JP2018064706A - Chip for ultrasonic surgery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chip for ultrasonic surgery that improves eye tissue fragmentation efficiency.SOLUTION: A chip for ultrasonic surgery for fragmenting an eye tissue includes a shaft part formed cylindrically with a rotation axis as a central axis, a fragmentation part connected to one end of the shaft part, which is formed cylindrically with an inclined axis, which is inclined with respect to the rotation axis, as a central axis, and recesses formed toward a connection part side of the fragmentation part and the shaft part at the tip of the fragmentation part. The recesses are formed at a position on both sides or on one side in a direction intersecting with a direction that the tip of the fragmentation part vibrates.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to an ultrasonic surgical tip used when crushing and emulsifying a lens nucleus that has become clouded due to cataracts or the like.

  Patent Document 1 discloses a cutting tip that can be vibrated in a longitudinal direction and / or a lateral direction (twist direction) by being attached to a handpiece.

Japanese Patent No. 5624134

  In a chip that performs torsional vibration as exemplified in the cutting chip of Patent Document 1, it is desirable that the crushing efficiency of the lens nucleus is high in order to reduce the influence of the ultrasonic vibration on the eye.

  Accordingly, the present disclosure has been made to solve the above-described problems, and an object thereof is to provide an ultrasonic surgical tip that improves the efficiency of crushing eye tissue.

  An ultrasonic surgical tip provided by a typical embodiment of the present disclosure is an ultrasonic surgical tip for crushing ocular tissue, a shaft portion formed in a cylindrical shape with a rotation axis as a central axis, A crushing portion that is connected to one end and is formed in a cylindrical shape with an inclined axis that is inclined with respect to the rotation axis as a central axis; And the concave portion is formed at a position on both sides or one side of the direction intersecting with the direction in which the tip of the crushing portion vibrates.

  An ultrasonic surgical tip provided by a typical embodiment of the present disclosure is an ultrasonic surgical tip for crushing eye tissue, and is connected to a shaft portion formed in a cylindrical shape and one end of the shaft portion, A crushing part formed in a cylindrical shape coaxial with the shaft part, and a recess formed toward the shaft part side at the tip part of the crushing part, and the tip part of the crushing part is the crushing part The recesses are formed at positions on both sides or one side in a direction intersecting the direction in which the tip of the crushing part vibrates.

  According to the ultrasonic surgical tip of the present disclosure, the efficiency of crushing ocular tissue is improved.

It is a side view (partial sectional view) of the US handpiece of the present embodiment. It is a side view of the chip of a 1st embodiment. It is the figure which looked at the chip | tip of 1st Embodiment from the front end side. FIG. 3 is a view as seen from an arrow A in FIG. 2. FIG. 3 is a view taken in the direction of arrow B in FIG. 2. It is a figure which shows when the lens nucleus is crushed and emulsified by the chip of the first embodiment. It is CC sectional drawing of FIG. It is a side view of the chip | tip of a modification. It is a side view of the chip of a 2nd embodiment. It is a figure which shows when the lens nucleus is crushed and emulsified with a conventional chip. It is DD sectional drawing of FIG.

[First Embodiment]
Exemplary embodiments of the present disclosure will be described with reference to the drawings. First, the first embodiment will be described. The US handpiece 1 of the present embodiment is a surgical instrument that crushes and emulsifies a lens nucleus that becomes cloudy due to cataracts by ultrasonic vibration, and sucks and removes the crushed and emulsified lens nucleus. As shown in FIG. 1, the US handpiece 1 includes a US handpiece main body 11, a sleeve 12, and the like.

  The US handpiece main body 11 includes a horn 21, a tip 22 (a tip for ultrasonic surgery), a suction passage 23, and the like. The horn 21 amplifies ultrasonic vibration generated by a vibrator (not shown).

