WO2013111435A1 - 涙道チューブ - Google Patents
涙道チューブ Download PDFInfo
- Publication number
- WO2013111435A1 WO2013111435A1 PCT/JP2012/080180 JP2012080180W WO2013111435A1 WO 2013111435 A1 WO2013111435 A1 WO 2013111435A1 JP 2012080180 W JP2012080180 W JP 2012080180W WO 2013111435 A1 WO2013111435 A1 WO 2013111435A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tube
- lacrimal
- stopper
- wall surface
- opening
- Prior art date
Links
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting in contact-lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/00772—Apparatus for restoration of tear ducts
Definitions
- the present invention relates to a lacrimal tube used for lacrimal passage obstruction treatment.
- lacrimal passage obstruction leading to lacrimation For treatment of lacrimal passage obstruction leading to lacrimation, (i) probing with a lacrimal passage bougie, (ii) placement of an endo lacrimal intubation device, (iii) lacrimal nasal sinus anastomosis (DCR), (iv) lacrimal tubule formation Surgery, (v) nasolacrimal duct arthroplasty, and (vi) lacrimal limb movement.
- DCR lacrimal nasal sinus anastomosis
- DCR lacrimal nasal sinus anastomosis
- lacrimal tubule formation Surgery for treatment of lacrimal passage obstruction leading to lacrimation, (i) probing with a lacrimal passage bougie, (ii) placement of an endo lacrimal intubation device, (iii) lacrimal nasal sinus anastomosis (DCR), (iv) lacrimal tubule formation Surgery, (v) nasolacrimal duct arthroplasty
- the probing by the lacrimal passage bougie (i) described above is to open the occlusion site by inserting a tubule called a bougie into the lacrimal passage and reconstruct the tear fluid flow path. Because it is easy and minimally invasive, it is often performed as the first treatment.
- (v) nasolacrimal duct surgery (vi) lacrimal mobilization is highly effective, but an incision in the face or bone Since the holes are perforated, the degree of invasiveness is relatively high, and it is performed as a last resort.
- the (i) lacrimal intubation device (such as lacrimal tube) used in the placement of the lacrimal intubation device is intended to maintain the flow path and rebuild the tissue after probing with the lacrimal bougie (i). Is to be detained. Indwelling the lacrimal canal intubation device (ii) is easy, minimally invasive, and highly effective compared with the treatment methods (iii) to (vi) described above, and is widely used all over the world. Among them, as shown in Patent Document 1, a so-called nunchaku-type lacrimal duct tube (see, for example, FIG. 1) in which the central portion of the tube is formed of a thin and soft tube or rod and both sides thereof are formed of a hard and thick tube. Is widely spread.
- the nunchaku lacrimal tube consists of a tube and a pair of bougies inserted from the cuts on both sides of the tube.
- the bougie is operated to guide the tube into the lacrimal tract and place it.
- the lacrimal passage is formed from the punctum (21, 22), the lacrimal duct (23, 24), the total lacrimal duct (25), the lacrimal sac (26), the nasolacrimal duct (27), etc. It has become.
- a nunchaku lacrimal tube is inserted into the lacrimal passage.
- the tube as shown in Patent Document 1 has a blind end structure, and lacrimal fluid or drug solution for confirming water flow at the time of medical examination is not collected and discharged in the lacrimal tube. There was a problem.
- the operation in the lacrimal passage must be performed in a groping state, and the bougie is blindly operated. Other than that, a hole was made (temporary path), and the treatment result was poor.
- Patent Document 2 discloses a lacrimal canal intubation device having an open end so that tears, chemicals, and the like can be discharged. .
- the lacrimal canal intubation device can guide the tube into the lacrimal passage while inserting the lacrimal endoscope into the tube instead of the bougie and visually confirming the situation inside the lacrimal passage.
- the reinforcing body By arranging the reinforcing body having such a structure, it can be expected to prevent the bougie and the lacrimal endoscope from protruding from the tube tip, but the end face of the reinforcing body is flat, and the bougie etc. Since the tip is easy to slide on the end face of the reinforcement, the tip of a bougie or the like will not move when an excessive force is applied when bending the lacrimal tube or guiding it into the closed lacrimal passage. There was concern that the lacrimal tract might be damaged or a temporary path could be formed by skidding on the end face of the reinforcement and the tip of a bougie or the like breaking through the side of the tube.
- the object of the present invention is to prevent the distal end of an insertion aid such as a bougie or an endoscope from protruding from the opening at the distal end of the tube even if the distal end is open.
- Another object of the present invention is to provide a lacrimal tube that is less likely to cause the tip of an insertion aid such as a bougie or an endoscope to break through the side of the tube when inserted into the lacrimal passage.
- an insertion aid such as a bougie or an endoscope in the vicinity of the opening of the lacrimal duct tube including the tube having the opening. It has been found that the above-mentioned problem can be solved by interpolating the stopper portion provided with the wall surface into the tube, and the present invention has been completed.
