A retractable intraocular lighting electrocoagulator

Abstract

The invention discloses a retractable intraocular lighting electrocoagulator for a vitrectomy machine, the structure of which includes three parts: a front end, a handle and a tail; wherein the front end includes an intraocular optical fiber core, an intraocular optical fiber shell and an electrode slide; the handle includes a handle optical fiber core, a structure for controlling the front and rear sliding of the electrode slide, an electrocoagulation head power line and a power switch control button; the tail includes an external optical fiber core and an external power line; the optical fiber cores in the front end, the handle and the tail are optical fibers connected front and back, and the power wires in the three parts are connected in sequence. It is applied to vitrectomy surgery, and has both electrocoagulation and lighting functions, which can overcome the adverse consequences of the prior art such as delayed surgery time, untimely hemostasis, increased eye trauma, etc. due to frequent replacement of instruments.

Description

Technical Field

[0001] The invention relates to medical instruments, in particular to the structure of an illumination head and an electric coagulation head used in an ophthalmic vitrectomy machine. Background Art

[0002] The vitreous body is the largest tissue structure in the eyeball and is in a colloid state. Vitrectomy is often performed to treat some retinal diseases and vitreous diseases. The main functional components of the vitrectomy machine used in vitrectomy surgery are the lighting head, the electrocoagulation head, the vitrectomy head and the flute needle.

[0003] The structure of the lighting head mainly includes three parts: external optical fiber, gripping handle and intraocular optical fiber. Among them, the external optical fiber is made of a core covered with a flexible cladding, one end of which is connected to the light source of the vitrectomy machine, and the other end is connected to the gripping handle and connected to the intraocular optical fiber; the intraocular optical fiber is about 50mm long and 0.5mm in diameter, and is mainly composed of a core covered with a hard alloy shell. After starting, the illumination light is generated in the vitrectomy machine and introduced into the eye through two sections of optical fiber. The surgeon holds the lighting head to realize the illumination function in intraocular surgery.

[0004] The electrocoagulation head is also composed of three parts: the electrode wire, the grip handle and the intraocular electrocoagulation electrode (the intraocular electrocoagulation electrode is about 50mm long and 0.5mm in diameter). The positive and negative electrode wires pass through the handle and intersect at the tip of the electrocoagulation electrode to form a circuit. When working, the high-frequency current generates an electrothermal effect at the tip, which can coagulate small blood vessels to achieve hemostasis.

[0005] Both the lighting head and the electrocoagulation head need to be connected to a power source, and the power switch is arranged at a position convenient for foot operation, which is called a foot-operated power switch.

[0006] The structure of the vitrectomy head is composed of an air guide tube, a negative pressure suction tube, a pneumatic handle and an intraocular needle-shaped cutting head. When working, the end of the cutting head can erode the vitreous body in the eye.

[0007] The flute needle consists of a pen-shaped handle and a needle. A silicon capsule is set on the handle, and pressing the capsule can realize the blowing and suction functions of the needle tip.

[0008] When performing a vitrectomy operation, two minimally invasive operation holes are opened in the side wall of the eyeball. The lighting head is inserted into one hole, and the other hole is prepared for the alternating use of three instruments: the vitrectomy head, the electrocoagulation hemostasis head and the flute needle.

[0009] Bleeding often occurs when using a vitrectomy head to remove the organized vitreous or peel off the proliferative membrane. In this case, the vitrectomy needs to be interrupted and the vitrectomy head needs to be replaced with an electrocoagulation head to stop bleeding. If the replacement time of the instrument is a little long, blood may accumulate in the bleeding area and the bleeding point cannot be seen. In this case, the flute needle needs to be replaced to blow away the accumulated blood. After the bleeding point is clearly seen, the electrocoagulation head is inserted again to stop bleeding. In this way, the surgeon needs to use both hands during the operation. One hand (usually the left hand) continuously holds the lighting head to illuminate the intraocular space, and the other hand alternately chooses to use the vitrectomy head, electrocoagulation hemostasis head and flute needle according to the needs of the operation. The process of replacing instruments is time-consuming. Sometimes, new blood accumulates in the process of replacing instruments and the bleeding point cannot be seen, thus falling into a vicious circle.

