Frequently asked questions

When we compensate a pear-shaped stump, we follow a simple rule: A given perimeter can not be more than 0.5cm smaller than any other more distal perimeter You have ordered a compensated liner, and when trying it on the patient you measure more than this difference ? There can be several explanations: #1 - Is the liner stretched vertically ? When rolling a compensated liner on the limb, the inside surface stretches out right before it comes in contact with the skin, which gradually stretches out the liner in the longitudinal direction when donning. This is accentuated by the thick pear-shape compensation pads. This can typically occur for ankle disarticulation cases (e.g. Symes). This vertical stretching leads to the designed thicknesses not being located where they are intended, which can result in an unsuitable pear-shape compensation. You can check if the liner is stretched vertically on the limb by measuring the length of the liner between distal end and a reference point of your choice when relaxed and when donned. To counter this longitudinal stretching effect, ensure you release the tension iteratively when you don the liner, as shown below: Alternatively, you can apply cream on the limb prior to donning, to prevent the inner silicone surface from sticking to the skin, so the liner can get back to its natural length. #2 - You tried the above and it still doesn't work ? The error might then come from somewhere else. This could be from the scan, from the 3D modelling, from the way the tissues move during donning, or something else we didn't anticipate. In any case, you should take some videos, photos and measurements to illustrate the issue, and file a warranty claim. Our staff will contact you rapidly to discuss options to resolve the issue.