Acute Perioperative Comparison of Patient-Specific Instrumentation versus Conventional Instrumentation Utilization during Bilateral Total Knee Arthroplasty

Utilizing patient-speci1c instrumentation during total knee arthroplasty has gained popularity in recent years with theoretical advantages in blood loss, intraoperative time, length of stay, postoperative alignment, and functional outcome, amongst others. No study has compared acute perioperative measures between patient-speci1c instrumentation and conventional instrumentation in the bilateral total knee arthroplasty setting. We compared patient-speci1c instrumentation versus conventional instrumentation in the setting of bilateral total knee arthroplasty to determine any bene1ts in the immediate perioperative period including surgical time, blood loss, pain medication use, length of stay, and discharge disposition. A total of 49 patients with standard instrumentation and 31 patients with patient-speci1c instrumentation were retrospectively reviewed in a two-year period at one facility. At baseline, the groups were comparable with respect to age, ASA, BMI, and comorbid conditions. We analyzed data on operative time, blood loss, hemoglobin change, need for transfusion, pain medication use, length of stay, and discharge disposition. there was no statistically signi1cant di:erence between groups in regards to these parameters. Patient-speci1c instrumentation in the setting of bilateral total knee arthroplasty did not provide any immediate perioperative bene1t compared to conventional instrumentation.