CN218943685U - Flute needle for ophthalmic surgery - Google Patents
Flute needle for ophthalmic surgery Download PDFInfo
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- CN218943685U CN218943685U CN202223525307.2U CN202223525307U CN218943685U CN 218943685 U CN218943685 U CN 218943685U CN 202223525307 U CN202223525307 U CN 202223525307U CN 218943685 U CN218943685 U CN 218943685U
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- probe
- hose
- hard tube
- flute needle
- deformation switch
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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
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a flute needle for ophthalmic surgery.
Background
The liquid drainage scene in the ophthalmic surgery can be a flute needle, the caliber of the flute needle is very thin, so that the flute needle has capillary siphon action, and the handle of the flute needle is provided with a small hole, so that the small hole is pressed when the finger is operated, and the flute needle is like a flute. Specifically: after the flute needle head end is inserted into the eye, the finger moves away from the small hole, and the liquid in the eye flows out of the small hole through the head end pipeline; when the finger presses against the aperture, the intraocular fluid no longer flows out. The needle is used for discharging subretinal fluid through eyes, sucking fresh blood on the surface of retina, exchanging gas/liquid, replacing silicone oil, and the like. The body of the flute needle generally takes the form of a composite of a probe hose disposed on the head of a hard probe tube, as shown in fig. 1 and 2.
A trocar is commonly used in the fundus operation process, and the trocar has the function of enabling an intraocular surgical instrument to be taken out smoothly, and a one-way valve is arranged on the trocar when the intraocular surgical instrument is taken out, so that intraocular pressure in the eye is ensured. When the one-way valve is arranged in the trocar, the probe head of the flute needle is blocked by the one-way valve of the trocar, the probe head hose of the flute needle is difficult to smoothly penetrate the trocar, and the operation cannot be performed.
Patent CN211023471U proposes a flute needle for ophthalmic surgery, and this flute needle is through passing through the check valve of trocar with the probe head hard tube of flute needle earlier, and the rethread spring rebound force of rethread spring realizes that the probe head hard tube is automatic withdraws, and then uses the probe head hose of flute needle can enter into the trocar and carry out the intraocular surgery, avoids the hard tube to cause the injury to intraocular tissue simultaneously. However, the flute needle is required to be provided with a sliding shaft, a sliding block, a spring and other parts, the internal structure is complex, the processing is not facilitated, and the manufacturing cost is high.
Disclosure of Invention
In view of the above, the present utility model aims to provide a flute needle for ophthalmic surgery, which has a simple structure, is easy to use and has low cost. Other objects and effects of the present utility model can be derived from the detailed description.
An ophthalmic surgical flute needle according to an embodiment of the present utility model 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.
Alternatively, the deformation switch is made of TC4 titanium alloy.
Optionally, the deformation switch is composed of N identical elastic pieces in lotus petal combination, N is a natural number, and a first end of each elastic piece is connected with the outer wall of the probe hard tube; 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.
Optionally, the value of N is 2 to 4.
Optionally, the length of the elastic sheet is 1.5 to 2.5 times the length of the probe hose.
Optionally, the length of the elastic sheet is 3mm to 5mm.
Optionally, the thickness of the elastic sheet is 0.1mm to 0.3mm.
Optionally, the width of the elastic sheet is 0.5mm to 2mm.
Optionally, the distance from the first end of the elastic piece to the front end face of the probe hard tube is 0.3mm to 1.5mm.
Optionally, the first end is connected to the outer wall of the probe wand in a non-rigid manner.
The flute needle for the ophthalmic surgery has the deformation switch, the deformation switch can play a role in protecting the probe hose outside the eye in the first mode, and the probe hose can be conveniently and smoothly inserted into the eye to finish the surgery in the second mode, so that the flute needle has the advantages of simple structure, easiness in use, lower cost and the like.
Drawings
The drawings are included to provide a better understanding of the utility model and are not to be construed as unduly limiting the utility model. Wherein:
FIG. 1 is an overall schematic of a prior art ophthalmic surgical flute needle;
FIG. 2 is an enlarged partial view of the block location of FIG. 1;
FIG. 3 is an overall schematic view of an ophthalmic surgical flute needle according to an embodiment of the present utility model;
FIG. 4 is a schematic partial cutaway view of a first aspect of an ophthalmic surgical flute needle according to an embodiment of the present utility model;
FIG. 5 is a partial side schematic view of a first aspect of an ophthalmic surgical flute needle according to an embodiment of the present utility model;
FIG. 6 is a schematic partial cross-sectional view of a first aspect of an ophthalmic flute needle according to an embodiment of the present utility model;
fig. 7 is a partially cut-away schematic illustration of a second aspect of an ophthalmic flute needle according to an embodiment of the present utility model.
