WO2016079803A1 - 医療機器 - Google Patents
医療機器 Download PDFInfo
- Publication number
- WO2016079803A1 WO2016079803A1 PCT/JP2014/080495 JP2014080495W WO2016079803A1 WO 2016079803 A1 WO2016079803 A1 WO 2016079803A1 JP 2014080495 W JP2014080495 W JP 2014080495W WO 2016079803 A1 WO2016079803 A1 WO 2016079803A1
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- WO
- WIPO (PCT)
- Prior art keywords
- medical device
- insertion portion
- suction
- peripheral surface
- outer peripheral
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00147—Holding or positioning arrangements
- A61B1/00154—Holding or positioning arrangements using guiding arrangements for insertion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
- A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
- A61B1/00094—Suction openings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00112—Connection or coupling means
- A61B1/00121—Connectors, fasteners and adapters, e.g. on the endoscope handle
- A61B1/00128—Connectors, fasteners and adapters, e.g. on the endoscope handle mechanical, e.g. for tubes or pipes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00147—Holding or positioning arrangements
- A61B1/00148—Holding or positioning arrangements using anchoring means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/005—Flexible endoscopes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
- A61B1/015—Control of fluid supply or evacuation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00238—Type of minimally invasive operation
- A61B2017/00243—Type of minimally invasive operation cardiac
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/30—Surgical pincettes without pivotal connections
- A61B2017/306—Surgical pincettes without pivotal connections holding by means of suction
- A61B2017/308—Surgical pincettes without pivotal connections holding by means of suction with suction cups
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0133—Tip steering devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/02—Holding devices, e.g. on the body
- A61M25/04—Holding devices, e.g. on the body in the body, e.g. expansible
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/06—Body-piercing guide needles or the like
- A61M25/0662—Guide tubes
Definitions
- the present invention relates to a medical device.
- a cardiac surgery method in which a medical device such as a catheter or an endoscope is inserted into the pericardial space through the pericardium from under the xiphoid process, and the heart is treated from the outside in the pericardial cavity.
- a medical device such as a catheter or an endoscope is inserted into the pericardial space through the pericardium from under the xiphoid process, and the heart is treated from the outside in the pericardial cavity.
- the movement direction of the medical device is limited to the direction along the heart surface. Furthermore, since the position of the medical device inserted into the pericardial cavity is fixed at two locations on the body surface and the pericardium, the operation of the medical device that can be performed in the pericardial cavity is an advance / retreat operation in the longitudinal direction. Further, the rotation is limited to the rotation operation around the longitudinal axis and the bending operation of the bending portion provided at the tip. Under such constraints, there is a problem that the area that can be treated is limited because the area on the heart surface where the tip of the medical device can be approached is limited. In particular, it is difficult to approach the apex located on the side of the pericardial penetration position of the medical device, and it is difficult to apply it to the treatment of myocardial infarction at the apex.
- the present invention has been made in view of the above-described circumstances, and an object thereof is to provide a medical device capable of easily approaching an arbitrary position of the heart within the pericardial cavity.
- One aspect of the present invention is a flexible elongated insertion portion that can be inserted into a living body, and is provided on an outer peripheral surface of the insertion portion at a midway position in the longitudinal direction of the insertion portion.
- An adsorbing portion having a suction opening that adsorbs the tissue in the living body by opening in the radial direction outside the direction, and the adsorbing portion is attached to the insertion portion so as to be rotatable about an axis substantially in the same direction as the radial direction.
- a medical device including a rotation mechanism.
- the insertion portion in a state where the insertion portion penetrates the pericardium from the body surface and is inserted into the pericardial cavity, the insertion portion is disposed so as to block the suction port with the heart or the pericardium, and the heart is placed on the suction port.
- the midway position in the longitudinal direction of the insertion portion is fixed to the heart or pericardium.
- the suction portion and the insertion portion are relatively rotatable about an axis in a substantially normal direction of the heart surface by the rotation mechanism, so that the portion on the distal end side of the suction portion of the insertion portion is placed on the heart surface.
