One High-Volume Posteromedial Knee Capsular Injection Can Provide Safe Anesthetic Infiltration Across the Entire Posterior Knee Capsule.

ABSTRACT:

Background

Anesthetic injection through the central or posterolateral knee capsule for analgesia after knee surgery risks popliteal vessel and tibial and peroneal nerve injury. We evaluated the distribution of a high volume of fluid injected through only the posteromedial capsule and compared it to a technique involving injections through the posteromedial and posterolateral capsules.

Methods

Four fresh cadaveric knees were injected with 50 ml of Omnipaque 350 diluted 1:4 with normal saline through the posteromedial knee capsule. In four other specimens, we followed a published protocol by injecting 12.5 ml posteromedially and 12.5 ml posterolaterally. The knees were then ranged 20 times over 20 minutes before obtaining a computed tomography scan to evaluate the spread of in

SUBMITTER: Atzmon R 

PROVIDER: S-EPMC11932871 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature