CN114557813A

CN114557813A - Ultrasonic emulsification perfusion assembly

Info

Publication number: CN114557813A
Application number: CN202210081336.XA
Authority: CN
Inventors: 袁小鹤; 骆威; 尹松平; 李想; 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: 2022-05-31
Also published as: WO2023138112A1

Abstract

The invention discloses an ultrasonic emulsification perfusion assembly, comprising: a metal connecting body; a plastic needle tube, which is passed through the metal connecting body; a metal perfusion sleeve, which is provided with a water inlet and a perfusion port; It is arranged on the outside of the metal perfusion sleeve to form a liquid storage space, and the water inlet is located in the liquid storage space; the beneficial effects of the present invention are mainly reflected in: the slender needle of the plastic needle tube can improve the stability of the anterior chamber, Reduce the probability of surge; the relatively soft plastic needle tip also reduces the probability of puncturing the crystal capsule; the metal perfusion sleeve effectively isolates the extrusion of the phacoemulsification needle tube body and the incision, greatly reducing or even eliminating ultrasonic friction. The incision burns caused by the incision; the hard metal perfusion sleeve can effectively prevent the reduction or blockage of the perfusion fluid caused by the extrusion or distortion of the incision, thereby improving the stability of the anterior chamber and reducing the probability of surges.

Description

Ultrasonic emulsification perfusion assembly

Technical Field

The invention relates to the field of ophthalmic cataract phacoemulsification surgery, in particular to a phacoemulsification perfusion assembly.

Background

The optical elements of the eye include the cornea and the lens. The lens and cornea work together to focus light onto the retina at the back of the eye. The lens may also change shape, adjusting the focus of the eye to change between viewing near and distant objects. With age, opacification of the lens or cataracts is quite common. Cataracts can be treated by replacing the opacified lens with an intraocular lens. Phacoemulsification systems typically use ultrasonic energy to break up the lens and aspirate the lens from within the capsular bag.

Phacoemulsification systems typically include: 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. In the operation process, a small incision of about 2-3 mm is required to be made on the edge of the cornea, and the ultrasonic emulsification needle head enters the anterior chamber of the eyeball through the incision to realize emulsification and suction of the turbid crystalline lens.

The working principle of the ultrasonic emulsification system is as follows: the electric energy is converted into mechanical energy with high-speed micro amplitude by using an electric-acoustic conversion body of a power ultrasonic signal source, the amplitude is amplified by the energy accumulation of an ultrasonic emulsification handle, the mechanical vibration is acted on human tissues through a connected ultrasonic emulsification needle head to assist the functions of crushing, cutting, emulsification, suction, blood coagulation and the like, the crushed and emulsified cataract is sucked out of a human body, the cutting, crushing and emulsification of the cataract are realized, meanwhile, the ultrasonic emulsification needle head is connected with a suction system to realize the suction of the cataract, and the cataract surgery is completed through the implantation of an artificial lens.

Typically, the phacoemulsification needle is made of titanium alloy or other metal material, as disclosed in CN104055620B and CN107530102A, and has an integral structure comprising an elongated metal tube with a threaded end. The size of the operation incision is directly influenced by the outer diameter of the ultrasonic emulsification needle head, the influence of a small incision on a cornea is small, the degree of postoperative astigmatism is reduced, the risk of an operation is reduced, and the recovery time of a patient is shortened. The inner diameter of the ultrasonic emulsification needle head directly influences the suction speed of cataract, in order to pursue smaller incision and higher suction speed, the outer diameter and the wall thickness of the needle head are required to be smaller and better, so that the ratio of the length to the diameter of an inner hole is very large, the processing difficulty is improved, the processing cost is increased, the ultrasonic emulsification needle head is used as a disposable accessory, and the overhigh price brings great economic pressure to hospitals and patients; meanwhile, the hard tip of the metal needle can easily puncture the lens capsule or other tissues of the eye.

