Patient weight: The patient weight is especially important. The hip sustains a certain amount of weight due to the fact that it is part of the lower body, so there is pressure placed against the hip joint. This pressure can often lead to pain in the hip joint upon sitting down or other actions involving purely hip movement. Patient weight should be measured so that the implant can sustain the weight and bear it under body movements.
Shape: The shape of the hip is similar in patients but not the same. Calcification and other processes can often cause the socket of the hip area to change and alter. Osteoporosis can also have caused the area to weaken, which means that The Hip implant must be shaped accordingly to the patients hip shape. This is critical because there should be less chance of a dislocation or inability to fit the hip implant into the patient’s hip. The shape also affects the motion of the patients hip and that practically initiates movement to the rest of the lower extremities, so shape should be one of the first things to look at when measuring a patient for hip replacement surgery.
Load Transfer: Load transfer goes along the lines of weight, but it also involves the shift of weight from one hip to the other. The load, which we can identify as the body weight of the upper portions of the body (the heaviest parts) obviously shifts from one hip to the other when the patient walks, so there must be an equal load transfer between the hips, which means that THe the hip implant must be able to establish that equal range of transfer.
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