Trocar for ophthalmic operation and trocar system provided with trocar for ophthalmic operation

Abstract

To provide a trocar for ophthalmic operation capable of reliably inserting a surgical instrument with an outer shape larger than forceps into the eyeball, and a trocar system.SOLUTION: In a trocar 2, a hollow insertion part 4 on an end side and a hollow body part 6 on a rear end side are connected, an internal space is formed from the end opening of the insertion part to the rear end opening 6A of the body part is formed, and at least the insertion part has elasticity. When an edge part of a knife 20 is inserted inside the eyeball so that the edge part 22 protrudes from the end opening, the insertion part is also inserted inside the eyeball as the edge part is, and by removing the knife only from the rear end opening, the insertion part is located inside the eyeball, an installation state that the body part is located outside the eyeball is formed. The edge part can pass inside the insertion part and, when the surgical instrument is inserted in the insertion part in the installation state, the insertion part expands; when the surgical instrument is removed from the rear end opening, the expanded insertion part returns to its original shape.SELECTED DRAWING: Figure 5A

Description

[Technical field]

[0001] The present invention relates to a trocar for ophthalmic surgery, which is used to insert a surgical instrument into the eyeball during ophthalmic surgery. [Background technology]

[0002] In ophthalmic surgery, in vitreoretinal surgery, as shown in Patent Document 1, for example, a trocar having a thin metal tube is inserted into the surface of the eyeball. Forceps can be passed through this trocar, and the tip of the forceps can be inserted into the eyeball. Furthermore, the tip of the forceps can be brought to the fundus to perform retinal surgery. In the surgery described in Patent Document 1, the diameter of the forceps is about 0.5 mm, and the forceps are pivoted around the insertion point of the trocar as a fulcrum, so the outer diameter of the trocar is also very small. Therefore, it is possible to push the metal trocar into the eyeball. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-142902 Summary of the Invention [Problem to be solved by the invention]

[0004] However, such trocars cannot be used with larger surgical instruments, such as ultrasonic handpieces used in phacoemulsification of cataracts. If the outer diameter of a metal trocar were to be expanded to a size that would allow the insertion of an ultrasonic handpiece, it would be difficult to insert the trocar into the eyeball without damaging it, and the wound would be deformed and difficult to close.

[0005] Therefore, currently, the surgeon uses a knife to cut the tissue to form a wound and insert the ultrasonic handpiece into the eye. In this case, the ultrasonic handpiece has a large external shape, so the wound is large. In addition, depending on the surgeon's skill, there is a risk that the surgical operation will become unstable due to irregularities in the wound or inconsistencies in size, which may lead to various complications. In addition, every time the handpiece is inserted or removed, aqueous humor flows out of the eyeball, causing fluctuations in intraocular pressure and causing the eyeball to temporarily collapse or expand, which may apply excessive force to parts inside the eyeball and cause complications.

[0006] Therefore, an object of the present invention is to provide an ophthalmic surgical trocar that enables a surgical instrument having an outer shape larger than forceps to be reliably inserted into an eyeball regardless of the skill of the surgeon, and a trocar system equipped with this ophthalmic surgical trocar. [Means for solving the problem]

[0007] One aspect of the present invention is a method for producing a composition comprising the steps of: A trocar having a hollow insertion portion at a tip end side and a hollow main body portion at a rear end side connected to each other, an internal space being formed from a tip opening of the insertion portion to a rear opening of the main body portion, and at least the insertion portion having elasticity, When the knife is placed in the internal space so that the cutting edge protrudes from the tip opening, the outer shape of the insertion part is mostly hidden by the outer shape of the cutting edge when viewed from the tip side of the cutting edge, and when the cutting edge is inserted into the inside of the eyeball, the insertion part is also inserted into the inside of the eyeball along with the cutting edge, and when only the knife is removed from the rear end opening, an installation state is formed in which the insertion part is located inside the eyeball and the main body part is located outside the eyeball, The insertion portion is expanded so that the cutting edge portion can pass through the insertion portion, In the installed state, when a surgical instrument is inserted into the insertion portion from the rear end opening, the insertion portion expands and the tip of the surgical instrument is inserted into the eyeball, and when the surgical instrument is removed from the rear end opening, the expanded insertion portion returns to its original shape.This is a trocar for ophthalmic surgery.

[0008] Another aspect of the present invention is The above-mentioned trocar for ophthalmic surgery, The surgical instrument is an ultrasonic handpiece including an ultrasonic transducer having a suction port for sucking in an irrigation fluid and a crushing portion, and a sleeve for supplying an irrigation fluid, the sleeve being arranged so as to cover the outer surface of the ultrasonic transducer; This is a trocar system for ophthalmic surgery equipped with

[0009] Yet another aspect of the present invention is The above-mentioned trocar for ophthalmic surgery, The surgical instrument is an ultrasonic handpiece having an ultrasonic transducer with a suction port for sucking the irrigation fluid and the crushed portion; an infusion trocar for providing perfusion fluid; Equipped with The trocar system for ophthalmic surgery is a trocar system for ophthalmic surgery, the trocar being heat resistant. Effect of the Invention

[0010] As described above, the present invention provides an ophthalmic surgical trocar that enables a surgical instrument having an outer shape larger than forceps to be reliably inserted into an eyeball regardless of the skill of the surgeon, and a trocar system equipped with this ophthalmic surgical trocar. [Brief description of the drawings]