As disclosed in chinese patent CN102281841A, a soft silicone rubber infusion sleeve is usually provided on the outside of the phacoemulsification needle, and has a shape substantially the same as that of the phacoemulsification needle. After the phacoemulsification needle and the silicone rubber infusion sleeve extend into a surgical incision, if the incision is not proper, the infusion sleeve is twisted or the force of a doctor is uneven, the phacoemulsification needle can extrude the infusion sleeve and the incision, and if the ultrasonic energy is used again, the phacoemulsification needle vibrates to generate heat due to friction to cause incision burn, so that the cornea is astigmatic and even difficult to recover and the like. On the other hand, due to the above conditions, the soft silicone infusion sleeve may also suffer from poor infusion or even blockage, which may cause insufficient anterior chamber perfusion fluid to cause large anterior chamber fluctuation or collapse, thereby bringing about surgical risks.

Disclosure of Invention

The invention provides a safe and reliable phacoemulsification irrigation assembly aiming at the problems of manufacturing difficulty and operation risk.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a phacoemulsification irrigation assembly, comprising:

the proximal end of the metal connecting body is fixed with the ultrasonic emulsification handle;

the proximal end of the plastic needle tube is arranged in the metal connecting body in a penetrating way and is provided with a suction channel which penetrates through the ultrasonic emulsification handle along the axis;

the metal perfusion sleeve is provided with a water inlet positioned at the near end and a perfusion opening positioned at the far end, and the farthest end of the metal perfusion sleeve is provided with a necking structure which is always matched with the outer wall of the plastic needle tube to seal the perfusion channel.

Preferably, the phacoemulsification irrigation assembly further comprises a plastic clamping irrigation sleeve which is sleeved outside the metal infusion sleeve and has an inner diameter larger than that of the metal infusion sleeve to form a liquid storage space, the proximal end of the plastic clamping irrigation sleeve is fixed with the phacoemulsification handle, the distal end of the plastic clamping irrigation sleeve is a contraction portion, and the minimum inner diameter of the contraction portion is smaller than the outer diameter of the metal infusion sleeve to form a closed point at the distal end of the plastic clamping irrigation sleeve for the liquid storage space; the water inlet and the filling port are respectively positioned at two sides of the closed point, and the water inlet is positioned in the liquid storage space.

Preferably, the metal connecting body sequentially comprises a fastening part, a threaded part and a locking part from far to near, the threaded part is provided with an external thread matched with the ultrasonic emulsification handle, and the locking part is provided with at least one notch arranged axially.

Preferably, the metal connecting body comprises a first inner hole at the proximal end and a second inner hole at the distal end, and the first inner hole is communicated with the notch;

the plastic needle tube is arranged in a first inner hole of the metal connector in a penetrating mode, and the plastic needle tube is fixed with the metal connector under the effect that the ultrasonic emulsification handle shell compresses the notch and the first inner hole;

the inner diameter of the second inner hole is larger than that of the first inner hole, the near end of the metal perfusion casing pipe is inserted into the second inner hole, and the second inner hole and the metal perfusion casing pipe are in tight fit.

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

Preferably, the plastic needle tube is made of elastic plastic.

Preferably, the water inlet and the filling opening are both arranged on the side wall of the metal filling sleeve.

Preferably, the constriction is conical, the smallest internal diameter of the constriction being at its most distal end.

Preferably, the length of the metal perfusion sleeve is smaller than that of the plastic needle tube, and the length of the plastic clamping perfusion sleeve is smaller than that of the metal perfusion sleeve.

