Implanting device of drainage tube

Abstract

The invention discloses a drainage tube implanting device which comprises a shell and a drainage tube moving assembly, and the drainage tube moving assembly comprises a pushing assembly, a sharp needle assembly and a solid needle assembly; the pushing assembly is in transmission connection with the sharp needle assembly through a gear; the sharp needle assembly is in meshed connection with the solid needle assembly through the gear and the rack; the sharp needle assembly comprises a sharp needle gear, a sharp needle rack, a central column, a sharp needle adjusting button and a sharp needle which are connected in sequence; the sharp needle rack comprises a first limiting block, a limiting strip and a tooth-shaped structure which are connected in sequence; the limiting strip penetrates through a first groove in the center column base. And when the limiting strip moves towards the rack structure, the first limiting block can clamp the first groove, so that the moving distance of the limiting strip along the first groove is limited. The implantation device is used for glaucoma operation, the difficulty and risk of the operation can be reduced, the problems that the drainage tube is blocked when entering the eyes and the position is wrong in the operation process are solved, the accuracy of the operation is improved, and the injury of the operation to a patient is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of ophthalmic surgical medical instruments, and in particular relates to an implantation device for a drainage tube. Background Art

[0002] Glaucoma is one of the major blinding eye diseases in my country. Glaucoma occurs when intraocular pressure is higher than normal pressure for a long time. The intraocular pressure increases due to the imbalance between the production and drainage of aqueous humor. The increased intraocular pressure can cause irreversible damage to the optic nerve and retinal fibers, causing the patient's gradual loss of vision, or even permanent blindness.

[0003] Traditional glaucoma drainage valve implantation is performed through surgical windowing, which requires high operation requirements from doctors and causes great trauma to patients. However, minimally invasive glaucoma valve implantation, such as Zanyi The glaucoma drainage tube is a drainage device that is implanted into the patient's eye through a needle with a tiny wound. It is more conducive to clinical use by doctors and rapid recovery of patients. It is gradually becoming an important means of clinical treatment of glaucoma. The key steps of this operation are anterior chamber puncture and placement of the drainage tube. The accuracy of the puncture depends largely on the experience of the operator, which invisibly increases the difficulty and risk of the operation. In addition, the drainage tube is mainly made of soft silicone. When it enters the anterior chamber through the puncture channel, the drainage tube is often blocked and inserted in the wrong position, causing unnecessary damage to the patient.

[0004] CN107456259B discloses a push-in device for solid implants, which includes an outer sleeve, a reciprocating push rod, a transmission gear, a linkage sleeve, and an ejector pin. The threaded interface at the bottom of the linkage sleeve can be connected to the needle seat of the puncture needle. The ejector pin passes through the center of the linkage sleeve and is fixed to the top of the main cylinder of the outer sleeve, and can enter the needle core of the puncture needle. The linkage sleeve can move relatively along the main cylinder of the outer sleeve by pressing the reciprocating push rod through the transmission gear to eject the solid implant and pull out the puncture needle. The device can make it more convenient for users to perform fixed-length implantation and pull out the puncture needle in situ. During the process of pulling out the puncture needle, the solid implant will not be offset and will accurately stay in the predetermined position, thereby improving the stability of pulling out the puncture needle during the implantation process. However, the push-in device has the following shortcomings:

[0005] 1. The moving distance and speed of the ejector are adjusted by only one transmission gear in the push injection device, and mainly rely on the experience and proficiency of the operator. The moving distance of the ejector has low control accuracy and is difficult to operate.

[0006] 2. The puncture needle in the push injection device is connected to the moving sleeve by a threaded connection and cannot rotate around the moving sleeve. Therefore, the angle at which the puncture needle tip penetrates into the human body (the subconjunctival layer of glaucoma patients) cannot be adjusted, which is not conducive to accurately adjusting the angle at which the solid implant is implanted into the human body, and invisibly increases the difficulty of the operation.

[0007] 3. The puncture needle and the movement sleeve are fixed together and can only move at the same time. There is a lack of buffer space between the movement of the puncture needle and the movement of the movement sleeve, which requires the operator's manual push action to be precise, increasing the operator's psychological pressure and increasing the difficulty and risk of the operation. Summary of the invention

[0008] In order to solve the above-mentioned technical problems, reduce the difficulty and risk of glaucoma surgery, avoid obstruction and positioning errors when the drainage tube is inserted into the eye during surgery, improve the accuracy of surgery, reduce the damage to patients during surgery, and alleviate patients' pain, the present invention is achieved through the following technical means.

[0009] The present invention provides a glaucoma drainage tube implantation device, which comprises a housing and a drainage tube moving assembly. The drainage tube moving assembly is arranged in the housing, and comprises a separately arranged pushing assembly, a sharp needle assembly and a solid needle assembly.

[0010] The pushing assembly is connected to the sharp needle assembly through gear transmission, and the sharp needle assembly is connected to the solid needle assembly through the meshing of a gear and a rack.

[0011] The pushing assembly includes a pushing block, a pushing rack and a pushing gear; the sharp needle assembly includes a sharp needle gear, a sharp needle rack, a center column, a sharp needle adjustment button and a sharp needle connected in sequence; and the solid needle assembly includes a solid rack and a solid needle.

[0012] When the pushing assembly moves back and forth, it can drive the sharp needle of the sharp needle assembly and the pushing block of the pushing assembly to move in opposite directions through gear transmission. At the same time, the sharp needle assembly and the solid needle assembly are driven by gears and racks to make the sharp needle of the sharp needle assembly and the solid needle of the solid needle assembly move in opposite directions.

