SESSION TITLE: Cardiothoracic Surgery SESSION TYPE: Original Investigation Posters PRESENTED ON: 10/10/2018 01:00 PM - 02:00 PM PURPOSE: Coronary Artery Bypass Grafting (CABG) may be associated with a postoperative systemic inflammatory response syndrome, increased vascular capacitance, third-space fluid shifts, and high preload requirements, thus mandating zealous fluid resuscitation. These effects may be somewhat mitigated by avoiding the use of extra-corporeal circulation during the procedure, completing the operation off-pump. Indeed, over-aggressive fluid management in patients undergoing off-pump coronary artery bypass (OPCAB) can have adverse impacts upon ventilation requirements, gas-exchange, transfusion needs, and also effect length of stay and overall morbidity. There is a paucity of data regarding the optimal type of fluids to utilize postoperatively specifically in patients who have OPCAB surgery. We sought to analyze perioperative outcomes in patients who had primary OPCAB surgery, comparing those individuals who received colloids vs. those who were given crystalloid fluids for postoperative resuscitation. METHODS: A comprehensive retrospective review was undertaken of all patients who underwent first-time OPCAB surgery at our institution between 2012 and 2016. Of these, 50 cases were selected at random, 25 of whom received albumin (colloid) as their fluid resuscitation postoperatively, as compared with the remaining 25 patients, all of whom were given crystalloid. The type of fluid that was administered at the time to any given patient was at the discretion of the treating physician. Perioperative outcomes were analyzed using linear & logistic regression, where appropriate. RESULTS: Both patient groups were well-matched for all demographic factors. The albumin cohort had significantly longer ICU and overall lengths of stay (p = 0.007, p = 0.01, respectively). The albumin group demonstrated a greater degree of (temporary) worsening of renal function than did those patients who received crystalloid (p = 0.0036). The crystalloid group required greater total volume of fluid resuscitation than did the colloid group (p < 0.0001). There was no difference between patient groups with respect to vasopressor requirements, ventilation times, perioperative bleeding, or need for transfusion. CONCLUSIONS: Crystalloids after OPCAB surgery are at least as effective as colloids for postoperative resuscitation, and may be associated with better preservation of renal function, and with shorter lengths of stay, concomitantly reducing overall cost and resource utilization. CLINICAL IMPLICATIONS: Crystalloids after OPCAB surgery are at least as effective as colloids for postoperative resuscitation, and may be associated with better preservation of renal function, and with shorter lengths of stay, concomitantly reducing overall cost and resource utilization. DISCLOSURES: No relevant relationships by Jessica Nino, source=Web Response No relevant relationships by Kush Dholakia, source=Web Response No relevant relationships by Jonathan Hemli, source=Web Response No relevant relationships by Crystal Kyaw, source=Web Response No relevant relationships by Efstathia Mihelis, source=Web Response Owner/Founder relationship with Hearth Repair Technology Please note: $1-$1000 Added 02/13/2018 by Nirav Patel, source=Web Response, value=Ownership interest No relevant relationships by Samuel Scheinerman, source=Web Response