CN218106198U - Iris incision knife - Google Patents

Abstract

The utility model provides an iris incision knife, relating to the technical field of medical instruments, comprising a needle point and a hollow needle bar, wherein the needle point is connected with the front end of the needle bar, and the side wall of one end of the needle bar close to the needle point is provided with a hole; the device also comprises a cutter and a driving mechanism; the cutter and the driving mechanism are arranged in the needle rod, one end of the cutter is hinged with the inner side wall of the needle rod, and the driving mechanism is used for driving the cutter to extend out of or retract from the opening. When the device is used, the needle rod is inserted into the cornea in the direction parallel to the iris surface at the sclera edge of the side of a patient and penetrates into the cornea to reach the anterior chamber of the eye, the driving mechanism drives the cutter to rotate, the cutter extends out of the opening of the needle rod and gradually penetrates into the iris surface, after the iris is pierced, the iris incision is completed, and the intraocular pressure falls back. The operation of iris incision under the anterior chamber puncture can be rapidly and effectively finished without laser and an operating room, the pupil block is removed, the intraocular pressure is controlled, the illness state and pain of a patient are rapidly relieved, and favorable conditions are created for the later operation.

Description

iridotomy knife

technical field

The utility model relates to the technical field of medical instruments, in particular to an iridotomy knife.

Background technique

Acute angle-closure glaucoma is a type of glaucoma in which the intraocular pressure rises sharply due to the sudden large-scale closure of the chamber angle, accompanied by corresponding symptoms such as eyeball and head pain and pathological changes in the eye tissue. It is one of the common emergencies in ophthalmology. If not treated in time, it may cause irreversible damage to visual function, and even lead to blindness.

At present, the principle of laser peripheral iridectomy for glaucoma is to relieve pupillary block by communicating the anterior and posterior chambers, and it is suitable for early angle-closure glaucoma whose pathogenesis is pupillary block. Because laser peripheral iridectomy requires high corneal clarity, acute angle-closure glaucoma in the acute attack stage has obvious corneal edema due to a sharp increase in intraocular pressure, and it is difficult for the laser beam to focus on the shooting site, which often leads to laser treatment failure. In addition, the patient's cornea itself has scarring and opacity, which is also one of the reasons for the failure of laser treatment.

Utility model content

The purpose of this utility model is to provide an iridotomy knife to solve the problem that the existing laser peripheral iridotomy has higher requirements on the clarity of the cornea. Edema, the laser beam is difficult to focus on the shooting site, technical problems that often lead to laser treatment failure.

The iridotomy knife provided by the utility model comprises a needle point and a hollow needle bar, the needle point is connected to the front end of the needle bar, and an opening is arranged on the side wall of the end of the needle bar near the needle point;

The iridotomy knife also includes a cutting knife and a driving mechanism; the cutting knife and the driving mechanism are arranged inside the needle bar, one end of the cutting knife is hinged with the inner side wall of the needle bar, and the The driving mechanism is used to drive the cutting knife to protrude from the opening or retract to the inside of the needle bar.

Further, the cutter includes a cutter body and a connecting portion connected to each other;

The connecting portion is hinged to the inner side wall of the needle bar through a rotating shaft, and the driving mechanism is connected to the connecting portion for driving the cutter to rotate around the rotating shaft.

Further, when the driving mechanism drives the cutting knife to protrude from the opening and rotate around the rotating shaft to a limit position, the cutting knife is perpendicular to the needle bar.

Further, the iridotomy knife also includes a return spring, which is connected to the rotating shaft and is used to drive the cutter back to the inside of the needle bar.

Further, the driving mechanism includes a first elastic airbag, a connecting pipe and a second elastic airbag;

The first elastic airbag is arranged in the needle bar, and the first elastic airbag is connected with the cutter, and the second elastic airbag communicates with the first elastic airbag through the connecting pipe.

Further, the side of the needle bar facing away from the opening is provided with a first marking line, a second marking line and a connecting line;

The first marking line is aligned with the side of the opening close to the needle tip, the second marking line is aligned with the side of the opening away from the needle tip, and the two ends of the connecting line are respectively connected to the center of the first marking line and the second marking line.