- the entire portion of the insertion portion located in the pericardial cavity is curved in a substantially C shape or a substantially U shape.
- the curved shape of the insertion portion is controlled by the heart's adsorption position by the adsorption portion and the amount of insertion of the insertion portion into the pericardial cavity.
- the bending operation is possible in addition to the longitudinal movement of the insertion portion, so that the approachable range of the distal end of the insertion portion in the pericardial cavity is widened, and the distal end of the insertion portion can be moved to any arbitrary surface of the heart. The position can be easily approached.
- the rotation mechanism includes an annular fixing ring fixed to the insertion portion, and the suction portion includes an annular rotation ring disposed coaxially with the fixing ring,
- One of the fixing ring and the rotating ring has an annular recess extending in the circumferential direction on the inner peripheral surface or the outer peripheral surface, and the other of the fixing ring and the rotating ring is the outer peripheral surface or the inner peripheral surface.
- the projection may be fitted into the recess in a snap-fit manner.
- the said insertion part may have a bending part which can be bent to the front end side rather than the said adsorption
- the suction part is rotated in the circumferential direction with respect to the insertion part, so that the suction port is attracted to the position facing the heart or pericardium without rotating the whole insertion part around the longitudinal axis.
- the position of the part can be adjusted in the circumferential direction of the insertion part.
- the insertion part was rotated around the adsorption part by moving the adsorption part linearly in the longitudinal direction with respect to the insertion part and changing the fixing position of the insertion part with respect to the heart or pericardium.
- the movable range of the distal end of the insertion portion can be changed.
- the medical device may be an endoscope.
- the endoscope can be directly fixed to the heart or the heart by the suction portion, and the distal end of the endoscope can be accurately positioned at a desired position on the heart surface.
- the medical device may be a cylindrical guide sheath into which another medical device can be inserted.
- a medical device such as an endoscope or a treatment instrument into and from the pericardial space
- the distal end of the insertion portion of the medical device is inserted into the pericardial space. Can be guided to the substantially same position each time.
- the medical device may be a cylindrical cover sheath that can be attached to and detached from the outer peripheral surface of the insertion portion of another medical device.
- this invention is applicable also to a general purpose medical device by attaching a cover sheath to the insertion part of medical devices, such as a general purpose endoscope and a treatment tool.
- FIG. 1 is an overall configuration diagram of a medical device according to an embodiment of the present invention. It is II sectional drawing of the medical device of FIG. It is a figure explaining the usage method of the medical device of FIG. It is a figure explaining the usage method of the medical device of FIG. It is a figure explaining the usage method of the medical device of FIG. It is a figure explaining the usage method of the medical device of FIG. It is a longitudinal cross-sectional view which shows the modification of the adsorption
- FIG. 10B is a cross-sectional view of the medical device II-II in FIG. 10A. It is a longitudinal cross-sectional view which shows another modification of the adsorption
- FIG. 11B is a cross-sectional view along III-III of the medical device of FIG. 11A. It is a figure explaining the usage method of another modification of the medical device of FIG. It is a figure explaining the usage method of another modification of the medical device of FIG. It is a figure explaining the usage method of another modification of the medical device of FIG. It is a figure explaining the usage method of another modification of the medical device of FIG. It is a figure explaining the usage method of another modification of the medical device of FIG. It is a figure explaining the usage method of another modification of the medical device of FIG. It is a figure explaining the usage method of another modification of the medical device of FIG.
- a medical device is a guide sheath 1 for guiding an endoscope into a body, and as shown in FIG. 1, an elongated cylindrical insertion portion 2 having flexibility, and the insertion
- An operation unit 3 connected to the base end of the unit 2, a suction unit 4 provided at a midway position in the longitudinal direction of the insertion unit 2, and a rotating mechanism 5 that rotatably attaches the suction unit 4 to the insertion unit 2.
