JP2009240622A - Phacoemulsification chip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable to provide vibrations assuredly and efficiently to a crystalline lens nucleus. <P>SOLUTION: The open distal end of a cylindrical phacoemulsification chip 1, which is attached to the distal end of a handpiece body 3 to use, incdlues a plurality of projections 15 with a sharp chip for entering a crystals; and vibrations are provided from outside and inside while a plurality of the projections 15 hold a crystalline nucleus. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to ultrasonic emulsification and aspiration that removes cloudy cataract from a patient diagnosed with cataract.
(Ultrasound Phacoemulsification and Aspiration)

  In general, when cataract progresses to a state where life is disturbed, surgery is performed to remove the cloudy lens cortex and nucleus.

  The lens is located behind the cornea and consists of a cortex and a lens core surrounded by the cortex in the capsule. During surgery, the lens capsule and cortex are separated by water to facilitate aspiration and removal. This is done after making the lens nucleus easy to move.

  For surgery, a surgical instrument called a handpiece that can be held with one hand is used. The tip of the handpiece is a tip for ultrasonic emulsification and suction, and has a structure in which vibration is given by a vibrator provided in the handpiece body.

  The outline of the operation is that an ultrasonic emulsification tip is inserted through an incision opened next to the cornea, the tip of the inserted ultrasonic emulsification tip is applied to the lens nucleus, and the tip is placed in the nucleus. It is sucked in and given a vibration, and the lens nucleus is sucked from the opening of the tip while breaking the lens nucleus in order. The operation terminating the lens nucleus into a state where it can be aspirated is referred to as an ultrasonic emulsification aspiration. By repeating this operation, the nucleus and cortex of the lens are removed, and then an intraocular lens is inserted.

  A tip for ultrasonic emulsification and aspiration that sucks and removes cloudy cataracts has both a function of being squeezed into a lens nucleus and finely pulverized by vibration, and a function of sucking a broken lens nucleus.

  In addition to the suction function, the ultrasonic emulsification suction tip has a function of applying vibration to the lens nucleus as described above, and the tip edge of the tip of the ultrasonic emulsification suction tip is brought into contact with the lens core to increase the height of the tip. The nucleus is changed into a fine lump by vibration.

  At this time, the lens nucleus is separated from the cortex by water as described above and is in an unstable state that is easy to move. Therefore, when the tip edge of the tip of the ultrasonic emulsification suction tip is brought into contact with the lens nucleus, high vibration of the chip is caused. When pressing, the nucleus escaped forward and had the problem of not being able to exert a reliable crushing effect.

  If vibration cannot be applied reliably, it will take a long time to break up to a state where it can be sucked. Furthermore, when the nuclear fragment pops out when it is pushed forward and moves inside the eye with a water stream, it may hit the inside of the cornea and cause irreproducible corneal endothelial cell damage. A long time is a load on the patient, and it is desirable that the load on the patient be as short as 1 minute or 1 second, which leads to quick recovery.

  Accordingly, an object of the present invention is to provide an ultrasonic emulsion suction tip for cataract surgery that can reliably and efficiently vibrate the lens nucleus during cataract surgery. And

  In order to achieve the above object, according to the present invention, there is provided an ultrasonic emulsification aspiration tip that is vibrated by a vibrator provided at a tip of a handpiece body, wherein the ultrasonic emulsification aspiration tip Is characterized in that it has a plurality of pointed projections at the tip opening tip formed in a cylindrical shape.

  ADVANTAGE OF THE INVENTION According to this invention, the front-end | tip of the ultrasonic emulsion suction tip can be easily sunk into a crystalline lens nucleus at the time of a cataract operation. This makes it possible to easily and reliably retain the nucleus of important elements by the nuclear splitting method.

  In addition, the action of pressing the lens nucleus with a chip with multiple protrusions and the action of high-frequency vibration in the lens nucleus can be obtained simultaneously and efficiently compared to the conventional chip, so it is possible to quickly absorb and remove the lens nucleus. Thus, the load on the patient can be reduced. It can lead to a quick recovery.

  In carrying out the present invention, first, the plurality of protrusions are formed by a plurality of cut grooves formed along the axial direction from the tip edge of the tip of the ultrasonic emulsification suction chip formed in a cylindrical shape. Therefore, it is desirable to make it easy to manufacture.

  Secondly, the tip for ultrasonic emulsification suction is provided with an inclined inclined surface formed in a V-groove shape with the groove bottom facing on the axis crossing the edge of the opening at the tip opening tip. It is desirable to obtain a stable and reliable holding state of the lens nucleus during operation.

