Gel‐fabric prostheses of the ureter

Abstract

In 14 canines the ureter was substituted with a new type of ureteral gel-fabric prosthesis. The prosthesis is a tube of knitted fabric of polyester fiber case in a layer of hydrophilous glycol methacrylate gel. Anastomoses were carried out by insert'ing the prosthesis ends into the ureter lumen and by suturing the stump of the ureter to a special fixing ring on the prost,hesis. Preliminary results of short-term observat,ions (4 mont,hs) are quite promising. The prosthesis is lion-irritating and coiidiicts t,he urine satisfactorily.

Synthesis, characterization, and in vitro release of ibuprofen from poly(MMA‐HEMA) copolymeric core–shell hydrogel microspheres for biomedical applications

“…Polymeric hydrogel microspheres have recently attracted attention because of their permanent spherical shape 5–9. Many researchers found hydrogel microspheres can be used as carrier matrices in a wide variety of mucosal, biological, and biomedical applications such as ophthalmology,10 drug delivery,11 orthopedics,12 and medical devices 13. The ability of natural tissue to grow into hydrogel matrices makes them very attractive for biomedical uses 14, 15…”

“…[5][6][7][8][9] Many researchers found hydrogel microspheres can be used as carrier matrices in a wide variety of mucosal, biological, and biomedical applications such as ophthalmology, 10 drug delivery, 11 orthopedics, 12 and medical devices. 13 The ability of natural tissue to grow into hydrogel matrices makes them very attractive for biomedical uses. 14,15 The concept of self-anchoring swelling-type orthopedic implants was originally introduced by Greenberg et al 16 in 1978 with the aim of developing implants with superior fixation characteristics over conventional orthopedic and dental implants.…”

Biocomposites

“…Polyester fiber-reinforced glycol methacrylate gel prostheses with a fabric backing was reported to be successful (Kocvara et al, 1967;Hench and Ethridge, 1982). The fabric backing facilitated easy attachment of prosthesis firmly on to the mucous membrane without irritation, and the hydrophilic nature of the gel helped in maintaining a clear inner space.…”

Mimicking “J-Shaped” and Anisotropic Stress–Strain Behavior of Human and Porcine Aorta by Fabric-Reinforced Elastomer Composites

“…As the aorta itself is a composite structure of rubberlike and fiber-like constituents, it is intuitive to develop a fabric-reinforced composite to mimic its properties. In 1967, Kočvara and co-workers developed a gel-fabric prosthesis of the ureter using a tubular knitted fabric of polyester fiber in hydrophilic glycol methacrylate gel . Grande-Allen and co-workers developed a composite scaffold from electrospun polyurethane fibers and polyethylene glycol hydrogel to mimic the tensile strength, anisotropy, and extensibility of the natural aortic valve.…”

“…In 1967, Kocvara and co-workers developed a gel-fabric prosthesis of the ureter using a tubular knitted fabric of polyester fiber in hydrophilic glycol methacrylate gel. 21 Grande-Allen and co-workers 22 developed a composite scaffold from electrospun polyurethane fibers and polyethylene glycol hydrogel to mimic the tensile strength, anisotropy, and extensibility of the natural aortic valve. Haj-Ali and co-workers prepared collagen fiberreinforced alginate hydrogel composites with hyperelastic behavior similar to soft tissues.…”