[0011] [Figure 1] 1A and 1B are perspective views showing the outer shape of a trocar for ophthalmic surgery according to a first embodiment of the present invention, in which (a) is a view from the tip end side, and (b) is a view from the rear end side. [Figure 2A] FIG. 2 is a view taken along the line AA in FIG. 1(a), showing a side view of the trocar for ophthalmic surgery as seen from the rear end side. [Figure 2B] 2B is a diagram showing a state in which a knife or a surgical instrument has been inserted into the ophthalmic surgical trocar from the state shown in FIG. 2A. [Diagram 3]2B is a cross-sectional view taken along line BB of FIG. 2A, showing a side cross-section of the trocar for ophthalmic surgery, and further showing a state in which a knife is attached to the trocar for ophthalmic surgery. [Figure 4A] FIG. 2 is a diagram showing the maximum longitudinal dimension Lt1 of an ophthalmic surgical trocar and the maximum width dimension Ln1 of an attached knife. [Figure 4B] FIG. 2 is a diagram showing the maximum short dimension Lt2 of an ophthalmic surgical trocar and the maximum thickness dimension Ln2 of an attached knife. [Figure 5A] FIG. 2 is a schematic diagram showing a state in which the insertion portion of the ophthalmic surgical trocar is inserted into the inside of the eyeball by inserting the cutting edge of the attached knife into the inside of the eyeball. [Figure 5B] 5B is a diagram showing a schematic view of the state in which only the knife is extracted from the state shown in FIG. 5A. FIG. [Figure 5C] FIG. 1 is a schematic diagram showing a surgical procedure in which a surgical instrument is inserted into an ophthalmic surgical trocar whose insertion portion is inserted inside an eyeball to perform surgery. [Figure 6] FIG. 1 is a schematic diagram showing an operation of an eyeball using a trocar system for ophthalmic surgery including a trocar for ophthalmic surgery according to a first embodiment of the present invention. [Figure 7] FIG. 11 is a side cross-sectional view showing an ophthalmic surgical trocar according to a second embodiment of the present invention, and in particular is a schematic diagram showing an insertion portion being inserted into the inside of an eyeball and a surgical instrument being inserted to perform surgery. [Figure 8A] FIG. 13 is a diagram showing an example of an infusion trocar for use with an ophthalmic surgical trocar according to the second embodiment of the present invention, showing the irrigation fluid tube attached to the internal region of the main body in a folded state. [Figure 8B] FIG. 13 shows an example of an infusion trocar used together with an ophthalmic surgical trocar according to the second embodiment of the present invention, illustrating the state in which irrigation fluid is supplied to a folded irrigation fluid tube to supply fluid into the eyeball. [Figure 9]FIG. 13 is a schematic diagram showing an eye surgery being performed using a trocar system for ophthalmic surgery comprising a trocar for ophthalmic surgery and an infusion trocar according to a second embodiment of the present invention. [Figure 10A] FIG. 1 is a perspective view showing a schematic example of a sealing member for a side port attached to a surgical auxiliary instrument. [Figure 10B] FIG. 13 is a perspective view showing a schematic view of another example of a side port sealing member to be attached to a surgical auxiliary instrument. [Figure 11A] FIG. 1 is a perspective view showing a schematic example of a contact lens for covering the eyeball during surgery, which is used with a trocar for ophthalmic surgery according to a first embodiment of the present invention. [Figure 11B] FIG. 11 is a perspective view showing a contact lens for covering the eyeball during surgery, which is a schematic diagram illustrating an example of a contact lens for use with a trocar for ophthalmic surgery according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment for carrying out the present invention will be described with reference to the drawings. Note that the embodiment described below is for embodying the technical idea of ​​the present invention, and the present invention is not limited to the following unless otherwise specified. In each drawing, components having the same function may be given the same symbol. In consideration of the explanation or ease of understanding of the main points, the embodiments may be shown separately for convenience, but partial replacement or combination of the configurations shown in different embodiments is possible. In the embodiments described below, the description of matters common to the above-mentioned embodiments will be omitted, and only the differences will be described. In particular, similar effects due to similar configurations will not be mentioned in each embodiment. The size and positional relationship of the components shown in each drawing may be exaggerated to clarify the explanation.

[0013] (Ophthalmic surgical trocar according to the first embodiment of the present invention) First, an ophthalmic surgical trocar according to a first embodiment of the present invention will be described with reference to Figs. 1 to 4B. Fig. 1 is a perspective view showing the outer shape of an ophthalmic surgical trocar according to a first embodiment of the present invention, where (a) is a view from the tip side and (b) is a view from the rear end side. Fig. 2A is an arrow AA view of Fig. 1(a), which is a side view of the ophthalmic surgical trocar from the rear end side. Fig. 2B is a view showing a state in which a knife and a surgical instrument are inserted into the ophthalmic surgical trocar from the state shown in Fig. 2A. Fig. 3 is a BB cross-sectional view of Fig. 2A, which shows a side cross-section of the ophthalmic surgical trocar and further shows a state in which a knife is attached to the ophthalmic surgical trocar. Fig. 4A is a view showing the maximum longitudinal dimension Lt1 of the ophthalmic surgical trocar and the maximum width dimension Ln1 of the attached knife. Fig. 4B is a view showing the maximum transverse dimension Lt2 of the ophthalmic surgical trocar and the maximum thickness dimension Ln2 of the attached knife.

[0014] The ophthalmic surgical trocar 2 according to this embodiment is configured by integrally connecting a hollow insertion section 4 at the tip side and a hollow main body section 6 at the rear end side. An internal space 8 is formed from a tip opening 4A of the insertion section 4 to a rear end opening 6A of the main body section 6 (see FIG. 3). In the ophthalmic surgical trocar 2 according to this embodiment, at least the insertion section 4 is elastic. As an elastic material for forming the insertion section 4, any elastic rubber material or resin material, including silicone, can be used.

[0015] The insertion portion 4 and the main body portion 6 may have the same elasticity, or the main body portion 6 may be made of a harder material than the insertion portion 4. The insertion portion 4 may also be formed to have different degrees of elasticity in different regions, so that it can flexibly expand and contract while also having rigidity as a structure. An ophthalmic surgical trocar 2 having different elasticity in different regions can be realized, for example, by two-color molding.

[0016] The cross-sectional shape of the insertion portion 4 and the shape of the tip opening 4A are elongated shapes corresponding to the cross-sectional shape of the cutting edge 22 of the knife 20 to be inserted. On the other hand, the main body 6 has an elliptical or circular cross-sectional shape with smaller vertical and horizontal dimensional differences than the insertion portion 4.

[0017] <Dimensions of insertion part and blade tip> In this embodiment, the knife 20 is attached to the trocar 2 for ophthalmic surgery and used as an integrated set. As shown in FIG. 4A, the maximum width dimension Ln1 of the cutting edge of the knife 20 is equal to or greater than the maximum longitudinal dimension Lt1 of the insertion portion 4 of the trocar 2 for ophthalmic surgery. In other words, there is a relationship of Ln1 ≧ Lt1. Similarly, as shown in FIG. 4B, the maximum width dimension Ln2 of the cutting edge of the knife 20 is equal to or greater than the maximum transverse dimension Lt2 of the insertion portion 4 of the trocar 2 for ophthalmic surgery. In other words, there is a relationship of Ln2 ≧ Lt2.

[0018] In this way, the maximum outer diameter of the cutting edge 22 of the knife 20 is equal to or larger than the maximum outer diameter of the insertion portion 4 of the ophthalmic surgical trocar 2 that covers the cutting edge 22, but when the cutting edge 22 is inserted into the insertion portion 4, the insertion portion 4 can expand elastically. Therefore, the cutting edge 22 of the knife 20 passes through the insertion portion 4, and the cutting edge 22 can be set to protrude from the distal end opening 4A of the insertion portion 4. The internal dimensions of the main body 6 are larger than the external dimensions of the cutting edge 22 of the knife 20, so that they do not interfere with each other. Furthermore, the internal dimensions of the main body 6 are larger than the external dimensions of the surgical instrument 30 described later, so that they do not interfere with each other.

