Towards the heterogeneity of sepsis / 医学研究生学报

Sepsis is a heterogeneous syndrome which varies in etiology, pathogenesis, clinical manifestation, treatment and prognosis. According to the difference in these respects, sepsis can be divided into different phenotypes and endotypes, which may serve as valuable guidance in the individualized clinical treatment and precise prognostic judgment of the disease.

Focus on the diagnosis and treatment of severe burn induced coagulopathy / 医学研究生学报

The treatment of severe burn involves circulation, respiration, infection, surgical operation and so on. Coagulation disorder is also one of the main problems in severe burn patients, but there is no definite standard of diagnosis and treatment. The above clinic problems also weaken the diagnosis and treatment of the Severe Burn Induced Coagulopathy (SBIC). Therefore, for a long time, specialist medical staff have lost sensitivity to SBIC, missing diagnosis and misdiagnosis often occur, affecting prognosis. In this article, the pathogenesis, clinical manifestation, diagnosis and treatment of SBIC are described. The purpose is to make specialist medical staff pay attention to the diagnosis of SBIC and to start comprehensive intervention as soon as possible, in order to improve the prognosis.

A few considerations on trauma care in a modern naval warfare / 解放军医学杂志

Building a powerful navy is the key to safeguarding China’s maritime rights and interests and developing maritime strategy. Improving the level and capability of trauma care for naval battle is one of the important tasks for safeguarding naval combat capability and keeping up morale. This paper analyzes the characteristics of naval battle and both the key points and difficulties of medical support under the conditions of modern war, and draws lessons from the experiences of United States navy in the construction of medical support mode, force allocation and maritime health platform, and refers to its training mode and evaluation methods by relying on advanced medical equipment to carry out simulated trauma care efficiently. This paper considers and analyzes the mode of maritime health support, the allocation and utilization of mobile medical service force, the research work related to trauma for naval battle and the training of health professionals. The aim of this study was to provide some effective suggestions for improving capacity and efficiency of trauma care for naval battle.

Analgesic and sedative effects of inhaling a mixture of nitrous oxide and oxygen on burn patient during and after dressing change / 中华烧伤杂志

<p><b>OBJECTIVE</b>To investigate the analgesic and sedative effects of inhaling a mixture of nitrous oxide and oxygen on burn patient during and after dressing change.</p><p><b>METHODS</b>A total of 240 burn patients hospitalized in the Institute of Burn Research of Changhai Hospital Affiliated to the Second Military Medical University, Department of Burns of the First People's Hospital in Zhengzhou, and Department of Burns and Plastic Surgery of General Hospital of Ningxia Medical University from October 2011 to September 2012 were enrolled in our study, and they were all in accordance with the inclusion criteria. The 240 patients were divided into control group (n = 60, treated with inhalation of oxygen during dressing change) and treatment group (n = 180, treated with inhalation of a mixture of 65% nitrous oxide and oxygen during dressing change) according to the computer-generated list of random number. The other treatments in control group and treatment group were the same. Before, during, and after dressing change, heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP), oxygen saturation (SO2), and adverse effects were observed. The degree of pain and anxiety felt by the patients were respectively evaluated with the visual analogue scale (VAS) and Chinese version of the burn specific pain anxiety scale (C-BSPAS) at the same time points as above. Data were processed with analysis of covariance, chi-square test, analysis of variance, and rank sum test.</p><p><b>RESULTS</b>There were no significant differences between control group and treatment group in the levels of HR, SBP, DBP, and SO2 before dressing change (with F values respectively 0.76, 0.06, 1.11, 0.70, P values all above 0.05). Compared with those of control group, the levels of HR, SBP, DBP, and SO2 in treatment group were significantly ameliorated during dressing change (with F values respectively 81.78, 146.36, 226.44, 205.62, P values all below 0.01). After dressing change, the levels of DBP in the two groups were close (F = 0.31, P > 0.05), but the levels of HR, SBP, and SO2 showed statistical differences (with F values respectively 7.02, 8.69, 12.23, P < 0.05 or P < 0.01). Before dressing change, the VAS scores were approximate between control group and treatment group (Z = 0.21, P > 0.05). Compared with those in control group (9.4 ± 0.7, 1.7 ± 2.5), the VAS scores were significantly lowered in treatment group during and after dressing change (1.6 ± 1.3, 0.7 ± 1.1, with Z values respectively 11.84, 3.35, P values all below 0.01). There was no significant difference in C-BSPAS score between control group and treatment group before dressing change (Z = 0.62, P > 0.05). Compared with those in control group (75 ± 13, 73 ± 12), the C-BSPAS scores in treatment group were decreased during and after dressing change (9 ± 15, 9 ± 14, with Z values respectively 11.91, 12.28, P values all below 0.01). There were no obvious adverse effects in two groups before, during, and after dressing change.</p><p><b>CONCLUSIONS</b>A mixture of nitrous oxide and oxygen seems to have obvious analgesic and sedative effects on burn patients during dressing change, and it can be widely used.</p>

