CN219166864U - Pushing device - Google Patents

Abstract

The utility model discloses a push injector which is used for pushing a glaucoma drainage implant into a schlemm tube and comprises a shell, a guide tube, a pushing mechanism and a pushing wire; the guide tube is connected with the shell, the distal end of the guide tube is used for accommodating the glaucoma drainage implant, the push wire is arranged in the guide tube, the distal end of the push wire is abutted with the glaucoma drainage implant, and the proximal end of the push wire is exposed out of the proximal end of the guide tube and is connected with the push mechanism in the shell; the pushing mechanism is at least partially exposed out of the shell and is used for providing pushing force for the pushing wire so that the glaucoma drainage implant can be pushed into the schlemm tube along the guide tube, and the distal end of the guide tube is abutted with the outer part of the schlemm tube in the pushing process of the pushing mechanism. The injector has the advantages of good pushing effect and high accuracy, and is convenient for operators to use.

Description

Pushing device

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a push injector.

Background

In the prior art, a drainage implant is implanted in a schlemm tube (Shi Liman tube) in the eyes of a human body to reconstruct an aqueous outflow channel, so that the intraocular pressure is reduced to achieve the treatment purpose. Implantation of such drainage implants typically requires surgical implantation directly into the annular schlemm's canal from outside the eyeball.

In general, an operator manually implants a drainage implant into a schlemm tube of a human eye through forceps, clamps and other tools, and the drainage implant has the risk of falling off easily due to the tiny volume of the drainage implant; in addition, the drainage implant is implanted by using tools such as forceps, clamps and the like, so that the problems of inaccurate positioning, poor implantation effect, high operation difficulty and the like are also caused;

the operator may also consider implantation of a drainage implant from outside the eye by means of a bolus, whereas in the prior art, a bolus of a drainage implant is typically designed to be implanted from the limbus of the eye into the interior of the eye; for example, patent CN207821996U discloses a glaucoma aqueous humor drainage device, which comprises a push-injection device and a drainage tube, wherein the push-injection device comprises a push-injector and a push-injection tube, the front end of the push-injection tube is of a straight tube design, the curvature of the push-injection tube cannot be matched with that of an annular schlemm tube, and the drainage tube cannot be pushed into the schlemm tube accurately, so that the implantation accuracy is low and the implantation effect is poor; in addition, the tip of the injection tube is a sharp tip, and when the schlemm tube is directly implanted from outside the eyeball, the schlemm tube tissue is easily damaged. Thus, such injector products cannot be used for implantation of drainage implants from outside the eye.

Disclosure of Invention

The utility model provides a push injector, which solves the problems of inaccurate positioning and poor implantation effect of a glaucoma drainage implant implantation mode in the prior art.

In order to solve the technical problems, the technical scheme adopted by the utility model is to provide a push injector which is used for pushing a glaucoma drainage implant into a schlemm tube and comprises a shell, a guide tube, a pushing mechanism and a pushing wire; the guide tube is connected with the shell, the distal end of the guide tube is used for accommodating the glaucoma drainage implant, the push wire is arranged in the guide tube, the distal end of the push wire is abutted with the glaucoma drainage implant, and the proximal end of the push wire is exposed out of the proximal end of the guide tube and is connected with the pushing mechanism in the shell; the pushing mechanism is at least partially exposed out of the shell and is used for providing pushing force for the pushing wire so that the glaucoma drainage implant can be pushed into the schlemm tube along the guide tube, and in the pushing process of the pushing mechanism, the distal end of the guide tube is abutted with the outer part of the schlemm tube.

Preferably, the pushing mechanism comprises a fixing frame, a main gear, an intermediate gear and a pushing rack, wherein the main gear, the intermediate gear and the pushing rack are arranged on the fixing frame;

the main gear is at least partially exposed out of the shell to form a knob, the main gear is in transmission connection with the pushing rack through the intermediate gear, and the front end of the pushing rack is connected with a fixing block for fixing the pushing wire.

