JP4517402B2 - Intraocular lens insertion cartridge - Google Patents

Description

  The present invention relates to a cartridge used when an intraocular lens is inserted into an eyeball.

  An intraocular lens has, for example, an optical part and two loops that support the optical part, and is implanted into the eyeball as a substitute for a lens affected by cataract. It is inserted into the eyeball from the wound.

  This incision is preferably larger than the optical part of the intraocular lens from the viewpoint of ease of insertion of the intraocular lens. However, since the patient's recovery is delayed when the incision is large, it has been desired that the incision be as small as possible. Recently, soft materials such as silicone resin, acrylic resin, and hydrogel are used as materials for intraocular lenses, and the intraocular lenses are rolled or folded and inserted into the eyeball from a small incision. Surgery has been performed.

  As a method of folding the soft intraocular lens, an operator may fold the eyepiece with a lever or the like, but a folding instrument is often used.

  For example, as an instrument for folding this intraocular lens, the present applicant has invented a storage container having a soft intraocular lens folding mechanism and has filed an international application (International Application No. PCT / JP02 / 04464, International Publication No. WO02 / 096322). (Patent Document 1). FIG. 6 is a perspective view of the intraocular lens placement portion of the storage container. FIG. 6 shows a state where the front surface of the intraocular lens L is folded outward and the back surface is folded inward in the storage container 21.

  A holding part 23 for holding an intraocular lens is provided on the base 22, and a base part side lens pressing part 25 is provided on the holding part 23. When the lever portion 24 is pressed, the spring portion 26 is deformed and the movable portion side lens pressing portion 27 moves in the direction of the base portion side lens pressing portion 25, so that the movable portion side lens pressing portion 27 and the base portion side are moved. The intraocular lens L held between the lens pressing portion 25 is folded on the front side and the back side.

  By using the storage container 21, the intraocular lens manufactured on the manufacturing line can be stored aseptically and without being damaged until the operation. During surgery, the intraocular lens can be folded with this storage container, and the operator can pick up the folded soft intraocular lens with a lever and insert it directly into the eyeball from the incision.

  As described above, the intraocular lens can be inserted into the eyeball from the incision by the lever. However, the method using the lever requires skill in the operation, such as taking care not to damage the cornea during the insertion.

  On the other hand, as a method for safely and surely inserting an intraocular lens into an eyeball, there is a method using a cartridge for inserting an intraocular lens.

  As this cartridge, for example, there is one described in JP-T-2002-541912 (Patent Document 2), and this cartridge has a structure as shown in FIG.

  Reference numeral 31 denotes a cartridge, which has an introduction tube 32, a discharge port portion 34, and blades 36 and 37.

  The introduction tube 32 has an insertion port 33 for inserting an intraocular lens, from which the intraocular lens is inserted. A discharge port portion 34 is provided at the tip of the introduction pipe 32.

  Further, blades 36 and 37 are provided near the middle of the introduction pipe 32. The blades 36 and 37 are for mounting the cartridge 31 on the tip of an injector (not shown), and the cartridge 21 and the injector are integrated by holding the blades 36 and 37 with a holding portion of the injector.

  In addition, in the insertion port portion 33 of the introduction pipe 32 indicated by a broken line, the cross-sectional shape is such that one side surface 38a of the cross section has an arc shape, and the other side surface 38b has a flat shape in which straight lines and arcs are combined. It is asymmetric. The cross section of the intraocular lens introduction tube 32 in the direction orthogonal to the longitudinal direction is a flat shape having a major axis and a minor axis that are substantially perpendicular to each other at the center thereof. When the horizontal axis and the vertical axis are respectively used, the horizontal axis is longer than the vertical axis.

  Further, as the inside of the introduction pipe 32 approaches the discharge port portion 34, in the internal cross section of the introduction pipe 32, the vertical axis and the horizontal axis are both shortened although their ratios are shortened, and the cross-sectional shape of the introduction pipe 32 is circular. In the vicinity of the discharge port 34, the cross-sectional shape is substantially circular.

  With such an internal structure of the introduction tube 32, the intraocular lens inserted without being folded from the insertion port portion 33 of the introduction tube 32 is gradually rounded so that the optical part is inside.

  In particular, one side of the intraocular lens can be folded slowly due to the asymmetric structure.

International Publication No. WO02 / 096322 As a method for safely and surely inserting an intraocular lens into an eyeball, for example, it is conceivable to use a cartridge as described in Patent Document 2, but the lens is opened. Therefore, a long distance is required from the insertion port to the discharge port, and a large amount of thickening material such as hyaluronic acid to be filled in the cartridge before loading the lens is required.

  Therefore, the present inventor reduced the distance required for folding with the cross-sectional area of the insertion port and the introduction tube, and in order to facilitate the setting of the lens in the insertion port, the shape of the insertion port was changed to the lens. In addition to an elliptical shape that can be folded in half, both the horizontal axis and the vertical axis of the cross section perpendicular to the longitudinal axis direction of the lens introduction tube are introduced so that the length gradually decreases from the insertion port to the discharge port. The inside of the tube was designed. Using the cartridge thus designed, the intraocular lens was set in the insertion port, mounted on the injector, and the intraocular lens in the cartridge was pushed out by pushing the push rod of the injector. However, it has become difficult to move the intraocular lens in the middle of the introduction tube, causing a problem that the intraocular lens cannot be pushed out from the discharge port.