- the gist of the present invention is as follows.
- a lacrimal duct tube that is indwelled in the lacrimal passage and has an integral tube through which an insertion aid can be detachably inserted, and an opening is formed at the end of the tube, and in the vicinity of the opening
- a stopper part for stopping the insertion assisting tool is inserted in the tube.
- the stopper part is open at both ends in the axial direction of the tube and guides the insertion assisting tool.
- a lacrimal duct tube characterized by having a cylindrical structure with an inner wall surface to be stopped.
- the lacrimal tube of the present invention when the lacrimal tube is inserted into the lacrimal passage using the insertion assisting device, the distal end portion of the insertion assisting device is guided to the stopper of the cylindrical structure of the lacrimal tube, By being stopped, the insertion aid does not slide significantly when it comes into contact with the stopper, and the insertion aid can effectively protrude from the tip of the lacrimal tube or break through the side of the tube. It becomes possible to reduce.
- the lacrimal passage referred to in the present invention is the upper / lower punctum (21/22), upper / lower lacrimal duct (23/24), total lacrimal duct (25), lacrimal sac (26) , Lacrimal duct (27), nasal canal (not shown), Hasner's valve (not shown), and lacrimal fluid produced from the lacrimal gland (not shown) is transferred from the ocular surface to the lower nasal passage (28 ) Is a tube (eyeball appendage) that leads to FIG. 2 schematically shows the anatomical structure of the lacrimal passage.
- the tube leading from the upper punctum (21) to the lower nasal passage (28) through the upper lacrimal canal (23) and the total lacrimal canal (25) is called the upper lacrimal passage.
- the duct leading to the lower nasal passage (28) through the lacrimal canal (24) and the total tear canal (25) is called the lower lacrimal passage.
- the lacrimal tube of the present invention is composed of an integral tube placed in the lacrimal passage. “Integrated” means that there are two tubes inserted in each of the upper / lower lacrimal passages.
- the integral tube means a flexible intubation device having a predetermined length to be inserted for the purpose of reconstruction treatment of the lacrimal passage.
- ⁇ Openings are formed at both ends of the integral tube. Thus, since the opening is provided in the tube, the visual field from the lacrimal endoscope can be secured and the water flow test can be performed through this opening.
- the structure of the integral tube includes, for example, a cylindrical shape having openings at both ends and having a hollow portion communicating with them.
- Examples of the cylindrical shape include those having a substantially constant inner and outer diameter over the entire length and those having a central portion having a substantially constant small diameter portion.
- each end has an opening on each side, and a hollow portion that communicates with the opening.
- the outer diameter may be substantially constant over the entire length of the integral tube, or the rod-shaped portion at the center may have a substantially constant small diameter portion.
- the central portion has a substantially constant small diameter portion
- the cylindrical shape on both sides is used as a portion to be placed from the lacrimal sac into the nasolacrimal duct.
- a rod shape may be adopted as a portion that is adopted and placed in the punctum from the punctum.
- the lacrimal canal intubation device having such a shape and structure and having a central portion that is more flexible than both sides thereof is referred to as a so-called nunchaku-type lacrimal tube as described above.
- the Nunchaku-type lacrimal duct tube means a lacrimal duct tube named after its shape similar to that of Nunchaku found in Chinese martial arts. It is preferable that the central portion is flexible to such an extent that when it is supported and lifted at the center point in the length direction of the tube, it becomes an inverted U shape.
- the shape of the both ends of the integral tube is not particularly limited, but it is preferably a shape without an edge from the viewpoint of preventing lacrimal passage damage.
- the outer shape of the end portion is not a sharp shape such as a substantially conical shape or a pyramid shape, a shape in which the end surface of the end portion is chamfered, or a round shape, but is not limited thereto. .
- the insertion assisting device in the present invention refers to a device that guides the lacrimal tube into the lacrimal passage while being inserted into the lacrimal passage when the lacrimal tube is inserted into the lacrimal passage, and then removed,
- bougie corresponds to this.
- a lacrimal endoscope is used instead of the bougie.
- Such an endoscope also corresponds to an insertion aid.
- an insertion portion for inserting a bougie or lacrimal endoscope may be provided in the integral tube.
- the aforementioned so-called nunchaku lacrimal duct tube in general, it is often impossible to insert a bougie or lacrimal endoscope into the central portion. Therefore, in order to insert a lacrimal endoscope or the like into the hollow part of the cylindrical part provided on both sides of the central part, it is necessary to provide an insertion part that communicates the outside with the hollow part.
- the insertion portion may be provided on a side wall portion of a cylindrical portion.
- the structure of the insertion portion is not particularly limited, and may be selected as appropriate, such as a small hole or a cut.
- the constituent material (material) of the integral tube is not particularly limited, and examples thereof include, but are not limited to, a resin composition containing silicone, polyurethane, isobutylene copolymer, and alloys thereof.
- the alloy is not particularly limited.
