CN211750423U

CN211750423U - Micro-tweezers

Info

Publication number: CN211750423U
Application number: CN201921851709.7U
Authority: CN
Inventors: 邬开宬; 宗媛; 方王怡; 余建; 许欢; 李轻宸; 顾瑞平; 周旭娇; 姜春晖; 孙兴怀
Original assignee: Eye and ENT Hospital of Fudan University
Current assignee: Eye and ENT Hospital of Fudan University
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-10-27
Anticipated expiration: 2029-10-30

Abstract

The utility model discloses a micro-tweezers, include: the forceps handle is provided with two forceps heads and is used for being held by hands; any forceps head is provided with a forceps tip which is used for clamping tissues and sutures and can ensure light transmittance so as to prevent optical coherence tomography signals from being shielded, and the forceps heads and the forceps tips are arranged in one-to-one correspondence. The micro-tweezers are simple in structure, convenient to use and low in cost, the light transmittance of the micro-tweezers is greater than 85%, OCT signals cannot be shielded, the OCT signals can be transmitted in a lossless mode, and therefore the problem that the traditional micro-tweezers shield the OCT signals and cannot be matched with a navigation imaging device in an OCT operation can be solved.

Description

Micro-tweezers

Technical Field

The utility model relates to the technical field of medical equipment, in particular to micro-tweezers.

Background

Human eyes are used as precise optical imaging organs, and fine image assistance in the operation can improve the success rate of ophthalmic surgery and reduce complications.

At present, most of ophthalmic surgeries are performed under an ophthalmic microscope, however, the most widely used surgical microscope cannot realize observation of the longitudinal section structure of the opaque tissue, so that the surgical design requirements cannot be met in many clinical ophthalmic surgeries. OCT (optical coherence tomography) measures the phase delay and light intensity of a backscattering echo of a biological tissue by using an optical coherence technique, and performs 3D real-time in-vivo imaging on the biological tissue, wherein the axial resolution of the imaging reaches 1-15 microns, is 1-2 orders of magnitude higher than that of ultrasonic imaging, and is a mature technical means in ophthalmic clinical diagnosis and treatment; the exploration of accurate navigation for introducing the OCT into the ophthalmic surgery starts at the beginning of the century, and the OCT enters the research stage of a navigation microscope of the third generation frequency-sweeping OCT (SS-OCT) surgery. The advantages of navigation imaging in OCT operation are as follows: when the operation visual field is imaged in real time, the tomography OCT image with scanning precision reaching the micron level can be fed back in real time, so that the slight change of the eye tissue structure is displayed, and auxiliary information is provided for improving the operation safety. The ophthalmic micro-forceps is one of the most common surgical instruments in ophthalmic surgery, and is indispensable in the processes of splitting, extracting tissues and clamping and knotting suture lines; however, it faces the problems of: the overall structure of the traditional surgical micro-forceps is made of metal materials, and OCT signals can be shielded, so that tissues below the traditional surgical micro-forceps cannot be developed, and the observation of the surgical visual field is influenced.

Therefore, how to avoid the problem that the traditional surgical micro-forceps cannot develop the tissue and affect the surgical field due to the OCT signal shielded by the traditional surgical micro-forceps is a technical problem which needs to be solved by the technicians in the field at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a micro-tweezers, this micro-tweezers can compensate the defect of traditional micro-tweezers, can guarantee the luminousness to can prevent to shield the OCT signal, but consequently adaptation OCT operation navigation image device.

In order to achieve the above object, the utility model provides a pair of micro-tweezers, include:

the forceps handle is provided with two forceps heads and is used for being held by hands;

any one forceps head is provided with a forceps tip which is used for clamping tissues and sutures and can ensure light transmittance so as to prevent optical coherence tomography signals from being shielded, and the forceps heads and the forceps tips are arranged in one-to-one correspondence.

Optionally, any one of the forceps heads comprises an end part for fixedly connecting the forceps tip, and the end part is provided with a connecting hole for embedding the tail part of the forceps tip.

Optionally, the material of the forceps tip is specifically polymethyl methacrylate.

Optionally, the length of the part of any one forceps tip exposed out of the forceps head ranges from 3mm to 4.8mm, and the length of the part of any one forceps tip embedded in the forceps head ranges from 0.6mm to 1.2 mm.

Optionally, the inner side of any one of the forceps tips is provided with a clamping surface for improving the clamping force.

Optionally, the clamping surface is embodied as a transverse insection clamping surface.

Optionally, a plurality of anti-slip holes for achieving anti-slip are formed in the forceps handle.

