WO2013125056A1 - 破砕チップ、これを備える眼内手術装置、キャビテーションの発生抑制方法、及び白内障の手術方法 - Google Patents
破砕チップ、これを備える眼内手術装置、キャビテーションの発生抑制方法、及び白内障の手術方法 Download PDFInfo
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- WO2013125056A1 WO2013125056A1 PCT/JP2012/060484 JP2012060484W WO2013125056A1 WO 2013125056 A1 WO2013125056 A1 WO 2013125056A1 JP 2012060484 W JP2012060484 W JP 2012060484W WO 2013125056 A1 WO2013125056 A1 WO 2013125056A1
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- Prior art keywords
- tip
- crushing
- chip
- length
- perfusate
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments
- A61F9/00745—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments using mechanical vibrations, e.g. ultrasonic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
- A61B2017/320072—Working tips with special features, e.g. extending parts
- A61B2017/32008—Working tips with special features, e.g. extending parts preventing clogging of suction channel
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
- A61B2017/320098—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic with transverse or torsional motion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2217/00—General characteristics of surgical instruments
- A61B2217/002—Auxiliary appliance
- A61B2217/007—Auxiliary appliance with irrigation system
Definitions
- the present invention relates to a crushing chip, an intraocular surgical device including the same, a method for suppressing cavitation, and a method for cataract surgery.
- an operation in which an intraocular lens is replaced with an intraocular lens has been often employed.
- ultrasonic emulsification and aspiration PPA
- an ultrasonic handpiece (hereinafter, also simply referred to as “handpiece”) that is an ultrasonic emulsification and suction device is used.
- the handpiece has a rod-like main body supported by the surgeon's hand, and the main body includes a vibrator that generates ultrasonic vibration and a horn that amplifies the ultrasonic vibration generated by the vibrator. Has been.
- a crushing tip for crushing and emulsifying the crystalline lens is attached to the tip of the main body.
- the tubular crushing tip is connected to a horn, and can apply ultrasonic vibration to the lens to be operated.
- the lens is crushed and emulsified by ultrasonic vibration while supplying a perfusate into the anterior chamber of the eye.
- the emulsified lens is discharged together with the perfusate via a suction channel provided in the handpiece.
- Various crushing tips for crushing the crystalline lens have been proposed. For example, there is a flat type as disclosed in Patent Document 1.
- a general crushing tip is formed in a cylindrical shape, and the crushing tip 100 is advanced and retracted using ultrasonic vibration to crush the crystalline lens. Yes. At this time, the crushing tip 100 reciprocates in the perfusate.
- FIG. 14B when the crushing tip 100 is retracted, the crushing tip is separated from the perfusate. Negative pressure near the tip. When such a negative pressure occurs, a so-called cavitation occurs in which the boiling point of the perfusate decreases near the tip of the crushing tip and the perfusate boils to generate bubbles. Such cavitation is not strong enough to emulsify the lens, but may damage the iris and endothelial cells. Further, such cavitation is a problem that can occur not only in a crushing tip that reciprocates linearly but also in a crushing tip that reciprocates.
- the present invention has been made to solve the above problems, and provides a crushing tip, an intraocular surgical device, a cavitation generation suppressing method, and a cataract operating method that can suppress the occurrence of cavitation. Objective.
- a crushing tip according to the present invention is a crushing tip attached to an intraocular surgical device that applies ultrasonic vibration, and is provided at a cylindrical support portion to be attached to the intraocular surgical device, and at a tip of the support portion.
- a cylindrical chip body that communicates with the internal space of the support portion, and the chip body has a cross section in which the length in the first direction is longer than the length in the second direction orthogonal to the first direction.
- the support portion is vibrated so that the chip body rotates reciprocally around the axis of the chip body passing through the centers of the first direction and the second direction.
- the reciprocating rotation of the chip body will be described by referring to the rotation in one direction as the forward rotation and the rotation in the opposite direction as the reverse rotation.
- the chip body according to the present invention has a cross section in which the length in the first direction is longer than that in the second direction, when the crushing chip rotates in the forward direction, one end in the circumferential direction of the surface along the first direction. As the part rotates to push the perfusate, positive pressure is generated in this region. On the other hand, since the other end portion in the circumferential direction of the surface along the first direction rotates away from the perfusate, negative pressure is generated in this region.
- the occurrence of cavitation is suppressed.
- the same phenomenon occurs when the crushing tip rotates in the opposite direction. That is, when rotating in the reverse direction, negative pressure is generated at one end of the surface along the first direction, but the negative pressure is eliminated because the perfusate flows from the other end to the one end, as described above. Is done. Therefore, in the crushing tip according to the present invention, the occurrence of cavitation can be suppressed even when the reciprocating rotation is repeated.