  Therefore, the present inventor considered that the force applied to the intraocular lens may be non-uniform as a cause of the difficulty of movement, and paid attention to the stress.

  Since the intraocular lens is inserted in a state where it is folded into the insertion opening, a force acts strongly in the vertical direction of the insertion opening and the introduction tube to open in the insertion opening and the introduction tube. When the intraocular lens is pushed out in this state, both the vertical axis and the horizontal axis are shortened in the introduction tube, so that a lateral force is gradually applied to the intraocular lens, thereby causing the intraocular lens to exert a lateral force. In response to the deformation, the stress in the vertical direction increases.

  If this happens, the stress in the vertical direction is greater than the stress in the horizontal direction, and force is applied to the intraocular lens non-uniformly, especially the stress concentrates at the root of the loop of the intraocular lens, and the intraocular lens moves while curling. I found it difficult.

  Therefore, in order to solve the above-mentioned problems, the present invention makes it possible to smoothly move the inside of the introduction tube of the cartridge so that the force is not applied unevenly to the folded intraocular lens, and to easily roll it into the eyeball. An intraocular lens cartridge that can be inserted is provided.

  The cartridge for inserting an intraocular lens according to claim 1 is a cartridge for inserting an intraocular lens having a substantially cylindrical intraocular lens introducing tube for introducing an intraocular lens, wherein the intraocular lens introducing tube is the intraocular lens. An insertion port portion for inserting a lens and a discharge port portion for discharging the intraocular lens, and a cross section of the insertion port portion in a direction perpendicular to the longitudinal direction of the intraocular lens introduction tube is A flat shape having a major axis and a minor axis that are substantially orthogonal to each other at the center, and when the major axis and the minor axis are a horizontal axis and a vertical axis, respectively, The axis is longer than the vertical axis, the vertical axis is longer than the horizontal axis in the cross section of the intermediate portion of the introduction pipe, the vertical axis and the horizontal axis are substantially equal in the cross section of the discharge port portion of the introduction pipe, and the insertion The horizontal axis shortens from the mouth to the middle The continuously changed, and is characterized in that the longitudinal axis toward the outlet portion from the middle portion is continuously changed to be shorter.

  According to the first aspect of the present invention, the intraocular lens can be easily rounded without increasing the vertical force applied to the intraocular lens folded from the insertion port to the intermediate part, and thereafter A vertical force is applied from the portion to the discharge port portion to further round it, and the intraocular lens can be easily pushed out from the discharge port portion.

  The invention of the cartridge for inserting an intraocular lens according to claim 2 is the cartridge for inserting an intraocular lens having a substantially cylindrical intraocular lens introducing tube for introducing the intraocular lens, wherein the intraocular lens introducing tube comprises: An insertion port for installing an intraocular lens having a shape elongated in the horizontal axis direction perpendicular to the longitudinal direction of the intraocular lens introduction tube, a discharge port for discharging the intraocular lens, and the insertion port; An intermediate portion provided between the outlet portion and the insertion portion between the insertion portion and the intermediate portion, the intraocular lens moving from the insertion portion to the intermediate portion in the horizontal axis direction. A first-stage deformation is performed from a long shape to a shape that is long in the vertical axis direction perpendicular to the horizontal axis direction, and moves from the intermediate portion to the discharge port portion between the intermediate portion and the discharge port portion. The intraocular lens is changed from a shape that is long in the longitudinal axis direction to a circular shape. It is characterized in carrying out the second stage of deformation that.

  According to the invention of claim 2, the intraocular lens having a horizontally long shape is deformed into a vertically long shape between the insertion port portion and the intermediate portion, and between the intermediate portion and the discharge port portion, By deforming the intraocular lens having a vertically long shape into a circular shape, stress can be prevented from concentrating on the root portion of the loop of the intraocular lens, and the intraocular lens can be easily moved while being rounded.

  The cartridge for inserting an intraocular lens according to a third aspect is the cartridge according to the first or second aspect, wherein the cross-sectional shape of the insertion opening has an upper straight portion and a lower straight portion that are substantially parallel to the horizontal axis. And the right end of the lower straight portion and the left end of the upper straight portion and the left end of the lower straight portion are formed in an outer arc shape, and the cross-sectional shape of the intermediate portion of the introduction pipe is the vertical It has a right straight portion and a left straight portion that are substantially parallel to the axis, and has an upper end of the right straight portion, an upper end of the left straight portion, a lower end of the right straight portion, and a lower end of the left straight portion. A shape formed by linking in an outer arc shape, a cross-sectional shape of the discharge port portion of the introduction pipe is substantially circular, and both ends of the upper straight portion of the insertion port portion are arc-shaped on the upper side of the intermediate portion Converge to the apex, and both ends of the lower straight part of the insertion part are arcuate apexes on the lower side of the intermediate part. And both ends of the right straight portion of the intermediate portion converge to the arcuate apex on the right side of the insertion port, and both ends of the left straight portion of the intermediate portion are arcuate on the left side of the insertion port. And both ends of the right straight portion of the intermediate portion converge to the vertex of the right semicircle of the discharge port portion, and both ends of the left straight portion of the intermediate portion are left semicircle of the discharge port portion It is characterized in that it converges to the vertex of.

