CN113367886A

CN113367886A - Flute needle

Info

Publication number: CN113367886A
Application number: CN202110698691.7A
Authority: CN
Inventors: 丁小燕; 张钊填; 周小迪
Original assignee: Zhongshan Ophthalmic Center
Current assignee: Zhongshan Ophthalmic Center
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2021-09-10

Abstract

The invention discloses a flute needle, which comprises a base with a cavity, a needle tube with a tube hole, an adjusting rod rotationally mounted on the base, and a gear mounted on the adjusting rod and synchronously rotating with the adjusting rod; a rack meshed with the gear is arranged on the side surface of the outer circumference of the needle tube and extends along the axial direction of the needle tube; the needle tube is provided with a first end which is arranged in the cavity in a sliding way and a second end which is provided with a convex part and is positioned outside the cavity; and the outer circumferential side surface of the second end of the needle tube is provided with a drainage hole communicated with the tube hole, and the outer surface of the convex part is a spherical surface. The invention can adjust the extending length of the needle tube, the needle tube is provided with the convex part and the drainage hole, not only can realize gas-liquid exchange, but also can fix an inner boundary valve, and belongs to the technical field of medical appliances.

Description

Flute needle

Technical Field

The invention relates to the technical field of medical appliances, in particular to a flute needle.

Background

At present, the modern vitreoretinal surgery technology is more and more popular, and a large number of patients with retinal detachment blindness can be effectively treated in time. The combination of vitrectomy surgery with Inner Limiting Membrane (ILM) removal and intraocular vitreous filler filling is a conventional method for treating Macular Hole (MH), but the postoperative effects of vision and MH closure rate still need to be further improved. ILM flap surgery refers to the procedure of stuffing the MH with the ILM flaps around the MH inverted inside out. The ILM flap-over operation is one of important improvement methods of MH vitreous cutting operation, and has good treatment effect on complicated and special MH with larger diameter and MH unclosed after ILM peeling operation; compared with the conventional vitreous cutting operation combined with ILM stripping, the MH closure rate can be improved, and the vision of a patient is improved. ILM valve eversion requires that a range of the inner limiting membrane "skirt" be retained around the ostium rather than being completely stripped off, at which time the ILM valve can be suspended in the vitreous cavity and then trimmed with a vitreous cutting head or vitreous scissors. The flute needle is one of indispensable apparatus of vitreous body operation, and it can be used for carrying out gas-liquid exchange, removing hematocele in the eye, negative pressure suction, separating after the vitreous body, reposition retina, etc. in vitreous body operation.

At present, the ILM flap-turning operation has some defects, on one hand, the length of a needle tube of a cartesian needle cannot be adjusted, and on the other hand, the flap-turning ILM can be free by itself during gas-liquid exchange, and the flap-turning ILM can rotate or shift in the process of injecting heavy water and the like. At present, the displaced ILM valve is mainly adjusted by vitreous forceps, and the ILM valve cannot be fixed by the existing cartesian needle.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention aims to: the invention provides a flute needle, which can adjust the extending length of a needle tube, wherein the needle tube is provided with a bulge part and a drainage hole, so that gas-liquid exchange can be realized, and an inner boundary valve can be fixed.

In order to achieve the purpose, the invention adopts the following technical scheme:

a flute needle comprises a base with a cavity, a needle tube with a tube hole, an adjusting rod rotationally mounted on the base, and a gear mounted on the adjusting rod and synchronously rotating with the adjusting rod; a rack meshed with the gear is arranged on the side surface of the outer circumference of the needle tube and extends along the axial direction of the needle tube;

the needle tube is provided with a first end which is arranged in the cavity in a sliding way and a second end which is provided with a convex part and is positioned outside the cavity; and the outer circumferential side surface of the second end of the needle tube is provided with a drainage hole communicated with the tube hole, and the outer surface of the convex part is a spherical surface.

Further, a first limiting seat and a second limiting seat are arranged on the inner wall of the cavity; the first limiting seat and the second limiting seat are arranged at intervals along the sliding direction of the needle tube, and the side surface of the outer circumference of the needle tube is fixedly provided with a positioning seat; the positioning seat is positioned between the first limiting seat and the second limiting seat.

Furthermore, the whistle needle also comprises a hose and an elastic air bag; the elastic air bag is provided with an air cavity, one end of the hose is communicated with the first end of the needle tube, and the other end of the hose is communicated with the air cavity.