The present invention also discloses in more detail a phacoemulsification irrigation assembly comprising:

the proximal end of the metal connecting body is fixed with the ultrasonic emulsification handle and comprises a first inner hole positioned at the proximal end and a second inner hole positioned at the distal end; the inner diameter of the second inner hole is larger than that of the first inner hole; the first inner hole is a through hole, and the second inner hole is a counter bore;

the plastic needle tube is provided with a suction channel which penetrates through the plastic needle tube along the axis and is arranged in the first inner hole of the metal connecting body in a penetrating way;

a metal perfusion sleeve with a near end inserted into the second inner hole in a tight fit manner, the metal perfusion sleeve and the plastic needle tube are coaxially arranged, a perfusion channel is formed between the metal perfusion sleeve and the plastic needle tube, a water inlet positioned at the near end and a perfusion port positioned at the far end are arranged on the side wall of the metal perfusion sleeve, the perfusion channel is communicated with the water inlet and the perfusion port, the far end of the metal perfusion sleeve is provided with a necking structure, and the necking structure is always matched with the outer wall of the plastic needle tube to seal the perfusion channel,

the plastic clamping perfusion sleeve is sleeved outside the metal perfusion sleeve, the inner diameter of the plastic clamping perfusion sleeve is larger than that of the metal perfusion sleeve to form a liquid storage space, the near end of the plastic clamping perfusion sleeve is fixed with the ultrasonic emulsification handle through threads, the far end of the plastic clamping perfusion sleeve is a conical contraction part, and the minimum inner diameter of the far end of the contraction part is smaller than the outer diameter of the metal perfusion sleeve to form a closed point at the far end of the liquid storage space; the water inlet and the filling port are respectively positioned at two sides of the closed point, and the water inlet is positioned in the liquid storage space.

The invention has the following beneficial effects: the super-breast syringe needle formed by combining the metal connector and the plastic needle tube solves the problem of difficult manufacture of a slender syringe needle, can realize micro-incision operation and reduce astigmatism caused by the operation; the slender needle head can also improve the stability of the anterior chamber and reduce the occurrence probability of surge;

the relatively soft plastic needle tip also reduces the probability of puncturing the capsular bag;

the metal perfusion sleeve effectively isolates the extrusion of the body of the super-mammary needle and the incision, thereby greatly reducing or even eliminating the incision burn caused by ultrasonic friction;

the harder metal perfusion sleeve effectively prevents the reduction or blockage of perfusion fluid caused by the extrusion or distortion of the cut, thereby improving the stability of the anterior chamber and reducing the occurrence probability of surging.

Drawings

FIG. 1 is a perspective view of the metal connector and plastic needle tube of the present invention;

FIG. 2 shows a cross-sectional view of the mating of the metal connector and plastic needle cannula of the present invention;

FIG. 3 shows a cross-sectional view of the metal connector, plastic needle cannula and phacoemulsification handle of the present invention mated together;

FIG. 4 shows a schematic perspective view of the assembled metal infusion sleeve of FIG. 1;

FIG. 5 shows a cross-sectional view of the structure of FIG. 4;

FIG. 6 shows a schematic perspective view of the plastic clamping irrigation sleeve assembled on the base of FIG. 4;

fig. 7 shows a cross-sectional view of the structure of fig. 6.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art in light of these embodiments are intended to be within the scope of the present invention.

The invention discloses a surgical instrument, in particular to an ultrasonic emulsification perfusion assembly suitable for cataract and superfragmentation, which comprises: the device comprises a metal connector 1, a plastic needle tube 2, a metal perfusion sleeve 3 and a plastic clamping perfusion sleeve 4.

As shown in fig. 1, 2 and 3, the metal connector 1 includes 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 external diameter of the threaded portion 104 is the largest among the three.

The locking portion 102 has at least one axially disposed notch 103, two symmetrically disposed in the preferred embodiment. The metal connector 1 comprises a first inner hole 105 positioned at the near end and a second inner hole 106 positioned at the far end, wherein the first inner hole 105 is a through hole penetrating through the metal connector 1 along the axis, and the second inner hole 106 is a counter bore with an opening at the far end. The first bore 105 is in communication with the cutout 103.

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 plastic needle tube 2 is made of elastic plastic such as PEEK, and the probability of puncturing the lens capsule bag is reduced due to the relatively soft tip of the plastic needle.

The proximal end of the plastic needle tube 2 is inserted into the first inner hole 105 of the metal connector 1.

When the cataract emulsifying device works, the ultrasonic emulsifying handle 9 converts electric energy into 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.

