CN217310816U

CN217310816U - Bendable ultrasonic emulsification needle head

Info

Publication number: CN217310816U
Application number: CN202220192095.1U
Authority: CN
Inventors: 袁小鹤; 尹松平; 钱慧霞; 骆威; 颜忠余
Original assignee: Innolcon Medical Technology Suzhou Co Ltd
Current assignee: Innolcon Medical Technology Suzhou Co Ltd
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-08-30
Anticipated expiration: 2032-01-24

Abstract

The utility model discloses a phacoemulsification syringe needle of can buckling, include: a metal connector; the plastic needle tube is arranged in the metal connecting body in a penetrating way; the metal sleeve is provided with a water inlet and a filling opening, and the farthest end of the metal sleeve is provided with a necking structure; the plastic clamping perfusion sleeve is sleeved outside the metal sleeve and forms a liquid storage space, the far end of the perfusion sleeve is a contraction part, and the minimum inner diameter of the contraction part is smaller than the outer diameter of the metal sleeve so as to form a closed point at the far end on the liquid storage space; the water inlet and the filling port are respectively positioned at two sides of the closed point; the plastic needle cannula and the metal sleeve form an axial bend at the closure point. The beneficial effects of the utility model are mainly embodied in that: the bent metal sleeve is combined with the elastic plastic needle tube, so that the flexible ultrasonic emulsification needle head with angles can be realized, and the operability and the operation visual field of instruments of doctors in ultrasonic emulsification operations are improved.

Description

Bendable ultrasonic emulsification needle head

Technical Field

The utility model relates to an ophthalmology cataract ultrasonic emulsification operation field especially relates to a ultrasonic emulsification syringe needle.

Background

Among cataract surgery, Phaco is widely favored by doctors and patients due to its unique advantages. The ultrasonic emulsification operation is a minimally invasive operation, which is to open a small incision of about 2-3 mm on the edge of a cornea, stretch an ultrasonic emulsification needle through the small incision to break turbid crystalline lens and cortex into chyle, suck the chyle out by an aspiration and perfusion system while keeping the anterior chamber full, and then implant an artificial lens to make a patient see light.

The therapeutic equipment used in phacoemulsification surgery generally comprises: an ultrasonic frequency electric generator, an ultrasonic emulsification handle and an ultrasonic emulsification needle. The ultrasonic emulsification handle is provided with an electroacoustic transducer which converts ultrasonic frequency electric signals into ultrasonic frequency mechanical vibration. The working principle of the ultrasonic emulsification instrument for removing the cataract tissues is as follows: the electro-acoustic transducer of the power ultrasonic signal source is used for converting electric energy into mechanical energy with high-speed tiny amplitude, the ultrasonic emulsification handle is used for gathering energy to amplify the amplitude, the mechanical vibration is acted on human tissues through the connected ultrasonic emulsification needle head to assist the functions of crushing, cutting, emulsification, suction, blood coagulation and the like, the crushed and emulsified human tissues are sucked out of a human body, and then the artificial lens is implanted to restore the vision of a patient. Compared with the traditional intracapsular and extracapsular cataract extraction operation, the ultrasonic emulsification treatment has the advantages of small incision, less postoperative complications, quick recovery of vision and the like. The treatment is also suitable for the immature stage of cataract, and makes early treatment possible.

Generally, tools used in the phacoemulsification surgery, such as an incision puncture knife, a tunnel knife, a thin injection needle, a nucleus splitter and the like, have a certain bending angle, so that the bent tools can bring a better visual field for doctors and facilitate the operation of the doctors. The ultrasonic emulsification needle head is made of titanium alloy or other metal materials, large-angle bending is difficult to achieve, and the conventionally designed silica gel perfusion sleeve cannot isolate the damage of ultrasonic vibration of the large-bending ultrasonic emulsification needle head to the incision and other tissues of eyes.

SUMMERY OF THE UTILITY MODEL

The utility model provides a flexible phacoemulsification syringe needle to make difficulty and operation risk problem more than to solve prior art and be difficult to form the problem of the degree of curvature that makes things convenient for doctor's operation needs.

