发明名称 |
Surgical sealing surfaces and methods of use |
摘要 |
Various embodiments provide compositions that exhibit positive temperature coefficient of resistance (PTCR) properties for use in thermal interactions with tissue-including thermal sensing and I<SUP>2</SUP>R current-limiting interactions. Embodiments also provide tissue-engaging surfaces having PTCR materials that provide very fast switching times between low resistance and high, current-limiting resistance. One embodiment provides a matrix for an electrosurgical energy delivery surface comprising a PTCR material and a heat exchange material disposed within an interior of the matrix. The PTCR material has a substantially conductive state and a substantially non-conductive state. The heat exchange material has a structure configured to have an omni-directional thermal diffusivity for exchanging heat with the PTCR material to cause rapid switching of the PTCR material between the conductive state and non-conductive state. Preferably, the structure comprises a graphite foam having an open cell configuration. The matrix can be carried by tissue contacting surfaces of various electrosurgical devices.
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申请公布号 |
US7220951(B2) |
申请公布日期 |
2007.05.22 |
申请号 |
US20050110363 |
申请日期 |
2005.04.19 |
申请人 |
SURGRX, INC. |
发明人 |
TRUCKAI CSABA;SHADDUCK JOHN H. |
分类号 |
A61B18/14;A61B18/18;A61F2/00 |
主分类号 |
A61B18/14 |
代理机构 |
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地址 |
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