[0010] In order to break the vicious circle mentioned above, Chinese patent application CN102525728 “Multi-purpose intraocular flute hook electrocoagulator” discloses an instrument that integrates an electrocoagulation head onto a flute needle (“flute hook” means “flute needle”), and configures the electrocoagulation head on the flute needle. When bleeding occurs, the flute needle can be used to blow away the accumulated blood and then electrocoagulate to stop bleeding. However, the use of this “flute hook electrocoagulator” still requires interrupting the vitrectomy operation, first withdrawing the vitrectomy head, and then inserting the “flute hook electrocoagulator” into the eye to stop bleeding. The operation of replacing the instrument will still delay the operation time. Moreover, the traditional flute needle is a separate free instrument that does not need to be connected to the vitrectomy machine, while this “flute hook electrocoagulator” requires the installation of a wire on the original free flute needle, thereby weakening the convenience of using the flute needle and still having the problem of reducing surgical efficiency. Summary of the invention

[0011] The purpose of the present invention is to provide a suitable component of a vitrectomy machine, which has both electrocoagulation and lighting functions. When performing a vitrectomy operation, the frequency of replacing instruments is greatly reduced, hemostasis is more timely, and the existing technology overcomes the adverse consequences of frequent instrument replacement, such as delaying the operation time and increasing eye trauma.

[0012] The present invention combines the functional components of the lighting head and the electrocoagulation head in the existing vitrectomy machine into one, which are simultaneously inserted into the eyeball when in use, occupying only one minimally invasive hole, and can perform lighting and electrocoagulation operations simultaneously, and is called a "retractable intraocular lighting electrocoagulation device."

[0013] The structure of the retractable intraocular lighting electrocoagulator of the present invention comprises three parts: a front end, a handle and a tail. When the instrument is used for surgery, the front end is inserted into the eye; the handle is for the surgeon to hold and operate; and the tail structure connects the instrument with the main body of the vitrectomy machine.

[0014] Wherein, the front end is a rod-shaped body, including an inner eye optical fiber core, an inner eye optical fiber shell and an electrode slide. The inner eye optical fiber core is a bundle of optical fibers, and the rear end is connected to the front end of the optical fiber in the handle. The inner eye optical fiber core is wrapped with a metal shell, and the metal shell is called an inner eye optical fiber shell. The rear end of the inner eye optical fiber shell is fixedly connected to the handle; the electrode slide is a component of the electrocoagulation structure, which is in the shape of a strip or a round rod, embedded in the inner eye optical fiber shell, and has the same or similar length as the inner eye optical fiber shell, and can slide back and forth. The inside of the electrode slide is set with positive and negative poles. The positive and negative poles at the far end of the electrode slide are fused into a needle-shaped electrocoagulation head tip. The proximal end of the electrode slide is connected to the telescopic slide located in the handle, and the positive and negative poles in the electrode slide are respectively connected to the positive and negative poles in the telescopic slide in the handle.

[0015] An electrode slide slot is longitudinally arranged on one side of the inner eye optical fiber shell, and the electrode slide is embedded in the electrode slide slot, and the electrode slide can slide back and forth in the electrode slide slot. When the electrocoagulation function is needed, the electrode slide is pushed by the telescopic slide rod in the handle, and the tip of the electrocoagulation head at the far end extends to the front end of the inner eye optical fiber core to implement electrocoagulation.

[0016] The handle is a round stick-shaped body that is easy to hold, and its structure includes a handle optical fiber core, a structure for controlling the forward and backward sliding of an electrode slide, an electrocoagulation head power cord, and a power switch control button.

[0017] The optical fiber core of the handle is a bundled optical fiber, the front end of which is connected with the optical fiber core of the inner eye, and the rear end is connected with the front end of the optical fiber at the tail.

[0018] The handle wall is provided with a structure for controlling the electrode slide to slide forward and backward, including a telescopic slide bar, a telescopic slide bar slot and a hand push button. The telescopic slide bar is installed in the telescopic slide bar slot, and the hand push button is connected to the end of the telescopic slide bar to control the telescopic slide bar to slide forward and backward in the telescopic slide bar slot.

