Document Detail

Measuring the pressure pattern of the joint surface in the uninjured knee.
MedLine Citation:
PMID:  15088995     Owner:  NLM     Status:  MEDLINE    
PURPOSE: Testing an applicable intraoperative system for measuring surface pressure in knee joints, simulating as accurately as possible operating theatre conditions. TYPE OF STUDY: Cadaver study. METHODS: Pressure probes were introduced into the knee joints medially and laterally (K 6900 quad probes) in five cadavers, providing real-time data with computerized data recording (K-scan system, manuf. Tekscan Inc., South Boston, MA). The initial position of the knee was flexed and hanging, as in a leg holder. In simulation of usual operating theatre procedures, the knee was manually extended to 0 degrees and again brought to hanging position. The data are given as relative-pressure values and should serve as the basis for intraoperative use. During arthroscopy, absolute-pressure values would then be influenced by the pressure of the arthroscopy pump. RESULTS: In 90 degrees flexion the average pressure ratio between the medial and lateral joint compartments was initially 1:1.5. When the leg was brought to full extension the pressure in the medial compartment increased, giving a pressure ratio of 1:1 at about 15 degrees and 1.8:1 at full extension. When bringing the leg back again to 90 degrees a similar pressure ratio curve was recorded. CONCLUSIONS: The pressure relationship between the medial and lateral knee compartments could be recorded and was found reproducible in simulated operating-theatre conditions. The measurement of joint surface pressure during implantation of an anterior cruciate ligament graft could provide data for individual intraoperative quality control, thus improving surgical results.
Richard K Kdolsky; Basil Al Arabid; Martin Fuchs; Rudolf Schabus; Vilmos Vécsei
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Publication Detail:
Type:  Comparative Study; Evaluation Studies; In Vitro; Journal Article; Research Support, Non-U.S. Gov't; Validation Studies    
Journal Detail:
Title:  Wiener klinische Wochenschrift     Volume:  116     ISSN:  0043-5325     ISO Abbreviation:  Wien. Klin. Wochenschr.     Publication Date:  2004 Mar 
Date Detail:
Created Date:  2004-04-19     Completed Date:  2004-08-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  21620870R     Medline TA:  Wien Klin Wochenschr     Country:  Austria    
Other Details:
Languages:  eng     Pagination:  196-200     Citation Subset:  IM    
Department of Traumatology, University of Vienna Medical School, Vienna, Austria.
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MeSH Terms
Equipment Design
Equipment Failure Analysis
Knee Joint / physiopathology*,  surgery*
Middle Aged
Monitoring, Intraoperative / instrumentation*
Reconstructive Surgical Procedures / instrumentation*
Reproducibility of Results
Sensitivity and Specificity
Transducers, Pressure*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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