Further, a gripping portion is provided on the circumference of the end of the needle bar away from the needle tip.

Further, the opening is rectangular.

Further, the length of the needle bar is 13-38mm, and the outer diameter of the needle bar is 0.45-0.7mm;

And/or, the length of the needle tip is 1.9-3.8 mm.

Further, the length of the cutter is 2-5 mm.

The iridotomy knife provided by the utility model includes a needle point and a hollow needle bar, the needle point is connected to the front end of the needle bar, and an opening is arranged on the side wall of the end of the needle bar near the needle point; The iridotomy knife also includes a cutting knife and a driving mechanism; the cutting knife and the driving mechanism are arranged inside the needle bar, one end of the cutting knife is hinged with the inner side wall of the needle bar, and the driving The mechanism is used to drive the cutter to protrude from the opening or retract to the inside of the needle bar.

In actual use, the head of the patient after ocular surface anesthesia is fixed in front of the slit lamp, and the needle shaft is inserted on the side of the patient (generally choose the direction of 3:00 or 9:00) at the corneoscleral limbus parallel to the iris plane. The cornea reaches the anterior chamber, the driving mechanism drives the cutter to rotate, the cutter protrudes from the opening of the needle bar, and gradually penetrates (cuts) toward the iris surface, and after the iris is pierced (full-thickness incision), the aqueous humor The iridotomy is completed by pouring from the posterior chamber into the anterior chamber. At this time, the anterior chamber deepens and the intraocular pressure drops. Then the driving mechanism drives the cutter to rotate in reverse and return to the inside of the needle bar, and finally pull out the needle bar (the corneal incision can be closed automatically), and all operations are completed. The iridotomy knife provided by this application can quickly and effectively complete the iridotomy operation under anterior chamber puncture without laser or operating room, relieve pupillary block, control intraocular pressure, and quickly relieve the patient's condition and pain. Create favorable conditions for later surgery.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some implementations of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative work.

Fig. 1 is the top view of the iridotomy knife that the utility model embodiment provides;

Fig. 2 is an enlarged view of part A in Fig. 1;

Fig. 3 is the sectional view of the iridotomy knife that the utility model embodiment provides;

Fig. 4 is the schematic diagram of the second elastic airbag extrusion of the iridotomy knife provided by the embodiment of the present invention;

Fig. 5 is the bottom view of the iridotomy knife provided by the utility model embodiment;

Fig. 6 is another form of structural diagram of the iridotomy knife provided by the embodiment of the present invention;

Fig. 7 is a schematic diagram of the implementation of the iridotomy knife provided by the embodiment of the present invention.

Icons: 100-needle point; 200-needle bar; 201-opening; 210-first marking line; 220-second marking line; 230-connecting line; 300-cutting knife; 310-knife body; 320-connecting part; 330-rotating shaft; 410-the first elastic airbag; 420-connecting pipe; 430-the second elastic airbag; 500-grip; 600-iris.

detailed description

The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Apparently, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Fig. 1 to Fig. 7, the iridotomy knife provided by the utility model includes a needle point 100 and a hollow needle bar 200, the needle point 100 is connected to the front end of the needle bar 200, and the side wall of the end of the needle bar 200 near the needle point 100 There is an opening 201 on it.

The iridotomy knife also includes a cutting knife 300 and a driving mechanism; the cutting knife 300 and the driving mechanism are arranged inside the needle bar 200, and one end of the cutting knife 300 is hinged with the inner sidewall of the needle bar 200, and the driving mechanism is used to drive the cutting knife 300 by The opening 201 protrudes or retracts to the inside of the needle bar 200 .

