b'Scientific Session Abstracts SATURDAY APRIL 20, 2024 6: READMISSIONS RATES AFTER INDEX VASCULAR PROCEDURES IN A QUATERNARYMEDICAL CENTEREileen Lu, Donna Bahroloomi, Lili Sadri, Donald Baril, Elizabeth Chou,Navyash Gupta, Cassra Arbabi, Ali AzizzadehDivision of Vascular Surgery, Cedars-Sinai Medical Center, Los Angeles, CABackground: Vascular patients represent a comorbid population who are at high risk for readmissions due to their ongoing medical comorbidities. Readmissions correlate with poor patient outcomes and are associated with significant health care costs. The objective of this studywas to characterize readmissions after index vascular procedures to identify interventions to reduce preventable readmissions.Method: We conducted a retrospective review of readmissions after index vascular procedures using Vizient data at a single quaternary medical center from 6/1/2020-6/30/2023. Diagnosis categories included peripheral arterial disease (PAD), end stage renal disease (ESRD), carotid, aortic, and venous disease.Results: We identified 170 readmissions following index procedures by vascular surgery (106, 77%) interventional radiology (23, 17%), interventional cardiology (8, 6%) and general surgery (1, 1%). Among the readmissions, 32(19%) were misclassified: 13 (7%) did not undergo a vascular intervention and 19(11%) presented with planned readmissions for intervention. There were 57(41%) PAD, 43(13%) ESRD, 12(9%) carotid, 7(5%) venous, 10(7%) aortic and 9(7%) miscellaneous procedures that required readmission. Of the PAD readmissions, 49(86%) were after emergent index procedures with an average time to readmission of 12.4 days. Most readmissions were related to medical comorbidities 27(47%) followed by worsening foot wounds 15(26%) and surgical wound complications 7(12%). Among patients with ESRD, 37(86%) of the readmissions were after emergent index cases with an average time to readmission of 14.3 days. Unsurprisingly, most readmissions were related to medical comorbidities 23(54%) and access thrombosis 13(30%). Of the carotid readmissions, 5(42%) were after emergent index cases with an average time to readmission of 9.9 days. The cause of readmission was medical comorbidities 6(50%), other 5(42%), and surgical wound complications 2(17%). The majority, 5(71%) of venous readmissions were after emergent index cases with an average time to readmission of 12.6 days. Readmissions were related to medical comorbidities 4(57%), other 2(29%), and surgical wound complication 1(14%). Of the aortic readmissions, only 3(30%) were after emergent index procedures with an average time to readmission of 13.9 days. Most common cause of readmission was medical comorbidities 7(70%).Conclusion: ESRD and PAD patients represent a high-risk population for readmission after emergent index procedures. Most readmissions were related to medical comorbidities or worsening wound complications. This underscores the importance of coordinating early follow-up with primary care providers, nephrologists, and podiatrists for prompt identification of preventable post- discharge complications. Efforts are needed to improve the accurate identification of planned readmissions and vascular procedures to provide a precise assessment of readmissions following vascular interventions.42 NDANNUAL MEETING|APRIL 1921, 2024|OCEANSIDE, CA 45'