Source: https://patents.google.com/patent/US9810836B2/en
Timestamp: 2018-07-19 12:32:15
Document Index: 430654739

Matched Legal Cases: ['art 80', 'arts 82', 'arts 83', 'arts 83', 'arts 82', 'arts 82', 'arts 82', 'arts 83', 'arts 83', 'art 80', 'art 71', 'art 71', 'arts 82', 'arts 83', 'arts 382', 'arts 383', 'art.\n10', 'art.\n11']

US9810836B2 - External tube, laser transmission path, and laser treatment tool - Google Patents
US9810836B2
US9810836B2 US13469774 US201213469774A US9810836B2 US 9810836 B2 US9810836 B2 US 9810836B2 US 13469774 US13469774 US 13469774 US 201213469774 A US201213469774 A US 201213469774A US 9810836 B2 US9810836 B2 US 9810836B2
US13469774
US20120289949A1 (en )
Now, the laser transmission path 70 will be described with reference to FIG. 3 through FIG. 5. FIG. 3 provides isometric views illustrating a structure of the operation unit 12. In more detail, FIG. 3(a) is an isometric view of the curved tube section 23, and FIG. 3(b) is an enlarged view of part “a” in FIG. 3(a).
FIG. 4 provides isometric views illustrating a structure of the laser transmission path 70. FIG. 4(a) is an isometric view of the laser transmission path 70 in which an external tube 80 and a tip ejection outlet member 71 are shown as being partially cut away, and FIG. 4(b) is an isometric view of the external tube 80. FIG. 4(c) is an isometric view of the tip ejection outlet member 71, and FIG. 4(d) is an isometric view of the hollow waveguide path 90. FIG. 4(e) is an isometric view of the tip ejection outlet member 71 in the state where the hollow waveguide path 90 is inserted thereinto.
In FIG. 4(b), a tip insertion part 80 a of the external tube 80 into which the tip ejection outlet member 71 is insertable is shown as being transparent. In FIG. 4(e), the tip ejection outlet member 71 is shown as being partially cut away, and the hollow waveguide path 90 is shown as being transparent.
FIG. 5 provides cross-sectional views illustrating the laser transmission path 70. FIG. 5(a) is a vertical cross-sectional view of FIG. 5(b) taken along line C-C, of the laser transmission path 70 inserted into the forceps insertion path 19 of the endoscope tube 21. FIG. 5(b) is a cross-sectional view of FIG. 5(a) taken along line A-A and seen in the direction of the arrows of line A-A. FIG. 5(c) is a cross-sectional view of FIG. 5(a) taken along line B-B and seen in the direction of the arrows of line B-B.
The external tube 80 is a hollow flexible resin tube having an insertion space 81 corresponding to an insertion hole therein. The external tube 80 has a diameter approximately equal to an inner diameter of the forceps insertion path 19 of the endoscope tube 21. The external tube 80 includes outer circumferential convexed parts 82 corresponding to projections and outer circumferential concaved parts 83 corresponding to concaved parts or gap formation parts. The outer circumferential concaved parts 83 are each provided between adjacent circumferential convexed parts 82 and are recessed with respect to the circumferential convexed parts 82. The circumferential convexed parts 82 and the outer circumferential concaved parts 83 are located side by side in a circumferential direction of the external tube 80, so that the external tube 80 is generally gear-like when seen in a front cross-sectional view as shown in FIG. 5(b) and FIG. 5(c). In the state where the external tube 80 is inserted into the endoscope tube 21, a gap between each of the outer concaved parts 83 and an inner circumferential surface 19 a of the forceps insertion path 19 acts as the inhalation guide path 19 b.
A part of the insertion space 81 of the external tube 80 other than the tip insertion part 80 a accommodates sub passages 84 (84 a, 84 b and 84 c) corresponding to fluid passages. As shown in the cross-section in FIG. 5(c), the sub passages 84 (84 a, 84 b and 84 c) are formed at three different positions along the circumferential direction of the external tube 80. The sub passages 84 (84 a, 84 b and 84 c) are formed on an inner circumferential surface of the external tube 80 and extend in a longitudinal direction thereof.