[0019] When the knife 20 is removed from the ophthalmic surgical trocar 2, the insertion portion 4 expands elastically, just as when the knife 20 is inserted into the ophthalmic surgical trocar 2, so that the cutting edge 22 of the knife 20 moves toward the rear end within the insertion portion 4, and only the knife 20 can be removed from the rear end opening 6A of the main body 6.

[0020] In this embodiment, no edge is formed in the area (see arrows P and Q in FIG. 3) of cutting edge 22 of knife 20 that comes into contact with the inner surface of insertion portion 4 when passing through the insertion portion 4. The area shown by arrows P and Q in FIG. 3 that comes into contact with the inner surface of insertion portion 4 preferably has a smoothly curved shape.

[0021] In this embodiment, there is no edge in the area of ​​the knife 20 that contacts the inner surface of the insertion portion 4, so the knife 20 can be smoothly inserted and removed without damaging the inner surface of the insertion portion 4.

[0022] As described above, the maximum width dimension Ln1 of the cutting edge portion 22 is greater than or equal to the maximum longitudinal dimension Lt1 of the outer shape of the insertion portion 4, and the maximum thickness dimension Ln2 of the cutting edge portion 22 is greater than or equal to the maximum transverse dimension Lt2 of the outer shape of the insertion portion 4, so that the following is reliably achieved. When the knife 20 is placed in the internal space 8 so that the cutting edge 22 protrudes from the tip opening 4A, when viewed from the tip side of the cutting edge 22 (see arrow C in Figure 3), the outline of the cutting edge 22 hides the outline of the insertion portion 4.

[0023] <Valve formed from an elastic thin film> As shown in FIG. 2A and FIG. 3, a valve 12 formed by an elastic thin film 10 is provided in the vicinity of the rear end opening 6A in the main body 6. The elastic thin film 10 can be formed of any elastic rubber material or resin material, such as silicone. In the illustrated example, an opening is formed by a linear cut in the elastic thin film 10, which functions as a valve 12. However, the elastic thin film 10 is not limited to being formed in the vicinity of the rear end opening 6A of the main body 6. For example, as shown by the dotted line in FIG. 3, an elastic thin film 10' can also be formed in the boundary region between the insertion portion 4 and the main body 6. Furthermore, the elastic thin films 10, 10' can also be formed both in the vicinity of the rear end opening 6A of the main body 6 and in the boundary region between the insertion portion 4 and the main body 6.

[0024] When the knife 20 or the surgical instrument 30 is not inserted in the ophthalmic surgical trocar 2, the opening of the valve 12 is generally closed, and the outflow of aqueous humor from the inside of the eyeball can be suppressed. On the other hand, even when the knife 20 or the surgical instrument 30 is inserted in the ophthalmic surgical trocar 2, the opening of the valve 12 deforms along the outer shape of the inserted knife 20 or the surgical instrument 30 as shown in FIG. 2B, and the sealed state can be maintained as much as possible. As a result, even when the knife 20 or the surgical instrument 30 is inserted in the ophthalmic surgical trocar 2, the outflow of aqueous humor from the inside of the eyeball can be appropriately suppressed. Considering the strength when the knife 20 or the surgical instrument 30 is inserted, the thickness of the elastic thin film 10 can be, for example, about 0.3 to 1.5 mm.

[0025] As described above, in this embodiment, a valve 12 formed by an elastic thin film 10 is provided in the main body 6, and when the knife 20 or surgical instrument 30 is inserted into the main body 6 from the rear end opening 6A, the opening of the valve 12 expands in accordance with the external shape of the knife 20 or surgical instrument 30, and when the knife 20 or surgical instrument 30 is removed from the rear end opening 6A, the opening of the valve 12 closes.

[0026] In this way, the elastic thin film 10 can maintain a seal both when the knife 20 or surgical instrument 30 is inserted and after it is removed, thereby reliably preventing aqueous humor from leaking out of the eyeball.

[0027] In the illustrated example, the opening is formed by a slit extending linearly in the elastic thin film 10, but this is not limited thereto. For example, the slit may extend in a meandering or zigzag manner relative to the extension direction. Any angle may be adopted with a maximum angle perpendicular to the extension direction. The shape of the slit may be a shape of connected straight lines, a shape of connected curves, or a shape that combines straight lines and curves. In any case, it is preferable to adopt a shape that provides high sealing and followability according to the outer shape of the inserted member.

[0028] <How to use trocars for ophthalmic surgery> Next, a method of using the ophthalmic surgical trocar 2 according to this embodiment will be described with reference to Fig. 5A to Fig. 5C. Fig. 5A is a schematic diagram showing a state in which the insertion part of the ophthalmic surgical trocar is inserted into the inside of the eyeball by inserting the cutting edge of the attached knife into the inside of the eyeball. Fig. 5B is a schematic diagram showing a state in which only the knife is removed from the state shown in Fig. 5A. Fig. 5C is a schematic diagram showing a state in which a surgical instrument is inserted into the ophthalmic surgical trocar with the insertion part inserted into the inside of the eyeball to perform surgery.

[0029] As described above, when the knife 20 is placed in the internal space 8 of the ophthalmic surgical trocar 2 so that the cutting edge 22 protrudes from the distal opening 4A of the insertion portion 4, the outer shape of the insertion portion 4 is hidden by the outer shape of the cutting edge 22 when viewed from the distal end side of the cutting edge 22. Therefore, when the cutting edge 22 is inserted into the inside of an eyeball with the ophthalmic surgical trocar 2 and the knife 22 integrated, the insertion portion 4 is also inserted into the inside of the eyeball together with the cutting edge 22 (see FIG. 5A).

[0030] As described above, the inside of the main body 6 of the ophthalmic surgical trocar 2 is larger than the outer shape of the cutting edge 22 of the knife 20. At least a part of the outer shape of the main body 24 of the knife 20 is formed to be larger than the outer shape of the main body 6. As a result, an abutment surface 6B that abuts against the front surface 24A of the main body 24 of the knife 20 is formed at the rear end of the main body 6 of the ophthalmic surgical trocar 2. As a result, when the cutting edge 22 is inserted into the inside of the eyeball, the insertion portion 4 is pushed by the main body 24 of the knife 20 via the abutment surface 6B, and the insertion portion 4 is inserted into the inside of the eyeball together with the cutting edge 22.