- the rotational center of the reciprocating rotation does not have to be strictly the center in the first direction and the second direction in the chip body, and a slight deviation is allowed as long as the occurrence of the cavitation is suppressed. .
- the chip body has a cross-sectional shape that is long in the first direction as described above, the crushing chip can be easily inserted into the crystalline lens. That is, the nucleus fibers of the crystalline lens extend in a predetermined direction. When a crushing tip is inserted along the nucleus fibers, there is little resistance and the insertion is easy. Therefore, in the present invention, by forming the chip body as described above, insertion into the crystalline lens can be easily performed as compared to a square shape or the like. From such a viewpoint, it is preferable that the length of the chip body in the first direction is, for example, twice or more the length in the second direction.
- the cross section of the chip body can have various shapes in which the length in the first direction is longer than the length in the second direction orthogonal to the first direction. More preferably, the cross-sectional shape is point-symmetric. Specifically, for example, a rectangular shape, an elliptical shape, a rhombus, or the like can be used.
- the chip body When the cross-section of the crushing chip according to the present invention is rectangular, the chip body has a first surface and a second surface extending along the first direction, and a third surface and a second surface extending along the second direction.
- the four surfaces can be formed to face each other.
- projecting portions corner portions projecting radially outward are formed at both ends of the first surface and the second surface. Therefore, for example, when the crushing tip rotates in the forward direction, the protrusion on the one end side of the first surface and the second surface rotates so as to push the perfusate, so that an impact can be applied to the crystalline lens in this portion. . On the other hand, when rotating in the opposite direction, the protrusions on the other end side of the first surface and the second surface rotate so as to push the perfusate, so that an impact is applied at this portion. That is, since the impact can be applied to the crystalline lens at four locations by one reciprocating rotation, the crystalline lens can be efficiently crushed.
- a recess can be formed in the first surface and the second surface.
- the perfusate pushed at one end in the circumferential direction of the first surface flows into the recess as it rotates, and flows to the other end via this recess, so that the perfusate is fed to the one end. It becomes easy to flow from the side to the other end side. As a result, the negative pressure on the other end side can be easily eliminated.
- the perfusate can easily flow from the other end side to the one end side. Therefore, the generation of negative pressure can be further prevented, and the occurrence of cavitation can be reliably suppressed.
- the concave portions of the first surface and the second surface can be formed in an arc shape. If it does in this way, in order to eliminate the negative pressure mentioned above, perfusion fluid can be smoothly poured from the one end side of the 1st surface and the 2nd surface to the other end side, for example.
- arc-shaped convex portions can be provided on the third surface and the fourth surface. If comprised in this way, since the external shape of a circular-arc-shaped convex part follows a rotation direction at the time of rotation of a crushing chip
- the depth of each recess is preferably 1 to 40% of the length of the tip body in the second direction, and is 2 to 40%. More preferably.
- the length of the concave portion in the long side direction can be set to 10 to 60% of the length of the chip body in the first direction.
- An intraocular surgical device includes a main body portion supported by a surgeon's hand, a vibration generating portion that is built in the main body portion and generates ultrasonic vibrations, and is connected to a distal end of the main body portion and the vibrations.
- a vibration generating portion that is built in the main body portion and generates ultrasonic vibrations, and is connected to a distal end of the main body portion and the vibrations.
- One of the above-described crushing tips that is vibrated by the generation unit, and the crushing tip is given vibration from the vibration generation unit so as to reciprocate around the point-symmetrical center.
- the method for suppressing cavitation generation includes the step of preparing any of the above-described crushing tips, and the tip body reciprocally rotates around the axis of the tip body passing through the centers of the first direction and the second direction. And applying ultrasonic vibration to the crushing tip.
- the cataract surgery method according to the present invention includes a step of attaching any of the above-described crushing tips to an intraocular surgical device that applies ultrasonic vibration, and the tip body has centers in the first direction and the second direction. Applying ultrasonic vibration to the crushing tip so as to reciprocate around the axis of the tip body passing therethrough, and supplying a perfusate to the eye of a cataract patient, while the crushing tip allows the lens of the eye of the patient And applying a shock to crushing.
- the occurrence of cavitation can be suppressed.
- tip of FIG. FIG. 4 is a view taken along line AA in FIG. 3. It is operation
- tip of FIG. FIG. 8 is a view taken along line BB in FIG. 7. It is operation
- FIG. It is a front view which shows the other example of the crushing chip
- 3 is a photograph showing a test for confirming the occurrence of cavitation using Example 1.
