Transcript Slide 1 - Electrical, Computer & Biomedical Engineering

Erik Walder
URI Department of Electrical, Computer, and
Biomedical Engineering
BME 181
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A ring of fibrocartilage
Attached to the
acetabulum
Is an extension of the
hip socket
Force Distribution On Hip Joint
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Helps to distribute the load
the hip joint bears
Deepens the hip joint
 Provides increased stability to
the hip joint
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Decreases friction within the
hip joint
Acetabulu
m
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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
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Hip dysplasia
 Places more stress on the
labrum
 More movement in the
femoral head makes a
tear more likely
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hip degeneration
 Weakened or arthritic
hips make tears more
likely
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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
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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
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Contrast is injected into
the actual labrum
 This procedure
(Arthrogram) takes
anywhere from 15-45
minutes
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The Patient then
undergoes an MRI
Contrast leaks from the
tears, making them
visible
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Labrum is not actually repaired
 No blood vessels = No Growth / Regeneration
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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
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Less cartilage means more stress on acetabulum
and femoral head
Arthritis develops earlier
 Caused by more friction in the joint
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Full hip replacement at an earlier age
Benefits far outweigh the drawbacks
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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
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Traction Table
Arthroscope
Arthroscope
 Fiber optic Camera, Cutting
tools, Suction Tools
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Traction Table
 Pulls Hip slightly out of Joint
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Live X-Ray
 Help Surgeons see that they
are in the right area
C-Arm X-Ray
(Live X-Ray)
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Large Muscle Groups are not severed
 Much Shorter recovery time (1-2 Months)
 Partial Weight Bearing possible earlier than
conventional surgery
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Small Incisions mean less risk of infection
Much easier and shorter recovery than
conventional open hip surgery
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<http://www.conservativehipsolutions.com/images/anterior_hip_joint
_small.jpg>
<http://graphics8.nytimes.com/images/2009/06/01/sports/
0601-spt-WebHIP.gif>
<http://www.thefinalsprint.com/images/2007/05/hip.JPG>
<http://www.lawyersandsettlements.com/blog/wpcontent/uploads/2009/08/mri-image.jpg>
<http://www2.imperial.ac.uk/structuralbiomechanics/projects/freebcp
elvis/fixed_vm_S2S.png>
<http://americanpitbullregistry.com/images/hip%20dysplasia.jpg>
<http://littleastonoasis.com/HipArthroscopy.aspx>
<http://www.biztrademarket.com/User/174576/bb/jpx-c1011_gbn.jpg>