[0019] The telescopic slide rod is an "L"-shaped two-section structure. The front section of the telescopic slide rod can be in the shape of a strip or a round stick, running along the longitudinal direction of the handle, and its front end is connected to the proximal end of the electrode slide. The rear section of the telescopic slide rod is in the shape of a strip, bent at a right angle to the front section, and the height of the end of the rear section of the telescopic slide rod is close to the outer wall of the handle, and is fixedly connected to the hand push button.

[0020] The telescopic slide rod slot is a three-section structure in the shape of a handlebar, which is divided into a front section, a middle section and a rear section; the front section and the rear section run longitudinally along the handle at two levels of depth and shallowness, the front section is in the deep layer, the rear section is in the shallow layer, and the middle section connects the front section and the rear section at a right angle; the front section of the telescopic slide rod slot accommodates the front section of the telescopic slide rod, and the shapes and sizes of the two are adapted; the middle section of the telescopic slide rod slot is a larger space, which accommodates the rear section of the telescopic slide rod and is suitable for the rear section of the telescopic slide rod to move forward and backward therein; the rear section of the telescopic slide rod slot accommodates the hand push button, and its shape and size are adapted to the hand push button.

[0021] The hand push button is a manual control button arranged at the top of the rear section of the slide slot, which is used to control the forward and backward sliding of the telescopic slide rod and the electrode slide sheet to realize the telescopic function of the electrocoagulation head. Its structure is that a slidable cover plate is arranged at the top of the rear section of the handle slide slot, and the hand push button is installed on the sliding cover plate. The front end of the hand push button is fixedly connected to the rear end of the telescopic slide rod.

[0022] The electrocoagulation circuit of the handle of the telescopic intraocular illumination electrocoagulator of the present invention is arranged as follows: the positive and negative power supply wires in the electrode slide at the front end are connected backward to the positive and negative power supply wires in the telescopic slide rod in the handle, travel backward along the telescopic slide rod to reach the surface of the telescopic slide rod, and form positive and negative circuit contact points; the positive and negative power supply wires from the tail are introduced into the handle, and reach the inner wall surface of the telescopic slide rod slot respectively, and form positive and negative circuit contact points; under the premise of ensuring that the telescopic slide rod can slide smoothly forward and backward in the telescopic slide rod slot, the positive and negative circuit contact points on the telescopic slide rod are contacted with the positive and negative circuit contact points on the inner wall of the telescopic slide rod slot according to the positive and negative poles, respectively, to form a complete circuit loop.

[0023] A manual control switch can be arranged on either side of the positive and negative polarity circuits in the handle. As far as the entire vitreous cutting machine is concerned, this manual control switch and the foot switch constitute a double power switch insurance.

[0024] The tail structure of the telescopic intraocular illumination electrocoagulator of the present invention comprises an external optical fiber core and an external power line. The front ends of the external optical fiber core and the external power line of the tail structure are respectively connected to the optical fiber core and the power line in the handle. The rear end of the tail structure is movably connected to the corresponding port of the vitrectomy machine.

[0025] In the above structure, the intraocular optical fiber core located at the front end, the optical fiber core located in the handle and the external optical fiber core at the rear end constitute the lighting functional components of the retractable intraocular illumination electrocoagulation device of the present invention; the electrocoagulation tip and electrode slide located at the front end, the telescopic slide rod, the hand push button and the positive and negative power lines located in the handle constitute the electrocoagulation functional components of the retractable intraocular illumination electrocoagulation device of the present invention.

[0026] When the retractable intraocular lighting electrocoagulation device of the present invention is used, the optical fiber at the rear is connected to the light source of the vitrectomy machine, and the electrode is connected to the electrocoagulation circuit of the vitrectomy machine. The front end is inserted into the eye through a minimally invasive small incision cannula (trocar) on the wall of the eyeball, which only occupies one minimally invasive hole and exerts the functions of lighting and electrocoagulation at the same time. During all the times when electrocoagulation hemostasis operation is not performed, the electrode slide embedded in the intraocular optical fiber shell is in a retracted state, which has no adverse effect on the lighting effect. When bleeding needs to be treated, the hand push button on the operating handle can extend the electrocoagulation head at the first time, and the hemostasis operation can be accurately performed under direct vision. In this process, there is no operation of changing the instrument, thereby saving operation time. In addition, because hemostasis is more timely, the amount of bleeding can be controlled, thereby reducing the frequency of using the flute needle.