- FIG. It is a side view which shows the conventional crushing chip
- FIG. 1 is a side view of a handpiece.
- the handpiece according to the present embodiment is formed in a cylindrical shape and includes a main body 1 that is held by an operator's hand, and vibration that generates ultrasonic vibrations in the main body 1.
- a child (not shown) and a horn (not shown) for amplifying the ultrasonic vibration generated by the vibrator are incorporated.
- a tubular crushing tip 2 for crushing and emulsifying the crystalline lens is attached to the tip of the main body 1, and a cylindrical sleeve 5 formed of a flexible material such as silicon is attached to the crushing tip 2. It is arranged to cover the surroundings.
- the sleeve 5 is provided to prevent a portion other than the tip of the crushing tip 2 from coming into contact with the affected part, and the crushing tip 2 protrudes slightly from the tip of the sleeve 5. In the following description and drawings, the sleeve 5 may be omitted.
- the crushing chip 2 is connected to a horn in the main body 1 and can apply ultrasonic vibration to the crystalline lens to be operated.
- the crushing tip 2 is vibrated so as to reciprocate around the axis of the tube (around an axis X described later). For example, the vibration can be applied so as to perform 30,000 to 40,000 reciprocating rotations per minute at a rotation angle of 2 to 4 degrees.
- the outer peripheral surface of the main body 1 is provided with a supply channel 12 for the perfusate extending to the distal end side, so that the perfusate can be supplied from the vicinity of the crushing tip 2 to the anterior chamber in the eye. .
- the crushing chip 2 is formed in a tubular shape, the crushed lens can be sucked together with the perfusate.
- the sucked crystalline lens passes through a suction flow path built in the main body 1 and is discharged from the port 11 at the rear end of the main body 1 to the outside.
- FIGS. 2 is a perspective view of the crushing chip
- FIG. 3 is a side view of FIG. 2
- FIG. 4 is a view taken along the line AA in FIG.
- a direction in which the crushing chip 2 extends from the main body 1 is referred to as an axial direction X
- a direction extending radially from the axis is referred to as a radial direction.
- the crushing tip 2 is made of metal or the like, and is attached to the tip of the main body 11 and extends in a cylindrical shape, and is attached to the tip of the support 21 integrally.
- a chip body 22 for crushing the crystalline lens As described above, the support portion 21 and the chip body 22 are formed in a tubular shape as a whole so that the nucleus of the crushed lens and the perfusate can pass therethrough. That is, a flow path that passes through the chip body 22 and the support portion 21 is formed from the opening at the tip of the chip body 22.
- the chip body 22 is formed in a substantially rectangular parallelepiped shape having a point-symmetric cross section, and the axis X extends so as to penetrate the center (point-symmetric center) of the rectangular cross section.
- the opposing surfaces corresponding to the long sides of the rectangle are referred to as the first surface 221 and the second surface 222, and the opposing surfaces corresponding to the short sides are referred to as the third surface 223 and the fourth surface 224.
- the long side length (length in the first direction) L1 is formed larger than the diameter D1 of the support portion 21, and the short side length (second direction).
- the length L2 is smaller than the diameter D1 of the support portion 21.
- the thickness t of the chip body 22 and the support portion 21 can be substantially constant, but can also be changed.
- the size of the chip body 22 is appropriately determined depending on the mode of surgery, etc.
- the length L1 of the long side can be 0.9 to 1.727 mm
- the length L2 of the short side is 0.8. It can be 24 to 1.1 mm.
- the axial length Lx of the chip body 22 can be set to 1 to 5 mm, for example.
- the length L1 of the long side is preferably about 1 to 7 times, more preferably 2 to 5 times the length L2 of the short side. This is because when the cross section of the chip body 22 is square, it is difficult to insert the chip body 22 into the nucleus fiber of the crystalline lens. On the other hand, if it is too thin, it is difficult to process, and suction of the perfusate or the like becomes difficult.
- the third surface 223 and the fourth surface 224 are formed with arc-shaped convex portions 2230 and 2240 that protrude outward in the radial direction.
- connection part of each adjacent surface comprises the corner
- the connecting portion between the first surface 221 and the third surface 223 is the first corner 201
- the connecting portion between the third surface 223 and the second surface 222 is the second corner 202
- the connecting portion is referred to as a third corner portion 203
- the connecting portion between the fourth surface 224 and the first surface 221 is referred to as a fourth corner portion 204.
- Cataract surgery mainly consists of the following four steps. That is, (1) anterior capsulotomy, (2) phacoemulsification suction, (3) cortical suction, and (4) intraocular lens insertion.
- steps (1) and (2) will be mainly described.
- step (1) the anterior capsule is incised while maintaining the shape of the anterior chamber with a viscoelastic substance or the like.