Compared with the prior art, the utility model discloses to ophthalmic surgery's different requirements, designed a micro-tweezers, because surgical instruments to the characteristic requirement in the aspect of intensity, hardness, rigidity, toughness, wearability and corrosion resisting property, almost all get the micro-tweezers overall structure of ophthalmic surgery and make by the metal material at present, it leads to the unable development of its below tissue to OCT signal's shielding, influences the operation field of vision and observes. Therefore, the ophthalmic surgical micro-forceps capable of adapting to navigation imaging in the OCT operation needs to have the advantages of strength, hardness, rigidity, toughness, wear resistance, corrosion resistance and light transmittance, and the OCT signals can be transmitted without damage by the material with the light transmittance of more than 85%. Therefore, it is necessary to provide a micro-forceps capable of securing sufficient light transmittance to prevent the OCT signal from being masked.

Specifically, the microscopic forceps comprise a forceps handle, forceps heads and forceps tips, wherein the forceps handle is used for holding a hand, the forceps handle is provided with the two forceps heads, any one of the forceps heads is provided with the forceps tip used for clamping tissues and sutures, the forceps tip can ensure light transmittance to prevent optical coherence tomography signals from being shielded, and the forceps heads and the forceps tips are arranged in one-to-one correspondence. Therefore, compared with the traditional metal ophthalmological micro-forceps in the prior art, the micro-forceps is simple in structure, convenient to use and low in cost, the light transmittance of the micro-forceps is greater than 85%, OCT signals cannot be shielded, the OCT signals can be transmitted in a lossless mode, and the problem that the traditional micro-forceps are used for shielding the OCT signals and cannot be adapted to a navigation imaging device in an OCT operation can be solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural view of a pair of micro tweezers provided in the embodiment of the present invention.

Wherein:

1-forceps handle, 11-antiskid hole, 2-forceps head and 3-forceps tip.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a micro-tweezers, this micro-tweezers can compensate the defect of traditional micro-tweezers, can guarantee the luminousness to can prevent to shield the OCT signal, but consequently adaptation OCT operation navigation image device.

In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

It should be noted that the following directional terms such as "upper end, lower end, left side, right side" and the like are defined based on the drawings of the specification.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a pair of tweezers according to an embodiment of the present invention.

The embodiment of the utility model provides a micro-tweezers for the relevant ophthalmic surgery operation of adaptation under Optical coherence Tomography (SweptSource-Optical Coherent Tomography, OCT) navigation surgery microscope. The micro forceps comprise a forceps handle 1, forceps heads 2 and forceps tips 3, wherein the forceps handle 1 is used for holding a hand, the forceps handle 1 is provided with the two forceps heads 2, any one forceps head 2 is provided with the forceps tip 3 used for clamping tissues and suture threads, the forceps tip 3 can guarantee light transmittance to prevent optical coherence tomography signals from being shielded, and the forceps heads 2 and the forceps tips 3 are arranged in a one-to-one correspondence mode.

Certainly, according to actual needs, the forceps handle 1 and the forceps head 2 of the micro forceps can be made of stainless steel, the forceps tip 3 can be made of polymethyl methacrylate which is commonly called organic glass and is thermoplastic plastic, the transparency is extremely high, the transmittance of visible light can reach 99%, the mechanical strength and the toughness are more than 10 times of those of common glass, the hardness can reach the hardness of metal aluminum, the thermal deformation temperature can reach 140 ℃, the micro forceps have outstanding chemical corrosion resistance and the characteristic of easy cutting processing, and an ideal choice is provided for the micro surgical forceps adapted to the OCT navigation microscope.

That is to say, the body of the micro-forceps (the forceps handle 1 and the forceps head 2) is made of stainless steel, and the forceps tip 3 (the part mainly exposed to the operation field) is made of polymethyl methacrylate, so that the defects of the traditional all-metal micro-forceps can be overcome by adding an organic glass sheet to the end of the forceps head 2 to form the forceps tip 3, and the micro-forceps can be adapted to an OCT operation navigation imaging device.

Therefore, when the micro-forceps are used in eye surgery operation, the operation area is limited to the eyeball, so that only the organic glass area is in the operation area and does not block OCT signals. It can be understood that the forceps handle 1 is convenient for applying external force to the metal forceps head 2 and the organic glass forceps tip 3, when in use, the forceps handle 1 is held by hand to place the forceps tip 3 in an operation area, and then pressure is slightly applied to the forceps handle 1 to enable the forceps tips 3 to be closed together for clamping tissues and sutures.