Preferably, the guide tube includes a curved guide tube at a distal end and a straight guide tube connected to the curved guide tube.

Preferably, the curved guide tube includes a first curved guide tube and a second curved guide tube, and the second curved guide tube is connected to the straight guide tube.

Preferably, an anti-triggering mechanism is arranged on the side face of the shell, and the anti-triggering mechanism is used for limiting the pushing rack to move.

Preferably, the trigger preventing mechanism is a limiting bolt, and the limiting bolt penetrates through the shell and the pushing rack.

Preferably, a guide tube protecting sleeve is arranged at the front end of the shell, the guide tube penetrates through the guide tube protecting sleeve, and the tail part of the guide tube protecting sleeve is arranged in the shell.

Preferably, a guide tube fixing sleeve is arranged in the guide tube protecting sleeve, the proximal end of the guide tube penetrates through the guide tube fixing sleeve, and the outer wall of the guide tube is fixedly connected with the guide tube fixing sleeve.

Preferably, the head of the shell is sleeved with a plurality of anti-slip rubber rings.

Preferably, the housing comprises a first housing and a second housing which are detachably connected.

The beneficial effects of the utility model are as follows: the utility model discloses a push injector which is used for pushing a glaucoma drainage implant into a schlemm tube and comprises a shell, a guide tube, a pushing mechanism and a pushing wire; the guide tube is connected with the shell, the distal end of the guide tube is used for accommodating the glaucoma drainage implant, the push wire is arranged in the guide tube, the distal end of the push wire is abutted with the glaucoma drainage implant, and the proximal end of the push wire is exposed out of the proximal end of the guide tube and is connected with the push mechanism in the shell; the pushing mechanism is at least partially exposed out of the shell and is used for providing pushing force for the pushing wire so that the glaucoma drainage implant can be pushed into the schlemm tube along the guide tube, and the distal end of the guide tube is abutted with the outer part of the schlemm tube in the pushing process of the pushing mechanism. The injector has the advantages of good pushing effect and high accuracy, and is convenient for operators to use.

Drawings

FIG. 1 is a schematic illustration of the use of a bolus according to the present utility model;

FIG. 2 is a schematic illustration of an abutment process of a guide tube with a schlemm's canal of a human eye in a syringe according to the present utility model;

FIG. 3 is an overall schematic of a bolus according to the present utility model;

FIG. 4 is an exploded schematic view of a syringe according to the present utility model;

FIG. 5 is a schematic view of a first embodiment of a guide tube in a syringe according to the present utility model;

FIG. 6 is an overall schematic of a second embodiment of a guide tube in a bolus according to the utility model;

FIG. 7 is an exploded view of a second embodiment of a guide tube in a syringe according to the present utility model;

FIG. 8 is an overall schematic of a pushing mechanism in a bolus according to the present utility model;

FIG. 9 is an exploded view of a pushing mechanism in a syringe according to the present utility model;

FIG. 10 is a schematic view of a catheter sheath and a catheter retaining sleeve in an injector according to the present utility model;

fig. 11 is a schematic view of a second housing in a bolus according to the present utility model.

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Preferred embodiments of the present utility model are shown in the drawings. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 and 2, the injector is used to push the glaucoma drainage implant 5 into the schlemm's canal, the glaucoma drainage implant 5 being capable of reestablishing the aqueous outflow channel, thereby lowering the intraocular pressure for therapeutic purposes.

Prior to the bolus injection of the glaucoma drainage implant 5, a surgical incision is first made in the schlemm's canal, thus creating two orifices in the schlemm's canal. Then the distal end of the guide tube 2 of the injector is abutted against the outer part of the schlemm tube, namely, the distal end of the guide tube 2 is kept coaxial and level with the tube orifice of the schlemm tube but does not enter the schlemm tube; thereby facilitating the smooth introduction of the glaucoma drainage implant 5 into the schlemm's canal; a glaucoma drainage implant 5 may be implanted on each side of the surgical incision. This method is applicable not only to open angle glaucoma surgery but also to closed angle glaucoma surgery.