- step (2) an incision layer is formed in the cornea or sclera, the crushing chip 2 is inserted into the anterior chamber, and the lens is crushed and emulsified by the vibration of the crushing chip 2.
- the emulsified lens is sucked from the tip opening of the crushing chip 2 together with the perfusate, and discharged from the port 11 to the outside through the discharge channel in the handpiece. At this time, the anterior chamber is kept stable by the balance between the inflow amount of the perfusate and the suction amount.
- the clockwise direction in FIG. 5 is referred to as a forward direction R1
- the counterclockwise direction is referred to as a reverse direction R2.
- the crushing tip rotates from the state shown in FIG. 4 to the state shown in FIG. 5A by rotating the angle described above in the forward direction R1, and by rotating in the reverse direction R2 by the same angle, Transition from the state of 5 (a) to the state of FIG. 5 (b) is repeated.
- the crushing tip 2 rotates in the forward direction R1 from the state of FIG. 4 to the state of FIG.
- one end portion of the first surface 221, that is, the first corner portion 201 rotates to push the perfusate, This creates a positive pressure in this region.
- the other end of the first surface 221, that is, the second corner 202 moves in a direction away from the perfusate, and therefore negative pressure is generated in this region.
- the perfusate pushed by the first corner portion 201 moves to the second corner portion 202 side along the first surface 221 as the crushing tip 2 rotates. Thereby, the negative pressure generated in the vicinity of the second corner portion 202 is eliminated.
- a similar phenomenon occurs in the second surface 222, and the negative pressure generated in the vicinity of the fourth corner portion 204 is eliminated by the perfusate flowing along the second surface 222 from the third corner portion 203.
- the first corner portion 201 and the third corner portion 203 give an impact to the crystalline lens and crush it.
- the crushing tip 2 rotates in the reverse direction R2 from the state of FIG. 5A to the state of FIG. 5B
- the first corner 201 which is one end of the first surface 221 is removed from the perfusate. Since it rotates in the direction of separation, the vicinity thereof has a negative pressure, but since the perfusate flows from the vicinity of the second corner 202 that becomes a positive pressure toward the first corner 201, the vicinity of the first corner 201 Negative pressure is eliminated.
- the third corner 203 which is one end of the second surface 222, rotates in a direction away from the perfusate, so that the vicinity thereof has a negative pressure, but the fourth corner 204 to the third corner becomes a positive pressure.
- the perfusate flows toward the portion 203, the negative pressure near the third corner portion 203 is eliminated.
- the second corner portion 202 and the fourth corner portion 204 give an impact to the crystalline lens and perform crushing. While repeating the above, each of the corners 201 to 204 impacts the crystalline lens and crushes it.
- the chip body 22 is formed in a rectangular shape in cross section, the other end portion of the first surface 221 from the positive pressure region formed at one end portion of the first surface 221.
- the perfusate can be applied to the negative pressure region formed in step (b). That is, the perfusate in the positive pressure region flows along the first surface 221 as it rotates and moves to the negative pressure region. Thereby, the negative pressure is eliminated. Since such a phenomenon also occurs on the second surface 222, it is possible to prevent a negative pressure region from being formed in the surrounding perfusate while the crushing tip 2 is rotating. As a result, cavitation can be suppressed and damage to the eyeball such as an iris can be prevented.
- each of the corner portions 201 to 204 can apply an impact to the lens while the crushing chip 2 is reciprocated once, the lens can be efficiently crushed. Furthermore, since the chip body 22 is elongated in a rectangular cross section, the lens can be easily inserted into the nucleus fiber. Further, the third surface 223 and the fourth surface 224 are formed with arc-shaped convex portions 2230 and 2240, but the curves of the convex portions 2230 and 2240 are along the rotation direction of the crushing tip 2. No negative pressure is generated in this region. Moreover, since there is little resistance with respect to a perfusate, it can prevent that the resistance with respect to rotation of the crushing chip
- the cross section of the chip body 22 is rectangular, but the present invention is not limited to this. That is, if the cross section has a point-symmetric shape in which the length in the longitudinal direction (first direction) is longer than the length in the width direction (second direction) perpendicular thereto, the above-described effects can be obtained. it can. Therefore, for example, the third surface 223 and the fourth surface 224 can have various shapes such as an elliptical shape and a rhombus shape in addition to a rectangular shape having no protrusions.
- FIGS. 6 is a perspective view of a crushing tip according to the second embodiment
- FIG. 7 is a side view of FIG. 6
- FIG. 8 is a view taken along the line BB in FIG.
- the direction in which the crushing chip extends from the main body 1 is referred to as an axial direction X
- the direction extending radially from the axis is referred to as a radial direction.