[0031] In this way, when the cutting edge portion 22 is inserted into the inside of the eyeball, the insertion portion 4 is also pushed toward the insertion side via the abutment surface 6B, so that the insertion portion 4 is also reliably inserted into the inside of the eyeball together with the cutting edge portion 22.

[0032] As described above, when viewed from the tip side of the cutting edge 22, the outer shape of the insertion portion 4 is hidden by the outer shape of the cutting edge 22, but even if the outer shape of the insertion portion 4 protrudes slightly outward from the outer shape of the cutting edge 22, interference with the eyeball is extremely limited, and it is considered that the insertion portion 4 of the ophthalmic surgical trocar 2 is inserted relatively smoothly into the inside of the eyeball along with the cutting edge 22 of the knife 20. In particular, with regard to the short side direction of the insertion portion 4, even if the outer shape of the insertion portion 4 protrudes slightly outward from the outer shape of the cutting edge 22, the degree of contact between the cutting edge 22 and the insertion portion 4 is high, and the insertion portion 4 is inserted relatively smoothly into the inside of the eyeball.

[0033] Furthermore, the insertion portion 4 is also pushed from the rear side via the contact surface 6B, so that the insertion portion 4 is more reliably inserted into the eyeball. Taking these factors into consideration, it can be said that the insertion portion 4 is also inserted into the eyeball if the outer shape of the cutting edge 22 is mostly hidden by the outer shape of the cutting edge 22 when viewed from the tip side of the cutting edge 22.

[0034] Next, by removing only the knife 20 from the rear end opening 6A of the ophthalmic surgical trocar 2, an installation state is formed in which the insertion portion 4 is located inside the eyeball and the main body portion 6 is located outside the eyeball, as shown in Fig. 5B. At this time, the insertion portion 4 of the ophthalmic surgical trocar 2 expands elastically, and since there is no edge portion in the area of ​​the knife 20 that contacts the inner surface of the insertion portion 4, only the knife 20 can be smoothly removed. This results in an installation state in which the insertion portion 4 of the ophthalmic surgical trocar 2 is located inside the eyeball and the main body portion 6 is located outside the eyeball, as shown in Fig. 5B.

[0035] Basically, the blade tip 22 of the knife 20 integrated with the insertion part 4 is simply inserted into the eyeball, so that the insertion part 4 can be reliably inserted into the eyeball without depending on the skill of the surgeon, the time required for installation can be shortened, and work efficiency is improved. In the installed state after the knife 20 is removed, the valve 12 is in a closed state with the opening of the elastic thin film 10 located near the rear end opening 6A closed, and the outflow of aqueous humor from the inside of the eyeball can be suppressed.

[0036] In this installed state, the surgical instrument 30 is inserted from the rear end opening 6A of the ophthalmic surgical trocar 2. When the surgical instrument 30 is inserted, the opening of the elastic thin film 10 located near the rear end opening 6A deforms in accordance with the outer shape of the surgical instrument 30, allowing the surgical instrument 30 to pass through. At this time, the deformation is such that the sealing performance is maintained as much as possible, and the outflow of aqueous humor from within the eyeball can be suppressed.

[0037] In the installed state, when the surgical instrument 30 is not present, the insertion part 4 of the ophthalmic surgical trocar 2 is pushed from the outside by the pressure of the aqueous humor and the ocular tissue, and the internal space is almost collapsed. When the surgical instrument 30 is inserted into the insertion part 4, the insertion part 4 expands elastically along the outer shape of the surgical instrument 30. At this time, the part of the eyeball covering the insertion part 4 also expands according to the expansion of the insertion part 4. Since the insertion part 4 does not move in the insertion direction, the eyeball is not damaged. The eyeball can expand following the expansion of the insertion part 4, and the outflow of the aqueous humor from the inside of the eyeball can be suppressed. As a result, the tip region of the surgical instrument 30 can be placed inside the eyeball to perform surgery.

[0038] The ophthalmic surgical trocar 2 according to the first embodiment is adapted to insert a surgical instrument 30, which is an ultrasonic handpiece with an irrigation sleeve. As shown in FIG. 5C, the surgical instrument 30 is mainly composed of an ultrasonic transducer 32 and an irrigation sleeve 34 that covers the outer surface of the ultrasonic transducer 32. The ultrasonic transducer 32 generates a crushed portion by, for example, irrigating a crystalline lens with ultrasonic waves. An irrigation fluid flows between the inner surface of the irrigation sleeve 34 and the outer surface of the ultrasonic transducer 32, and flows into the eyeball from an opening 34A at the tip. The crushed portion is aspirated together with aqueous humor and irrigation fluid from an opening 32A at the tip of the ultrasonic transducer 32.

[0039] Although the ultrasonic transducer 32 becomes hot during operation, the temperature of the outer surface of the irrigation sleeve 34 that covers the outside does not become high because the irrigation fluid flows on the outside. Therefore, the ophthalmic surgical trocar 2 according to the first embodiment can be formed from a material that has or does not have heat resistance.

[0040] The outer diameter of the surgical instrument 30 passing through such an insertion portion 4 can be, for example, in the range of 1.5 mm to 4 mm. Even if a metal trocar was created to allow a surgical instrument 30 of such size to pass through, it would be impossible to insert the insertion portion into the eyeball without damaging the eyeball. As described above, by using a set of an ophthalmic surgical trocar 2 having an elastic insertion portion 4 and a knife 20 integrated therewith, it is possible for the first time to place a large insertion portion 4 inside the eyeball so that a surgical instrument 30 having an outer diameter of 1.5 mm to 4 mm can pass through.

[0041] When the surgical instrument 30 is removed after the surgery using the surgical instrument 30 is completed, the elastically deformed insertion portion 4 is pushed from the outside by the pressure of the aqueous humor and ocular tissue and returns to its original shape. Even when the surgical instrument 30 is removed, the insertion portion 4 does not move, so it is possible to avoid the problem of aqueous humor leaking out of the eye, which has been a conventional problem.