[0027] The retractable intraocular illumination electrocoagulator of the present invention is compatible with the vitrectomy machine and surgical microscope widely used in ophthalmology clinics, and has strong practicality. Its circuit connection includes two switches, and the double insurance ensures that the power supply is connected as needed, and the device has high reliability. In addition, the electrocoagulation power supply wire of the present invention is accompanied by the illumination optical fiber bundle, and only a slight change is needed to the traditional path, and no other wires need to be added, which optimizes resource allocation compared with the flute needle electrocoagulation head mentioned in the background technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the appearance structure of the intraocular lighting electrocoagulation device of the present invention;

[0029] Figure 2 It is a schematic diagram of the cross-sectional structure of the front end portion of the intraocular illumination electrocoagulation device of the present invention;

[0030] Figure 3 It is a schematic diagram of the longitudinal section structure of the intraocular illumination electrocoagulation device of the present invention;

[0031] Figure 4 The utility model is a schematic diagram of the longitudinal section structure of the handle of the intraocular illumination electrocoagulation device of the present invention.

[0032] The components or parts indicated by the numbers in the figure are: 1-external optical fiber core; 2-external power supply wire; 3-handle; 4-telescopic slide groove; 5-hand push button; 6-electrode slide; 7-inner eye optical fiber shell; 8-tip of electrocoagulation head; 9-electrode slide groove; 10-inner eye optical fiber core; 11-rigid connection between telescopic slide and hand push button; 12-circuit B contact point located on the front facade of the rear section of the telescopic slide; 13-circuit A contact point located on the front inner wall of the middle section of the telescopic slide groove; 14-one of the power supply wires in the handle; 15-telescopic slide; 16-spring; 17-negative circuit D contact point located at the end of the front section of the telescopic slide; 18-circuit C contact point located on the inner wall of the telescopic slide groove; 19-two power supply wires in the handle; 20-optical fiber core of the handle. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] like Figure 1 and Figure 3 As shown, the structure of the retractable intraocular lighting electrocoagulator of the present invention includes three parts, a front end part, a handle part and a tail part, which are connected from front to back.

[0035] The front end is a rod-shaped body, including an inner eye optical fiber core 10, an inner eye optical fiber shell 7 and an electrode slide 6. Because the front end of the device is inserted into the eyeball when in use, the names of several components are all prefixed with the word "inner eye". The inner eye optical fiber core 10 is a bundle of optical fibers, and the rear end is connected to the front end of the handle optical fiber core 20. The inner eye optical fiber core 10 is wrapped with a metal shell, which is called the inner eye optical fiber shell 7. The rear end of the inner eye optical fiber shell 7 is fixedly connected to the handle 3.

[0036] like Figure 1 and Figure 2 As shown, an electrode slide slot 9 with a width of 0.2 mm is longitudinally arranged on the side wall of the inner eye optical fiber shell 7, and the electrode slide 6 is in the shape of a strip or a round rod, and its length is the same or similar to that of the inner eye optical fiber shell 7. The electrode slide 6 is embedded in the electrode slide slot 9 and can slide forward and backward along the inner eye optical fiber shell 7. The left and right sides of the electrode slide 6 are combined with the electrode slide slot 9 using a concave-convex interlocking structure. Two power supply wires are arranged inside the electrode slide 6, which are respectively the positive and negative poles of the power supply. The positive and negative poles at the far end of the electrode slide 6 are fused into a needle-shaped electrocoagulation head tip 8. The rear end of the electrode slide slot 9 is connected with the telescopic slide slot 4 in the handle 3. The rear end of the electrode slide 6 is connected with the telescopic slide 15 in the handle, and the positive and negative power supply wires in the electrode slide 6 are respectively connected with the positive and negative power supply wires in the telescopic slide 15.

[0037] like Figure 3 and Figure 4 As shown, the handle 3 of the telescopic intraocular illumination electrocoagulation device of the present invention is a round stick-shaped body that is convenient for holding. The handle 3 is equipped with a handle optical fiber core 20, a structure for controlling the forward and backward sliding of the electrode slide 6, an electrocoagulation power supply wire and a power switch.

[0038] The optical fiber core 20 of the handle part is a bundled optical fiber, the front end of which is connected to the inner optical fiber core 10, and the rear end is connected to the tail optical fiber.