Study and translation of systemic control technology for the burn and trauma related lung injuries / 中华烧伤杂志

Burns and traumas are common injuries during both peace time and wartime. Lung is the earliest organ subjected to dysfunction and the incidence is highest. The systemic protective technology for the burn and trauma related lung injuries is based on evidence-based medicine and translational medicine. It includes a series of effective measures, such as rescue and treatment scheme for massive burn casualties, prophylactic tracheostomy, protective ventilation strategy, sequential cell protection, and prevention and treatment of sequelae, which prevents aggravation of lung injuries caused by ischemia reperfusion, oxidative stress, and iatrogenic factors, as well as reduces the incidence of complications to ensure the recovery after burns and traumas.

Fungal infection after a tragedy: a report of three cases of candidosis in a fire accident / 中华医学杂志(英文版)

Patients who suffer severe burns are at increased risk for local and systemic infections. The incidence of fungal infections has increased in recent years, and these infections represent a major issue in burn intensive care units. Herein, we report three cases of fungal infection due to Candida species occurring in patients undergoing supportive therapy and antibiotic treatment during their hospitalization. Two of these patients were infected with Candida parapsilosis, and one was infected with Candida albicans. The risk factors for these patients' Candida infections were multiple and prolonged courses of antimicrobial treatment, steroid treatment, tracheal intubation and smoke inhalation. Susceptibility testing of nine antifungal compounds was performed, and the minimum inhibitory concentration (MIC) values of all isolated strains were lower than the breakpoint MIC value for resistance of the relevant drug. All three patients were cured by treatment with antifungal agents. Candida infection may occur 1 - 3 weeks after thermal injury, and the prompt recognition and treatment of such infections with antifungal therapies may result in decreased morbidity and mortality associated with these infections in burn patients.

Pediatric burns due to hot water from water dispenser: a neglected issue that should be highly concerned / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>More and more Chinese drink hot water from water dispensers while many children were scalded due to this change. The present study aimed to propose a feasible strategy for prevention.</p><p><b>METHODS</b>A retrospective study was conducted for all water dispensers related pediatric burns admitted to Changhai Hospital from January 2005 to December 2009.</p><p><b>RESULTS</b>The number of new cases and incidences of pediatric burns due to hot water from water dispensers was significantly increasing year after year. In the total 238 involved cases, 175 cases happened on males and 78.9% were at the age of 1 - 4 years. The burn areas were mainly located in upper extremities. All water dispensers in the surveyed families had no isolate protection devices and 85.2% of their locations were easy for children to reach. Nearly half of the children were in the same room with their guardians when injured. Total 196 burned children were playing the taps of water dispensers before injured, unfortunately, 80.6% of them have not been stopped until burned.</p><p><b>CONCLUSION</b>As the kind of burns is quite serious and with bad outcome, some recommendations should be followed, such as buying water dispensers with protection devices, keeping children from touching them and so on.</p>

Lay emphasis on the treatment of massive burn casualties in conflagration / 中华烧伤杂志

Burn surgery belongs to disaster medicine. Burn is a common trauma that occurs in social activities of human beings in all ages, either in the time of peace or war. During the development of human medicine in modern times, the summary of experience in treating massive burn casualties due to severe fire accidents has effectively promoted the renovation of treating technology and theory of burns and the development of burn surgery. The results of treatment of burn injury in casualties occurred in the fire of Cocoanut Grove night club in Boston in 1942, and the high-rise apartment house fire in Shanghai in 2010 were summarized and analyzed in this article, emphasizing the correlating issues of inhalation injury.