- the isobutylene copolymer (A) and the thermoplastic polyurethane resin (B) can be adjusted by adjusting the ratio with B). The greater the ratio of the thermoplastic polyurethane resin (B), the greater the hardness of the tube.
- the isobutylene copolymer (A) is preferably contained in an amount of 1% by weight or more (that is, the isobutylene copolymer (A) and
- the resin composition for an integral tube used in the present invention may be composed of only the isobutylene copolymer (A) and the thermoplastic polyurethane resin (B), but may be mixed with other components.
- SIBS styrene-isobutylene-styrene block copolymer
- thermoplastic polyurethane resin (B) (hereinafter sometimes referred to as TPU), “Milactolan E385PNAT” manufactured by Japan Miractran, which is an ether-based aromatic cyclic polyurethane, “Tecotan TT1074A” manufactured by Lubrizol, or an ether-based alicyclic ring “Tecoflex EG100A” and “Tecoflex EG85A” manufactured by Lubrizol, which are polyurethanes of the formula, or “Calbutton PC3575A” manufactured by Lubrizol, which is a polycarbonate-based polyurethane, are preferable.
- a stopper is inserted in the tube in the vicinity of the opening formed at the end of the integral tube. And when the opening part is formed in the both ends of the said integral tube, the said stopper part should just be inserted in the vicinity of at least one of both opening parts. That is, the stopper part may be inserted in the vicinity of one opening part of the integral tube, or may be inserted in the vicinity of the opening parts at both ends.
- the lacrimal tube is placed via only one of the upper / lower lacrimal tubules, or when the upper / lower lacrimal canal is scarred, the lacrimal tube is placed by inserting from the total lacrimal canal
- a stopper may be inserted in the vicinity of one of the openings formed at both ends of the integral tube, and one tear may be passed through both the upper / lower lacrimal tubules.
- the road tube is indwelled, it is preferable to insert a stopper part in the vicinity of the openings formed at both ends of the integral tube.
- the insertion portion for inserting an endoscope or the like may be configured to be inserted from the opening portion on which the stopper portion is not disposed.
- one lacrimal duct tube is combined with the arrangement position of the stoppers described later. It is possible to easily place the tube in the upper / lower lacrimal passage using.
- the shape of the stopper part can be arranged at least in the vicinity of the opening of the integral tube, serves as a stopper for the insertion assisting tool, and has an inner wall surface that guides and stops the insertion assisting tool. It is necessary to have a shape that can. Further, after the stopper part and the tube are arranged substantially coaxially, the stopper part has a cylindrical structure in which both ends in the axial direction (corresponding to the axial direction of the tube) are opened. As a result, it is possible to discharge tear fluid, drug solution, and the like in the tube, and when the endoscope is used as an insertion assisting tool, the visual field of the endoscope can be secured.
- the cylindrical structure of the stopper part is arranged coaxially with the tube, and prevents the insertion assisting tool from protruding from the tip and side wall of the tube when the tube is inserted into the lacrimal passage.
- the structure is such that the tip of the insertion aid can be stopped against the inner wall surface of the structure.
- the structure for this is not particularly limited.
- the width perpendicular to the axial direction of the stopper and the tube continuously decreases as the tube moves from the proximal side to the distal side.
- Such a structure is preferable.
- the contact surface between the stopper and the insertion assisting tool is small, and the width on the base end side is large, so it is relatively easy to remove the insertion assisting tool from the lacrimal duct tube. The effect of becoming can be expected.
- a structure in which a surface perpendicular to the axial direction is reduced in diameter from the proximal side toward the distal side a so-called tapered shape. are preferred.
- the inner wall surface is inclined at a constant angle in the cross section.
- the inner wall surface structure is not limited to this, and the inclination angle of the inner wall surface changes continuously, for example, like a bowl. Then, the diameter may be reduced.
- the stopper part is arranged coaxially with the tube, and the width of the stopper part and the stopper part perpendicular to the axial direction of the tube is provided with a step part that gradually decreases.
- a structure is also desirable. In the case of such a structure, since the inner wall surface up to the stepped portion and the side wall surface of the insertion assisting tool are parallel, the insertion assisting tool guided inside the stopper portion tends to be stable.
- the stepped portion is arranged in the vicinity of the end of the tube, the distance from the stepped portion to the end of the tube can be shortened, so a wider field of view can be obtained when an endoscope is used as an insertion aid. Securement is possible.
- a structure having a step portion on the end side of the tube can be cited.
- the stepped portion of the stopper is arranged on the end side (upper side in the drawing), but is not limited to this, for example, in the intermediate portion with respect to the entire length in the axial direction. It may be located, and other positions may be sufficient.
- the number of step portions is not limited to one, and two or more step portions may be provided.
- the protrusions may be disposed on a part of the inner wall surface in the circumferential direction, or may be disposed on the entire circumference of the inner wall surface.