[0013] Furthermore, in the pushing assembly, the pushing block is fixedly connected to the pushing rack, and the pushing rack and the pushing gear are meshed with each other.

[0014] Furthermore, the pushing block can be fixed to one side of the pushing rack by welding or bolts. There is no toothed structure on the surface of one side of the pushing rack, or a toothed structure can be provided. The selection can be flexible based on the contact area between the pushing rack and the pushing block, the difficulty of processing, the ease of assembly of the implant device, etc.

[0015] Furthermore, a toothed structure is provided on the surface of the other side of the pushing rack and meshes with the pushing gear.

[0016] When the operator pushes the push block to move in a straight line by hand, the push block drives the push rack to move synchronously, and further drives the push gear to rotate. By changing the moving direction of the push block, the rotation direction of the push gear can be adjusted.

[0017] Preferably, in the sharp needle assembly, the sharp needle gear and the sharp needle rack are meshed with each other, and the sharp needle gear is fixedly connected and coaxial with the pushing gear, so that the pushing assembly is connected to the sharp needle assembly through gear transmission.

[0018] Furthermore, the sharp pin gear is fixed on the pushing gear, and the central axis of the sharp pin gear coincides with the central axis of the pushing gear, thereby ensuring that the two gears can rotate coaxially. Preferably, the sharp pin gear and the pushing gear are bonded together or integrally formed.

[0019] Furthermore, the sharp pin gear and the push gear are respectively fixed at two ends of the same rotating shaft, so as to realize coaxial rotation. Preferably, the two gears are connected to the rotating shaft via a key.

[0020] Furthermore, the ratio of the number of teeth of the push gear to the sharp pin gear is greater than or equal to 1:1. When the number of teeth of the push gear to the sharp pin gear is greater than 1, such as 2:1, 3:1, 4:1, 5:1, etc., the long-distance rotation of the push gear can be converted into the short-distance rotation of the sharp pin gear, thereby improving the adjustment accuracy of the moving distance of the sharp pin rack. Specifically, it can be adjusted according to the requirements of the moving speed of the push block and the moving speed of the sharp pin rack, thereby improving the moving accuracy of the drainage tube.

[0021] Furthermore, the pushing rack and the sharp pin rack are respectively arranged on the upper and lower sides of the central axis of the pushing gear. When the sharp pin gear and the pushing gear rotate coaxially, the pushing rack and the sharp pin rack move in opposite directions.

[0022] Through the coaxial design of the pushing gear and the sharp needle gear, and the arrangement of the pushing rack and the sharp needle rack on both sides of the central axis of the pushing gear, and utilizing the transmission effect of the gear rack, it can be achieved that when the pushing block moves back and forth, the sharp needle of the sharp needle assembly and the pushing block are driven to move in opposite directions through gear transmission.

[0023] Furthermore, in the sharp needle assembly, the central column includes a first cylindrical body and a base, and a first groove is provided on the base.

[0024] The sharp-needle rack includes a toothed structure, a limiting strip and a first limiting block connected in sequence, the toothed structure is connected to one end of the limiting strip, and the other end of the limiting strip is connected to the first limiting block.

[0025] The limiting strip passes through the first groove, and the first limiting block can contact and clamp the edge of the first groove, so that the central column is connected to the sharp-needle rack.

[0026] Specifically, when the limiting bar passes through the first groove and moves toward the toothed structure, the first limiting block gradually contacts and catches the edge of the first groove, thereby limiting the distance that the limiting bar moves along the first groove toward the rack structure.

[0027] Specifically, when the sharp needle rack moves toward the rear end of the shell, the limit bar moves toward the rear end of the shell along the first groove. Before the first limit block contacts the first groove, there is no mutual squeezing effect between the sharp needle rack and the central column, and the central column and the sharp needle connected to the central column cannot move toward the rear end of the shell. When the first limit block contacts and jams the first groove, the first limit block squeezes the base of the central column, driving the central column to move toward the rear end of the shell, and then driving the sharp needle to retreat, so that the glaucoma drainage tube can be separated from the sharp needle and enter the patient's subconjunctival layer.

[0028] A stopper may be provided on the side of the toothed structure at the connection with the limiting strip. When the stopper contacts the side edge of the first groove, it can clamp and squeeze the side edge of the first groove, thereby preventing the toothed structure from moving along the first groove toward the front end of the shell.

[0029] When the sharp needle rack moves toward the front end of the shell, when the toothed block on the sharp needle rack catches the first groove of the base of the center column, the limit bar and the base are relatively stationary, and the sharp needle rack gradually squeezes the base, thereby gradually pushing the center column and the sharp needle to move synchronously toward the front end of the shell.

[0030] In another embodiment, the height of the teeth in the toothed structure can also be adjusted so that the toothed structure can contact the upper edge of the first groove, clamp and squeeze the upper edge of the first groove, and push the center column and the sharp needle to move synchronously toward the front end of the shell.

[0031] Furthermore, when performing glaucoma surgery, the front end of the shell is close to the patient's eyes, and the rear end of the shell is far away from the patient's eyes.