In the figure, 1-probe hard tube; 2-probe hose; 3-a handle; 4-a deformation switch; 41-shrapnel.
Detailed Description
The utility model is further described below with reference to the drawings and the detailed description, but is not intended to be limiting.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "before" or "after" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, the "front", "forward" and "forward" of a first feature relative to a second feature includes the first feature being directly forward and obliquely forward of the second feature, or simply indicates that the first feature is higher in horizontal height than the second feature. The first feature "after", "behind" and "rear" the second feature includes the first feature being directly in front of and diagonally in front of the second feature, or simply indicates that the first feature is less level than the second feature.
In the description of the present utility model, the direction away from the handle is defined as "front", the direction close to the handle is defined as "rear", i.e., the left direction in each drawing is defined as "front", and the right direction is defined as "rear".
As shown in fig. 3, the flute needle for ophthalmic surgery according to the embodiment of the present utility model mainly includes: a probe hard tube 1 and a probe soft tube 2; handle 3 and deformation switch 4. Wherein the probe hard tube 1 and the probe hose 2 have a common central axis, and the outer diameter of the probe hose 2 is smaller than the outer diameter of the probe hard 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 is switchable under the influence of an external force between a first configuration in which the deformation switch 4 is capable of surrounding the outer wall and the front end face of the probe tube 2, and a second configuration in which the outer wall and the front end face of the probe tube 2 are exposed to the outside of the deformation switch 4. In addition, the flute needle for ophthalmic surgery is usually externally connected with a negative pressure drainage tube (not shown in the figure), and the specific connection modes are various, and only the communication of the negative pressure drainage tube, a probe hose and a probe hard tube is required.
The external force for inducing the deformation of the deformation switch 4 may be the acting force applied to the deformation switch by other medical instruments when the flute needle is matched with the other medical instruments. The external force can be designed flexibly for the application position, direction and size of the deformation switch 4. For example, the deformation switch, which may be in a first configuration, switches to a second configuration when subjected to a rearward force; and the deformation switch of the second configuration switches back to the first configuration when subjected to a forward force.
The deformation switch 4 can be made of TC4 titanium alloy, and the material has the advantages of easiness in processing, low cost and agility in deformation operation.
The deformation switch 4 may be composed of N identical elastic pieces 41 in lotus leaf combinations, where N is a natural number. The first end of each spring 41 is connected to the outer wall of the probe hard tube 1. In the first configuration, the second end of each elastic piece 41 is located in front of the first end, and the N second ends are gathered together to surround the outer wall and the front end face of the probe hose 2; in the second state, the second end of each spring 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 probe stiffener 1. Preferably, N has a value of 2 to 4. When the value of N is too large, the deformation switch is not easy to process and manufacture.
Fig. 4 to 7 are schematic views of an ophthalmic surgical flute needle according to an embodiment of the present utility model, and the deformation switch 4 of the flute needle includes two elastic pieces, and the two elastic pieces 41 have the same shape and are disposed oppositely. For better emphasis, the front part of the flute needle is mainly presented in fig. 4 to 7, the rear part of the probe stiffening tube 2 and the handle 3 being omitted.
In the first configuration, as shown in fig. 4 to 6, the first end of each spring 41 (i.e. the right end of the spring 41 in fig. 4 to 6) is located at a rear position, and the first end is fixed to the outer wall of the hard tube 1. The second end of each spring (i.e., the left end of spring 41 in fig. 4-6) is forward of the first end. The second ends of the two elastic pieces 41 are jointly gathered forward, and enclose the outer wall and the front end face of the probe hose 2, thereby playing a role in protecting the probe hose 2.
In the second configuration, as shown in fig. 7, the second end of each spring 41 (i.e., the right end of the spring 41 in fig. 7) is located behind the first end (i.e., the left end of the spring 41 in fig. 7). The second ends of the two elastic pieces 41 are dispersed and attached to the outer wall of the probe hard tube 1, that is, the outer wall and the front end face of the probe hose 2 are exposed, so that the probe hose 2 can absorb liquid conveniently.
