CN220824295U - Glaucoma catheter implantation system - Google Patents

Abstract

The utility model discloses a glaucoma catheter implantation system which is characterized by comprising a shell and an implantation channel, wherein a safety mechanism and a transmission mechanism are arranged in the shell; one end of the implantation channel is connected with the front end of the shell and is used for providing a cavity for the drainage catheter; the transmission mechanism is respectively connected with the implantation channel and the safety mechanism and is used for pushing out the drainage catheter through the implantation channel and implanting the drainage catheter into the operation position; the safety mechanism is used for controlling the operation of the transmission mechanism. The utility model solves the problem that the operation of the implantation system in the prior art is inconvenient, thereby possibly causing the extension of the operation time; meanwhile, the device has the performances of preventing the false excitation of the product, accurately positioning the drainage catheter, adjusting the angle of the inner tube, preventing the damage of eye tissues when the implantation system is withdrawn, and the like.

Description

Glaucoma catheter implantation system

Technical Field

The utility model belongs to the field of medical instruments, and relates to a glaucoma catheter implantation system.

Background

The interior of the human eye is filled with aqueous humor, normal dynamic flow of aqueous humor between eye tissues is an important indicator of eye health, and deviations from normal aqueous humor flow can lead to various eye diseases. The direct cause of glaucoma is usually a pathological change caused by an increase in intraocular pressure due to an obstruction in the aqueous circulation pathway, but some patients also present with normal tension glaucoma. In the prior art, a drainage implant is generally implanted in human eyes to improve an aqueous outflow channel, so that intraocular pressure is reduced to achieve the purpose of treatment.

The glaucoma catheter implantation system generally comprises a drainage catheter, an implantation system and a plug, wherein the drainage catheter is pre-buried in an implantation channel (namely an inner cavity of a needle tube) of the implantation system and finally implanted into an operation part, and an aqueous humor outflow channel is improved, so that the intraocular pressure is reduced to achieve the treatment purpose. Implantation systems typically consist of a transmission, implantation tunnel, safety, etc. Wherein, the transmission mechanism is used for conveying the drainage catheter to the operation position; the implantation channel provides a cavity for the drainage catheter; the safety is designed to prevent the product from being excited by mistake during the transportation and operation. The plug is placed at the tip of the implantation channel to plug the drainage catheter and prevent the drainage catheter from falling off the implantation channel in the transferring process.

The transmission mechanism in the prior art realizes the conveying function by pushing the push button, and the push button is large and has long pushing stroke, so the operation is inconvenient, and particularly, the large push button can be abutted against certain parts of the holding hand in the pushing process, so that the holding gesture has to be adjusted, and then the pushing operation is continued.

Prior art safety and implant systems are separate and require pulling in a direction perpendicular to the axis of the implant system prior to surgery, which is inconvenient to perform with one hand.

Disclosure of utility model

The application provides a glaucoma catheter implantation system, which aims to solve the problem that the implantation system in the prior art is inconvenient to operate, so that the operation time is possibly prolonged.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows:

The glaucoma catheter implantation system is characterized by comprising a shell and an implantation channel, wherein a safety mechanism and a transmission mechanism are arranged in the shell;

one end of the implantation channel is connected with the front end of the shell and is used for providing a cavity for the drainage catheter;

The transmission mechanism is respectively connected with the implantation channel and the safety mechanism and is used for pushing out the drainage catheter through the implantation channel and implanting the drainage catheter into the operation position;

the safety mechanism is used for controlling the operation of the transmission mechanism.

Further, the implantation channel comprises an outer tube 5, an outer tube seat 6, an inner tube 7 and an inner tube seat 8; the outer tube seat 6 and the inner tube seat 8 are both fixed in the shell, one end of the outer tube 5 is connected with the outer tube seat 6, and one end of the inner tube 7 is connected with the front end of the inner tube seat 8 through the outer tube 5 and the outer tube seat 6.

Further, the inner tube seat 8 is located at a central axis position in the shell and can rotate along the axial direction; the inner tube seat 8 is connected with the transmission mechanism, and the transmission mechanism controls the inner tube seat 8 to move back and forth along the central axis, so that the drainage catheter is pushed out and implanted into the operation site.

Further, the inner tube seat 8 is provided with a second protrusion 803, and the housing is provided with a special-shaped groove 106; by controlling the second protrusion 803 to rotate in the profiled groove 106, the inner tube holder 8 is controlled to rotate in the axial direction.

Further, the transmission mechanism comprises a gear 4, an inner tube push rod 10, an inner core 13 and an inner core push rod 9; the gear 4 is connected with the inner pipe push rod 10 and the inner core push rod 9 and is used for driving the inner pipe push rod 10 and the inner core push rod 9 to stretch; the inner pipe push rod 10 is connected with the inner pipe seat 8 and used for controlling the inner pipe seat 8 to move back and forth along the central axis; the inner core push rod 9 is connected with the inner core 13, the inner core 13 is used for extending into the inner tube 7 through the inner tube seat 8 and contacting with the drainage catheter, and the inner core push rod 9 is used for controlling the drainage catheter to be pushed out and implanted into the operation site by driving the inner core 13.

Further, a first guide rail 401 and a second guide rail 402 are arranged on the gear 4, and the gear 4 comprises a toothed part and a toothless part; the front end of the inner tube push rod 10 is connected with the inner tube seat 8, and a rack 1002 is arranged at the rear end of the inner tube push rod 10 and is used for being matched with the teeth 403 of the toothed part; the first guide rail 401 is used for limiting the position of the inner core push rod 9, and the second guide rail 402 and the teeth 403 are used for limiting the position of the inner core push rod 10; a first clamping point 901 and a second clamping point 902 are arranged on the inner core push rod 9, the first clamping point 901 and the second clamping point 902 respectively run in the first guide rail 401, and the clamping point 1001 of the inner core push rod 10 runs in the second guide rail 402; when the gear 4 is rotated, the rotational motion of the gear 4 is converted into linear motion of the inner core push rod 9 and the inner pipe push rod 10; when the gear 4 is rotated in the forward direction to drive the first clamping point 901 and the second clamping point 902 of the inner core pushing rod 9 to move on the first guide rail 401, the toothless part corresponds to the inner core pushing rod 10, so that the inner core pushing rod 10 is kept motionless and the inner core pushing rod 9 is driven to move forwards; when rotated by a certain angle, the teeth 403 are in contact with the racks 1002 on the inner tube push rod 10, so that the inner tube push rod 10 is driven to move backwards and the inner tube push rod 9 is not moved any more; when the gear 4 is reversely rotated, the teeth 403 contact the rack 1002, driving the inner push rod 10 to move forward and the inner push rod 9 not to move; when the teeth 403 are disengaged from the racks 1002, the inner push rod 10 is no longer moved and the inner push rod 9 is driven forward until it returns to its original position.

Further, the shell consists of an upper shell 1 and a lower shell 2, and the upper shell 1 is provided with a groove 102 for positioning; the safety mechanism comprises a safety 3, wherein a claw 301 and a strip-shaped structure 303 are arranged on the safety 3, the claw 301 is used for being clamped into the groove 102 to form a clamping structure, and the claw 301 can move in the groove 102 along the axial direction of the implantation system; the elongated structure 303 is used to lock or unlock the rotation of the gear 4.

Further, the groove 102 is provided with a first groove 103 and a second groove 104 for fixing the claw 301, the first groove 103 and the second groove 104 are circular grooves, and the claw 301 is provided with a circular protrusion 302 matched with the first groove 103 and the second groove 104; when the protrusion 302 is fixed in the second recess 104 at the proximal end of the groove 102, the elongated structure 303 is abutted between two teeth of the gear 4, thereby restricting the rotation of the gear 4; when the projection 302 is secured to the first recess 103 at the distal end of the slot 102, the elongated structure 303 moves out of the gap between the two teeth of the gear 4, allowing the gear 4 to rotate.

Further, the device also comprises a protection mechanism, wherein the protection mechanism comprises a plug 11 and a protection sleeve 12, the plug 11 is in interference fit with the front end of the inner tube 7 through a shaft hole, and the protection sleeve 12 is in interference fit with the outer tube seat 6 through the shaft hole.

Further, an anti-slip structure 101 is arranged on the outer surface of the front end of the shell; the anti-slip structure 101 is a stripe structure with concave-convex intervals.

The implantation system is used for implanting the glaucoma drainage catheter into the operation part, and comprises a shell formed by assembling an upper shell and a lower shell, wherein a holding part, a safety mechanism, an implantation channel, a transmission mechanism and a protection mechanism are arranged on the shell;

Wherein, the front end surface of the holding part is provided with an anti-skid structure;

the safety mechanism comprises a safety and an upper shell. The safety device is characterized in that the safety device is provided with a claw structure, the upper shell is provided with a positioning structure, and the claw structure and the positioning structure form a clamping structure together, so that the safety device and the upper shell can be assembled together to form a safety mechanism;

Wherein the positioning structure of the upper shell consists of a plurality of separated grooves, and the safety claw can slide in the grooves;

Wherein, the groove of the upper shell is provided with a positioning structure, which can fix the insurance;

the implantation channel comprises an outer tube, an outer tube seat, an inner tube and an inner tube seat;

Wherein, the outer tube is connected with the outer tube seat and is fixed between the upper shell and the lower shell through the outer tube seat;

The inner tube is connected with the inner tube seat and is fixed in the central channel of the shell through the inner tube seat;

The outer diameter of the inner tube seat is close to the inner diameter of the central channels of the upper shell and the lower shell and is in clearance fit, so that the inner tube seat is restrained at the central shaft position of the upper shell and the lower shell, and the inner tube seat can rotate along the axial direction due to the clearance fit;

The inner tube seat is connected with the inner tube push rod through a buckle structure and can move along the central axis of the upper shell and the lower shell along with the inner tube push rod;

Wherein, the implantation channel can have another variation, and the component still comprises an outer tube, an outer tube seat, an inner tube and an inner tube seat. Wherein the outer tube is not straight but has a bending angle, such as any angle between 3 and 30 degrees. The outer tube is rigid, the angle of the outer tube can be adjusted by rotating the outer tube seat, so that the tip of the outer tube can prop up eye tissues of an operation part, and the inner tube and the inner core are flexible and can be changed along with the change of the outer tube, thereby facilitating the implantation of the drainage catheter.

The transmission mechanism comprises a gear, an inner tube push rod, an inner core and an inner core push rod;

The gear is provided with two guide rails, the first guide rail can limit the movement of the inner core push rod, and the second guide rail can limit the movement of the inner core push rod;

Wherein, the first guide rail and the second guide rail have certain relative relation in size, which can lead the movement of the inner core push rod and the inner pipe push rod to have certain relative relation, and the movement relation is necessary for realizing the implantation of the drainage catheter;

wherein the gear teeth of the gear are not all the whole circle, the positions and the number of the gear teeth are related to the positions of the first guide rail and the second guide rail, and the relationship is necessary for realizing the mutual relationship between the movement of the inner core push rod and the movement of the inner pipe push rod;

Wherein the position of the first guide rail on the gear is within a certain range, and the range can ensure that the resistance when the gear is rotated is not so large;

The gear teeth of the gear are matched with the teeth of the rack on the inner tube push rod, and the rotating gear can move the inner tube push rod so as to convert the rotating motion into linear motion;

The outer diameter of the inner core push rod is close to the inner diameter of the upper shell limit structure and the inner diameter of the inner pipe push rod limit structure and is in clearance fit, so that the inner core push rod can linearly move along the central axis of the implantation system;

The outer diameter of the inner tube push rod is close to the inner diameter of the upper shell limit structure and is in clearance fit, so that the inner tube push rod can linearly move along the central axis of the implantation system;

the limiting structure of the lower shell can limit the distance of the inner tube push rod in linear motion along the central axis of the implantation system;

The inner core and the inner core push rod are fixed together and can move along with the inner core push rod, and the inner pipe seat and the inner pipe push rod are fixed together and can move along with the inner pipe push rod;

Wherein, the upper and lower shells are provided with a positioning column and a positioning hole for fixing the relative positions of the upper and lower shells;

The protection mechanism comprises a plug and a protection sleeve, wherein the plug is in interference fit with the tip of the inner tube, and the protection sleeve is in interference fit with the outer tube seat;

The protective sleeve is assembled to the outer tube seat, and meanwhile contacts with the plug, and the plug is limited to move in the axial direction of the upper shell and the lower shell, so that the plug is prevented from falling off in the transportation process, and the drainage catheter is prevented from falling out of the implantation channel.

The key points of the utility model include:

1. Realize drainage pipe propelling movement function, convenient, one-step operation's drive mechanism. The transmission mechanism comprises a gear, an inner core push rod and an inner pipe push rod, wherein the inner pipe push rod is provided with a rack structure, the gear is provided with a first guide rail and a second guide rail, the first guide rail of the gear can limit the position of the inner core push rod, the second guide rail and teeth of the gear can limit the position of the inner pipe push rod, the rotary motion of the gear can be converted into linear motion with a certain mutual relationship of the inner core push rod and the inner pipe push rod, the inner core and the inner core push rod are fixed together and can move along with the inner core push rod, an inner pipe seat 8 is connected with the inner pipe push rod 10, and the inner pipe seat 8 is controlled to move to drive the inner pipe 7. The inner tube 7 moves backwards, thus retracting into the outer tube 5, which exposes the drainage catheter 14 more, facilitating the removal of the drainage catheter 14 from the implantation channel; the forward movement of the inner tube 7 is a return action, which of course cannot return the drainage catheter, since the drainage catheter is not connected to other components, but is in contact with the inner core 13, the inner core 13 can only be advanced forward against the drainage catheter, and the drainage catheter cannot be pulled backward.

2. A safety mechanism which is assembled with the implantation system into a whole and can realize one-hand unlocking/locking along the axial direction of the implantation system. The safety device has a claw structure, the upper housing has a positioning structure, the claw structure has a convex structure which is used for fixing and is preferably cylindrical, and the positioning structure has a groove structure which is used for fixing and is preferably cylindrical. The clamping jaw structure of the safety and the positioning structure of the upper shell are assembled into a clamping structure, so that the safety can move on the upper shell and the position is fixed through the cooperation of the protrusion and the groove structure, and the unlocking/locking function is realized.

3. And a structure for preventing the needle tip from retreating and preventing the false excitation of the product. In the unlocked state of the safety, the needle tip does not retract when an axial force, such as a penetration resistance, is applied to the needle tip. The structure includes gear, inner tube push rod, the gear has the second guide rail, the inner tube push rod has the stuck point structure, under the condition that does not manually rotate the gear, the axial displacement of inner tube push rod stuck point can be restricted to the second track of gear, and then the purpose that prevents the product mistake and arouses is realized.

4. Realize the limit structure of accurate location. The lower shell is provided with a positioning structure which can limit the linear movement distance of the push rod of the inner pipe.

The utility model has the following advantages:

1. Compared with the prior art, the drainage catheter pushing device is realized by pushing the push button by rotating the gear of the transmission mechanism. The gear rotation stroke is less than the movable area covered by the pushing stroke of the push button, so that the operation is more convenient; in addition, the push button in the prior art is large, and can possibly collide with certain parts of the holding hand in the pushing process, so that the holding state can be changed, and then the pushing is continued, so that the operation time can be prolonged.

2. Compared with the prior art, the safety device is assembled with the implantation system into a whole, and is parallel to the axial direction of the implantation system for unlocking, so that one-hand operation is facilitated. Prior art safety and implant systems are separate and require pulling in a direction perpendicular to the axis of the implant system prior to surgery, which is inconvenient to perform with one hand.

3. Besides the improvement compared with the prior art, the utility model has the performances of preventing the false excitation of the product, accurately positioning the drainage catheter, adjusting the angle of the inner tube, preventing the damage of eye tissues when the implantation system is withdrawn, and the like.

Drawings

Fig. 1 is a schematic perspective view of an implant system.

Fig. 2 is a schematic perspective view of the safety and upper housing parts.

Fig. 3 is a cross-sectional view of the safety, upper housing, and gear assembly.

Fig. 4 is a schematic perspective view of the outer tube and the outer tube seat after assembly, and a schematic perspective view of the clamping grooves of the upper shell and the lower shell.

Fig. 5 is a schematic perspective view of the inner tube, the inner tube seat, and a partially enlarged schematic view of the tip of the inner tube after assembly.

Fig. 6 is a partial cross-sectional view of the outer tube, outer tube holder, inner tube holder, upper shell, and lower shell after assembly.

Fig. 7 is a schematic perspective view of the gear, the inner core push rod, the inner tube push rod and the inner tube seat after assembly.

Fig. 8 is a schematic perspective view of the inner core putter, the inner core, and the inner core putter assembly.

Fig. 9 is a schematic perspective view of the inner tube push rod and the inner tube seat after assembly.

Fig. 10 is a partial cross-sectional view of a plug, protective sheath, outer tube, inner tube, outer tube socket, upper shell, lower shell, and a partial enlarged view of the protective sheath, plug, inner core, inner tube, outer tube, drainage catheter.

Fig. 11 is a partial cross-sectional view of the outer tube, outer tube holder, standard needle (including inner tube, inner tube holder), upper shell, lower shell after assembly.

Fig. 12 is a schematic perspective view of a standard needle.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings, which are given by way of illustration only and are not intended to limit the scope of the utility model.

Example 1:

As shown in fig. 1, a schematic perspective view of the present utility model is shown, in which the surfaces of the proximal gripping portions of the upper and lower shells 1 and 2 are provided with anti-slip structures 101, preferably, the anti-slip structures 101 are stripe-shaped with concave-convex intervals, and the anti-slip structures 101 may be in other shapes such as a large curve profile, which is not limited in this utility model.

As shown in fig. 2 to 3, fig. 2 is a schematic perspective view of the safety device 3 and the upper case 1. Preferably, the locking structure of the safety device 3 is a claw 301 in the shape as shown, the positioning structure of the upper shell 1 is a groove 102 as shown, the claw 301 can be snapped into the groove 102 to form a snap-fit structure, and the claw 301 can move in the groove 102 along the axial direction of the implantation system due to the certain length of the groove 102.

The groove 102 is provided with a first groove 103 and a second groove 104 which can fix the claw 301, preferably, the first groove 103 and the second groove 104 are round, and the claw 301 is provided with a round protrusion 302 which is matched with the first groove 103 and the second groove 104. Preferably, the diameter of the first recess 103, the second recess 104 is larger than the diameter of the protrusion 302, and the pawl 301 is in a relaxed state when the protrusion 302 is located in the first recess 103, the second recess 104, which prevents the failure of the function of the safety device 3 after a prolonged placement of the implant system.

Fig. 3 is a sectional view of the safety 3, the upper case 1, and the gear 4 after assembly. When the protrusion 302 of the safety device 3 is fixed in the second recess 104 at the proximal end of the groove 102, the elongated structure 303 of the safety device 3 will abut against the two teeth of the gear 4, thereby limiting the rotation of the gear 4, which is the locked state of the implantation system. When the protrusion 302 of the safety device 3 is fixed in the first recess 103 at the distal end of the groove 102, the elongated structure 303 of the safety device 3 moves out of the gap between the two teeth of the gear 4, so that the gear 4 can rotate, which is the unlocked state of the implantation system.

As shown in fig. 4 to 6, fig. 4 is a schematic perspective view of the outer tube 5 and the outer tube holder 6, and the upper case 1 and the lower case 2. Fig. 6 is a partial sectional view of the outer tube 5, the outer tube holder 6, the inner tube 7, the inner tube holder 8, the upper case 1, and the lower case 2 after assembly. Wherein, the outer tube 5 and the outer tube seat 6 are connected together through the hole shaft, preferably, as shown in fig. 6, the outer tube seat protrusion 601 of the outer tube seat 6 limits the insertion depth of the outer tube 5, which is convenient for positioning the outer tube 5 in the outer tube seat 6 in the production process, thereby improving the production efficiency.

Preferably, the upper shell 1 and the lower shell 2 are provided with positioning posts 107 and positioning holes 205 for fixing the relative positions of the two, and the shape of the positioning posts can be round, polygonal (such as hexagon), a positioning structure can also be a buckle or other structures, which is not limited in the application.

The circumferential grooves 602 of the outer tube socket 6 are embedded in the upper case protrusion 104 of the upper case 1 and the lower case protrusion 201 of the lower case 2, and the first circumferential protrusion 603 and the grooves 105, 202 are vice versa, so that the outer tube socket 6 is fixed in the upper case 1 and the lower case 2.

