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WO2018007859A1 - Dispositif d'extraction pour retirer un élément d'un œil et procédé d'extraction - Google Patents

Dispositif d'extraction pour retirer un élément d'un œil et procédé d'extraction Download PDF

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Publication number
WO2018007859A1
WO2018007859A1 PCT/IB2016/055034 IB2016055034W WO2018007859A1 WO 2018007859 A1 WO2018007859 A1 WO 2018007859A1 IB 2016055034 W IB2016055034 W IB 2016055034W WO 2018007859 A1 WO2018007859 A1 WO 2018007859A1
Authority
WO
WIPO (PCT)
Prior art keywords
wires
retrieval
eye
retrieval device
basket
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2016/055034
Other languages
English (en)
Inventor
Karthik Srinivasan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2018007859A1 publication Critical patent/WO2018007859A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
    • A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting in contact-lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/00234—Surgical instruments, devices or methods for minimally invasive surgery
    • A61B2017/00287—Bags for minimally invasive surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/00234—Surgical instruments, devices or methods for minimally invasive surgery
    • A61B2017/00358—Snares for grasping
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B2017/00681—Aspects not otherwise provided for
    • A61B2017/00738—Aspects not otherwise provided for part of the tool being offset with respect to a main axis, e.g. for better view for the surgeon
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/30—Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
    • A61B2090/306—Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure using optical fibres
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting in contact-lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F2009/00861—Methods or devices for eye surgery using laser adapted for treatment at a particular location
    • A61F2009/00865—Sclera
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting in contact-lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments
    • A61F9/00745—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments using mechanical vibrations, e.g. ultrasonic