- the crushing tip 3 is made of metal or the like, and is attached to the tip of the main body 11 and is attached to the tip of the support 31 in an integrated manner.
- a chip body 32 for crushing the crystalline lens is formed in a tubular shape as a whole as described above, and the crushed lens nucleus and perfusate pass therethrough. That is, a flow path that passes through the chip body 32 and the support portion 31 is formed from the opening at the tip of the chip body 32.
- the chip body 32 is formed in a substantially rectangular parallelepiped shape having a point-symmetrical rectangular cross section, and the axis X extends so as to penetrate the point-symmetrical center of the rectangular cross section.
- the opposing surfaces corresponding to the long sides of the rectangle are referred to as a first surface 321 and a second surface 322, and the opposing surfaces corresponding to the short sides are referred to as a third surface 323 and a fourth surface 324.
- the long side length L1 is formed larger than the diameter D1 of the support portion 31, and the short side length L2 is formed smaller than the diameter D1 of the support portion 31.
- the thickness t of the chip body 32 and the support portion 31 can be substantially constant, but can also be changed.
- the size of the chip main body 32 is appropriately determined depending on the mode of surgery and the like.
- the long side length L1 can be set to 0.9 to 1.727 mm, and the short side length L2 is set to 0.8. It can be 24 to 1.1 mm.
- the axial length Lx of the chip body 32 can be set to 1 to 5 mm, for example.
- the length L1 of the long side is preferably about 1 to 7 times, more preferably 2 to 5 times the length L2 of the short side. This is because when the cross section of the chip body 32 is square, it is difficult to insert the chip body 32 into the nucleus fibers of the crystalline lens. On the other hand, if it is too thin, it is difficult to process, and suction of the perfusate or the like becomes difficult.
- the first surface 321 and the second surface 322 described above are respectively formed with arc-shaped concave portions 3210 and 3220 that are recessed inward in the radial direction, and the third surface 323 and the fourth surface 324 have respective diameters. Arc-shaped convex portions 3230 and 3240 projecting outward in the direction are formed. Moreover, the connection part of each adjacent surface comprises the corner
- the connection portion between the first surface 321 and the third surface 323 is the first corner portion 301
- the connection portion between the third surface 323 and the second surface 322 is the second corner portion 302, and the second surface 322 and the fourth surface 324.
- the connecting portion is referred to as a third corner portion 303, and the connecting portion between the fourth surface 324 and the first surface 321 is referred to as a fourth corner portion 304.
- Cataract surgery mainly consists of the following four steps. That is, (1) anterior capsulotomy, (2) phacoemulsification suction, (3) cortical suction, and (4) intraocular lens insertion.
- steps (1) and (2) will be mainly described.
- step (1) the anterior capsule is incised while maintaining the shape of the anterior chamber with a viscoelastic substance or the like.
- step (2) an incision layer is formed in the cornea or sclera, the crushing chip 2 is inserted into the anterior chamber, and the lens is crushed and emulsified by vibration of the crushing chip 3.
- the emulsified lens is sucked from the tip opening of the crushing chip 3 together with the perfusate, and discharged from the port 11 to the outside through the discharge channel in the handpiece. At this time, the anterior chamber is kept stable by the balance between the inflow amount of the perfusate and the suction amount.
- the clockwise direction in FIG. 9 is referred to as a forward direction R1
- the counterclockwise direction is referred to as a reverse direction R2.
- the crushing tip rotates from the state shown in FIG. 8 to the state shown in FIG. 9A by rotating the above-described angle in the forward direction R1, and by rotating in the reverse direction R2 by the same angle, Transition from the state of 9 (a) to the state of FIG. 9 (b) is repeated.
- the crushing tip 3 rotates in the reverse direction R2 from the state of FIG. 9A to the state of FIG. 9B
- the first corner portion 301 that is one end portion of the first surface 321 is removed from the perfusate. Since it rotates in the direction away from it, the vicinity thereof has a negative pressure, but since the perfusate flows along the concave portion 3210 from the vicinity of the second corner portion 302 that becomes a positive pressure toward the first corner portion 301, The negative pressure near the corner portion 301 is eliminated.
- the third corner 303 which is one end of the second surface 322, rotates in a direction away from the perfusate, so that the vicinity thereof has negative pressure, but the fourth corner 304 from the fourth corner 304 that becomes positive pressure has a third corner. Since the perfusate flows along the concave portion 3220 toward the portion 303, the negative pressure in the vicinity of the third corner portion 303 is eliminated.
