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Osteosynthesis and Trauma Care 2005; 13(3): 178-182
DOI: 10.1055/s-2005-836625
Original Article

© Georg Thieme Verlag Stuttgart · New York

Changes of Knee Joint Pressure Pattern after Preloading an Augmentation Device

R. K. Kdolsky1 , B. Al-Arabid1 , V. Vécsei1
  • 1Department of Traumatology, Medical University of Vienna, Austria
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Publication History

Publication Date:
23 August 2005 (online)

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Abstract

Rupture of the anterior cruciate ligament leads to changes in normal knee pressure patterns. Reports on in-situ repair of the ligament under preloading by using synthetic augmentation devices have shown a high incidence of knee effusion and stiffness. However, the reason for this adverse outcome was not explored completely. We hypothesise that preloading is the main factor affecting outcome on in-situ anterior cruciate ligament reconstruction. A pressure gauge was simultaneously applied into the medial and lateral knee joint compartments of six cadaveric knees. The knees were mounted imitating the intraoperative position. Three series of measurements were obtained. Joint pressures were registered during a flexion-extension cycle to be used as control (I). The anterior cruciate ligament was then resected and the measurements were repeated (II). A third measurement was obtained after the repair of the ligament with an unloaded augmentation device (III). The data on the reconstructed ligament under no preloading specimens were similar to the data on the intact specimens. As more preloading was applied for the reconstruction the more was the difference on pressure patterns when compared to the intact specimens. Preloading deteriorates the capacity to restore normal joint pressure patterns. By using a pressure gauge during in-situ reconstruction of the anterior cruciate ligament, normal pressure patterns can be restored in a reliable and consistent fashion.

Key words

anterior cruciate ligament - acute rupture - restoration of original pressure relation - on-line data acquisition - effusion rate

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Ass. Prof. Dr. R. K. Kdolsky

Department of Traumatology · University of Vienna Medical School · AKH

Währinger Gürtel 18-20

1090 Vienna

Austria

Phone: +43/1/4 04 00 56 19

Fax: +43/1/4 04 00 59 39

Email: richard.kdolsky@meduniwien.ac.at

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