Advancement in the research of mechanism of endogenous cellular injury in visceral complications as complications after severe burn / 中华烧伤杂志

It is of great importance to know the endogenous mechanism in burn-induced organ injuries, not only for the understanding of pathophysiological processes after burn, but also for guiding the clinical treatment. Recent studies have widened and deepened our scope and understanding of secondary injuries to various organs. However, a unanimous understanding of molecular pathway involved in all burn-induced organ injuries has not been attained. Relatively, the mechanism of endogenous cellular injuries as a result of burn injury could be regarded as a common one to explain the causation of cellular injury, and to guide the prevention and treatment for the burn-induced complications using cytoprotection strategy. This review summarized four aspects of the mechanism of endogenous cellular injuries, including cellular injuries induced by ischemic/hypoxic-oxidative stress, excessive inflammatory factors released by inflammatory cells, immunosuppression caused by suppression of function of adaptive immune cells, and dysfunction of important supportive cells of various organs.

Repair system engineering and the concept of sequential cytoprotection in treatment of burn / 中华烧伤杂志

It has been an essential trend to understand and solve the difficult problems arising in the treatment process of burn with views of holistic theory. Recent researches have indicated that the driven factors and the termination signals of repair system engineering in treatment of burn are the unity of two opposite rather than two independent bodies with chronological order. Repair driven factors are germinated at the cost of systemic inflammatory response and even multiple organ damage. Inflammatory response is both a necessary procedure of burn repair and the pathological basis of multiple system dysfunction after burn. A comprehensive burn therapy nominated sequential cytoprotection (SCP) strategy has emerged in which the knowledge derived from basic research is translated to clinical practice stepwise, and it might play an important role in treatment of severe burn. Further multi-center randomized controlled clinical trials should be conducted in order to raise the level of SCP strategy in guideline of evidence-based medicine.

Unplanned decannulation of tracheotomy tube in massive burn patients: a retrospective case series study / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Unplanned extubation is associated with adverse outcomes in intensive care unit. The massive burn patient differs from other critically ill patients in many ways. However, little is known about the unplanned decannulation (UD) in Burn Intensive Care Unit. This paper describes the special features of the circumstances and outcome of UD of tracheotomy tube in massive burn patients.</p><p><b>METHODS</b>A case series study was performed between January 1999 and December 2008 and UD of tracheotomy tube was analyzed retrospectively. A total of 21 patients with 29 UD events were identified. Demographic data, diagnosis, intervention, UD events and outcome of UD patients were collected. Differences in proportions were compared using the chi-square (χ(2)) or Fisher's exact test.</p><p><b>RESULTS</b>Patients with UD were often burned with head and neck (67%) and combined with inhalation injury (62%). The majority of them (76%) were transferred patients, occurred early (55%) and were accidental UD (79%). UD events tended to happen in day shift (90%) and to be associated with the medical procedure that was performing by caregivers at besides (79%). Loose of the stabilizing rope, medical procedure and tracheotomy malposition were the main causes of UD. Early UD and reintubation failure were associated with patients' death.</p><p><b>CONCLUSIONS</b>UD happened to massive burn patients can lead to patient death. Careful management of respiratory tract was essential for massive burn patients.</p>

Effect of hydrogen-rich saline on blood pressure and antioxidant ability of lung tissue in scalded rats following delayed resuscitation / 中华烧伤杂志