  The tip 22 is formed in a cylindrical shape (for example, a cylindrical shape) and is fixed to the tip of the horn 21. The chip 22 crushes and emulsifies the lens nucleus (an example of “eye tissue”), and is made of, for example, a titanium alloy. The chip 22 includes a suction hole 31 and a suction passage 32. The suction hole 31 is formed at the tip of the tip 22 (the end on the side that sucks the eye tissue) and communicates with the suction passage 32. The suction hole 31 is a hole for sucking the pulverized and emulsified lens nucleus and perfusate (for example, physiological saline) supplied into the eye from an outflow hole (not shown) provided in the sleeve 12. The suction passage 32 communicates with the suction passage 23 (see FIG. 1). The chip 22 will be further described later.

  The suction passage 23 is formed in the horn 21 and the vibrator. The suction passage 23 has one end communicating with the suction passage 32 of the chip 22 and the other end communicating with a suction device (not shown).

  The sleeve 12 is formed in a cylindrical shape (for example, a cylindrical shape) and is fixed to the US handpiece main body 11. The sleeve 12 is made of a soft material such as silicon resin. The sleeve 12 covers the chip 22 with the tip of the chip 22 protruding.

  In the US handpiece 1 having the above-described configuration, ultrasonic vibration is generated when the vibrator is driven, the chip 22 inserted into the eye vibrates, and an impact is applied to the lens nucleus at the tip of the chip 22 to cause the crystalline lens. The core is crushed and emulsified. Then, the pulverized and emulsified lens core is sucked from the suction hole 31 at the tip of the tip 22 together with the perfusate supplied into the eye from the outflow hole provided in the sleeve 12 and discharged out of the body. Suction is performed through the suction passage 32 and the suction passage 23. In this way, the US handpiece 1 pulverizes and emulsifies the lens nucleus by ultrasonic vibration, and sucks and removes the pulverized and emulsified lens nucleus.

  Next, the chip 22 will be further described. As shown in FIG. 2, the chip 22 of this embodiment includes a shaft portion 41 and a crushing portion 42.

  The shaft portion 41 is a hollow thin tube formed in a cylindrical shape with the rotation axis R as a central axis. A crushing portion 42 is connected to one end of the shaft portion 41. On the other hand, a horn 21 (see FIG. 1) is connected to the other end of the shaft portion 41. As shown by an arrow α in FIG. 3, the shaft portion 41 is rotated by a vibrator so as to reciprocate within a range of a predetermined angle (small angle) around the rotation axis R. Note that the shaft portion 41 may be vibrated so as to travel straight along the rotation axis R direction by a vibrator.

  The crushing part 42 is a hollow thin tube formed in a cylindrical shape with an inclination axis I inclined with respect to the rotation axis R as a central axis. When defining XYZ axes orthogonal to each other as shown in FIG. 2, when the rotation axis R is formed along the X-axis direction, the inclined axis I is relative to the rotation axis R in the XZ-axis plane. And is formed so as to incline toward the Z-axis direction. In addition, a tip portion 42 a that contacts the crystalline lens nucleus 100 is formed at one end of the crushing portion 42. On the other hand, the shaft portion 41 is connected to the other end of the crushing portion 42.

  In the chip 22 having the shaft portion 41 and the crushing portion 42 as described above, the shaft portion 41 reciprocates within a range of a predetermined angle around the rotation axis R as shown by an arrow α in FIG. Rotate as you do. As a result, the tip end portion 42a of the crushing portion 42 vibrates within a predetermined range (for example, 0.1 mm) in the radial direction of the tip end portion 42a (Y-axis direction shown in FIGS. 2 and 3). In addition, strictly speaking, the tip portion 42a is considered to move while reciprocating in the circumferential direction around the rotation axis R. However, since the range in which the tip portion 42a moves is very small, it can be said that the tip portion 42a vibrates substantially only in the radial direction of the tip portion 42a. In this way, the tip 22 of this embodiment can perform torsional vibration.