  Hereinafter, the first embodiment of the present invention will be described in detail with reference to the drawings of FIGS.

  FIG. 1 is a front view showing a tip for ultrasonic emulsification and aspiration used in cataract surgery according to the present invention, FIG. 3 is a plan view, and FIG. 4 is a bottom view.

  The tip 1 for ultrasonic emulsification suction is used by being attached to the tip of the handpiece body 3 as shown in FIGS.

  The tip 1 for ultrasonic emulsification and aspiration comprises a nozzle portion 5 formed in a cylindrical shape and a male screw portion 7 as an attachment portion, and the inside is a tip suction passage 11 penetrating therethrough. The whole is made of titanium or stainless steel.

  The tip opening tip of the ultrasonic emulsification suction tip 1 is an inclined cut surface 13 cut at a predetermined angle θ as shown in FIG. A number of angles can be considered as the angle θ depending on the operator's preference. Usually, there are many ranges of 30 ° to 90 °.

  As shown in FIG. 11, a plurality of pointed projections 15 are provided integrally and continuously at the tip region that becomes the inclined cut surface 13.

  The plurality of protrusions 15 are formed by inserting a plurality of cut grooves 17 along the axial direction from the leading edge that becomes the inclined cut surface 13.

  The number of the cut grooves 17 may be two or three, and in the case of two, three protrusions 15 are formed as shown in FIG. In the case of three, four protrusions 15 are formed as shown in FIG.

  In this case, the combination of the angle θ of the inclined cut surface 13 and the number of the protrusions 15 is arbitrary.

  Further, when the tip of the tip of the ultrasonic emulsification suction technique 1 is not the inclined cut surface 13, it is also possible to provide a pointed protrusion 15 over the entire tip opening tip. Depending on the preference of the surgeon, the number, shape and extent of protrusions at the tip of the tip can vary.

  Note that the tips of the plurality of protrusions 15 need to take into account the balance between the nuclear crushing effect and the possibility of damage to other parts. Usually, a sharp tip edge that is the same as the tip tip angle may be used.

  On the other hand, the male screw portion 7 which is the attachment portion of the ultrasonic emulsification suction chip 1 is screwed with the female screw portion 21 of the coupling portion 19 provided at the distal end portion of the handpiece body 3 as shown in FIGS. Yes.

  The handpiece main body 3 is a pen type that can be held with one hand, and has a water passage 25 and a main body suction passage 27 in addition to the vibrator 23 inside.

  The connecting portion 19 is movably supported on the inner wall of the handpiece body 3 via a supporting means (not shown) that also serves as a seal.

  The vibrator 23 is interlocked and connected to the ultrasonic emulsification suction chip 1 through the coupling portion 19, and vibrates by the electric power input from the input terminal 29, so that the ultrasonic emulsification suction is performed through the coupling portion 19. A short streak vibration in the axial direction (arrow a in FIG. 10) is applied to the surgical tip 1. Specifically, for example, 40 kHz ultrasonic vibration is suitable.

  As shown in FIG. 10, the main body suction passage 27 has a shape that passes through the center of the coupling portion 19 provided with the female screw portion 21, and one of the main body suction passages 27 of the ultrasonic emulsification suction chip 1 is interposed through the coupling portion 19. The tip suction passage 11 and the other communicate with the collection package 31 from the connection terminal 30 via the suction pump P.

  Therefore, the ultrasonic emulsifying and aspirating tip 1 can obtain both functions of the suctioning action of sucking from the tip of the tip opening together with the vibration action by the vibrator 23.

  The water passage 25 is provided along the outer periphery of the connecting portion 19, one is the discharge port 35 of the sleeve cover 33 made of silicon, and the other is extended along the outer periphery of the handpiece body 3. Each communicates with a water tap outside the figure.

  The sleeve cover 33 covers the attachment region of the ultrasonic emulsification suction chip 1 so that a gap created between the inner wall of the cover and the outer periphery of the ultrasonic emulsification suction chip 1 becomes a passage continuing to the discharge port 35, and the coupling The shape communicates with the water passage 25 on the outer periphery of the portion 19.

  The water from the discharge port 35 separates the lens capsule and the cortex to facilitate movement of the lens nucleus, and if the suction is continued during the suction of the lens nucleus, the anterior chamber collapses. , (Artificial aqueous humor) is used to keep the anterior chamber constant by refluxing. In addition, the artificial aqueous humor has the effect of suppressing the heat generation due to the vibration of the ultrasonic tip and preventing the ocular tissue from being damaged.