- the protrusion is not particularly limited as long as it is arranged at a position where the insertion assisting tool can be guided inside the stopper, and may be any position in the axial direction of the tube (the axial direction of the stopper). For example, it may be disposed at the end on the tube end side in the axial direction, may be disposed at an intermediate position with respect to the entire length in the axial direction of the stopper portion, or may be at another position.
- the diameter of the inner wall surface increases as the inner wall surface moves from the proximal side to the distal side at the distal end of the stopper portion in FIG.
- a structure having such a tapered shape is also preferable. This makes it possible to secure a wide field of view of the endoscope when the endoscope is used as an insertion aid.
- the arrangement position of the stopper part is configured to be a predetermined distance from the opening (the most distal end of the opening) in the vicinity of the opening at the end of the tube.
- the predetermined distance is determined from the viewpoint of a role as a stopper for the lacrimal endoscope and securing the visual field of the lacrimal endoscope when the lacrimal endoscope is used as an insertion assisting tool.
- the predetermined distance should be short. Considering the relationship with the outer diameter of the endoscope, the predetermined distance should be less than twice the outer diameter of the endoscope. Is preferred.
- the field of view of the lacrimal endoscope can be affected by the size of the opening (particularly the diameter of the end of the opening), apart from the so-called viewing angle of the lacrimal endoscope.
- the diameter of the opening (also referred to as opening diameter) is preferably as large as possible from the viewpoint of securing the visual field of the lacrimal endoscope.
- opening diameter is preferably as large as possible from the viewpoint of securing the visual field of the lacrimal endoscope.
- the opening diameter is increased, the thickness of the tube at the end is reduced, making it difficult to hold the stopper, and when the tube is inserted into the lacrimal passage using the force applied to the lacrimal endoscope There is a possibility that the stopper part may penetrate through the opening.
- the outer diameter of the tube is 1.1 to 2 in order to hold the stopper and prevent the penetration and secure the visual field of the lacrimal endoscope.
- the diameter of the opening is preferably 0.6 to 1.0 mm, more preferably 0.7 to 0.9 mm.
- an endoscope is not used as an insertion assisting tool, it may be determined in consideration of drainage, water permeability, and the like of tears and chemicals.
- the lacrimal endoscope is secured in the vicinity of the opening at the end of the tube so that the visual field of the lacrimal endoscope is ensured by providing a predetermined distance from the opening.
- the tube can be smoothly inserted into the lacrimal passage using the force related to.
- the risk of penetrating through the lacrimal endoscope from an inadvertent opening can also be reduced by the stopper serving as a stopper.
- Such an effect can be further improved by adjusting the opening diameter of the opening as described above in addition to the distance from the opening.
- the opening process can be performed by post-processing.
- the constituent material of the stopper is not particularly limited, but is preferably a hard material from the viewpoint of guiding and stopping the insertion assisting tool.
- various hard resins and metals such as stainless steel are used. Can be mentioned.
- Stainless steel is preferred from the viewpoint of preventing corrosion due to contact with body fluids and chemicals.
- hydrophilic coating may be provided on the outside of the tube.
- the coating exhibits lubricity when in contact with blood and reduces resistance during insertion.
- the type of hydrophilic coating is not particularly limited, and hydrophilic polymers such as poly (2-hydroxyethyl methacrylate), polyacrylamide, polyvinyl pyrrolidone, and polyethylene glycol, or blends thereof are preferably used.
- FIG. 1 shows an example of a conventional common nunchaku-type lacrimal tube (with a bougie inserted), and FIG. 3 (a) shows the intra lacrimal passage of the present invention. It is sectional drawing which showed typically one Embodiment of the tube part detained in the lower nasal passage etc.
- FIG. 3B is a cross-sectional view of the end portion schematically showing a state in which the lacrimal endoscope is inserted into the hollow portion of the tube portion in the example shown in FIG.
- FIG.3 (c) is sectional drawing which shows typically the other example of the terminal part of a tube part.
- FIG. 3C shows a state in which the lacrimal endoscope is inserted into the hollow portion of the tube portion, as in FIG.
- a conventional nunchaku-type lacrimal tube 1 has a cylindrical or rod-shaped central portion 4 and one end of the central portion 4 that are placed in the punctum, lacrimal tubule, total lacrimal tubule, and lacrimal sac at a substantially central portion. Is connected to the other end of the cylindrical first cylindrical portion 5a and the central portion 4 to be placed in the lacrimal sac, nasolacrimal duct, Hasner's valve, lower nasal passage, It is composed of a sac, a lacrimal duct, Hasner's valve, and a cylindrical second cylindrical portion 5b which is a portion placed in the lower nasal passage.
- the central part 4 is formed thinner than the first cylindrical part 5a and the second cylindrical part 5b, and forms a so-called nunchaku type.
- the first end 6 of the first tubular portion 5a and the second end 8 of the second tubular portion 5b are blind ends, and the tips have a sharp shape. Further, the distal end portion including the first end 6 is colored in order to make it easy for the operator to distinguish from the distal end portion including the second end 8. Further, two marks 9a are attached at predetermined positions from the first end 6 of the first tubular portion 5a so that the operator can visually recognize the insertion depth. Similarly, the second cylindrical portion 5b is also marked with a mark 9b.