For solving the above technical problem, the technical scheme of the utility model is that:

a bendable phacoemulsification needle, comprising:

the proximal end of the metal connector 1 is fixed with the ultrasonic emulsification handle 9;

a plastic needle tube 2 penetrating the metal connector 1 and having a suction channel 202 penetrating the phacoemulsification handle 9 along an axis;

the metal sleeve 3 is fixed with the metal connector 1 at the near end and coaxially sleeved with the plastic needle tube 2, a filling channel 3201 is formed between the outer wall of the plastic needle tube 2 and the inner wall of the metal sleeve 3, a water inlet 301 and a filling port 302 which are communicated with the filling channel 3201 are arranged on the metal sleeve 3, and the water inlet 301 and the filling port 302 are both arranged on the side wall of the metal sleeve 3;

the plastic needle tube 2 and the metal sleeve 3 are simultaneously bent in the axial direction.

Preferably, the bending points of the plastic needle tube 2 and the metal sleeve 3 are 5-10 mm away from the water inlet 301.

Preferably, the bending angle of the plastic needle tube 2 and the metal sleeve 3 is between 20 and 60 degrees.

Preferably, the farthest end of the metal sleeve 3 is provided with a necking structure 303 which is always matched with the outer wall of the plastic needle tube 2 to close the perfusion channel 3201, and the necking structure 303 and the axis of the metal sleeve 3 form an included angle.

Preferably, the metal connecting body 1 comprises a fastening part 101, a threaded part 104 and a locking part 102 from far to near, the threaded part 104 has an external thread adapted to the phacoemulsification handle 9, and the locking part 102 has at least one axially disposed notch 103.

Preferably, the metal connecting body 1 comprises a first inner hole 105 at the proximal end and a second inner hole 106 at the distal end, wherein the first inner hole 105 is communicated with the cut 103;

the plastic needle tube 2 is arranged in a first inner hole 105 of the metal connector 1 in a penetrating way, and the plastic needle tube 2 is fixed with the metal connector 1 under the action that the shell of the ultrasonic emulsification handle 9 compresses the notch 103 and the first inner hole 105;

the inner diameter of the second inner hole 106 is larger than that of the first inner hole 105, and the proximal end of the metal sleeve 3 is inserted into the second inner hole 106, and the two are tightly matched.

Preferably, the distal end of the plastic needle tube 2 is a wedge-shaped structure 201.

Preferably, the ultrasonic emulsification device further comprises a plastic clamping perfusion sleeve 4 which is sleeved outside the metal sleeve 3 and has an inner diameter larger than that of the metal sleeve 3 to form a liquid storage space 4301, a proximal end of the perfusion sleeve is fixed to the ultrasonic emulsification handle 9, a distal end of the perfusion sleeve is sleeved outside the metal sleeve 3 in a sealing manner to form a sealing point, the water inlet 301 and the perfusion opening 302 are respectively located on two sides of the sealing point, and the water inlet 301 is located in the liquid storage space 4301.

Preferably, the plastic needle cannula 2 and the metal cannula 3 are axially curved at the closing point.

Preferably, the distal end of the plastic clamping perfusion cover 4 is a constriction 401, the constriction 401 is conical, and the smallest inner diameter of the constriction 401 at the most distal end thereof is smaller than the outer diameter of the metal sleeve 3 to form the closed point for the liquid storage space 4301.

The beneficial effects of the utility model are mainly embodied in that: the bent metal sleeve is combined with the elastic plastic needle tube, so that the flexible ultrasonic emulsification needle head with angles can be realized, and the operability and the operation visual field of instruments of doctors in ultrasonic emulsification operations are improved.