[0042] As described above, the ophthalmic surgical trocar 2 according to the first embodiment of the present invention is a trocar in which the hollow insertion portion 4 on the tip side and the hollow main body portion 6 on the rear end side are connected, and an internal space 8 is formed from the tip opening 4A of the insertion portion 4 to the rear end opening 6A of the main body portion, and at least the insertion portion 4 is elastic. When the knife 20 is placed in the internal space 8 so that the cutting edge portion 22 protrudes from the tip opening 4A, the outer shape of the insertion portion 4 is mostly hidden by the outer shape of the cutting edge portion 22 when viewed from the tip side of the cutting edge portion 22, and when the cutting edge portion 22 is inserted into the inside of the eyeball, the insertion portion 4 and the cutting edge portion 22 are inserted into the eyeball. The knife 20 is inserted into the inside of the eyeball together with the tip portion 22, and by removing only the knife 20 from the rear end opening 6A, an installed state is formed in which the insertion portion 4 is located inside the eyeball and the main body portion 6 is located outside the eyeball, and the insertion portion 4 expands, allowing the cutting edge portion 22 to pass through the insertion portion 4. In the installed state, when a surgical instrument 30 is inserted into the insertion portion 4 from the rear end opening 6A, the insertion portion 4 expands and the tip portion of the surgical instrument 30 is inserted into the eyeball, and when the surgical instrument 30 is removed from the rear end opening 6A, the expanded insertion portion 4 returns to its original shape.

[0043] The outer shape of the cutting edge 22 of the knife 20 is larger than the outer shape of the insertion part 4 of the ophthalmic surgical trocar 2, but since the insertion part 4 expands elastically, the cutting edge 22 passes through the insertion part 4 and can be set to protrude from the distal end opening 4A of the insertion part 4. At this time, when viewed from the distal end side of the cutting edge 22, the outer shape of the insertion part 4 is mostly hidden by the outer shape of the cutting edge 22, so that when the cutting edge 22 is inserted into the inside of the eyeball, the insertion part 4 can also be inserted into the inside of the eyeball together with the cutting edge 22. Then, by removing only the knife 22, it is possible to easily form an installation state in which the insertion part 4 is located inside the eyeball and the main body part 6 is located outside the eyeball. Incidentally, when the knife 20 is removed, since the insertion part 4 is elastically deformed, it is possible to remove only the knife while keeping the insertion part inside the eyeball.

[0044] Basically, the knife 20 integrated with the insertion part 4 is simply inserted into the eyeball, so that the insertion part can be reliably inserted into the eyeball without depending on the skill of the surgeon, the time required for installation can be shortened, and the work efficiency can be improved.

[0045] In the installed state, when a surgical instrument 30 with a relatively large outer shape is inserted or removed, the insertion portion 4 elastically deforms but does not move in the insertion direction, so the eyeball follows and it is possible to prevent the outflow of aqueous humor from within the eyeball. In this way, the surgical instrument 30, such as a surgical handpiece, can be safely and reliably inserted and removed, and damage such as crushing or burns to the wound can be prevented.

[0046] This makes it possible to provide a trocar for ophthalmic surgery that enables a surgical instrument having a larger outer shape than forceps to be reliably inserted into the eyeball regardless of the skill of the surgeon.

[0047] In this embodiment, the insertion portion 4 of the ophthalmic surgical trocar 2 can be maintained in an installed state within the eyeball, and not only the surgical instrument 30, which is an ultrasonic handpiece with an irrigation sleeve for cataract surgery, but also other surgical instruments can be inserted to continue vitreous surgery, etc. Furthermore, the ophthalmic surgical trocar 2 according to this embodiment can be applied not only to cataract surgery, but also to glaucoma surgery, corneal transplants, and various other eye surgeries.

[0048] (Trocar system for ophthalmic surgery according to a first embodiment of the present invention) Next, a trocar system for ophthalmic surgery including the trocar 2 for ophthalmic surgery according to the first embodiment will be briefly described with reference to Fig. 6. Fig. 6 is a schematic diagram showing an operation on an eyeball performed using the trocar system for ophthalmic surgery including the trocar for ophthalmic surgery according to the first embodiment of the present invention.

[0049] This ophthalmic surgical trocar system comprises at least an ophthalmic surgical trocar 2 according to the first embodiment described above, and a surgical instrument 30 which is an ultrasonic handpiece comprising an ultrasonic transducer 32 having an opening 32A for aspirating irrigation fluid and the crushed portion, and an irrigation sleeve 34 for supplying irrigation fluid arranged to cover the outer surface of the ultrasonic transducer 32.

[0050] 6 shows the surgical procedure being performed using a hook-shaped surgical auxiliary instrument 70. A side port seal member 50 for preventing the outflow of aqueous humor from within the eyeball is attached to the surgical auxiliary instrument 70. The side port seal member 50 will be described in detail later with reference to Figures 10A and 10B.

[0051] An ophthalmic surgical trocar system comprising at least the ophthalmic surgical trocar 2 according to the first embodiment and a surgical instrument 30 which is an ultrasonic handpiece capable of supplying irrigation fluid, enables the surgeon, regardless of his / her skill level, to safely and reliably insert and remove the surgical instrument, thereby enabling cataract surgery to be performed reliably while preventing damage such as crushing or burns to the wound.

[0052] (Ophthalmic surgical trocar according to a second embodiment of the present invention) Next, an ophthalmic surgical trocar according to a second embodiment of the present invention will be described with reference to Figs. 7 to 8B. Fig. 7 is a side cross-sectional view showing an ophthalmic surgical trocar according to a second embodiment of the present invention, and in particular is a schematic view showing an insertion portion inserted into the inside of an eyeball and a surgical instrument being inserted to perform surgery. Figs. 8A and 8B are views showing an example of an infusion trocar used together with the ophthalmic surgical trocar according to the second embodiment of the present invention, in which Fig. 8A shows a state in which an irrigation fluid tube attached to the internal region of the main body is folded, and Fig. 8B shows a state in which irrigation fluid is supplied to the folded irrigation fluid tube to supply fluid into the eyeball. Figs. 8A and 8B (a) show the infusion trocar 40 as viewed from the rear end opening 44A side of the main body 44, and (b) is a side cross-sectional view showing the section DD of (a).

[0053] The ophthalmic surgical trocar 2' according to the second embodiment of the present invention has a structure basically similar to that of the first embodiment. However, the ophthalmic surgical trocar 2' according to this embodiment is adapted to insert a surgical instrument 30', which is an ultrasonic handpiece without an irrigation sleeve. Since the irrigation sleeve is not provided, the external shape of the surgical instrument 30' is smaller. Therefore, the external shape of the ophthalmic surgical trocar 2' according to the second embodiment can also be made smaller than that of the first embodiment. Therefore, the insertion portion 4 can be inserted into the eyeball more easily.

[0054] However, since the ultrasonic transducer 32 becomes hot during operation and there is no irrigation sleeve or the like covering the outside, it is preferable that the ophthalmic surgical trocar 2' of the second embodiment be formed from a heat-resistant material.

