Ligament Tension Measurement in Knee Arthroplasty

Study Overview
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Brief Summary
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To develop a new type of knee joint pressure detection device and demonstrate its feasibility To analyze individual differences of knee ligament tension using the new device and explore the influencing factors of ligament tension To explore the correlation between knee ligament tension and postoperative knee function

Official Title
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Ligament Tension Measurement in Knee Arthroplasty

Conditions
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Knee Arthropathy

Intervention / Treatment
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* Device: A gap plate with the function of knee joint pressure detection


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients receiving primary knee arthroplasty Exclusion Criteria: Patients having had a surgery history of the ipsilateral knee

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 90 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Ligament tension measurement group<br>All participants will receive ligament tension measurement by the tension device during operation | Device: A gap plate with the function of knee joint pressure detection<br>* A gap plate can measure knee joint pressure by tension sensor. This is a part of routine medical care.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Ligament tension | Measure the medial and lateral ligament tension of the operative knee at different flexion angle | During operation | 
| Pre-operative knee function | Assess the knee function using AKS (The American knee society, 0 200, higher scores mean a better outcome) scale before operation | 1day before operation | 
| Post-operative knee function | Assess the knee function using AKS scale at the 3rd day post-operation | The 3rd day after operation | 
| Post-operative knee function | Assess the knee function using AKS scale at the 6th week post-operation | The 6th week after operation | 
| Post-operative knee function | Assess the knee function using AKS scale at the 3rd month post-operation | The 3rd month after operation | 
| Post-operative knee function | Assess the knee function using AKS scale at the 12th month post-operation | The 12th month after operation | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Pre-operative infection test | Include C-reactive protein (CRP) | 1day before operation | 
| Pre-operative infection test | Include Erythrocyte Sedimentation Rate (ESR) | 1day before operation | 
| Pre-operative infection test | Include white blood cell | 1day before operation | 
| Post-operative infection test | Include CRP | The 1st day after operation | 
| Post-operative infection test | Include ESR | The 1st day after operation | 
| Post-operative infection test | Include white blood cell | The 1st day after operation | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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ligament tension, knee arthroplasty