Custom seating manufacturing using the Topographic Delineation Fabrication Process (TDFP)

Each example shown below was hand laminated by technicians using detailed body measurements and our exclusive Topographic Delineation Fabrication Process (no cast or mold). Every contoured feature (Topographic Delineation) of the seat and backrest components were fabricated using a set of three-dimensional formulas and configuration requirements based upon the postural enhancement goals identified for the client and the correlation between their body dimensions and the mobility base (or support frame parameters). Added to the basic set of specifications were additional formulated alterations, which enhanced the effect of a specific support feature as identified at the initial assessment. As with any custom fabricated system a trial fitting, prior to upholstery, ensured that all goals were met, or clarified where changes were necessary.

For the seat cushion, Topographic Delineations are classified as either an elevation or depression contour from a baseline thickness of support foam underneath the femoral portion of the thighs. The seat structure is built either upward or downward from that baseline thickness. The pelvic floor structure and its orientation is what dictates the overall configuration of the seat and everything else that occurs either above or below that level. It is the first structural feature to be constructed and includes a specification for foam type and density. Our number-one rule is that, when completed, there must be at least 1½” of foam below the ischial tuberosities (varies per body weight and size) to ensure sufficient protection for the skin from outside forces (impact and vibration) or foam deterioration.

Thigh support structures and foam densities are the next elements specified and are based upon what physically or orthopedically is occurring at the hips and knees. Contracture accommodations or a leg-length discrepancy are major structural considerations. Next is thigh alignment to increase pelvic stability or decrease the negative effects of extensor (pelvic) thrust. Flexion or extension wedges, hip adductor guides and built-in pommels are just a few Topographic Delineations that can be added as outlined by the clinician or dealer. It should be noted here, that a simple hip flexion wedge of 10º will not by itself produce 10º of flexion at the hip joints. A clear understanding of the structural anatomy of the thigh is very important to achieve consistent and reproducible postural outcomes.

Backrest construction can be broken down into a similar list that specifies features, considerations and goals. Again, minimum thickness and foam density must be identified for the base support. Usually, this minimum is located at the apex of a scoliosis deformity or at the level of the inferior angle of the scapulas. From this base structure all other Topographic Delineations are identified and added. These features usually include a posterior pelvic support, lateral trunk stabilizers, deformity or bony prominence accommodations, a built-in headrest (if required) and then accessories such as trunk pads, etc.

The Topographic Delineation Fabrication Process is a quantifiable and reproducible process. By our use of this exclusive process every structural element of the support profile is separately identified and given strict rules with specifications for shape and construction. Together with meticulous record keeping any seat or backrest component can be reproduced at any time in the future and by any appropriately trained technician. Finally, the end product will be identical as the first no matter how many times it is reproduced or what support structure it will be mounted to.