CN209770652U

CN209770652U - Heat-insulation shock-absorption filling casing pipe

Info

Publication number: CN209770652U
Application number: CN201821241193.XU
Authority: CN
Inventors: 王振环
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-08-02
Filing date: 2018-08-02
Publication date: 2019-12-13
Anticipated expiration: 2028-08-02

Abstract

The utility model discloses a perfusion sleeve of a phacoemulsification instrument, which mainly comprises a front part, a middle part and a rear part. The front part is thin, the inner surface is provided with side-by-side spiral grooves, and the front end is provided with an opening. The liquid flowing into the eye in the groove can absorb the heat of the super-breast needle head, thereby playing a role in cooling. The edge of the groove has the elastic supporting and damping functions, so that the contact area between the pipe wall and the super-breast needle is reduced, the heat conduction between the super-breast needle and the pipe wall is reduced, and further, the heat damage of the super-breast needle to the corneal tissues is reduced. The edge of the groove can play a good mechanical buffering role through the elastic deformation of the edge, reduce the mechanical vibration energy transmitted to the corneal tissue and reduce the mechanical vibration damage of the corneal tissue. The inner surface of the rear part is provided with a coupling structure, so that the rear part is conveniently fixed at the front end of the hand piece. The middle portion is connected between the front portion and the rear portion.

Description

Heat-insulation shock-absorption filling casing pipe

Technical Field

The utility model relates to a perfusion sleeve for surgical operation, in particular to a heat-insulation and shock-absorption perfusion sleeve for a cataract ultrasonic emulsification instrument.

Background

Cataract is a common frequently encountered disease in ophthalmology. Normally, the lens in the human eye is shaped like a biconvex lens, which focuses light entering the eye onto the fundus retina. Many factors can degrade lens clarity, such as age or disease. The clouding of the lens causes a reduction in vision and the formation of cataracts. The most effective and most common method for clinically treating cataract at present is to surgically remove the clouded crystalline lens and simultaneously implant a transparent intraocular lens to enable external light to be focused on the retina.

At present, the development trend of cataract surgery is small incision and minimal invasion, and the cataract ultrasonic breast surgery is the most common surgical method in clinic at present. In the operation process, the slender ultrasonic emulsification needle head enters the eye through a tiny incision on the wall of the eye, the high-frequency vibration of the ultrasonic emulsification needle head can crush emulsified crystalline lens tissues, and then the ultrasonic emulsification instrument sucks the crushed crystalline lens tissues out of the eye through negative pressure. After the clouded portion of the lens is completely removed, a clear intraocular lens may be implanted.

The ultrasonic emulsification instrument mainly comprises the following parts: the device comprises a hand piece, an ultrasonic emulsification needle head, a perfusion sleeve, an electronic control console, a connecting pipeline and a connecting cable. The hand piece is connected with the electronic control console through a connecting pipeline and a connecting cable. The front end of the handpiece receives a phacoemulsification needle and an irrigation cannula. The perfusion sleeve is sleeved outside the ultrasonic emulsification needle head, the front end of the perfusion sleeve is opened, and the front end of the ultrasonic emulsification needle head can extend out of the opening at the front end of the perfusion sleeve. The phacoemulsification needle is of a tubular hollow structure, and the rear end of the phacoemulsification needle is communicated with a negative pressure suction pipeline from the hand piece to the console.

During use, the anterior portions of both the irrigation cannula and the phacoemulsification needle enter the eye through a small incision in the cornea or sclera. The inner diameter of the irrigation sleeve is larger than the outer diameter of the needle, and the irrigation fluid enters the eye through the space between the irrigation sleeve and the phacoemulsification needle or another irrigation channel. The high frequency vibrating phacoemulsification needle can crush the emulsified lens tissue. The console can control the relevant parameters of the negative pressure and the ultrasonic energy, and the emulsified tissue is sucked out through the open end of the ultrasonic emulsification needle head and the negative pressure suction pipeline. However, the phacoemulsification needle vibrates at a high frequency under the driving of ultrasonic waves, and generates heat, and the heat is transmitted to eye tissues through the tube wall of the perfusion cannula, so that the incision tissues are thermally damaged. Meanwhile, the mechanical vibration of the ultrasonic emulsification needle head can be transmitted to the tissue at the incision from the tube wall, so that the high-frequency vibration of the tissue at the incision is caused, and further the local tissue is damaged. Moreover, high frequency vibrations of the tissue surrounding the incision can also cause further local temperature increases, further exacerbating thermal damage. The adverse consequences caused by tissue injury at the incision are local tissue deformation, poor incision closure, increased risk of postoperative incision leakage, endophthalmitis, and the like. And meanwhile, scar formation and corneal astigmatism after operation are aggravated, and the vision after operation is not ideal. However, at present, no attention cannula which is effectively focused on the heat insulation and shock absorption functions can be utilized, so that a novel perfusion cannula which can effectively reduce heat conduction and mechanical vibration conduction is urgently needed, the damage of tissues at an incision is reduced, and the operation effect is improved.