<p><b>OBJECTIVE</b>To study the effect of hydrogen-rich saline on blood pressure and antioxidant ability of lung tissue in scalded rats following delayed resuscitation.</p><p><b>METHODS</b>The hydrogen-rich saline was prepared (hydrogen-saturated normal saline with hydrogen concentration of 0.6 mmol/L). Twenty SD rats were divided into hydrogen-rich saline group (HS) and normal saline group (NS) according to the random number table, with 10 rats in each group. All the rats were subjected to 30% total body surface area (TBSA) full-thickness scald. Rats in HS and NS groups were infused with hydrogen-rich saline or normal saline with one half of the total fluid replacement volume as calculated according to the Parkland formula (4 mL×kg(-1)×%TBSA(-1)) at post scald hour (PSH) 7 and one-quarter of the volume at PSH 9 and 17 respectively. The general condition of rats during the experiment was observed. The systolic pressure of rats was measured at PSH 6 and 24. All rats were sacrificed at PSH 24 to collect lung tissue for detecting superoxide dismutase (SOD) inhibition ratio and malondialdehyde (MDA) level. Data were processed with t test.</p><p><b>RESULTS</b>All rats survived through the experiment. The systolic pressure of rats in HS group and NS group was respectively (87 ± 4) mm Hg (1 mm Hg = 0.133 kPa) and (86 ± 5) mm Hg at PSH 6, and the values were close (t = 0.213, P = 0.834); however the systolic pressure at 24 h was higher in HS group than in NS group [(124 ± 7) mm Hg vs. (115 ± 6) mm Hg, t = 2.958, P = 0.008]. SOD inhibition ratio of lung tissue in HS group [(0.465 ± 0.014)%] was higher than that in NS group [(0.358 ± 0.021)%, t = 11.767, P = 0.000]. MDA level of lung tissue in HS group [(922 ± 196) pmol/mg] was lower than that in NS group [(1118 ± 212) pmol/mg, t = -2.142, P = 0.046].</p><p><b>CONCLUSIONS</b>Delayed resuscitation for scalded rats with hydrogen-rich saline is helpful in the recovery of systolic pressure, and it can ameliorate lung tissue injury caused by reperfusion through enhancing the effect of antioxidase.</p>

Increased hsp70 of glucocorticoid receptor complex induced by scald and heat stress and its possible effect on the affinity of glucocorticoid receptor / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Glucocorticoid (GC) insensitivity/GC resistance is an important etiological and prognostic factor in multiple diseases and pathophysiological processes such as scald, shock and asthma. The function of GC was mediated by glucocorticoid receptor (GR). Scald not only decreased the expression of GR but also reduced the affinity of GR, which played an important role in GC resistance in scalded rats. Whereas the molecular mechanism responsible for the decrease of GR affinity resulted from scald remains unclear. Recent studies showed that the changes of heat shock proteins (hsp) especially hsp90 and hsp70 of GR heterocomplex were associated with GR low affinity in vitro.</p><p><b>METHODS</b>The affinity of GR in hepatic cytosols and in the cytosols of SMMC-7721 cells were determined by radioligand binding assay and scatchard plot. GR heterocomplex in cytosols were captured by coimmunoprecipation and the levels of hsp90 and hsp70 of GR complex were detected by quantitative Western blotting.</p><p><b>RESULTS</b>Similar with that of hepatic cytosol of scalded rats, a remarkable decrease of GR affinity was also found in the cytosol of heat stressed SMMC-7721 cells. The level of hsp70 of GR complex in hepatic cytosol of scalded rats (30% total body surface area immersion scald) and in cytosol of heat stressed human hepatocarcinoma cell line SMMC-7721 were both increased by 1.5 fold, whereas no change of hsp90 in GR heterocomplex was found. According to the correlation analysis, there may be a positive relationship between increased hsp70 of GR complex and decreased GR affinity in the cytosols.</p><p><b>CONCLUSIONS</b>The primary results indicated that the level of hsp70 of GR heterocomplex was increased in the hepatic cytosol of scalded rats and the cytosol of heat stressed SMMC-7721 cells. The increase of hsp70 of GR complex might be associated with the decrease of GR affinity.</p>

Repair of deep burn and traumatic wounds in lower extremities with combined transplantation of multiple pedicled skin flaps / 中华烧伤杂志

