JP5679085B2 - Lens for ultrasonic emulsion suction - Google Patents

Description

  The present invention relates to a chip that can be used for phacoemulsification, which is a kind of ophthalmic surgery.

  In cataract surgery, a surgical operation called phacoemulsification is generally performed in order to remove a cloudy lens of a patient. This surgical method inserts a dedicated chip into the lens and ultrasonically vibrates the chip while supplying the perfusate to crush and emulsify the lens. Through the body.

  For example, a structure disclosed in Patent Documents 1 and 2 has been proposed as a known phacoemulsification tip (hereinafter also simply referred to as “chip”).

  However, further improvement in chip performance (enhancement of crushing force and improvement of crushing efficiency) is desired, and there is room for improvement.

JP 2006-000644 A JP 2006-247392 A

  The present invention has been proposed in view of the above circumstances, and an object of the present invention is to provide a phacoemulsification tip having excellent ability to efficiently and smoothly crush and suck a crystalline lens.

  As a result of repeatedly examining prototype tests while recognizing that the shape and structure of the end portion are extremely important for efficiently and smoothly crushing and sucking the crystalline lens, the present inventors are suitable for realizing the above-described object. The chip was found and the present invention was completed.

That is, the present invention employs, for example, the following configurations / features.
(Aspect 1)
A shaft having first and second ends;
A distal end disposed at the first end of the shaft and having an opening;
A suction passage extending from the opening of the distal end to the second end of the shaft;
And having
The suction tip for phacoemulsification characterized in that the suction passage is formed in a spiral shape at the end portion from the opening toward the shaft.
(Aspect 2)
A shaft having first and second ends;
A distal end disposed at the first end of the shaft and having an opening;
A suction passage extending from the opening of the distal end to the second end of the shaft;
And having
The suction passage has a first section provided on the opening side and a second section provided on the first end side of the shaft at the end portion;
The suction passage is narrowed stepwise toward the shaft in the first section,
The tip for ultrasonic emulsification and suction of a lens, wherein the suction passage is tapered toward the shaft in the second section.
(Aspect 3)
A shaft having first and second ends;
A distal end disposed at the first end of the shaft and having an opening;
A suction passage extending from the opening of the distal end to the second end of the shaft;
And having
The suction passage has a first section provided on the opening side and a second section provided on the first end side of the shaft at the end portion;
The suction passage is tapered in a spiral toward the shaft in the first section;
The suction tip for phacoemulsification, wherein the suction passage is tapered in a stepped manner toward the shaft in the second section.
(Aspect 4)
One or more guide grooves from the opening to the shaft are further formed in the inner wall of the suction passage, and the ultrasonic ultrasonic emulsification suction according to any one of aspects 1 to 3 Surgical tip.

  According to the chip of the present invention, the suction passage has a structure that is thinned in a stepped shape and / or a spiral shape from the opening at the end portion toward the shaft. By colliding with the structure, it is further finely crushed, and the chip crushing efficiency is remarkably improved.

  Further, according to the chip of the present invention, since the guide groove directed from the opening to the shaft is further arranged on the inner wall of the suction passage that constitutes the structure, the fluid containing the crushed crystalline substance colliding with the structure Flows smoothly downstream without staying in the vicinity of the structure.

1 is a perspective view and a cross-sectional view showing a chip of Example 1. FIG. It is the expanded sectional view and side view which showed the terminal part of Example 1. FIG. FIG. 4 is an enlarged cross-sectional view and a side view showing the end portion of Example 2, and an enlarged cross-sectional view and a side view showing the end portion of Example 3.

  Hereinafter, although the present invention is explained based on the example shown in a drawing, the present invention is not limited to the following concrete example at all. In the drawings, the same reference numerals are used for the same or corresponding elements.

(Chip with stepped step structure and guide groove in the suction passage on the end side)
The chip 1 according to the first embodiment will be described with reference to FIGS. 1 and 2. FIGS. 1A and 1B are a perspective view and a cross-sectional view showing the chip 1 of the first embodiment. FIG. 1C shows a modification of the first embodiment described later. 2A and 2B are an enlarged cross-sectional view and a side view showing the end portion 3 of the first embodiment.