  According to the invention of claim 3, the intraocular lens can be easily rounded without increasing the vertical force applied to the intraocular lens folded from the insertion opening to the intermediate part, and thereafter A vertical force is applied from the portion to the discharge port portion to further round it, and the intraocular lens can be easily pushed out from the discharge port portion. In addition, since a straight part is included in a part of the cross-sectional shape, it is easy to create a shape that converges this at each vertex.

  The cartridge for inserting an intraocular lens according to a fourth aspect is the cartridge according to the first or second aspect, wherein a cross-sectional shape of the insertion port portion is a substantially elliptical shape in which the horizontal axis is longer than the vertical axis, The cross-sectional shape is a substantially elliptical shape in which the vertical axis is longer than the horizontal axis, and the cross-sectional shape of the discharge port portion of the introduction pipe is a substantially circular shape.

  According to the invention of claim 4, the intraocular lens can be easily rounded without increasing the vertical force applied to the intraocular lens folded from the insertion opening to the intermediate part, and thereafter A vertical force is applied from the portion to the discharge port portion to further round it, and the intraocular lens can be easily pushed out from the discharge port portion. Further, since no corner is formed inside the introduction tube, the intraocular lens can be easily rounded.

  The cartridge for inserting an intraocular lens according to a fifth aspect is the cartridge according to any one of the first to fourth aspects, wherein the longitudinal direction of the intraocular lens introduction tube has an angle with respect to the longitudinal axis and the longitudinal axis. The tip of the intraocular lens introduction tube is formed with an angle.

  According to the invention of claim 5, even when the injector tip is formed with an angle with respect to the longitudinal axis, the angle of the tip of the introduction tube can be offset, and the discharge port portion can be easily added to the incision of the eyeball. Can be inserted.

  The invention of the cartridge for inserting an intraocular lens according to claim 1 is the cartridge for inserting an intraocular lens having a substantially cylindrical intraocular lens introducing tube for introducing the intraocular lens, wherein the intraocular lens introducing tube is An insertion port portion for inserting an intraocular lens and a discharge port portion for discharging the intraocular lens, and a cross section of the insertion port portion in a direction perpendicular to the longitudinal direction of the intraocular lens introduction tube is A flat shape having a major axis and a minor axis that are substantially orthogonal to each other at the center thereof, and when the major axis and the minor axis are a horizontal axis and a vertical axis, respectively, The horizontal axis is longer than the vertical axis, the vertical axis is longer than the horizontal axis in the cross section of the intermediate portion of the introduction pipe, and the vertical axis and the horizontal axis are substantially equal in the cross section of the discharge port portion of the introduction pipe, The horizontal axis is short from the insertion port to the intermediate part. Since it changes continuously so that the said vertical axis becomes short from the said intermediate part to the said discharge port part, it applies to the intraocular lens folded from the insertion port part to the intermediate part Without increasing the vertical force, the intraocular lens can be easily rounded, and then the vertical force can be applied from the middle part to the discharge port to further round it. The intraocular lens can be pushed out from.

  The invention of the cartridge for inserting an intraocular lens according to claim 2 is the cartridge for inserting an intraocular lens having a substantially cylindrical intraocular lens introducing tube for introducing the intraocular lens, wherein the intraocular lens introducing tube comprises: An insertion port for installing an intraocular lens having a shape elongated in the horizontal axis direction perpendicular to the longitudinal direction of the intraocular lens introduction tube, a discharge port for discharging the intraocular lens, and the insertion port; An intermediate portion provided between the outlet portion and the insertion portion between the insertion portion and the intermediate portion, the intraocular lens moving from the insertion portion to the intermediate portion in the horizontal axis direction. A first-stage deformation is performed from a long shape to a shape that is long in the vertical axis direction perpendicular to the horizontal axis direction, and moves from the intermediate portion to the discharge port portion between the intermediate portion and the discharge port portion. The intraocular lens is changed from a shape that is long in the longitudinal axis direction to a circular shape. Because 2 is set to be performed stage of deformation that, prevents the stress concentration at the base portion of the loop of the intraocular lens can intraocular lens moved easily while rounding.

