WO2022237037A1 - 夹持器械 - Google Patents

夹持器械 Download PDF

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Publication number
WO2022237037A1
WO2022237037A1 PCT/CN2021/119287 CN2021119287W WO2022237037A1 WO 2022237037 A1 WO2022237037 A1 WO 2022237037A1 CN 2021119287 W CN2021119287 W CN 2021119287W WO 2022237037 A1 WO2022237037 A1 WO 2022237037A1
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WO
WIPO (PCT)
Prior art keywords
clamping
arm
seat
main
locking structure
Prior art date
Application number
PCT/CN2021/119287
Other languages
English (en)
French (fr)
Inventor
胡贯朋
徐军
林林
Original Assignee
上海汇禾医疗科技有限公司
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 上海汇禾医疗科技有限公司 filed Critical 上海汇禾医疗科技有限公司
Priority to EP21941604.7A priority Critical patent/EP4338707A1/en
Priority to US18/548,018 priority patent/US20240225835A9/en
Priority to CA3210047A priority patent/CA3210047A1/en
Publication of WO2022237037A1 publication Critical patent/WO2022237037A1/zh

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    • 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
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
    • A61F2/2442—Annuloplasty rings or inserts for correcting the valve shape; Implants for improving the function of a native heart valve
    • A61F2/246—Devices for obstructing a leak through a native valve in a closed condition
    • 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
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
    • 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
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
    • A61F2/2442—Annuloplasty rings or inserts for correcting the valve shape; Implants for improving the function of a native heart valve