- a guide sheath 1 for guiding an endoscope into a body, and as shown in FIG. 1, an elongated cylindrical insertion portion 2 having flexibility, and the insertion
- An operation unit 3 connected to the base end of the unit 2, a suction unit 4 provided at a midway position in the longitudinal direction of the insertion unit 2, and a rotating mechanism 5 that rotatably attaches the suction unit 4 to the insertion unit 2.
- the insertion portion 2 includes a bending portion 2a that can be bent at the distal end portion, and the distal end surface can be directed in an arbitrary direction by the bending of the bending portion 2a.
- the insertion part 2 has the channel 6 and the suction pipe 7 which were formed in parallel with each other along the longitudinal direction, as FIG. 2 shows.
- the channel 6 is a space for inserting an endoscope, and penetrates from the distal end surface to the proximal end surface of the insertion portion 2, and further passes through the inside of the operation portion 3 and an introduction port 3 a provided in the operation portion 3.
- the suction tube 7 communicates the opening 8 provided in the insertion portion 2 and the suction port 3 b provided in the operation portion 3.
- the opening 8 opens in the radial direction on the outer peripheral surface of the insertion portion 2 on the proximal end side with respect to the curved portion 2a.
- the suction portion 4 includes an annular rotating ring 9 and a ring-shaped pad 10 attached to one end portion in the central axis direction of the rotating ring 9. Yes.
- the rotating ring 9 has an inner diameter that is larger than the inner diameter of the opening 8.
- the pad 10 is made of, for example, an elastic material such as silicone rubber, and is attached to the end portion so as to cover the end portion of the rotating ring 9 positioned radially outward with respect to the insertion portion 2.
- the rotation mechanism 5 includes an annular fixing ring 11.
- One end of the fixing ring 11 in the central axis direction is fitted in the opening 8 and is fixed to the inner peripheral surface of the opening 8.
- the other end of the fixing ring 11 protrudes from the opening 8 to the outside of the insertion portion 2 in the radial direction of the insertion portion 2, and protrudes outward in the radial direction on the outer peripheral surface and can be inserted into the recess 9 a.
- a flange-like convex portion 11a is provided.
- the rotating ring 9 having the concave portion 9a constitutes a female snap
- the fixing ring 11 having the convex portion 11a constitutes a male snap
- the convex portion 11a is fitted into the concave portion 9a in a snap-fit manner.
- the rotating ring 9 and the fixed ring 11 are connected coaxially and are relatively rotatable about the central axis A by allowing the convex portion 11a to move in the circumferential direction within the concave portion 9a.
- the space formed inside the pad 10 constitutes a suction port 4 a that communicates with the opening 8 in the radial direction of the insertion portion 2.
- a negative pressure is generated in the suction port 4a and the object is adsorbed to the suction port 4a.
- the suction port 4a is sealed by the surface of the object, so that the object is firmly adsorbed.
- the insertion portion 2 of the guide sheath 1 with the suction device 12 stopped. Is inserted into the pericardial space Z through the pericardium Y from the lower surface of the xiphoid process, and the insertion portion 2 is inserted until the distal end of the insertion portion 2 turns around to the opposite side of the heart X.
- the suction device 12 is operated to generate a negative pressure at the suction port 4 a so that the surface of the heart X is adsorbed to the adsorbing unit 4.
- the midway position of the insertion part 2 in the longitudinal direction is fixed to the heart X.
- the position of the insertion portion 2 with respect to the heart X is fixed in the radial direction at the penetration portion of the pericardium Y, and fixed in the longitudinal direction and the radial direction at the suction portion 4.
- the insertion portion 2 when the insertion portion 2 is pushed in with the adsorption portion 4 adsorbed on the surface of the heart X, as shown in FIG. 3B, the insertion portion 2 causes the perforation portion of the pericardium Y and the adsorption portion 4 to move. It moves to fulcrum S1, S2. That is, the insertion portion 2 is curved between the fulcrum S1 and the fulcrum S2. At this time, at the fulcrum S2, the adsorbing part 4 and the insertion part 2 are rotatable about an axis line in a substantially normal direction of the surface of the heart X.
