CN218943685U - ophthalmic surgery needle - Google Patents

Abstract

The utility model provides a flute needle for ophthalmic surgery, which comprises a probe hard tube, a probe hose, a handle and a deformation switch, wherein: the probe hard tube and the probe hose have a common central shaft, and the outer diameter of the probe hose is smaller than that of the probe hard tube; the rear end of the probe hose is connected with the front end of the probe hard tube; the handle is connected with the rear end of the probe hard tube; the deformation switch is connected with the probe hard tube, the hardness of the deformation switch is larger than that of the probe hose, the deformation switch can be switched between a first state and a second state under the action of external force, the outer wall and the front end face of the probe hose can be surrounded by the deformation switch in the first state, and the outer wall and the front end face of the probe hose are exposed out of the deformation switch in the second state.

Description

ophthalmic surgery needle

technical field

The utility model relates to the technical field of medical instruments, in particular to a flute needle for ophthalmic surgery.

Background technique

In ophthalmic surgery, a flute needle is used in the scene where fluid drainage is required. The flute needle has a very thin diameter so that it has a capillary siphon effect, and there is a small hole in the handle. When operating, the finger presses the small hole from time to time, just like playing a flute. Specifically: after the tip of the flute needle is inserted into the eye, the finger moves away from the small hole, and the liquid in the eye flows out through the small hole at the tip; when the finger presses the small hole, the liquid in the eye stops flowing out. This needle is used to release subretinal fluid through the eye, suck out fresh blood on the retinal surface, gas/liquid exchange and silicone oil replacement, etc. The needle body of the flute needle usually adopts a composite form in which a probe hose is arranged at the head of the hard tube of the probe, as shown in Figure 1 and Figure 2.

Trocars are generally used in the fundus surgery process. The function of the trocar is to make the intraocular surgical instruments pass through and take out smoothly. When the intraocular surgical instruments are taken out, the trocar is equipped with a one-way valve to ensure that the eye intraocular pressure. When a one-way valve is installed in the trocar, the probe head of the flute needle is a flexible tube that will be blocked by the one-way valve of the trocar. .

Patent CN211023471U proposes a flute needle for ophthalmic surgery. After the probe head hard tube of the flute needle passes through the one-way valve of the trocar, the flute needle realizes the hardening of the probe head by the rebound force of the spring. The tube is automatically retracted, and then the flexible tube of the probe head using the flute needle can enter the trocar and perform intraocular surgery while avoiding the hard tube from causing damage to the intraocular tissue. However, the flute needle needs to be provided with components such as a sliding shaft, a sliding block and a spring, and the internal structure is relatively complicated, which is not conducive to processing, and the manufacturing cost is relatively high.

Utility model content

In view of this, the utility model aims to provide a flute needle for ophthalmic surgery with simple structure, easy use and low cost. Other purposes and effects of the utility model can be drawn from the specific implementation manners.

The flute needle for ophthalmic surgery according to the embodiment of the utility model includes: a probe hard tube, a probe hose, a handle and a deformation switch, wherein: the probe hard tube and the probe hose have a common central axis, The outer diameter of the probe hose is smaller than the outer diameter of the probe hard tube; the rear end of the probe hose is connected to the front end of the probe hard tube; the handle is connected to the probe hard tube The rear end is connected; the deformation switch is connected with the probe hard tube, the hardness of the deformation switch is greater than the hardness of the probe hose, and the deformation switch can be in the first shape and the second shape under the action of an external force. Switching between forms, wherein in the first form the deformable switch is capable of surrounding the outer wall and front end of the probe hose and in the second form the outer wall and front end of the probe hose exposed to the deformation switch.

Optionally, the deformation switch is made of TC4 titanium alloy.

Optionally, the deformation switch is composed of N identical shrapnels in the form of lotus petals, N is a natural number, and the first end of each shrapnel is connected to the outer wall of the hard tube of the probe; In one form, the second end of each shrapnel is located in front of the first end, and the N second ends gather together to surround the outer wall and front end of the probe hose; in the second form Next, the second end of each elastic piece is located behind the first end, and the N second ends are separated from each other and attached to the outer wall of the probe hard tube.

Optionally, the value of N is 2-4.

Optionally, the length of the shrapnel is 1.5 to 2.5 times the length of the probe hose.