[0055] In this embodiment, an infusion trocar 40 is used to supply perfusion fluid into an eyeball during eye surgery. The infusion trocar 40 has a structure similar to that of the ophthalmic surgery trocar 2 described above. That is, a hollow insertion section 42 at the tip end side is connected to a hollow main body section 44 at the rear end side, an internal space 46 is formed from a tip opening 42A of the insertion section 42 to a rear opening 44A of the main body section 44, and at least the insertion section 42 has elasticity. In a manner similar to that of the ophthalmic surgery trocar 2 described above, an installation state can be created in which the insertion section 42 of the infusion trocar 40 is placed inside the eyeball and the main body section 44 is placed outside the eyeball.

[0056] In the infusion trocar 40, an irrigation fluid tube 48 is further attached to the internal region of the main body portion 44 of the internal space 46. As shown in Fig. 8A, when the irrigation fluid tube 48 is in a folded state, a space for placing the knife 20 is present in the main body portion 44. Fig. 8A shows the state in which the knife 20 used for inserting the insertion portion 42 into the eyeball is being removed from the infusion trocar 40.

[0057] The irrigation fluid tube 48 is made of a resin material or a rubber material that is highly waterproof and elastic. When the irrigation fluid is supplied from the irrigation fluid supply source after the knife 20 is pulled out from the rear end opening 44A, the irrigation fluid tube 48 that was folded by the fluid pressure of the irrigation fluid expands as shown in FIG. 8B, and comes into contact with the entire inner surface of the main body 44 to form a sealed state. This makes it possible to reliably supply the irrigation fluid into the eyeball while suppressing leakage. The irrigation fluid tube 48 preferably has a thickness that provides sufficient rigidity to maintain a sealability, except for the region where the knife 20 is inserted. In addition, the portion of the irrigation fluid tube 48 that is arranged in the region where the knife 20 is inserted is preferably made thinner than the other regions to provide sufficient flexibility.

[0058] In this way, the infusion trocar 40 allows the insertion portion 42 to be reliably inserted into the eyeball regardless of the skill of the surgeon, and furthermore, since the irrigation fluid tube 48 is attached in advance, a state in which irrigation fluid can be supplied can be created with minimal work. The folded, elastic irrigation fluid tube 48 allows the knife 20 to be inserted and removed without interference when the trocar is attached, and by simply supplying irrigation fluid, a sealed state is created by the fluid pressure, allowing irrigation fluid to be reliably supplied into the eyeball.

[0059] (Trocar system for ophthalmic surgery according to a second embodiment of the present invention) Next, a trocar system for ophthalmic surgery including the trocar 2 for ophthalmic surgery according to the second embodiment will be briefly described with reference to Fig. 9. Fig. 9 is a schematic diagram showing an operation on an eyeball performed using the trocar system for ophthalmic surgery including the trocar for ophthalmic surgery and the trocar for infusion according to the second embodiment of the present invention.

[0060] This ophthalmic surgical trocar system comprises at least an ophthalmic surgical trocar 2 according to the second embodiment described above, a surgical instrument 30' which is an ultrasonic handpiece equipped with an ultrasonic transducer 32' having an opening 32A' for aspirating irrigation fluid and the crushed portion, and an infusion trocar 40 for providing irrigation fluid, and the ophthalmic surgical trocar 2' is heat resistant.

[0061] 9 also shows that surgery is performed using a hook-shaped surgical auxiliary instrument 70. A side port seal member 50 for preventing aqueous humor from leaking out of the eyeball is attached to the surgical auxiliary instrument 70. The side port seal member 50 will be described in detail later with reference to Figures 10A and 10B.

[0062] In this system, the surgical instrument 30', which is an ultrasonic handpiece, does not have an irrigation sleeve arranged to cover the outer surface of the ultrasonic transducer 32', so the outer shape of the surgical instrument 30' can be made small. Therefore, the outer shape of the ophthalmic surgical trocar 2' can also be made small, making it easier to insert the ophthalmic surgical trocar 2' into the eyeball. In addition, since the infusion trocar 40 is separately provided, the flow of the irrigation fluid inside the eyeball can be more freely adjusted.

[0063] (Side port seal material) Next, a side port seal member attached to a surgical auxiliary instrument will be described with reference to Figures 10A and 10B. Figure 10A is a perspective view showing one example of a side port seal member attached to a surgical auxiliary instrument. Figure 10B is a perspective view showing another example of a side port seal member attached to a surgical auxiliary instrument.

[0064] The side port seal member 50 attached to the hook-shaped surgical auxiliary instrument 70 is elastic and stretchable. Therefore, the side port seal member 50 is preferably made of any elastic rubber material or resin material, such as silicone. Since the external shape of the surgical auxiliary instrument 70 is small, a side port can be provided by conventional operations performed by an operator without using a trocar as described above, and the tip of the surgical auxiliary instrument 70 can be inserted into the inside of the eyeball. At this time, the side port seal member 50 attached to the surgical auxiliary instrument 70 is arranged in the boundary area between the inside and outside of the eyeball.

[0065] In the example shown in Fig. 10A, the side port sealing member 50 has a smoothly curved shape, and in the example shown in Fig. 10B, the side port sealing member 50 has an expandable and contractible bellows shape. The side port sealing member 50 preferably has an optimal shape according to the shape of the surgical auxiliary instrument 70. In either case, the elastic side port sealing member 50 can prevent the outflow of aqueous humor and the like from within the eyeball.

[0066] An ophthalmic surgical trocar system equipped with the ophthalmic surgical trocars 2, 2' according to the first or second embodiment described above further includes an elastic, stretchable side port seal member 50 that covers the outside of the surgical auxiliary instrument 70, and when the tip of the surgical auxiliary instrument 70 is inserted into the eyeball via a side port provided in the eyeball, the side port seal member 50 can suppress the outflow of aqueous humor and the like from the side port.

[0067] In this way, because the external shape of the surgical auxiliary instrument 70 is small, a side port can be provided in the eyeball without using a trocar with a knife. When the tip of the surgical auxiliary instrument 70 is inserted into the eyeball, the side port seal member 50 can reliably prevent the outflow of aqueous humor and the like from the side port.

[0068] Even if a small amount of aqueous humor or the like flows out from the side port, guide grooves 52 are formed to discharge the outflowing liquid to an area where surgery is unlikely to be affected, regardless of the sealing effect of side port seal member 50. Because guide grooves 52 are formed in side port seal member 50 to guide the flow of aqueous humor or the like that flows out from the side port, the outflowing aqueous humor can be disposed of without interfering with surgery.

[0069] (Contact Lenses) Next, a contact lens that covers the eyeball during surgery will be described with reference to Figures 11A and 11B. Figure 11A is a perspective view that shows a typical example of a contact lens that covers the eyeball during surgery and is used together with a trocar for ophthalmic surgery according to a first embodiment of the present invention. Figure 11B is a perspective view that shows a typical example of a contact lens that covers the eyeball during surgery and is used together with a trocar for ophthalmic surgery according to a second embodiment of the present invention.

