Patients with severe trauma require an extremely timely treatment and transfusion plays an irreplaceable role in the emergency treatment of such patients. An increasing number of evidence-based medicinal evidences and clinical practices suggest that patients with severe traumatic bleeding benefit from early transfusion of low-titer group O whole blood or hemostatic resuscitation with red blood cells, plasma and platelet of a balanced ratio. However, the current domestic mode of blood supply cannot fully meet the requirements of timely and effective blood transfusion for emergency treatment of patients with severe trauma in clinical practice. In order to solve the key problems in blood supply and blood transfusion strategies for emergency treatment of severe trauma, Branch of Clinical Transfusion Medicine of Chinese Medical Association, Group for Trauma Emergency Care and Multiple Injuries of Trauma Branch of Chinese Medical Association, Young Scholar Group of Disaster Medicine Branch of Chinese Medical Association organized domestic experts of blood transfusion medicine and trauma treatment to jointly formulate Chinese expert consensus on blood support mode and blood transfusion strategies for emergency treatment of severe trauma patients ( version 2024). Based on the evidence-based medical evidence and Delphi method of expert consultation and voting, 10 recommendations were put forward from two aspects of blood support mode and transfusion strategies, aiming to provide a reference for transfusion resuscitation in the emergency treatment of severe trauma and further improve the success rate of treatment of patients with severe trauma.

Sepsis is a life-threatening organ dysfunction caused by a dysregulated host response to infection, of which the pathogenesis is complex and the mortality rate is high. However, current basic research is facing the dilemma of high heterogeneity and difficult translation to clinical practice. In-depth basic research is one of the most important ways to break through the "bottleneck" of clinical diagnosis and treatment of sepsis. The purpose of this review is to analyze the current progress and challenges in the field of basic research on sepsis, and look forward to the potential research directions in the future. Cell function, energy metabolism, microbiota, epigenetics and recovery period of sepsis may be the research priorities.

Objective:To evaluate the effect of methane on acetaminophen-induced acute liver injury (ALI) in mice and the role of autophagy.Methods:Forty clean-grade SPF healthy adult male C57BL/6 mice, aged 8-10 weeks, weighing 20-25 g, were divided into 4 groups ( n=10 each) using a random number table method: control group (group C), group ALI, methane-rich saline group (group MS) and methane-rich saline plus 3-methyladenine (3-MA) group (group MS+ 3-MA). Acetaminophen 300 mg/kg was injected intraperitoneally to establish ALI model.Group MS was injected intraperitoneally with methane-rich saline 10 ml/kg immediately after establishing the model and at 12 h after establishing the model.Group MS+ 3-MA was injected intraperitoneally with methane-rich saline 10 ml/kg and autophagy inhibitor 3-MA 30 mg/kg immediately after establishing the model and was injected intraperitoneally with methane-rich saline 10 ml/kg at 12 h after establishing the model.The equal volume of sterile saline was given intraperitoneally at the same time points in C and ALI groups.At 24 h after establishment of the model, blood samples from the eyeball were taken for measuring concentrations of alanine transaminase (ALT) and aspartate transaminase (AST) in serum (using biochemistry analyzer) and the concentrations of tumor necrosis factor (TNF)-α and interleukin (IL)-6 in serum (using enzyme-linked immunosorbent assay). The animals were then sacrificed and liver tissues were removed for determination of microtubule-associated protein 1 light chain 3 (LC3) and p62 (by Western blot) and for the examination of the number of autophagosomes (under a transmission electron microscope). Results:Compared with group C, the concentrations of ALT, AST, TNF-α and IL-6 in serum were significantly increased, LC3Ⅱ/LC3Ⅰ ratio was increased, expression of p62 was up-regulated, and the number of autophagosomes was increased in liver tissues in ALI, MS and MS+ 3-MA groups ( P<0.05). Compared with group ALI, the concentrations of ALT, AST, TNF-α and IL-6 in serum were significantly decreased, LC3Ⅱ/LC3Ⅰ ratio was increased, expression of p62 was down-regulated, and the number of autophagosomes in liver tissues was increased in group MS, and AST concentration in serum was decreased and LC3Ⅱ/LC3Ⅰ ratio was increased in group MS+ 3-MA ( P<0.05). Compared with group MS, the concentrations of ALT, AST, TNF-α and IL-6 were significantly increased, the LC3 II/LC3 I ratio and the number of autophagosomes were decreased in lung tissues in group MS+ 3-MA ( P<0.05). Conclusion:The mechanism by which methane can reduce acetaminophen-induced ALI is related to enhancement of the level of autophagy in liver cells in mice.