Fig. 5 is a schematic perspective view of the inner tube 7, the inner tube holder 8, and the upper case 1. The inner tube 7 and the inner tube holder 8 are connected together by a hole shaft, preferably, as shown in fig. 6, the first protrusion 801 of the inner tube holder 8 limits the insertion depth of the inner tube 7, which facilitates the positioning of the inner tube 7 in the inner tube holder 8 in the production process, thereby improving the production efficiency.

The provision of the needle tip angle 703 of the inner tube 7 helps to reduce penetration resistance while helping to conform to tissue structures during penetration, preferably with an angle value of 5-30 °.

The tip of the inner tube 7 is provided with chamfers 704 on both sides which will help reduce penetration resistance.

The diameter 802 of the inner hub 8 is close to the bore 604 of the outer hub 6 and is a clearance fit, which will prevent the inner hub 8 from deviating too much from the central axis during axial movement of the implant system, reducing product handling resistance.

The second protrusion 803 of the inner tube socket 8 can rotate in the shaped groove 106 1061 of the upper shell 1, and the bevel 701 of the inner tube 7 can rotate together by different angles to facilitate the operation.

As shown in fig. 6, the lumen 702 of the inner tube 7 provides an implantation channel for the drainage catheter 14. The outer tube 5, which is fitted over the outer side of the inner tube 7, provides a certain rigid protection for the inner tube 7 during penetration with the inner tube 7. After placement of the drainage catheter 14 to the surgical site, the inner tube 7 is retracted into the lumen 501 of the outer tube 5, avoiding damage to ocular tissue by the bevel 701 of the inner tube 7 during withdrawal of the implant system.

As shown in fig. 7 to 8, fig. 7 is a schematic perspective view of the gear 4, the inner core pusher 9, the inner core pusher 10, and the inner tube holder 8 after assembly, and fig. 8 is a schematic perspective view of the inner core pusher 9, the inner core 13, and the inner tube pusher 10. The snap points 901, 902 of the inner core pusher 9 are limited in the first guide rail 401 of the gear 4, the snap point 1001 of the inner core pusher 10 is limited in the second guide rail 402 of the gear 4, the inner core 13 is fixed in the hole 903 of the inner core pusher 9 by gluing or injection molding or other modes, when the gear 4 is rotated, the rotation motion of the gear 4 can be converted into the linear motion of the inner core pusher 9 and the inner core pusher 10, and the linear motion thereof has a certain relative relationship, and when the gear 4 is rotated to a certain angle, the teeth 403 of the gear 4 contact the racks 1002 of the inner core pusher 10, thereby pushing the inner core pusher 10 to move in the opposite direction (relative to the motion direction of the inner core pusher 9); when the gear 4 is rotated in the forward direction to drive the first clamping point 901 and the second clamping point 902 of the inner core pushing rod 9 to move on the first guide rail 401, the toothless part corresponds to the inner core pushing rod 10, so that the inner core pushing rod 10 is kept motionless and the inner core pushing rod 9 is driven to move forwards; when rotated by a certain angle, the teeth 403 are in contact with the racks 1002 on the inner tube push rod 10, so that the inner tube push rod 10 is driven to move backwards and the inner tube push rod 9 is not moved any more; when the gear 4 is reversely rotated, the teeth 403 contact the rack 1002, driving the inner push rod 10 to move forward and the inner push rod 9 not to move; when the teeth 403 are disengaged from the racks 1002, the inner push rod 10 is no longer moved and the inner push rod 9 is driven forward until it returns to its original position. All the movements of the gear wheel 4, the inner push rod 9, the inner push rod 10 described above are necessary for implantation of the drainage catheter 14. The drainage catheter 14 is fitted into the lumen 702 from the tip of the inner tube 7, and in use, the plunger rod 9 moves forward with the plunger to push the drainage catheter 14 forward.

Preferably, the movement distance of the inner core push rod 9 is 1-5 mm, and the movement distance of the inner core push rod 10 is 3-12 mm.

Preferably, the depth of the hole 903 of the core pusher 9 is fixed, the core 13 is simply inserted to the bottom for fixation, and no additional positioning is required, which will improve the productivity, and preferably, the depth of the hole 903 is 2 to 6mm.