  According to the ultrasonic emulsification / aspiration tip 1 configured as described above, for example, when the tip of the ultrasonic emulsification / aspiration tip 1 is pressed against the crystalline lens nucleus 39 during a cataract operation as shown in FIG. A plurality of pointed protrusions 15 formed in a plurality of states are easily entered into the lens nucleus 39.

  At this time, since the plurality of protrusions 15 have an action of pressing the lens nucleus 39 and an action of applying vibration from the inside of the lens nucleus 39, the lens nucleus 39 is surely finely divided by vibration given from inside and outside. The suction and removal of the nucleus 39 is completed quickly.

  13 to 21 show a second embodiment of the tip 1 for ultrasonic emulsification and aspiration.

  The tip 1 for ultrasonic emulsification and aspiration comprises a nozzle portion 5 and a male screw portion 7 as an attachment portion, and the attachment to the tip of the handpiece body 3 is the same as in the first embodiment. The difference is that the tip end portion of the tip of the ultrasonic emulsification and suction technique 1 is provided with opposing inclined surfaces 41 and 43 formed in a V-groove shape with the groove bottom P facing the axis X crossing the tip end edge of the opening. It is to make. The V-groove facing inclined surfaces 41 and 43 are asymmetrical, one being long and the other being short, but they may be symmetric as shown in FIG.

  Therefore, according to the second embodiment, in addition to the operation and effects of the first embodiment, the lens core 39 is held by the opposed inclined surfaces 41 and 43 in the V-groove shape when sucked as shown in FIG. Since it is in a stable state, reliable and quick suction can be performed. Moreover, since one opposing inclined surface 43 is short, there is an advantage that suction and removal can be performed while confirming the position of the projection 15 in the lens nucleus 39 that is a narrow place through the cornea.

The front view of the chip | tip for ultrasonic emulsification suction techniques concerning this invention. The rear view of the chip | tip for ultrasonic emulsification suction techniques. The top view of the chip | tip for ultrasonic emulsion suction techniques. The bottom view of the chip | tip for ultrasonic emulsion suction techniques. The right view of the chip | tip for ultrasonic emulsion suction techniques. The left view of the chip | tip for ultrasonic emulsion suction techniques. The AA sectional view of Drawing 3 of a chip for ultrasonic emulsification aspiration. The disassembled perspective view which removed the chip | tip for ultrasonic emulsification suction surgery from the handpiece main body. Explanatory drawing of the whole handpiece which attached the chip | tip for ultrasonic emulsification suction techniques. The expansion outline sectional view of the tip part for ultrasonic emulsification aspiration. An enlarged explanatory view showing a plurality of pointed projections. Explanatory drawing of expansion operation of a projection part. The front view which showed 2nd Embodiment of the chip | tip for ultrasonic emulsion suction techniques. The rear view of the chip | tip for ultrasonic emulsification suction techniques. The right view of the chip | tip for ultrasonic emulsion suction techniques. The left view of the chip | tip for ultrasonic emulsion suction techniques. The top view of the chip | tip for ultrasonic emulsion suction techniques. The bottom view of the chip | tip for ultrasonic emulsion suction techniques. BB sectional drawing of the chip | tip for ultrasonic emulsification suction techniques of FIG. The front view which showed the modification of 2nd Embodiment of the chip | tip for ultrasonic emulsion suction techniques. Explanatory drawing of expansion operation | movement of the chip | tip for ultrasonic emulsion suction techniques.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tip for ultrasonic emulsification aspiration 3 Handpiece 15 Protrusion 17 Notch groove 23 Vibrator 41, 43 Opposite inclined surface X axis P groove bottom

Claims (3)

A tip for ultrasonic emulsification and aspiration that is vibrated by a vibrator provided at the tip of the handpiece body,
The tip for ultrasonic emulsification and aspiration comprises a plurality of pointed projections at the tip opening tip formed in a cylindrical shape.   2. The plurality of protrusions are formed by a plurality of cut grooves formed along an axial direction from a tip opening edge of an ultrasonic emulsion suction tip formed in a cylindrical shape. The tip for ultrasonic emulsification and suction as described.   The tip for ultrasonic emulsification and aspiration is provided with an opposing inclined surface formed in a V-groove shape with a groove bottom facing on an axis crossing the edge of the opening at the tip opening tip. The tip for ultrasonic emulsification and suction as described.

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