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Prosthetics

Prosthesis - replaces a missing limb or body segment (Orthotic supports a body segment)

Amputations should be considered constructive procedure rather than destructive.

Amputation Levels (for prosthesis fitting):   

Optimum   

Shortest   

Longest

Transradial (forearm)   

junction prox 2/3 & distal 1/3   

3cm below biceps insertion   

 5cm above wrist joint

Transhumeral   

middle third   

4cm below axillary fold   

10cm above olecranon

Transfemoral   

middle third   

8cm below pubic ramus   

15cm above medial joint line of knee

Transtibial   

8cm for every metre of height   

7.5cm below medial joint line of knee   

level at which myoplasty can be done

Disarticulations

Advantages:

  1. retention of WBing surface

  2. bulbous stump assists prosthetic suspension

Disadvantages:

  1. compromise the choice & siting of joint

  2. bulky appearing prosthesis

Ideal Stump:

  1. Healed, mobile scar

  2. Sensate

  3. Cylindrical or conical shape

  4. Myoplastic procedure 

  5. Nerves sectioned under tension

  6. Bone ends bevelled




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