visualization analysis.Methods:The literatures related to microcirculation of shock and sepsis published in Web of Science and Wanfang databases were collected from 2000 to 2019. Then, data collected was sorted out and used to make bar charts and curves reflecting the growth trend of the literatures using Excel software. The information about country, institution and author were extracted by CiteSpace 5.0 R1 for generating co-occurring network, to find the main research power and each cooperative relation. This software was also used to analyze the related-keywords and cited reference, so that the map of co-citation reference was drawn subsequently to explore the frontiers and hot spots in this field.Results:There were a total of 2 000 Chinese "papers" or "dissertations", 1 823 English "articles" or "reviews", collected preliminarily. The Chinese literatures were only statistically described for the amounts, institutions and authors, however, all retrieved English literatures were enrolled in the visualization analysis eventually. From 2009 to 2019, the number of English literatures rose steadily; however, the number of Chinese literatures had been sliding since 2011. On terms of quality, the impact factors of most literatures were under 6, lacking high quality ones, and the number remained stable every year. According to the analysis of English literatures, the top three countries that published related papers around the world were Germany ( n = 430), the United States ( n = 401) and Netherlands ( n = 223). In the aspect of research institutions, the University of Amsterdam (Netherlands) ranked first in the Web of Science ( n = 113), while the institution in China with the most publications was the Southern Medical University ( n = 71). According to the analysis of co-occurring author network, there were three major globe scientific groups in which Can Ince, Daniel De Backer and Jean-Louis Vincent contributed most to this research field. The top three authors who published most Chinese papers were Niu Chunyu ( n = 20), Zhao Zigang ( n = 18) and Duan Meili ( n = 13). By generating the co-occurring keyword mapping, the research hot spots mainly focused on "blood flow", "nitric oxide", "hemorrhagic shock" and "perfusion". However, these burst keywords, including "cardiogenic shock", "acute kidney injury", "fluid resuscitation", "sublingual microcirculation", "mortality", "oxidative stress", and "critically ill patient", represented the frontiers in microcirculation research of shock and sepsis field. Finally, the results of co-citation reference analysis showed that "sublingual microcirculation" and "mottling score" were most active, indicating that the research of microcirculation monitoring technology could be considered as a hot spot and also the frontier in this field, which was consistent with the results of co-occurring keywords network. Conclusions:Knowledge visualization analysis can visually exhibit the hot spot and trend of microcirculation research in shock and sepsis. The power was mainly focused on a few developed countries in Europe, and the trend was more inclined to the related microcirculation monitoring technology.
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The European Society of Intensive Care Medicine (ESICM) issued the second consensus on the assessment of sublingual microcirculation in critically ill patients. This paper interprets the consensus for clinicians about: what is microcirculation, how to observe microcirculation, and the details of microcirculation images collection and parameters analysis. Besides, this paper illustrates the relationship between microcirculation alternation and shock, it also evaluates the present situation and future development of microcirculation monitoring.
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Objective To investigate the protective function of endovascular cooling method on post-resuscitation syndrome (PRS) in porcine cardiac arrest (CA) model and its mechanism.Methods Ventricular fibrillation (VF) was electrically induced and untreated for 8 minutes in 15 healthy male porcines, cardiopulmonary resuscitation (CPR) was then initiated. All successful recovery animals were randomly divided into two groups by random number table. In normal temperature group, the core temperature was maintained at (38.0±0.5) ℃ for 12 hours. In mild hypothermia group, the mild hypothermia treatment was initiated at 5 minutes after successful resuscitation, the treatment of rapid endovascular cooling was performed to reach the target cooling temperature of (33.0±1.0) ℃, and then maintained until 6 hours after resuscitation. Rewarming was implemented at the rate of 0.7 ℃/h until the body temperature reached (38.0±0.5) ℃. Hemodynamic parameters including heart rate (HR), mean arterial blood pressure (MAP), cardiac output (CO) were continually monitored. Right femoral vein blood was collected before VF and 1, 2, 4, 6, 12 and 24 hours after resuscitation, respectively, and the serum concentrations of E-selectin, soluble thrombomodulin (sTM), and interleukin-1β(IL-1β) were determined with enzyme linked immunosorbent assay (ELISA). The survival of porcines at 24 hours after resuscitation was observed, and the neurological deficit