Compared with the traditional metal ophthalmological micro-forceps in the prior art, the micro-forceps is simple in structure, convenient to use, low in cost, high in light transmittance of more than 85%, and free of shielding OCT signals, so that OCT signals can be transmitted without damage, and the micro-forceps can resist high-temperature sterilization at 122 ℃ for 20 minutes or H₂O₂And (5) low-temperature plasma disinfection.

Further, any forceps head 2 may specifically be provided with an end portion for fixedly connecting the forceps tip 3, in order to facilitate the fixed installation of the forceps tip 3, the forceps tip 3 may be fixedly connected in an embedded connection manner, that is, a connection hole for embedding the tail portion of the forceps tip 3 may be provided at the end portion, and the shape of the connection hole may specifically be adjusted according to the structure of the forceps tip 3, for example, the connection hole may be provided as a circular hole, a square hole or an irregular hole, which is not specifically limited herein; correspondingly, the connection end part of the forceps tip 3 and the forceps head 2 is also set to be a structure which can be tightly attached to the inner wall of the connection hole.

Meanwhile, in order to further enhance the connection stability and firmness of the forceps tip 3, the forceps tip 3 can be more tightly connected into the connecting hole through a corresponding mechanical clamp (such as a forceps), that is, after the tail of the forceps tip 3 is embedded into the connecting hole, a proper external force can be applied to the end part of the forceps head 2 through the mechanical clamp, so that the connecting hole is slightly deformed, and thus, the inner wall of the connecting hole can further clamp the forceps tip 3, and the forceps head 2 is tightly connected with the forceps tip 3.

Of course, the forceps head 2 and the forceps tip 3 may be in other manners, and the forceps head 2 and the forceps tip 3 are not unfolded one by one as long as the connection tightness of the forceps head 2 and the forceps tip 3 is ensured.

In order to ensure the stability of the connection of the forceps tips 3, the length range of the part of any one forceps tip 3 exposed out of the forceps head 2 can be set to be 3mm-4.8mm, and the length range of the part of any one forceps tip 3 embedded in the forceps head 2 can be set to be 0.6mm-1.2 mm. The above two length ranges are designed based on considerations of stability of the forceps holder, the longer the exposed portion, the longer the embedded portion, and the less the exposed portion can be (generally no more than 4.8mm), otherwise the stability of the holder will be reduced.

In order to optimize the above embodiment, the inner side of any one of the forceps tips 3 is provided with a holding surface for improving the holding force, the holding surface may be specifically configured as a transverse insection-shaped holding surface, and the transverse insection-shaped holding surface may be specifically formed by polishing with a special polishing tool.

On the basis, the forceps handle 1 can be further provided with a plurality of anti-skid holes 11 for achieving anti-skid, specifically, two rows of anti-skid circular holes can be symmetrically arranged on two side walls of the forceps handle 1, namely, the plurality of anti-skid holes 11 on any side wall can be arranged side by side along the length direction of the forceps handle 1.

In addition, the length of the forceps handle 1 can be set to be about 79mm, the length of the forceps head 2 can be set to be about 28mm, and the whole micro forceps can resist high-temperature sterilization of 122 ℃ and 20 minutes or H₂O₂And (5) low-temperature plasma disinfection.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The above details the micro-tweezers provided by the utility model. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. Microscopic forceps, characterized by comprising:

the forceps handle (1) is provided with two forceps heads (2), and the forceps handle (1) is used for being held by hands;

arbitrary tweezers head (2) are equipped with tweezers point (3) for centre gripping tissue and suture, tweezers head (2) with tweezers point (3) one-to-one sets up, tweezers point (3) are the tweezers point that transparent form plastics were made to guarantee that the luminousness realizes preventing to shield optical coherence tomography signal, and arbitrary tweezers head (2) are including being used for fixed connection the tip of tweezers point (3), the tip is equipped with and is used for supplying the connecting hole of the afterbody embedding of tweezers point (3).

2. Microscopic forceps according to claim 1, characterized in that the forceps tips (3) are made of polymethyl methacrylate.

3. Microscopic forceps according to claim 2, characterized in that the length of the part of any forceps tip (3) exposed out of the forceps head (2) is in the range of 3mm to 4.8mm, and the length of the part of any forceps tip (3) embedded in the forceps head (2) is in the range of 0.6mm to 1.2 mm.

4. Micro-forceps according to any one of claims 1 to 3, characterised in that the inner side of any one of the forceps tips (3) is provided with a clamping surface for increasing the clamping force.

5. Microscopic forceps according to claim 4, characterized in that the clamping surfaces are in particular transverse insection-like clamping surfaces.

6. Microscopic forceps according to claim 5, characterized in that the forceps handle (1) is provided with a plurality of anti-slip holes (11) for achieving anti-slip.