[0032] Preferably, the moving distance of the limit bar is greater than or equal to the spacing distance between the needle tip of the solid needle and the glaucoma drainage tube, and the moving distance of the limit bar is equal to the length of the limit bar minus the thickness of the base. This design ensures that during the time from the sharp needle rack moving toward the rear end of the shell to the time when the first limit block moves and catches the first groove, there is no interaction between the sharp needle rack and the center column, and the sharp needle rack will not drive the sharp needle to retreat. During this period of time, the movement of the sharp needle rack has an empty stroke, that is, the moving distance of the limit bar, thereby providing a buffer space and adaptation time for the surgical operator to adjust the forward speed and distance of the glaucoma drainage tube, which is conducive to improving the accuracy of the operation.

[0033] At the same time, when glaucoma drainage tubes of different lengths and specifications are used in the operation, the present invention can ensure that the glaucoma drainage tube has entered the patient's subconjunctival layer during the operation by setting a limit bar structure and an appropriate moving distance of the limit bar, and the sharp needle begins to withdraw, thereby achieving effective in situ implantation. For example, when the drainage tube used in clinical surgery is small, the moving distance of the limit bar is greater than the distance between the needle tip of the solid needle and the glaucoma drainage tube, which can ensure that the sharp needle withdraws after the needle tip of the solid needle contacts and pushes the glaucoma drainage tube into the patient's subconjunctival layer, and performs in situ implantation, thereby ensuring the accuracy and stability of the operation, being adaptable to diversified surgical scenarios, and being conducive to clinical promotion.

[0034] Furthermore, the sharp needle adjustment button includes a handle and a second tubular body, the handle is arranged on the outer wall of the second tubular body, and the rear end of the second tubular body is connected to the front end of the first tubular body;

[0035] The needle plug of the sharp needle is sleeved on the front end of the second cylindrical body, and a drainage tube is placed in the needle stem of the sharp needle. Preferably, the drainage tube is placed at the front end of the needle stem of the sharp needle;

[0036] A slot cooperating with the handle is provided on the front end side wall of the shell, and the slot is used to limit the movement of the handle and the sharp needle, and at the same time limit the deviation of the angle of the sharp needle during the operation.

[0037] Furthermore, the number of the card slots is one or a plurality of card slots arranged around the axis of the sharp needle, and the plurality of card slots are parallel to each other, for example, 3, 5 or 7 card slots may be arranged, so as to provide more precise angle adjustment. When performing a glaucoma drainage tube implantation operation, the sharp needle is first inserted into the subconjunctival layer of the patient at a preset angle, and then the handle of the sharp needle adjustment button is rotated around the axis of the sharp needle to precisely fine-tune the angle of the sharp needle tip.

[0038] Although the angle and direction of the sharp needle entering the patient's anterior chamber have been set before the operation, due to the complexity and individual differences of the human eyeball structure, in order to better match the angle of the implant entering the patient's subconjunctival layer, the present invention adopts a handle and multiple parallel slots to further accurately fine-tune the angle of the sharp needle tip.

[0039] According to the fine-tuning angle, align the handle with the corresponding slot. As the sharp needle retreats, the handle moves into the corresponding slot, so that the drainage tube is implanted into the patient's eye at a precise angle. When the handle moves to the end of the slot, the sharp needle and the sharp needle rack both stop moving toward the rear end of the shell. The length of the slot can be set according to the moving distance of the sharp needle. In one embodiment of the present invention, the length of the slot can be equal to the moving distance of the sharp needle, that is, the moving distance of the toothed structure in the sharp needle rack. The movement of the handle of the sharp needle adjustment button is limited by the slot, and the moving distance of the sharp needle is further limited.

[0040] Furthermore, the first cylindrical body in the central column and the base are fixedly connected or integrally formed. Preferably, the first cylindrical body and the base can be connected by bonding or bolts.

[0041] Furthermore, the first cylindrical body comprises a hollow cylinder at the front end and a cylinder at the rear end, the hollow cylinder and the cylinder are coaxial, and preferably, the outer diameter of the hollow cylinder is smaller than the outer diameter of the cylinder.

[0042] Furthermore, a second groove is provided on the hollow cylinder along the axis, and a second limit block is provided at the front end of the hollow cylinder.

[0043] Preferably, the second tubular body of the sharp needle adjustment button is sleeved on the hollow cylinder of the first tubular body of the central column, and the second limit block is clamped on the front end of the second tubular body to prevent the sharp needle adjustment button from moving axially along the hollow cylinder.

[0044] Furthermore, the solid rack is meshed with the sharp needle gear, and the solid needle is connected to the solid rack. Preferably, the needle bolt of the solid needle is sleeved on the front end of the solid rack.

[0045] Preferably, the solid rack and the sharp-pin rack are respectively located at the upper and lower sides of the sharp-pin gear, and the sharp-pin rack and the solid rack can be driven to move in opposite directions by the rotation of the sharp-pin gear.

[0046] Furthermore, the solid rack includes a toothed structure at the rear end and a connecting block at the front end. In one embodiment, the connecting block is cylindrical.

[0047] Preferably, the solid needle is a flat-head needle, the needle plug of the solid needle is sleeved on the connecting block, and the needle stem of the solid needle is located inside the needle stem of the sharp needle.

[0048] Furthermore, the flat-head needle tip of the solid needle may or may not contact the drainage tube.

[0049] In order to adapt to drainage tubes of different lengths and specifications, in general, the solid needle does not touch the drainage tube, and the two maintain an appropriate distance. The limit strip in the sharp needle rack is used to adjust the timing of the sharp needle retreat to ensure in situ implantation.

[0050] In one embodiment of the present invention, the flat tip of the solid needle does not contact the drainage tube.

[0051] The solid needle is used to push the drainage tube out of the sharp needle.

[0052] Preferably, the implantation device further comprises a blunt needle for fixing the sharp needle.

[0053] Furthermore, a blunt needle fixing seat is arranged inside the front end of the shell, and the needle bolt of the blunt needle is sleeved on the blunt needle fixing seat.

[0054] Furthermore, the length of the blunt needle is shorter than that of the sharp needle, the needle stem of the sharp needle passes through the needle stem of the blunt needle, and the needle tip of the sharp needle extends out of the needle tip of the blunt needle.

[0055] Preferably, the solid needle, the sharp needle and the blunt needle are coaxial.

[0056] In the implant device of the present invention, the front end of the shell is connected to the shell cover, the rear end of the shell is connected to the shell cap, the shell is detachably connected to the shell cover, and the shell cap is detachably connected to the shell.

[0057] Furthermore, a retaining plug is provided in the housing cover, and the tip of the sharp needle is connected to the retaining plug in a plug-in manner. The retaining plug can further fix the sharp needle and increase the stability of the sharp needle.

[0058] Preferably, a bearing is arranged on the inner wall of the shell, and two ends of the rotating shaft respectively pass through the pushing gear and the sharp needle gear and are fixed in the bearing.

[0059] Preferably, a slide groove is provided on the rear end side surface of the housing along the central axis direction of the housing, and the push block can move along the slide groove.

[0060] Furthermore, a scale may be provided on the housing next to the slide slot to mark the distance moved by the push block.

[0061] Furthermore, the implant device also includes a positioning pin, which passes through the shell and is fixedly connected to the pushing component, preferably connected to the pushing rack, and the positioning pin and the pushing rack are connected by bolts or clamps.

[0062] After removing the positioning pin, the operator can push the push block to slide forward along the slide groove by hand, drive the push rack forward, drive the push gear and the sharp needle gear to rotate synchronously clockwise, and the sharp needle rack retreats and drives the sharp needle backward. At the same time, due to the meshing action of the sharp needle gear and the solid rack, when the sharp needle gear rotates clockwise, the solid rack moves toward the front end of the housing, driving the solid needle forward. Under the combined action of the solid needle advancing and the sharp needle retreating, the glaucoma drainage tube extends out and detaches from the sharp needle, and enters the patient's eye.

[0063] Preferably, three slide rails are arranged inside the shell, and the pushing rack, the sharp-needle rack and the solid rack are respectively connected to one slide rail and can slide back and forth along the slide rails.

[0064] Furthermore, the shell is formed by snapping and connecting two parts, and this design facilitates the assembly, disassembly, and replacement of internal components of the glaucoma drainage tube implant device.

[0065] Beneficial effects of the present invention:

[0066] 1. The implantation device of the present invention has an ingenious structural design. The push assembly and the sharp needle assembly are driven by gears. The push gear and the sharp needle gear rotate coaxially to drive the sharp needle to move. At the same time, the sharp needle assembly and the solid needle assembly adopt a gear and rack transmission method. The sharp needle rack and the solid rack respectively arranged on the upper and lower sides of the sharp needle gear control the moving direction of the sharp needle and the solid needle. The sharp needle gear is used as a bridge. The surgical operator only needs to push the push block to drive the sharp needle and the solid needle to move at the same time. Through the cooperation of the two, the sharp needle moves backward and the solid needle moves forward, pushing the drainage tube forward and detaching from the sharp needle, accurately pushing the drainage tube into the patient's subconjunctival layer, and completing the in situ implantation of the drainage tube. When the implantation device of the present invention is used for glaucoma surgery, the operation is simple and convenient, reducing the difficulty and risk of glaucoma surgery.

[0067] 2. The present invention designs the moving distance of the limit bar in the sharp needle rack to be greater than or equal to the spacing distance between the flat-head needle tip of the solid needle and the glaucoma drainage tube, so that when the sharp needle rack moves toward the rear end of the shell until the first limit block is stuck in the first groove, there is no contact between the sharp needle rack and the center column, that is, the sharp needle rack will not drive the sharp needle to retreat, thus achieving an idle stroke when the sharp needle rack moves. The idle stroke design provides the surgical operator with time to adapt and buffer when adjusting the forward speed and distance of the drainage tube, which is conducive to improving the accuracy and effect of the operation; at the same time, the design of the limit bar can meet the implantation of glaucoma drainage tubes of different specifications during clinical surgery, and can be applied to various glaucoma drainage tube implantation surgeries.

[0068] 3. The sharp needle adjustment button in the present invention can further adjust the angle of the sharp needle tip in the patient's subconjunctival layer, so that the angle at which the drainage tube enters the patient's subconjunctival layer is more accurate. Moreover, through the cooperation of the sharp needle adjustment button and the different card slots at the front end of the housing, the moving distance of the sharp needle can be limited, thereby improving the accuracy of the surgery.

[0069] 4. The implant device of the present invention can adjust the ratio of the number of teeth of the pushing gear and the sharp needle gear, and then accurately control the moving distance of the pushing gear and the sharp needle. Especially when the number of teeth of the pushing gear and the sharp needle gear is greater than 1, the short-distance rotation of the pushing gear can be converted into the long-distance rotation of the sharp needle gear, thereby improving the adjustment accuracy of the moving distance of the sharp needle rack and reducing the difficulty of operation for the doctor.

[0070] 5. The implantation device of the present invention only uses the transmission of gears and racks, and can simultaneously adjust the movement direction and distance of the sharp needle, blunt needle, and solid needle to drive the drainage tube. The mechanical structure is simple, and the internal space of the implantation device is fully utilized, which is convenient for the surgical operator to hold and use during glaucoma surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] Figure 1 is an appearance diagram of the implant device of the present invention;

[0072] Figure 2 It is the EE cross-sectional view of the implant device of the present invention (schematic diagram of the structure on the plane of the sharp needle gear);

[0073] Figure 3 It is a DD cross-sectional view of the implant device of the present invention (structural schematic diagram on the plane of the push gear);

[0074] Figure 4 An exploded view of the implant device of the present invention;

[0075] Figure 5 is a structural diagram of the central column;

[0076] Figure 6 This is an enlarged view of the connection between the center column and the sharp needle rack;

[0077] Figure 7 This is a bottom view of the connection between the center column and the sharp needle rack.

[0078] The reference numerals in the figures are as follows: 101-housing cap, 102-positioning pin, 103-pushing block, 104-slideway, 105-housing, 106-slot, 107-sharp needle adjustment button, 108-housing cover, 201-solid rack slide rail, 202-solid rack, 203-pushing rack, 204-blunt needle, 205-retaining plug, 206-sharp needle, 207-hollow cylinder, 208-circular Cylinder, 209-first limiting block, 210-base, 211-toothed structure of sharp needle rack, 212-solid needle, 213-sharp needle rack slide rail, 214-rotating shaft, 215-sharp needle gear, 301-handle, 302-limiting bar, 303-pushing gear, 401-pushing rack slide rail, 402-stopper, 501-second limiting block, 502-second groove, 503-first groove. DETAILED DESCRIPTION

[0079] The technical scheme of the present invention is described clearly and completely below in conjunction with the embodiments and drawings. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0080] It should be noted that the terms "first" and "second" in the abstract, claims and specification of the present invention are only used to describe similar objects and do not necessarily mean a chronological order or a specific sequence. In addition, terms such as "upper", "lower", "front" and "back" indicating directions are all relative to the attached Figure 2 "Front" refers to the direction in which the guide tube is pushed, i.e., the direction in which the retaining plug 205 in the implant device is located. "Back" refers to the opposite direction in which the guide tube is pushed, i.e., the direction in which the outer shell cap 101 in the implant device is located. "Up" refers to the direction in which the top end of the positioning pin 102 is relative to the outer shell 105, and "down" refers to the direction in which the bottom end of the positioning pin 102 is inserted into the outer shell 105.

[0081] like Figure 1-Figure 4As shown, the glaucoma drainage tube implantation device of the present invention comprises a housing 105, a positioning pin 102, a blunt needle 204, a drainage tube and a drainage tube moving assembly. The drainage tube moving assembly is arranged in the housing 105, and the drainage tube is installed on the drainage tube moving assembly. The drainage tube moving assembly adopts a rack and pinion structure transmission. A slide groove 104 along the central axis direction of the housing is provided on the rear end side of the housing 105, and the positioning pin 102 passes through the positioning pin hole on the housing 105 and is fixedly connected to the pushing rack 203 in the drainage tube moving assembly. The positioning pin 102 mainly controls the movement or stillness of the drainage tube moving assembly. When the positioning pin 102 is pulled out of the implantation device, the drainage tube moving assembly can move forward and backward on the housing 105 along the slide groove 104; when the positioning pin 102 is inserted into the pushing rack 203, the drainage tube moving assembly is fixed on the housing 105, and the drainage tube moving assembly cannot move along the slide groove 104.

[0082] like Figure 2 and Figure 3 As shown, the drainage tube moving assembly includes a push assembly, a sharp needle assembly and a solid needle assembly, and all three assemblies adopt a gear rack transmission mode. The push assembly and the sharp needle assembly are connected to each other through a gear, and the sharp needle assembly and the solid needle assembly are connected to each other through a gear and a rack.

[0083] The pushing assembly includes a pushing block 103, a pushing rack 203 and a pushing gear 303. The pushing block 103 can slide forward and backward along the slide groove 104. The pushing block 103 is fixedly connected to the pushing rack 203, and the pushing block 103 can be fixed to the upper side of the pushing rack 203 as a whole by welding or bolts. There is no tooth structure on the upper surface of the pushing rack 203. A tooth structure is provided on the lower surface of the pushing rack 203, and it meshes with the pushing gear 303. The pushing gear 303 is fixed on the rotating shaft 214, and the two are connected by a key, such as a flat key or a spline. The pushing rack 203 is arranged on the pushing rack slide rail 401 (see Figure 4 ), the push rack 203 can slide along the push rack slide rail 401, so that the push gear 303 rotates clockwise or counterclockwise. When the surgical operator pushes the push block 103 to move forward and backward along the slide groove 104 by hand, the push block 103 can drive the push rack 203 to move synchronously, and further drive the push gear 303 to rotate. By changing the moving direction of the push block 103, the rotation direction of the push gear 303 can be adjusted, that is, clockwise or counterclockwise.

