Percutaneous Collar for Exo-prosthetic Limbs

Universitat Politècnica de València Technology Overview
The percutaneous collar consists of a device intended to create the bonds of soft tissues (dermal and fatty) in exo-prosthesis applications for limbs and other percutaneous applications such as ostomies (cystostomies, colostomies, etc.) and gastric applications.
The problem that this collar solves is that it provides an exo-prosthesis device that not only fosters the adhesion of the tissue to the external surface, but also stimulates the internal proliferation of the precursor cells of the new scar tissue in the entire internal volume of the collar. That is, it creates a larger amount of fibrous scar tissue that creates a denser protective barrier that is stronger against infectious agents.
The percutaneous collar also prevents tears in the stoma and reduces marsupialization ().
The percutaneous collar design features three different elements. Each of these elements performs a function and is made from a different material:

A titanium, pure tiO2 flexible inner mesh or grid of polymer material covered with biocompatible material that promotes adhesion to the skin without being covered, or a grid of similar characteristics
A rigid ring made of a titanium alloy or similar
A microporous flexible coating (silicone or similar)

The mesh is crimped on the rigid ring. This ring is designed to create a strong and stable seal with the epidermis and also has a mechanical thread on its interior that is capable of regulating the relative distance between the percutaneous collar and the fatty tissues with the objective of adapting to the variability between different subjects and amputated limbs.
The internal mesh, designed to favor the adhesion of the dermal and epidural tissue while also limiting marsupialization, is covered with a microporous flexible composite (silicone or similar). This promotes the internal growth of the tissue through the microchannels that form the pores connected to the main network of channels that surround the internal mesh. The combination of both materials gives the collar in contact with the soft tissues both musculature as well as fat. It has a structural rigidity that allows it to withstand the weight of these tissues while also adapting to their movements, absorbing the tearing tensions from tugging or falls, created in the area of the bond of the percutaneous collar with the skin tissue and the distal soft tissues.
Stage of Development: Laboratory Prototype

Adaptable to variations in the thickness of soft tissues
It is a flexible system that absorbs the tensions of a tear
Adaptable to different rods
Promotes internal growth and the adhesion of the tissue


In the field of medicine and veterinary medicine.
The collar can be used for the exo-prosthesis of limbs.
In percutaneous applications such as ostomies (cystostomies, colostomies or any related procedure)
In gastric applications, by adapting it to a threaded catheter into the area of the stoma instead of an intramedullary rod

The inventors are looking for companies interested in establishing patent license agreements for its use, manufacture or sale.

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