  The cartridge for inserting an intraocular lens according to a third aspect of the present invention is the cartridge according to the first or second aspect, wherein the cross-sectional shape of the insertion port portion includes an upper straight portion and a lower straight portion that are substantially parallel to the horizontal axis. The right end of the straight portion and the right end of the lower straight portion and the left end of the upper straight portion and the left end of the lower straight portion are formed in an outer arc shape, and the cross-sectional shape of the intermediate portion of the introduction pipe is A right straight portion and a left straight portion that are substantially parallel to the vertical axis, the upper end of the right straight portion, the upper end of the left straight portion, the lower end of the right straight portion, and the left straight portion; The lower end is formed in an outer arc shape, the cross-sectional shape of the discharge port portion of the introduction pipe is substantially circular, and both ends of the upper straight portion of the insertion port portion are circles on the upper side of the intermediate portion. Converging to the arcuate apex, both ends of the lower straight portion of the insertion port are circles on the lower side of the intermediate portion Converge to the apex of the shape, both ends of the right straight portion of the intermediate portion converge to the arcuate apex on the right side of the insertion port, and both ends of the left straight portion of the intermediate portion to the left of the insertion port The both ends of the right straight portion of the middle portion converge to the top of the right semicircle of the discharge port portion, and both ends of the left straight portion of the middle portion of the discharge port portion. Since it converges at the top of the left semicircle, the intraocular lens can be easily rounded without increasing the vertical force applied to the intraocular lens folded from the insertion port to the middle part, Thereafter, a force in the vertical direction is applied from the intermediate portion to the discharge port portion to further round, and the intraocular lens can be easily pushed out from the discharge port portion. In addition, since a straight part is included in a part of the cross-sectional shape, it is easy to create a shape that converges this at each vertex.

  The cartridge for inserting an intraocular lens according to a fourth aspect of the present invention is the cartridge according to the first or second aspect, wherein the insertion port has a substantially elliptical cross-section in which the horizontal axis is longer than the vertical axis. Since the cross-sectional shape of the part is a substantially elliptical shape in which the vertical axis is longer than the horizontal axis, and the cross-sectional shape of the discharge port part of the introduction tube is a substantially circular shape, the intraocular folded from the insertion port part to the intermediate part The intraocular lens can be easily rounded without increasing the vertical force applied to the lens, and then it can be further rounded by the vertical force applied from the middle to the outlet. The intraocular lens can be pushed out from the discharge port. Further, since no corner is formed inside the introduction tube, the intraocular lens can be easily rounded.

  The cartridge for inserting an intraocular lens according to a fifth aspect of the present invention is the cartridge according to any one of the first to fourth aspects, wherein the longitudinal axis of the intraocular lens introduction tube has an angle with respect to the longitudinal axis and the longitudinal axis. Since the tip of the intraocular lens introduction tube is formed at an angle with respect to the angle, even if the injector tip is formed at an angle with respect to the vertical axis, the angle of the tip of the introduction tube can be offset The discharge port can be easily inserted into the incision of the eyeball.

  Embodiments of the present invention will be described below.

  First, a first embodiment of the present invention will be described.

  FIG. 1 is a perspective view showing an intraocular lens insertion cartridge according to a first embodiment of the present invention. Reference numeral 1 denotes a cartridge. The cartridge 1 includes an introduction tube 2, an insertion port portion 3, a discharge port portion 4, an insertion groove 5, and blades 6 and 7.

  The insertion port 3 is for loading a folded intraocular lens, and an insertion groove 5 is provided there. The insertion groove 5 is a groove for holding and loading an intraocular lens with a lever. By inserting the lever into the insertion groove 5, the folded intraocular lens can be loaded into the insertion port 3. Further, the inside of the introduction tube 2 has a tubular shape because an intraocular lens that is folded and set in the insertion port 3 passes therethrough. Reference numeral 8 denotes a cross-sectional shape of the insertion port portion 3, 9 denotes a cross-sectional shape of the intermediate portion of the introduction pipe 2, and 10 denotes a cross-sectional shape of the discharge port portion 4.

  The soft intraocular lens that can use the cartridge 1 is not particularly limited as long as it is a soft material, and for example, a silicone resin, an acrylic resin, a hydrogel, or the like can be used.

  As a method of folding the intraocular lens, a method of folding with an insulator may be used, but a method using a storage container having a mechanism for folding a soft intraocular lens is convenient. An example of the storage container is shown in FIG. And an intraocular lens can be easily folded using this storage container. Since the storage container shown in FIG. 6 has been described above, the description thereof is omitted here.

  Further, a discharge port portion 4 is formed at the distal end of the introduction tube 2, and this discharge port portion 4 is inserted into an incision in the eyeball. Therefore, the cartridge 1 needs to be made of a material that does not adversely affect the human body, and is made of, for example, a polyalkene such as polypropylene. The polypropylene contains a lubricant such as glycerol monostearate, and this lubricant is exposed to the surface of the cartridge 1 by plasma exposure treatment, blooming treatment, high temperature treatment, humidity treatment, and the like. In many cases, the intraocular lens moves smoothly.

  The wings 6 and 7 are for mounting the cartridge 1 on a cartridge mounting portion 28 provided at the tip of an injector 27 as shown in FIG. 3, and the wings 6 and 7 are held by the mounting portion 28. The cartridge 1 and the injector 27 are integrated.

  Further, the injector 27 is provided with an extrusion rod 29. The tip of the push rod 29 is thin (not shown), and this tip can be inserted into the introduction tube 2 of the cartridge 1. The push rod 29 is used to insert an intraocular lens into the eyeball through the discharge port 4.

