Prolonged Epidural Infusion Improves Functional Outcomes Following Knee Arthroscopy in Patients with Arthrofibrosis after Total Knee Arthroplasty: A Retrospective Evaluation

Abstract

A total of 20 consecutive patients with knee stiffness post total knee arthroplasty (TKA) underwent arthroscopic lysis of adhesions and manipulation plus indwelling epidural were evaluated retrospectively. Epidural catheters were placed preoperatively for an intended 6 weeks of postoperative analgesia to facilitate intensive physical therapy. The mean loss of knee extension immediately before incision was 13.5 ± 9.1 degrees (range, 0–35 degrees) and flexion was 77.65 ± 19.2 degrees (range, 45–125 degrees). At the 6-week and final (mean, 0.47 years) follow-up, the loss of extension was 1.5 ± 5.1 degrees (range, −10 to +7 degrees) and 5.4 ± 4.7 degrees (range, 0–15 degrees), respectively, and flexion was 99.7 ± 12.3 degrees (range, 75–120 degrees) and 98.5 ± 16.1 degrees (range, 75–130 degrees), respectively. Of the 20 patients, 2 missed their 6-week clinic visit. Improvements in motion immediately preoperative to 6-week and final follow-up were each significant (p < 0.01). At examination 6 weeks postoperatively, 94.4% of patients met the definition for clinical motion success and 70% maintained success at final follow-up. Visual analog scale improved significantly from 5.4 to 2.0 (p < 0.01) at 6 weeks postoperative in the 12 patients with this data recorded. On the basis of this data, use of tunneled epidurals with arthroscopic lysis of adhesions for arthrofibrosis after TKA is correlated with a high likelihood of functional success postoperatively as measured by range of motion improvement.

Keywords

arthrofibrosis - lysis of adhesions - tunneled epidural - indwelling epidural catheter - total knee arthroplasty

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