Knee laxity at 0 * , 30 * and 90 * of flexion measured in the normal older healthy knee

Completed

Conditions: Mid-flexion knee laxity
reference values
10023213

Registration Number: NL-OMON42759

Lead Sponsor: Sint Maartenskliniek

Brief Summary: Not available

Detailed Description: Not available

Recruitment & Eligibility

Status: Completed

Sex: Not specified

Target Recruitment: 40

Inclusion Criteria

* Subject is between 50 and 75 years old
* Subject has nog osteoarthritis or rheumatoid arthritis in one or both knees
* Subject has no history of knee injury, especially knee ligament injury
* Subject is living independently (e.g. not in a nursing home)
* Subject is able to walk for at least 1 hour without support (indicating good knee function)

Exclusion Criteria

* Subject has a hip arthrodesis
* Subject has a hip prosthesis
* Subject has a BMI >35
* Subject has knee flexion <90 *
* Subject has ligament problems or varus or valgus leg
* Subject has low bone density
* Subject lives further than 50 km from the Sint Maartenskliniek

Study & Design

Study Type: Observational invasive

Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
<p>The main outcome parameter is varus and valgus laxity of the knee at 0 , 30 <br /><br>and 90 * flexion. For varus and valgus flexion a custom made stress device will<br /><br>be used to stress the knee. With this device the subject lay supine with<br /><br>his/her lower leg on a plateau with the knee flexed in 0 , 30 and 90 . With<br /><br>the use of a 5 kilogram weight at 30 cm from the joint line and a pulley a<br /><br>moment of 15 Nm will be applied at the knee joint. The knee will stressed<br /><br>medially and laterally. For each subject, nine roentgenograms (three in 0 ,<br /><br>three in 30 * and three in 90 *) will be taken with medial, lateral and no<br /><br>stress applied, under fluoroscopic guidance with the roentgen ray direction<br /><br>parallel to the tibia joint surface. </p><br>

Secondary Outcome Measures

Name	Time	Method
<p>* Demographic data<br /><br>* Patient reported outcome score: Tegner activity score<br /><br>* Clinician reported outcome score:<br /><br>* - Knee Society Score assessed as defined by<br /><br>Insall<br /><br>* - Anterior and posterior translation of the tibia was<br /><br>measured in 20 , 30 and 90 * flexion using the Rolimeter.<br /><br><br /><br>* Functional outcome:<br /><br>* Knee power output measured with the Leg Extensor Power Rig </p><br>