[0084] like Figure 2 to Figure 4As shown, the sharp needle assembly includes a sharp needle gear 215, a sharp needle rack, a center column, a sharp needle adjustment button 107 and a sharp needle 206. The tooth structures of the sharp needle gear 215 and the sharp needle rack are meshed with each other. The sharp needle gear 215 is fixed to the rotating shaft 214 by a spline. A bearing is arranged on the inner wall of the rear end of the housing 105, and the two ends of the rotating shaft 214 pass through the pushing gear 303 and the sharp needle gear 215 respectively, and are fixed in the bearing. The rotating shaft 214 connects the sharp needle gear 215 and the pushing gear 303 as a whole, and the gear ratio of the pushing gear 303 to the sharp needle gear 215 is 2:1, thereby converting the long-distance rotation of the pushing gear into the short-distance rotation of the sharp needle gear, thereby improving the adjustment accuracy of the moving distance of the sharp needle rack. When the pushing gear 303 rotates, it can drive the rotating shaft 214 to rotate in the same direction, and then drive the sharp needle gear 215 to rotate in the same direction. The pushing rack 203 and the sharp pin rack are respectively located on the upper and lower sides of the rotating shaft 214. When the pushing gear 303 and the sharp pin gear 215 rotate coaxially, the sharp pin rack and the pushing rack 203 move in opposite directions.

[0085] like Figure 2-Figure 5 As shown, the center column includes a first cylindrical body and a base 210, and the tail end of the first cylindrical body is fixedly connected to the base 210, and the two can be connected by bonding or bolts. The first cylindrical body includes a hollow cylinder 207 at the front end and a cylinder 208 at the rear end. The hollow cylinder 207 and the cylinder 208 are coaxial, and the outer diameter of the hollow cylinder 207 is smaller than the outer diameter of the cylinder 208. A second groove 502 is provided on the hollow cylinder 207 along the axis, and a second limit block 501 is provided at the front end of the hollow cylinder 207. A first groove 503 is provided on the base 210.

[0086] The sharp needle rack includes a first limit block 209, a limit bar 302 and a toothed structure 211. The first limit block 209 is connected to the front end of the limit bar 302, and the first limit block 209 and the limit bar 302 are in a horizontal T-shaped structure. The rear end of the limit bar 302 is connected to the toothed structure 211, and a stopper 402 is provided on the side of the toothed structure 211 where the two are connected. The limit bar 302 passes through the first groove 503, and the first limit block 209 can be mutually engaged with the first groove 503, thereby connecting the center column and the sharp needle rack. The first limit block 209 mainly limits the movement of the limit bar 302 along the first groove 503 to the rear end of the sharp needle rack, and the moving distance of the limit bar 302 can limit the distance it moves along the first groove 503 to the rear end of the sharp needle rack.

[0087] When the sharp needle gear 215 drives the toothed structure of the sharp needle rack to move toward the rear end of the housing 105 by mutual engagement, the limit bar 302 and the first limit block 209 both move toward the rear end of the housing 105 synchronously. During the time from the limit bar 302 starting to move to the time when the first limit block 209 contacts the first groove 503, the sharp needle rack moves in an empty stroke, during which the center column is in a stationary state, and the sharp needle 206 is also stationary. As the limit bar 302 continues to move, the first limit block 209 contacts and squeezes the first groove 503, thereby driving the center column to move toward the rear end of 105. Since the sharp needle 206 is connected to the center column through the sharp needle adjustment button 107, the sharp needle 206 will retreat as the center column moves toward the rear end of the housing 105, causing the glaucoma drainage tube to gradually detach from the sharp needle 206 and be implanted in the patient's subconjunctival layer.

[0088] When the sharp needle rack moves toward the front end of the housing 105, as the limit bar 302 moves forward, the sharp needle rack passes through a period of idle travel, and the stopper 402 (such as Figure 6 ) gradually jams the first groove 503, so that the limit bar 302 and the base 210 are in a relatively static state, and the stopper 402 squeezes the base 210, thereby gradually pushing the center column and the sharp needle rack to move synchronously toward the front end direction of the shell 105.

[0089] like Figure 2 and Figure 3 As shown, the sharp needle adjustment button 107 includes a handle 301 and a second tubular body, and the handle is arranged on the outer wall of the second tubular body. The second tubular body is sleeved on the hollow cylinder 207 of the central column. The second limit block 501 is clamped on the front end of the second tubular body to prevent the sharp needle adjustment button 107 from moving axially along the hollow cylinder 207. The needle bolt of the sharp needle 206 is sleeved on the second tubular body, so that the sharp needle adjustment button drives the sharp needle 206 to move and rotate synchronously. After the sharp needle 206 penetrates into the lower layer of the patient's conjunctiva, the handle 301 can be rotated to drive the sharp needle 206 to rotate synchronously, and the angle of the needle tip of the sharp needle 206 can be further accurately adjusted, so that the angle of the drainage tube implanted in the lower layer of the patient's conjunctiva is more accurate.

[0090] like Figure 1 As shown, a slot 106 cooperating with the handle 301 is provided on the front side wall of the housing 105. A plurality of parallel slots 106 may be provided on the housing 105 around the axis of the sharp needle, such as Figure 1The number of the handle 301 is 3, and the number of the handle 301 can also be set to 5. When the angle of the needle tip of the sharp needle 206 is determined, the handle 301 is aligned with a slot 106. The surgical operator controls the push block 103 to move toward the rear end of the housing 105, and the sharp needle rack moves synchronously, driving the sharp needle 206 to move toward the rear end of the housing 105, and the handle 301 gradually enters the corresponding slot 106. When the sharp needle 206 stops moving, the handle 301 is located at the end of the slot 106, limiting the retreat of the sharp needle 206. At this time, the drainage tube is separated from the sharp needle 206 and implanted in the subconjunctival layer of the patient.

[0091] like Figure 2 and Figure 4 As shown, the solid needle assembly includes a solid rack 202 and a solid needle 212, and the solid needle 212 is a flat-headed needle. The solid rack 202 and the sharp needle gear 215 are meshed with each other, and the solid rack 202 and the sharp needle rack are respectively located on the upper and lower sides of the sharp needle gear 215. The rotation of the sharp needle gear 215 can drive the sharp needle rack and the solid rack 202 to move in opposite directions.

[0092] The solid rack 202 comprises a toothed structure at the rear end and a cylindrical connecting block at the front end. The pintle of the solid needle 212 is sleeved on the cylindrical connecting block, and the needle stem of the solid needle 212 is located in the needle stem of the sharp needle 206.

[0093] The glaucoma drainage tube is located in the needle stem of the sharp needle 206, and the flat tip of the solid needle 212 is adjacent to the glaucoma drainage tube 301. The solid needle 212 has the same diameter as the drainage tube. The distance between the tip of the solid needle 212 and the drainage tube is selected according to the model of the sharp needle 206, the model of the solid needle 212 and the specific conditions of the patient.

[0094] During glaucoma surgery, the solid needle 212 moves forward under the push of the solid rack 202, gradually contacts the drainage tube and squeezes the drainage tube, causing the drainage tube to move forward. At the same time, the sharp needle rack moves backward, and when the first limit block 209 squeezes the base 210 of the central column, the sharp needle rack drives the sharp needle 206 to retreat, and the solid needle 212 further squeezes the drainage tube, gradually pushing the drainage tube out of the sharp needle 206. The solid needle 212 and the drainage tube are also separated from each other, and the drainage tube is implanted in the subconjunctival layer of the patient.

[0095] like Figure 2 and Figure 4 As shown, the glaucoma drainage tube implantation device also includes a blunt needle 204 for fixing a sharp needle 206. The needle bolt of the blunt needle 204 is sleeved on the blunt needle fixing seat inside the front end of the housing 105, and the sharp needle 206 is sleeved inside the blunt needle 204. The length of the blunt needle 204 is less than the length of the sharp needle 206, and the needle tip of the sharp needle 206 extends out of the needle tip of the blunt needle 204.

[0096] like Figure 2 and Figure 4As shown, the housing cover 108 is sleeved on the front end of the housing 105, and the housing cap 101 is buckled on the rear end of the housing 105. A retaining plug 205 is provided in the housing cover 108, and the needle tip of the sharp needle 206 is plug-in connected to the retaining plug 205. When the sharp needle 206 is inserted into the retaining plug 205, the needle tip of the sharp needle 206 is fixed, thereby enhancing the stability of the sharp needle 206.

[0097] like Figure 1 , Figure 2 and Figure 4 As shown, after the positioning pin 102 passes through the positioning pin hole (not shown in the figure) on the housing 105, it is fixedly connected to the pushing rack 203. The positioning pin 102 and the pushing rack 203 can be connected by bolts or clamping.

[0098] Three slide rails are arranged inside the housing 105, including a push rack slide rail 401, a solid rack slide rail 201 and a sharp pin rack slide rail 213. The push rack 203, the sharp pin rack and the solid rack 202 are connected to the push rack slide rail 401, the sharp pin rack slide rail 213 and the solid rack slide rail 201 respectively, and can slide back and forth along the push rack slide rail 401, the sharp pin rack slide rail 213 and the solid rack slide rail 201 respectively.

[0099] like Figure 1 and Figure 3 As shown, the housing 105 is formed by two parts that are snapped and connected. This design facilitates the assembly, disassembly, and replacement of internal components of the glaucoma drainage tube implant device.

[0100] When performing glaucoma surgery, the operator uses the sharp needle adjustment button 107 to precisely fine-tune the angle at which the sharp needle 206 enters the patient's subconjunctival layer, aligns the handle 301 with the appropriate slot 106, pulls out the positioning pin 102, and then manually pushes the push block 103 to slide forward along the slide slot 104, driving the push rack 203 forward. The push gear 303 and the sharp needle gear 215 both rotate clockwise, the sharp needle rack retreats and drives the sharp needle 206 backward, and the solid rack 202 drives the solid needle 212 forward. Under the combined effect of the solid needle 212 advancing and the sharp needle 206 retreating, the glaucoma drainage tube extends out and detaches from the sharp needle 206, and is implanted in the patient's subconjunctival layer.

[0101] In order to better understand the technical solution of the present invention, the following Figure 1-7 The method of using the glaucoma drainage tube implant device is described.

[0102] 1. First, cover the outer shell (see Figure 7 ) from the housing to expose the front end of the sharp needle, insert the sharp needle into the lower layer of the patient's conjunctiva, then slightly rotate the handle on the sharp needle adjustment button to accurately adjust the angle of the sharp needle tip in the lower layer of the patient's conjunctiva, and then align the handle with a slot.

[0103] 2. Remove the positioning pin (see Figure 3 ), along the chute (see Figure 1 ) pushes the push block, which moves toward the front end of the shell, drives the push rack to move toward the front end of the shell, and at the same time drives the push gear to rotate clockwise, and drives the sharp needle gear to rotate clockwise through the rotating shaft.

[0104] 3. The sharp needle gear rotates clockwise (see Figure 2 ), under the meshing action of the toothed structure on the sharp pin gear and the sharp pin rack, the sharp pin rack moves toward the rear end of the housing, the limit bar retreats, and after a period of idle travel, the first limit block contacts and squeezes the base of the center column (see Figure 6 ), driving the center column to move toward the rear end of the shell, thereby driving the sharp needle to retreat.

[0105] At the same time, as the sharp needle gear rotates clockwise (see Figure 2 ), the sharp needle gear and the solid rack mesh with each other, the solid rack moves toward the front end of the shell, driving the solid needle to move synchronously, so that the solid needle tip gradually approaches the rear end of the drainage tube, and the solid needle can contact the drainage tube before the end of the empty stroke; as the solid rack moves further, the solid needle pushes the drainage tube to move toward the sharp needle tip. Under the action of the reverse movement of the sharp needle and the solid needle, the glaucoma drainage tube detaches from the sharp needle and enters the patient's subconjunctival layer, the handle of the sharp needle adjustment button moves to the end of the card slot, and the sharp needle and the solid needle stop moving. Then pull the sharp needle out of the patient's eye, and the glaucoma drainage tube implantation surgery is completed.

[0106] 4. Push the push block to move toward the rear end of the shell (see Figure 3 ), push the rack to move toward the rear end of the shell at the same time, push the gear to rotate counterclockwise, drive the sharp needle gear to rotate counterclockwise, and move the sharp needle rack toward the front end of the shell; the sharp needle gear is meshed with the solid rack, and the solid rack moves toward the rear end of the shell, driving the solid needle to move toward the rear end of the shell. After the idle stroke, the toothed structure of the sharp needle rack squeezes the base of the center column, pushing the center column to move toward the front end of the shell, and at the same time, the sharp needle and the handle of the sharp needle adjustment button also move toward the front end of the shell. When the handle is out of the slot, the sharp needle is reset, and the solid needle is reset at the same time. At this time, the pushing block stops moving, insert the positioning pin into the pushing rack, cover the shell cover, and reset the implant device.

[0107] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A drainage tube implantation device, comprising a housing and a drainage tube moving assembly, characterized in that: The drainage tube moving assembly comprises a separately arranged pushing assembly, a sharp needle assembly and a solid needle assembly; The pushing assembly includes a pushing block, a pushing rack and a pushing gear, the sharp needle assembly includes a sharp needle gear, a sharp needle rack, a center column, a sharp needle adjustment button and a sharp needle connected in sequence, and the solid needle assembly includes a solid rack and a solid needle; The pushing assembly is connected to the sharp needle assembly through gear transmission, and the sharp needle assembly is connected to the solid needle assembly through the meshing of a gear and a rack; The central column comprises a first cylindrical body and a base, and a first groove is formed on the base; The sharp-needle rack comprises a toothed structure, a limit bar and a first limit block connected in sequence, The limiting strip passes through the first groove, and the first limiting block can contact and clamp the edge of the first groove, so that the central column is connected to the sharp-needle rack.

2. The implant device according to claim 1, characterized in that: When the pushing assembly moves back and forth, it can drive the sharp needle and the pushing block to move in opposite directions through gear transmission. At the same time, the sharp needle assembly and the solid needle assembly move in opposite directions through the transmission of gears and racks.

3. The implant device according to claim 1 or 2, characterized in that: The pushing block is fixedly connected to the pushing rack, and the pushing rack and the pushing gear are meshed with each other; The sharp pin gear and the sharp pin rack are meshed with each other, and the sharp pin gear is fixedly connected with the pushing gear and is coaxial.

4. The implant device according to claim 3, characterized in that: The gear ratio between the push gear and the sharp pin gear is greater than or equal to 1:

1.

5. The implant device according to claim 1, characterized in that: The sharp needle adjustment button comprises a handle and a second cylindrical body, wherein the handle is arranged on the outer wall of the second cylindrical body, and the second cylindrical body is connected to the first cylindrical body; One or more mutually parallel slots cooperating with the handle are provided on the front end side wall of the housing; The sharp needle is arranged in the second cylindrical body; the drainage tube is arranged in the needle stem of the sharp needle.

6. The implant device according to claim 1, characterized in that: The moving distance of the limiting strip is greater than or equal to the spacing distance between the needle tip of the solid needle and the glaucoma drainage tube.

7. The implant device according to claim 5, characterized in that: The first cylindrical body in the central column comprises a hollow cylinder at the front end and a cylinder at the rear end, the hollow cylinder and the cylinder are coaxial, and the cylinder and the base are fixedly connected or integrally formed; A second groove is provided on the hollow cylinder along the axis, and a second limiting block is arranged at the front end of the hollow cylinder.

8. The implant device according to claim 7, characterized in that: The second tubular body in the sharp needle adjustment button is sleeved on the hollow cylinder, and the second limiting block is clamped on the front end of the second tubular body.

9. The implant device according to any one of claims 1, 2, 4-8, characterized in that: The solid rack is meshed with the sharp needle gear, the needle bolt of the solid needle is sleeved on the front end of the solid rack, and the needle stem of the solid needle is located in the needle stem of the sharp needle.

10. The implant device according to claim 1 or 2, characterized in that: A slide groove is provided at the rear end of the housing, and the slide groove is a slideway for the push block to move; The implant device comprises a positioning pin, and the positioning pin passes through the shell and is fixedly connected with the pushing rack.

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