THA Kinematics and Sound for Subjects for Normal, Diseased and Implanted Hips

Study Overview
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Brief Summary
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The objective of this study is to analyze subjects having a normal hip and compare the in vivo kinematics to subjects requiring a total hip arthroplasty (THA) due to having a diseased hip and then later post-operative to their implanted hip. Ten subjects will have a normal hip, ten hips will be diseased, requiring a THA and then those ten diseased hips will be re-analyzed at least six months post-operatively after implantation of a THA.

Official Title
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In Vivo Determination of Total Hip Arthroplasty (THA) Kinematics and Sound for Subjects for Normal, Diseased and Implanted Hips

Conditions
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Hip Injuries

Intervention / Treatment
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* Device: DePuy Synthes total hip arthroplasty
* Radiation: Computer tomography
* Radiation: Fluoroscopy surveillance


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria for diseased/implanted subjects: Subjects will require a THA and will be implanted with either Summit/Pinnacle THA or Corail/Pinnacle THA. Patients must be at least six months post-operative with no other surgical procedures conducted within the past six months that will prohibit them from performing the study activities. Patients must be between 40-85 years of age. Potential subjects will have a body weight of less than 250 lbs. Participants must have Body Mass Index (BMI) of less than 38. Potential subjects' THAs should be judged clinically successful with a HHS >90. Subjects must have demonstrated no evidence of post-operative hip subluxation or dislocation. Subjects must not walk with a detectable limp and must be able to actively abduct their operated hip against gravity without difficulty. Participants must be able to walk on level ground, ascend and descend a ramp and rise from a chair without assistance. Patients from the physician's list who do not meet the study requirements will not be considered. Patients must be willing to sign the Informed Consent (IC)/HIPAA form to participate in the study. Exclusion Criteria for diseased/implanted subjects: Pregnant, potentially pregnant or lactating females. To satisfy radiation protocol, each female subject will be asked if she is pregnant, or possibly could be pregnant. A pregnant person will not be allowed to participate in the study. Subjects without one of the two types of required hip implants. Subjects who have had surgery within the past 6 months that would prohibit them from performing level walking, ascend and descend a ramp and rise from a chair without aid or support of any kind. Subjects who are unable to perform level walking, ascend and descend a ramp and rise from a chair without aid or support. Subjects with pain, functional deficits, or generalized inflammatory. Subjects who walk with a detectable limp. Subjects who cannot actively abduct their operated hip against gravity without difficulty. Subjects who are unwilling to sign IC/HIPAA document. Subjects who have a HHS <90. Inclusion Criteria for normal subjects: Patients must not have any kind of hip implant. Subjects must not have had any type of hip surgery or any pathological hip conditions, including osteoarthritis, or hip pain. Patients must be between the ages of 18 and 65. Potential subjects will have a body weight of less than 250 lbs. Participants must have BMI of less than 38. Pregnant or potentially pregnant females will be excluded from the study. To satisfy radiation protocol, each female subject will be asked if she is pregnant, or possibly could be pregnant. A pregnant person will not be allowed to participate in the study. Participants must be able to walk on level ground, ascend and descend a ramp and rise from a chair without aid of any kind or have had any kind of surgical procedure within the past 6 months that would affect his/her ability to perform the study activities. Patients must be willing to sign the IC and HIPAA forms to participate in the study. Patients must be between 160cm (5'3) and 193cm (6'4) tall Exclusion Criteria for normal subjects: Pregnant, potentially pregnant or lactating females. To satisfy radiation protocol, each female subject will be asked if she is pregnant, or possibly could be pregnant. A pregnant person will not be allowed to participate in the study Subjects with any kind of hip implant. Subjects who have had any past hip surgery, have pathological hip conditions and/or hip pain. Subjects who have had surgery within the past 6 months that would prohibit them from performing level walking, ascend and descend a ramp and rise from a chair without aid or support of any kind. Subjects who are unable to perform level walking, ascend and descend a ramp and rise from a chair without aid or support. Subjects who are unwilling to sign IC/HIPAA document.

Ages Eligible for Study
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Minimum Age: 40 Years
Maximum Age: 85 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 |
| --- | --- |
| Diseased Hip<br>Subjects will have a diseased hip which requires replacement, which will be implanted with either DePuy Synthes Summit/Pinnacle total hip arthroplasty (THA) or the Corail/Pinnacle THA. | Radiation: Computer tomography<br>* Computer tomography (CT) scan of the hip for creation of bone models.<br>Radiation: Fluoroscopy surveillance<br>* Fluoroscopy evaluation of the hip during gait (level walking), chair rise, and ramp ascent and descent activities. Sound/vibration data will be collected simultaneously via non-invasive sensors attached to the hip joint.<br>|
| Normal Hip<br>Subjects will have a normal hip. | Radiation: Computer tomography<br>* Computer tomography (CT) scan of the hip for creation of bone models.<br>Radiation: Fluoroscopy surveillance<br>* Fluoroscopy evaluation of the hip during gait (level walking), chair rise, and ramp ascent and descent activities. Sound/vibration data will be collected simultaneously via non-invasive sensors attached to the hip joint.<br>|
| Implanted Group<br>All subjects from the Diseased Hip group were implanted with either DePuy Synthes Summit/Pinnacle total hip arthroplasty (THA) or the Corail/Pinnacle THA | Device: DePuy Synthes total hip arthroplasty<br> <br> * Other names: DePuy Synthes Corail/Pinnacle THA;Radiation: Fluoroscopy surveillance<br>* Fluoroscopy evaluation of the hip during gait (level walking), chair rise, and ramp ascent and descent activities. Sound/vibration data will be collected simultaneously via non-invasive sensors attached to the hip joint.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Magnitude of Hip Separation During Primary Heel Strike | Negative values indicate hip compression, position values indicate hip separation. All Diseased Hip subjects were re-analyzed approximately 2 years postoperatively to yield the Implanted Hip group. | Approximately 2 years postoperatively. | 
| Magnitude of Hip Separation During Contra-lateral Toe Off | Negative values indicate hip compression, position values indicate hip separation. All Diseased Hip subjects were re-analyzed approximately 2 years postoperatively to yield the Implanted Hip group. | Approximately 2 years postoperatively. | 
| Magnitude of Hip Separation During Contra-lateral Heel Strike | Negative values indicate hip compression, position values indicate hip separation. All Diseased Hip subjects were re-analyzed approximately 2 years postoperatively to yield the Implanted Hip group. | Approximately 2 years postoperatively. | 
| Magnitude of Hip Separation During Primary Toe Off | Negative values indicate hip compression, position values indicate hip separation. All Diseased Hip subjects were re-analyzed approximately 2 years postoperatively to yield the Implanted Hip group. | Approximately 2 years postoperatively. | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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total hip arthroplasty