Optionally, the length of the elastic piece is 3mm to 5mm.

Optionally, the thickness of the elastic sheet is 0.1 mm to 0.3 mm.

Optionally, the elastic piece has a width of 0.5 mm to 2 mm.

Optionally, the distance from the first end of the elastic piece to the front end of the probe hard tube is 0.3 mm to 1.5 mm.

Optionally, the first end is connected to the outer wall of the hard tube of the probe in a non-rigid connection.

The flute needle for ophthalmic surgery of the utility model has a deformation switch, and the deformation switch can protect the probe hose outside the eye in the first form, and can facilitate the probe hose to enter the eye smoothly in the second form. It has the advantages of simple structure, easy to use, and low cost.

Description of drawings

The accompanying drawings are used to better understand the utility model, and do not constitute an improper limitation of the utility model. in:

Fig. 1 is the overall schematic diagram of the ophthalmic surgery flute needle of prior art;

Fig. 2 is a partially enlarged view of the box position in Fig. 1;

Fig. 3 is the overall schematic diagram of the flute needle for ophthalmic surgery according to the embodiment of the present invention;

Fig. 4 is a partial cutaway schematic diagram of the first form of the flute needle for ophthalmic surgery according to the embodiment of the present invention;

Fig. 5 is a partial side view of the first form of the flute needle for ophthalmic surgery according to the embodiment of the present invention;

Fig. 6 is a partial cross-sectional schematic diagram of the first form of the flute needle for ophthalmic surgery according to the embodiment of the present invention;

Fig. 7 is a partially cutaway schematic diagram of the second form of the flute needle for ophthalmic surgery according to the embodiment of the present invention.

In the figure, 1-probe hard tube; 2-probe hose; 3-handle; 4-deformation switch; 41-shrapnel.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

In this utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature "before" or "behind" the second feature may include direct contact between the first and second features, and may also include the first and second features. The features are not in direct contact but through another feature between them. Moreover, "before", "front" and "front" of the first feature include the first feature directly in front of the second feature and obliquely in front of the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "behind", "rear" and "behind" the second feature includes the first feature being directly in front and obliquely in front of the second feature, or simply means that the level of the first feature is smaller than that of the second feature.

In the description of the present utility model, the direction away from the handle is defined as "front", and the direction close to the handle is "rear", that is, the left direction in each drawing is "front", and the right direction is "rear".

As shown in FIG. 3 , the flute needle for ophthalmic surgery according to the embodiment of the present utility model mainly includes: a hard probe tube 1 , a flexible probe tube 2 ; a handle 3 and a deformation switch 4 . Wherein, the hard probe tube 1 and the soft probe tube 2 have a common central axis, and the outer diameter of the soft probe tube 2 is smaller than that of the hard probe tube 1 . The rear end of the probe hose 2 is connected with the front end of the probe hard tube 1 , and the handle 3 is connected with the rear end of the probe hard tube 1 . The deformation switch 4 is connected with the probe hard tube 1 . The hardness of the deformation switch 4 is greater than that of the probe hose 2 . The deformation switch 4 can be switched between the first form and the second form under the action of external force, wherein the deformation switch 4 can surround the outer wall and the front end surface of the probe hose 2 in the first form, and the probe hose 2 can be surrounded by the probe in the second form. The outer wall and front end surface of the hose 2 are exposed outside the deformation switch 4 . In addition, the flute needle used in ophthalmic surgery is usually connected with a negative pressure drainage tube (not shown in the figure). Can.

The above-mentioned external force causing the deformation of the deformation switch 4 may be the force exerted by other medical devices on the deformation switch when the flute needle is used in conjunction with other medical devices. The external force can be flexibly designed for the application location, direction and size of the deformation switch 4 . For example, the deformation switch of the first form may switch to the second form when receiving a backward force; and the deformation switch of the second form may switch back to the first form when receiving a forward force.

The deformation switch 4 can be made of TC4 titanium alloy, which has the advantages of easy processing, low cost and quick deformation operation.