Definitions

  • the present disclosure relates to the field of ophthalmology. Particularly, the present disclosure relates to the field of devices used for retrieval of elements from eyes.
  • Element - refers to a dislocated lens, any part of a dislocated lens, any foreign element, or any biological element within the eye.
  • the element may be located in the eye.
  • Fragmatome equipment refers to a device which is used for fragmentation or emulsification of the elements present in the eye.
  • Endo-illumination probe refers to a device used to provide light for illumination of a surgical operation inside the body.
  • retrieval devices are used to retrieve biological or foreign element from within an eye.
  • Such elements include a lens or any metallic or non- metallic foreign element.
  • Dislocated lens and/or any element thereof are removed from the eye by using the retrieval device, preferably fragmatome equipment.
  • the fragmatome equipment is used to emulsify the dislocated lens and/or any element thereof.
  • the fragmatome equipment is not suitable to remove any metallic or non-metallic foreign body from within the eye.
  • a retrieval magnet or a forceps is used. Therefore, there is felt a need of a retrieval device and method that can be used to remove a dislocated lens as well as any foreign body from the eye and that alleviates drawbacks of the aforementioned devices and the methods.
  • Yet another object of the present disclosure is to provide a retrieval device and a method for removal of an element from an eye that does not create any complication to the structure of an eye.
  • the present disclosure envisages a retrieval device for removing an element from an eye.
  • the retrieval device comprises a plurality of wires and a sheath.
  • the plurality of wires is connected at an operative end thereof to define a blunt end.
  • the sheath defines a lumen and is configured to partially cover the plurality of wires.
  • the sheath and the plurality of wires are movable relative to each other, thereby facilitating a formation of a retrieval basket at the blunt end.
  • the size of the retrieval basket is varied by displacing the sheath over the plurality of wires in accordance with the size of the element to be retrieved from the eye.
  • Each of the plurality of wires is made of a kink-resistant super elastic metallic alloy.
  • the kink-resistant super elastic metallic alloy is nickel titanium alloy.
  • the number of wires in the plurality of wires is four.
  • the plurality of wires includes a first set of wires and a second set of wires.
  • the first set and the second set of wires are defined by two wires which are spaced 180° apart with respect to each other, such that all the wires of the first set and the second set of wires are spaced 90° apart from each other.
  • the first set of wires is adapted to move in tandem with the second set of wires to facilitate the opening and closing of the retrieval basket, thereby allowing the capture and retrieval of the element from the eye.
  • the plurality of wires has a cross sectional configuration selected from a group consisting of D-shape, B-shape, V-shape, and semi-circular shape. Further, at least two adjacent wires of the plurality of wires are interconnected by a wire mesh to securely capture the element that is to be retrieved from the eye.
  • the lumen is configured to receive fragmatome equipment and/or an endo-illumination probe.
  • the sheath is of a metallic or a non-metallic material.
  • the retrieval basket is of a metallic or a non-metallic material, wherein the metallic material includes steel and alloys of steel.
  • the present disclosure also envisages a method for retrieving an element from an eye.
  • Figure 1 illustrates a conventional device, which is used to retrieve an element from within the eye, in a closed state
  • Figure 2 illustrates the conventional device of figure 1 in an open state
  • Figure 3 illustrates a photographic view of a retrieval device, in accordance with an embodiment of the present disclosure
  • Figure 4 illustrates a photographic view of the retrieval device of the figure 3 with captured element
  • Figure 5 illustrates another photographic view of the retrieval device of the figure 3 with captured element
  • Figure 6 illustrates a schematic view of the retrieval device, in accordance with another embodiment of the present disclosure
  • Figure 7 illustrates a schematic view of the retrieval device, in accordance with still another embodiment of the present disclosure
  • Figure 8 illustrates a schematic view of the retrieval device, in accordance with yet another embodiment of the present disclosure
  • Figure 9 illustrates a schematic view of the retrieval device, in accordance with still another embodiment of the present disclosure.
  • Figure 10a, 10b, and 10c illustrates schematic views of the retrieval device, in accordance with yet another embodiment of the present disclosure.
  • Figure 1 illustrates a conventional device 100, which is used to retrieve an element from an eye, in a closed state.
  • Figure 2 illustrates the conventional device 100 of figure 1 in an open state.
  • the conventional device 100 has a sheath 110 and a retrieval assembly in a form of a basket 120.
  • the basket 120 is configured to move in and out of the sheath 110.
  • the basket 120 follows a collapsed profile having a reduced diameter, as shown in figure 1. If the sheath 110 is retracted relative to the basket 120 or the basket 120 is forcibly moved beyond the end of the sheath 110, the basket 120 expands in such a way that the profile of the basket 120 has a larger diameter than the diameter of the basket 120 having the collapsed profile, as shown in figure 2.
  • Such basket 120 of the conventional device 100 has a round or oval shaped profile.
  • the conventional device 100 is unsuitable for retrieving an element from within the eye, especially a dislocated lens.
  • the present disclosure envisages a retrieval device and a method that is to be used to remove the dislocated lens as well as any metallic or non-metallic foreign body from within the eye.
  • the retrieval device is configured to open in order to capture the element, and to release the captured element in extended state.
  • the retrieval device is also configured to release the captured element while the retrieval device is still positioned within the eye.
  • the captured element may be a dislocated lens, any part of a dislocated lens, any foreign element, or any biological element within the eye.
  • the element may be located in the anterior, the exterior or any other part of the eye.
  • the retrieval device comprises a plurality of wires and a sheath.
  • the plurality of wires is connected at an operative end thereof to define a blunt end.
  • the sheath defines a lumen, and is configured to partially cover the plurality of wires.
  • the sheath and the plurality of wires are movable relative to each other, thereby facilitating a formation of a retrieval basket at the blunt end.
  • the size of the retrieval basket is varied by displacing the sheath over the plurality of wires in accordance with the size of the element to be retrieved from the eye.
  • Different embodiments of the retrieval device, of the present disclosure are now elaborately described with reference to figure 3 through figure 10c.
  • Figure 3 illustrates a photographic view of a retrieval device 200, in accordance with an embodiment of the present disclosure.
  • Figure 4 illustrates a photographic view of the retrieval device 200 of the figure 3 with captured element 250.
  • Figure 5 illustrates another photographic view of the retrieval device 200 of the figure 3 with captured element 250.
  • the retrieval device 200 comprises a plurality of wires 220 that are partially covered by a sheath 210.
  • the plurality of wires 220 extends from an operative distal end 210a of the sheath 210.
  • each of the plurality of wires 220 is made of kink-resistant super elastic metallic alloy, which exhibits a super elastic property when maintained at a transformation temperature thereof.
  • the transformation temperature of the plurality of wires 220 is kept below the normal operating temperature of the plurality of wires 220 to maintain the plurality of wires 220 in a super elastic state. In such a state, the plurality of wires 220 advantageously returns to their original shape when a deformation stress is removed from the plurality of wires 220.