Perioperative cardiac arrest is a significant cause of perioperative mortality in patients.The first clinical practice recommendation dedicated to the management of perioperative cardiac arrest was published in 2021 and contains 22 specific recommendations.This clinical practice recommendation includes indicators to monitor during treatment, the sequence of defibrillation and chest compressions, the use of epinephrine and antiarrhythmic drugs, treatment strategies for specific types of perioperative cardiac arrest, the use of adjunctive therapies such as ultrasound to assist in treatment, setting appropriate hemodynamic and respiratory parameters, and temperature management.This clinical practice recommendation is essential for effective management of perioperative cardiac arrest and will also provide guidance for further exploration of the management of perioperative cardiac arrest in the future.

In order to effectively prevent infection or severe acute respiratory syndrome coronavirus 2 transmission among medical staff during tracheal intubation in patients with suspected or confirmed coronavirus disease 2019(COVID-19), and to ensure the safety of personnel who will perform the endotracheal intubation, we made a literature review to analyze the airway management for SARS patients from China and abroad in 2003. Relevant documents, consensus of diagnosis and therapy for patients with COVID-19 from the National Health Commission, and guidelines of relevant academic societies were also reviewed.Thus, we provide suggestions on infection control for performing endotracheal intubation in patients with COVID-19 mainly as follows.Medical staff should fully understand the infection risk of COVID-19 and strengthen the training before the procedure.It is suggested that the indication of endotracheal intubation should be properly defined, and the need for intubation as emergent or elective should be evaluated early with preparation made in advance.During the implementation of endotracheal intubation, the procedure should be completed by the most experienced personnel in airway management using the tools they master best, and a rapid sequential induction of endotracheal intubation is recommended.

Objective To investigate the role and mechanism of ulinastatin on the hyper-permeability of vascular endothelial cell induced by matrix metalloproteinase-9 (MMP-9). Methods Human umbilical vein endothelial cells (HUVEC) were cultured in vitro to establish a complete monolayer vascular endothelial cell model. The monolayer vascular endothelial cells were randomly divided into three groups: blank control group [phosphate buffered saline (PBS) added], MMP-9 model group (1 mg/L MMP-9 added) and ulinastatin group (1 mg/L MMP-9 and 1 000 kU/L ulinastatin added). The permeability of monolayer vascular endothelial cells was measured by fluorescein isothiocyanate (FITC)-labeled dextran (FD40) leaking method; the soluble vascular endothelial cells calcium dependent adherin (VE-cadherin) concentration in culture solution was determined by enzyme linked immunosorbent assay (ELISA);the protein expression levels of zonular occlusion protein-1 or tight junction (ZO-1), VE-cadherin, claudin-5 were detected by Western Blot and immunofluorescence methods. Results Compared with the blank control group, the permeability of vascular endothelial cells in MMP-9 model group was significantly increased [(cm2/h, ×10-2):3.35±0.56 vs. 0.94±0.06, P < 0.05]; the concentrations of soluble VE-cadherin in the Transwell upper and lower chambers were increased significantly [upper chamber (μg/L): 5.02±0.40 vs. 3.83±0.42, lower chamber (μg/L):4.92±1.05 vs. 3.24±1.24, both P < 0.05]; the protein expression levels of ZO-1, VE-cadherin and claudin-5 were significantly decreased [ZO-1/β-actin: 0.152±0.067 vs. 0.262±0.090, VE-cadherin/β-actin: 0.137±0.048 vs. 0.246±0.094, claudin-5/β-actin: 0.148±0.062 vs. 0.336±0.119, all P < 0.05], and obvious rupture sites appeared in their fluorescent patterns, and fluorescent particles were significantly reduced; compared with MMP-9 model group, the permeability of vascular endothelial cells in ulinastatin group was significantly decreased [(cm2/h, ×10-2): 1.80±0.34 vs. 3.35±0.56, P < 0.05]; the soluble VE-cadherin concentrations were significantly reduced in upper and lower chambers than those in the MMP-9 model group [upper chamber (μg/L): 4.41±0.37 vs. 5.02±0.40, lower chamber (μg/L):3.85±1.04 vs. 4.92±1.05, both P < 0.05], the expressions of endothelial junction protein were significantly increased in ulinastatin group (ZO-1/β-actin: 0.229±0.097 vs. 0.152±0.067, VE-cadherin/β-actin: 0.236±0.089 vs. 0.137±0.048, claudin-5/β-actin: 0.262±0.101 vs. 0.148±0.062, all P < 0.05], and the continuity of their fluorescent patterns and fluorescent particles were both increased. Conclusion The in vitro experiment showed that the hyper-permeability of vascular endothelial cells induced by MMP-9 can be attenuated by ulinastatin through decreasing the destruction of VE-cadherin and maintaining the protein expression levels of ZO-1, VE-cadherin and claudin-5 in vascular endothelial cells.