The deformation switch 4 may be composed of N identical shrapnels 41 in the form of lotus petals, wherein N is a natural number. The first end of each elastic piece 41 is connected with the outer wall of the hard probe tube 1 . In the first form, the second end of each shrapnel 41 is located in front of the first end, and the N second ends gather together to surround the outer wall and front end of the probe hose 2; in the second form, each The second end of the elastic piece 41 is located behind the first end, and the N second ends are separated from each other and attached to the outer wall of the hard probe tube 1 . Preferably, the value of N is 2-4. When the value of N is too large, it is not easy to manufacture the deformation switch.

4 to 7 are schematic diagrams of the flute needle for ophthalmic surgery according to the embodiment of the present invention. The deformation switch 4 of the flute needle includes two shrapnels. The two shrapnels 41 have the same shape and are located opposite to each other. In order to better highlight the key points, the front part of the flute needle is mainly shown in FIGS. 4 to 7 , and the rear part of the probe hard tube 2 and the handle 3 are omitted.

In the first form of the flute needle, as shown in FIGS. 4 to 6, the first end of each elastic piece 41 (ie, the right end of the elastic piece 41 in FIGS. 4-6 ) is located at a rearward position, and the first end is fixed on the probe On the outer wall of the hard tube 1. The second end of each elastic piece (ie, the left end of the elastic piece 41 in FIGS. 4-6 ) is located in front of the first end. The second ends of the two shrapnels 41 converge forward together to surround the outer wall and the front end of the probe hose 2 and protect the probe hose 2 .

The flute needle is in the second configuration as shown in FIG. 7 , and the second end of each shrapnel 41 (ie, the right end of the shrapnel 41 in FIG. 7 ) is located behind the first end (ie, the left end of the shrapnel 41 in FIG. 7 ). The second ends of the two elastic pieces 41 are separated from each other and attached to the outer wall of the hard probe tube 1 , that is to say, the outer wall and the front end of the probe hose 2 are exposed, so that the probe hose 2 can absorb liquid.

In the flute needle for ophthalmic surgery according to the embodiment of the present utility model, the length of the shrapnel 41 is preferably 1.5 to 2.5 times the length of the probe hose 2 . If the length of the elastic piece 41 is too short, it is difficult for the elastic piece 41 to surround the side wall and the front end of the probe hose 2 smoothly in the first form; if the length of the elastic piece 41 is too long, the volume of the elastic piece 41 is large, the amount of material used is large, and the cost increases .

In the flute needle for ophthalmic surgery according to the embodiment of the utility model, the length of the elastic piece 41 is preferably 3mm to 5mm, the thickness of the elastic piece 41 is preferably 0.1mm to 0.3mm, and the width of the elastic piece 41 is preferably 0.5mm to 2mm. The shrapnel of this size can better match the hard probe tube 1 and the probe hose 2 of a conventional flute needle.

In the flute needle for ophthalmic surgery according to the embodiment of the utility model, the distance from the first end of the shrapnel to the front end of the hard tube of the probe is 0.3 mm to 1.5 mm. If the distance is too short, the shrapnel will not be firmly fixed; if the distance is too far, the second end of the shrapnel will hardly cover the probe hose in the first form.

In the flute needle for ophthalmic surgery according to the embodiment of the utility model, the first end is connected to the outer wall of the hard tube of the probe in a non-rigid connection. In the field of mechanics, a rigid connection refers to a connection method that cannot be rotated after connection and can withstand bending moments and other tensile pressures, such as welding. Therefore, the first end of the shrapnel and the outer wall of the hard tube of the probe are not suitable for rigid connection, but suitable for non-rigid connection.

The utility model also provides an operation method of the flute needle used in ophthalmic surgery. An exemplary operation scene is that the flute needle is inserted into the sclera incision to suck liquid under the cooperation of the trocar. details as follows:

Step 1: Provide the flute needle according to the embodiment of the utility model. At this time, the deformation switch is in the first form, that is, the hard deformation switch (shrapnel) before formal use protects the probe hose.

Step 2: A trocar is placed in the patient's eye incision. The trocar is a common medical device in minimally invasive surgery. Its shape is a small tube. Its smooth cylindrical outer wall is used to open the eye incision, and the through hole inside it can facilitate the entry and exit of the needle. The size of the trocar needs to match the size of the flute needle. Specifically: on the one hand, the inner diameter of the trocar should be larger than the outer diameter of the probe hose to ensure that the probe hose can be inserted therethrough; on the other hand, the inner diameter of the trocar should be smaller than the outer diameter of the deformation switch to ensure that the deformation switch cannot be inserted therethrough . Preferably, the inner diameter of the trocar is 1 mm to 2 mm smaller than the outer diameter of the deformation switch.