  Here, as shown in FIGS. 2 and 3, the chip 22 of the present embodiment has a U-shaped processing portion 51 (concave portion) and a U-shaped processing portion 52 (concave portion) at the tip end portion 42a. The U-shaped processing portion 51 and the U-shaped processing portion 52 are respectively formed at positions on both sides in a direction (Z-axis direction) orthogonal to the direction (Y-axis direction) in which the tip end portion 42a vibrates. That is, as shown in FIG. 3, when the tip end portion 42 a is viewed from the tip end side of the chip 22, the U-shaped processing portion 51 and the U-shaped processing portion 52 are formed on both sides in the vertical direction of FIG. 3.

  The U-shaped processing portion 51 is U-shaped so as to be recessed toward the connecting portion 43 side between the shaft portion 41 and the crushing portion 42 as shown in FIG. 4 when the tip end portion 42a is viewed from the arrow A direction in FIG. It is formed in a letter shape. Moreover, when the front-end | tip part 42a is seen from the arrow B direction in FIG. 2, the U-shaped process part 52 seems to dent toward the connection part 43 side of the axial part 41 and the crushing part 42, as shown in FIG. It is formed in a U shape. 4 and 5, the dotted line written on the tip side of the tip 22 indicates the shape of the tip portion 142a of the crushing portion 142 in the conventional tip 122 (see FIG. 10) described later.

  As shown in FIG. 2, the U-shaped portion 51 and the U-shaped portion 52 are formed with the convex portion 53 as a boundary. The U-shaped processing portion 51 and the U-shaped processing portion 52 each have a shaft portion as the tip 22 moves away from the convex portion 53 when viewed from the side surface direction (direction in which the tip end portion 42a vibrates, Y-axis direction). 41 and the crushing part 42 are formed in a curved shape (curved shape) so as to be directed to the connecting part 43 side. Therefore, when the chip 22 is viewed from the side surface direction, the distal end portion 42 a is formed in a convex curved shape toward the distal end side of the chip 22.

  In this way, in this embodiment, as shown in FIG. 2, the U-shaped processed portion 51 is formed with the protruding portion 53 formed so as to protrude toward the distal end side of the tip 22 at the distal end portion 42 a. And a U-shaped portion 52 is formed. That is, as shown in FIG. 2, the convex portion 53 corresponds to the apex portion of the distal end portion 42 a that is formed in a convex curved shape toward the distal end side of the chip 22. As shown in FIG. 3, when the chip 22 is viewed from the tip side, a pair of (two) convex portions 53 are formed at positions on both sides in the direction in which the tip portion 42a vibrates (Y-axis direction). Yes.

  Here, the conventional tip 122 as shown in FIG. 10 does not have the U-shaped portion 51 and the U-shaped portion 52 at the tip portion 142a of the crushing portion 142, and the tip 122 is placed in the side surface direction (tip portion 142a). The tip portion 142a is formed in a straight line shape when viewed from the direction in which the lens vibrates (Y-axis direction). Then, with respect to such a conventional chip 122, when the tip 142a is vibrated in a state where the tip 142a is in contact with the lens nucleus 100, the tip 142a faces the lens nucleus 100 as shown in FIG. Vibrates while touching. Therefore, the force for crushing the lens nucleus 100 is dispersed at the contact surface between the tip portion 142 a and the lens nucleus 100, so that the tip portion 142 a slides with respect to the lens nucleus 100. Therefore, it becomes difficult for the lens core 100 to be crushed and emulsified. FIG. 11 is a cross-sectional view taken along the line DD of FIG. 10, but is simplified and schematically shown for convenience of explanation.

  On the other hand, in the present embodiment, when the tip 42a is vibrated in a state where the tip 42a is in contact with the crystalline lens nucleus 100 as shown in FIG. 6, the tip 42a is formed at the tip 42a as shown in FIG. The protruding portion 53 vibrates while being in line contact (or point contact) with the crystalline lens core 100. In this way, the tip portion 42a and the lens nucleus are brought into contact with the lens nucleus 100 while the pair of convex portions 53 formed on both sides of the tip portion 42a in the direction in which the tip portion 42a vibrates (Y-axis direction) is brought into contact. The contact area with 100 can be reduced.

