Trends in burn resuscitation: shifting the focus from fluids to adequate endpoint monitoring, edema control, and adjuvant therapies.
Bum shock is a complex process involving a series of intertwined physiologic responses to injury that require more rigorous intervention than simply a change in fluid tonicity, fluid composition, or fluid resuscitation volume. Controversy ensues over monitoring techniques and resuscitation goals, in part because the identification of true markers of perfusion is clouded by intradependence of endpoints on other metabolic processes. The persistence of cellular hypoperfusion in patients who have been deemed adequately resuscitated by global indices supports the growing realization that failure of conventional endpoint-monitoring strategies to detect compensated bum shock can lead to significant organ injury from SIRS or MODS. Current endpoints should be interpreted in the aggregate, because none have yet been demonstrated to reflect tissue perfusion status independently and accurately. Numerous technologically advanced endpoints to predict patient outcome, which may be useful in determining futility of treatment or end-of-life decisions, are now available. Still lack-ing, however, is a reliable tool proven to improve outcome that can guide bum shock resuscitation therapies successfully. Exciting new research in tissue oxygenation and perfusion has revealed that damaging mediator cascades and irreversible microvascular changes may preclude complete resolution of bum shock solely through restoration of oxygen delivery. Because bum patients now frequently survive the early resuscitation phase. the focus should be on controlling derangements in oxygen use and correcting occult hypoperfusion to reduce later adverse patient outcomes from SIRS, sepsis, and MODS. Bum-specific research on resuscitation endpoints and monitoring strategies lags behind research in other patient populations. Present standards and monitoring guidelines for bum shock resuscitation should be critically evaluated and based on true, scientifically validated data rather than on observational studies or personal beliefs. Thus the continuing challenge for clinicians and researchers:burn centers must collaborate to perform large, multi-center studies to evaluate critically and to prove resuscitation endpoints and therapies. Future technologies targeted at microcirculatory perfusion and cellular oxygenation offer an exciting promise for less invasive, easily accessible, more accurate endpoints and treatments for bum shock resuscitation.
Ahrns
Karla S
KS
University of Michigan Trauma Burn Center, 1500 East Medical Center Drive, Room UH1C340, Ann Arbor, MI 48109, USA. kahrns@med.umich.edu
D000005:Abdomen; D002056:Burns / Q000150:complications / Q000175:diagnosis / Q000628:therapy*; D003131:Combined Modality Therapy; D003161:Compartment Syndromes / Q000209:etiology / Q000517:prevention & control; D003422:Critical Care / Q000379:methods / Q000639:trends*; D004487:Edema / Q000209:etiology / Q000517:prevention & control; D019317:Evidence-Based Medicine / Q000592:standards; D005440:Fluid Therapy / Q000379:methods / Q000451:nursing / Q000639:trends; D006440:Hemofiltration / Q000379:methods / Q000639:trends; D006801:Humans; D008991:Monitoring, Physiologic / Q000379:methods / Q000451:nursing / Q000639:trends*; D009102:Multiple Organ Failure / Q000209:etiology / Q000517:prevention & control; D012107:Research Design / Q000592:standards; D012151:Resuscitation / Q000379:methods / Q000451:nursing / Q000639:trends*; D012774:Shock, Traumatic / Q000209:etiology / Q000517:prevention & control