Step 3: In order to insert the flute needle into the eye, the flute needle needs to be aligned with the through hole of the trocar and pushed forward. When the diameter of the deformation switch exceeds the inner diameter part of the trocar (that is, the outer peripheral part of the second end of the shrapnel) hits the trocar, since the trocar is located in front of the deformation switch, the trocar will apply force to the deformation switch of the flute needle at this time. The backward first force causes the deformation switch to change from the first shape to the second shape, and then exposes the probe tube, which facilitates the probe tube to reach the suction point in the patient's eye.

Step 4: Connect the flute needle to the negative pressure drainage tube, so the probe hose starts to suck the liquid from the suction point until the suction ends.

Step 5: In order to pull the flute needle out of the eye, the flute needle needs to be pulled back through the through hole of the trocar. When the diameter of the deformation switch exceeds the inner diameter part of the trocar (that is, the outer peripheral part of the second end of the shrapnel) touches the trocar, since the trocar is located behind the deformation switch, the trocar will give the deformation switch of the flute needle at this time. Applying the second forward force causes the deformation switch to change from the second form to the first form, and then surrounds the probe tube again, and again plays the role of protecting the probe tube outside the eye.

In summary, the flute needle for ophthalmic surgery of the present utility model has a deformation switch, which can protect the probe hose outside the eye in the first form; switch to the second form in the first form When it is in the second form, it can facilitate the probe hose to penetrate the trocar and enter the eye; in the second form, it can facilitate the full exposure of the probe hose to ensure the smooth progress of the operation. It has the advantages of simple structure, easy use, and low cost. Etc.

The above specific implementation methods do not constitute a limitation to the protection scope of the present utility model. It should be apparent to those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims (10)

1. The utility model provides a flute needle for ophthalmic surgery which characterized in that includes probe hard tube, probe hose, handle and deformation switch, wherein:

the probe hard tube and the probe hose have a common central shaft, and the outer diameter of the probe hose is smaller than that of the probe hard tube;

the rear end of the probe hose is connected with the front end of the probe hard tube;

the handle is connected with the rear end of the probe hard tube;

the deformation switch is connected with the probe hard tube, the hardness of the deformation switch is larger than that of the probe hose, the deformation switch can be switched between a first state and a second state under the action of external force, the outer wall and the front end face of the probe hose can be surrounded by the deformation switch in the first state, and the outer wall and the front end face of the probe hose are exposed out of the deformation switch in the second state.

2. The flute needle for ophthalmic surgery of claim 1, wherein the deformation switch is made of TC4 titanium alloy.

3. The flute needle for ophthalmic surgery according to claim 1 or 2, characterized in that said deformation switch consists of N identical elastic pieces in the form of lotus leaf combinations, N being a natural number, the first end of each elastic piece being connected to the outer wall of the rigid tube of the probe;

in the first form, the second end of each spring piece is positioned in front of the first end, and N second ends are gathered together to surround the outer wall and the front end face of the probe hose;

in the second state, the second end of each spring is located behind the first end, and the N second ends are separated from each other and attached to the outer wall of the probe hard tube.

4. A flute needle for ophthalmic surgery according to claim 3, wherein N has a value of 2 to 4.

5. A flute needle for ophthalmic surgery according to claim 3, wherein the length of the shrapnel is 1.5 to 2.5 times the length of the probe hose.

6. A flute needle for ophthalmic surgery according to claim 3, wherein the length of the spring sheet is 3mm to 5mm.

7. A flute needle for ophthalmic surgery according to claim 3, wherein the thickness of the elastic sheet is 0.1mm to 0.3mm.

8. A flute needle for ophthalmic surgery according to claim 3, wherein the width of the spring sheet is 0.5mm to 2mm.

9. A flute needle for ophthalmic surgery according to claim 3, wherein the distance from the first end of the elastic sheet to the front end face of the rigid tube of the probe is 0.3mm to 1.5mm.

10. An ophthalmic surgical flute needle according to claim 3, wherein the first end is connected to the outer wall of the probe stiffening tube in a non-rigid manner.

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