Eth Zurich

University of Zürich

Universitaet Zuerich

Universität Zürich Prorektorat Mnw

Johanna Buschmann

Viola Vogel

Olivera Evrova

A device for repair surgery of cylindrical organs, particularly of ruptured tendons, is configured as a tubular sheath (T) made of a mesh of elastic fibers formed by electrospinning a biocompatible and biodegradable polymer. The tubular sheath has a Young elasticity modulus of about 0.1 to about 4 MPa and a strain at break of about 50 to about 1,000%, and it has a first wall surface and a second wall surface substantially parallel thereto, with said first wall surface being comparatively smooth (W) and said second wall surface being comparatively rough (W). According to the invention, the elastic fibers comprise first fibers consist of polymer in neat form and second fibers consist of polymer with an admixture of a therapeutic agent for stimulating regrowth processes of a predetermined cylindrical organ. The tubular sheath comprises a first tubular region adjacent to the first wall and a second tubular region adjacent to the second wall, said first tubular region being formed of said first fibers and said second tubular region being formed of said second fibers.

Device for repair surgery of cylindrical organs, particularly ruptured tendons, comprising a therapeutic agent for stimulating regrowth, and method of producing such device

A device for repair surgery of cylindrical organs, particularly ruptured tendons, is configured as a tubular sheath (T) made of a biocompatible and biodegradable polymer. The tubular sheath comprises an elastic fiber mesh formed by electrospinning of said polymer and has an inner wall surface and an outer wall surface substantially parallel thereto. One of said wall surfaces is comparatively rough (W) and the other one of said wall surfaces is comparatively smooth (W), with the tubular sheath having a Young elasticity modulus of about 2 to about 5 MPa and an elongation at break of about 50 to about 1,000%. Preferably, the polymer is a biodegradable polyester urethane block copolymer with poly-hydroxy-butyrate as a hard 10 segment and &#x3b5;-caprolactone as a soft segment.

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Zurich, Switzerland

Johanna Buschmann