[0039] like Figure 4 As shown, the structure of the handle part controlling the electrode slide to slide forward and backward includes a telescopic slide bar 15, a telescopic slide bar slot 4 and a hand push button 5. The telescopic slide bar 15 is arranged in the telescopic slide bar slot 4 and can slide forward and backward. The hand push button 5 is rigidly connected to the end of the telescopic slide bar 15.

[0040] The telescopic slide rod 15 is an "L"-shaped two-section structure. The front section can be in the shape of a strip or a round stick, running along the longitudinal direction of the handle 3, and its front end is connected to the proximal end of the electrode slide 6. The rear section of the telescopic slide rod 15 is in the shape of a strip, and is bent at a right angle to the front section of the telescopic slide rod 15. The vertical surface of the rear section of the telescopic slide rod 15 is perpendicular to the longitudinal axis of the handle 3. The end of the rear section of the telescopic slide rod 15 is close to the outer wall of the handle 3 and is fixedly connected to the hand push button 5.

[0041] The telescopic slide rod chute 4 is a three-section structure in the shape of a handle, which is divided into a front section, a middle section, and a rear section. The front section and the rear section run longitudinally along the handle 3 at two levels, deep and shallow, the front section is in the deep layer, the rear section is in the shallow layer, and the middle section is connected to the front section and the rear section at right angles. The front section of the telescopic slide rod chute 4 accommodates the front section of the telescopic slide rod 15, and the shapes and sizes of the two are adapted; the middle section of the telescopic slide rod chute 4 is a larger space, which accommodates the rear section of the telescopic slide rod 15 and is suitable for the rear section of the telescopic slide rod 15 to move forward and backward therein; the rear section of the telescopic slide rod chute 4 accommodates the hand push button 5, and its shape and size are adapted to the hand push button.

[0042] The hand push button 5 is a manual control button arranged at the top of the rear section of the telescopic slide rod slot 4, which is used to control the forward and backward sliding of the telescopic slide rod 15 and the electrode slide sheet 6, so as to realize the telescopic function of the tip 8 of the electrocoagulation head. Its structure is that an insulating and sealed slidable cover plate is arranged at the top of the rear section of the telescopic slide rod slot 4, and the hand push button 5 is installed on the sliding cover plate. The front end of the hand push button 5 is rigidly connected to the rear end of the telescopic slide rod 15.

[0043] Figure 4 The figure shows an embodiment of the electrocoagulation circuit arrangement at the handle 3. The inner wall of the front section of the telescopic slide slot 4 is made of metal conductive material or inlaid with conductive metal strips, which is connected to the second power wire 19 in the handle to form the C contact point 18 of the electrocoagulation circuit; a power wire in the telescopic slide 15 is exposed to the surface of the telescopic slide 15 when it reaches the rear end of the front section of the telescopic slide 15, forming the D contact point 17 of the electrocoagulation circuit. Among them, the C contact point 18 is set with sufficient length and width, so that when the telescopic slide 15 slides back and forth, the D contact point 17 can always keep in close contact with the C contact point 18.

[0044] A block-shaped conductor is arranged on the front inner wall of the middle section of the telescopic slide groove 4, which is connected to one of the power wires 14 in the handle 3 and is insulated from the surroundings, forming a contact point A 13 of the electrocoagulation circuit; a power wire in the telescopic slide 15 reaches the middle section of the telescopic slide 15 and is exposed to the position of the front facade of the middle section of the telescopic slide 15 corresponding to the block-shaped conductor 13, forming a contact point B 12 of the electrocoagulation circuit.

[0045] A push-pull spring 16 is provided between the front inner wall of the telescopic slide rod slot 4 and the front elevation of the middle section of the telescopic slide rod 15, so that the B contact point 12 and the A contact point 13 remain separated in the non-working state and the power is turned off.

[0046] The contact and separation of the circuit contact point A and the circuit contact point B are controlled by the push and pull of the hand push button 5 and the push and pull of the spring 16, forming a manual power switch.

[0047] The tail structure of the telescopic intraocular lighting electrocoagulator of the present invention comprises an external optical fiber core 1 and an external power supply wire 2. The tail ends of the external optical fiber core 1 and the external power supply wire 2 are connected to the host of the vitrectomy machine.