Disclosure of Invention

The present disclosure describes a protective infusion sleeve that generally includes a front portion, a middle portion, and a rear portion. The front portion is thin and has side-by-side helical grooves on the inner surface. The inner surface of the rear part is provided with a coupling structure, so that the rear part is conveniently fixed at the front end of the hand piece. The middle portion is connected between the front portion and the rear portion.

Various aspects can include one or more of the following features. The axis of the perfusion casing is in a linear shape or an arc shape. The diameter of the front part of the sleeve is thinner, the diameter of the front end of the front part of the sleeve is further reduced to form a front end opening with a smaller diameter, and one or more sleeve side holes are formed in the side surface of the front end. The sleeve middle portion is located between the sleeve front portion and the sleeve rear portion. The middle of the sleeve has an alternating cross-sectional diameter, and one or more portions thereof may have a tapered cross-section. The cannula has a larger diameter at the rear section and a coupling structure on its inner surface that can be received on a phacoemulsification handle.

Various aspects can also include one or more of the following features. The outer surface of the front portion of the sleeve is smooth. The inner surface of the partial section of the casing front portion has a plurality of helical grooves side by side. The included angle between the tangential direction of the groove and the axis of the perfusion casing is between 0 degree and 90 degrees. In some cases, the cross-sectional shape of the groove is an inverted trapezoid. In other cases, the cross-sectional profile of one or more portions of the groove can have other beneficial shapes, such as, but not limited to, a semi-circular shape, a triangular shape, a "U" shape, an "︺" shape, a double parabolic shape, and the like. The edges of the groove are ridged. In some cases, the edge ridge has a trapezoidal cross-sectional shape. In other cases, the cross-sectional profile of one or more portions of the edge ridge may have other beneficial shapes, such as, but not limited to, a semi-circular shape, a triangular shape, a "U" shape, an "︺" shape, a double parabolic shape, and the like. In some embodiments, the edge ridge has one or more discontinuities to allow communication between adjacent grooves.

The following description is intended to set forth one or more implementation details of the disclosure. The described embodiments are only some, not all embodiments of the invention.

The drawings are briefly described as follows.

FIG. 1 is a cross-sectional view of an example irrigation sleeve.

FIG. 2 is a longitudinal cross-sectional view of the exemplary irrigation sleeve shown in FIG. 1 in an operational state.

FIG. 3 is a cross-sectional view of the exemplary irrigation sleeve shown in FIG. 1 in an operational state.

Detailed Description

The present disclosure relates to an accessory for a surgical instrument for use in surgery. In particular, the present disclosure relates to an irrigation sleeve attached to the front end of a phacoemulsification handpiece for use in phacoemulsification procedures.

fig. 1 shows an example irrigation sleeve 100. Irrigation sleeve 100 includes a forward portion 103, a middle portion 102, and a rearward portion 101. The front portion 103 is thin and has side-by-side helical grooves 111 on the inner surface. The rear inner surface has a coupling structure 108. The irrigation sleeve 100 has a linear or arcuate axis. The front portion 103 is of a smaller diameter, the front end 104 of the front portion 103 is further reduced in diameter and defines a smaller diameter front opening 105, and the side of the front end 104 is provided with one or more cannula side holes 107. The middle portion 102 is located between the front portion 103 and the rear portion 101. The middle portion 102 has an alternating cross-sectional diameter, one or more portions of which may have a tapered cross-section. The rear portion 101 is of larger cross-sectional diameter and has a coupling structure 108 on its inner surface that can be received on a phacoemulsification handpiece (not shown). The inner surface of a partial section of the front part 103 is provided with a plurality of spiral grooves 111 side by side. The tangential direction of the groove 111 makes an angle between 0 ° and 90 ° with the axis of the infusion cannula. In some cases, the cross-sectional shape of the groove 111 is an inverted trapezoid. In other instances, the cross-sectional profile of one or more portions of the groove 111 has other beneficial shapes, such as, but not limited to, a semi-circular shape, a triangular shape, a "U" shape, an "︺" shape, a double parabolic shape, and the like. The edges of the groove 111 form edge ridges 106. In some cases, the cross-sectional shape of the edge ridge 106 is trapezoidal. In other instances, the cross-sectional profile of one or more portions of the edge ridge 106 may take on other beneficial shapes, such as, but not limited to, a semi-circle, a triangle, a "U" shape, an "︺" shape, a double parabola, and the like. In some embodiments, the edge ridge 106 has one or more discontinuities 114 that allow adjacent grooves 111 to communicate.