score (NDS) was calculated for the surviving porcines. All animals were sacrificed, and brain, heart and lung tissues were collected, after hematoxylin and eosin (HE) staining, the histopathology changes were evaluated under a light microscopy.Results After 8-minute VF, 14 porcines were resuscitated successfully, 7 porcines in normal temperature group and 7 in mild hypothermia group respectively, with the resuscitation success rate of 93.3％. There was no significant difference in body weigh, core temperature, hemodynamics, or blood lactate as well as duration of CPR and the number of defibrillations between the two groups. The core temperature of normal temperature group was maintained at (38.0±0.5) ℃, while in mild hypothermia group, the hypothermia was reduced to the hypothermia range (33.0±1.0) ℃until 6 hours, then rewarmed to normothermia gradually [(38.0±0.5) ℃]. Compared with those before VF, HR was significantly increased after resuscitation in both groups, and MAP and CO were decreased, then they tended to normal. There was no significant difference in hemodynamic parameter at all time points between the two groups. Compared with those before VF, the levels of E-selectin and sTM in serum of the two groups were increased significantly at 1 hour after resuscitation, and they were decreased gradually after reaching the peak at 6 hours, and IL-1β was increased continuously with time. There was no significant difference in E-selectin (μg/L:1.34±0.52 vs. 1.60±0.61), sTM (μg/L: 19.13±0.34 vs. 19.24±0.73), or IL-1β (ng/L: 25.73±0.87 vs. 25.32±0.25) before VF between normal temperature group and mild hypothermia group (allP> 0.05). The levels of E-selection, sTM and IL-1β in mild hypothermia group were significantly lower than those in normal temperature group from 2 hours after resuscitation [E-selection (μg/L): 11.15±2.73 vs. 16.04±3.23, sTM (μg/L): 49.67±3.32 vs. 62.22±1.85, IL-1β (ng/L): 140.51±6.66 vs. 176.29±18.51, allP< 0.05], and E-selection decreased to the baseline level at 12 hours (μg/L: 1.17±0.65 vs. 1.60±0.61,P > 0.05). The 24-hour survival rates of two groups were both 100％. The NDS score of mild hypothermia group was obviously lower than that of normal temperature group (150.0±6.6 vs. 326.4±12.3,P < 0.05). In normal temperature group, neuronal cell necrosis was observed in the cerebral cortex at 24 hours after resuscitation, and nucleus was deeply stained. The myocardial necrosis and alveolar collapse was found. Meanwhile the infiltration of inflammatory cell could be found in the myocardium and alveolar. The brain, lung and myocardium injury were significantly milder in mild hypothermia group as compared with those in normal temperature group.Conclusions The intravascular cooling therapy was a safe and effective method for inducing mild hypothermia after resuscitation. This cooling effect was fast and reliable, and the rewarming speed was controllable and stable. The protective mechanism of mild hypothermia on PRS may be related to inhibiting systemic inflammatory response and reducing vascular endothelial cell injury.
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Objective To observe the effect of air mattress bed on the quality of chest compression during cardiopulmonary resuscitation (CPR). Methods This was a self-controlled study and included twenty formally CPR-trained doctors. According to the 2015 American Heart Association Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care, chest compression was randomly tested on a manikin for two minutes in A, B, C group. Group A was tested in ordinary bed, group B was compress in air mattress and hard backboard, and group C was tested in air mattress bed. There was a ten minutes rest between each compression. All compression data, including compression rate, depth, incomplete recoil and shallow number, were collected via real-time feedback device. Statistical analysis was performed using SPSS 22.0. Multiple groups were compared with One-way ANOVA and within groups were compared with t test. The enumeration data was analyzed by chi-square test. Results There was no statistically significant difference between groups in mean chest compression rates (107.9±5.1 vs. 107.7±4.56 vs. 109.7±4.86, P=0.6). Mean compression depth was significantly better in group A and B than in group C [(53.45±2.04) mm and (52.65±2.13) mm vs. (48.45±1.36) mm, all P<0.05)]. The number of shallow compression in group C was significantly higher than those in group A and B [(97.3±23.4) vs. (23.6±19.3) and (35.3±33.9), all P<0.05)]. The retention rates in group A was better than those in group B and C [(58.43±4.17％) vs. (62.51±4.37)％ and (62.63±4.22)％, all P<0.05]. The compression depth of group C in the second minute was significantly less than that in the first minute (46.45±1.43 mm vs. 50.05±1.64 mm, P<0.05), and the number of shallow compression was more than the first minute (62.1±16.4 vs. 35.3±8.5, P<0.05). Significant difference in accuracy was observed among the three groups (33.64％ vs. 28.66％ vs. 19.24％, P<0.05). Conclusions The use of air mattress bed in CPR has a significant impact on the quality of manual chest compression. Eliminating the elasticity of air mattress bed would effectively improve the quality of chest compressions.