- bougie insertion cuts 7a and 7b are arranged on the side walls in the vicinity of the central part 4 of the first cylindrical part 5a and the second cylindrical part 5b, respectively, and insertion aids are inserted through the cuts 7a and 7b.
- the first bougie 2a and the second bougie 2b are inserted through the hollow portions of the first tubular portion 5a and the second tubular portion 5b, respectively.
- the central part 4 is provided with a midpoint 3 at a position that is approximately the center of the nunchaku lacrimal duct tube to facilitate confirmation of the insertion position and the detention position.
- the basic structure of the lacrimal tube according to the present invention is the same as that of the nunchaku lacrimal tube shown in FIG.
- the difference is the structure of the first cylindrical portion 5a and the second cylindrical portion 5b. This difference will be described below. Further, configurations other than the differences, for example, the mark 9a (9b) in FIG. 1 and the coloring of the end portion can also be adopted in the lacrimal duct tube according to the present invention.
- a lacrimal tube that is an embodiment of the present invention is the same as the conventional nunchaku lacrimal tube 1 shown in FIG. 1, instead of the first cylindrical portion 5a and the second cylindrical portion 5b.
- FIG. 3 (a) shows a cross-sectional view of one of the tubular tubes of the integral tube, but the other tube has substantially the same structure. The description is omitted here.
- a distal end portion 33 is provided at the end of the cylindrical portion 35, and in the vicinity of the end opening portion 33.
- a stopper 32 a is inserted in a predetermined position from the end opening 33 so as to be coaxial with the cylindrical portion 35.
- the side wall in the vicinity of the central portion of the cylindrical portion 35 is provided with a cut 34 that communicates the outside with the hollow portion, so that an insertion aid such as a bougie or lacrimal endoscope can be inserted.
- the stopper part 32a has a cylindrical shape with both axial ends open.
- the inner wall surface 37a and the outer wall surface 38a have a structure in which the diameter is continuously reduced toward the end side (upper side in the drawing) of the cylindrical portion 35 so as to have a predetermined constant taper angle.
- an inner wall surface parallel to the axial direction of the cylindrical portion 35 is provided on the end side of the inner wall surface 37a.
- the base end side (the lower side in the figure) of the inner wall surface 37 a may be continuous so as to coincide with the inner wall surface of the cylindrical portion 35.
- a concave portion corresponding to the cylindrical structure of the stopper portion 32a is formed in the vicinity of the terminal opening 33 of the cylindrical portion 35, and the stopper portion 32a is inserted into the concave portion, It is held by the shape part 35.
- the inner diameter of the opening on the terminal side (upper side in the drawing) of the stopper 32a is the same as the inner diameter of the terminal opening 33 of the cylindrical part 35. It may be smaller (not shown).
- the inner diameter of the terminal opening 33 of the cylindrical portion 35 is set to the stop portion 32a. It may be slightly smaller than the inner diameter on the end side.
- the stopper 32b has a cylindrical shape, guides the insertion assisting tool 36 such as a bougie or an endoscope, and stops its tip.
- the inner wall surface 37 b has a predetermined tapered shape in which the diameter is continuously reduced from the base end side (lower side in the figure) toward the distal end side (upper side in the figure).
- the possibility of 36 sliding on the contact surface of the stopper portion and breaking through the side wall of the cylindrical portion 35 can be effectively reduced. Further, since the inner wall surface has a predetermined taper shape, the contact area between the inner wall surface of the stopper part 36 and the insertion assisting tool 36 is relatively small, and the stopper part 36 is removed when the insertion assisting tool 36 is removed. Can be expected to be relatively easy to remove.
- FIG.3 (c) shows the other example of the structure of the stopper part in the lacrimal duct tube 31 which is one Embodiment of this invention.
- the structure of the stopper is different from that in FIG. 3B, but the other configurations are the same.
- the stopper portion 32 c has a cylindrical shape with both axial ends open, and the outer wall surface 38 c is formed in parallel with the axial direction of the cylindrical portion 35.
- the inner wall surface 37c has a diameter smaller than the inner diameter of the first-stage inner wall surface parallel to the axial direction of the cylindrical portion 35 and the inner wall surface of the first step, and is also in the axial direction of the cylindrical portion 35.
- the inner wall surface of the second stage located on the distal side from the first stage and the inner wall surface continuous with these inner wall surfaces and parallel to the axial direction of the cylindrical portion 35 are formed.
- the inner wall surface parallel to the axial direction of the cylindrical portion 35 forms a stepped portion, and the distal end of the insertion assisting tool 36 is brought into contact with and locked on this inner wall surface. Further, the insertion assisting tool 36 is guided to the first inner wall surface.
- the insertion assisting device is used when inserting the lacrimal tube into the lacrimal passage using the insertion assisting device 36.
