- Email: [email protected]
Textiles in surgery
TEXTILES IN SURGERY Organised Engineering
by the Department
of Textile Technology at UMIST
Manchester, UK, in association with the Biological
Society B]iomaterials Group, 17 May 1.986
Thirty six articipants attended this meeting, introduce B by Mr R. Beech of the Department of Textiles, University of Manchester Institute of Science and Technology (UMIST). Dr Newton of the same Department discussed the structure of textiles currently in use, including methods of wefting and warping and the production of velour. Mr A. Strover (Bromsgrove General Hospital) described the application of textile technology to artificial ligaments for the knee. This included an examination of the mechanical properties of carbon fibres and Dacron braiding, and the way in which braiding techniques could alter mechanical behaviour to mimic natural cruciate ligaments of the knee. He presented histological evidence and described the implantation techniques for artificial ligaments. Dr J. Bradley (Hampshire) illustrated the use of structural techniques in carbon-fibrereinforced plating systems for the tibia. Lamination and frbre orientation were discussed, together with methods for changing the mechanical behaviour to make it comparable with bone and thereby prevent the possible onset of stress protection and disuse osteroporosis. Although these plates have been used in a small clinical study, they are no longer produced. There followed a workshop in which three speakers discussed the use of textile technology in orthopaedic surgery. Dr J. Brown (Dunlop Medical Products) presented the results of his animal studies and the rationale of using braided patch material and carbon fibre rods in orthopaedic surgery to resurface degenerate joints. Dr J. Minns (Dryburn Hospital) reported the clinical results from a small study in which the materials were used for resurfacing articular cartilage in the knee; this was illustrated by a video recording showing the appearance following implantation of both carbon fibre rods and patches. Dr B. Seedhom (Leeds University) described his work on the mechanical testing of a Dacron ligament and showed the histological response to the prosthesis implanted in pigs. Encouraging clinical results have been seen. Dr D. Annis discussed development of vascular prostheses at the University of Liverpool. He described the implantation of non-woven
electrostatically spun polyurethane artificial arteries in pigs and the clinical use of this material. Dr I. Capperauld (Ethicon Ltd) presented data on the physical properties which relate to the strength and performance of sutures: tensile strength, tissue reaction, absorption and the knotting and handling properties. He postulated that the future for braided material lies in differing constructions of the braiding and the fibre core in order to improve handling and reduce the coefficient of friction as well as the incorporation of anti-microbial agents to prevent the braided sutures from becoming infected. New ideas such as stapling, glueing and ultrasonic welding might threaten the future of textiles in tissue but surgeons have grown accustomed to handling braided suture materials and so it could be a long time before these new techniques are accepted. He emphasized the time required to obtain a registration for new materials, in some cases up to 10 years before approval for clinical use. There followed a second workshop on the application of textile technology to general surgery. Dr How (University of Liverpool) discussed the effect of braiding techniques on the mechanical behaviour, in particular relaxation, of the arterial walls of vascular prostheses. Dr J. Minns described with a video demonstration the application of braided carbon libres to prosthetic herniorraphy and the early results of 119 clinical cases. Mr L. Tinckler described his surgical techniques and clinical experience of Marlex mesh for herniorraphy; he had used this material in over a thousand clinical cases with good acceptance and little difficulty. He discussed the handling and his postoperative clinical experience of the Dacron material. This was a very interesting meeting which, because of its small numbers, permitted a lively and informal discussion. A future meeting is being planned on the application of textiles to surgical and medical dressings for October 1987. Information may be obtained from Mr R. Beech, Department of Textiles, UMIST, PO Box 88, Sackville Street, Manchester M60 lQD, UK. RJ
J. Biomed.
Minns
Eng. 1987, Vol. 9, Aptil
189
by the Department
of Textile Technology at UMIST
Manchester, UK, in association with the Biological
Society B]iomaterials Group, 17 May 1.986
Thirty six articipants attended this meeting, introduce B by Mr R. Beech of the Department of Textiles, University of Manchester Institute of Science and Technology (UMIST). Dr Newton of the same Department discussed the structure of textiles currently in use, including methods of wefting and warping and the production of velour. Mr A. Strover (Bromsgrove General Hospital) described the application of textile technology to artificial ligaments for the knee. This included an examination of the mechanical properties of carbon fibres and Dacron braiding, and the way in which braiding techniques could alter mechanical behaviour to mimic natural cruciate ligaments of the knee. He presented histological evidence and described the implantation techniques for artificial ligaments. Dr J. Bradley (Hampshire) illustrated the use of structural techniques in carbon-fibrereinforced plating systems for the tibia. Lamination and frbre orientation were discussed, together with methods for changing the mechanical behaviour to make it comparable with bone and thereby prevent the possible onset of stress protection and disuse osteroporosis. Although these plates have been used in a small clinical study, they are no longer produced. There followed a workshop in which three speakers discussed the use of textile technology in orthopaedic surgery. Dr J. Brown (Dunlop Medical Products) presented the results of his animal studies and the rationale of using braided patch material and carbon fibre rods in orthopaedic surgery to resurface degenerate joints. Dr J. Minns (Dryburn Hospital) reported the clinical results from a small study in which the materials were used for resurfacing articular cartilage in the knee; this was illustrated by a video recording showing the appearance following implantation of both carbon fibre rods and patches. Dr B. Seedhom (Leeds University) described his work on the mechanical testing of a Dacron ligament and showed the histological response to the prosthesis implanted in pigs. Encouraging clinical results have been seen. Dr D. Annis discussed development of vascular prostheses at the University of Liverpool. He described the implantation of non-woven
electrostatically spun polyurethane artificial arteries in pigs and the clinical use of this material. Dr I. Capperauld (Ethicon Ltd) presented data on the physical properties which relate to the strength and performance of sutures: tensile strength, tissue reaction, absorption and the knotting and handling properties. He postulated that the future for braided material lies in differing constructions of the braiding and the fibre core in order to improve handling and reduce the coefficient of friction as well as the incorporation of anti-microbial agents to prevent the braided sutures from becoming infected. New ideas such as stapling, glueing and ultrasonic welding might threaten the future of textiles in tissue but surgeons have grown accustomed to handling braided suture materials and so it could be a long time before these new techniques are accepted. He emphasized the time required to obtain a registration for new materials, in some cases up to 10 years before approval for clinical use. There followed a second workshop on the application of textile technology to general surgery. Dr How (University of Liverpool) discussed the effect of braiding techniques on the mechanical behaviour, in particular relaxation, of the arterial walls of vascular prostheses. Dr J. Minns described with a video demonstration the application of braided carbon libres to prosthetic herniorraphy and the early results of 119 clinical cases. Mr L. Tinckler described his surgical techniques and clinical experience of Marlex mesh for herniorraphy; he had used this material in over a thousand clinical cases with good acceptance and little difficulty. He discussed the handling and his postoperative clinical experience of the Dacron material. This was a very interesting meeting which, because of its small numbers, permitted a lively and informal discussion. A future meeting is being planned on the application of textiles to surgical and medical dressings for October 1987. Information may be obtained from Mr R. Beech, Department of Textiles, UMIST, PO Box 88, Sackville Street, Manchester M60 lQD, UK. RJ
J. Biomed.
Minns
Eng. 1987, Vol. 9, Aptil
189