<p><b>OBJECTIVE</b>To summarize the clinical experience in repair of deep burn and traumatic wounds with combined transplantation of different types of pedicled skin flaps in lower extremities.</p><p><b>METHODS</b>Two hundred and thirty-six patients with 271 deep wounds in lower extremities after burn or trauma were repaired with muscular skin flaps, local fascial flaps and island flaps with vascular pedicle (more than 20 types) in our department from Jan. 1998 to Sept. 2008.</p><p><b>RESULTS</b>Complete necrosis of skin flaps occurred in 1 case, congestion and necrosis over the edge of skin flaps occurred in 3 cases, which were healed after grafting, and other skin flaps survived well with soft texture. Skin flaps were too bulky in 26 cases, among them 17 cases were thinned, and the appearance of other skin flaps were satisfactory. In 68 patients with functional region injury were recovered to certain extent without contracture.</p><p><b>CONCLUSIONS</b>Skin flaps with pedicles, multiple transplantations if necessary, can repair deep wounds satisfactorily in lower extremities after deep burn or trauma injury.</p>

Skin tissue engineering in China / 中华烧伤杂志

Great progress has been made in the basic research and clinical application of skin tissue engineering in China over the past 20 years. It includes culture of epithelial cells and their preliminary clinical use, research and development of various dermal substitutes such as acellular dermal matrix, spongiform collagen membrane and high molecular weight polymer membrane, and modification of physical properties of dermal substitutes for the sake of raising their bioaffinity and vascularization, based on which composite skin containing epithelial cell layers has been constructed and used successfully in the repair of full-thickness skin defects. More recently, greater efforts have been made in the study of new epithelial seeding cells such as epithelial stem cell and hair follicle stem cell. With the work going into the center, it is hopeful into constructing an artificial skin that mimics the normal human skin in terms of structure and function with better viability of the transplant, so that it can eventually be used in clinical practice as a skin source for large area deep burn patients to improve the wound healing quality.

Discussion on the fluid resuscitation and monitoring during burn shock period / 中华烧伤杂志

The index of monitoring burn shock resuscitation includes clinical signs and symptoms, laboratory examinations, hemodynamic variables. In recent years, there exists a tendency that the amount of transfused fluid for burn shock resuscitation is notably increased and complications of some cases, such as abdominal compartment syndrome have been reported. One of the major reasons for excessive fluid resuscitation is to try to normalize hemodynamic parameters with the help of invasive hemodynamic monitoring. Instead of hemodynamic variables, urinary output combined with other traditional variables still should be considered primary criteria of adequate fluid therapy. Specification of the variables of monitoring burn shock resuscitation is also the basis to revise and optimize the fluid resuscitation formula.

Role of c-Jun NH (2)-terminal kinase in insulin resistance after burn / 中华外科杂志

<p><b>OBJECTIVE</b>To investigate the role of c-Jun NH (2)-terminal kinase (JNk) in insulin resistance after burn and its mechanism.</p><p><b>METHODS</b>Twenty-four Sprague-Dawley rats were randomized to control, burn and burn + anisomycin groups. The rats in control group received sham burn trauma, and burn and burn + anisomycin groups received 30% total body surface area (TBSA) full thickness burn injury. Anisomycin (5 mg/kg) together with 250 microl dimethyl sulfoxide (DMSO) was injected to the rats in anisomycin group intravenously, and only 250 microl DMSO in the other two groups. Euglycemic-hyperinsulinemic glucose clamps was performed 2 hours after the injection. The changes of phospho-serine 307, phospho-tyrosine of insulin receptor substrate (IRS)-1 and phospho-JNK in muscle tissues were determined and compared using immunoprecipitation and Western blot analysis or immunohistochemistry in the three groups.</p><p><b>RESULTS</b>The infusing rates of total 10% glucose (mg x kg(-1) x min(-1)) in control, burn and burn + anisomycin group were 12.3 +/- 0.4, 6.6 +/- 0.3, 6.5 +/- 0.4, respectively. The level of IRS-1 Serine 307 phosphorylation and phospho-JNK in muscle increased significantly, while insulin-induced tyrosine phosphorylation of IRS-1 decreased markedly after burn.</p><p><b>CONCLUSIONS</b>The activation of JNK elevates the level of IRS-1 phospho-serine 307 and might play a role in insulin resistance after burn in rats.</p>

Hair follicle bulge cells / 中国医学科学院学报

Hair follicles reconstitute themselves though the hair cycle, suggesting the presence of stem cells. Slow-cycling cells were found in the bulge area and were considered as stem cells of the epidermis. Multiple studies have constantly demonstrated that bulge cells possess stem cell properties such as high proliferative capacity and multiple potencies to regenerate into not only hair follicles but also sebaceous glands and epidermis. Recently, the knowledge of the bulge cell biology is rapidly increasing along with the identification of novel cell surface markers, the ability to isolate living bulge cells, and the microarray analysis of multiple gene expression.

