Consensus Meeting on Microdialysis in Neurointensive Care

Background Microdialysis is used in many European neurointensive care units to monitor brain chemistry in patients suffering subarachnoid hemorrhage (SAH) or traumatic brain injury (TBI).Discussion We present a consensus agreement achieved at a meeting in Stockholm by a group of experienced users of microdialysis in neurointensive care, defining the use of microdialysis, placement of catheters, unreliable values, chemical markers, and clinical use in SAH and in TBI.Conclusions As microdialysis is maturing into a clinically useful technique for early detection of cerebral ischemia and secondary brain damage, there is a need to following such definition regarding when and how to use microdialysis after SAH and TBI.     

创伤性颈脊髓损伤患者气管切开时机 及预后的临床研究

目的 研究创伤性颈脊髓损伤患者的气管切开时机及临床预后。方法 回顾性分析2008年1月1日至2021年12月31日在丽水市中医院收治的单节段创伤性颈脊髓损伤合并呼吸功能不全且接受气管切开治疗的患者65例。根据从气管插管到初次气管切开的时间将患者分为早期组（从插管到气管切开≤7d,n=31）和晚期组（从插管到气管切开>7d,n=34）,比较两组患者机械通气时间、拔管时间和重症监护病房（intensive care unit,ICU）住院时间等指标。结果 早期组患者机械通气时间（23.9±16.5）d,较晚期组（37.3±25.7）d明显缩短（t=?10.310,P=0.025）;早期组患者ICU住院时间（19.7±5.5）d,明显短于晚期组（26.8±12.4）d（t=?9.058,P=0.021）;早期组患者拔管时间（51.0±27.1）d,明显短于晚期组（73.1±46.8）d（t=?10.039,P=0.021）,差异均有统计学意义（P<0.05）。两组患者的肺部感染发生率、病死率及90d再住院率比较,差异无统计学意义（P>0.05）。结论 对于短时间不能脱离机械通气的急性创伤性颈脊髓损伤患者,在插管后7d内进行气管切开,可减少机械通气和ICU住院时间,改善患者的预后且不增加并发症发生率。     

Straight leg elevation to rule out pelvic injury

ObjectivePelvic x-ray is frequently used as a screening tool during initial assessment of injured patients. However routine use in the awake and alert blunt trauma patient may be questioned due to low yield. We propose a clinical tool that may avoid unnecessary imaging by examining whether the ability to straight leg raise, without pain, can rule out pelvic injury.MethodsWe conducted a prospective cohort study with the exposure variables of ability to straight leg raise and presence of pain on doing so, and presence of pelvic fracture on x-ray as the primary outcome variable.ResultsOf the 328 participants, 35 had pelvic fractures, and of these 32 were either unable to straight leg raise, or had pain on doing so, with a sensitivity of 91.43% (95% CI: 76.94–98.2%) and a negative predictive value of 98.57% (95% CI: 95.88–99.70%). The 3 participants with a pelvic fracture who could straight leg raise with no pain, all had a GCS of less than 15, and therefore, among the sub-group of patients with GCS15, a 100% sensitivity and 100% negative predictive value for straight leg raise with no pain to rule out pelvic fracture was demonstrated.ConclusionAmong awake, alert patients, painless straight leg raise can exclude pelvic fractures and be incorporated into initial examination during reception and resuscitation of injured patients.     

Helmet under-utilization by children during equestrian events is associated with increased traumatic brain injury

Purpose

Awareness of equestrian related injury remains limited. Studies evaluating children after equestrian injury report under-utilization of safety equipment and rates of operative intervention as high as 33%.

