Thermotherapy device
First Claim
1. A system for applying energy to tissue comprising a polymeric monolith with fluidic channels therein, the monolith having a tissue-engaging surface for engaging tissue, and a fluid media source that introduces fluid media into the fluidic channels for applying energy to engaged tissue the system further comprising an energy source within the fluidic channels wherein the energy source is configured to modulate between a first initial energy amount to surpass a heat of vaporization of the media and a subsequent energy amount to maintain the media in a vapor phase where application of the first initial energy amount to the fluid media provides a vapor media having an increased volume within the fluidic channels to sufficiently cause ejection of the vapor media from the fluid channels at a high velocity.
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Accused Products
Abstract
This invention relates to the working end of a medical instrument that applies energy to tissue. In one embodiment, the instrument has a microfluidic tissue-engaging surface fabricated by soft lithography means together with optional superlattice cooling means that allows for very precise control of energy application, for example in neurosurgery applications. The tissue-engaging surface can eject a high-heat content vapor into the engaged tissue for treating tissue, while the superlattice cooling structure can prevent collateral thermal damage. Also, the superlattice cooling structure can be used to localize heat at a selected depth in tissue and prevent surface ablation. Also, the superlattice cooling structure can be used to prevent tissue sticking to a thermal energy delivery surface. In another embodiment, the tissue-engaging surface can be used in a jaw structure for sealing tissue together with hydrojet means for transecting the tissue.
387 Citations
22 Claims
- 1. A system for applying energy to tissue comprising a polymeric monolith with fluidic channels therein, the monolith having a tissue-engaging surface for engaging tissue, and a fluid media source that introduces fluid media into the fluidic channels for applying energy to engaged tissue the system further comprising an energy source within the fluidic channels wherein the energy source is configured to modulate between a first initial energy amount to surpass a heat of vaporization of the media and a subsequent energy amount to maintain the media in a vapor phase where application of the first initial energy amount to the fluid media provides a vapor media having an increased volume within the fluidic channels to sufficiently cause ejection of the vapor media from the fluid channels at a high velocity.
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14. A system for applying energy to tissue comprising:
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a polymeric monolith with fluidic channels therein, the monolith having a tissue engaging surface for engaging tissue, a fluid media source that introduces fluid media into the fluidic channels for applying energy to engaged tissue, the system further comprising a power supply configured deliver energy modulated between a first initial energy amount to surpass a heat of vaporization of the media and a subsequent energy amount to maintain the media in a vapor phase where application of the first initial energy amount to the fluid media provides a vapor media having an increased volume within the fluidic channels to sufficiently cause ejection of the vapor media from the fluid channels at a high velocity. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification