CN210582826U

CN210582826U - Magnetic extractor for foreign body in eye

Info

Publication number: CN210582826U
Application number: CN201920918228.7U
Authority: CN
Inventors: 陈浩宇
Original assignee: Joint Shantou International Eye Center Of Shantou University And Chinese University Of Hongkong
Current assignee: Joint Shantou International Eye Center Of Shantou University And Chinese University Of Hongkong
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-05-22
Anticipated expiration: 2029-06-18

Abstract

The utility model relates to the field of medical equipment, in particular to a magnetic intraocular foreign body extractor, which comprises a holding handle and a magnetic extracting rod, wherein the magnetic extracting rod is in a flat strip shape and comprises a core layer and a silica gel layer which are kept to be shaped after being bent, a strong magnet is fixed on an extracting section of the core layer, and the silica gel layer is attached to the wall to coat the core layer; the non-fetching section of the magnetic fetching rod is bent to a stable state, and the maximum deviation amplitude of deformation resetting is not more than 1 mm. The extractor is convenient to operate, causes less trauma to the eyeballs of a patient in an operation, and is convenient for a doctor to safely and effectively extract the magnetic foreign matters in the eyes.

Description

Magnetic extractor for foreign body in eye

Technical Field

The utility model relates to the field of medical equipment, concretely relates to magnetic intraocular foreign matter extractor.

Background

Clinically, the injury of foreign bodies in the eyeballs is a common eye injury which seriously harms the eyesight, and the controllable, safe and effective removal of the foreign bodies in the eyes by the operation injury is the key for treating the injury of the foreign bodies in the eyeballs.

According to the nature of the foreign body in the eye, the foreign body can be divided into magnetic and non-magnetic foreign bodies, and the current clinical treatment proposal for the magnetic foreign body in the eye uses a magnetic sucker to take out the foreign body from the magnetic sucker in the eye. Most of the conventional intraocular magnetic suction devices are rod-shaped, have large size and fixed shape, and tend to cause large operative wounds when magnetic foreign matters are taken out from eyes. Therefore, the instruments are not suitable for minimally invasive vitrectomy, which is widely performed at present, and the defects can increase the difficulty of the operation, be not beneficial to the recovery of patients and finally reduce the success rate of the operation.

Disclosure of Invention

The utility model aims to provide a magnetic extractor for foreign matters in eyes, which has the advantages that the extractor is convenient to operate and is suitable for extracting foreign matters in a plurality of directions in eyes; the extractor has the advantages that the extractor causes less trauma to the eyeballs of a patient in an operation, and can safely and effectively extract the magnetic foreign matters in the eyes.

In order to achieve the above purpose, the utility model adopts the following technical means to implement:

a magnetic extractor for foreign bodies in eyes comprises a holding handle and a magnetic extracting rod, wherein the magnetic extracting rod is in a flat strip shape and comprises a core layer and a silica gel layer which are bent and maintained to be shaped, a strong magnet is fixed on an extracting section of the core layer, and the silica gel layer is attached to a wall to cover the core layer; the non-fetching section of the magnetic fetching rod is bent to a stable state, and the maximum deviation amplitude of deformation resetting is not more than 1 mm.

Furthermore, the strong magnet is made of neodymium iron boron magnet.

Furthermore, the strong magnet is in a sheet shape, and the strong magnet is fixedly attached to or embedded in or fixed in the fetching section of the core layer in an embedding mode.

Furthermore, the core layer is made of any one or more of martensite type, austenite type, ferrite type stainless steel or shape memory material.

As an effective setting scheme, the length of the magnetic extraction rod is 35-45mm, the width is 1.0-1.8mm, and the thickness is 0.25-0.65 mm.

Furthermore, the length of the fetching segment is 3-15 mm.

Further, the thickness of the silica gel layer is 0.05-0.08 mm.

As an effective arrangement scheme, the length of the holding handle is 50-120mm, and the diameter of the holding handle is 8-15 mm.

The utility model discloses have following useful part:

1. compared with the existing intraocular magnetic sucker, the magnetic sucker can pre-bend the magnetic suction taking rod according to the position of the magnetic foreign matters in the eyeball of a patient, and the flat strip-shaped magnetic suction taking rod has smaller incision on the eyeball after extending into the eyeball, can take out the magnetic foreign matters with less operation actions, and does not cause additional damage to the eyeball tissues of the patient due to the elastic resetting of the magnetic suction taking rod;

2. the structure and the size of the extractor are reasonably set, so that doctors can conveniently operate patients with different disease conditions, and unnecessary damage to the patients due to inconvenient use is reduced;

3. by using the shape memory material as the core layer material, the shape memory material can be reset by utilizing the memory performance of the shape memory material, for example, the shape memory material is reset in the high-temperature steam sterilization process, so that the angle of the extractor can be conveniently adjusted in the reuse process.

Drawings

FIG. 1 is a schematic view of embodiment 1 of the extractor;

FIG. 2 is an enlarged schematic view of a portion of FIG. 1A;

FIG. 3 is a schematic view of the extractor of example 2 with the silica gel layer removed;

FIG. 4 is an enlarged schematic view of the portion of FIG. 3B;

fig. 5 is a schematic view showing the shape reset of the magnetic extraction rod in embodiment 2 of the extractor.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Example 1

As shown in fig. 1-2, a magnetic extractor for intraocular foreign objects comprises a magnetic extracting rod and a handle 2, wherein the magnetic extracting rod is in a flat strip shape, the magnetic extracting rod comprises a core layer 11 and a silica gel layer 4, in this embodiment, any one of martensitic stainless steel, austenitic stainless steel and ferritic stainless steel is selected as the material of the core layer 11, the overall shape is in a flat strip shape, the length of the core layer 11 is 35mm, the width of the core layer is 1.5mm, the thickness of the core layer is 0.3mm, the length of the extracting section 12 is 5mm, the surface of the extracting section 12 of the core layer 11 is attached and fixed with a sheet-shaped neodymium iron boron magnet 3 with the thickness of 0.2mm, the silica gel layer 4 is coated outside the core layer 11 in a thin-wall attached manner, the thickness of the silica gel layer is 0.05-0.08mm, and the core layer 11 and the.