The iridotomy knife provided in this embodiment, in actual use, the patient's head after ocular surface anesthesia is fixed in front of the slit lamp, and the needle bar 200 is placed on the side of the patient (generally choose the direction of 3:00 or 9:00) at an angle The needle at the limbus of the sclera is inserted into the cornea parallel to the direction of the iris surface and reaches the anterior chamber. The driving mechanism drives the cutter 300 to rotate. The cutter 300 protrudes from the opening 201 of the needle bar 200 and gradually penetrates into the iris surface (cutting) , After the iris 600 is pierced (full-thickness incision), the aqueous humor flows from the posterior chamber into the anterior chamber, and the iris 600 incision is completed. At this time, the anterior chamber deepens and the intraocular pressure drops. Then the drive mechanism drives the cutter 300 to rotate in reverse and returns to the inside of the needle bar 200, and finally pulls out the needle bar 200 (the corneal incision can be closed automatically), and completes all operations. The iridotomy knife provided by this application can quickly and effectively complete the iris 600 incision operation under anterior chamber puncture without laser or operating room, relieve pupil block, control intraocular pressure, and quickly relieve the patient's condition and pain , to create favorable conditions for later surgery.

Preferably, a grip portion 500 is provided on the circumference of the end of the needle bar 200 away from the needle tip 100 .

Specifically, the handle 500 is arranged at the end of the needle bar 200 away from the needle point 100, and its size is larger than the size of the needle bar 200, which is convenient for the operator to hold. For example, when the cross section of the needle bar 200 is circular, the handle 500 The cross-section of the handle 500 can also be circular, wherein the outer diameter of the handle 500 is larger than the outer diameter of the needle shaft 200 .

Further, the cutter 300 includes a cutter body 310 and a connecting portion 320 connected to each other.

The connecting part 320 is hinged to the inner side wall of the needle bar 200 through the rotating shaft 330 , and the driving mechanism is connected to the connecting part 320 for driving the cutter 300 to rotate around the rotating shaft 330 .

Specifically, the cutter 300 includes a cutter body 310 and a connecting portion 320, the upper end of the cutter body 310 is connected to the connecting portion 320, and the connecting portion 320 is provided with a shaft hole, and the rotating shaft 330 is connected in the shaft hole, and the cutting knife 300 Hinged with the inner side wall of the needle bar 200, the driving mechanism is connected with the connecting part 320, and is used to push the connecting part 320 to rotate around the rotating shaft 330, so that the cutting knife 300 can be rotated out from the opening 201 of the needle bar 200, and can also be The connecting portion 320 is pulled to rotate around the rotating shaft 330 so that the cutter 300 can be withdrawn from the opening 201 to the inside of the needle bar 200 .

Further, when the driving mechanism drives the cutter 300 to turn out from the opening 201 , the cutter 300 is perpendicular to the needle bar 200 .

Specifically, one end of the cutting knife 300 is hinged to the inner sidewall of the needle bar 200 through the rotating shaft 330. When the driving mechanism drives the cutting knife 300 to rotate relative to the rotating shaft and protrude from the opening 201 to the inside of the needle bar 200, and rotate around the rotating shaft 330 When reaching the limit position, the cutter 300 is perpendicular to the needle bar 200 .

It should be noted that when the cutting knife 300 is rotated out, the connecting portion 320 on the cutting knife 300 can be stopped by the side of the opening 201 close to the needle tip 100, so that the cutting knife 300 can be rotated to a maximum angle of perpendicular to the needle bar 200. Location.

Further, the opening 201 is rectangular.

Specifically, the opening 201 can be a rectangle, and the length direction of the needle bar 200 is used as the long side of the rectangle. When the cutting knife 300 is retracted, it is parallel to the length direction of the needle bar 200 . The length direction is vertical.

Further, the iridotomy knife also includes a return spring, the cutter 300 is hinged to the needle bar 200 through the rotating shaft 330 , and the returning spring is connected to the rotating shaft 330 to drive the cutter 300 back to the inside of the needle bar 200 .

Specifically, a return spring may be provided on the rotating shaft 330. When the cutter 300 is rotated out of the opening 201, the cutter 300 overcomes the elastic force of the return spring, and the return spring is pulled. 201, the return spring can reset, thereby driving the cutter 300 to retract to the inside of the needle bar 200.

Further, the driving mechanism includes a first elastic airbag 410 , a connecting pipe 420 and a second elastic airbag 430 .