In the preferred embodiment, the fastening portion 101 is a wrench tool action surface having a shape and size compatible with a wrench tool, and the wrench tool is used to fixedly connect the metal connecting body 1 to the distal end of the phacoemulsification handle 9 by acting on the fastening portion 101.

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 during screwing, that is, the proximal end side of the locking portion 102 is gathered and abuts against the inner wall of the phacoemulsification handle. 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.

Referring to fig. 4 and 5, an inner diameter of the second inner hole 106 of the metal connecting body 1 is larger than an inner diameter of the first inner hole 105, the main body of the metal pouring sleeve 3 is cylindrical, and a proximal end of the metal pouring sleeve 3 is axially inserted into the second inner hole 106, and the metal pouring sleeve 3 and the plastic needle tube 2 are tightly fitted, so that the metal pouring sleeve 3 and the plastic needle tube 2 are coaxial after installation. The length of the metal perfusion casing 3 is slightly smaller than that of the plastic needle tube 2.

As shown in fig. 5, the metal perfusion casing 3 is provided with a water inlet 301 located at the proximal end and a perfusion opening 302 located at the distal end, and both the water inlet 301 and the perfusion opening 302 are opened on the side wall of the metal perfusion casing 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 perfusion sleeve 3 and the plastic needle tube 2 are coaxially arranged, the inner diameter of the metal perfusion sleeve 3 is larger than the outer diameter of the plastic needle tube 2, and a perfusion channel 3201 is formed between the metal perfusion sleeve 3 and the plastic needle tube 2 after installation, namely the perfusion channel 3201 is positioned on the inner side of the metal perfusion sleeve 3 and on the outer side of the plastic needle tube 2. The perfusion fluid enters from the water inlet 301, passes through the perfusion channel 3201 and then flows out from the perfusion opening 302.

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

As shown in fig. 6 and 7, a plastic clamping perfusion sleeve 4 is sleeved outside the metal perfusion sleeve 3. The plastic gripping irrigation sleeve 4 may also be a fitting to the phacoemulsification handpiece 9, as is well known to those skilled in the art.

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 perfusion sleeve 3, and has an inner diameter larger than that of the metal perfusion 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 perfusion sleeve 3 to form a closed point at the distal end to the liquid storage space 4301 by interference fit. The constriction 401 is conical, with the smallest inner diameter of the constriction 401 being 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.

It is well known to those skilled in the art that when the plastic clamping irrigation sleeve 4 is used as a fitting of the phacoemulsification handpiece 9, it is only necessary to ensure that the perfusion fluid smoothly enters the water inlet 301 from the phacoemulsification handpiece 9, for example, a closed pipeline is used, etc.

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.

In the invention, the side close to the operator is taken as a near end, and the side far away from the operator is taken as a far 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 these modifications and adaptations should be considered within the scope of the invention.

Claims

1. a phacoemulsification perfusion assembly, is characterized in that, comprises

a metal connector (1), the proximal end of which is fixed to the phacoemulsification handle (9);

a plastic needle tube (2), the proximal end of which is penetrated into the metal connector (1), and has a suction channel (202) extending through the phacoemulsification handle (9) along the axis;

A metal perfusion cannula (3), the proximal end of which is fixed to the metal connecting body (1), and is coaxially arranged with the plastic needle tube (2) and forms an perfusion channel (3201) therebetween, the metal The irrigation cannula (3) is provided with a water inlet (301) at the proximal end and an irrigation port (302) at the distal end, the most distal end of which has a constricted structure (303) that is always matched with the outer wall of the plastic needle tube (2) The perfusion channel (3201) is closed.

2 . The phacoemulsification perfusion assembly according to claim 1 , further comprising a plastic clamping perfusion sleeve ( 4 ) sleeved on the outside of the metal perfusion sleeve ( 3 ) and having an inner diameter larger than that of the metal perfusion sleeve ( 3 ). 3 . The cannula (3) is perfused to form a liquid storage space (4301), the proximal end of which is fixed with the phacoemulsification handle (9), and the distal end is a constricted portion (401), and the minimum inner diameter of the constricted portion (401) is less than The outer diameter of the metal perfusion sleeve (3) forms a closed point at the distal end of the liquid storage space (4301); the water inlet (301) and the perfusion port (302) are located at two points of the closed point, respectively. side, and the water inlet (301) is located in the liquid storage space (4301).