- the possibility of 36 sliding on the contact surface of the stopper portion and breaking through the side wall of the cylindrical portion 35 can be effectively reduced.
- the stopper part 32c in this example the inner wall surface of the first step up to the step part and the side wall surface of the insertion assisting tool 36 are parallel to each other, so that the guide part 32c is guided inside.
- the inserted insertion aid 36 tends to be stable.
- the step portion is arranged at a position close to the end side of the cylindrical portion 35, the distance from the step portion to the end of the opening portion 33 of the cylindrical portion 35 can be shortened.
- a lacrimal endoscope is used as an auxiliary tool, a wider field of view can be secured. Also in this example, as in the case of FIG.
- the inner diameter of the opening on the terminal side (upper side in the figure) of the stopper 32c matches the inner diameter of the terminal opening 33 of the cylindrical portion 35.
- the inner diameter of the end opening 33 may be made smaller (not shown).
- the stopper part 32 c can be more firmly fixed in the cylindrical part 35, and the stopper part 32 c can be more difficult to penetrate from the end opening 33.
- the inner diameter of the terminal opening 33 of the cylindrical portion 35 is set to the stop portion 32c. It may be slightly smaller than the inner diameter on the end side.
- FIG.3 (d) shows the other example of the structure of the stopper part in the lacrimal duct tube which is one Embodiment of this invention.
- the inner wall surface 37d at the terminal end of the stopper 32d that is continuous from the inner wall surface of the second stage is further increased in diameter from the base end side toward the terminal end side. It has a structure that has such a tapered shape.
- the stepped portion in FIG. 3C is also the stepped portion in the present invention and also a protruding portion.
- the inner diameter of the opening on the terminal side (upper side in the figure) of the stopper 32d is the same as the inner diameter of the terminal opening 33 of the cylindrical portion 35.
- the stopper part 32d is firmly fixed by the cylindrical part 35, and the stopper part 32d is more difficult to penetrate from the terminal opening part 33.
- the inner diameter of 33 may be slightly smaller than the inner diameter of the opening on the terminal side (upper side in the drawing) of the stopper 32d (not shown).
- Lacrimal intubation device (nunchaku lacrimal tube) 2a. 1st bougie 2b. 2nd bougie3. Midpoint 4. Central part 5a. 1st cylindrical part 5b. Second cylindrical portion 6. First end 7. 7. Cut for bougie insertion Second end 21. Upper punctum 22. Lower punctum 23. Upper lacrimal tubule 24. Lower lacrimal tubule 25. Total lacrimal tubule 26. Lacrimal sac 27. Nasolacrimal duct 28. Lower nasal passage 31. Lacrimal duct 32a. Stopping part 32b. Stopping portion 32c. Stopping part 32d. Stopper part 33. Terminal opening 34. Break 35. Cylindrical portion 36. Insertion aid 37a. Inner wall surface 37b. Inner wall surface 37c. Inner wall surface 37d. Inner wall surface 38a. Outer wall surface 38c. Outer wall L. Predetermined distance