  Next, the internal shape of the introduction pipe 2 will be described with reference to FIG.

  In FIG. 4, 8a shows the cross-sectional shape in the insertion port 3 of the introduction tube, and the cross section in the direction perpendicular to the longitudinal direction of the introduction tube 2 has a major axis and a minor axis that are substantially orthogonal to each other at the center. When the long axis and the short axis are the horizontal axis and the vertical axis, respectively, the upper straight part and the lower straight part are substantially parallel to the horizontal axis, the right end and the lower part of the upper straight part. The shape is formed by connecting the right end of the straight portion and the left end of the upper straight portion and the left end of the lower straight portion in an outer arc shape.

  Reference numeral 9a denotes a cross-sectional shape in the intermediate portion of the introduction pipe 2, which has a right straight portion and a left straight portion substantially parallel to the vertical axis, and has an upper end of the right straight portion and an upper end of the left straight portion. And the lower end of the right straight part and the lower end of the left straight part are formed in an outer arc shape.

  Furthermore, 10a has shown the cross-sectional shape in the discharge port part 4 of an inlet tube, and is substantially circular shape.

  Further, both ends of the upper straight portion of the insertion port 3 converge to the arcuate apex on the upper side of the intermediate portion, and both ends of the lower straight portion of the insertion port 3 converge to the arcuate apex of the lower side of the intermediate portion. ing. Then, both ends of the right straight portion of the middle portion converge to the arcuate vertex on the right side of the insertion port portion 3, and both ends of the left straight portion of the middle portion converge to the arcuate vertex on the left side of the insertion port portion 3. is doing.

  In the insertion port 3, the horizontal axis is longer than the vertical axis as in 8a, but continuously changes so that the horizontal axis becomes shorter from the insertion port 3 to the intermediate part, and in the intermediate part 9a Thus, the horizontal axis is shorter than the vertical axis, that is, the vertical axis is longer than the horizontal axis.

  Further, both ends of the right straight portion of the middle portion converge at the apex of the right arc of the discharge port portion 4, and both ends of the left straight portion of the intermediate portion converge at the apex of the left arc of the discharge port portion 4.

  And in the middle part, the vertical axis is longer than the horizontal axis as 9a, but continuously changes so that the vertical axis becomes shorter from the intermediate part to the discharge port part 4, so that the discharge port part 4 has 10a. The vertical and horizontal axes are substantially equal.

  That is, the cross-sectional shape of the inside of the introduction pipe 2 does not change the length of the vertical axis from the insertion port portion 3 to the intermediate portion, the horizontal axis is shortened, and the length of the horizontal axis from the intermediate portion to the discharge port portion 4 is There is no change and the vertical axis is shortened.

  The reason for reversing the ratio of the lengths of the vertical axis and the horizontal axis in the cross section of the insertion port portion 3 and the intermediate portion in this way is as follows.

  FIG. 2 is a plan view showing a state in which the folded intraocular lens L is inserted into the introduction tube 2. As can be seen from FIG. 2, the folded intraocular lens L tries to open in the introduction tube 3, and a force acts in the vertical direction of the introduction tube 2.

  If the length of the horizontal axis is shortened without changing the length of the vertical axis from the insertion port 3 to the intermediate part of the introduction tube 2, a lateral force is applied to the intraocular lens. Since the height does not change, the inside of the introduction tube 2 can be moved without increasing the applied force in the vertical direction, whereby the intraocular lens L can be easily rounded. Then, when the intraocular lens L is rounded to some extent, the intraocular lens L can be further rounded and smoothly moved through the introduction tube 2 even if a vertical force is applied. By shortening the vertical axis without changing the length of the horizontal axis from the intermediate portion to the discharge port portion 4, the intraocular lens can be pushed out from the discharge port portion 4 in a state of being rounded down.

  Moreover, since a part of the cross-sectional shape of the introduction pipe 2 has a straight line portion, it becomes easy to create a shape that converges this at each vertex.

  Further, the discharge port portion 4 is formed with an angle with respect to the longitudinal axis when the longitudinal direction of the introduction tube 2 is taken as the longitudinal axis, that is, the cut surface is formed obliquely. Thereby, the discharge port part 4 can be easily inserted in the incisional wound of the eyeball.

  Further, the discharge port portion 4 is formed with an angle of, for example, 45 ° with respect to the vertical axis of the discharge port portion 4. As a result, the cartridge mounting portion 28 of the injector 27 to which the cartridge 1 is mounted can be discharged even if the cartridge 1 is mounted at an angle of 45 °, for example, with respect to the injector 27 because of the ease of intraocular lens insertion operation. Since the angle between the outlet portion 4 and the cartridge 1 is canceled out, the outlet portion 4 can be easily inserted into the incision of the eyeball.