- the second corner portion 302 and the fourth corner portion 304 give an impact to the crystalline lens and perform crushing. While repeating the above, each of the corner portions 301 to 304 impacts the crystalline lens and crushes it.
- the chip body 32 is formed in a rectangular shape in cross section, and the recesses 3210 and 3220 are formed in the first surface 321 and the second surface 322 constituting the long side, respectively.
- the perfusate can flow from the positive pressure region formed at one end of the recesses 3210 and 3220 to the negative pressure region formed at the other end of the recesses 3210 and 3220. That is, the perfusate in the positive pressure region flows into the recesses 3210 and 3220 as it rotates, and moves to the negative pressure region. Thereby, the negative pressure is eliminated, and it is possible to prevent a negative pressure region from being formed in the surrounding perfusate while the crushing tip 3 is rotating. As a result, the occurrence of cavitation can be suppressed, and damage to the eyeball such as the iris can be prevented.
- the depth L3 of the recesses 3210 and 3220 is preferably about 2 to 40% of the length L2 of the short side, and more preferably 2 to 20%.
- the length L4 of the recesses 3210 and 3220 in the long side direction of the chip body 32 is preferably 10 to 60%, more preferably 40 to 60% with respect to the length L1 of the long side. preferable.
- the length L2 of the recesses 3210 and 3220 is generally defined with the protrusions 301 to 304 as described above as both ends.
- each of the corner portions 301 to 304 can give an impact to the lens while the crushing tip 3 rotates once, the lens can be efficiently crushed. Furthermore, since the chip body 32 is formed in an elongated shape with a rectangular cross section, the lens can be easily inserted into the nucleus fiber. Further, the third surface 323 and the fourth surface 324 are formed with arc-shaped convex portions 3230 and 3240, but the curves of the convex portions 3230 and 3240 are along the rotation direction of the crushing tip 3. No negative pressure is generated in this region. Moreover, since there is little resistance with respect to a perfusate, it can prevent that the resistance with respect to rotation of the crushing chip
- each corner portion 301 to 304 of the chip body is formed by a curved surface, but for example, it is formed by a sharp corner as shown in FIG. You can also.
- the tip opening of the chip body is perpendicular to the axis X.
- the opening 328 may be inclined.
- the shape of the support portions 21 and 31 may be other than a cylinder or a square tube.
- the axis X of the support portions 21 and 31 passes through the center of the cross section of the chip body 22 and 32, but does not necessarily pass through the center.
- the axis X may be slightly inclined with respect to the direction in which the chip bodies 22 and 32 extend.
- Each of the chip bodies 22 and 32 has a cross section having a long side and a short side.
- the shape of the chip body is such that the length in one direction (first direction) is perpendicular to the width direction (first direction). Any shape can be used as long as it has a cross section longer than the length in two directions.
- a line-symmetric cross-sectional shape is preferable, and a point-symmetric cross-sectional shape is more preferable.
- the present invention is not limited to the following examples.
- the crushing chip which concerns on three types of Examples and one type of comparative example was produced, and generation
- Each Example produced the crushing chip which has the cross section of FIG. 8 mentioned above, and the front-end
- the comparative example is a crushing tip composed of a cylindrical support portion connected to the handpiece and a tip portion bent at the tip.
- the diameter is 0.9 mm
- the tip angle is 30 degrees
- the bent tip portion has a bending angle of 20 degrees.
- FIG. 12 is a photograph showing a state of the test using the comparative example
- FIG. 13 is a photograph showing a state of the test using the example 1.