It can be seen that the injector is externally implanted, the guide tube 2 of the injector does not enter the schlemm tube of the human eye, the operation process is simple, the operation is convenient, the operation time is short, and the eye pain of the patient is reduced. The existing injector is implanted by an inner way, a guide tube of the injector can enter a schlemm tube of a human eye, the operation process is complex, the difficulty is high, and a patient can cause great pain to the eye in the operation process.

In this application, distal refers to the end that is closer to the eyeball and proximal refers to the end that is closer to the operator's hand.

Further, fig. 3 to 7 are combined. The injector comprises a shell 1, a guide tube 2, a pushing mechanism 3 and a pushing wire 4. Wherein, the guide tube 2 is connected with the casing 1, and its distal end is used for holding glaucoma drainage implant 5, pushes away the silk 4 setting in the inside of guide tube 2, pushes away the distal end of silk 4 and the glaucoma drainage implant 5 butt, and the distal end that pushes away the silk 4 can promote glaucoma drainage implant 5 to expose guide tube 2 to get into the schlemm intraductal of human eye. The proximal end of the pushing wire 4 exposes out of the proximal end of the guide tube 2 and is connected with a pushing mechanism 3 inside the shell 1, and the pushing mechanism 3 provides pushing force for the pushing wire 4, so that the pushing wire can push the glaucoma drainage implant 5 to expose out of the guide tube 2 and can return to an initial position after pushing is completed.

In fig. 3, the pushing mechanism 3 is at least partially exposed to the housing 1 for providing a pushing force to the push wire 4 to push the glaucoma drainage implant 5 along the guide tube into the schlemm's canal. During pushing by the pushing mechanism 3, the distal end of the guide tube 2 abuts against the outside of the schlemm tube.

Because the glaucoma drainage implant 5 is in abutting contact with the distal end of the push wire 4, the distal end of the push wire 4 can only push the glaucoma drainage implant 5 to expose the guide tube 2, and unidirectional pushing is completed; but can not drive the glaucoma drainage implant 5 to return to the guide tube 2 again, and when the push wire 4 returns to the inside of the shell 1, the glaucoma drainage implant 5 is in a static state and does not move.

Further, as an example of the guide tube 2. In fig. 5, the guide tube 2 includes a curved guide tube 21 at a distal end and a straight guide tube 22 connecting the curved guide tube 21. The curved guide tube 21 is matched with the glaucoma drainage implant 5 and schlemm tube of the human eye, thereby facilitating the pushing out of the glaucoma drainage implant 5, and the linear guide tube 22 is connected with the housing 1.

Further, as another embodiment of the guide tube 2. In fig. 6 and 7, the curved guide tube 21 includes a first curved guide tube 211 and a second curved guide tube 212, and the second curved guide tube 212 is connected to the straight guide tube 22. It can be seen that in fig. 7, the glaucoma drainage implant 5 has two, housed within the first curved guide tube 211, the glaucoma drainage implant 5 abutting the distal end of the push wire 4; the push wire 4 is partially contained in the guide tube 2, and the whole shape of the push wire 4 is consistent with that of the guide tube 2, so that the push is convenient.

Further, the guide tube 2 has excellent biocompatibility, and the material thereof may be stainless steel such as 2Cr13, 1Cr18Ni9, SUS304 (L), SUS316 (L), SUS430, etc.; titanium alloys, such as TC4, etc.; can also be pure titanium, tungsten steel, platinum iridium alloy, high polymer material and modified engineering plastic.

Further, the Schlemm tube diameter measurement result of human eyes is 0.39mm to 0.63mm, and the average value is (0.50.+ -. 0.07) mm. The shape, dimensions and size of the glaucoma drainage implant 5 are tailored to the Schlemm's canal of the human eye, the diameter of the guide tube 2 being matched to the glaucoma drainage implant 5.