  The tip 1 of the first embodiment is arranged at the shaft 2 having the first and second ends 21 and 22 and the first end 21 of the shaft 2 and has the opening 4 in the same manner as the known tip configuration. And a suction passage 5 extending from the opening 4 of the end portion 3 to the second end 22 of the shaft 2. Note that the opening 4 of the end portion 3 may be cut obliquely so as to have an inclination angle θ as shown in FIG. A preferred inclination angle θ is 0 ° ≦ θ ≦ 45 °. The larger the angle θ, the easier it is to destroy the crystalline lens. On the other hand, there is an advantage that the smaller the angle θ is, the more difficult it is to destroy the crystalline lens, but it becomes easier to catch the crystalline lens.

(Chip material)
The material of the chip 1 is preferably a titanium alloy such as Ti-6Al-4V in terms of ductility, toughness, mechanical strength, workability, and weldability, but is not necessarily limited thereto. Other metals and resins may be used.

(Attaching the chip to another device)
The chip 1 is one of the components of the lens emulsifying device together with the handpiece (not shown), the screw portion 6 that can be attached to and detached from the ultrasonic device (not shown) in the handpiece, A hub 7 that connects the threaded portion 6 and the shaft 2 is further provided (see each figure in FIG. 1). An opening 8 is provided on the end surface of the screw portion 6, and a communication passage 9 that connects the opening 8 and the suction passage 5 is provided in the screw portion 6 and the hub 7. The perfusate (hereinafter also referred to simply as “fluid”) containing the pulverized lens sucked from 4 to the suction passage 5 is discharged out of the lens emulsifying device through the handpiece.

(Suction structure of suction passage)
Here, in Example 1, it should be noted that the suction passage 5 is tapered in a stepped manner from the opening 4 toward the shaft 2 as indicated by reference numeral 51 in FIG. In the illustrated example, the suction passage 5 is formed with four hollow cylindrical flow paths having different inner diameters (in order of decreasing diameter), and a four-step staircase structure 51 is formed in a sectional view.

  Thereby, the pulverized lens (not shown) sucked from the opening 4 is further crushed by colliding with the stepped structure 51 (the step formed by the stepped structure 51), and the crushing efficiency of the chip 1 is remarkably improved. It is.

  It should also be noted that one or more guide grooves 52 (four in the illustrated example) are further formed in the inner wall of the suction passage 5 from the opening 4 toward the shaft 2. As a result, the fluid containing the crushed crystalline lens colliding with the stepped structure 51 flows out to the downstream side (the suction passage 5 and the communication passage 9) very smoothly without staying in the vicinity of the structure 51.

  Note that a plurality of guide grooves 52 are preferably formed so as to evenly divide the outer periphery of the inner wall. In the example shown in the drawing, each groove is arranged every 90 ° so that the outer periphery (circumference) is divided into four.

(Modification of the end part)
In the above-described first embodiment, it is assumed that the end portion 3 is arranged so as to be aligned on the same axis as the axis of the shaft 2, but this is not necessarily limited thereto. For example, as shown in FIG.1 (c), you may employ | adopt the structure (not shown) inclined so that the terminal part 3 warped with respect to the shaft 2, and the effect of this invention mentioned above is the same. Is obtained.

(Chip with a spiral structure in the suction passage on the end side)
With reference to FIGS. 3A and 3B, the chip 1 of Example 2 will be described. As will be described later, the chip 1 of the second embodiment has a suction passage 5 having a structure different from that of the first embodiment. However, the other components are substantially the same as the components and components described in the first embodiment. The description thereof is omitted here.

  Here, in Example 2, as shown by reference numeral 53 in FIGS. 3A and 3B, it is noted that the suction passage 5 is spirally narrowed from the opening 4 toward the shaft 2. I want to be. In the illustrated example, the suction passage 5 is formed with a conical channel whose inner diameter is gradually reduced in the section of the end portion 3, and a spiral groove is provided on the inner wall surface of the conical channel to form a spiral shape. A structure 53 is formed.

  Thereby, the pulverized crystalline lens (not shown) sucked from the opening 4 is further finely crushed by colliding with the spiral structure 53, and the crushing efficiency of the chip 1 is remarkably improved. Further, since the fluid containing the pulverized crystalline lens is guided downstream along the spiral groove 55 forming the spiral structure 53, the fluid colliding with the spiral structure 53 stays in the vicinity of the structure 53. However, it flows out to the downstream side (suction passage 5, communication passage 9) very smoothly.