The sub passages 84 are sized such that inner tips thereof in the cross-sectional view shown in FIG. 5(c) define a circle which is larger by a certain degree than an outer diameter of the hollow waveguide path 90 inserted into the insertion space 81.
The central radiation hole 72 includes a front radiation hole 72 a formed in the front cylindrical part 71 a and a rear radiation hole 72 b formed in the rear cylindrical part 71 b (see FIG. 4(e)). The front radiation hole 72 a has a diameter which is approximately equal to the outer diameter of the hollow waveguide path 90 and allows insertion of the hollow waveguide path 90. The rear radiation hole 72 b has a diameter which is larger by a certain degree than the outer diameter of the hollow waveguide path 90 and has a gap around the hollow waveguide path 90 inserted thereinto.
As shown in the vertical cross-sectional view of FIG. 5(a), the hollow waveguide path 90 is a cylindrical member having a tip part which is insertable into the front irradiation hole 72 a of the central irradiation hole 72 and having the outer diameter which is equal to an inner diameter of the front irradiation hole 72 a. The inner circumferential surface of the hollow cylindrical member is entirely covered with a dielectric thin film 91. The cylindrical member used to form the hollow waveguide path 90 is formed to be lengthy, and is formed of glass or the like, namely, a material which has a smooth surface and is suitable for forming a reflective film of silver or the like and a dielectric thin film. The dielectric thin film 91 is formed of an appropriate material capable of reflecting and transmitting laser light highly efficiently, for example, COP (cyclic olefin polymer), polyimide or the like.
A base part of the assist gas sub passage 84 a is connected to the assist gas ejection section 59 of the laser treatment device 50. Accordingly, the assist gas 59 a ejected by the assist gas ejection section 59 is guided from the base part to a tip part of the assist gas sub passage 84 a, and can be ejected forward from the assist gas ejection hole 73 of the tip ejection outlet member 71.
A base part of the diseased part treatment water sub passage 84 b is connected to the diseased part treatment irrigation section 62 of the laser treatment device 50. Accordingly, the diseased part treatment water 62 a supplied by the diseased part treatment irrigation section 62 is guided from the base part to a tip part of the diseased part treatment water sub passage 84 b, and can be released forward from the irrigation hole 74 of the tip ejection outlet member 71.
The cooling water 60 a for cooling the hollow waveguide path 90 is supplied to the cooling water passages 85 such that the cooling water 60 a flows in a direction in which the treatment laser light 57 a is directed. Owing to this, the hollow waveguide path 90 which has been heated by the treatment laser light 57 a can be cooled by the cooling water 60 a flowing in the fluid passage. Therefore, the laser transmission path 70 for providing the treatment laser light 57 a for treating the operation target site with certainty can be improved in durability.
For example, an external tube 180 shown in FIG. 6(a) has a generally triangular shape as seen in a front cross-section. The triangular shape is formed of three convexed apexes 182 and sides 183 located there between. The sides 183 are recessed with respect to the apexes 182 in a radial direction. As seen in the front cross-section, the external tube 180 includes the insertion space 81 at a center thereof, and also includes sub passages 184 (184 a, 184 b, 184 c) respectively in the vicinity of the apexes 182.
An external tube 280 shown in FIG. 6(b) has a generally gear-like shape as seen in a front cross-section. The generally gear-like shape is formed of the outer circumferential convexed parts 82 and the inner circumferential concaved parts 83. As seen in the front cross-section, the external tube 280 includes the insertion space 81 at a center thereof. A passage outer to the insertion space 81 is equally divided into three in the circumferential direction of the insertion space 81 and thus sub passages 284 (284 a, 284 b, 284 c) are formed.
