Rupture of the knee capsule from articular hyperpressure. Experiments in cadaver knees

Acta Orthopaedica Scandinavica
P BurgaardG Kristensen

Abstract

We used 10 cadaver knees to estimate the safe pressure during arthroscopy by measuring the volumes and pressures of irrigation fluid at different flexion angles. Maximum volumes could be contained at 35 degrees of flexion. Pressures of 200 to 450 mmHg were measured, and all the knees ruptured by extension or flexion after they were filled to 100 mmHg at 35 degrees of flexion. Fifty milliliters of irrigation fluid had to be removed if the pressure remained constant when extending from 35 degrees and 70 ml when flexing to 90 degrees. Totally, 100 ml irrigation fluid had to be removed when flexing from 35 degrees to 120 degrees. Our investigation indicates that a pressure of 150 mmHg can be tolerated by all knees. Both flexion and extension from the 35 degrees position must be done gently and slowly using a large bore, wide-open inflow and outflow tubes allowing egress of irrigation fluid to prevent capsular rupture, extravasation of irrigation fluid, vascular compromise, or compartment syndrome.

References

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Citations

Sep 20, 2005·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Hasan TatariAlp Ergör
Dec 17, 1998·Acta Orthopaedica Scandinavica·A Sperber, T Wredmark
Apr 3, 2014·Veterinary Surgery : VS·Jennifer J WarnockJason E Wiest
Apr 1, 1996·Arthroscopy : the Journal of Arthroscopic & Related Surgery : Official Publication of the Arthroscopy Association of North America and the International Arthroscopy Association·E F Ekman, G G Poehling
Jan 1, 1989·Arthroscopy : the Journal of Arthroscopic & Related Surgery : Official Publication of the Arthroscopy Association of North America and the International Arthroscopy Association·K L Boll, U Merrild
May 3, 2016·Orthopedics·Mark S HsiaoJoshua P Herzog
May 26, 1999·Journal of Orthopaedic Trauma·J Hyman, T Moore
Mar 22, 2013·Journal of Orthopaedic Trauma·Matthew McElvanyDarin Friess

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