3. The phacoemulsification perfusion assembly according to claim 1, wherein the metal connecting body (1) comprises a fastening part (101), a threaded part (104) and a locking part ( 102), the threaded portion (104) has an external thread adapted to the phacoemulsification handle (9), and the locking portion (102) has at least one axially arranged cutout (103).

4. The phacoemulsification perfusion assembly according to claim 3, wherein 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 , the first inner hole (105) communicates with the cutout (103);

The plastic needle tube (2) is passed through the first inner hole (105) of the metal connector (1), and the incision (103) and the first inner hole are compressed in the shell of the phacoemulsification handle (9). Under the action of (105), the plastic needle tube (2) is fixed with the metal connector (1);

The inner diameter of the second inner hole (106) is larger than the inner diameter of the first inner hole (105), the proximal end of the metal perfusion cannula (3) is inserted into the second inner hole (106), and the two are closely matched.

5. The phacoemulsification perfusion assembly according to claim 1, wherein the distal end of the plastic needle tube (2) is a wedge-shaped structure (201).

6. The phacoemulsification perfusion assembly according to claim 1, wherein the plastic needle tube (2) is made of elastic plastic.

7 . The phacoemulsification perfusion assembly according to claim 1 , wherein the water inlet ( 301 ) and the perfusion port ( 302 ) are both opened on the side wall of the metal perfusion sleeve ( 3 ). 8 .

8 . The phacoemulsification perfusion assembly according to claim 1 , wherein the constricted portion ( 401 ) is conical, and the smallest inner diameter of the constricted portion ( 401 ) is located at its most distal end. 9 .

9. The phacoemulsification perfusion assembly according to claim 1, wherein the length of the metal perfusion sleeve (3) is smaller than the length of the plastic needle tube (2), and the plastic clamping perfusion sleeve (4) The length is less than the length of the metal pouring sleeve (3).

10. A phacoemulsification perfusion assembly, comprising:

A metal connector (1), the proximal end of which is fixed to the phacoemulsification handle (9), and includes a first inner hole (105) at the proximal end and a second inner hole (106) at the distal end; the The inner diameter of the second inner hole (106) is larger than the inner diameter of the first inner hole (105); the first inner hole (105) is a through hole, and the second inner hole (106) is a counterbore;

a plastic needle tube (2), having a suction channel (202) penetrating along the axis, and passing through the first inner hole (105) of the metal connecting body (1);

A metal perfusion cannula (3), the proximal end of which is tightly fitted into the second inner hole (106), and is coaxially arranged with the plastic needle tube (2) with an perfusion channel (3201) formed therebetween. ), the side wall of the metal perfusion sleeve (3) is provided with a water inlet (301) at the proximal end and a perfusion port (302) at the distal end, the perfusion channel (3201) and the water inlet ( 301) communicates with the perfusion port (302), the most distal end of the metal perfusion cannula (3) has a constriction structure (303), and the constriction structure (303) always cooperates with the outer wall of the plastic needle tube (2) to seal the place. described perfusion channel (3201),

and a plastic clamping and pouring sleeve (4), sleeved on the outside of the metal pouring sleeve (3) and having an inner diameter larger than the metal pouring sleeve (3) to form a liquid storage space (4301), the proximal end of which is connected to the The phacoemulsification handle (9) is threadedly fixed, and the distal end is a conical constricted portion (401), and the minimum inner diameter of the distal end of the constricted portion (401) is smaller than the outer diameter of the metal perfusion cannula (3). The liquid storage space (4301) forms a closed point at the distal end; the water inlet (301) and the filling port (302) are respectively located on both sides of the closed point, and the water inlet (301) is located at the Inside the liquid storage space (4301).