Term
| How does a manual locking knee work? |
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Definition
| The knee is locked while the wearer is in standing and walking, and is manually unlocked for sitting. |
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Term
| What are the advantages and disadvantages of a manual locking knee? |
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Definition
| Adv: provides complete stability during gait. Disadv: forces wearer to walk w/ extended knee. |
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Term
| what type of knee provides constant friction? |
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Definition
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Term
| What controls the swing phase in the single-axis knee prosthesis? |
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Definition
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Term
| How does a locking knee prosthesis work? |
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Definition
| It has constant friction during swing phase, like a single axis knee as well as a locked knee during stance when weight is shifted onto the leg. It remains locked until weight is shifted off the leg. |
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Term
| What type of prosthesis has a two-wedged wooden mechanism? |
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Definition
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Term
| Does a locking knee (stance controlled) allow for normal gait pattern? |
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Definition
| No. because there is no knee flexion in terminal stance until the weight is fully off the limb. |
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Term
| How many axes does a polycentric knee have? |
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Definition
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Term
| Fluid swing phase control knees provide resistance to motion that is proportional to what? |
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Definition
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Term
| In the traditional quadrilateral socket, what is the function of the posterior wall? |
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Definition
| Weight bearing on ischial tuberosity, and gluteus maximus, posterior push of femur. |
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Term
| Describe the shape of the anterior wall of the quad socket. (3) |
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Definition
| Flat conformation to the femoral triangle, lateral half contoured for rectus femoris, posterior flares for hamstring tendons. |
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Term
| What is the major function of the lateral wall of the quad socket? |
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Definition
| medial-lateral stabilization, and support for the greater trochanter. |
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Term
| What is the shape of the lateral wall of the quad socket? |
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Definition
| sloped to force the femur into slight adduction. |
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Term
| What is the function of the medial wall of the quad socket? |
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Definition
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Term
| What are some problems with the quad socket? |
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Definition
| In closed kinetic chain abduction, you can get a littl excess motion/instability. The ischial tuberosity is not in the sicket at heel strike when hip is in flexion --> instability at start of stance. |
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Term
| What is the major advantage of the quad socket vs the CATCAM? |
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Definition
| it's easier for the pt to control rotation in a quad socket, particularly in swing phase. |
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Term
| What is the inner surface of the medial wall of the quad socket shaped for? |
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Definition
| the adductor longus. (she said this about 7 times, so it might be important ...) |
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Term
| Describe the overall shape of the quad socket in terms of diameter m-->l and a-->p. |
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Definition
| Bigger m-l than a-p --> m-l instability. |
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Term
| Describe the general shape of the CATCAM socket. |
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Definition
| Narrower m-l than a-p --> decr m-l instability. |
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Term
| The design of the CATCAM socket holds the bones in a better position than the quad socket. How? |
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Definition
| The ischial tuberosity is actually contained within the socket. |
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Term
| Which is more stable; quad socket or CATCAM? |
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Definition
| CATCAM. But it doesn't allow as much control of the limb, especially in swing phase. |
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Term
| Against which surfaces within the socket is the ischial tuberosity held? |
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Definition
| the medial-posterior surface. |
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Term
| How does the larger A-P diameter in a CATCAM aid in function? |
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Definition
| Most of the leg muscles act in an a-p direction. Allowing them more room will aid in their function. |
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Term
| How much contact does the flexible socket have with the limb? |
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Definition
| Total contact. There's no sock. |
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Term
| When can the flexible socket be fabricated? |
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Definition
| Not until all the swelling is gone, because it's total contact. |
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Term
| Benefits to the flexible socket |
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Definition
| Incr. proprioceptive input b/c it's molded right against the leg. It doesn't get as hot, b/c it can be built w/ windows to decr. heat. |
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Term
| What type of patient would the flexible socket be good for? |
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Definition
| Very muscular people who can gnerate their own control, b/c it doesn't provide much control, inherently. |
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Term
| What is a silesian band used for? |
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Definition
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Term
| What is the simplest type of suspension? |
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Definition
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Term
| Describe a silesian band in terms of the material, the attachments, and where it goes. |
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Definition
| It's a leather strap that originates on the lateral wall, circles around the opposite side of the pelvis and is attached to the front of the socket with a buckle. |
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Term
| which is more stable; silesian band or hip joint pelvic band? |
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Definition
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Term
| What type of prosthetic might you recommend to the pt who has trouble stabilizing the prosthetic in swing phase? |
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Definition
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Term
| Is a suction type prosthesis worn with socks? What implication does this have in your decision to prescribe this type of prosthesis? |
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Definition
| There's no sock. So the pt needs to have good skin condition to wear this. |
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Term
| Which type of suspension would the young, active user prefer; silesian band, hip joint pelvic band or suction socket? |
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Definition
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