In the flute needle for ophthalmic surgery according to the embodiment of the present utility model, the length of the elastic piece 41 is preferably 1.5 to 2.5 times the length of the probe tube 2. If the length of the elastic sheet 41 is too short, it is difficult for the elastic sheet 41 to smoothly surround the side wall and the front end surface of the probe hose 2 in the first form; if the length of the spring 41 is too long, the spring 41 has a large volume, and the material consumption is large, thereby increasing the cost.
In the flute needle for ophthalmic surgery according to the embodiment of the present 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 spring plate with the size can be well matched with the probe hard tube 1 and the probe hose 2 of a conventional type 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 elastic sheet to the front end face of the hard tube of the probe is 0.3mm to 1.5mm. If the distance is too close, the elastic sheet is not firmly fixed; the second end of the spring is difficult to cover the probe hose in the first configuration if the distance is too far.
In the flute needle for ophthalmic surgery according to the embodiment of the present utility model, the first end is connected to the outer wall of the hard tube of the probe in a non-rigid manner. In the field of mechanics, rigid connection refers to a connection that cannot rotate after connection, and can withstand bending moments and other tensile forces, such as welding. The first end of the spring is not rigidly connected to the outer wall of the rigid tube of the probe, but rather is not rigidly connected.
The utility model also provides an operation method of the flute needle for the ophthalmic surgery, and an exemplary operation scene is that the flute needle is stretched into a scleral incision to attract liquid under the cooperation of a trocar. The method comprises the following steps:
step 1: the flute needle of the present embodiment is provided with the deformation switch in the first form, i.e. the deformation switch (spring) with harder texture protects the probe hose before formal use.
Step 2: a trocar is placed at an incision in the patient's eye. The trocar is a common medical instrument for minimally invasive surgery, the appearance is a tiny pipe fitting, the smooth cylindrical outer wall of the trocar is used for expanding an eye incision, and the through hole formed in the trocar can facilitate the whistle to enter and exit the eye incision. The size of the trocar needs to be matched to the size of the flute needle. Specifically: on the one hand, the inner diameter of the trocar is larger than the outer diameter of the probe hose so as to ensure that the probe hose can be inserted into the trocar; on the one hand, the inner diameter of the trocar is smaller than the outer diameter of the deformation switch, so that the deformation switch cannot be inserted into the trocar. Preferably, the inner diameter of the trocar is 1mm to 2mm 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 advanced against the through hole of the trocar. When the diameter of the deformation switch exceeds the inner diameter of the trocar (namely, the part of the periphery of the second end of the elastic sheet) to touch the trocar, the trocar can apply a first backward acting force to the deformation switch of the flute needle because the trocar is positioned in front of the deformation switch, so that the deformation switch is triggered to change from a first shape to a second shape, and then the probe hose is exposed, so that the probe hose can conveniently reach the suction position in the eyes of a patient.
Step 4: the flute needle is connected with the negative pressure drainage tube, so that the probe hose starts to suck liquid from the suction position until the suction is finished.
Step 5: in order to pull the flute needle out of the eye, the flute needle needs to be pulled back from the through hole of the trocar. When the diameter of the deformation switch exceeds the inner diameter of the trocar (namely, the part of the periphery of the second end of the elastic sheet) and touches the trocar, the trocar is positioned behind the deformation switch, and then the deformation switch of the flute needle is exerted with a second forward acting force by the trocar, so that the deformation switch is triggered to change from the second shape to the first shape, and then the deformation switch surrounds the probe hose again, and the function of protecting the probe hose is played outside eyes again.
In summary, the flute needle for ophthalmic surgery of the present utility model has a deformation switch which can play a role in protecting the probe tube outside the eye in the first state; when the first mode is switched to the second mode, the function of facilitating the probe hose to smoothly penetrate into the trocar and the eye is achieved; the probe hose can be conveniently and fully exposed in the second form, so that the smooth operation is ensured, and the device has the advantages of simple structure, easiness in use, lower cost and the like.
The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives can occur depending upon design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223525307.2U CN218943685U (en) | 2022-12-29 | 2022-12-29 | Flute needle for ophthalmic surgery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223525307.2U CN218943685U (en) | 2022-12-29 | 2022-12-29 | Flute needle for ophthalmic surgery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218943685U true CN218943685U (en) | 2023-05-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223525307.2U Active CN218943685U (en) | 2022-12-29 | 2022-12-29 | Flute needle for ophthalmic surgery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218943685U (en) |
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- 2022-12-29 CN CN202223525307.2U patent/CN218943685U/en active Active
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