In the present application, the glaucoma drainage implant 5 has a diameter ranging from 0.1mm to 0.5mm and the glaucoma drainage implant 5 has a length ranging from 1mm to 5mm; the range of curvature of glaucoma drainage implant 5: r4 mm-R10 mm.

Correspondingly, the diameter of the inner wall of the guide tube 2 ranges from 0.1mm to 0.5mm, and the diameter of the outer wall of the guide tube 2 ranges from 0.1mm to 1mm.

Further, the curvature of the curved guide tube 21 matches the curvature of the schlemm's tube, facilitating the introduction of the glaucoma drainage implant 5 into the schlemm's tube at a more comfortable angle by the operator's hand.

In fig. 5, the curvature range of the curved guide tube 21: r4mm to R10mm, in fig. 6, the curvature range of the first curved guide tube 211: r4mm to R10mm, the curvature range of the second curved guide tube 212: r3 mm-R8 mm.

Further, referring to fig. 8 and 9, the pushing mechanism 3 includes a fixed frame 31, and a main gear 32, an intermediate gear 33, and a pushing rack 34 mounted on the fixed frame 31. A first fixing lever 301 and a second fixing lever 302 are provided on the fixing frame 31, the main gear 32 can rotate around the first fixing lever 301, and the intermediate gear 33 can rotate around the second fixing lever 302. The push rack 34 is engaged with the intermediate gear 33 and moves forward and backward along the fixing frame 31.

The main gear 32 is at least partially exposed to the housing 1 to form a knob, the main gear 32 being capable of pushing the glaucoma drainage implant 5 forward in the guide tube 2, and the main gear 32 being in a stationary state when the main gear 32 is retracted.

The knob portion of the main gear 32 exposed to the housing 1 may be provided with protrusions or recesses to allow the operator to feel the push distance of the glaucoma drainage implant 5 during pushing. The protrusions or depressions are regularly distributed, and the stroke sense of touch of the main gear 32 can be effectively fed back; the knob part can also be wrapped with silica gel.

The main gear 32 is in transmission connection with the pushing rack 34 through the intermediate gear 33, and the front end of the pushing rack 34 is connected with a fixing block 35 for fixing the pushing wire 4.

The proximal end of the pushing wire 4 passes through the fixed block 35 and then bends downwards, and is finally fixedly connected with the fixed block 35, the fixed block 35 is connected with the front end of the pushing rack 34 in an inserting mode, and an inserting column 351 is arranged on the side surface of the fixed block 35, which is close to the front end of the pushing rack 34.

The pushing mechanism 3 has the following working principle: after the main gear 32 is shifted, the intermediate gear 33 rotates to drive the pushing rack 34 to move forwards and backwards, and the fixed block 35 synchronously moves forwards and backwards to drive the pushing wire 4 to move forwards and backwards in the guide tube 2 (the guide tube 2 is kept stationary); when the push wire 4 is moved outwards, the glaucoma drainage implant 5 can be pushed out of the guide tube 2.

Further, the transmission ratio of the main gear 32 to the intermediate gear 33 is 0.2 to 5. The gear ratio of the main gear 32 and the intermediate gear 33 is preferably greater than 1, i.e. the main gear 32 rotates faster than the intermediate gear 33, so that it is a deceleration in order to ensure that the glaucoma drainage implant 5 is slowly moved from the guide tube 2 into the schlemm's canal during surgery by the operator, while avoiding a part of the risk of surgery due to mishandling.

Further, the material of the fixing frame 31 may be ABS, POM, PEEK, PVC, PET, nylon, polymer material, modified engineering plastic, zinc alloy, aluminum alloy, magnesium aluminum alloy, stainless steel, copper, iron, etc.

Further, the diameter of the push wire 4 is 0.1mm to 0.5mm, and the push wire can be made of SUS300 series/SUS 400 series stainless steel materials.