The first elastic airbag 410 is disposed in the needle bar 200 , and the first elastic airbag 410 is connected to the cutter 300 , and the second elastic airbag 430 communicates with the first elastic airbag 410 through the connecting pipe 420 .

Specifically, the first elastic airbag 410 is arranged inside the needle bar 200, and one end of the first elastic airbag 410 is connected to the connecting portion 320 of the cutter 300, and the second elastic airbag 430 is arranged outside, and is connected to the first elastic airbag 430 through the connecting pipe 420. An elastic airbag 410 is connected, and a certain amount of gas can be filled in the second elastic airbag 430. When the second elastic airbag 430 is squeezed, the gas flows into the first elastic airbag 410 through the connecting pipe 420, and the second elastic airbag 430 expansion, thereby pushing the cutting knife 300 to rotate counterclockwise, and the knife body 310 turns out from the opening 201 on the needle bar 200. Due to the stop effect between the connecting part 320 and the opening 201, the knife body 310 can rotate at most to the state perpendicular to the needle bar 200; when the second elastic airbag 430 is released, the gas flows back from the first elastic airbag 410 to the second elastic airbag 430, and the first elastic airbag 410 shrinks, driving the cutter 300 to rotate clockwise, and the knife body 310 Return to the inside of the needle bar 200.

It should be noted that, in this embodiment, the blade of the cutting knife 300 is arranged on the side of the knife body 310 away from the first elastic airbag 410 , and the iris 600 is cut when the knife body 310 is rotated outward.

The length of the connecting pipe 420 can also be shorter, and the user can use one hand to operate the iridotomy knife, that is, the operator can use the palm of the hand to lightly hold the balloon and the connecting pipe 420, and grasp the grip part 500 with fingers to realize one-handed iridotomy. operate.

As another implementation form of this embodiment, the length of the connecting pipe 420 can also be longer, and the second elastic airbag 430 can be placed on the ground, and the extrusion or loosening of the second elastic airbag 430 can be realized by pedal control. To realize the rotation control of the cutter 300, the operator can focus on controlling the needle bar 200 by hand, which makes the whole operation safer and more convenient.

It should be noted that the driving mechanism can also include a push rod motor and a connecting rod, wherein the connecting rod is arranged inside the needle bar, and one end of the connecting rod can be hinged with the connecting part 320, and the other end of the connecting rod can be connected with the drive of the push rod motor. The end is hinged, and the push rod motor is used to push the connecting rod so as to realize the rotation of the cutter 300 around the rotating shaft 330 as the center, so as to realize extension and retraction. Of course, other structural forms in the prior art that can realize the extension and retraction of the cutting knife 300 may also be used, and there is no limitation here.

Further, a first marking line 210 , a second marking line 220 and a connecting line 230 are provided on the side of the needle bar 200 facing away from the opening 201 .

The first marking line 210 is aligned with the side of the opening 201 close to the needle tip 100, the second marking line 220 is aligned with the side of the opening 201 away from the needle tip 100, and the two ends of the connecting line 230 are respectively connected to the first marking line 210 and the second marking line. Mark the center of line 220 .

Specifically, the first marking line 210, the second marking line 220 and the connecting line 230 can be set on the outer wall of the needle shaft 200 head end (the end near the needle point 100), the first marking line 210, the second marking line 220 and the connecting line The line 230 is provided on the back side of the opening 201 of the needle bar 200, and the extension direction of the first marking line 210 and the second marking line 220 is perpendicular to the length direction of the needle bar 200, and the connecting line 230 is parallel to the length direction of the needle bar 200. One marking line 210 corresponds to the side of the opening 201 close to the needle tip 100, the second marking line 220 corresponds to the side of the opening 201 away from the needle tip 100, and the connecting line 230 corresponds to the cutting knife 300 retracted into the needle bar 200. corresponding to the location.

Further, the length of the needle bar 200 is 13-38 mm, and the outer diameter of the needle bar 200 is 0.45-0.7 mm; and/or, the length of the needle tip 100 is 1.9-3.8 mm.