  • the plurality of wires 220 also increasingly resists the deformation as the stress load is increased.
  • the sheath is of a metallic or a non-metallic material.
  • Each of the plurality of wires 220 is made of a kink-resistant super elastic metallic alloy. In an embodiment, each of the plurality of wires 220 is defined by a single strand of the kink- resistant super elastic metallic alloy. In another embodiment, each of the plurality of wires 220 is made of a plurality of strands of a kink-resistant super elastic metallic alloy.
  • each of the plurality of wires 220 is made of nickel titanium, alloy also known as nitinol.
  • the plurality of wires 220 When the plurality of wires 220, made up of nitinol, is operated below the transformation temperature thereof, the plurality of wires 220 must be heated to return to its original shape.
  • the operating temperature of the plurality of wires 220, of the present disclosure is above its transformation temperature to resist kinking and to return to its original shape without the application of any heat thereto.
  • the plurality of wires 220 is configured such that the plurality of wires 220 forms a basket (also interchangeably referred to as the retrieval basket) 240 at the distal portion thereof having a bulbous shape to effectively capture the lens, the foreign bodies, or any other element within the eye.
  • the basket 240 has a round or pear like shape.
  • the retrieval device need not be only a basket but can also be conceived to be of any shape or design with the plurality of wires, e.g., the device can be half a basket or box shaped or any conceivable form to grasp or engulf the element.
  • the retrieval basket is of a metallic or a non-metallic material, wherein the metallic material includes steel and alloys of steel.
  • the basket 240 is formed by the plurality of wires 220 such that the plurality of wires 220 is parallel, non-overlapping and non-intersecting with each other.
  • the plurality of wires 220 is closely spaced to each other, such that the maximum distance therebetween is 2 mm.
  • the basket 240 is formed by four wires. More specifically, the number of wires in the plurality of wires 220 is four.
  • the basket 240 has a zero-tip or tipless configuration.
  • the plurality of wires 220 has a cross sectional configuration selected from a group consisting of D-shape, B- shape, V-shape and semi-circular shape.
  • the plurality of wires 220 terminate at an operative distal end 230, such that the operative distal end 230 of the plurality of wires 220 has a zero- tip configuration.
  • the retrieval device 200 is introduced either into the posterior or anterior chamber of the eye such that the distal end of the retrieval device 200 abuts the eye.
  • the plurality of wires 220 is completely enclosed within the sheath 210.
  • the method involves displacing the plurality of wires 220 relative to the sheath 210 to configure the retrieval basket 240. More specifically, the distal end 230 of the plurality of wires 220 is extended beyond the distal end 210a of the sheath 210 to form the retrieval basket 240.
  • the plurality of wires 220 is further extended beyond the distal end 210a of the sheath 210.
  • the extended portion of the plurality of wires 220 forms a loop to capture the element 250 within the basket 240.
  • the distal end 230 of the plurality of wires 220 is advanced directly over the element 250 to be retrieved, thereby parting the plurality of wires 220 from each other to form a bigger loop.
  • the element enters the basket 240 via an opening created by parted plurality of wires 220 at the distal end 230 thereof. Subsequent to the aforementioned steps, the retrieval device 200, along with the element 250 captured within the retrieval basket 240, is displaced away from the eye.
  • the retrieval device 200 captures the element 250 at the side thereof through or between the loops formed by the plurality of wires 220.
  • the captured element 250 can be released from the retrieval device 200 by extending the proximal portion (not shown in figures) of the plurality of wires 220 beyond the distal end 210a of the sheath 210.
  • the element 250 can then be emulsified within the basket 240. If the captured element 250 is required to be held within the basket 240, the sheath 210 is advanced near to the distal end 230 of the plurality of wires 220, thereby gripping the element 250 within the basket 240.
  • fragmatome equipment is inserted into the lumen configured within the sheath 210 and advanced into the posterior or anterior chamber of the eye proximal to the element 250 to emulsify the element 250 that is firmly held within the basket 240. After emulsifying the element 250, the retrieval device 200 is removed from the eye.
  • At least two adjacent wires of the plurality of wires 220 are interconnected by a wire mesh 221 to securely capture the element that is to be retrieved from the eye. More specifically, the number of plurality of wires 220 forming the basket 240 on one side is attached to each other by multiple smaller branches of the nitinol alloy to cover l/4th area of the basket 240, thereby preventing the escape of the captured element 250 from the basket 240 and also facilitating the emulsification of the element 250 using the fragmatome equipment without dropping any part of the element 250 inside the posterior chamber of the eye.
  • the lumen inside the sheath 210 is constructed in such a way as to allow the passage of fragmatome equipment 260 therethrough to facilitate the emulsification of the element within the basket 240.
  • the lumen inside the sheath 210 is constructed in such a way that an endo-illumination probe or light source 270 can be placed inside to allow illumination of the posterior segment of the eye to enable easy capture of the element 250 without the need for an extra port for the illumination probe.
  • the configuration of the sheath 210 encapsulating the plurality of wires 220 has an angulation 280 to aid in the capture of the element 250 through the anterior chamber route without compromising on the structural integrity of the anterior chamber of the eye.
  • the number of wires in the plurality of wires 220 is four.
  • the plurality of wires 220 includes a first set of wires (not exclusively labelled in figures) and a second set of wires (not exclusively labelled in figures).
  • the first set and the second set of wires are defined by two wires which are spaced 180° apart with respect to each other, such that all the wires of the first set and the second set of wires are spaced 90° apart from each other.
  • the first set of wires is adapted to move in tandem with the second set of wires to facilitate the opening and closing of the retrieval basket 240, thereby allowing the capture and retrieval of the element from the eye.
  • the plurality of wires 220 forming the basket 240 is constructed in a way such that two wires placed at a fixed 180 degree angle, i.e. horizontally placed, which is capable of opening or closing in tandem with another set of 2 wires which are placed 90 degree away from the other wires whereby this part of the 2 wires placed 90 degree away will be able to rotate on its axis from an initial resting position of 180 degree with the other 2 wires and come to its final position from that place to 90 degrees away by turning a wheel that is placed at the proximal end of the sheath which is made for that particular process.
  • 2 wires will be able to rotate on its axis to reach 90 degrees angle away from its primary position, and open and close in tandem with the other 2 wires.
  • Such arrangement is used to hold or to break or to snare the dislocated lens in the anterior chamber of the eye.
  • the retrieval device 200 can retrieve a biological element, a foreign body, a metallic or non- metallic element from within the eye without any complications to the structure of the eye.
  • the present disclosure described herein above has several technical advantages including, but not limited to, the realization of a retrieval device for removing an element from an eye and method of retrieval that: • is used to remove the dislocated lens as well as any metallic or non-metallic foreign body from within the eye;

