Clinical study on VATS combined mechanical ventilation treatment of ARDS secondary to severe chest trauma

Reconstruction of Fibrocartilage with Fibrous Alignment of Type I Collagen in Scaffold-Free Manner

For functional reconstruction of fibrocartilage, it is necessary to reproduce the essential mechanical property exhibited by natural fibrocartilage. The distinctive mechanical property of fibrocartilage is originated from the specific histological features of fibrocartilage composed of highly aligned type I collagen (Col I) and an abundant cartilaginous matrix. While the application of tensile stimulation induces highly aligned Col I, our study reveals that it also exerts an antichondrogenic effect on scaffold-free tissues constructed with meniscal chondrocytes (MCs) and induces downregulation of Sox-9 expression and attenuated glycosaminoglycan production. Modulation of mechanotransduction by blocking nuclear translocation of Yes-associated protein (YAP) ameliorated the antichondrogenic effect in the presence of tensile stimulation. Since MCs subjected to mechanical doses either by surface stiffness or tensile stimulation showed reversibility of YAP status even after a long-term exposure to mechanotransduction, fibrocartilage tissue was constructed by sequentially inducing tissue alignment by tensile stimulation followed by inducing cartilaginous matrix production in a tension-released state. The minimal tensile dose to constitute durable tissue alignment was screened by investigating the alignment of cytoskeleton and Col I after culturing the scaffold-free tissue constructs with various tensile doses (10% static tension for 1, 3, 7, and 10 days) followed by maintaining in a released state for 5 days. Fluorescence-conjugated phalloidin binding and immunofluorescence of Col I indicated that the duration of static tension for more than 7 days resulted in durable tissue alignment for at least 5 days in the tension-released state. The tissues subjected to tensile stimulation for 7 days followed by 14 days in a released state in chondrogenic media resulted in abundant cartilaginous matrix as well as uniaxial anisotropic alignment. Our results show that the optimized tensile dose can facilitate the successful reconstruction of fibrocartilage by modulating the characteristics of matrix production by MCs.

Risk Factors Analysis of Thoracic Trauma Complicated With Acute Respiratory Distress Syndrome and Observation of Curative Effect of Lung-Protective Ventilation

Purpose

To explore the risk factors of acute respiratory distress syndrome (ARDS) secondary to thoracic trauma and the therapeutic effect of protective lung ventilation in patients with acute respiratory distress syndrome complicated with thoracic trauma.

Methods

We collected 206 patients with thoracic trauma admitted to our hospital from September 2017 to March 2021, counted the incidence of ARDS and analyzed the risk factors of ARDS. To observe the clinical efficacy of the application of lung-protective ventilation therapy in patients with thoracic trauma combined with ARDS.

Results

Among 206 patients with thoracic trauma, there were 82 cases of combined ARDS, and its incidence was 39.81%. The 82 patients with ARDS were randomly divided into the control group and the observation group with 42 cases each, and different ventilation methods were used for treatment. The results showed that the mechanical ventilation time (MVT) was shorter in the observation group than in the control group, and the incidence of ventilator-associated lung injury (VALI) and case fatality rate (CFR) were lower than those in the control group (P < 0.05). Arterial partial pressure of oxygen (Pa0₂), arterial blood carbon dioxide partial pressure (PaCO₂), and Oxygenation index (arterial partial pressure of oxygen/Fraction of inspiration O₂, PaO₂/FiO₂) were significantly improved better in both groups after treatment; compared with the control group, patients in the observation group had higher Pa02 levels and lower PaCO₂ levels at 8 h and 24 h after ventilation (P < 0.05). Multivariate analysis revealed that blunt trauma, massive blood transfusion, procalcitonin (PCT) level, tumor necrosis factor-α (TNF-α) level, and acute physiology and chronic health score (APACHE II) were all risk factors for Thoracic trauma with ARDS.

Conclusion

Risk factors for the development of ARDS after thoracic trauma are blunt injuries, massive blood transfusion, high PCT and TNF-α levels, and high APACHE II scores, which can be given active interventions in the early stage of clinical practice to improve patient prognosis. The use of protective lung ventilation therapy can improve the clinical outcome of patients with thoracic trauma combined with ARDS, which is important for improving the ventilation effect and respiratory function of patients.

Thoracoscope and thoracotomy in the treatment of thoracic trauma

Objective:

To compare clinical effects of thoracoscopic surgery and thoracotomy in the treatment of thoracic trauma.

Methods:

Two hundred and fourteen patients with thoracic trauma were randomly divided into a control group and an observation group, 107 in each group. The control group was treated with conventional thoracotomy, while the observation group was treated with thoracoscopic surgery. The operation-related indications, hospitalization, postoperative complications and inflammatory factor level were observed and compared between the two groups. The study was conducted from April 2016 to February 2018.

Results:

The duration of operation of the observation group was shorter than that of the control group, the amount of bleeding during operation of the observation group was less than that of the control group, and the postoperative visual analogue score (VAS) of the observation group was lower than that of the control group; the difference were statistically significant (P<0.05). The hospitalization time, time of off-bed activity and time of resuming daily life of the observation group were shorter than those of the control group, and the amount of drainage fluid of the observation group within 24 hours after operation was less than that of the control group; the differences had statistical significance (P<0.05). There was no significant difference in the incidence of postoperative complications between the two groups (P>0.05). The levels of C-reactive protein (CRP), tumor necrosis factor (TNF)-a and interleukin (IL)-6 in both groups after surgery were higher than those before surgery, but the indicators in the observation group were lower than those in the control group (P<0.05).

Conclusion:

Thoracoscopic surgery can reduce pains of patients, speed up recovery, and reduce incidence of surgical infection in the treatment of thoracic trauma. It is a safe and effective treatment method, which is worth clinical application.

Management of chest trauma

Trauma is the leading cause of death worldwide. Approximately 2/3 of the patients have a chest trauma with varying severity from a simple rib fracture to penetrating injury of the heart or tracheobronchial disruption. Blunt chest trauma is most common with 90% incidence, of which less than 10% require surgical intervention of any kind. Mortality is second highest after head injury, which underlines the importance of initial management. Many of these deaths can be prevented by prompt diagnosis and treatment. What is the role of the thoracic surgeon in the management of chest trauma in severely injured patients? When should the thoracic surgeon be involved? Is there a place for minimal invasive surgery in the management of severely injured patients? With two case reports we would like to demonstrate how the very specific knowledge of thoracic surgeons could help in the care of trauma patients.