Further, the length of the cutter 300 is 2-5mm.

Specifically, in this embodiment, the total length of the needle bar 200 can be between 13-38mm; the length of the needle tip 100 should be between 1.9-3.8mm; the outer diameter of the needle bar 200 can be between 0.45-0.7mm, and the The length of the needle bar 200 in the atrium should be between 2-5mm; theoretically, the larger the diameter of the needle bar 200, the longer the needle point 100; Rod 200 length.

It should be noted that the size of the handle end and the needle bar 200 can also refer to the size of the needle of a conventional disposable syringe. The smaller the size of the needle bar 200, the smaller the incision in the operation; the smaller the size of the needle bar 200, the finer the design inside the needle bar 200, and the difficulty of production increases. In practice, it is necessary to select a needle of an appropriate size after comprehensive consideration Rod 200.

It should be noted that, in this embodiment, the needle tip 100 is a solid conical structure.

In this embodiment, before the operation, the head of the patient after ocular surface anesthesia was fixed in front of the slit lamp. The operator's one hand needs to adjust the position of the slit lamp in time to keep the patient's operative eye in a visible state during the operation (operation), and the other hand can operate the iridotomy knife. The operator holds the second elastic airbag 430 and the connecting pipe 420 lightly in the palm of his hand, grasps the upper hand-held end of the needle bar 200 with his fingers, so that the connecting line 230 on the needle bar 200 is kept facing the operator or visible to the operator during operation, and is easy to see for the patient. Lateral (generally choose 3:00 or 9:00 direction) at the corneoscleral limbus parallel to the direction of the iris plane (the risk of accidental damage to the corneal endothelium or iris 600 by the needle tip 100 during the operation is minimized) the needle is inserted into the cornea and reaches the anterior chamber After the first marking line 210 and the second marking line 220 both enter the anterior chamber, the palm of the hand slowly squeezes the second elastic air bag 430, the gas flows into the first elastic air bag 410 in the needle bar 200, and the first elastic air bag 410 The head end gradually expands, and with the help of the rotating shaft 330, the cutter 300 is driven to rotate counterclockwise. The cutter body 310 turns out from the opening 201 of the needle bar 200, and the blade at the front end of the cutter body 310 gradually penetrates (cuts) the iris surface. After the iris 600 is pierced (full-thickness incision), it can be seen that the aqueous humor flows from the posterior chamber into the anterior chamber, and the iris 600 incision is completed. At this time, the anterior chamber deepens and the intraocular pressure drops. Then the palm of the hand relaxes the second elastic airbag 430 so that the gas flows back from the first elastic airbag 410 to the second elastic airbag 430, the head end of the first elastic airbag 410 retracts, and with the help of the rotating shaft 330, the cutting knife 300 is driven to rotate clockwise, and the knife body 310 retracts into the needle bar 200. Finally, the needle bar 200 is pulled out (the corneal incision can be closed automatically), and all operations are completed.

First of all, for the acute onset of acute angle-closure glaucoma, the sharp increase in intraocular pressure causes significant corneal edema, and the laser beam is difficult to focus on the shooting site; or the patient's cornea itself has scars and turbidity; all of the above can easily lead to laser peripheral iridectomy. fail. The iridotomy knife provided in this embodiment can be used as an alternative to laser peripheral iridotomy.

In addition, in patients with emergencies such as pupillary block glaucoma, the effect of drug treatment (lowering intraocular pressure, dilating pupils) is often unsatisfactory. situation, only using limited equipment (the iridotomy provided by the application under the assistance of a slit lamp), without laser and operating room, the task of iridotomy under anterior chamber puncture can be quickly and effectively completed, and the pupillary obstruction can be relieved. Hysteresis, control intraocular pressure, quickly relieve the patient's condition and pain, and create favorable conditions for later surgery.