Drawings

FIG. 1: the utility model has the advantages that the three-dimensional structure of the connection between the metal connector and the plastic needle tube is shown in the preferred embodiment;

FIG. 2: the utility model discloses the sectional view of the connection between the metal connector and the plastic needle tube in the preferred embodiment;

FIG. 3: the utility model is a sectional view of the connection of the metal connector, the plastic needle tube and the ultrasonic emulsification handle in the preferred embodiment;

FIG. 4: the utility model discloses the preferred embodiment assembles the spatial structure sketch map of the metal sleeve on the basis of fig. 1;

FIG. 5 is a schematic view of: the structure of figure 4 of the preferred embodiment of the present invention is a cross-sectional view;

FIG. 6: the preferred embodiment of the utility model is a three-dimensional structure schematic diagram of a plastic clamping perfusion sleeve assembled on the basis of figure 4;

FIG. 7: the utility model discloses the section view of the structure of figure 6 of the preferred embodiment;

FIG. 8: the utility model discloses preferred embodiment plastic needle tubing and metal sleeve buckle's schematic diagram.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments are not limited to the present invention, and structural, method, or functional changes made by those skilled in the art according to these embodiments are all included in the scope of the present invention.

The utility model discloses a surgical instrument, especially a ultrasonic emulsification syringe needle of can buckling, include: a metal connector 1, a plastic needle tube 2 and a metal sleeve 3. As shown in fig. 1, 2 and 3, the metal connector 1 comprises a fastening portion 101, a threaded portion 104 and a locking portion 102 from the far side to the near side, the threaded portion 104 has an external thread adapted to the phacoemulsification handle 9, and the locking portion 102 has at least one axially disposed notch 103, two symmetrically disposed in the preferred embodiment. The metal connecting body 1 comprises a first bore 105 at the proximal end and a second bore 106 at the distal end, the first bore 105 being in communication with the cut-out 103. The proximal end of the plastic needle tube 2 is inserted into the first inner hole 105 of the metal connector 1.

The main body of the plastic needle tube 2 is in a round tube shape, the plastic needle tube 2 is provided with an aspiration channel 202 which penetrates through the ultrasonic emulsification handle 9 along the axis, and the distal end of the plastic needle tube is provided with a wedge-shaped structure 201. Or, the plastic needle tube 2 is in a round tube shape with uniform diameter, and the far end of the plastic needle tube is in a wedge-shaped structure with a bending section; or, the plastic needle tube 2 is in a stepped round tube shape, and the diameter of the proximal end of the plastic needle tube is larger than that of the distal end of the plastic needle tube; or the far end of the device is in a bell mouth structure.

The fastening portion 101 is a wrench tool action surface having a shape and a size corresponding to a wrench tool, and the wrench tool acts on the fastening portion 101 to fixedly connect the metal connecting body 1 to the distal end of the phacoemulsification handle 9.

The thread part 104 is an external thread arranged on the outer surface of the middle part of the metal connector 1 and is meshed with the internal thread at the far end of the ultrasonic emulsification handle, and the metal connector 1 is screwed into the ultrasonic emulsification handle through the fastening part 101 by a wrench. The locking portion 102, which serves as a guide, fits snugly against the interior cavity surface of the phacoemulsification handle. At this time, the slit 103 is contracted by squeezing in the process of being screwed in, that is, the proximal end side of the locking portion 102 is gathered and abuts against the inner wall of the phacoemulsification handpiece. The diameter of the first bore 105 also changes due to the deformation of the cut-out 103. Thus, the plastic needle cannula 2 is rigidly coupled to the metal connecting body 1 and thus to the distal end of the phacoemulsification handpiece by the cut-out 103 and the first bore 105, and the ultrasonic vibrations are thus transmitted very efficiently to the distal end of the needle cannula.

The ultrasonic emulsification handle 9 converts the electric energy into the mechanical energy of the plastic needle tube 2, thereby realizing the emulsification of the cataract; meanwhile, the suction channel 202 of the plastic needle tube 2 is communicated with a system suction pipeline, and the emulsified cataract is sucked into the suction pipeline along the suction channel 202.

Referring to fig. 4 and 5, the inner diameter of the second inner bore 106 of the metal connecting body 1 is larger than the inner diameter of the first inner bore 105, and the first inner bore 105 is a counterbore with an opening facing to the far end.