Further, a handle is arranged on the adjusting rod.

Further, the whistle needle also comprises a brake plate and a spring; the adjusting rod is slidably mounted on the seat body and provided with a third end connected with the handle and a fourth end used for abutting against the brake plate, the fourth end of the adjusting rod is located in the cavity, the spring is clamped between the brake plate and the inner wall of the cavity, the brake plate is located between the needle tube and the spring, and the gear is located between the brake plate and the handle;

the brake plate is switched between a braking position and a starting position, when the brake plate is located at the braking position, the brake plate is abutted against the outer circumferential side face of the needle tube, and the gear is separated from the rack; when the brake plate is located at the starting position, the gear is meshed with the rack, and the brake plate compresses the spring and is separated from the outer circumferential side face of the needle tube.

Furthermore, the brake plate is provided with an arc groove matched with the outer circumferential side surface of the needle tube.

Furthermore, an anti-skid rubber sheet is arranged in the arc groove.

Furthermore, a sliding groove is formed in the inner wall of the cavity, and the brake plate is installed in the sliding groove in a sliding mode.

Further, the hose is a transparent pipe, and a valve body is installed on the hose.

Furthermore, the base is provided with anti-skid stripes.

Compared with the prior art, the invention has the beneficial effects that: the length of the extending needle tube can be adjusted by firstly pressing the adjusting rod and then rotating the adjusting rod, and when the adjusting rod is not pressed, the needle tube is in a fixed state to avoid the needle tube sliding in the using process. The needle tubing has bellying and drainage hole, and the gas-liquid exchange can be realized to the drainage hole, and the bellying both can fix interior boundary diaphragm lamella, also can do the massage of macula lutea hole edge. The invention has simple structure, convenient and simple use and easy popularization and use.

Drawings

Fig. 1 is a front view of a cartesian needle.

Fig. 2 is a schematic view of the brake plate of the cartesian needle in the braking position.

Fig. 3 is a schematic view of the brake plate of the cartesian needle in the activated position.

In the figure, 1 is a base, 2 is a needle tube, 3 is an adjusting rod, 4 is a gear, 5 is a rack, 6 is a handle, 7 is a hose, 8 is an elastic air bag, 9 is a braking plate, 10 is a spring, 11 is a first limiting seat, 12 is a second limiting seat, 13 is a positioning seat, 101 is a cavity, 102 is a sliding groove, 201 is a tube hole, 202 is a convex part, 203 is a drainage hole, 801 is an air cavity, 901 is an arc groove, and 902 is an anti-slip film.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

For convenience of description, unless otherwise noted, the up-down direction described below coincides with the up-down direction of fig. 1 itself, the front-back direction described below coincides with the front-back direction of fig. 1 itself, and the left-right direction described below coincides with the left-right direction of fig. 2 itself.

As shown in fig. 1 to 3, the present embodiment provides a cartesian needle, which includes a base 1 having a cavity 101, a needle tube 2 having a tube hole 201, an adjusting lever 3 rotatably mounted on the base 1, and a gear 4 mounted on the adjusting lever 3 and rotating synchronously with the adjusting lever 3; a rack 5 meshed with the gear 4 is arranged on the side surface of the outer circumference of the needle tube 2, and the rack 5 extends along the axial direction of the needle tube 2; the needle tube 2 can slide back and forth, and the extension length of the left end of the needle tube 2 can be adjusted by rotating the adjusting rod 3.

The needle tube 2 has a first end slidably mounted in the cavity 101 and a second end provided with a protrusion 202 and located outside the cavity 101; the outer circumferential side surface of the second end of the needle tube 2 is provided with a drainage hole 203 communicated with the tube hole 201, and the outer surface of the convex part 202 is a spherical surface. The base 1 is provided with a needle hole communicated with the cavity 101, and the needle tube 2 penetrates through the needle hole and extends out of the cavity 101. The drainage holes 203 are formed in the side face of the needle tube 2, the drainage holes 203 are used for gas-liquid exchange, and all liquid is flushed towards the drainage holes 203 in the side face of the needle tube 2 during gas-liquid exchange, so that the liquid is guaranteed. The second end of the existing needle tube 2 is generally a tip and is provided with a drainage hole 203, the second end of the needle tube 2 of the present application is provided with a convex part 202, the outer surface of the convex part 202 is a spherical surface, and the maximum diameter of the convex part 202 is 0.5 mm. The radian of the spherical surface is matched with the shape of the macular hole. The bulge 202 can lean on the fixed of realizing interior membrane lamella on interior membrane lamella through the surface, and the medical personnel of being convenient for prune with vitreous cutting head or vitreous body scissors, when the heavy water of injection of gas-liquid exchange, under the fixed help of flute needle, the ILM lamella of upset will be difficult for dissociating. In addition, the bulge 202 can massage the edge of the macular hole, so that the inner limiting membrane valve is not punctured, and the effect of surgical treatment is improved.

