The decision for the optimum moment to reoperate requires clinical skill and experience. The trauma surgeon must synthesize observation of the patient with a variety of high-technology laboratory monitoring data (Figure 3). Hypothermia and its consequent coagulopathies must be corrected. However, core temperature alone cannot dictate timing for subsequent surgery. An important current challenge is to find laboratory studies that best indicate timing of subsequent surgery, ie, when benefits of delay, rewarming, and resuscitation no longer exceed the progressive harm caused by damaging factors such as continued bleeding, incompletely closed holes or blind loops of bowel, or ischemic tissue within the peritoneal cavity. The moment is fleeting and difficult to identify. The relation between benefits and detriments of delay is illustrated in Figure 4. Table 2 lists monitoring techniques and laboratory and imaging studies often performed on patients after DCS and before subsequent surgery for definitive repair. Personnel typically required to perform these studies and interpret their results during the interoperative period include trauma surgeons, anesthesiologists, clinical laboratory personnel, blood bank personnel, respiratory therapists, pharmacy and central supply personnel, the operating room nursing team, and the intensive care unit nursing team. An enormous resource commitment is inherent in proper performance of DCS.