Further, an anti-triggering mechanism is arranged on the side face of the shell 1 and used for limiting the movement of the pushing rack 34, so that the phenomenon that the injector is invalid due to triggering caused by no action before the injector is used formally is prevented, after the structure is removed, the injector is indicated to be used and cannot be recovered, and an operator is given a prompt.

Preferably, in fig. 9, the anti-triggering mechanism is a limit latch 6, and the limit latch 6 penetrates the housing 1 and the push rack 34. One end of the limiting bolt 6 is provided with a pinching plate 61, and the pinching plate 61 is convenient for the limiting bolt 6 to be pulled out. Of course, the trigger prevention mechanism may be a round bar, a square bar, a wire or string, or the like.

Further, referring to fig. 10 and 11, the front end of the housing 1 is provided with a guide tube protector 7, the guide tube 2 penetrates the guide tube protector 7, and the tail 72 of the guide tube protector 7 is mounted in the housing 1.

The head 71 of the guide tube protecting sleeve 7 is tapered, and colloid fixation can be adopted between the tip of the head 71 of the guide tube protecting sleeve 7 and the guide tube 2 to prevent the guide tube 2 from shaking. The tail 72 of the guide tube protecting sleeve 7 is cylindrical, and a limit clamping block 73 is arranged on the tail 72 of the guide tube protecting sleeve 7.

Referring to fig. 4 and 11, the housing 1 includes a first housing 101 and a second housing 102 that are detachably connected, and the detachable connection includes fastening, clamping, screwing, and the like.

In fig. 11, the front end of the second housing 102 is provided with a mounting table 105, the mounting table 105 is provided with a mounting groove 106 for placing the tail 72 of the guide tube protecting sleeve 7, and the groove wall of the mounting groove 106 is correspondingly provided with a limit groove 107 adapted to the limit clamping block 73; similarly, the first housing 101 is provided with a mounting base 105, a mounting groove 106, and a limit groove 107.

Further, the guide tube protecting sleeve 7 is internally provided with a guide tube fixing sleeve 8, the proximal end of the guide tube 2 penetrates through the guide tube fixing sleeve 8, the outer wall of the guide tube 2 is fixedly connected with the guide tube fixing sleeve 8, and the fixing connection can be fixed by adopting colloid. Specifically, the head 81 of the guide tube fixing sleeve 8 is inserted into the tail 72 of the guide tube protecting sleeve 7, and the fixation of the head 81 of the guide tube fixing sleeve 8 and the tail 72 of the guide tube protecting sleeve 7 is realized through colloid; the tail 82 of the guide tube fixing sleeve 8 is engaged with the side wall of the mounting table 105.

Further, the head of the housing 1 is sleeved with a plurality of anti-slip rubber rings 104, and rubber ring grooves 103 for accommodating the anti-slip rubber rings 104 are further formed in the first housing 101 and the second housing 102. The anti-slip rubber ring 104 is convenient for an operator to grasp and stimulate the sense of the operator, and also plays a role in improving the appearance.

Further, the second housing 102 has a flat bottom 104 inside, and the flat bottom 104 is used for fixing the fixing frame 31 of the pushing mechanism 3, and the fixing frame 31 may be glued or ultrasonically welded to the flat bottom 104.

Further, a plurality of reinforcing ribs 108 are provided inside the second housing 102, and the reinforcing ribs 108 serve to increase the strength of the housing and prevent easy damage.

Further, an indication mark 9 is provided on the first housing 101 near the main gear 32 to indicate the pushing direction. The indication mark 9 may be a bump, a recess, a silk screen or a sticker.

Furthermore, the shape of the shell 1 is big at the middle and small at the two ends, or big at the middle and small or straight rod type, which is suitable for single-hand operation. The diameter range of the shell 1 is 5 mm-20 mm, and the length range is 5 cm-20 cm.

