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

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

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

NL-OMON

Registry ID

NL-OMON42759

Enrollment

Registered

2015-12-16

Start date

2016-03-04

Completion date

Unknown

Last updated

2024-04-23

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Mid-flexion knee laxity

Interventions

None listed

Eligibility

Age

18 Years to 99 Years

Inclusion criteria

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

Exclusion criteria: * Subject has a hip arthrodesis * Subject has a hip prosthesis * Subject has a BMI >35 * Subject has knee flexion

Design outcomes

Primary

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

Measure

Time frame

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

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Secondary

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

Countries

Netherlands

Outcome results