[0048] Set up Figure 4 In the circuit shown, the power supply wire 14, the A contact point 13, and the B contact point 12 are the positive circuits, and the second power supply wire 19, the C contact point 18, and the D contact point 17 are the negative circuits. Based on this setting, the circuit working principle and the method of using the telescopic intraocular illumination electrocoagulation device of the present invention are described as follows.

[0049] The power supply negative electrode D contact point 17 arranged on the side of the front rear end of the telescopic slide 15 is always in contact with the negative electrode C contact point 18 arranged on the inner wall of the telescopic slide slot 4, so that the negative electrode circuit is always connected; and the positive electrode of the power supply forms a circuit when the hand push button 5 is pushed forward, so that the positive electrode B contact point 12 on the front facade of the middle section of the telescopic slide 15 contacts the A contact point 13 on the front inner wall of the telescopic slide slot 4. At this time, the electrocoagulation head tip 8 of the electrode slide 6 extends from the front end of the inner eye optical fiber shell 7, and the positive and negative poles of the power supply circuit at the handle are connected, and the electrocoagulation system enters the working state. At this time, the power supply is started by using the foot power switch, and the electrocoagulation head tip 8 discharges, completing the cauterization and hemostasis of the bleeding area in the surgical field. When the power is turned off by the foot-operated power switch and the hand push button 5 is released, the telescopic slide rod 15 slides backward under the push of the spring 16, and the electrode slide 6 retracts into the electrode slide groove 9 of the inner optical fiber shell 7, and the positive pole B contact point 17 on the front facade of the middle section of the telescopic slide rod 15 is disengaged from the A contact point 13 on the front inner wall of the telescopic slide groove 4, the positive pole is disconnected, the circuit is interrupted, and the electrocoagulation head returns to a non-working state.

[0050] When using a vitrectomy machine to perform ophthalmic surgery, before the operation, the external optical fiber core 1 of the retractable intraocular lighting electrocoagulation device of the present invention is connected to the light source port of the vitrectomy machine, and the external power supply wire 2 is connected to the power supply port of the vitrectomy machine. The operator holds the handle 3 in one hand, places the thumb on the hand push button 5, and inserts the front end of the electrocoagulation device into the eye from the minimally invasive hole. When the hand push button 5 is in a released state, the electrode slide 6 is retracted in the intraocular optical fiber shell 7, and the device only plays a lighting function at this time. When there is bleeding in the surgical field and electrocoagulation needs to be performed, the hand push button 5 is pushed forward, and the transmission electrocoagulation head tip 8 extends from the slide groove of the intraocular optical fiber shell 7, and the spring 16 is compressed at the same time, the positive circuit B contact point 12 contacts the positive circuit A contact point 13, and the power supply is started by using the foot power switch, and the electrocoagulation head tip 8 discharges, and the bleeding of the surgical field is cauterized and hemostasis is completed, which is a one-time work flow of the electrocoagulation head. When the electrocoagulation function is not in use, the spring 16 pushes the telescopic slide rod 15 and the hand push button 5 to slide backward, driving the tip 8 of the electrocoagulation head to retract into the inner eye optical fiber housing 7, and the device enters a non-working state.

Claims

1. A retractable intraocular lighting electrocoagulator suitable for use with an ophthalmic vitrectomy machine, characterized in that: Its structure includes three parts: the front end, the handle and the tail; wherein the front end is a rod-shaped body, including an inner eye optical fiber core, an inner eye optical fiber shell and an electrode slide; the handle is a round stick-shaped body that is easy to hold, and its structure includes a handle optical fiber core, a structure for controlling the forward and backward sliding of the electrode slide, an electrocoagulation head power cord and a power switch control button; the tail includes an external optical fiber core and an external power cord; the optical fiber cores in the front end, the handle and the tail are optical fibers that are connected front to back, the power wires in the front end, the handle and the tail are connected in sequence according to the positive and negative poles, the rear end of the inner eye optical fiber shell of the front end is connected to the front end of the handle, the rear end of the tail corresponds to the corresponding port of the vitrectomy machine, and the rear end of the tail is movably connected to the corresponding port of the vitrectomy machine; The inner eye optical fiber shell at the front end is made of metal material, and the inner eye optical fiber core is wrapped in the shell. An electrode slide groove is longitudinally arranged on one side of the inner eye optical fiber shell, and a strip-shaped or round rod-shaped electrode slide is embedded in the electrode slide groove and can slide back and forth; positive and negative power supply wires are arranged inside the electrode slide, and the positive and negative power supply wires are fused into a needle-shaped electrocoagulation head tip at the distal end; A structure for controlling the extension and retraction of the electrode slide at the front end is arranged in the wall of the handle, including a telescopic slide rod, a telescopic slide rod slot and a hand push button; the proximal end of the electrode slide at the front end is connected with the front end of the telescopic slide rod located in the handle; The telescopic slide bar is wrapped with positive and negative power wires, and the front ends of the wires are respectively connected to the positive and negative power wires in the electrode slide. When the telescopic slide bar moves backward, one end of the power wire is exposed on the side of the front section of the telescopic slide bar, forming a contact point for the power wire, and the other end of the power wire is exposed on the distal surface of the middle section of the telescopic slide bar, forming another contact point for the power wire.