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  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Public Health (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Vascular Medicine (AREA)
  • Ophthalmology & Optometry (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Physics & Mathematics (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgical Instruments (AREA)

Abstract

L'invention se situe dans le domaine de l'ophtalmologie et concerne un dispositif d'extraction pour retirer un élément de l'œil et un procédé d'extraction. Le dispositif d'extraction et le procédé d'extraction sont utilisés pour retirer tout élément à l'intérieur de l'œil. Le dispositif et le procédé n'entraînent aucune complication à la structure de l'œil. Le dispositif d'extraction comprend une pluralité de fils et une gaine. La pluralité de fils est connectée à une extrémité opérationnelle de celle-ci définissant une extrémité émoussée. La gaine est conçue pour recouvrir partiellement la pluralité de fils. La gaine et la pluralité de fils sont mobiles l'un par rapport à l'autre, facilitant ainsi la formation d'un panier d'extraction à l'extrémité émoussée. On fait varier la taille du panier d'extraction en déplaçant la gaine sur la pluralité de fils en fonction de la taille de l'élément à extraire de l'œil.
PCT/IB2016/055034 2016-07-02 2016-08-24 Dispositif d'extraction pour retirer un élément d'un œil et procédé d'extraction Ceased WO2018007859A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN201641022826 2016-07-02
IN201641022826 2016-07-02

Publications (1)

Publication Number Publication Date
WO2018007859A1 true WO2018007859A1 (fr) 2018-01-11

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PCT/IB2016/055034 Ceased WO2018007859A1 (fr) 2016-07-02 2016-08-24 Dispositif d'extraction pour retirer un élément d'un œil et procédé d'extraction

Country Status (1)

Country Link
WO (1) WO2018007859A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109998652A (zh) * 2019-05-05 2019-07-12 万乘驿 兜网式固定装置
CN110013293A (zh) * 2019-05-05 2019-07-16 熊璐嘉 兜网式取异物装置及其方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6217589B1 (en) * 1999-10-27 2001-04-17 Scimed Life Systems, Inc. Retrieval device made of precursor alloy cable and method of manufacturing
US20070016225A1 (en) * 2005-07-15 2007-01-18 Nakao Naomi L Endoscope retrieval instrument assembly
US20120083793A1 (en) * 2010-10-04 2012-04-05 Foster William J Method for removal of retained lens fragments using small diameter fragmatome
US9101342B2 (en) * 2011-07-22 2015-08-11 Rafic Saleh Surgical retrieval apparatus and method with semi-rigidly extendable and collapsible basket

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6217589B1 (en) * 1999-10-27 2001-04-17 Scimed Life Systems, Inc. Retrieval device made of precursor alloy cable and method of manufacturing
US20070016225A1 (en) * 2005-07-15 2007-01-18 Nakao Naomi L Endoscope retrieval instrument assembly
US20120083793A1 (en) * 2010-10-04 2012-04-05 Foster William J Method for removal of retained lens fragments using small diameter fragmatome
US9101342B2 (en) * 2011-07-22 2015-08-11 Rafic Saleh Surgical retrieval apparatus and method with semi-rigidly extendable and collapsible basket

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109998652A (zh) * 2019-05-05 2019-07-12 万乘驿 兜网式固定装置
CN110013293A (zh) * 2019-05-05 2019-07-16 熊璐嘉 兜网式取异物装置及其方法

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