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- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Plastic & Reconstructive Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
- Endoscopes (AREA)
Abstract
Description
〔2〕前記当て止め部の内壁面は、前記チューブ軸方向に垂直方向の幅が、前記チューブの末端側に向かって連続的に減少するテーパー部を備える前記〔1〕記載の涙道チューブ。
〔3〕前記当て止め部の内壁面は、前記チューブ軸方向に垂直方向の幅が、前記チューブの末端側に向かって段階的に減少する段差部を備える前記〔1〕記載の涙道チューブ。
〔4〕前記当て止め部の内壁面は、その相対する内壁面へ向かう突起部を備える前記〔1〕記載の涙道チューブ。
本例では、当て止め部32aは、軸方向の両末端が開口した円筒状の形状を有している。また、内壁面37a及び外壁面38aは、筒状部35の末端側(図では上側)に向かって、所定の一定のテーパー角度を有するように連続的に縮径した構造を有している。また、内壁面37aの末端側には筒状部35の軸方向に並行した内壁面を有している。また、内壁面37aの基端側(図の下側)は筒状部35の内壁面と一致するように連続していてもよい。このように、本例では、筒状部35の末端開口部33の近傍に当該当て止め部32aの筒状構造に対応する凹部が形成され、当該凹部に当て止め部32aが内挿され、筒状部35に保持されている。
また、本例では、当て止め部32aの末端側(図の上側)の開口部の内径は、筒状部35の末端開口部33の内径と一致しているが、末端開口部33の内径をより小さくしても良い(図示せず)。このようにすることで、当て止め部32aを筒状部35内により強固に固定することが可能となり、当て止め部32aが末端開口部33からより突き抜けにくくすることができる。但し、挿入補助具として内視鏡を使用する場合は、内視鏡の視野を極力妨げないようにすることが好ましく、例えば、筒状部35の末端開口部33の内径を当て止め部32aの末端側の内径より僅かに小さくするとよい。
本例では、当て止め部32cは、軸方向の両末端が開口した円筒状の形状を有し、外壁面38cは筒状部35の軸方向に並行して形成されている。また、内壁面37cは、筒状部35の軸方向に並行する第1段目の内壁面と、第1段目の内壁面の内径よりも縮径し、同じく筒状部35の軸方向に並行し、第1段目より末端側に位置する第2段目の内壁面と、これらの内壁面に連続し、筒状部35の軸方向に垂直方向に並行する内壁面とからなる。筒状部35の軸方向に垂直方向に並行する内壁面が段差部を形成するとともに、この内壁面に、挿入補助具36の先端が、当接して係止される(当止する)。また、第1段目の内壁面の部分に挿入補助具36が案内される。
このように、挿入補助具36の先端部が円筒状の当て止め部32cの内部に配されているため、挿入補助具36を用いて涙道チューブを涙道内に挿入する際に、挿入補助具36が当て止め部の当接面を横滑りして、筒状部35の側壁を突き破る可能性を効果的に低減することができる。また、本例における当て止め部32cを使用することにより、段差部に至るまでの第1段目の内壁面と挿入補助具36の側壁面とが並行するため、当て止め部32cの内部に案内された挿入補助具36が安定し易い傾向にある。また、段差部が、筒状部35の末端側に近い位置に配されていることから、段差部から筒状部35の開口部33の末端までの距離を短くすることが可能なため、挿入補助具として涙道内視鏡を用いた場合により広い視野の確保が可能となる。
また、本例でも、図3(a)の場合と同様に、当て止め部32cの末端側(図の上側)の開口部の内径は、筒状部35の末端開口部33の内径と一致していても良いし、末端開口部33の内径をより小さくしても良い(図示せず)。後者の場合、当て止め部32cを筒状部35内により強固に固定することが可能となり、当て止め部32cが末端開口部33からより突き抜けにくくすることができる。但し、挿入補助具として内視鏡を使用する場合は、内視鏡の視野を極力妨げないようにすることが好ましく、例えば、筒状部35の末端開口部33の内径を当て止め部32cの末端側の内径より僅かに小さくするとよい。
また、本例では、前述の所定距離の長さLを短くすることにより、挿入補助具として内視鏡を使用した際に、内視鏡のレンズをチューブ末端により近づけることが可能となり、内視鏡の視野をより広く確保することを可能としている。また、本例では、図3(d)に示したように、当て止め部32dの末端側(図の上側)の開口部の内径は、筒状部35の末端開口部33の内径と同じにしてもよいが、前記のように、当て止め部32dが筒状部35により強固に固定され、当て止め部32dが末端開口部33からより突き抜けにくくするために、筒状部35の末端開口部33の内径を当て止め部32dの末端側(図の上側)の開口部の内径より、わずかに小さくしても良い(図示せず)。これにより、挿入補助具として内視鏡用いた場合に、その視野の確保も可能となる。
2a.第1ブジー
2b.第2ブジー
3.中点
4.中央部
5a.第1筒状部
5b.第2筒状部
6.第1末端
7.ブジー挿入用の切れ目
8.第2末端
21.上涙点
22.下涙点
23.上涙小管
24.下涙小管
25.総涙小管
26.涙嚢
27.鼻涙管
28.下鼻道
31.涙道チューブ
32a.当て止め部
32b.当て止め部
32c.当て止め部
32d.当て止め部
33.末端開口部
34.切れ目
35.筒状部
36.挿入補助具
37a.内壁面
37b.内壁面
37c.内壁面
37d.内壁面
38a.外壁面
38c.外壁面
L.所定距離
Claims (4)
- 涙道内に留置され、挿入補助具を着脱可能に挿通可能な一体のチューブを備える涙道チューブであって、前記チューブの末端には末端開口部が形成されており、前記開口部の近傍には、挿入補助具を当止する当て止め部が前記チューブに内挿されており、前記当て止め部は、前記チューブの軸方向の両端が開口し、且つ、挿入補助具を案内して当止する内壁面を備えた筒状構造を有する、ことを特徴とする涙道チューブ。
- 前記当て止め部の内壁面は、前記チューブ軸方向に垂直方向の幅が、前記チューブの末端側に向かって連続的に減少するテーパー部を備える請求項1記載の涙道チューブ。
- 前記当て止め部の内壁面は、前記チューブ軸方向に垂直方向の幅が、前記チューブの末端側に向かって段階的に減少する段差部を備える請求項1記載の涙道チューブ。
- 前記当て止め部の内壁面は、その相対する内壁面へ向かう突起部を備える請求項1記載の涙道チューブ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2013555135A JP5999109B2 (ja) | 2012-01-26 | 2012-11-21 | 涙道チューブ |
EP12866422.4A EP2807993A4 (en) | 2012-01-26 | 2012-11-21 | TUBE FOR LACRYMAL TRACKS |
US14/369,911 US20140364790A1 (en) | 2012-01-26 | 2012-11-21 | Lacrimal duct tube |
KR1020147022465A KR101881191B1 (ko) | 2012-01-26 | 2012-11-21 | 누도 튜브 |