  Therefore, the force for crushing the lens nucleus 100 can be concentrated on the contact portion between the convex portion 53 and the lens nucleus 100. In addition, since the pair of convex portions 53 formed at positions on both sides of the distal end portion 42a in the direction in which the distal end portion 42a vibrates is brought into contact with the crystalline lens nucleus 100, the crystalline lens nucleus 100 is easily crushed by the vibration of the convex portion 53. Therefore, since the lens core 100 is easily crushed and emulsified by the convex portion 53, the emulsification efficiency of the lens core 100 is improved. 7 is a cross-sectional view taken along the line C-C in FIG. 6, but is simplified and schematically shown for convenience of explanation.

  As a modification, the chip 22 may have a shape as shown in FIG. The chip 22 shown in FIG. 8 has a U-shaped processing portion 51 formed only at one position in the Z-axis direction at the tip end portion 42a. That is, the U-shaped portion 51 is formed at the distal end portion 42a, but the U-shaped portion 52 is not formed. Thus, in the modification, the U-shaped processing portion 51 is formed at one position in a direction orthogonal to the direction in which the tip end portion 42a vibrates. As another modification, the U-shaped portion 51 is not formed in the tip end portion 42a, but the U-shaped portion 52 may be formed.

  As another modification, the U-shaped portion 51 and the U-shaped portion 52 are not in a direction (Z-axis direction) orthogonal to the direction in which the tip end portion 42a vibrates (Y-axis direction). , May be formed in a crossing direction.

  As described above, the tip 22 of the present embodiment includes the shaft portion 41 formed in a cylindrical shape with the rotation axis R as the central axis, and the inclined shaft that is connected to one end of the shaft portion 41 and is inclined with respect to the rotation axis R. A crushing portion 42 formed in a cylindrical shape with I as a central axis, and a U-shaped processing portion 51 formed toward the connecting portion 43 side of the crushing portion 42 and the shaft portion 41 at the tip 42a of the crushing portion 42. And the U-shaped processing portion 52, and the U-shaped processing portion 51 and the U-shaped processing portion 52 are formed at positions on both sides in the direction intersecting the direction in which the tip end portion 42a vibrates.

  As a result, when the lens nucleus 100 is crushed and emulsified by the chip 22, the tip portion 42a and the lens nucleus are brought into contact with the lens nucleus 100 while the portion formed at the position of the tip portion 42a in the direction in which the tip portion 42a vibrates. The contact area with 100 can be reduced. Therefore, the lens nucleus 100 can be crushed by the tip 42a by concentrating the force for crushing the lens nuclei 100 on the contact portion between the tip 42a and the lens nucleus 100. Therefore, since the lens nucleus 100 is easily crushed and emulsified, the emulsification efficiency of the lens nucleus 100 is improved.

  Moreover, the front-end | tip part 42a is provided with the convex part 53 formed toward the front end side in the position of the both sides of the direction where the said front-end | tip part 42a vibrates.

  Thereby, when the front-end | tip part 42a is made to contact the crystalline lens nucleus 100, the convex part 53 can be made to contact the crystalline lens nucleus 100. FIG. Therefore, when the lens core 100 is crushed and emulsified by the chip 22, if the convex portion 53 is brought into contact with the crystalline lens nucleus 100 and the tip portion 42 a is vibrated, the convex portion 53 makes a line contact (or point contact) with the crystalline lens nucleus 100. Vibrates while. Accordingly, since the force for crushing the lens nucleus 100 is concentrated at the contact portion between the convex portion 53 and the lens nucleus 100, the lens nucleus 100 is easily crushed and emulsified. Therefore, the emulsification efficiency of the lens nucleus 100 is improved.