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Abstract
Description
本発明に係る白内障の手術方法は、上述したいずれかの破砕チップを、超音波振動を付与する眼内手術装置に取り付けるステップと、前記チップ本体が、前記第1方向及び第2方向の中心を通る当該チップ本体の軸線周りに往復回転するように、前記破砕チップに超音波振動を付与するステップと、白内障患者の眼に灌流液を供給しつつ、前記破砕チップにより、当該患者の眼の水晶体に衝撃を付与し破砕を行うステップと、を備えている。
図1は、ハンドピースの側面図である。同図に示すように、本実施形態に係るハンドピースは、円筒状に形成され、手術者の手で持たれる本体部1を備えており、この本体部1に、超音波振動を発生する振動子(図示省略)と、この振動子によって発生した超音波振動を増幅するホーン(図示省略)とが内蔵されている。そして、本体部1の先端には、水晶体を破砕して乳化するための管状の破砕チップ2が装着されるとともに、シリコンなどの柔軟な材料で形成された筒状のスリーブ5が破砕チップ2の周囲を覆うように配置されている。スリーブ5は、破砕チップ2の先端以外の部分が患部に接触するのを防止するために設けられるものであり、スリーブ5の先端からは、破砕チップ2がわずかに突出するようになっている。なお、以下の説明、図面では、スリーブ5を省略して説明することがある。破砕チップ2は本体部1内のホーンと連結されており、手術対象となる水晶体に超音波振動を付与することができる。この破砕チップ2は、管の軸周り(後述する軸線X周り)に往復回転するように振動が付与される。例えば、2~4度の回転角度で、1分間に3万~4万回の往復回転を行うように振動を付与することができる。そして、本体部1の外周面には、先端側へ延びる灌流液の供給流路12が設けられており、破砕チップ2の近傍から眼内の前房へ灌流液を供給できるようになっている。また、破砕チップ2は、管状に形成されているため、破砕した水晶体を灌流液とともに吸引できるようになっている。吸引された水晶体は、本体部1に内蔵された吸引流路を通過し、本体部1の後端のポート11から外部へ排出される。
次に、破砕チップ2の第1実施形態について図2~図4を参照しつつ詳細に説明する。図2は破砕チップの斜視図、図3は図2の側面図、図4は図3のA-A線矢視図である。以下では、本体部1から破砕チップ2の延びる方向を軸方向X、この軸線から放射状に延びる方向を径方向と称することとする。
次に、破砕チップの第2実施形態について図6~図8を参照しつつ詳細に説明する。図6は第2実施形態に係る破砕チップの斜視図、図7は図6の側面図、図8は図7のB-B線矢視図である。以下では、本体部1から破砕チップの延びる方向を軸方向X、この軸線から放射状に延びる方向を径方向と称することとする。
2、3 破砕チップ
21、31 支持部
22、32 チップ本体
221、321 第1面
2210、3210 凹部
222、322 第2面
2220、3220 凹部
223、323 第3面
2230、3230 凸部
224、324 第4面
2240、3240 凸部
Claims (7)
- 超音波振動を付与する眼内手術装置に取り付けられる破砕チップであって、
前記眼内手術装置に装着される筒状の支持部と、
前記支持部の先端に設けられ、当該支持部の内部空間と連通する筒状のチップ本体と、を備え、
前記チップ本体は、第1方向の長さが、これと直交する第2方向の長さよりも長い形状を断面として有し、
前記支持部には、前記チップ本体が前記第1方向及び第2方向の中心を通る当該チップ本体の軸線周りに往復回転するように振動が付与される、破砕チップ。 - 前記チップ本体は、長方形状の断面を有している、請求項1に記載の破砕チップ。
- 前記チップ本体は、楕円状の断面を有している、請求項1に記載の破砕チップ。
- 前記チップ本体の第1方向の長さが、前記第2方向の長さの2倍以上である、請求項1から3のいずれかに記載の破砕チップ。
- 手術者の手で支持される本体部と、
前記本体部に内蔵され、超音波振動を発生する振動発生部と、
前記本体部の先端に連結され前記振動発生部により振動される、請求項1から4のいずれかに記載の破砕チップと、を備え、
前記破砕チップは、前記第1方向及び第2方向の中心を通る当該チップ本体の軸線周りに往復回転するように前記振動発生部から振動を付与される、眼内手術装置。 - 請求項1から4のいずれかに記載の破砕チップを準備するステップと、
前記チップ本体が、前記第1方向及び第2方向の中心を通る当該チップ本体の軸線周りに往復回転するように、前記破砕チップに超音波振動を付与するステップと、
を備えている、キャビテーションの発生抑制方法。 - 請求項1から4のいずれかに記載の破砕チップを、超音波振動を付与する眼内手術装置に取り付けるステップと、
前記チップ本体が、前記第1方向及び第2方向の中心を通る当該チップ本体の軸線周りに往復回転するように、前記破砕チップに超音波振動を付与するステップと、
白内障患者の眼に灌流液を供給しつつ、前記破砕チップにより、当該患者の眼の水晶体に衝撃を付与し破砕を行うステップと、
を備えている、白内障の手術方法。
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
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KR20147020374A KR20140130108A (ko) | 2012-02-20 | 2012-04-18 | 파쇄팁, 파쇄팁을 구비한 안내 수술장치, 캐비테이션의 발생 억제방법, 및 백내장 수술방법 |
BR112014020424-1A BR112014020424A2 (ja) | 2012-02-20 | 2012-04-18 | A crush chip, an operation system in an eye provided with this, a generating inhibition method of a cavitation, and an operation method of a cataract |
EP12869249.8A EP2818143B1 (en) | 2012-02-20 | 2012-04-18 | Fragmentation tip and intraocular surgery device provided with same |
ES12869249T ES2822582T3 (es) | 2012-02-20 | 2012-04-18 | Punta de fragmentación y dispositivo de cirugía intraocular provisto de la misma |
CA2862278A CA2862278A1 (en) | 2012-02-20 | 2012-04-18 | Fragmentation tip, intraocular surgery device provided with same, me thod for suppressing occurrence of cavitation, and use of the fragmentation tip in the treatment of cataracts |
MX2014009987A MX2014009987A (es) | 2012-02-20 | 2012-04-18 | Punta de fragmentacion, dispositivo de cirugia intraocular provisto con la misma, metodo para suprimir la aparicion de cavitacion, y metodo de cirugia de cataratas. |