An external tube 380 shown in FIG. 6(c) has an elliptical shape as seen in a front cross-section. The elliptical cross-section is longer in the up-down direction in FIG. 6(c). Arcked parts 382 at both ends of the longer axis of the elliptical cross-section contact the inner circumferential surface 19 a of the forceps insertion hole 19, and the inhalation guide paths 19 b are formed between arcked parts 383 at both ends of the shorter axis of the elliptical cross-section and the inner circumferential surface 19 a of the forceps insertion hole 19.
Owing to such structures, the external tubes 180, 280 and 380 shown in FIG. 6(a) through FIG. 6(c) also provide substantially the same effects as those of the external tube 80 described above.
1. A laser transmission device for use in an endoscope having a treatment instrument channel comprising:
an external tube comprising:
a tube wall having an outer circumferential surface and an inner surface;
a plurality of convex parts and a plurality of concave parts arranged on the outer circumferential surface of the external tube at regular intervals;
a plurality of projections projecting inward in a radial direction from the inner surface of the external tube, located at an equal interval on the inner surface in a circumferential direction of the external tube; and
an insertion channel defined by the inner surface of the tube wall;
a hollow laser waveguide inserted into the external tube insertion channel; and
a plurality of fluid passages, wherein a first set of fluid passages are located inside the plurality of projections and another set of fluid passages are defined between an outer surface of the hollow laser waveguide and the inner surface of the external tube,
wherein the laser transmission device is configured for insertion into the treatment instrument channel formed in a longitudinal direction of an external hose of the endoscope
such that the plurality of convex parts contact an inner surface of the endoscope treatment instrument channel.
2. The laser transmission device according to claim 1, wherein the plurality of fluid passages are located between the hollow waveguide inserted into the insertion channel and an inner surface of the insertion channel, at an equal interval with respect to the inner surface.
3. The laser transmission device according to claim 1, wherein:
the external tube is inserted into the endoscope treatment instrument channel; and
the external tube further comprises:
projections located at least at two positions as seen in a cross-section of the external tube, and projecting outward in a radial direction such that in the state where the external tube is inserted into the endoscope treatment instrument channel, tips of the projections are in contact with the inner surface of the endoscope treatment instrument channel; and
gap formation parts for forming gaps together with the inner surface of the endoscope treatment instrument channel, the gaps being formed between adjacent projections of the at least two projections.
4. The laser transmission device according to claim 3, wherein:
the external tube includes the plurality of convex and concave parts so as to have a gear-like cross-section; and
the convex and concave parts form the projections and the gap formation parts.
5. The laser transmission device according to claim 3, wherein:
6. The laser transmission device according to claim 3, wherein:
the external tube has an elliptical cross-section; and arcked parts at ends of a longer axis of the elliptical cross-section form the projections, and arcked parts at ends of a shorter axis of the elliptical cross-section form the gap formation parts.
7. The laser transmission device according to claim 1, wherein one of the plurality of fluid passages is a cooling water channel for supplying cooling water for cooling the hollow waveguide path such that the cooling water flows in a direction in which the laser light is directed.
8. The laser transmission device according to claim 7, wherein one of the plurality of fluid passages which is different from the cooling water channel is a cooling water recovery channel for allowing the cooling water which has cooled the hollow waveguide to flow in a direction opposite to the direction in which the laser light is directed and thus recovering the cooling water.
9. The laser transmission device according to claim 7, wherein one of the plurality of fluid passages which is different from the cooling water channel is an irrigation channel for supplying irrigation water such that the irrigation water flows in the direction in which the laser light is directed and is released toward a diseased part.
10. The laser transmission device according to claim 7, wherein one of the plurality of fluid passages which is different from the cooling water channel is an assist gas channel for supplying assist gas such that the assist gas flows in the direction in which the laser light is directed and is released toward a diseased part.
11. A laser treatment tool, comprising:
the laser transmission device according to claim 1.