  As described above, the intraocular lens insertion cartridge of the present embodiment is the intraocular lens insertion cartridge provided with the substantially cylindrical intraocular lens introduction tube 2 for introducing the intraocular lens. The introduction tube 2 includes an insertion port portion 3 for inserting the intraocular lens and a discharge port portion 4 for discharging the intraocular lens, and the introduction tube 2 of the intraocular lens introduction tube 2 of the insertion port portion 3 is provided. The cross section 8a in the direction orthogonal to the longitudinal direction has a flat shape having a major axis and a minor axis that are substantially orthogonal to each other at the center, and the major axis and the minor axis are taken as a horizontal axis and a vertical axis, respectively. In this case, the horizontal axis is longer than the vertical axis in the cross section 8a of the insertion port portion 3, and the vertical axis is longer than the horizontal axis in the cross section 9a of the intermediate portion of the introduction pipe 2. In the cross section 10a of the portion 4, the vertical axis and the horizontal axis are substantially equal, and the front The horizontal axis changes continuously so as to be shorter from the insertion opening portion 3 toward the intermediate portion, said longitudinal axis from said intermediate portion to the outlet portion 4 is continuously changed to be shorter.

  With this configuration, the intraocular lens can be easily rounded without increasing the vertical force applied to the intraocular lens folded from the insertion port 3 to the intermediate part. A force in the vertical direction is applied to the discharge port portion 4 to further round it, and the intraocular lens can be easily pushed out from the discharge port portion 4.

  The cross-sectional shape 8a of the insertion opening 3 has an upper straight portion and a lower straight portion that are substantially parallel to the horizontal axis, and a right end of the upper straight portion, a right end of the lower straight portion, and a left end of the upper straight portion. And the left end of the lower straight portion is formed in an outer arc shape, and the cross-sectional shape 9a of the intermediate portion of the introduction pipe 2 is a right straight portion and a left straight portion that are substantially parallel to the vertical axis. The upper end of the right straight portion, the upper end of the left straight portion, and the lower end of the right straight portion and the lower end of the left straight portion are formed in an outer arc shape, A cross-sectional shape 10a of the discharge port portion 4 of the introduction pipe 2 is substantially circular, and both ends of the upper straight portion of the insertion port portion 3 converge to an arcuate apex on the upper side of the intermediate portion. The both ends of the lower straight part of the lower part converge to the arcuate apex on the lower side of the intermediate part, the right straight part of the intermediate part Both ends converge to the arcuate apex on the right side of the insertion port 3, both ends of the left straight portion of the intermediate unit converge to the arcuate apex on the left side of the insertion port 3, and the right side of the intermediate unit Both ends of the straight portion converge at the apex of the right semicircle of the discharge port 4, and both ends of the left straight portion of the intermediate portion converge at the apex of the left semicircle of the discharge port 4.

  With this configuration, the intraocular lens can be easily rounded without increasing the vertical force applied to the intraocular lens folded from the insertion port 3 to the intermediate part. A force in the vertical direction is applied to the discharge port portion 4 to further round it, and the intraocular lens can be easily pushed out from the discharge port portion 4. In addition, since a straight part is included in a part of the cross-sectional shape, it is easy to create a shape that converges this at each vertex.

  Furthermore, when the longitudinal direction of the intraocular lens introduction tube 2 is the longitudinal axis, the distal end of the intraocular lens introduction tube 2 is formed with an angle with respect to the longitudinal axis and with an angle with respect to the longitudinal axis. .

  With this configuration, even when the tip of the injector is formed with an angle with respect to the vertical axis, the angle of the tip of the introduction tube 2 can be offset, and the discharge port 4 can be easily applied to the incision of the eyeball. Can be inserted.

  Next, a second embodiment of the present invention will be described.

  Since the cartridge in the second embodiment of the present invention is basically the same as the cartridge in the first embodiment, the description of the same parts is omitted.

  The difference between the second embodiment and the first embodiment is that, as shown in FIG. 5, the shape of the inside of the introduction tube 2 is substantially elliptical.

  In FIG. 5, 8b shows the cross-sectional shape of the insertion port portion 3 which is the insertion port portion of the introduction tube, and the cross section in the direction perpendicular to the longitudinal direction of the introduction tube 2 is a length substantially perpendicular to each other at the central portion. When the major axis and the minor axis are the horizontal axis and the vertical axis, respectively, the horizontal axis is a substantially elliptical shape longer than the vertical axis.

  Moreover, 9b has shown the cross-sectional shape in the intermediate part of the introductory tube 2, and the vertical axis | shaft is substantially elliptical shape longer than a horizontal axis.

  Furthermore, 10b has shown the cross-sectional shape in the discharge port part 4 of an inlet tube, and is substantially circular shape.

  In the insertion port 3, the horizontal axis is longer than the vertical axis as in 8b, but continuously changes so that the horizontal axis becomes shorter from the insertion port 3 to the intermediate portion, and in the intermediate portion 9b Thus, the horizontal axis is shorter than the vertical axis, that is, the vertical axis is longer than the horizontal axis.

  Furthermore, although the vertical axis is longer than the horizontal axis as 9b in the intermediate portion, it continuously changes so that the vertical axis becomes shorter from the intermediate portion to the discharge port portion 4, and 10b in the discharge port portion 4 Thus, the vertical axis and the horizontal axis are substantially equal.