- the distal end portion of the insertion portion 2 with respect to the fulcrum S2 rotates and moves along the surface of the heart X around the fulcrum S2 by the elastic restoring force of the insertion portion 2 that attempts to return to a substantially linear shape.
- the part located in the pericardial cavity Z of the insertion part 2 is curved in a substantially C shape as a whole, and the distal end of the insertion part 2 also rotates along a substantially arc-shaped locus centering on the fulcrum S1.
- the distal end portion of the insertion portion 2 When the insertion portion 2 is further pushed in from the state shown in FIG. 3B, the distal end portion of the insertion portion 2 further rotates around the fulcrum S2, and the portion of the insertion portion 2 located in the pericardial space Z becomes curved in a substantially U shape with a larger curvature as a whole, and the distal end of the insertion portion 2 further rotates.
- FIG. 3C shows, the front-end
- the bending portion 2a is bent, thereby finely positioning the distal end of the insertion portion 2 with respect to the treatment site.
- the endoscope into the pericardial space Z through the guide sheath 1, the treatment site of the heart X can be observed and treated with the endoscope.
- the pericardium of the insertion portion 2 is pushed by pushing the insertion portion 2 in a state where the suction portion 4 provided in the middle position in the longitudinal direction of the insertion portion 2 is fixed to the surface of the heart X.
- the entire portion located in the cavity Z is greatly curved, and the distal end of the insertion portion 2 is rotationally moved along the surface of the heart X with the suction portion 4 as a rotation center.
- the moving position of the distal end of the insertion portion 2 at this time can be easily controlled by changing the fixing position of the suction portion 4 to the heart X and the pushing amount of the insertion portion 2. Accordingly, there is an advantage that the distal end of the insertion portion 2 can be easily approached to a wide range of arbitrary positions on the surface of the heart X, including the position where the conventional approach is difficult, such as the apex.
- a counterbore-shaped recess 13 is formed around the opening 8 on the outer peripheral surface of the insertion portion 2, and a part of the rotating ring 9 is in the recess 13. It may be accommodated. By doing in this way, the protrusion amount of the rotation ring 9 from the outer peripheral surface of the insertion part 2 can be made small.
- a ball bearing 14 may be provided between the fixed ring 11 and the rotating ring 9 as shown in FIG. By doing in this way, the rotational motion of the rotating ring 9 with respect to the fixed ring 11 can be made smoother.
- the guide sheath 1 was demonstrated as a medical device, it may replace with this and you may provide the adsorption
- the configuration of the suction portion 4, the rotation mechanism 5, the suction tube 7 and the opening portion 8 in FIG. 1 may be applied to the insertion portion of the endoscope as it is.
- a member such as a PTFE tube may be used as the suction tube 7.
- Reference numeral 15 denotes a joint pipe that connects the rotary ring 9 and the suction pipe 7, and a part of the joint pipe 15 constitutes the fixing ring 11 described above.
- the entire insertion portion 2 is bent along with the insertion of the endoscope. Since the rigidity changes, the insertion portion 2 can rotate around the fulcrum S2.
- the suction part 4 and the rotation mechanism 5 are provided in the insertion part of the endoscope, the distal end of the insertion part of the endoscope can be directly positioned with respect to a desired part of the heart X. Such inconvenience does not occur.
- a back-and-forth movement mechanism that moves the suction portion 4 and the rotation mechanism 5 in the longitudinal direction of the insertion portion 2 may be provided.
- a back-and-forth movement mechanism for example, as shown in FIG. 7, a longitudinal groove 16 is formed on the outer peripheral surface of the insertion portion 2, and the suction portion 4 and the rotation mechanism 5 move linearly integrally along the groove 16.
- Positioning of the suction part 4 and the rotation mechanism 5 in the groove 16 can be performed by the operation part 3. By doing in this way, the position of the fulcrum S2 when rotating the insertion part 2 in the pericardial cavity Z can be arbitrarily changed, and the approachable range of the distal end of the insertion part 2 can be further expanded. it can.
- a rotational movement mechanism that moves the suction portion 4 and the rotation mechanism 5 in the circumferential direction of the insertion portion 2 may be provided.
