CN219307126U - Pupil dilator - Google Patents

Abstract

The utility model provides a pupil expander, which comprises a plurality of folding sections, wherein one ends of the folding sections are movably connected through folding connecting pieces, and the folding connecting pieces drive the folding sections to fold inwards or expand outwards; the two ends of the support sections are respectively and movably connected with the folding sections, the support sections and the folding sections form a closed polygonal structure, and the support sections and the folding sections are positioned in the same plane; the limiting structures are sleeved on the folding sections and the supporting sections. The pupil dilator provided by the utility model can effectively avoid and reduce bleeding and inflammatory reaction in eyes, reduce related complications, is not easy to deform, can be reused after disinfection, and has the characteristics of economy, practicability and high safety.

Description

Pupil dilator

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a pupil expander.

Background

In the eyeball structure, the pupil in the center of the iris is similar to a shutter of a camera, and the amount of light entering the eye is controlled by the adjustment of the pupil size. Under certain pathological conditions, such as inflammation, trauma, iris ischemia necrosis, long-term drug action, etc., the iris does not respond well or well to mydriatic drugs, resulting in a failure of the pupil to dilate and a sustained small pupil. This situation presents difficulties in the observation and treatment of intraocular tissue, particularly posterior segment tissue, such as cataract extraction and intraocular lens implantation, diagnosis and treatment of vitreoretinal disease, and the like.

In order to overcome the condition that the eyeball pupil is too small and can not be dilated by medicaments, the technical measures adopted clinically at present include: (1) The iris tissue is incised using a sharp instrument such as a scalpel, scissors or cutter to dilate the pupil. The technical measures have the defects of large iris tissue injury, excessive bleeding, heavy intraocular inflammatory reaction, oversized pupils after operation, difficult restoration and the like; (2) iris retractor. Multiple incisions are made in the cornea, and multiple sites of iris retractors are used to dilate the pupil by dragging the pupil edge. The technical measure needs to make a plurality of cornea incisions, causes cornea damage, and has the defects that the drag force of the drag hook is small and the drag hook is easy to loosen, the iris drag hook can prevent the operation of the operation outside the eyes in a way, and the like; (3) preloaded iris expander is used. The prior commercially available preassembled iris expanders are high in price, each iris expander needs thousands of RMB units and most of the iris expanders cannot be reused; the preloaded iris expander is expanded after being introduced into eyes through cornea incisions, has the defects of complex intraocular operation, poor controllability, easy damage to tissues such as fragile cornea endothelium, iris, anterior chamber angle and the like in the eyes, and is easy to generate corresponding complications. Thus, the current existing technical measures and products have obvious defects and drawbacks in treating small pupils.

Disclosure of Invention

The utility model aims to provide a pupil expander, which has the advantages of simple pupil expanding operation, low cost and high safety.

In order to achieve the above purpose, the utility model provides a pupil expander, comprising a plurality of folding sections, wherein one ends of the folding sections are movably connected through folding connectors, and the folding connectors drive the folding sections to fold inwards or expand outwards; the two ends of the support sections are respectively and movably connected with the folding sections, the support sections and the folding sections form a closed polygonal structure, and the support sections and the folding sections are positioned in the same plane; the limiting structures are sleeved on the folding sections and the supporting sections.

Further, a first through hole is formed in the folding connecting piece, and one ends of the two folding sections are pivoted with the folding connecting piece.

Further, the folding section and the supporting section are made of light alloy or plastic.

Further, two ends of the support section are respectively and movably connected with one folding section through a hinge joint.

Further, a second through hole is formed in the hinge joint.

Further, the limit structure comprises a sleeve, a vane is respectively arranged on two sides of the sleeve, and the sleeve is sleeved on the folding section and the supporting section.

Further, the included angle between the lobes is 10-120 degrees.

Furthermore, the material of limit structure is medical silica gel.