次氯酸冲洗的体外安全性及有效性评估

目的：体外实验评估不同次氯酸冲洗用于预防骨折感染的安全性及抗菌效果性方法：体外不同浓度次氯酸刺激小鼠L929和MC3T3细胞,检测细胞克隆形成、增殖及调亡情况评估次氯酸安全性。小鼠红细胞溶血实验评估次氯酸溶血风险。金黄色葡萄球菌及大肠杆菌增殖和抑菌圈实验评估次氯酸有效性及敏感细菌。结果：体外实验表明低浓度次氯酸对小鼠L929和MC3T3细胞的增殖无影响,小鼠红细胞溶血实验阴性。抗菌实验表明低浓度次氯酸具有与碘伏及双氧水类似的抑菌效果,但与其他消毒剂对比无明显差异。结论：本实验结果为低浓度次氯酸应用于临床治疗骨科感染提供体外研究数据。发现低浓度次氯酸安全性高,对革兰阳性菌引起的骨感染治疗效果好,是潜在的临床治疗感染性骨髓缺损、骨髓炎及开放性骨折的清创冲洗剂。     

A pilot study on the effects of early use of valproate sodium on neuroinflammation after traumatic brain injury北大核心CSCD

Objective To study the effect of early use of sodium valproate on neuroinflammation after traumatic brain injury (TBI). Methods A total of 45 children who visited in Xuzhou Children's Hospital Affiliated to Xuzhou Medical University from August 2021 to August 2022 were enrolled in this prospective study, among whom 15 healthy children served as the healthy control group, and 30 children with TBI were divided into a sodium valproate treatment group and a conventional treatment group using a random number table (n=15 each). The children in the sodium valproate treatment group were given sodium valproate in addition to conventional treatment, and those in the conventional group were given an equal volume of 5% glucose solution in addition to conventional treatment. The serum concentrations of nucleotide-binding oligomerization domain-like receptor protein 3(NLRP3), high-mobility group box 1 (HMGB1), tumor necrosis factor-α (TNF-α), and interleukin-1β (IL-1β) were measured in the healthy control group on the day of physical examination and in the children with TBI on days 1, 3, and 5 after admission. Glasgow Outcome Scale-Extended (GOS-E) score was evaluated for the children with TBI 2 months after discharge. Results Compared with the healthy control group, the children with TBI had significantly higher serum concentrations of NLRP3, HMGB1, TNF- α, and IL-1β on day 1 after admission (P<0.017). The concentration of NLRP3 on day 5 after admission was significantly higher than that on days 1 and 3 after admission in the children with TBI (P<0.017). On days 3 and 5 after admission, the sodium valproate treatment group had a significantly lower concentration of NLRP3 than the conventional treatment group (P<0.05). For the conventional treatment group, there was no significant difference in the concentration of HMGB1 on days 1, 3, and 5 after admission (P>0.017), while for the sodium valproate treatment group, the concentration of HMGB1 on day 5 after admission was significantly lower than that on days 1 and 3 after admission (P<0.017). On day 5 after admission, the sodium valproate treatment group had a significantly lower concentration of HMGB1 than the conventional treatment group (P<0.05). For the children with TBI, the concentration of TNF-α on day 1 after admission was significantly lower than that on days 3 and 5 after admission (P<0.017). On days 3 and 5 after admission, the sodium valproate treatment group had a significantly lower concentration of TNF-α than the conventional treatment group (P<0.05). The concentration of IL-1β on day 3 after admission was significantly lower than that on days 1 and 5 after admission (P<0.017) in the children with TBI. On days 3 and 5 after admission, the sodium valproate treatment group had a significantly lower concentration of IL-1β than the conventional treatment group (P<0.05). The GOS-E score was significantly higher in the sodium valproate treatment group than that in the conventional treatment group 2 months after discharge (P<0.05). Conclusions Early use of sodium valproate can reduce the release of neuroinflammatory factors and improve the prognosis of children with TBI. © 2023 Xiangya Hospital of CSU. All rights reserved.     

Invasive fungal infection in immunocompetent trauma patients – A case series

Zygomycosis is the third leading cause of invasive fungal infection after candidiasis and aspergillosis. Although zygomycosis mostly affects immunocompromised individuals trauma may potentiate infection in immunocompetent individuals. The mortality rate of Zygomycosis is around 50% due to angioinvasion. Here we report a series of 5 cases of angio invasive fungal infection in immunocompetent individuals who sustained trauma in urban areas, out of which only one patient survived following high above knee amputation.     