- the insertion section 2 includes a cylindrical main body 21 and a cylindrical rotary tube 22 attached to the outer side of the main body 21 so as to be rotatable about the longitudinal axis.
- the suction tube 7, the suction unit 4, and the rotation mechanism 5 are provided at 22.
- the rotational movement mechanism is composed of a rotary tube 22.
- the entire insertion part 2 is not twisted and rotated, but only the rotary tube 22 is rotated with respect to the main body 21. Therefore, the operation can be simplified. Further, by rotating the rotary tube 22 while the main body 21 is stationary, the tissue to be adsorbed by the adsorption unit 4 can be easily changed between the heart X and the pericardium Y. Furthermore, the main body 21 can be rotated around the longitudinal axis inside the rotary tube 22 in a state where the heart X or the pericardium Y is adsorbed to the adsorbing portion 4, and the usability can be improved.
- the rotary tube 22 may be a single unit and may constitute a cover sheath that can be attached to and detached from the insertion portion 2.
- a cover sheath By attaching a cover sheath to a medical device such as a general-purpose guide sheath 1 or an endoscope, the general-purpose medical device can be operated as shown in FIGS. 3A to 3C.
- a plurality of sets of suction portions 4 and rotation mechanisms 5 may be provided at intervals in the circumferential direction of the insertion portion 2.
- two sets of the suction portion 4 and the rotation mechanism 5 are provided on the rotary tube 22 symmetrically with respect to the longitudinal axis of the insertion portion 2.
- the rotating ring 9 may be elliptical as shown in FIGS. 10A and 10B. By doing so, the suction area of the rotating ring 9 can be enlarged, and the suction part 4 can be fixed to the heart X or the pericardium Y with a stronger suction force.
- the rotation ring 9 is arranged so that the longitudinal axis thereof is along the longitudinal direction of the insertion portion 2, thereby preventing the rotation ring 9 from obstructing the operation of the insertion portion 2. can do.
- the rotating ring 9 may be provided directly on the outer peripheral surface of the insertion portion 2.
- an annular groove (rotation mechanism) 17 formed around the opening 8 is provided on the outer peripheral surface of the insertion portion 2, and the rotation ring 9 is disposed in the groove 17. It is inserted rotatably in the circumferential direction.
- One end of the rotating ring 9 in the central axis direction protrudes from the groove 17 and can contact the tissue.
- a lubricating oil having high biocompatibility such as silicone oil is applied between the outer peripheral surface of the rotating ring 9 and the inner peripheral surface of the groove 17 so that the rotating ring 9 rotates smoothly in the groove 17. It is preferable that
- a measuring instrument 18 for measuring the amount of insertion into the pericardial space Z of the insertion portion 2 of the medical device, for example, the endoscope 1, is provided.
- the measuring tool 18 includes a sheath 18a that can be inserted percutaneously into the pericardial cavity Z, and a measuring unit 18b connected to the proximal end of the sheath 18a.
- the measurement unit 18b is a cylindrical container that is formed of a transparent material and communicates with the inside of the sheath 18a.
- the endoscope 1 in which the insertion unit 2 is inserted into the body through the inside of the measurement unit 18b and the sheath 18a.
- the operation unit 3 is accommodated.
- the measuring unit 18b is provided with a scale, and the insertion amount of the operation unit 3 with respect to the measuring unit 18b can be quantitatively detected based on the scale.
- a scale is also provided in the longitudinal direction on the outer peripheral surface of the sheath 18a, and the amount of sheath insertion into the living body can be quantitatively detected based on the scale.
- the sheath 18a has higher rigidity than the insertion portion 2. Accordingly, when the insertion portion 2 of the endoscope 1 is protruded from the distal end of the sheath 18a inserted into the pericardial cavity Z, and the insertion portion 2 of the endoscope 1 is bent in the same manner as in FIGS. 3A to 3C.