Further, the material of the housing 1 may be ABS, POM, PEEK, PVC, PET, nylon, polymer material, modified engineering plastic, zinc alloy, aluminum alloy, magnesium aluminum alloy, stainless steel, copper, iron, etc.

Further, the sterilization modes of the injector can be as follows: gas sterilization (ethylene oxide, formaldehyde, ozone), radiation sterilization (microwaves, ultraviolet (UV), X-rays, gamma rays, etc.).

It can be seen that the present utility model discloses a push injector for pushing a glaucoma drainage implant into a schlemm's canal, comprising a housing, a guide tube, a pushing mechanism, a pushing wire; the guide tube is connected with the shell, the distal end of the guide tube is used for accommodating the glaucoma drainage implant, the push wire is arranged in the guide tube, the distal end of the push wire is abutted with the glaucoma drainage implant, and the proximal end of the push wire is exposed out of the proximal end of the guide tube and is connected with the push mechanism in the shell; the pushing mechanism is at least partially exposed out of the shell and is used for providing pushing force for the pushing wire so that the glaucoma drainage implant can be pushed into the schlemm tube along the guide tube, and the distal end of the guide tube is abutted with the outer part of the schlemm tube in the pushing process of the pushing mechanism. The injector has the advantages of good pushing effect and high accuracy, and is convenient for operators to use.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the present utility model and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present utility model.

Claims (10)

1. A pusher for pushing a glaucoma drainage implant into a Shi Liman canal, characterized by: comprises a shell, a guide tube, a pushing mechanism and a pushing wire; the guide tube is connected with the shell, the distal end of the guide tube is used for accommodating the glaucoma drainage implant, the push wire is arranged in the guide tube, the distal end of the push wire is abutted with the glaucoma drainage implant, and the proximal end of the push wire is exposed out of the proximal end of the guide tube and is connected with the pushing mechanism in the shell; the pushing mechanism is at least partially exposed out of the shell and is used for providing pushing force for the pushing wire so that the glaucoma drainage implant can be pushed into the Shi Liman tube along the guide tube, and in the pushing process of the pushing mechanism, the distal end of the guide tube is abutted to the outer part of the Shi Liman tube.

2. The injector of claim 1, wherein: the pushing mechanism comprises a fixing frame, a main gear, an intermediate gear and a pushing rack, wherein the main gear, the intermediate gear and the pushing rack are arranged on the fixing frame; the main gear is at least partially exposed out of the shell to form a knob, the main gear is in transmission connection with the pushing rack through the intermediate gear, and the front end of the pushing rack is connected with a fixing block for fixing the pushing wire.

3. The injector of claim 2, wherein: the guide tube comprises a bending guide tube at the far end and a straight guide tube connected with the bending guide tube.

4. A bolus according to claim 3, wherein: the curved guide tube comprises a first curved guide tube and a second curved guide tube, and the second curved guide tube is connected with the straight guide tube.

5. The injector of claim 4, wherein: the side of casing is provided with prevents trigger mechanism, prevent trigger mechanism is used for restricting push rack removes.

6. The injector of claim 5, wherein: the trigger preventing mechanism is a limiting bolt, and the limiting bolt penetrates through the shell and the pushing rack.

7. The bolus according to any one of claims 1 to 6, wherein: the front end of the shell is provided with a guide tube protecting sleeve, the guide tube penetrates through the guide tube protecting sleeve, and the tail of the guide tube protecting sleeve is installed in the shell.

8. The injector of claim 7, wherein: the inside of stand pipe protective sheath is provided with stand pipe fixed cover, the proximal end of stand pipe runs through stand pipe fixed cover, and the outer wall of stand pipe with stand pipe fixed cover fixed connection.

9. The bolus according to any one of claims 1 to 6, wherein: the head of the shell is sleeved with a plurality of anti-slip rubber rings.

10. The bolus according to any one of claims 1 to 6, wherein: the housing includes a first housing and a second housing that are detachably connected.

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