Rotational bed therapy after blunt chest trauma: a nationwide online-survey on current concepts of care in Germany

Rotational therapy in thoracic injuries: what is the evidence?

PURPOSE OF REVIEW

To review the current use of continuous lateral rotational therapy (CLRT) in patients with thoracic injuries and its impact on clinical course, complications and outcome.

RECENT FINDINGS

Patient positioning is a key factor in the treatment of severe thoracic injuries and CLRT, and intermittent supine and prone position are basic options. There is a lack of randomized controlled studies for trauma patients with chest injury undergoing kinetic therapy as standard of care. A positive effect of kinetic therapy for prevention of secondary respiratory complications has been reported; nevertheless, no positive effect on mortality or length of hospital stay could be affirmed so far. In general, standardized therapeutic regimes for treatment of chest trauma have been implemented, including ventilator settings and positioning therapy. However, the available data do not allow a clear recommendation for rotational/kinetic therapy or prone positioning as superior or inferior.

SUMMARY

The benefit of changing the patients' position for secret mobilization and recruitment of atelectasis after chest trauma and therefore preventing secondary complications seems to be self-evident. Since only few studies report about the utility of CLRT in critically ill chest trauma patients, randomized controlled multicenter trials are necessary to analyze the overall benefit of such means.

Leukotriene B4 indicates lung injury and on-going inflammatory changes after severe trauma in a porcine long-term model

BACKGROUND

Recognizing patients at risk for pulmonary complications (PC) is of high clinical relevance. Migration of polymorphonuclear leukocytes (PMN) to inflammatory sites plays an important role in PC, and is tightly regulated by specific chemokines including interleukin (IL)-8 and other mediators such as leukotriene (LT)B4. Previously, we have reported that LTB4 indicated early patients at risk for PC after trauma. Here, the relevance of LTB4 to indicating lung integrity in a newly established long-term porcine severe trauma model (polytrauma, PT) was explored.

METHODS

Twelve pigs (3 months old, 30 ± 5kg) underwent PT including standardized femur fracture, lung contusion, liver laceration, hemorrhagic shock, subsequent resuscitation and surgical fracture fixation. Six animals served as controls (sham). After 72h lung damage and inflammatory changes were assessed. LTB4 was determined in plasma before the experiment, immediately after trauma, and after 2, 4, 24 or 72h. Bronchoalveolar lavage (BAL)-fluid was collected prior and after the experiment.

RESULTS

Lung injury, local gene expression of IL-8, IL-1β, IL-10, IL-18 and PMN-infiltration into lungs increased significantly in PT compared with sham. Systemic LTB4 increased markedly in both groups 4h after trauma. Compared with declined plasma LTB4 levels in sham, LTB4 increased further in PT after 72h. Similar increase was observed in BAL-fluid after PT.

CONCLUSIONS

In a severe trauma model, sustained changes in terms of lung injury and inflammation are determined at day 3 post-trauma. Specifically, increased LTB4 in this porcine long-term model indicated a rapid inflammatory alteration both locally and systemically. The results support the concept of LTB4 as a biomarker for PC after severe trauma and lung contusion.

Role of biomarkers in acute traumatic lung injury

In severely injured patients severe thoracic trauma is common and can significantly influence the outcome of these critically ill patients by increased rates of mainly pulmonary complications. Furthermore, patients who sustained thoracic trauma are at increased risk for Acute Lung Injury (ALI) or Adult Respiratory Distress Syndrome (ARDS). Therapeutic options are limited, basically consisting of prophylactic antibiotic therapy and changing patient's positions. It is known, that ALI and ARDS differ clinically and pathobiologically from ALI/ARDS caused by other reasons, but the exact pathology remains elusive. Due to that no reliable predictive or surveillance biomarkers could be established for clinical diagnosis and identification of patients at high risk for acute traumatic lung injury. Nevertheless, there are plenty of promising markers that need to be further elucidated in larger case numbers and multicenter studies. This article sums up the recent status of those promising clinical biomarkers.

Ethyl pyruvate reduces acute lung damage following trauma and hemorrhagic shock via inhibition of NF-κB and HMGB1

OBJECTIVE

After blunt thoracic trauma (TxT) and hemorrhagic shock with resuscitation (H/R) intense local inflammatory response and cell loss frequently impair the pulmonary function. Ethyl pyruvate (EP) has been reported to improve the pathophysiologic derangements in models of acute inflammation. Here, we studied the effects of EP on inflammation and lung damage after TxT+H/R.