Comparison of fondaparinux sodium and low molecular weight heparin in the treatment of hypercoagulability secondary to traumatic infection

Purpose: To compare the effects and side-effects of fondaparinux sodium and low molecular weight heparin in patients with hypercoagulability accompanied with traumatic infection. Methods: Thirty-six patients with post-traumatic infections in our hospital intensive care center were diagnosed with hypercoagulability from February 2012 to February 2013. These patients were randomly divided into 2 groups. In group F (18 patients), the patients were treated with fondaparinux sodium, 2.5 mg, 1/d for 11 d. In group L (18 patients), the patients were treated with low molecular weight heparin, 4100 U, 1/12 h for 11 d. The incidence of deep vein thrombosis, bleeding events and multiple organ dysfunction syndrome (MODS) and mortality of two groups after anticoagulation therapy were analyzed. Fibrinogen, D-dimer level and activity of antithrombin III were measured by the coagulation analyzer. Results: The incidence of deep vein thrombosis, MODS incidence and mortality were not significantly different between the two groups. The rate of bleeding evens in group F was lower than group L (p < 0.05). Antithrombin III got an upward trend after anticoagulant therapy, in which it was higher in group F than in group L on the 5th d and 11th d (p<0.05). Fibrinogen levels were gradually increased, and there was no significant difference between two groups (p>0.05). D-dimer was significantly decreased after anticoagulant therapy for 5 d (p<0.01), and there were significant differences between two groups on the 5th d and 7th d (p < 0.05). It showed no significant difference on the 11th d (p>0.05). Conclusion: Fondaparinux sodium and low molecular weight heparin can effectively improve coagulopathy in patients with traumatic infection. Compared with low molecular weight heparin, fondaparinux sodium may reduce the risk of bleeding events in patients with hypercoagulability accompanied by traumatic infection.     

外伤性脾破裂腹腔镜与开腹脾切除临床研究

【摘要】〓目的〓对比腹腔镜脾切除术(LS)与开腹脾切除术(OS)在外伤性脾破裂治疗的临床疗效,探讨LS的可行性、安全性。方法〓将45例外伤性脾破裂患者根据手术方式分为腹腔镜组(LS组)和开腹组(OS组)。LS组18例,OS组27例,比较2种术式的手术时间、手术出血量、术后肛门排气时间、术后住院时间以及并发症发生率。结果〓LS组的平均手术时间与OS组差异无统计学意义(P>0.05),手术出血量、术后肛门排气时间、术后住院时间以及并发症发生率均优于OS组。差异有统计学意义(P<0.05)。结论〓腹腔镜脾切除术治疗外伤性脾破裂的临床疗效优于传统开腹手术,在临床上是可行、安全有效的。     

Axonal fusion via conduit-based delivery of hydrophilic polymers

Background

Hydrophilic polymers have been shown to improve physiologic recovery following repair of transected nerves with microsutures. Our study was designed to combine hydrophilic polymer therapy with nerve tubes (NT) to enhance polymer delivery to the site of nerve injury.

Methods

Using a rat sciatic nerve injury model, a single transection injury was repaired in an end-to-end fashion with NT + polyethylene glycol (PEG) to NT alone. Compound action potentials (CAPs) were recorded before nerve transection and after repair. Behavioral testing was performed for 5 weeks.

Results

PEG therapy restored CAPS in all, but one, animals, while no CAPS were recorded in animals not receiving PEG. Behavioral nerve function was measured using the standardized functional assessment technique and foot fault asymmetry scores (FF). FF scores were improved for the PEG therapy groups on postoperative days 7, 14, and 21. However, after expected eventual axonal outgrowth, the benefit was less noticeable at days 28 and 35. Immunohistochemistry of the distal axon segments showed an increase number of sensory and motor axons in the NT + PEG group as compared to NT alone.

Conclusion

These data suggest that PEG delivery via a conduit may provide a simple, effective way to fuse severed axons and regain early nerve function. For proximal nerve injuries in large animals, recovery of axonal continuity could dramatically improve outcomes, even if fusion only occurs in a small percentage of axons.