Treatment portion of medical energy device, manufacturing method therefor, and medical energy device
This treatment portion of a medical energy device treats a biological tissue by transferring energy to the biological tissue, in a state where the treatment portion is in contact with the biological tissue. The treatment portion of the medical energy device includes a main body portion and a covering film. The main body portion transfers energy to the biological tissue. The covering film contains silicone as a main component, and covers the surface of the main body portion. The silicone includes at least a D unit and a T unit. In the silicone, the molar ratio of silicon atoms forming the D unit with respect to all the silicon atoms is 40-99%. In the silicone, the molar ratio of methyl functional groups bonded to the silicon atoms with respect to all functional groups bonded to the silicon atoms is at least 60%.
1 . A treatment portion of a medical energy device that treats a biological tissue by transferring energy to the biological tissue, in a state where the treatment portion is in contact with the biological tissue, the treatment portion comprising:
a main body portion that transfers the energy to the biological tissue; and
a covering film that contains silicone as a main component and covers a surface of the main body portion,
wherein the silicone includes at least a D unit and a T unit,
in the silicone, a molar ratio of silicon atoms forming the D unit with respect to all the silicon atoms is 40% or more and 99% or less, and
in the silicone, a molar ratio of methyl functional groups bonded to the silicon atoms with respect to all functional groups bonded to the silicon atoms is 60% or more, and wherein the covering film has a film structure in which relatively soft portions comprising the silicone are interposed between relatively hard portions comprising a second silicone mainly composed of Q units, with the relatively soft portions containing a higher molar ratio of D units than the relatively hard portions.
2 . The treatment portion of the medical energy device according to claim 1 , wherein, in the silicone, the molar ratio of the silicon atoms forming the D unit with respect to all the silicon atoms is 60% or more and 99% or less.
3 . The treatment portion of the medical energy device according to claim 1 , wherein, in the silicone, the molar ratio of the methyl functional groups bonded to the silicon atoms with respect to all the functional groups is 90% or more.
4 . The treatment portion of the medical energy device according to claim 1 , wherein a film thickness of the covering film is 60 μm or less.
5 . The treatment portion of the medical energy device according to claim 1 , wherein the covering film contains a conductive filler.
6 . The treatment portion of the medical energy device according to claim 5 , wherein the covering film contains the conductive filler at a volume ratio of 40% or more and 90% or less.
7 . The treatment portion of the medical energy device according to claim 1 , wherein a vacancy rate of the covering film is 20% or more and 90% or less.
8 . The treatment portion of the medical energy device according to claim 7 , wherein a film thickness of the covering film is 50 μm or more.
9 . A medical energy device comprising a treatment portion that treats a biological tissue by transferring energy to the biological tissue, in a state where the treatment portion is in contact with the biological tissue, the treatment portion comprising:
a main body portion that transfers the energy to the biological tissue; and a covering film that contains silicone as a main component and covers a surface of the main body portion,
wherein the silicone includes at least a D unit, and
wherein in the silicone, a molar ratio of silicon atoms forming the D unit with respect to all the silicon atoms is 40% or more and 99% or less, and
wherein in the silicone, a molar ratio of methyl functional groups bonded to the silicon atoms with respect to all functional groups bonded to silicon atoms is 60% or more, and
wherein the covering film has a film structure in which relatively soft portions comprising the silicone are interposed between relatively hard portions comprising a second silicone mainly composed of Q units, with the relatively soft portions containing a higher molar ratio of D units than the relatively hard.
10 . A manufacturing method for a treatment portion of a medical energy device that treats a biological tissue by transferring energy to the biological tissue, in a state where the treatment portion is in contact with the biological tissue, the method comprising:
preparing a main body portion and a coating liquid, the main body portion being for transferring the energy to the biological tissue, the coating liquid containing silicone including at least a D unit and a T unit and being a polymer in which a molar ratio of silicon atoms forming the D unit with respect to all the silicon atoms is 40% or more and 99% or less, and a molar ratio of methyl functional groups bonded to the silicon atoms with respect to all functional groups bonded to the silicon atoms is 60% or more;
applying the coating liquid to a surface of the main body portion; and
forming a covering film which contains the silicone as a main component and covers the surface of the main body portion by heating and curing the applied coating liquid and wherein the covering film has a film structure in which relatively soft portions comprising the silicone are interposed between relatively hard portions comprising a second silicone mainly composed of Q units, with the relatively soft portions containing a higher molar ratio of D units than the relatively hard.