Predictability of the Ability to Perform an Emergency Stop With Disorders of the Hip

Study Overview
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Brief Summary
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Several studies exist on patient performance in drive simulators especially around and after surgery. Recommendations concerning the ability to drive preoperatively are based on these studies, which generated their data using drive simulators. However, in all the datasets driving performance remains highly individual. Since a drive simulator is not readily available in normal general practitioner surgeries it would be helpful to have convenient clinical tests to evaluate a patients individual ability to perform an emergency stop. This study aims at evaluating different possibilities how such performance might be predicted. Patients with hip osteoarthritis and patients who have received total hip arthroplasty are tested clinically and their results are compared with the gold standard experiment - a drive simulator.

Official Title
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Predictability of Braking Performance in Patients With Degenerative Disease of the Hip Joint or With Total Hip Arthroplasty

Conditions
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Osteoarthritis, Total Hip Arthroplasty

Intervention / Treatment
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* Other: Braking and functionality


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 18-85 y valid driving license male and female Hip Osteoarthritis, Total hip arthroplasty capability to walk with or without a walking stick Exclusion Criteria: myocardial infarction/Apoplexia < 6 months Total hip arthroplasty <5 weeks New York Heart Association 3/4 lacking drivers' license peripheric sensomotor deficit <3/5 British Medical Research Council new fracture of the lower extremity or spine systemic or metastasised Cancer drug intake with centrally acting substances known to affect reaction time (Opioids, e.g. Tramadol, oxycodone, morphine, Til

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 85 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Braking and functionality with hip osteoarthritis<br>Cohort testing of driving performance in a drive simulator and correlation with clinical functionality in patients with hip osteoarthritis | Other: Braking and functionality<br> <br> |
| Experimental: Braking and functionality with hip arthroplasty<br>Cohort testing of driving performance in a drive simulator and correlation with clinical functionality in patients with total hip arthroplasty | Other: Braking and functionality<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Correlation of an index of manual reaction time combined with functional hip tests and braking performance | Evaluation of degree of correlation of braking performance (total brake response time) and clinical testing of hip functionality in patients with hip osteoarthritis or total hip arthroplasty. The measure is a composite measure of multiple different tests. If a sufficient correlation between the composite measure and braking performance is observed a regression model will be developed. One time point of evaluation for each participant. | Osteoarthritis group: cross sectional at consultation, Total hip arthroplasty group: cross-sectional - from 5 weeks postoperatively until 400 months postoperatively, at consultation |