Preferably, the tip of the core 13 may be rounded 1301, which will reduce the probability of damage to the drainage catheter 14.

In fig. 4, the limiting structures 203 and 204 of the lower case 2 can limit the distance of the inner tube push rod 10 moving back and forth, so that accurate positioning can be realized.

Fig. 9 is a schematic perspective view of the inner tube push rod 10 and the inner tube seat 8, wherein the through groove 1003 of the inner tube push rod 10 and the third protrusion 804 of the inner tube seat 8 form a fastening structure, and the inner tube seat 8 can rotate along the circumferential direction.

As shown in fig. 10, the plug 11, the protective sheath 12, the outer tube 5, the inner tube 7, and the outer tube holder 6 are partially cross-sectional views, and the protective sheath 12, the plug 11, the inner core 13, the inner tube 7, the outer tube 5, and the drainage catheter 14 are partially enlarged views. The plug 11 is an elongated needle that can be inserted into the lumen 702 of the inner tube 7, the protective sleeve 12 can be inserted into the tip 604 of the outer tube holder 6 and form an interference fit with the second circumferential projection 605, and meanwhile, the protective sleeve 12 can abut against the tip 1101 of the plug 11 at the inner portion 1201, so that the plug 11 is prevented from falling off during the product transferring process, and further, the drainage catheter 14 is prevented from falling off.

In the case of convenient product processing, the assembly of the inner tube 7 and the inner tube seat 8 can be a standard needle 15 (comprising the inner tube 7 and the inner tube seat 8), the inner tube seat 8 of the standard needle 15 is connected with the angle regulator 18 through a fastening structure, and the angle regulator 18 is connected with the 1003 structure of the inner tube push rod 10 through a fastening structure similar to 804. The design can reduce the bonding connection process of the inner tube 7 and the inner tube seat 8, and improve the product efficiency. Since the standard needle 15 has a relatively large volume, the dimensions of the outer tube holder 6 should be correspondingly reduced, and the inner tube holder 8 and the outer tube holder 6 have structures 601, 801 for positioning the outer tube 5 and the inner tube 7, as shown in fig. 11 and 12.

Although specific embodiments of the utility model have been disclosed for illustrative purposes, it will be appreciated by those skilled in the art that the utility model may be implemented with the help of a variety of examples: various alternatives, variations and modifications are possible without departing from the spirit and scope of the utility model and the appended claims. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this utility model, but that the utility model will have the scope indicated by the scope of the appended claims.

Claims (10)

1. The glaucoma catheter implantation system is characterized by comprising a shell and an implantation channel, wherein a safety mechanism and a transmission mechanism are arranged in the shell;

one end of the implantation channel is connected with the front end of the shell and is used for providing a cavity for the drainage catheter;

The transmission mechanism is respectively connected with the implantation channel and the safety mechanism and is used for pushing out the drainage catheter through the implantation channel and implanting the drainage catheter into the operation position;

the safety mechanism is used for controlling the operation of the transmission mechanism.

2. The glaucoma catheter implantation system of claim 1, wherein the implantation channel comprises an outer tube (5), an outer tube seat (6), an inner tube (7), an inner tube seat (8); the outer tube seat (6) and the inner tube seat (8) are fixed in the shell, one end of the outer tube (5) is connected with the outer tube seat (6), and one end of the inner tube (7) is connected with the front end of the inner tube seat (8) through the outer tube (5) and the outer tube seat (6).

3. The glaucoma catheter implantation system according to claim 2, wherein the inner tube holder (8) is located at a central axis position within the housing and is rotatable in axial direction; the inner tube seat (8) is connected with the transmission mechanism, and the transmission mechanism controls the inner tube seat (8) to move back and forth along the central axis, so that the drainage catheter is pushed out and implanted into the operation site.

4. A glaucoma catheter implantation system according to claim 2 or 3, characterized in that the inner tube holder (8) is provided with a second protrusion (803) and the housing is provided with a profiled groove (106); and the second protrusion (803) is controlled to rotate in the special-shaped groove (106), so that the inner tube seat (8) is controlled to rotate along the axial direction.

