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Biomedical subjects

D Stöckel

Publications and source records attributed to D Stöckel.

3 recordsLinked to original sources

The utility of superelasticity in medicine.

Nitinol alloys (Nitinol) exhibit a dramatically enhanced elasticity, known as "superelasticity", which is becoming integral to the design of a variety of new medical products. Elasticity is the most apparent of the advantages afforded by this material, but by no means the only or most important. Also discussed in this paper are features such as biocompatibility, kink resistance, constancy of stress, physiological compatibility, shape memory deployment, dynamic interference and fatigue resistance. Each of these properties is discussed and highlighted through example. Examples presented include stents, filters, retrieval baskets, and surgical tools.

Alloys↗

Using shape-memory alloys.

Design considerations and material selection play important roles in the development of surgical instruments for minimally-invasive procedures. Substituting shape-memory or superelastic metals or alloys for conventional materials can lead to a significant improvement in the overall performance of those instruments. In addition, simplicity of design, a reduced number of parts, and ease of assembly and disassembly result in cost reductions.

Alloys↗

Future trends in endoscopic suturing.

This paper deals with future aspects and developments in endoscopic sutures, needles, needle drivers, and sewing devices. Shape memory alloys such as superelastic nickel-titanium can be used for surgical needles and hingeless needle drivers. A sewing device consists of a T-Needle which can be shuttled between the jaws of specially designed instruments. The jaws possess small elements that grip the needle tips. The "Needle Rotor" facilitates intracorporeal swivelling and positioning of the needle because one jaw can be moved longitudinally over the other. A new "cutting knot pusher" permits immediate cutting of a slip knot subsequent to tightening.

Anastomosis, Surgical↗