Immune metabolism is an emerging highlight in recent years.Revealing the metabolic characteristics of different immune cells in different responses may provide new perspective and direction for the pathogenesis and therapy of many immune-related diseases.Sepsis is a complex systemic inflammation caused by trauma,infection and other pathogenic factors.The immune cells have different metabolic features at different stages of the disease.These metabolic features are also involved in the regulation of immune cell proliferation,differentiation and function.By summarizing and analyzing the relevant literatures of immune cell metabolism and inflammation regulation in recent years,the metabolic regulatory factors of different immune cell subgroups and the related characteristics of immune cell metabolism in patients with sepsis were summarized.The in-depth understanding of the metabolic state in different immune cells,and the pathophysiological mechanism of septic immune disorders,especially the immune paralysis stage,would provide a theoretical basis for the clinical application of immune metabolic therapy.

Intestinal?barrier?act?as?the?crucial?defender?against?pathogen?invasion,?and?is?indispensable?in?maintaining?tissue?homeostasis?both?locally?and?systemically.?Severe?disease?can?lead?to?impaired?intestinal?barrier.?In?addition?to?cause?a?variety?of?gastrointestinal?diseases,?intestinal?barrier?damage?can?also?worsen?the?disease?progression?in?critically?ill?patients.?Innate?lymphoid?cells?(ILCs)?is?a?group?of?newly?defined?innate?immune?cells?which?have?some?characteristics?as?adaptive?immune?cells.?Group?3?innate?lymphoid?cells?(ILC3),?which?mainly?reside?at?gut?associate?mucosal?tissue,?have?been?reported?to?play?a?critical?role?in?maintaining?intestinal?barrier?function.?After?a?brief?introduction?about?its?origination?and?classification,?we?will?focus?on?function?of?ILC3?physiologically?and?pathologically,?and?provide?a?new?theoretical?basis?for?maintaining?intestinal?barrier?function?under?pathological?conditions?in??this?review.

Sepsis is a leading cause of death in critically ill patients.The definitions of sepsis and septic shock were introduced in 1991 and last revised in 2001.Since considerable advances had occurred to its pathophysiology and management,an update definitions for sepsis and septic shock were released in February 2016 by the Society of Critical Care Medicine and the European Society of Intensive Care Medicine.This article is to review the development and limitations of previous versions of sepsis definition,and summarize the sepsis 3.0 definition and its clinical diagnosis criteria.These updated definitions and clinical criteria will play vital roles in providing important reference frame for clinical trials,and facilitating early recognition and timely management of patients with sepsis.

Objective To evaluate the effect of lumbar multifidus muscle training on muscle thickness.Methods The morphological changes in volunteers' lumbar multifidus muscles were observed in response to 11 kinds of training.Muscle thickness was measured at rest and during contraction using ultrasonography and two examiners.The rate of change in muscle thickness and the contraction rate were calculated.Results There was no significant difference in the contraction rates determined by the two examiners using ultrasound imaging.There was no significant difference in average contraction rate between the males and females.Pairwise,there was no significant difference among contralateral leg-raising,ipsilateral leg-raising,contralateral hand-raising,ipsilateral hand-raising and contralateral leg-lifting.Pairwise,there was no significant difference among ipsilateral leg-lifting and ipsilateral arm-lifting compared with contralateral leg-lifting,contralateral arm-lifting or contralaleral lower limb-lifting.There was no significant difference between contralateral arm-lifting and ipsilateral arm-lifting.There was no significant difference between ipsilateral arm-lifting with contralateral leg-lifting and contralateral arm-lifting with ipsilateral leg-lifting.Pairwise,there was a significant difference in lumbar multifidus muscle contraction rates among these actions.Conclusion Lumbar multifidus muscle training has various effects.Muscle thickness as measured using ultrasonography can provide a basis for formulating a rehabilitation training plan.