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Abstract
BackgroundAlthough abbreviated surgery with planned reoperation (damage control surgery) is now widely used to manage major trauma patients, the procedure and its component interventions have not been evaluated in randomized controlled trials (RCTs). While some have suggested the need for such trials, they are unlikely to be conducted because of patient safety concerns. As animal studies may overcome several of the limitations of existing observational damage control studies, the primary objective of this study is to evaluate the efficacy and safety of damage control versus definitive surgery in experimental animal models of injury.Methods/designWe will search electronic databases (Medline, Embase, PubMed, Web of Science, Scopus, and the Cochrane Library), conference abstracts, personal files, and bibliographies of included articles. We will include RCTs and prospective cohort studies that utilized an animal model of injury and compared damage control surgery (or specific damage control interventions or adjuncts) to definitive surgery (or specific definitive surgical interventions). Two investigators will independently evaluate the internal and external/construct validity of individual studies. The primary outcome will be all-cause mortality. Secondary outcomes will include blood loss amounts; blood pressures and heart rates; urinary outputs; core body temperatures; arterial lactate, pH, and base deficit/excess values; prothrombin and partial thromboplastin times; international normalized ratios; and thromboelastography (TEG) results/activated clotting times. We will calculate summary relative risks (RRs) of mortality and mean differences (for continuous outcomes) using DerSimonian and Laird random effects models. Heterogeneity will be explored using subgroup meta-analysis and meta-regression. We will assess for publication bias using funnel plots and Begg’s and Egger’s tests. When evidence of publication bias exists, we will use the Duval and Tweedie trim and fill method to estimate the potential influence of this bias on pooled summary estimates.DiscussionThis study will evaluate the efficacy and safety of damage control in experimental animal models of injury. Study results will be used to guide future clinical evaluations of damage control surgery, determine which animal study outcomes may potentially be generalizable to the clinical setting, and to provide guidelines to strengthen the conduct and relevance of future pre-clinical studies.
Highlights
Abbreviated surgery with planned reoperation is widely used to manage major trauma patients, the procedure and its component interventions have not been evaluated in randomized controlled trials (RCTs)
Study results will be used to guide future clinical evaluations of damage control surgery, determine which animal study outcomes may potentially be generalizable to the clinical setting, and to provide guidelines to strengthen the conduct and relevance of future pre-clinical studies
The conventional surgical approach to managing traumatic hemorrhage is to definitively repair all injured organs in one operation [7]. As these repairs often require a significant amount of time, ongoing blood loss during surgery frequently leads to an inadequate blood supply to peripheral tissues resulting in anaerobic metabolism, lactic acidosis, and a decline in core body temperature [8,9]
Summary
Abbreviated surgery with planned reoperation (damage control surgery) is widely used to manage major trauma patients, the procedure and its component interventions have not been evaluated in randomized controlled trials (RCTs). The conventional surgical approach to managing traumatic hemorrhage is to definitively repair all injured organs in one operation [7]. As these repairs often require a significant amount of time, ongoing blood loss during surgery frequently leads to an inadequate blood supply to peripheral tissues resulting in anaerobic metabolism, lactic acidosis (low blood pH due to an accumulation of arterial lactate), and a decline in core body temperature [8,9]. Replacement of blood losses with crystalloid solutions devoid of clotting factors and platelets often produces or worsens coagulopathy (i.e., abnormal blood clotting), which manifests as an absence of visible blood clots during surgery and/or abnormal clotting test results [7,8,9]
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