In the using process, as shown in fig. 1, the non-fetching section 11 of the martensitic stainless steel in the shape of a flat strip is bent under an external force to maintain a stable structural form, and in order to improve the accuracy in operation, the maximum deformation resetting maximum offset amplitude of the magnetic fetching rod is not more than 1mm under the condition that the non-fetching section 11 of the magnetic fetching rod is controlled to be bent to a stable state, the arrangement can be convenient for a doctor to bend and adjust the magnetic fetching rod according to the requirement without adjusting the bending angle for multiple times, after the doctor can observe the situation that the magnetic foreign matter is positioned in the position of the eye in advance, the non-fetching section 11 is bent to a proper angle, the fetching section 12 and a part of the non-fetching section 11 enter the eye through the transparent corneal incision, the direction of the fetching section 12 is slowly adjusted through the holding handle 2, the fetching section 12 is in contact with the foreign matter, and the magnetic foreign matter is introduced into the anterior, and then the magnetic material is taken out from the transparent cornea incision, in the process, the flat strip-shaped magnetic suction taking-out rod stretches into the eyeball, the incision of the eyeball is smaller, and the non-taking-out section 11 is bent to a proper angle in advance according to the position of the magnetic foreign material.

Example 2

As shown in fig. 3-5, as another excellent embodiment, in the selection of the material of the core layer 11 ', a shape memory material can be selected to replace the martensitic stainless steel, austenitic stainless steel, and ferritic stainless steel used in embodiment 1, and a silica gel material with high temperature resistance can be selected as the silica gel layer 4 ', and also, the non-extraction section 11 ' of the magnetic extraction rod needs to be controlled to be bent to a stable state, and the maximum deformation reset maximum offset amplitude of the magnetic extraction rod does not exceed 1 mm.

By selecting the shape memory material with the performance, when a doctor takes out the magnetic foreign matters, the occurrence of inaccurate operation caused by bending, resetting and deformation of the non-taking section 11' can be reduced, and after the shape memory material is used, the shape can be reset by adjusting the resetting temperature of the shape memory material, for example, the shape memory material is reset in the high-temperature steam sterilization process, so that the angle of the extractor can be conveniently adjusted when the extractor is used again;

in addition, in this embodiment, as shown in fig. 2, the configuration of the ndfeb magnet 3 'fixed to the picking section 12' in embodiment 1 is changed, a hole 13 'is formed in the picking section 12' of the core layer 11 ', a locking groove 131' is formed on the opposite side of the hole 13 ', a locking protrusion 31' is formed at the matching position of the sheet ndfeb magnet 3 'and the hole 13', and then the sheet ndfeb magnet 3 'is inserted into the hole 13' by deformation using the shape memory material to form a fixed state, the total length of the core layer 11 'is set to be 40mm, and the length of the picking section 12' is set to be 8 mm. The above scheme is a good setting mode, and can make the coplanar state to getting the surface of thing section 12 ' and flaky neodymium iron boron magnetism body 3 ', and preferably, the thickness that sets up and gets thing section 12 ' and flaky neodymium iron boron magnetism body 3 ' is 0.5mm equally, can effectively reduce embodiment 1 and paste the influence of the few protruding layers that flaky neodymium iron boron magnetism body 3 ' produced to the operation to it is stable controllable in the operation process.

As for embodiments 1 and 2, the length of the holding handle (2, 2') is 50-120mm, the diameter is 8-15mm, and the holding handle can be selected according to the operation habit of a doctor and the position of the magnetic foreign body on the eyeball, so that the convenience of use is improved.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A magnetic extractor for foreign bodies in eyes comprises a holding handle and a magnetic extracting rod, and is characterized in that the magnetic extracting rod is in a flat strip shape and comprises a core layer and a silica gel layer which are bent and maintained to be shaped, wherein a strong magnet is fixed on an extracting section of the core layer, and the silica gel layer is attached to a wall to cover the core layer; the non-fetching section of the magnetic fetching rod is bent to a stable state, and the maximum deviation amplitude of deformation resetting is not more than 1 mm.

2. The magnetic extractor of intraocular foreign bodies of claim 1 wherein said ferromagnetic material is neodymium iron boron magnet.

3. The magnetic extractor of intraocular foreign bodies of claim 2 wherein said ferromagnetic member is in the form of a sheet, said ferromagnetic member being affixed to or embedded in the core layer.

4. The magnetic extractor of intraocular foreign matter of claim 1 wherein the core layer is made of any one or more of martensitic, austenitic, ferritic stainless steel, or shape memory material.

5. The magnetic extractor of intraocular foreign matter as claimed in any of claims 1 to 4, wherein said magnetic extractor has a length of 35 to 45mm, a width of 1.0 to 1.8mm and a thickness of 0.25 to 0.65 mm.

6. The magnetic extractor of intraocular foreign matter of claim 5 wherein said extraction segment is 3-15mm in length.

7. The magnetic intraocular foreign body extractor of claim 5, wherein the thickness of said silicone layer is 0.05-0.08 mm.

8. The magnetic intraocular foreign material extractor according to any of claims 1 to 4, wherein the grip is 50 to 120mm long and 8 to 15mm in diameter.