Objective To investigate the effects of nitric oxide precursor L-arginine on traumatic pulmonary contusion. Methods Sixty Sprague-Dawley rats were randomly divided into three groups, ie. a normal group, a model group, and a L-arginine group. The model of traumatic pulmonary contusion was established with self-made chest-impacter. Then the rats in the L-arginine group was injected intravenously with L-arginine in a dose of 250 mg/kg. All rats were sacrificed at 24 hours after these models established.Levels of TNF-α and nitric oxide ( NO2 - /NO3- ) in serum were measured by ELISA and diazo-reaction method. Lung wet/dry weight ratio, NF-κB, endothelin-1, apoptotic cell, and ICAM-1 ( intercellular adhesion molecule-1) mRNA expressions in the lung tissue were measured. Results Compared with the model group,TNF-αand lung wet/dry weight ratio decreased significantly in the L-arginine group( P lt; 0. 05) . After the L-arginine treatment, the concentration of nitric oxide, apoptotic index were significantly higher than the model group ( P lt; 0. 05) . The expressions of NF-κB, endothelin-1, and ICAM-1 mRNA in the L-arginine group were lower than those in the model group ( P lt;0. 05) . Conclusion L-arginine treatment can downregulate the expressions of NF-κB, ET-1, ICAM-1 mRNA and apoptosis obviously, and ameliorate the microcirculation of rats lung with traumatic pulmonary contusion.
Abstract： As the most common blunt thoracic injury, lung contusion may develop into acute lung injury, adult respiratory distress syndrome or ventilation associated pneumonia, which can cause a high mortality. However, the pathogenesis and pathophysiology of lung contusion is not well understood yet. Stress is laid by many researchers on inflammatory response in the pathogenesis of lung contusion. We review the potential role of inflammatory response in the pathogenesis and pathophysiological changes of lung contusion. Emphasis is put on studies of inflammatory cells, mediators, receptors, surfactant dysfunction, and the potential role of epithelial cell or neutrophil apoptosis. The animal models are essential to the study of lung contusion and the studies examining secondary injuries exacerbating lung contusion are also noted.
Pulmonary contusion is frequent and a serious injury in the chest trauma patients in emergency department. And it is easy to induce acute respiratory distress syndrome (ARDS) and respiratory failure. Since the development of modern technology and transportation, flail chest with pulmonary contusion happens more frequently than the past. And its complications and mortality are higher. In order to understand it better and improve the effect of the therapy on flail chest with pulmonary contusion, we reviewed the relative literatures. In this article, the main contents are as followed:① The pathophysiological changes of pulmonary contusion; ② The pathophysiological changes of flail chest with pulmonary contusion; ③ Clinical manifestation of flail chest with pulmonary contusion; ④ Imaging change of flail chest with pulmonary contusion; ⑤ progress in diagnosis and treatment.
ObjectiveTo observe the clinical efficacy of ulinastatin combined with low-dose arginine vasopressin in treating severe pulmonary contusion. MethodSixty patients with severe pulmonary contusion were enrolled in our hospital between April 2012 to June 2014 year. All the patients were randomly divided into three groups. They were respectively defined as a routine treatment group (group A, n=20), an ulinastatin treatment group (group B, n=20), and a combined treatment group (group C, n=20). The respiratory frequency (RR), oxygenation index, partial pressure of carbon dioxide (PaCO2), the change of chest X-ray and the change of serum interleukin-6 (IL-6), IL-8 levels were compared among three groups before and after therapy. ResultThe respiration frequency(RR) and the concentration of serum IL-6, IL-8 levels were decreased in the group C before and after treatment with statistical differences (P=0.000, 0.000, 0.000). PaO2/FiO2 and PaCO2 were significantly increased in the group C before and after treatment (P=0.000, 0.000). After treatment for 7 d, the respiration frequency (RR) and the concentration of serum IL-6, IL-8 of patients in the group B decreased significantly compared with those in the group A (P=0.000, 0.043, 0.000). While PaO2/FiO2, PaCO 2 and the score of chest X-ray increased significantly in the group B (P=0.010, 0.000, 0.000). Compared with those in the group B, RR and the concentration of serum IL-6, IL-8 of patients in the group C decreased significantly (P=0.000, 0.045, 0.000), while PaO2/FiO2, PaCO2 and the score of chest X-ray increased significantly (P=0.043, 0.010, 0.001). ConclusionUlinastatin combined with low-dose arginine vasopressin shows obvious effects in the patients with severe pulmonary contusion. And its therapeutical effects are better than that of the other two treatment options.
目的 探讨胸外伤开胸探查的手术指征及救治策略。 方法 回顾性分析我院自 2006 年 1 月至 2014 年 12 月经开胸探查救治 51 例胸外伤患者的临床资料，其中男 43 例、女 8 例，年龄 24（17～75）岁。 结果 全组损伤严重度评分（ISS）平均 19.4 分。闭合性损伤 16 例，开放性损伤 35 例，治愈 45 例（88.24%），死亡 6 例（11.76%）。死亡原因为心脏破裂、失血性休克、感染性休克、多器官功能障碍综合征（MODS）、弥散性血管内凝血（DIC）。 结论 及时就医、快速诊断、准确把握手术指征、多科室联合诊治是救治胸外伤的关键。
ObjectiveTo explore the clinical significance of prone position in the treatment of patients with acute respiratory distress syndrome (ARDS) caused by pulmonary contusion.MethodsA retrospective analysis was conducted on pulmonary contusion patients in the Intensive Care Medicine (ICU) from January 2017 to April 2021. The patients were divided into a prone position group (n=121) and a control group (n=117) after screening. The patients' basic conditions, occurrence of ARDS (P/F<150 mm Hg), changes in vital signs, laboratory examinations, lung compliance and other changes after treatment, mechanical ventilation time, staying in ICU, complications, and mortality were recorded and conpared between the two groups.ResultsWhen ARDS [oxygenation index (P/F)<150 mm Hg] occurred, compared with 1 day later, the P/F [(125.7±15.3) vs. (209.5±22.4) mm Hg , P<0.05] and lung compliance [(64.6±4.8) vs. (76.0±5.4) mL/cm H2O, P<0.05] increased in the prone position group. Compare with the control group after 1 day of treatment ARDS (P/F<150 mm Hg), P/F [(209.5±22.4) vs. (126.1±19.5) mm Hg, P<0.05] and lung compliance [(76.0±5.4) vs. (63.5±5.5) mL/cm H2O, P<0.05] increased in the prone position group (P<0.05). Compare with the control group, the prone position group had shortened mechanical ventilation time and ICU stay time, less atelectasis, lower mortality (P<0.05), lower occurrence of pneumothorax (P>0.05).ConclusionProne position treatment for patients with pulmonary contusion after ARDS (P/F<150 mm Hg) can correct hypoxemia faster, improve lung compliance, reduce atelectasis, shorten mechanical ventilation time and stay time of ICU, and reduce mortality, hence it has clinical value.