In summary, the iridotomy knife provided by the utility model includes a needle point 100 and a hollow needle bar 200, the needle point 100 is connected to the front end of the needle bar 200, and the side wall of the needle bar 200 near the needle point 100 is provided with an opening. Hole 201; The iridotomy knife also includes a cutting knife 300 and a driving mechanism; The cutting knife 300 and the driving mechanism are arranged inside the needle bar 200, and one end of the cutting knife 300 is hinged with the inner side wall of the needle bar 200, and the driving mechanism is used to drive the cutting knife. The knife 300 protrudes from the opening 201 or retracts to the inside of the needle bar 200 . In actual use, the head of the patient after ocular surface anesthesia is fixed in front of the slit lamp, and the needle bar 200 is inserted on the side of the patient (generally choose the direction of 3:00 or 9:00) at the corneoscleral limbus parallel to the iris plane. Enter the cornea and reach the anterior chamber, the driving mechanism drives the cutter 300 to rotate, the cutter 300 rotates out from the opening 201 of the needle bar 200, and gradually penetrates (cuts) towards the iris surface, and waits to be pierced (full-thickness incision) After the iris is 600 degrees, the aqueous humor flows from the posterior chamber into the anterior chamber, completing the iris 600 incision. At this time, the anterior chamber deepens and the intraocular pressure drops. Then the drive mechanism drives the cutter 300 to rotate in reverse and returns to the inside of the needle bar 200, and finally pulls out the needle bar 200 (the corneal incision can be closed automatically), and completes all operations. The iridotomy knife provided by this application can quickly and effectively complete the iris 600 incision operation under anterior chamber puncture without laser or operating room, relieve pupil block, control intraocular pressure, and quickly relieve the patient's condition and pain , to create favorable conditions for later surgery.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the various embodiments of the present invention Scope of technical solutions.

Claims (10)

1. A kind of iridotomy knife, comprise needle point and hollow needle bar, described needle point is connected at the front end of described needle bar, it is characterized in that, described needle bar is provided with opening on the sidewall near one end of described needle point hole; The iridotomy knife also includes a cutting knife and a driving mechanism; the cutting knife and the driving mechanism are arranged inside the needle bar, one end of the cutting knife is hinged with the inner side wall of the needle bar, and the The driving mechanism is used to drive the cutting knife to protrude from the opening or retract to the inside of the needle bar. 2. The iridotomy knife according to claim 1, characterized in that, the cutting knife comprises a cutter body and a connecting portion connected to each other; The connecting portion is hinged to the inner side wall of the needle bar through a rotating shaft, and the driving mechanism is connected to the connecting portion for driving the cutter to rotate around the rotating shaft. 3. The iridotomy knife according to claim 2, characterized in that, when the driving mechanism drives the cutting knife to protrude from the opening and rotate around the shaft to a limit position, the The cutter is perpendicular to the needle bar. 4. The iridotomy knife according to claim 2, characterized in that, the iridotomy knife also includes a return spring connected to the rotating shaft for driving the cutter back to the Inside the needle bar. 5. The iridotomy knife according to claim 1, characterized in that, the drive mechanism comprises a first elastic air bag, a connecting pipe and a second elastic air bag; The first elastic airbag is arranged in the needle bar, and the first elastic airbag is connected with the cutter, and the second elastic airbag communicates with the first elastic airbag through the connecting pipe. 6. The iridotomy knife according to claim 1, wherein a first marking line, a second marking line and a connecting line are provided on the side of the needle bar facing away from the opening; The first marking line is aligned with the side of the opening close to the needle tip, the second marking line is aligned with the side of the opening away from the needle tip, and the two ends of the connecting line are respectively connected to the center of the first marking line and the second marking line. 7 . The iridotomy knife according to claim 1 , wherein a gripping portion is provided on the circumference of the end of the needle bar away from the needle tip. 7 . 8. The iridotomy knife according to claim 1, wherein the opening is rectangular. 9. The iridotomy knife according to claim 1, characterized in that, the length of the needle bar is 13-38 mm, and the outer diameter of the needle bar is 0.45-0.7 mm; And/or, the length of the needle tip is 1.9-3.8 mm. 10. The iridotomy knife according to claim 1, characterized in that, the length of the cutting knife is 2-5 mm.

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