Specifically, in one embodiment, the base 1 may be a square column or a cylinder, and the cavity 101 is a square inner cavity.

Specifically, in one embodiment, a first limiting seat 11 and a second limiting seat 12 are disposed on an inner wall of the cavity 101; the first limiting seat 11 and the second limiting seat 12 are arranged at intervals along the sliding direction of the needle tube 2, and a positioning seat 13 is fixedly arranged on the side surface of the outer circumference of the needle tube 2; the positioning seat 13 is located between the first limiting seat 11 and the second limiting seat 12. The first limiting seat 11 and the second limiting seat 12 are arranged at intervals from front to back. The first limiting seat 11 and the second limiting seat 12 are both provided with sliding holes for the needle tube 2 to pass through, the positioning seat 13 is installed at the upper end of the circumferential side surface of the needle tube 2, the positioning seat 13 slides between the first limiting seat 11 and the second limiting seat 12, and the first limiting seat 11 and the second limiting seat 12 limit the sliding distance of the needle tube 2 to be too large to be separated from the base 1.

Specifically, in one embodiment, the cartesian needle further comprises a hose 7 and an elastic balloon 8; the elastic air bag 8 is provided with an air cavity 801, one end of the hose 7 is communicated with the first end of the needle tube 2, the other end of the hose 7 is communicated with the air cavity 801, and air and liquid can be exchanged by utilizing negative pressure suction.

Specifically, in one embodiment, a handle 6 is mounted on the adjustment lever 3 to facilitate rotation of the adjustment lever 3.

In particular, in one embodiment, the cartesian needle further comprises a braking plate 9 and a spring 10; adjust pole 3 and slidingtype from top to bottom and install on the pedestal, adjust pole 3 have the third end of being connected with handle 6 and be used for with the fourth end of braking plate 9 butt, adjust the fourth end of pole 3 and be located cavity 101, the up end of braking plate 9 is equipped with and is used for adjusting the inserted spacing groove of pole 3 lower extreme. The spring 10 is clamped between the brake plate 9 and the inner wall of the cavity 101, the brake plate 9 is positioned between the needle tube 2 and the spring 10, and the gear 4 is positioned between the brake plate 9 and the handle 6; the upper end of the spring 10 is connected with the brake plate 9, and the lower end of the spring 10 is fixedly connected with the bottom wall of the cavity 101. The lower end of the adjusting rod 3 is abutted against the upper end face of the brake plate 9. The upper end surface of the stopper plate 9 abuts against the lower end of the outer circumferential side surface of the needle tube 2, and the stopper plate 9 is pressed against the lower end of the outer circumferential side surface of the needle tube 2 by the elastic force of the spring 10 to restrict the sliding of the needle tube 2 by the frictional force.

The brake plate 9 is switched between a braking position and an activated position. Under the action of the elastic force of the spring 10, the brake plate 9 is located at the braking position, the brake plate 9 abuts against the outer circumferential side surface of the needle tube 2, the gear 4 is located above the rack 5 and is separated from the rack 5, at the moment, the rotation adjusting rod 3 idles the gear 4, the brake plate 9 cannot rotate, and the needle tube 2 cannot slide. The adjusting rod 3 is pressed downwards, the braking plate 9 is located at the starting position, the gear 4 moves downwards and is meshed with the rack 5, the braking plate 9 compresses the spring 10 and is far away from the outer circumferential side face of the needle tube 2, the braking plate 9 is separated from the needle tube 2, and the adjusting rod 3 is rotated to enable the needle tube 2 to slide, so that the length of the needle tube 2 is adjusted. When the adjusting rod 3 is not pressed by external force, the needle tube 2 cannot be driven to slide by the rotation of the adjusting rod 3, and the stability of the needle tube 2 is ensured.