Reconstruction and transplantation of the composite skin comprising epithelial growth factor gene-transfected keratinocytes / 中国医学科学院学报

<p><b>OBJECTIVE</b>To investigate the epithelial growth factor (EGF) expression of EGF gene-transfected keratinocytes and its effect on cell proliferation after grafting.</p><p><b>METHODS</b>Newborn Balb/c mouse keratinocytes and gene transfected keratinocytes were seeded on the surface of acellular dermal matrix and cocultured in different ratios as follows: 1:1, 1:3, or 1:5 1 week after culture. The composite skin was grafted onto the full-thickness wound in Balb/c mouse. Specimen was harvested at interval after grafting and underwent the immunohistochemistry staining for EGF and proliferating cell nuclear antigen (PCNA).</p><p><b>RESULTS</b>Immunohistochemical staining showed EGF was expressed in the newly generated epidermis 1-2 week after grafting of the composite skin comprising Balb/c mouse keratinocytes and gene-transfected keratinocytes (at the ratio of 1:5). One week after surgery, Anti-PCNA positive basal cells were more than that in composite skin containing Balb/c mouse keratinocytes alone (P<0.01).</p><p><b>CONCLUSION</b>The gene-transfected keratinocytes expresses EGF and promotes the proliferation of keratinocytes in the early stage after transplantation.</p>

Activation of nuclear factor-kappaB signaling pathway in rat gastric mucosa during stress ulceration / 中华烧伤杂志

<p><b>OBJECTIVE</b>To investigate the time course of nuclear factor-kappaB (NF-kappaB) activation in the process of stress ulcer formation.</p><p><b>METHODS</b>Model of stress ulcer was reproduced by subjecting male Sprague-Dawley rats to water-immersion restraint (WIR) stress. At indicated time after the beginning of WIR stress, animals were sacrificed and cytoplasmic and nuclear protein and total RNA were prepared from gastric corpus mucosal tissues. DNA-binding activity of NF-KB was assessed as an index of NF-kappaB activation with electrophoretic mobility shift assay. Degradation of IkappaBalpha and IkappaBbeta, the inhibitory proteins of NF-kappaB, was analyzed by Western blot analysis. Expression of NF-kappaB dependent genes including tumor necrosis factor-alpha (TNF-alpha) , interleukin-1beta (IL-1beta), cytokine-inducible neutrophil chemoattractant-1 ( CINC-1), intercellular adhesion molecule-1 (ICAM-1), and inducible nitric oxide synthase (iNOS) was detected with Northern blot analysis.</p><p><b>RESULTS</b>WIR stress induced a rapid biphasic activation of gastric mucosal NF-kappaB within 15 min of the beginning of stress, peaking at 45 min and 360 min. Compared with baseline, NF-kappaB activation by stress was increased (10.6 +/- 1.3) and (8.9 +/- 1.2) fold at 45 min and 360 min, respectively (P < 0.01). Antibody supershift assays revealed that p50/p65 heterodimer was the major active component of mucosal NF-kappaB. Western blot analysis showed that degradation of IkappaBalpha and IkappaBbeta occurred at first and second wave of NF-kappaB activation. Corresponding with the rapid and persistent activation of NF-kappaB, the levels of TNF-alpha, IL-1beta, CINC-1 and ICAM-1 mRNA in gastric mucosa were markedly increased 15 to 30 min after stress, respectively. Up-regulation of iNOS mRNAs was observed 30 to 90 min after stress, and the expression of all of these genes was increased consistently until the end of stress.</p><p><b>CONCLUSION</b>NF-kappaB activation is an early event and may play an important role in proinflammatory gene over-expression in rat gastric mucosa during WIR stress.</p>