[0070] ' During surgery, if the surface of the eyeball dries out, it becomes cloudy, making it difficult for the surgeon to see inside the eyeball. To address this issue, a method of covering the eyeball with a hydrophobic or water-repellent contact lens has been put to practical use, but this cannot be used because it interferes with the above-mentioned ophthalmic surgical trocars 2, 2', infusion trocar 40, surgical auxiliary instrument 70, etc.

[0071] For this reason, the ophthalmic surgical trocar system equipped with the ophthalmic surgical trocars 2, 2' according to the first and second embodiments is equipped with a contact lens 60 as shown in Figures 11A and 11B. More specifically, the contact lens 60 used with the ophthalmic surgical trocars 2, 2' according to the first and second embodiments covers the eyeball during surgery, is hydrophobic or water-repellent, and has a cutout portion 62 to avoid interference with instruments inserted into the eyeball.

[0072] The contact lens 60 shown in Fig. 11A is a contact lens provided in an ophthalmic surgical trocar system including the ophthalmic surgical trocar 2 according to the first embodiment, and has two notches 62 corresponding to the ophthalmic surgical trocar 2 and the surgical auxiliary instrument 70. The contact lens 60 shown in Fig. 11B is a contact lens provided in an ophthalmic surgical trocar system including the ophthalmic surgical trocar 2 according to the second embodiment, and has four notches 62 corresponding to the ophthalmic surgical trocar 2', the infusion trocar 40, the surgical auxiliary instrument 70, and other members.

[0073] As described above, by covering the eyeball with a hydrophobic or water-repellent contact lens having the cutout 62, it is possible to ensure visibility of the inside of the eyeball during surgery without interfering with surgical instruments. Note that the above embodiment is only an example up to the opening stage, and any number of cutouts may be provided and the lens may be made of any other material as long as it does not interfere with the trocar.

[0074] (General Description) (1) The first embodiment of the present invention is A trocar having a hollow insertion portion at a tip end side and a hollow main body portion at a rear end side connected to each other, an internal space being formed from a tip opening of the insertion portion to a rear opening of the main body portion, and at least the insertion portion having elasticity, When the knife is placed in the internal space so that the cutting edge protrudes from the tip opening, the outer shape of the insertion part is mostly hidden by the outer shape of the cutting edge when viewed from the tip side of the cutting edge, and when the cutting edge is inserted into the inside of the eyeball, the insertion part is also inserted into the inside of the eyeball along with the cutting edge, and when only the knife is removed from the rear end opening, an installation state is formed in which the insertion part is located inside the eyeball and the main body part is located outside the eyeball, The insertion portion is expanded so that the cutting edge portion can pass through the insertion portion, This is a trocar for ophthalmic surgery, characterized in that in the installed state, when a surgical instrument is inserted into the insertion portion from the rear end opening, the insertion portion expands and the tip of the surgical instrument is inserted into the eyeball, and when the surgical instrument is removed from the rear end opening, the expanded insertion portion returns to its original shape. (2) The second embodiment of the present invention is the first embodiment, This is a trocar for ophthalmic surgery, characterized in that the outer diameter of the surgical instrument passing through the insertion portion is in the range of 1.5 mm to 4 mm. (3) A third embodiment of the present invention is the first or second embodiment, This is a trocar for ophthalmic surgery, characterized in that the maximum width dimension of the cutting edge portion is greater than or equal to the maximum longitudinal dimension of the outer shape of the insertion portion, and the maximum thickness dimension of the cutting edge portion is greater than or equal to the maximum transverse dimension of the outer shape of the insertion portion. (4) A fourth embodiment of the present invention is any one of the first to third embodiments, This is a trocar for ophthalmic surgery, characterized in that the rear end of the main body has an abutment surface that abuts against the front surface of the knife body, and when the cutting edge is inserted into the inside of the eyeball, the knife body presses against the abutment surface, and the insertion portion is inserted into the inside of the eyeball along with the cutting edge. (5) A fifth embodiment of the present invention is any one of the first to fourth embodiments, This is a trocar for ophthalmic surgery, characterized in that the cutting edge does not have an edge portion formed in the area that comes into contact with the inner surface of the insertion portion when passing through the insertion portion. (6) A sixth embodiment of the present invention is any one of the first to fifth embodiments, A valve formed by an elastic membrane is provided in the main body, This is an ophthalmic surgical trocar, characterized in that when the knife or surgical instrument is inserted into the main body from the rear end opening, the opening of the valve expands in accordance with the outer shape of the knife or surgical instrument, and when the knife or surgical instrument is removed from the rear end opening, the opening of the valve closes.

[0075] (7) A seventh embodiment of the present invention is The ophthalmic surgical trocar according to any one of the first to sixth embodiments; The surgical instrument is an ultrasonic handpiece including an ultrasonic transducer having a suction port for sucking in an irrigation fluid and a crushed portion, and an irrigation sleeve for supplying an irrigation fluid, the irrigation sleeve being arranged to cover the outer surface of the ultrasonic transducer; The present invention relates to a trocar system for ophthalmic surgery, comprising: (8) The eighth embodiment of the present invention is The ophthalmic surgical trocar according to any one of the first to sixth embodiments; The surgical instrument is an ultrasonic handpiece having an ultrasonic transducer with a suction port for sucking the irrigation fluid and the crushed portion; an infusion trocar for providing perfusion fluid; Equipped with The trocar system for ophthalmic surgery is characterized in that the trocar for ophthalmic surgery has heat resistance. (9) A ninth embodiment of the present invention is the eighth embodiment, The infusion trocar has a structure similar to that of the ophthalmic surgical trocar according to the first embodiment, and further has an irrigation fluid tube attached to the internal region of the main body of the internal space, When the irrigation fluid tube is folded, a space for placing a knife is provided in the main body, This is a trocar system for ophthalmic surgery, characterized in that when irrigation fluid is supplied after the knife is withdrawn from the rear end opening, the irrigation fluid tube, which was folded up due to the hydraulic pressure of the irrigation fluid, expands and comes into contact with the entire inner surface of the main body to form a sealed state. (10) A tenth embodiment of the present invention is any one of the seventh to ninth embodiments, Further, a side port seal member having elasticity and capable of stretching and contracting to cover the outside of the surgical auxiliary instrument is provided, This is a trocar system for ophthalmic surgery, characterized in that when the tip of the surgical auxiliary instrument is inserted into the eyeball through a side port provided in the eyeball, the side port seal member suppresses the outflow of aqueous humor from the side port. (11) An eleventh embodiment of the present invention is the method according to the tenth embodiment, The side port seal member has a groove formed therein for guiding the flow of aqueous humor flowing out from the side port. (12) A twelfth embodiment of the present invention is any one of the seventh to eleventh embodiments, This is a trocar system for ophthalmic surgery, characterized in that it covers the eyeball during surgery, has a cutout to avoid interference with instruments inserted into the eyeball, and further comprises a hydrophobic or water-repellent contact lens.