METHODS

Twenty four female Lewis rats (180-240g) were randomly divided into 3 groups: two groups underwent TxT followed by hemorrhagic shock (35±3mmHg) for 60min and resuscitation with either Ringers-Lactat (RL) alone or RL supplemented with EP (EP, 50mg/kg). Sham operated animals underwent surgical procedures. Two hours later bronchoalveolar lavage fluid (BAL), lung tissue and blood were collected for analyses.

RESULTS

EP significantly improved pO₂ levels compared to RL after TxT+H/R. TxT+H/R induced elevated levels of lactate dehydrogenase, total protein concentration in BAL and lung damage as evidenced by lung histology; these effects were significantly reduced by EP. Local inflammatory markers, lung TNF-alpha protein levels and infiltration with polymorphonuclear leukocytes (PMNL) significantly decreased in EP vs. RL group after TxT+H/R. Indicators of apoptosis as reduced BCL-2 and increased FAS gene expression after TxT+H/R were significantly increased or decreased, respectively, by EP after TxT+H/R. EP reduced TxT+H/R-induced p65 phosphorylation, which was concomitant with reduced HMGB1 levels in lung sections.

CONCLUSIONS

Taken together, TxT+H/R induced strong inflammatory response and apoptotic changes as well as lung injury which were markedly diminished by EP. Our results suggest that this might be mediated via NF-κB and/or HMGB1 dependent mechanism.

Video-assisted thoracoscopic surgery for retained hemothorax in blunt chest trauma

Purpose of review

In the last decade, video-assisted thoracoscopic surgery (VATS) has become a popular method in diagnosis and treatment of acute chest injuries. Except for patients with unstable vital signs who require larger surgical incisions to check bleeding, this endoscopic surgery could be employed in the majority of thoracic injury patients with stable vital signs.

Recent findings

In the past, VATS was used to evacuate traumatic-retained hemothorax. Recent study has revealed further that lung repair during VATS could decrease complications after trauma. Management of fractured ribs could also be assisted by VATS. Early VATS intervention within 7 days after injury can decrease the rate of posttraumatic infection and length of hospital stay. In studies of the pathophysiology of animal models, N-acetylcysteine and methylene blue were used in animals with blunt chest trauma and found to improve clinical outcomes.

Summary

Retained hemothorax derived from blunt chest trauma should be managed carefully and rapidly. Early VATS intervention is a well tolerated and reliable procedure that can be applied to manage this complication cost effectively.

[Why nurses fly and surgeons rotate. The surgical study network CHIR-Net]

BACKGROUND

The German National Surgical Trial Network (CHIR-Net) which has been funded since 2006 by the Federal Ministry of Education and Research (BMBF, funding code 01GH1001A-01GH1001F, 01GH0702) is made up of eight regional surgical centers. The aim of the CHIR-Net is the design, implementation and publication of prospective, randomized, multicenter trials to support evidence-based medicine in surgery. Two main pillars of the CHIR-Net are the surgeon on rotation program and the flying study nurse program. With these two programs the surgical hospitals are supported in their trial working by educating competent investigators and the infrastructural support of flexible and mobile study nurses.

METHODS

The surgeon on rotation program and the concept of the flying study nurse are presented descriptively. Furthermore, this paper provides reports of experiences of a surgeon on rotation and a flying study nurse of the CHIR-Net. Additionally, the results of an on-line evaluation of the regional surgical hospitals (belonging to the regional surgical center of the universities Witten/Herdecke and Cologne) regarding the needs and requirements of the regional surgical hospitals are presented.

RESULTS

The surgeon on rotation program of the CHIR-Net offers investigators the possibility to acquire the basics of designing, developing and implementation of high quality clinical trials. In addition, their own study projects could be intensively driven forward. The flying study nurse program enables in particular non-university surgical hospitals to be supported competitively in performing their own study projects and participating in muliticenter clinical trials. The success of these two programs has been confirmed by the conducted evaluations and the presented field reports.

CONCLUSION

The CHIR-Net is able to develop a high quality study culture in Germany with its surgeon on rotation and flying study nurse program. In addition to the funding period by the BMBF, the continuance of the CHIR-Net should be a primary aim of further measures.