- the insertion portion 2 is curved with the distal end of the sheath 18a as a fulcrum S1 instead of the pericardium Y penetrating portion. Therefore, the distal end position of the insertion portion 2 is controlled not only by the insertion amount of the insertion portion 2 into the pericardial space Z but also by the insertion amount of the sheath 18a into the pericardial space Z. Can be operated.
- the distal end position of the insertion portion 2 inserted into the pericardial space Z may be the same every time. preferable. Therefore, the amount of insertion of the sheath 18a into the body surface W and the amount of insertion of the insertion portion 2 into the sheath 18a are recorded quantitatively. Then, when the insertion portion 2 is next inserted into the pericardial space Z, the insertion amount of the sheath 18a with respect to the body surface W and the insertion amount of the insertion portion 2 with respect to the sheath 18a are in accordance with the recorded values. Thus, by disposing the sheath 18a and the insertion portion 2, the distal end of the insertion portion 2 can be disposed at the same position in the pericardial space Z as in the previous time.
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Abstract
Description
本発明の一態様は、生体内に挿入可能な可撓性を有する細長い挿入部と、該挿入部の長手方向の途中位置において前記挿入部の外周面に設けられ、前記挿入部に対して径方向の外側において該径方向に開口して前記生体内の組織を吸着する吸引口を有する吸着部と、該吸着部を前記径方向と略同一方向の軸線回りに回転自在に前記挿入部に取り付ける回転機構とを備える医療機器である。
このようにすることで、挿入部に固定された固定リングに対して回転リングをスナップフィット式に簡単に連結することができる。互いに連結された固定リングおよび回転リングは、凹部内における凸部の回転移動によって相対回転自在となる。
このようにすることで、湾曲部の湾曲動作によって挿入部の先端の心臓に対する位置を微調整することができる。
このようにすることで、挿入部に対して吸着部を周方向に回転移動させることで、挿入部全体を長手軸回りに回転させずとも、吸引口が心臓または心膜に対向する位置に吸着部の位置を挿入部の周方向に調整することができる。
このようにすることで、挿入部に対して吸着部を長手方向に直線移動させて心臓または心膜に対する挿入部の固定位置を変更することで、吸着部を中心に挿入部を回転移動させたときの挿入部の先端の可動範囲を変更することができる。
このようにすることで、内視鏡を吸着部によって直接心臓または心臓に対して固定することができ、内視鏡の先端を心臓表面の所望の位置に正確に位置決めすることができる。
このようにすることで、ガイドシースを介して内視鏡や処置具等の医療機器の心膜腔内への挿入と抜去とを繰り返す場合に、医療機器の挿入部の先端を心膜腔内の略同一位置に毎回案内することができる。
このようにすることで、汎用の内視鏡や処置具等の医療機器の挿入部にカバーシースを取り付けることによって、汎用の医療機器にも本発明を適用することができる。
本実施形態に係る医療機器は、内視鏡を体内に案内するためのガイドシース1であって、図1に示されるように、可撓性を有する細長い円筒状の挿入部2と、該挿入部2の基端に接続された操作部3と、挿入部2の長手方向の途中位置に設けられた吸着部4と、該吸着部4を挿入部2に回転自在に取り付ける回転機構5とを備えている。
また、挿入部2は、図2に示されるように、長手方向に沿って互いに並列に形成されたチャネル6と吸引管7とを有している。チャネル6は、内視鏡を挿入するための空間であり、挿入部2の先端面から基端面まで貫通し、さらに操作部3の内部を通って該操作部3に設けられた導入口3aと連通している。吸引管7は、挿入部2に設けられた開口部8と、操作部3に設けられた吸引ポート3bとを連通している。開口部8は、湾曲部2aよりも基端側において挿入部2の外周面に半径方向に開口している。
