Nintinol Leaf Springs Used in Compression Anastomosis Device
Posted: May 17, 2010
Amir Weizman of NiTi Surgical Solutions (Netanya, Israel) presented his company’s work on the BowelRing device that is used in compression anastomosis. The device enables a sutureless surgical procedure designed to connect tissues in the digestive system.
Two spring leaves are used to compress tissue from both structures, inducing necrosis. Leak tightness and homeostasis is key to the first stage of the process. As healing progresses, tissue thickness is reduced and a decreasing force is applied. Force should steadily decrease in order to avoid untimely cutting of the tissue, but it must continue until new cells build the connection.
To design the device, researchers employed superelastic NiTi and worked to find a way to optimize the geometry of the leaves. The team employed finite element analysis (FEA) to gain control of the different stages in the force-displacement profile. Regulating the spring’s mechanical behavior, says Weizman, enables better control of the compression, and therefore patient outcomes.
Click here for a summary of the presentation.
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