[Second Embodiment]
Next, the second embodiment will be described. The same components as those in the first embodiment are denoted by the same reference numerals, description thereof will be omitted, and different points will be mainly described. In the present embodiment, as shown in FIG. 9, the crushing portion 42 is formed coaxially with the shaft portion 41. In this embodiment, for example, when the tip 22 reciprocates and moves in the Y-axis direction, the distal end portion 42a vibrates in the radial direction (Y-axis direction) of the crushing portion 42. And the chip | tip 22 of this embodiment has the U-shaped process part 51 and the U-shaped process part 52 in the front-end | tip part 42a. As a modification, the chip 22 may be formed with only one of the U-shaped processing portion 51 and the U-shaped processing portion 52. That is, as a modification, the chip 22 may be formed with the U-shaped processing portion 51 or the U-shaped processing portion 52 at a position on one side in a direction intersecting with the direction in which the tip end portion 42a vibrates.

  As described above, the chip 22 of the present embodiment includes the shaft portion 41 formed in a cylindrical shape, the crushing portion 42 connected to one end of the shaft portion 41 and formed in a cylindrical shape coaxial with the shaft portion 41, The crushing portion 42 has a U-shaped processing portion 51 and a U-shaped processing portion 52 that are formed toward the shaft portion 41 side at the front end portion 42a, and the front end portion 42a vibrates in the radial direction of the crushing portion 42, The U-shaped processing portion 51 and the U-shaped processing portion 52 are formed at positions on both sides or one side in the direction intersecting with the direction in which the tip end portion 42a vibrates.

  As a result, when the lens nucleus 100 is crushed and emulsified by the chip 22, the tip portion 42a and the lens nucleus are brought into contact with the lens nucleus 100 while the portion formed at the position of the tip portion 42a in the direction in which the tip portion 42a vibrates. The contact area with 100 can be reduced. Therefore, the lens nucleus 100 can be crushed by the tip 42a by concentrating the force for crushing the lens nuclei 100 on the contact portion between the tip 42a and the lens nucleus 100. Therefore, the lens core 100 is easily crushed and emulsified. Therefore, the emulsification efficiency of the lens core 100 is also improved for the chip 22 in which the shaft portion 41 and the crushing portion 42 are formed coaxially.

  It should be noted that the above-described embodiment is merely an example, and does not limit the present disclosure in any way, and various improvements and modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 US handpiece 11 US handpiece main body 22 Tip 41 Shaft part 42 Crushing part 42a Tip part 43 Connection part 51 U-shaped process part 52 U-shaped process part 53 Convex part 100 Lens nucleus R Rotating axis I Inclined axis

Claims (4)

In the ultrasonic surgical tip that crushes the eye tissue,
A shaft portion formed in a cylindrical shape with the rotation axis as a central axis;
A crushing portion that is connected to one end of the shaft portion and is formed in a cylindrical shape with an inclined axis that is inclined with respect to the rotation axis as a central axis;
A recess formed at the tip of the crushing part toward the connecting part between the crushing part and the shaft part,
The recesses are formed at positions on both sides or one side of the direction intersecting the direction in which the tip of the crushing part vibrates,
Ultrasonic surgical tip characterized by. The ultrasonic surgical tip of claim 1,
The recesses are formed at positions on both sides of the direction intersecting the direction in which the tip of the crushing part vibrates,
The tip of the crushing part has a convex part formed toward the tip at the positions on both sides in the direction in which the tip vibrates,
Ultrasonic surgical tip characterized by. The ultrasonic surgical tip according to claim 1 or 2,
The recess is formed in a U-shape;
Ultrasonic surgical tip characterized by. In the ultrasonic surgical tip that crushes the eye tissue,
A shaft portion formed in a cylindrical shape;
A crushing portion connected to one end of the shaft portion and formed in a cylindrical shape coaxial with the shaft portion;
A recess formed toward the shaft side at the tip of the crushing part,
The tip of the crushing part vibrates in the radial direction of the crushing part,
The recesses are formed at positions on both sides or one side of the direction intersecting the direction in which the tip of the crushing part vibrates,
Ultrasonic surgical tip characterized by.

Images