  That is, in the cross-sectional shape inside the introduction pipe 2, the length of the vertical axis does not change from the insertion port portion 3 to the intermediate portion, the horizontal axis becomes shorter, and the length of the horizontal axis changes from the intermediate portion to the discharge port portion 4. Without the vertical axis, the vertical axis is shortened.

  If the length of the horizontal axis is shortened without changing the length of the vertical axis from the insertion port 3 to the intermediate portion of the introduction tube 2, a lateral force is applied to the intraocular lens, but the length of the vertical axis changes. Therefore, the movement in the introduction tube 2 can be performed without increasing the applied force in the vertical direction, whereby the intraocular lens L can be easily rounded. Then, when the intraocular lens L is rounded to some extent, the intraocular lens L can be further rounded and smoothly moved through the introduction tube 2 even if a vertical force is applied. By shortening the vertical axis without changing the length of the horizontal axis from the intermediate portion to the discharge port portion 4, the intraocular lens can be pushed out from the discharge port portion 4 in a state of being rounded down. Further, since no corner is formed inside the introduction tube 2, the intraocular lens can be easily rounded.

  As described above, the intraocular lens insertion cartridge of the present embodiment is the intraocular lens insertion cartridge provided with the substantially cylindrical intraocular lens introduction tube 2 for introducing the intraocular lens. The introduction tube 2 includes an insertion port portion 3 for inserting the intraocular lens and a discharge port portion 4 for discharging the intraocular lens, and the introduction tube 2 of the intraocular lens introduction tube 2 of the insertion port portion 3 is provided. The cross section 8b in the direction orthogonal to the longitudinal direction has a flat shape having a major axis and a minor axis that are substantially orthogonal to each other at the center, and the major axis and the minor axis are taken as a horizontal axis and a vertical axis, respectively. In this case, the horizontal axis is longer than the vertical axis in the cross section 8b of the insertion port 3, and the vertical axis is longer than the horizontal axis in the cross section 9b of the intermediate portion of the introduction pipe 2. In the cross section 10b of the part 4, the vertical axis and the horizontal axis are substantially equal, and the front The horizontal axis changes continuously so as to be shorter from the insertion opening portion 3 toward the intermediate portion, said longitudinal axis from said intermediate portion to the outlet portion 4 is continuously changed to be shorter.

  With this configuration, the intraocular lens can be easily rounded without increasing the vertical force applied to the intraocular lens folded from the insertion port 3 to the intermediate part. A force in the vertical direction is applied to the discharge port portion 4 to further round it, and the intraocular lens can be easily pushed out from the discharge port portion 4.

  Moreover, the cross-sectional shape 8b of the insertion port 3 is a substantially elliptical shape whose horizontal axis is longer than the vertical axis, and the cross-sectional shape 9b of the intermediate portion of the introduction tube 2 is a substantially elliptical shape whose vertical axis is longer than the horizontal axis. The cross-sectional shape 10b of the discharge port portion 4 of the tube 2 is substantially circular.

  With this configuration, the intraocular lens can be easily rounded without increasing the vertical force applied to the intraocular lens folded from the insertion port 3 to the intermediate part. A force in the vertical direction is applied to the discharge port portion 4 to further round it, and the intraocular lens can be easily pushed out from the discharge port portion 4. Further, since no corner is formed inside the introduction tube 2, the intraocular lens can be easily rounded.

  In each of the above embodiments, the horizontal axis is longer than the vertical axis in the cross section 8 of the insertion port portion 3, and the vertical axis is longer than the horizontal axis in the cross section 9 of the intermediate portion of the introduction pipe 2. In the cross section 10, the vertical axis and the horizontal axis are substantially equal, the first stage continuously changing so that the horizontal axis is shortened from the insertion port 3 to the intermediate portion, and the vertical axis is short from the intermediate portion to the discharge port 4. In the second stage that changes so as to be, it changes continuously in two stages. With this configuration, from the insertion port portion 3 to the intermediate portion, it is possible to easily apply intraocular force by applying force only from the left-right direction without increasing the vertical force applied to the folded intraocular lens. The lens can be rounded, and then the intraocular lens can be further easily rounded by applying force only from the vertical direction from the middle part to the discharge port part 4 without increasing the force applied from the left and right direction. It can be done.

  In other words, by constructing to increase the force applied from only one direction in the left-right direction and the up-down direction, the roundness of the intraocular lens is drastically compared to the case where force is applied from all directions as in the past. It can improve ease of use.

  Therefore, for example, the length of the vertical axis that is the short axis of the insertion port and the length of the vertical axis of the discharge port are equal, and the horizontal axis of the cross section of the insertion port is longer than the vertical axis, and the cross section of the discharge port of the introduction pipe Even if the vertical axis and the horizontal axis are substantially equal to each other and the length of the vertical axis is constant from the insertion port portion to the discharge port portion and the horizontal axis is shortened, it is folded in one step. Without increasing the vertical force applied to the intraocular lens, the force is applied only from the left-right direction, and the ease of rounding of the intraocular lens is dramatically improved when compared to the conventional example. Can do.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made.