Specifically, in one embodiment, the stopper 9 is provided with a circular arc groove 901 matching with the outer circumferential side surface of the syringe 2. The arc groove 901 facilitates the brake plate 9 to abut against the outer circumferential side surface of the needle tube 2, so that accurate positioning is realized.

Specifically, in one embodiment, an anti-slip film 902 is disposed in the arc groove 901, and the anti-slip film 902 increases friction force and enhances the braking effect of the braking plate 9.

Specifically, in one embodiment, the inner wall of the cavity 101 is provided with a sliding groove 102, and the braking plate 9 is slidably mounted in the sliding groove 102. The sliding groove 102 extends from top to bottom, the sliding groove 102 limits the brake plate 9 to only slide up and down, can not slide back and forth, left and right, and can not rotate, and the upper inner wall and the lower inner wall of the sliding groove 102 play a limiting role.

Specifically, in one embodiment, the hose 7 is a transparent tube, and a valve body is mounted on the hose 7. The valve body is not shown. The transparent tube is convenient for observing the gas-liquid exchange process, and the valve body controls the gas-liquid exchange.

Specifically, in one embodiment, the base 1 is provided with anti-slip stripes, which are not shown. When the operator holds the base body with hands to use the flute needle, the anti-skid stripes have an anti-skid effect.

The working principle of the invention is as follows: the handle is pressed to enable the adjusting rod to slide downwards, the adjusting rod is suitable for being meshed with the gear and the rack, then the adjusting rod is rotated to drive the needle tube to slide, and the length of the needle tube located outside the base is adjusted according to needs. The handle is loosened, the adjusting rod is reset under the action of the elastic force of the spring, the gear is separated from the rack, and the brake plate limits the sliding of the needle tube. After the proper length is adjusted, vitreoretinal surgery is carried out, gas-liquid exchange is carried out by utilizing the drainage holes and the air bags in the vitreoretinal surgery, and the bulge is utilized to fix the inner peripheral valve and massage the macular hole edge.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A cartesian needle, characterized by: the device comprises a base with a cavity, a needle tube with a tube hole, an adjusting rod rotationally mounted on the base, and a gear mounted on the adjusting rod and synchronously rotating with the adjusting rod; a rack meshed with the gear is arranged on the side surface of the outer circumference of the needle tube and extends along the axial direction of the needle tube;

2. The cartesian needle as set forth in claim 1, wherein: a first limiting seat and a second limiting seat are arranged on the inner wall of the cavity; the first limiting seat and the second limiting seat are arranged at intervals along the sliding direction of the needle tube, and the side surface of the outer circumference of the needle tube is fixedly provided with a positioning seat; the positioning seat is positioned between the first limiting seat and the second limiting seat.

3. The cartesian needle as set forth in claim 1, wherein: the device also comprises a hose and an elastic air bag; the elastic air bag is provided with an air cavity, one end of the hose is communicated with the first end of the needle tube, and the other end of the hose is communicated with the air cavity.

4. The cartesian needle as set forth in claim 1, wherein: the adjusting rod is provided with a handle.

5. The cartesian needle as set forth in claim 4, wherein: the brake device also comprises a brake plate and a spring; the adjusting rod is slidably mounted on the seat body and provided with a third end connected with the handle and a fourth end used for abutting against the brake plate, the fourth end of the adjusting rod is located in the cavity, the spring is clamped between the brake plate and the inner wall of the cavity, the brake plate is located between the needle tube and the spring, and the gear is located between the brake plate and the handle;

6. A cartesian needle as claimed in claim 5, wherein: the brake plate is provided with an arc groove matched with the outer circumferential side surface of the needle tube.

7. The cartesian needle as set forth in claim 6, wherein: and an anti-skid rubber sheet is arranged in the arc groove.

8. The cartesian needle as set forth in claim 7, wherein: the inner wall of the cavity is provided with a sliding groove, and the brake plate is arranged in the sliding groove in a sliding mode.

9. A cartesian needle as claimed in claim 3 wherein: the hose is a transparent pipe, and a valve body is arranged on the hose.

10. A cartesian needle as claimed in any one of claims 1 to 9 wherein: and the base is provided with anti-skid stripes.