Erik Walder URI Department of Electrical, Computer, and Biomedical Engineering BME 181.
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Transcript of Erik Walder URI Department of Electrical, Computer, and Biomedical Engineering BME 181.
Erik WalderURI Department of Electrical, Computer, and Biomedical EngineeringBME 181
A ring of fibrocartilage
Attached to the acetabulum
Is an extension of the hip socket
Force Distribution On Hip JointForce Distribution On Hip Joint
Helps to distribute the load the hip joint bears
Deepens the hip joint Provides increased
stability to the hip joint Decreases friction within
the hip joint
Acetabulum
usually torn when the hip is bearing a load and is twisted suddenly
Trauma to the hip can also cause a tear
Some things can cause the labrum to tear more easily
Hip dysplasia Places more stress
on the labrum More movement in
the femoral head makes a tear more likely
hip degeneration Weakened or
arthritic hips make tears more likely
Pain is not usually felt directly in hip joint
Can feel like a strained groin, quadriceps, or back muscle
a catching or clicking sensation in the hip
Hips suddenly ‘giving way’
Pain is caused by torn pieces being caught in the hip joint
A labrum tear usually has little to no impact on the range of motion
Computer Tomography (CT), Magnetic Resonance Imaging (MRI), and X-Rays will NOT detect a tear
A Magnetic Resonance Arthrogaphy (MRa) in addition to a physical examination is effective
Still cannot be 100% diagnosed until in surgery
Contrast is injected into the actual labrum This procedure
(Arthrogram) takes anywhere from 15-45 minutes
The Patient then undergoes an MRI
Contrast leaks from the tears, making them visible
Labrum is not actually repaired No blood vessels = No Growth / Regeneration
Surgeons clean any loose tissues out of the joint
Torn areas are then removed The labrum is then ‘sculpted’ until it has
a smooth surface and edge again Removing torn tissue means less pain
Less cartilage means more stress on acetabulum and femoral head
Arthritis develops earlier Caused by more friction in the joint
Full hip replacement at an earlier age Benefits far outweigh the drawbacks
Three incisions about one centimeter in diameter are made around the hip region
Tubes are inserted into each of the incisions to make transferring tools between incisions easier
A fiber optic camera allows the surgeon to see inside the joint
Specialized cutting and suction tools are used Minimally Invasive
Arthroscope Arthroscope Traction TableTraction Table
Arthroscope Fiber optic Camera,
Cutting tools, Suction Tools
Traction Table Pulls Hip slightly out of
Joint Live X-Ray
Help Surgeons see that they are in the right area
Arthroscope
C-Arm X-Ray
(Live X-Ray)
Large Muscle Groups are not severed Much Shorter recovery time (1-2 Months) Partial Weight Bearing possible earlier than
conventional surgery Small Incisions mean less risk of
infection Much easier and shorter recovery than
conventional open hip surgery
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content/uploads/2009/08/mri-image.jpg> <http://www2.imperial.ac.uk/structuralbiomechanics/
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