The main body of the metal sleeve 3 is cylindrical, the near end of the metal sleeve 3 is inserted into the second inner hole 106 along the axial direction, and the metal sleeve 3 and the second inner hole are tightly matched, so that the metal sleeve 3 is coaxially sleeved on the periphery of the plastic needle tube 2 after installation. The length of the metal sleeve 3 is smaller than or slightly smaller than (equivalent to) the length of the plastic needle tube 2.

As shown in fig. 5, the metal sleeve 3 is provided with a water inlet 301 located at the proximal end and an infusion port 302 located at the distal end, and both the water inlet 301 and the infusion port 302 are opened on the side wall of the metal sleeve 3. As is well known to those skilled in the art, the shapes and the numbers of the water inlets 301 and the filling ports 302 are not limited, and may be circular or elliptical holes, or one, two or more. When belonging to an even number, may be symmetrically distributed.

The metal sleeve 3 and the plastic needle tube 2 are coaxially arranged, the inner diameter of the metal sleeve 3 is larger than the outer diameter of the plastic needle tube 2, a perfusion channel 3201 is formed between the metal sleeve 3 and the plastic needle tube 2 after installation, and perfusion liquid enters from the water inlet 301 and flows out from the perfusion opening 302 after passing through the perfusion channel 3201.

The far end of the metal sleeve 3 is provided with a necking structure 303, so that the inner diameter of the metal sleeve 3 is reduced to be matched with the outer diameter of the plastic needle, and the metal sleeve and the plastic needle are matched to seal the perfusion channel 3201, so that perfusion liquid cannot flow out of the far end of the metal sleeve 3.

In the preferred embodiment shown in fig. 6 and 7, the plastic clamping perfusion cover 4 is sleeved outside the metal sleeve 3. The plastic clamping perfusion sleeve 4 is made of non-metal materials such as silica gel, and the internal thread of the near end of the plastic clamping perfusion sleeve is matched with the external thread of the far end of the ultrasonic emulsification handle 9. The plastic clamping perfusion sleeve 4 is coaxial with the metal perfusion sleeve 3, is sleeved outside the metal sleeve 3, and has an inner diameter larger than that of the metal sleeve 3 to form a liquid storage space 4301. The distal end of the plastic clamping perfusion sleeve 4 is a constriction 401, and the minimum inner diameter of the constriction 401 is smaller than the outer diameter of the metal sleeve 3 to form a closed point at the distal end to the liquid storage space 4301 through interference fit. The constriction 401 is conical, the smallest inner diameter of the constriction 401 being located at its most distal end. The water inlet 301 and the filling port 302 are respectively located on two sides of the closed point, and the water inlet 301 is located in the liquid storage space 4301.

When the perfusion fluid flows into the plastic clamping perfusion sleeve 4 from the ultrasonic emulsification handle 9, the perfusion fluid enters the liquid storage space 4301, and due to the sealing structures at the two ends of the plastic clamping perfusion sleeve 4, the perfusion fluid can only flow in from the water inlet 301 and flow out from the perfusion opening 302 along the perfusion channel 3201.

Because the necking structure 303 and the axis of the metal sleeve 3 form an included angle, that is, the necking hole and the central axis of the sleeve form a certain angle, the angle can be defined at will, and the plastic needle tube 2 is made of elastic plastics such as PEEK. Because the plastic needle tube 2 is arranged inside the metal sleeve 3, the distal end of the plastic needle tube 2 can be bent at a certain angle along with the angle of the shrinkage cavity. The angle and position of the bend can be set as desired, as is well known to those skilled in the art, and in the preferred embodiment shown in fig. 8, the metal sleeve 3 forms an axial bend at the closure point, the bend angle being between 20 ° and 60 °. Or preferably located distal to the water inlet, approximately 5-10 mm from the water inlet. Since the plastic needle body 2 is made of plastic material such as PEEK, it can be coaxially bent in the metal sleeve 3 along the bending direction of the metal sleeve.