Fig. 2 and 3 show the front part 103 in an operating state. The anterior portion 103 passes through corneal tissue 110 into the eye. A breastfeeding needle 109 extends through the front 103 and protrudes from the front opening 105. The wall 113 of the front end 103 is pressed against the corneal tissue 110 and deformed, a part of the edge ridge 106 is in contact with the transmammary needle 109, and a perfusion interspace 112 is formed between the other part of the wall 113 and the transmammary needle 109. Perfusate can flow into the eye through the grooves 111 and the perfusion voids 112. The ultra-milk needle 109 is ultrasonically driven to vibrate at a high frequency to break up the lens tissue (not shown) in contact therewith, and the negative pressure suction of the ultra-milk handle draws the broken up lens tissue and intraocular fluid out through the needle lumen 115 of the ultra-milk needle 109. The high frequency vibration of the superfusion needle 109 can rapidly raise the temperature of the superfusion needle, but the heat of the superfusion needle 109 is absorbed in the process that the perfusion fluid flows into the eyes through the groove 111 and the perfusion gap 112, and the effective cooling effect is achieved. On the other hand, due to the elastic support and cushioning effect of the edge ridge 106, the contact area between the wall 113 of the front portion 103 and the hyper milk needle 109 is significantly reduced, reducing the heat conduction between the hyper milk needle 109 and the wall 113 and, in turn, reducing the thermal damage to the corneal tissue 110. Meanwhile, for the high-frequency mechanical vibration of the super-breast needle 109, the edge ridge 106 can play a good buffering role through the elastic deformation of the edge ridge, so that the mechanical vibration energy transmitted to the corneal tissue 110 is obviously reduced, and the mechanical vibration damage of the corneal tissue is reduced.

The scope of the present disclosure is not intended to be limited or restricted to the implementations and details described herein. Moreover, the disclosure in its broader aspects is not limited to the specific details, and illustrative examples set forth herein. Additional advantages and modifications will readily appear to those skilled in the art. Accordingly, departures may be made from such details without departing from the spirit or scope of the applicant's general or inventive concept. Accordingly, other implementations are within the scope of the claims herein.

Claims

1. A heat insulating and shock absorbing potting sleeve, comprising: a front portion; a middle part; and a rear portion; the middle portion is connected between the front portion and the rear portion; the inner surface of the front part is provided with side-by-side spiral grooves; the front end of the front part is gradually reduced in diameter; the side surface of the front end is provided with one or more sleeve side holes;

The included angle between the tangential direction of the groove and the axis of the perfusion sleeve is between 0 degree and 90 degrees; the edge of the groove forms an edge ridge which can elastically deform; the edge ridge has one or more breakpoints, so that adjacent grooves can be communicated; part of the segment of the edge ridge is contacted with the ultra-milk needle; a perfusion gap is formed between the other part of the tube wall and the super-breast needle head; the perfusate can flow into the eye through the groove and the perfusion gap.

2. The irrigation sleeve of claim 1 wherein the groove is inverted trapezoidal, semi-circular, triangular, "U" -shaped, "︺" -shaped, or double parabolic; the edge ridge is in the shape of an inverted trapezoid, a semicircle, a triangle, a 'U' -shape, an '︺' -shape or a double parabola.

3. The irrigation sleeve of claim 2 wherein the forward end of the forward portion is tapered in diameter.

4. The irrigation sleeve of claim 2 wherein the forward end of the forward portion is formed with a forward end opening.

5. The irrigation sleeve of claim 1 wherein the rear inner surface has a coupling structure.

6. The irrigation sleeve of claim 1 wherein the central portion has a varying cross-sectional diameter and one or more portions thereof have a tapered cross-section.