12. A laser treatment tool, comprising:
a laser control section;
the laser transmission device according to claim 1;
a fluid inhalation unit connected to gap formation parts; and fluid absorption channels formed by the gap formation parts.
13. The laser treatment tool according to claim 11, wherein the laser light is carbon dioxide laser light.
14. The laser transmission path according to claim 1, wherein the external tube further comprises projections located at least at two positions as seen in a cross-section of the external tube, and projecting outward in a radial direction such that in the state where the external tube is inserted into the endoscope treatment instrument channel, tips of the projections are in contact with the inner surface of the endoscope treatment instrument channel; and
gap formation parts for forming gaps together with the inner surface of the endoscope treatment instrument channel, the gaps being formed between adjacent projections of the at least two projections, and wherein each gap formation part comprises the fluid passage.
15. The laser transmission path according to claim 1, wherein the plurality of fluid passages are arranged inside the inner surface of the endoscope treatment instrument channel as another device channel for the endoscope in a radial direction of the external tube.
16. An external tube comprising:
an insertion channel defined by the inner surface of the tube wall, that allows insertion of a hollow waveguide;
a plurality of projections projecting inward in a radial direction from the inner surface of the external tube, located at an equal interval on the inner surface in a circumferential direction of the external tube;
a plurality of fluid passages, wherein a first set of fluid passages are located inside the plurality of projections and another set of fluid passages are defined between an outer surface of the hollow waveguide path and the inner surface of the external tube; and
a plurality of convex parts and a plurality of concave parts arranged on the outer circumferential surface of the external tube at regular intervals, wherein the external tube is configured to be included in a laser transmission device for use in an endoscope having a treatment instrument channel, the laser transmission device includes a hollow waveguide that guides laser light, the laser transmission device is configured for insertion into the treatment instrument channel formed in a longitudinal direction of an external hose of the endoscope
17. The external tube according to claim 16, wherein the plurality of fluid passages are arranged inside the inner surface of the endoscope treatment instrument channel as another device channel for the endoscope in a radial direction of the external tube.
US13469774 2011-05-11 2012-05-11 External tube, laser transmission path, and laser treatment tool Active US9810836B2 (en)
US9810836B2 true US9810836B2 (en) 2017-11-07
US13469774 Active US9810836B2 (en) 2011-05-11 2012-05-11 External tube, laser transmission path, and laser treatment tool
DE (1) DE102012008911A8 (en)
US20170319267A1 (en) * 2016-05-05 2017-11-09 Covidien Lp Ablation instruments with a member having a triangular cross-section
JPS62148675A (en) 1985-12-24 1987-07-02 Asahi Optical Co Ltd Body cavity pressure regulator of laser remedy apparatus
US5150373A (en) 1990-03-15 1992-09-22 Richard Wolf Gmbh Device for rinsing a hollow guide for carbon dioxide lasers
US20040179796A1 (en) 2001-03-09 2004-09-16 Christian Jakobsen Fabrication of microstructured fibres
JP2006341066A (en) 2005-05-13 2006-12-21 Olympus Medical Systems Corp Medical treatment instrument
JP2007533374A (en) 2004-04-08 2007-11-22 オムニガイド インコーポレイテッドＯｍｎｉｇｕｉｄｅ，Ｉｎｃ． Medical system comprising a photonic crystal fiber and a photonic crystal fiber
Haswell, Charles Haynes (1920). Mechanics' and Engineers' Pocket-book of Tables, Rules, and Formulas. Harper & Brothers. Retrieved Apr. 9, 2007. *
The American Heritage® Dictionary of the English Language, Fourth Edition copyright © 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. *
DE102012008911A1 (en) 2012-11-15 application
DE102012008911A8 (en) 2013-03-07 grant
US20120289949A1 (en) 2012-11-15 application
US5746738A (en) 1998-05-05 Laser surgical device
US20050113641A1 (en) 2005-05-26 Endoscopic imaging and intervention system