After the scheme is adopted, the pupil expander disclosed by the utility model enters and exits the anterior chamber through the small cornea incision in a folded state, so that complications such as eyeball injury, astigmatism and the like caused by a large cornea incision can be avoided. The dilator can controllably dilate in the anterior chamber and effectively maintain the size of the pupil. The dilator has simple operation and small damage to cornea and iris, can effectively avoid and reduce intraocular hemorrhage and inflammatory reaction, and reduce related complications. The dilator is not easy to deform, can be reused after disinfection, and has the characteristics of economy, practicability and high safety.

Drawings

FIG. 1 is a schematic view of the utility model in an expanded state.

Fig. 2 is a schematic view of the present utility model in a contracted state.

Reference numerals illustrate:

folding segment 10, folding connection 11, first through hole 111, articulation joint 12, second through hole 121, support segment 20, limit structure 30, sleeve 31, lobe 311.

Detailed Description

In order to further explain the technical scheme of the utility model, the utility model is explained in detail by specific examples.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientation or positional relationship based on that shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

As shown in fig. 1 to 2, the pupil expander provided by the present utility model includes a plurality of folding segments 10, a plurality of supporting segments 20, and a plurality of limiting structures 30. Wherein, one end of the folding section 10 is movably connected through a folding connecting piece 11, and the folding connecting piece 11 drives the folding section 10 to fold inwards or expand outwards; two ends of the supporting section 20 are respectively and movably connected with a folding section 10, the supporting section 20 and the folding section 10 form a closed polygonal structure, and the supporting section 20 and the folding section 10 are positioned in the same plane; the limiting structure 30 is sleeved on the folding section 10 and the supporting section 20.

When the pupil expander provided by the utility model is used, a patient takes a supine position, and after surface anesthetic is dripped, the upper eyelid and the lower eyelid are opened by using an eyelid opener, so that the cornea is exposed. The operator makes a main incision of cornea about 2mm in length, and introduces the folding pupil expander into the anterior chamber in a folded state through the main incision of cornea with micro forceps or artificial lens implantation forceps. The cornea side incision is made by using the devices such as an artificial lens positioning hook, a nucleus splitting hook or capsulorhexis forceps, the pupil edge which is properly dilated is embedded between the two lobes 31 of the upper limit structure 30 of the dilator, and then the pupil is dilated manually and slowly by using the devices such as the artificial lens positioning hook, the nucleus splitting hook or capsulorhexis forceps which are respectively pulled outwards in opposite directions on the inner sides of the two support sections 20 until the dilator is completely unfolded. After the intraocular examination or treatment is completed, the intraocular lens positioning hook, nucleus splitting hook or capsulorhexis forceps and other instruments are placed in the first through hole 111 of the folding connector 11, the folding segment 10 of the pupil expander is drawn inwards towards each other, and the expander is folded manually until the state is the minimum. The pupil expander in the folded state is taken out from the primary incision of the cornea by using micro forceps or artificial lens implantation forceps. Thus, the use of the folding pupil expander is completed.

The overall number of the pupil expander provided by the present utility model, the folding segment 10 and the support segment 20, may be variously combined, and is determined by the planar area in the expanded state, and is not limited herein. In this embodiment, a rectangular pupil expander with four folding segments 10, two support segments 20, eight limiting structures 30 is exemplified.

The pupil expander provided by the utility model is characterized in that a folding connecting piece 11 is arranged on a folding section 10, a first through hole 111 is arranged on the folding connecting piece 11, and one end of the folding section 10 is pivoted with the folding connecting piece 11. In use, the device such as an intraocular lens positioning hook, a nucleus splitting hook or capsulorhexis forceps is placed in the first through hole 111 of the folding connector 11, the pupil expander folding section 10 is drawn inwards towards each other, and the expander is folded manually until the state is minimized.

Further, the two ends of the folding connection piece 11 are mutually limited, specifically, one end of the bottom of the folding connection piece 11 extends outwards to form a limiting piece, and the limiting piece is placed at the bottom of the other folding section 10 when in an expanded state and is contacted with the bottom of the other folding section 10, so that the two folding sections 10 are expanded to 180 degrees at most, excessive expansion of the folding sections 10 is prevented, and stability of the expanded state is also facilitated to be maintained; one or more of the folding connectors 11 with the first through holes 111 are folded or expanded on the same plane.