It is a perspective view which shows the cartridge in one embodiment of this invention. In the said embodiment, it is a top view which shows the state by which the intraocular lens was inserted in the insertion port part of a cartridge. It is a figure which shows the mode in the case of mounting | wearing the injector with the cartridge in the said embodiment. It is a perspective view which shows the shape of the inlet tube of the cartridge of the 1st Embodiment of this invention. It is a perspective view which shows the shape of the inlet tube of the cartridge of the 2nd Embodiment of this invention. It is a perspective view which shows the storage container which has a soft intraocular lens folding mechanism. It is a perspective view which shows the conventional cartridge.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cartridge 2 Introducing pipe 3 Insertion port part 4 Outlet part 8,8a, 8b Section 9, 9a, 9b Section 10, 10a, 10b Section

Claims (5)

In the intraocular lens insertion cartridge provided with a substantially cylindrical intraocular lens introduction tube for introducing the intraocular lens,
The intraocular lens introduction tube includes an insertion port for inserting the intraocular lens;
A discharge port for discharging the intraocular lens;
The cross section of the insertion port portion in the direction orthogonal to the longitudinal direction of the intraocular lens introduction tube is a flat shape having a major axis and a minor axis that are substantially perpendicular to each other at the center, and the major axis and When the short axis is the horizontal axis and the vertical axis, respectively, the horizontal axis is longer than the vertical axis in the cross section of the insertion port, the vertical axis is longer than the horizontal axis in the cross section of the intermediate portion of the introduction pipe, In the cross-section of the discharge port portion of the introduction pipe, the vertical axis and the horizontal axis are substantially equal, and the horizontal axis is continuously changed from the insertion port portion to the intermediate portion so that the horizontal axis is shortened, and the discharge from the intermediate portion is performed. A cartridge for inserting an intraocular lens, wherein the cartridge continuously changes so as to shorten the vertical axis toward the outlet.   In the intraocular lens insertion cartridge provided with a substantially cylindrical intraocular lens introduction tube for introducing the intraocular lens,
  The intraocular lens introduction tube is
  An insertion port for installing an intraocular lens having a long shape in the horizontal axis direction perpendicular to the longitudinal direction of the intraocular lens introduction tube;
  A discharge port for discharging the intraocular lens;
  An intermediate portion provided between the insertion port and the discharge port,
  Between the insertion port portion and the intermediate portion, the intraocular lens moving from the insertion port portion to the intermediate portion has a shape that is long in the vertical axis direction that is perpendicular to the horizontal axis direction from a shape that is long in the horizontal axis direction. To perform the first stage transformation
  Between the intermediate portion and the discharge port portion, a second-stage deformation is performed in which the intraocular lens moving from the intermediate portion to the discharge port portion is changed from a long shape to a circular shape in the vertical axis direction.
A cartridge for inserting an intraocular lens. The cross-sectional shape of the insertion opening has an upper straight portion and a lower straight portion that are substantially parallel to the horizontal axis, and a right end of the upper straight portion, a right end of the lower straight portion, and a left end of the upper straight portion and the lower portion. The shape is formed by connecting the left end of the straight portion to the outer arc, and the cross-sectional shape of the intermediate portion of the introduction pipe has a right straight portion and a left straight portion substantially parallel to the vertical axis, The upper end of the right straight portion, the upper end of the left straight portion, and the lower end of the right straight portion and the lower end of the left straight portion are formed in an outer arc shape, and is a discharge port of the introduction pipe The cross-sectional shape of the portion is substantially circular, and both ends of the upper straight portion of the insertion port converge to an arcuate apex on the upper side of the intermediate portion, and both ends of the lower straight portion of the insertion port are the intermediate portion Converge to the lower arcuate apex, and both ends of the right straight portion of the middle portion are circles on the right side of the insertion port. Converge to the apex of the middle, both ends of the left straight portion of the intermediate portion converge to the arcuate apex on the left side of the insertion port, and both ends of the right straight portion of the middle portion to the right of the discharge port The intraocular lens insertion according to claim 1 or 2 , characterized in that it converges to a vertex of a semicircle, and both ends of the left straight portion of the intermediate portion converge to a vertex of a left semicircle of the discharge port portion. Cartridge. The cross-sectional shape of the insertion port is a substantially elliptical shape in which the horizontal axis is longer than the vertical axis, and the cross-sectional shape of the intermediate portion of the introduction tube is a substantially elliptical shape in which the vertical axis is longer than the horizontal axis, The cartridge for inserting an intraocular lens according to claim 1 or 2 , wherein the discharge port portion of the introduction tube has a substantially circular cross-sectional shape. When the longitudinal direction of the intraocular lens introduction tube is a longitudinal axis, the distal end of the intraocular lens introduction tube is formed with an angle with respect to the longitudinal axis and with an angle with respect to the longitudinal axis. The cartridge for inserting an intraocular lens according to any one of claims 1 to 4 .

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