5. The glaucoma catheter implantation system of claim 2 or 3, wherein the transmission mechanism comprises a gear (4), an inner tube pushrod (10), an inner core (13), an inner core pushrod (9); the gear (4) is connected with the inner pipe push rod (10) and the inner core push rod (9) and is used for driving the inner pipe push rod (10) and the inner core push rod (9) to stretch; the inner pipe push rod (10) is connected with the inner pipe seat (8) and used for controlling the inner pipe seat (8) to move back and forth along the central axis; the inner core push rod (9) is connected with the inner core (13), the inner core (13) is used for extending into the inner tube (7) through the inner tube seat (8) and contacting with the drainage catheter, and the inner core push rod (9) is used for controlling the drainage catheter to be pushed out and implanted into an operation position through driving the inner core (13).

6. The glaucoma catheter implantation system according to claim 5, wherein a first guide rail (401), a second guide rail (402) are provided on the gear (4), the gear (4) comprising a toothed portion and a toothless portion; the front end of the inner tube push rod (10) is connected with the inner tube seat (8), and the rear end of the inner tube push rod (10) is provided with a rack (1002) for being matched with the teeth (403) of the toothed part; the first guide rail (401) is used for limiting the position of the inner core push rod (9), and the second guide rail (402) and the teeth (403) are used for limiting the position of the inner core push rod (10); a first clamping point (901) and a second clamping point (902) are arranged on the inner core push rod (9), the first clamping point (901) and the second clamping point (902) respectively operate in the first guide rail (401), and the clamping point (1001) of the inner core push rod (10) operates in the second guide rail (402); when the gear (4) is rotated, the rotation motion of the gear (4) is converted into linear motion of the inner core push rod (9) and the inner pipe push rod (10); when the gear (4) is rotated positively to drive a first clamping point (901) and a second clamping point (902) of the inner core push rod (9) to move on the first guide rail (401), the toothless part corresponds to the inner pipe push rod (10), so that the inner pipe push rod (10) is kept motionless and the inner core push rod (9) is driven to move forwards; when rotated by a certain angle, the teeth (403) are in contact with racks (1002) on the inner tube push rod (10), so that the inner tube push rod (10) is driven to move backwards, and the inner core push rod (9) is not moved any more; when the gear (4) is reversely rotated, the teeth (403) are contacted with the rack (1002), the inner tube push rod (10) is driven to move forwards, and the inner tube push rod (9) does not move; when the teeth (403) are separated from the rack (1002), the inner tube push rod (10) does not move any more, and the inner tube push rod (9) is driven to move forwards until the inner tube push rod returns to the original position.

7. A glaucoma catheter implantation system according to claim 1 or 2 or 3, characterized in that the housing consists of an upper shell (1), a lower shell (2), the upper shell (1) being provided with a groove (102) for positioning; the safety mechanism comprises a safety (3), wherein a claw (301) and a strip structure (303) are arranged on the safety (3), the claw (301) is used for being clamped into the groove (102) to form a clamping structure, and the claw (301) can move in the groove (102) along the axial direction of the implantation system; the elongated structure (303) is used for locking or unlocking the rotation of the gear (4).

8. The glaucoma catheter implantation system according to claim 7, wherein a first groove (103) and a second groove (104) for fixing the claw (301) are arranged on the groove (102), the first groove (103) and the second groove (104) are circular grooves, and the claw (301) is provided with a circular protrusion (302) matched with the first groove (103) and the second groove (104); when the protuberance (302) is fixed in the second recess (104) of the proximal end of the groove (102), the strip (303) is abutted between two teeth of the gear (4), so as to limit the rotation of the gear (4); when the protrusion (302) is fixed in the first recess (103) at the distal end of the groove (102), the elongated structure (303) moves out of the gap between the two teeth of the gear (4), allowing the gear (4) to rotate.

9. The glaucoma catheter implantation system according to claim 1, further comprising a protection mechanism, wherein the protection mechanism comprises a plug (11) and a protective sleeve (12), the plug (11) is in interference fit with the front end of the inner tube (7) in the shaft hole, and the protective sleeve (12) is in interference fit with the outer tube seat (6) in the shaft hole.

10. The glaucoma catheter implantation system of claim 1, wherein the housing front outer surface is provided with an anti-slip structure (101); the anti-skid structure (101) is a stripe structure with concave-convex intervals.