[0076] Although an embodiment of the present invention has been described, the disclosed contents may vary in details of the configuration, and the combination and order of elements in the embodiment may be changed without departing from the scope and spirit of the claimed invention. [Explanation of symbols]

[0077] 2, 2' Ophthalmic Surgery Trocar 4, 4' Insertion 4A, 4A' Tip opening 6, 6' Main body 6A, 6A' rear end opening 8, 8' interior space 10, 10' Elastic thin film 12 Valves 20. Knife 22 Cutting edge 24 Main Unit 30, 30' surgical instruments 32 Ultrasonic transducer 32A aperture 34 Irrigation Sleeve 34A aperture 40 Infusion Trocar 42 Insertion section 42A Tip opening 44 Main body 44A Rear end opening 46 Interior Space 48 Irrigation fluid tube 50 Side port seal material 52 Guide groove 60 Contact Lenses 70 Surgical aids

Claims

1. A trocar having a hollow insertion portion at a tip end side and a hollow main body portion at a rear end side connected to each other, an internal space being formed from a tip opening of the insertion portion to a rear opening of the main body portion, and at least the insertion portion having elasticity, When the knife is placed in the internal space so that the cutting edge protrudes from the tip opening, the outer shape of the insertion part is mostly hidden by the outer shape of the cutting edge when viewed from the tip side of the cutting edge, and when the cutting edge is inserted into the inside of the eyeball, the insertion part is also inserted into the inside of the eyeball along with the cutting edge, and when only the knife is removed from the rear end opening, an installation state is formed in which the insertion part is located inside the eyeball and the main body part is located outside the eyeball, The insertion portion is expanded so that the cutting edge portion can pass through the insertion portion, In the installed state, when a surgical instrument is inserted into the insertion portion from the rear end opening, the insertion portion expands and the tip of the surgical instrument is inserted into the eyeball, and when the surgical instrument is removed from the rear end opening, the expanded insertion portion returns to its original shape.

2. 2. The ophthalmic surgical trocar according to claim 1, wherein the outer diameter of the surgical instrument passing through the insertion portion is in the range of 1.5 mm to 4 mm.

3. 2. The ophthalmic surgical trocar according to claim 1, wherein the maximum width dimension of the cutting edge portion is equal to or greater than the maximum longitudinal dimension of the outer shape of the insertion portion, and the maximum thickness dimension of the cutting edge portion is equal to or greater than the maximum lateral dimension of the outer shape of the insertion portion.

4. 2. The ophthalmic surgical trocar according to claim 1, characterized in that the rear end of the main body portion has an abutment surface that abuts against the front surface of the knife body, and when the cutting edge portion is inserted into the inside of the eyeball, the knife body presses the insertion portion via the abutment surface, so that the insertion portion is inserted into the inside of the eyeball together with the cutting edge portion.

5. 2. The ophthalmic surgical trocar according to claim 1, wherein said cutting edge has no edge in an area that comes into contact with the inner surface of said insertion portion when passing through said insertion portion.

6. A valve formed by an elastic membrane is provided in the main body, 2. The ophthalmic surgical trocar according to claim 1, characterized in that when the knife or surgical instrument is inserted into the main body from the rear end opening, the opening of the valve expands in accordance with the outer shape of the knife or surgical instrument, and when the knife or surgical instrument is removed from the rear end opening, the opening of the valve closes.

7. The ophthalmic surgical trocar according to any one of claims 1 to 6, The surgical instrument is an ultrasonic handpiece including an ultrasonic transducer having a suction port for sucking in an irrigation fluid and a crushed portion, and an irrigation sleeve for supplying an irrigation fluid, the irrigation sleeve being arranged to cover the outer surface of the ultrasonic transducer; A trocar system for ophthalmic surgery comprising:

8. The ophthalmic surgical trocar according to any one of claims 1 to 6, The surgical instrument is an ultrasonic handpiece having an ultrasonic transducer with a suction port for sucking the irrigation fluid and the crushed portion; an infusion trocar for providing perfusion fluid; Equipped with 1. A trocar system for ophthalmic surgery, comprising: a trocar for ophthalmic surgery having heat resistance.

9. The infusion trocar has a structure similar to that of the ophthalmic surgical trocar described in claim 1, and further has an irrigation fluid tube attached to an internal region of the main body of the internal space, When the irrigation fluid tube is folded, a space for placing a knife is provided in the main body, 9. The ophthalmic surgical trocar system according to claim 8, characterized in that when irrigation fluid is supplied after the knife is pulled out from the rear end opening, the irrigation fluid tube, which was folded by the hydraulic pressure of the irrigation fluid, expands and comes into contact with the entire inner surface of the main body to form a sealed state.

10. Further, a side port seal member having elasticity and capable of stretching and contracting to cover the outside of the surgical auxiliary instrument is provided, 8. The ophthalmic surgical trocar system according to claim 7, characterized in that, when the tip of the surgical auxiliary instrument is inserted into the eyeball through a side port provided in the eyeball, the side port seal member suppresses the outflow of aqueous humor from the side port.

11. 11. The trocar system for ophthalmic surgery according to claim 10, wherein the side port seal member is formed with a groove for guiding the flow of aqueous humor flowing out from the side port.

12. The trocar system for ophthalmic surgery according to claim 7, further comprising a hydrophobic or water-repellent contact lens that covers the eyeball during surgery and has a cutout to avoid interference with instruments inserted into the eyeball.

13. Further, a side port seal member having elasticity and capable of stretching and contracting to cover the outside of the surgical auxiliary instrument is provided, 9. The ophthalmic surgical trocar system according to claim 8, wherein when the surgical auxiliary instrument is inserted into the eyeball through a side port provided in the eyeball, the side port seal member suppresses the outflow of aqueous humor from the side port.

14. 14. The trocar system for ophthalmic surgery according to claim 13, wherein the side port seal member is formed with a guide groove for guiding the flow of aqueous humor flowing out from the side port.

15. The trocar system for ophthalmic surgery according to claim 8, further comprising a hydrophobic or water-repellent contact lens that covers the eyeball during surgery and has a cutout to avoid interference with instruments inserted into the eyeball.

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