CN201280068028.8A CN104066405A (zh) | 2012-01-26 | 2012-11-21 | 泪道管 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2012-014608 | 2012-01-26 | ||
JP2012014608 | 2012-01-26 |
Publications (1)
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WO2013111435A1 true WO2013111435A1 (ja) | 2013-08-01 |
Family
ID=48873176
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2012/080180 WO2013111435A1 (ja) | 2012-01-26 | 2012-11-21 | 涙道チューブ |
Country Status (6)
Country | Link |
---|---|
US (1) | US20140364790A1 (ja) |
EP (1) | EP2807993A4 (ja) |
JP (1) | JP5999109B2 (ja) |
KR (1) | KR101881191B1 (ja) |
CN (1) | CN104066405A (ja) |
WO (1) | WO2013111435A1 (ja) |
Cited By (3)
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WO2015079999A1 (ja) * | 2013-11-28 | 2015-06-04 | 株式会社カネカ | 涙道チューブ |
JP2019511318A (ja) * | 2016-04-11 | 2019-04-25 | ザ・リージェンツ・オブ・ザ・ユニバーシティ・オブ・ミシガンThe Regents Of The University Of Michigan | 開口部を有する涙道ステント |
CN111920577A (zh) * | 2020-06-03 | 2020-11-13 | 永康市第一人民医院 | 泪道瓣膜探通扩张器械 |
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FR3069433B1 (fr) | 2017-07-25 | 2019-09-06 | France Chirurgie Instrumentation SAS | Sonde bicanaliculaire autostable |
WO2019213360A1 (en) * | 2018-05-02 | 2019-11-07 | Stryker Corporation | Liquid lens auto focus for endoscopic surgery visualization |
JP7286657B2 (ja) * | 2018-08-24 | 2023-06-05 | 株式会社カネカ | 涙道内挿管システム |
US12213916B2 (en) | 2020-01-17 | 2025-02-04 | Quest Medical, Inc. | Nasolacrimal duct stent assembly and method |
CN111419533A (zh) * | 2020-04-03 | 2020-07-17 | 济南晨生医疗科技有限公司 | 一种新型泪道引流管 |
CN111449834B (zh) * | 2020-04-15 | 2022-03-01 | 贵州省人民医院 | 一种泪小管栓塞用泪道引流装置及其引流方法 |
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- 2012-11-21 CN CN201280068028.8A patent/CN104066405A/zh active Pending
- 2012-11-21 US US14/369,911 patent/US20140364790A1/en not_active Abandoned
- 2012-11-21 JP JP2013555135A patent/JP5999109B2/ja active Active
- 2012-11-21 WO PCT/JP2012/080180 patent/WO2013111435A1/ja active Application Filing
- 2012-11-21 EP EP12866422.4A patent/EP2807993A4/en not_active Withdrawn
- 2012-11-21 KR KR1020147022465A patent/KR101881191B1/ko active Active
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Cited By (8)
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WO2015079999A1 (ja) * | 2013-11-28 | 2015-06-04 | 株式会社カネカ | 涙道チューブ |
JPWO2015079999A1 (ja) * | 2013-11-28 | 2017-03-16 | 株式会社カネカ | 涙道チューブ |
US10070991B2 (en) | 2013-11-28 | 2018-09-11 | Kaneka Corporation | Lacrimal duct tube |
JP2019511318A (ja) * | 2016-04-11 | 2019-04-25 | ザ・リージェンツ・オブ・ザ・ユニバーシティ・オブ・ミシガンThe Regents Of The University Of Michigan | 開口部を有する涙道ステント |
JP6992987B2 (ja) | 2016-04-11 | 2022-01-13 | ザ・リージェンツ・オブ・ザ・ユニバーシティ・オブ・ミシガン | 開口部を有する涙道ステント |
JP2022019934A (ja) * | 2016-04-11 | 2022-01-27 | ザ・リージェンツ・オブ・ザ・ユニバーシティ・オブ・ミシガン | 開口部を有する涙道ステント |
CN111920577A (zh) * | 2020-06-03 | 2020-11-13 | 永康市第一人民医院 | 泪道瓣膜探通扩张器械 |
CN111920577B (zh) * | 2020-06-03 | 2022-07-15 | 永康市第一人民医院 | 泪道瓣膜探通扩张器械 |
Also Published As
Publication number | Publication date |
---|---|
KR101881191B1 (ko) | 2018-07-23 |
JPWO2013111435A1 (ja) | 2015-05-11 |
EP2807993A4 (en) | 2015-09-23 |
CN104066405A (zh) | 2014-09-24 |
EP2807993A1 (en) | 2014-12-03 |
JP5999109B2 (ja) | 2016-09-28 |
US20140364790A1 (en) | 2014-12-11 |
KR20140124771A (ko) | 2014-10-27 |
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