回転リング9は、開口部8の内径寸法よりも大きな内径寸法を有している。回転リング9の内周面には、周方向に全周にわたって形成された凹部9aが設けられている。
パッド10は、例えば、シリコーンゴムのような弾性材料から形成されており、挿入部2に対して半径方向外側に位置する回転リング9の端部を覆うように該端部に取り付けられている。
本実施形態に係るガイドシース1を用いて心臓Xを内視鏡で観察および処置するためには、図3Aに示されるように、吸引装置12を停止した状態で、ガイドシース1の挿入部2を剣状突起の下部の体表から心膜Yを貫通して心膜腔Z内に導入し、挿入部2の先端が心臓Xの反対側に回り込む位置まで挿入部2を挿入する。次に、吸引装置12の作動によって吸引口4aに負圧を発生させて心臓X表面を吸着部4に吸着させる。これにより、挿入部2の長手方向の途中位置が心臓Xに固定される。この状態において、挿入部2の心臓Xに対する位置は、心膜Yの貫通部においては径方向に固定され、吸着部4においては長手方向および径方向に固定される。
次に、ガイドシース1内を介して内視鏡を心膜腔Z内へ挿入することによって、心臓Xの処置部位を内視鏡で観察および処置することができる。
このようにすることで、挿入部2の外周面からの回転リング9の突出量を小さくすることができる。
このようにすることで、固定リング11に対する回転リング9の回転運動をより滑らかにすることができる。
この場合、図1の吸着部4、回転機構5、吸引管7および開口部8の構成をそのまま内視鏡の挿入部に適用すればよい。あるいは、図6に示されるように、吸引管7として、PTFEチューブのような部材を使用してもよい。符号15は、回転リング9と吸引管7とを接続する継手管であり、該継手管15の一部分が、上述した固定リング11を構成している。
前後移動機構としては、例えば、図7に示されるように、挿入部2の外周面に長手方向の溝16が形成され、吸着部4および回転機構5が溝16に沿って一体的に直線移動可能に設けられる。溝16内における吸着部4および回転機構5の位置決めは、操作部3において操作可能になっている。
このようにすることで、心膜腔Z内で挿入部2を回転移動させる際の支点S2の位置を任意に変更することができ、挿入部2の先端のアプローチ可能な範囲をさらに広げることができる。
この場合、挿入部2は、円筒状の本体21と、該本体21の外側に、該本体に対して長手軸回りに回転可能に取り付けられた円筒状の回転管22とを備え、該回転管22に吸引管7、吸着部4および回転機構5が設けられる。回転移動機構は、回転管22から構成される。
このようにすることで、一方の吸着部4に心臓Xを、他方の吸着部4に心膜Yを、同時に吸着させることができ、挿入部2の固定力を増強することができる。
この場合、固定リング11に代えて、挿入部2の外周面には、開口部8の周囲に形成された円環状の溝(回転機構)17が設けられ、該溝17内に回転リング9が周方向に回転自在に挿入される。回転リング9は、中心軸方向の一方の端部が溝17から突出しており、組織と接触可能となっている。回転リング9が溝17内で滑らかに回転するように、回転リング9の外周面と溝17の内周面との間には、シリコーンオイルのような、高い生体適合性を有する潤滑油が塗布されていることが好ましい。
測定具18は、心膜腔Z内へ経皮的に挿入可能なシース18aと、該シース18aの基端に接続された測定部18bとを備えている。測定部18bは、透明な材料から形成され、シース18aの内部と連通するシリンダ状の容器であり、測定部18bおよびシース18aの内部を介して体内に挿入部2が挿入された内視鏡1の操作部3を収容するようになっている。
2 挿入部
2a 湾曲部
3 操作部
4 吸着部
4a 吸引口
5 回転機構
6 チャネル
7 吸引管
8 開口部
9 回転リング
9a 凹部
10 パッド
11 固定リング
11a 凸部
12 吸引装置
13 凹部
14 ボールベアリング
15 継手管
16 溝(前後移動機構)
17 溝
18 測定具
21 本体
22 回転管(回転移動機構)
Claims (8)
- 生体内に挿入可能な可撓性を有する細長い挿入部と、
該挿入部の長手方向の途中位置において前記挿入部の外周面に設けられ、前記挿入部に対して径方向の外側において該径方向に開口して前記生体内の組織を吸着する吸引口を有する吸着部と、
該吸着部を前記径方向と略同一方向の軸線回りに回転自在に前記挿入部に取り付ける回転機構とを備える医療機器。 - 前記回転機構が、前記挿入部に対して固定された円環状の固定リングを備え、
前記吸着部が、前記固定リングと同軸に配置された円環状の回転リングを備え、
前記固定リングおよび前記回転リングのうちの一方が、内周面または外周面に周方向に延びる円環状の凹部を有し、
前記固定リングおよび前記回転リングのうちの他方が、外周面または内周面に前記凹部内にスナップフィット式に嵌め込まれる凸部を有する請求項1に記載の医療機器。 - 前記挿入部が、前記吸着部よりも先端側に湾曲可能な湾曲部を有する請求項1または請求項2に記載の医療機器。
- 前記吸着部の位置を前記挿入部に対して該挿入部の周方向に移動させる回転移動機構を備える請求項1から請求項3のいずれかに記載の医療機器。
- 前記吸着部の位置を前記挿入部に対して該挿入部の長手方向に移動させる前後移動機構を備える請求項1から請求項4のいずれかに記載の医療機器。
- 内視鏡である請求項1から請求項5のいずれかに記載の医療機器。