2. The retractable intraocular illumination electrocoagulation device according to claim 1, characterized in that: The telescopic slide rod in the handle is an "L"-shaped structure, with the front section running longitudinally along the handle, and the rear section being in the shape of a strip, bent at a right angle to the front section, the front and rear facades of the strip being perpendicular to the center axis of the handle, and the end being close to the outer wall of the handle, and fixedly connected to the hand push button.

3. The retractable intraocular illumination electrocoagulation device according to claim 1, characterized in that: The telescopic slide rod slot is a three-section structure in the shape of a handlebar, which is divided into a front section, a middle section and a rear section; the front section and the rear section run longitudinally along the handle at two levels of depth and shallowness, the front section is in the deep layer, the rear section is in the shallow layer, and the middle section connects the front section and the rear section at a right angle; the front section of the telescopic slide rod slot accommodates the front section of the telescopic slide rod, and the shapes and sizes of the two are adapted; the middle section of the telescopic slide rod slot has a space for accommodating the rear section of the telescopic slide rod and suitable for the rear section of the telescopic slide rod to move forward and backward therein; the rear section of the telescopic slide rod slot accommodates the hand push button, and its shape and size are adapted to the hand push button.

4. The retractable intraocular illumination electrocoagulation device according to claim 1, characterized in that: The positive and negative power supply wires from the tail are introduced into the handle and reach the inner wall surface of the telescopic slide rod slot respectively, forming positive and negative circuit contact points; the positive and negative circuit contact points on the inner wall of the telescopic slide rod slot correspond to the positive and negative circuit contact points on the telescopic slide rod, and the positive and negative poles are contacted respectively to form a complete circuit loop.

5. The retractable intraocular illumination electrocoagulation device according to claim 4, characterized in that: An electrode circuit contact point on the telescopic slide rod is arranged on the surface of the end of the front section of the telescopic slide rod, and a circuit contact point of the same polarity is arranged on the inner wall of the corresponding slide groove of the telescopic slide rod. The contact point is in the shape of a long strip, and the two contact points are kept in close contact when the telescopic slide rod slides forward and backward; The other polarity circuit contact point on the telescopic slide rod is arranged on the front facade of the middle section of the telescopic slide rod. A block-shaped conductor is arranged on the front inner wall of the middle section of the telescopic slide rod slot, which is connected to the other polarity power supply wire in the handle and is insulated from the surrounding area. The position corresponds to the circuit contact point on the front facade of the middle section of the telescopic slide rod. A push-pull spring is arranged between the front inner wall of the telescopic slide rod slot and the front facade of the middle section of the telescopic slide rod. The contact and separation of the circuit contact point are controlled by the push-pull action of the hand push button and the spring, forming a manual power switch.

6. The retractable intraocular illumination electrocoagulation device according to claim 5, characterized in that: The hand push button is a manual control button arranged at the top of the rear section of the telescopic slide rod slot, which is used to control the forward and backward movement of the telescopic slide rod and the electrode slide. An insulating and sealed slidable cover plate is arranged at the top of the rear section of the telescopic slide rod slot, and the hand push button is installed on the sliding cover plate. The front end of the hand push button is fixedly connected to the rear end of the telescopic slide rod.

Images