(Chip with spiral structure and guide groove in the suction passage on the end side)
The chip 1 of the third embodiment has a spiral structure 53 that is substantially the same as the chip 1 of the second embodiment, but has the guide groove 52 described in the first embodiment (see FIGS. 3C and 3D). reference). Thereby, the suction of the fluid to the suction passage 5 and the discharge of the fluid from the suction passage 5 are further promoted, and the crushing efficiency as the chip 1 is improved.

(Chip with spiral structure and guide groove in the suction passage on the end side)
As Example 4, although not shown, the chip 1 having the suction passage 5 in which the step-like structure 51 as exemplified in Example 1 and the spiral structure 53 as exemplified in Examples 2 and 3 are combined. Can be mentioned.

  Specifically, the suction passage 5 is provided at the end portion 3 on the first section (that is, the suction side section, not shown) provided on the opening 4 side and on the first end 21 side of the shaft 2. The second section (that is, the discharge side section, not shown) is provided. And in this 1st area, the flow-path shape of the suction channel | path 5 is made thin at step shape toward the shaft 2. As shown in FIG. On the other hand, in the second section, the flow path shape of the suction passage 5 is narrowed in a spiral toward the shaft 2.

  With this configuration, the pulverized lens (not shown) sucked from the opening 4 is further finely crushed by colliding with the wall surfaces of the stepped structure 51 and the spiral structure 53 one after another. This greatly improves the crushing efficiency. Further, the fluid containing the crushed material is guided by the spiral groove so as to smoothly flow to the downstream side of the suction passage 5.

  Further, the fifth embodiment is a modification of the fourth embodiment, and although not illustrated, the flow path shape of the first section described in the fourth embodiment is spirally thinned, while the second section is formed in the second section. The flow path shape of the suction passage 5 is made to be stepped toward the shaft 2. That is, the fifth embodiment is configured such that the installation order of the stepped flow path and the spiral flow path in the fourth embodiment is different (reverse).

  The chip 1 according to the fourth or fifth embodiment may be provided with the guide groove 52 as described in the first and third embodiments. This is because the suction of the fluid into the suction passage 5 and the discharge of the fluid from the suction passage 5 are further promoted, and the crushing efficiency as the chip 1 is further improved.

  Further, the number of guide grooves 52 is not limited to the number of installations in each embodiment, and at least one guide groove 52 may be provided. The illustrated guide groove 52 is a horizontal groove that runs parallel to the axis of the suction passage 5, but is not necessarily limited thereto, and may be, for example, a groove inclined to the axis.

  As described above, the phacoemulsification tip 1 according to the present invention is superior in the ability to efficiently and smoothly crush and suck the crystalline lens as compared with the conventional product, and has industrial utility value and industry. The above availability is very high.

DESCRIPTION OF SYMBOLS 1 Tip for phacoemulsification aspiration 2 Shaft 3 Terminal part 4 Terminal part opening part 5 Suction passage 6 Screw part 7 Hub part 8 Screw part opening part 9 Connection path 21 First end of shaft 22 Second shaft End 51 Step-like structure 52 Guide groove 53 Helical structure

Claims (4)

A shaft having first and second ends;
A distal end disposed at the first end of the shaft and having an opening;
A suction passage extending from the opening of the distal end to the second end of the shaft;
And having
The suction tip for phacoemulsification characterized in that the suction passage is formed in a spiral shape at the end portion from the opening toward the shaft. A shaft having first and second ends;
A distal end disposed at the first end of the shaft and having an opening;
A suction passage extending from the opening of the distal end to the second end of the shaft;
And having
The suction passage has a first section provided on the opening side and a second section provided on the first end side of the shaft at the end portion;
The suction passage is narrowed stepwise toward the shaft in the first section,
The tip for ultrasonic emulsification and suction of a lens, wherein the suction passage is tapered toward the shaft in the second section. A shaft having first and second ends;
A distal end disposed at the first end of the shaft and having an opening;
A suction passage extending from the opening of the distal end to the second end of the shaft;
And having
The suction passage has a first section provided on the opening side and a second section provided on the first end side of the shaft at the end portion;
The suction passage is tapered in a spiral toward the shaft in the first section;
The suction tip for phacoemulsification, wherein the suction passage is tapered in a stepped manner toward the shaft in the second section. The lens ultrasonic wave emulsification according to any one of claims 1 to 3 , wherein one or more guide grooves from the opening to the shaft are further formed on the inner wall of the suction passage. Aspiration tip.

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