- 他の医療機器を挿入可能な筒状のガイドシースである請求項1から請求項5のいずれかに記載の医療機器。
- 他の医療機器の挿入部の外周面に着脱可能な筒状のカバーシースである請求項1から請求項5のいずれかに記載の医療機器。
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CN201480081400.8A CN106659488A (zh) | 2014-11-18 | 2014-11-18 | 医疗设备 |
DE112014007012.2T DE112014007012T5 (de) | 2014-11-18 | 2014-11-18 | Medizinisches Instrument |
PCT/JP2014/080495 WO2016079803A1 (ja) | 2014-11-18 | 2014-11-18 | 医療機器 |
JP2016559721A JP6449324B2 (ja) | 2014-11-18 | 2014-11-18 | 医療機器 |
US15/457,247 US20170181608A1 (en) | 2014-11-18 | 2017-03-13 | Medical instrument |
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PCT/JP2014/080495 WO2016079803A1 (ja) | 2014-11-18 | 2014-11-18 | 医療機器 |
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US15/457,247 Continuation US20170181608A1 (en) | 2014-11-18 | 2017-03-13 | Medical instrument |
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US (1) | US20170181608A1 (ja) |
JP (1) | JP6449324B2 (ja) |
CN (1) | CN106659488A (ja) |
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WO (1) | WO2016079803A1 (ja) |
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CN112244948B (zh) * | 2020-09-10 | 2022-06-21 | 杭州德柯医疗科技有限公司 | 介入器械 |
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US6858014B2 (en) * | 2002-04-05 | 2005-02-22 | Scimed Life Systems, Inc. | Multiple biopsy device |
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JP5580540B2 (ja) * | 2009-03-02 | 2014-08-27 | オリンパス株式会社 | ガイドデバイス |
JP5567840B2 (ja) * | 2009-09-22 | 2014-08-06 | オリンパス株式会社 | 細胞注入デバイス |
CN202843563U (zh) * | 2011-07-21 | 2013-04-03 | 富士胶片株式会社 | 栓体及内窥镜 |
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2014
- 2014-11-18 JP JP2016559721A patent/JP6449324B2/ja active Active
- 2014-11-18 WO PCT/JP2014/080495 patent/WO2016079803A1/ja active Application Filing
- 2014-11-18 CN CN201480081400.8A patent/CN106659488A/zh active Pending
- 2014-11-18 DE DE112014007012.2T patent/DE112014007012T5/de not_active Withdrawn
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2017
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JPH08194170A (ja) * | 1995-01-13 | 1996-07-30 | Olympus Optical Co Ltd | 立体視内視鏡 |
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US20170181608A1 (en) | 2017-06-29 |
CN106659488A (zh) | 2017-05-10 |
JPWO2016079803A1 (ja) | 2017-09-21 |
JP6449324B2 (ja) | 2019-01-09 |
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