The utility model discloses in to one side that is close to operating personnel is the near-end, and one side that is kept away from operating personnel is the distal end.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and such modifications and adaptations are intended to be included within the scope of the invention.

Claims

1. A bendable ultrasonic emulsification needle head is characterized by comprising

The proximal end of the metal connector (1) is fixed with the ultrasonic emulsification handle (9);

the plastic needle tube (2) penetrates through the metal connecting body (1) and is provided with a suction channel (202) which penetrates through the ultrasonic emulsification handle (9) along the axis;

the near end of the metal sleeve (3) is fixed with the metal connecting body (1) and coaxially sleeved with the plastic needle tube (2), a filling channel (3201) is formed between the outer wall of the plastic needle tube (2) and the inner wall of the metal sleeve (3), a water inlet (301) and a filling port (302) which are communicated with the filling channel (3201) are formed in the metal sleeve (3), and the water inlet (301) and the filling port (302) are both formed in the side wall of the metal sleeve (3);

the plastic needle tube (2) and the metal sleeve (3) are bent in the axial direction at the same time.

2. A bendable phacoemulsification needle according to claim 1, characterized in that the bending point of the plastic needle tube (2) and the metal sleeve (3) is 5-10 mm from the water inlet (301).

3. A bendable phacoemulsification needle according to claim 1, wherein the bending angle of the plastic needle tube (2) and the metal sleeve (3) is between 20 ° and 60 °.

4. The bendable phacoemulsification needle according to claim 1, wherein the metal sleeve (3) has a necking structure (303) at the most distal end to be always matched with the outer wall of the plastic needle tube (2) to close the perfusion channel (3201), and the necking structure (303) is arranged at an included angle with the axis of the metal sleeve (3).

5. A bendable phacoemulsification needle according to any of claims 1 to 4, characterized in that the metal connecting body (1) comprises from the distal to the proximal end a fastening part (101), a threaded part (104) and a locking part (102), the threaded part (104) having an external thread adapted to the phacoemulsification handle (9), the locking part (102) having at least one axially arranged cut-out (103).

6. A bendable phacoemulsification needle according to claim 5, wherein the metal connecting body (1) comprises a first bore (105) at the proximal end and a second bore (106) at the distal end, the first bore (105) being through the slit (103);

the plastic needle tube (2) is arranged in a first inner hole (105) of the metal connecting body (1) in a penetrating mode, and the plastic needle tube (2) is fixed with the metal connecting body (1) under the effect that the shell of the ultrasonic emulsification handle (9) compresses the notch (103) and the first inner hole (105);

the inner diameter of the second inner hole (106) is larger than that of the first inner hole (105), and the proximal end of the metal sleeve (3) is inserted into the second inner hole (106) and is in tight fit with the second inner hole.

7. A bendable phacoemulsification needle according to claim 6, characterized in that the distal end of the plastic needle tube (2) is wedge shaped (201).

8. The bendable phacoemulsification needle according to any one of claims 1 to 4, further comprising a plastic clamping perfusion sleeve (4) which is sleeved outside the metal sleeve (3) and has an inner diameter larger than the metal sleeve (3) to form a liquid storage space (4301), wherein a proximal end of the plastic clamping perfusion sleeve is fixed to the phacoemulsification handle (9), a distal end of the plastic clamping perfusion sleeve is sleeved outside the metal sleeve (3) in a sealing manner to form a sealing point, the water inlet (301) and the perfusion opening (302) are respectively located on two sides of the sealing point, and the water inlet (301) is located in the liquid storage space (4301).

9. A bendable phacoemulsification needle according to claim 8, characterized in that the plastic needle tube (2) and the metal sleeve (3) form an axial bend at the closing point.

10. A bendable phacoemulsification needle according to claim 8, wherein the distal end of the plastic clip infusion sleeve (4) is a constriction (401), the constriction (401) is conical, the smallest inner diameter of the constriction (401) at its distal end is smaller than the outer diameter of the metal sleeve (3) forming the closing point for the reservoir (4301).