The pupil expander provided by the utility model is characterized in that the folding section 10 and the supporting section 20 are made of light alloy or plastic, and can be made of a combination of light alloy and plastic. Further, the light alloy can be aluminum alloy, magnesium alloy or titanium alloy, etc. The light plastic may be Polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyurethane (PU), polytetrafluoroethylene (PTFE), polycarbonate (PC), polystyrene (PS), etc.

The pupil expander provided by the utility model has two ends of a support section 20 respectively movably connected with a folding section 10 through a hinge joint 12. Further, the hinge joint 12 is provided with a second through hole 121. In the expansion stage and the contraction stage, the folding section 10 and the supporting section 20 rotate around the second through hole 121 as an axis, and instruments such as an intraocular lens positioning hook, a nucleus splitting hook or capsulorhexis forceps can be placed in the second through hole 121, so that the contraction and expansion of the expander provided by the utility model are facilitated.

The limiting structure 30 of the pupil expander provided by the utility model comprises a sleeve 31, wherein two sides of the sleeve 31 are respectively provided with a vane 311, and the sleeve 31 is sleeved on the folding section 10 and the supporting section 20. In the present embodiment, one sleeve 31 is sleeved on each folding section 10, and two sleeves 31 are sleeved on each supporting section 20. When in use, the pupil edge is embedded between the two lobes 311 of the limiting structure 30, so that the limiting structure 30 limits the pupil edge, and the situation that the pupil cannot expand along with the expander due to the fact that the pupil edge falls off from the expander during expansion is avoided. Further, the included angle between the two lobes 311 is 10-120 degrees.

The limiting structure 30 of the pupil dilator provided by the utility model is made of medical silica gel, and can be specifically made of medical soft silica gel.

In summary, the pupil expander provided by the utility model can enter and exit the anterior chamber through the small cornea incision in a folded state, and can avoid complications such as eyeball injury, astigmatism and the like caused by a large cornea incision. The dilator is manually controllable to dilate in the anterior chamber and can effectively maintain the size of the pupil. The dilator has simple operation and small damage to cornea and iris, can effectively avoid and reduce intraocular hemorrhage and inflammatory reaction, and reduce related complications. The dilator is not easy to deform, can be reused after disinfection, and has the characteristics of economy, practicability and high safety.

The foregoing description of specific exemplary embodiments of the utility model has been presented for the purposes of illustration and description, but is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described in order to explain the principles of the utility model and its practical application to thereby enable one skilled in the art to make and use various exemplary embodiments of the utility model and various alternatives and modifications, as may be suited to the particular use contemplated by one skilled in the art without departing from the scope of the utility model.

Claims (8)

1. A pupil expander, characterized in that: comprising the steps of (a) a step of,

the folding connecting pieces drive the folding sections to fold inwards or expand outwards;

the two ends of the support sections are respectively and movably connected with the folding sections, the support sections and the folding sections form a closed polygonal structure, and the support sections and the folding sections are positioned in the same plane;

the limiting structures are sleeved on the folding sections and the supporting sections.

2. A pupil expander as claimed in claim 1, wherein: the folding connecting piece is provided with a first through hole, and one ends of the two folding sections are pivoted with the folding connecting piece.

3. A pupil expander as claimed in claim 1, wherein: the folding section and the supporting section are made of light alloy or plastic.

4. A pupil expander as claimed in claim 1, wherein: two ends of the support section are respectively and movably connected with one folding section through a hinge joint.

5. A pupil expander as claimed in claim 4, wherein: and a second through hole is formed in the hinge joint.

6. A pupil expander as claimed in claim 1, wherein: the limiting structure comprises a sleeve, two sides of the sleeve are respectively provided with a vane, and the sleeve is sleeved on the folding section and the supporting section.

7. A pupil expander as claimed in claim 6, wherein: the included angle between the lobes is 10-120 degrees.

8. A pupil expander as claimed in claim 1, wherein: the limiting structure is made of medical silica gel.

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