CN201280070248.4A CN104135977B (zh) | 2012-02-20 | 2012-04-18 | 破碎头和具有其的眼内手术装置 |
US14/372,158 US9962289B2 (en) | 2012-02-20 | 2012-04-18 | Fragmentation tip, intraocular surgery device provided with same, method for suppressing occurrence of cavitation, and cataract surgery method |
JP2014500848A JP5923592B2 (ja) | 2012-02-20 | 2012-04-18 | 破砕チップ、これを備える眼内手術装置、キャビテーションの発生抑制方法、及び白内障の手術方法 |
RU2014138043/14A RU2599681C2 (ru) | 2012-02-20 | 2012-04-18 | Наконечник для дробления, устройство для внутриглазных хирургических операций, снабженное таким наконечником, способ подавления возникновения кавитации и способ выполнения хирургической операции по удалению катаракты |
PH12014501624A PH12014501624A1 (en) | 2012-02-20 | 2014-07-15 | Fragmentation tip, introcular surgery device provided with same, method for suppressing occurrence of cavitation, and cataract surgery method |
Applications Claiming Priority (2)
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JP2012-034462 | 2012-02-20 | ||
JP2012034462 | 2012-02-20 |
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US (1) | US9962289B2 (ja) |
EP (1) | EP2818143B1 (ja) |
JP (1) | JP5923592B2 (ja) |
KR (1) | KR20140130108A (ja) |
CN (1) | CN104135977B (ja) |
BR (1) | BR112014020424A2 (ja) |
CA (1) | CA2862278A1 (ja) |
ES (1) | ES2822582T3 (ja) |
MX (1) | MX2014009987A (ja) |
PH (1) | PH12014501624A1 (ja) |
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Cited By (2)
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US10596034B2 (en) | 2016-07-27 | 2020-03-24 | Tadahiko Kozawa | Crushing tip for eye surgery |
WO2021193546A1 (ja) * | 2020-03-24 | 2021-09-30 | 株式会社ニデック | 破砕チップ |
Families Citing this family (2)
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USD974558S1 (en) | 2020-12-18 | 2023-01-03 | Stryker European Operations Limited | Ultrasonic knife |
KR102631851B1 (ko) * | 2021-05-18 | 2024-01-31 | 주식회사 오큐라이트 | 백내장 수술용 챠퍼 니들 |
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- 2012-04-18 MX MX2014009987A patent/MX2014009987A/es unknown
- 2012-04-18 KR KR20147020374A patent/KR20140130108A/ko not_active Application Discontinuation
- 2012-04-18 CN CN201280070248.4A patent/CN104135977B/zh not_active Expired - Fee Related
- 2012-04-18 RU RU2014138043/14A patent/RU2599681C2/ru not_active IP Right Cessation
- 2012-04-18 ES ES12869249T patent/ES2822582T3/es active Active
- 2012-04-18 BR BR112014020424-1A patent/BR112014020424A2/ja not_active IP Right Cessation
- 2012-04-18 CA CA2862278A patent/CA2862278A1/en not_active Abandoned
- 2012-04-18 WO PCT/JP2012/060484 patent/WO2013125056A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
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EP2818143A1 (en) | 2014-12-31 |
BR112014020424A2 (ja) | 2018-01-30 |
EP2818143A4 (en) | 2015-09-23 |
CN104135977B (zh) | 2017-03-01 |
CA2862278A1 (en) | 2013-08-29 |
CN104135977A (zh) | 2014-11-05 |
RU2014138043A (ru) | 2016-04-10 |
US20150073459A1 (en) | 2015-03-12 |
RU2599681C2 (ru) | 2016-10-10 |
KR20140130108A (ko) | 2014-11-07 |
PH12014501624A1 (en) | 2014-10-13 |
JPWO2013125056A1 (ja) | 2015-07-30 |
EP2818143B1 (en) | 2020-09-09 |
ES2822582T3 (es) | 2021-05-04 |
US9962289B2 (en) | 2018-05-08 |
JP5923592B2 (ja) | 2016-05-24 |
MX2014009987A (es) | 2014-09-16 |
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