Definitions

  • the embodiments of the present application relate to the technical field of medical devices, in particular to a clamping device.
  • Mitral valve, tricuspid valve, aortic valve, pulmonary valve and other common diseases are valvular insufficiency.
  • mitral valve Taking the mitral valve as an example, during systole, part of the blood of the left ventricle flows to the left atrium through the insufficient mitral valve orifice. reflux.
  • the left atrium receives blood from the left ventricular regurgitation and blood from the pulmonary vein at the same time, and the blood volume and pressure of the left atrium increase significantly, resulting in left atrial hypertrophy.
  • the present application provides a clamping instrument that can provide reliable clamping force and is suitable for clamping different target tissues.
  • the present application provides a clamping device, which includes a locking structure, which can be switched between a locked state and an unlocked state; and a plurality of clamping structures, each of which is connected to the lock
  • the clamping structure can be linked with the switching action of the locking structure to adjust the clamping angles formed by each clamping structure; wherein, each clamping angle formed by adjusting each clamping structure angle, so that each clamping structure clamps or releases each target tissue; and wherein, when the locking structure is in the locking state, the locking structure can exert force on each clamping structure
  • the continuous resisting force keeps the clamping angles formed by the clamping structures to a minimum, thereby clamping the target tissues.
  • each of the clamping structures is respectively used to clamp target tissues; the target tissues include heart valves.
  • the clamping instrument further includes a mandrel
  • the locking structure includes a clamping seat and an adjusting seat coaxially arranged on the mandrel, each of the clamping structures is respectively connected to the clamping seat and the adjusting seat; wherein, when the locking structure is gradually switched from the unlocked state to the locked state, the distance between the clamping seat and the adjusting seat is gradually reduced, each The pivot angle between the clamping structure and the mandrel is gradually reduced.
  • the clamping seat is movably arranged on the mandrel and can move back and forth along the axial direction of the mandrel; the adjusting seat is fixed on the mandrel.
  • the locking structure further includes a first buckle and a second buckle respectively disposed on the clamping seat and the adjustment seat; wherein, the first buckle and the second buckle The two buckles can be engaged with each other, so that the locking structure is maintained in the locked state; and wherein, after the first buckle and the second buckle are engaged with each other, the At least a portion of the mandrel may remain in the holding instrument, or the mandrel may be completely withdrawn from the holding instrument.
  • each of the clamping structures includes a main clamping arm, an auxiliary clamping arm and an elastic arm; the main clamping arm and the auxiliary clamping arm are respectively pivoted to the clamping seat, and the opposite two sides of the elastic arms
  • the adjustment seat and the main clamp arm are respectively pivotally connected; wherein, when the locking structure performs the switching action between the locked state and the unlocked state, the clamping seat and the The distance between the adjustment seats can be increased or reduced, so as to drive each of the main clip arms to pivot relative to the clamping seats via the elastic arm; when the locking structure is maintained in the locked state
  • a continuous elastic resisting force can be applied to each of the main clamping arms through each of the elastic arms, so as to urge each of the main clamping arms to pivot in a direction close to the auxiliary clamping arm relative to the clamping seat, so that The clamping angle formed between the primary clamp arm and the secondary clamp arm is kept to a minimum.
  • the main clamping arm can apply a reverse force to the elastic arm according to the thickness of the target tissue, so that the elastic arm produces different degree of elastic deformation until the elastic resisting force of the elastic arm reaches a balance with the opposing force of the main clip arm.
  • the elastic arm includes at least one of an arcuate bent portion, an S-shaped bent portion, and a Z-shaped bent portion.
  • each of the main clamping arms and/or the auxiliary clamping arms can be coaxially or non-coaxially pivoted to the clamping seat.
  • the auxiliary clamping arm can be elastically deformed under a stressed state to pivot relative to the clamping seat in a direction away from the main clamping arm, so that the The clamping angle between the main clamping arms is increased; the auxiliary clamping arm can be elastically restored in a non-stressed state to pivot relative to the clamping seat in a direction close to the main clamping arm, so that the forming The clamping angle between the auxiliary clamp arm and the main clamp arm becomes smaller.
  • the auxiliary clamping arm includes a clamping part and a pivoting part, and the clamping part can be pivotally connected to the mandrel or the clamping seat via the pivoting part; the pivoting part can be Elastically deform in a stressed state and elastically recover in a non-stressed state for the clamping portion to pivot relative to the clamping seat.
  • each of the auxiliary clamping arms has an integrated structure or a separate structure.
  • the clamping instrument of the embodiment of the present application applies a continuous thrust force to the clamping structure by means of the locking structure in the locked state, so that the clamping angle formed by each clamping structure is kept to a minimum, For the clamping structure to maintain a reliable and stable clamping force.
  • the main clamping arm of the clamping structure can apply a reverse force to the elastic arm according to the thickness of the target tissue, so that the elasticity can be different. Elastic deformation to a certain degree until the elastic resisting force of the elastic arm reaches a balance with the opposing force of the main clamp arm.
  • the clamping structure is suitable for clamping target tissues of different thicknesses.
  • FIG. 1A to FIG. 1B are schematic three-dimensional structure diagrams of different embodiments of the clamping instrument of the present application.
  • Fig. 2 is a schematic diagram of an exploded structure of the clamping device of the present application.
  • FIG. 3 and FIG. 4 are structural schematic diagrams of the locking structure of the clamping instrument of the present application in an unlocked state and a locked state, respectively.
  • Fig. 5 and Fig. 6 are side cross-sectional views of the locking structure of the clamping instrument of the present application in an unlocked state and a locked state, respectively.
  • FIG. 7 and 8 are partial schematic diagrams of the adjusting seat and the clamping seat of the present application, respectively.
  • 9 and 10 are partial schematic diagrams of the auxiliary clamping arms of the present application, respectively.
  • Fig. 11 and Fig. 12 are respectively schematic diagrams of different embodiments of the clamping instrument of the present application.
  • Fig. 13 to Fig. 17 are schematic diagrams of embodiments of heart leaflet repair operation performed by using the clamping instrument of the present application.
  • 10 Clamping device; 20: Mandrel; 22: Connection interface: 30: Locking structure; 32: Clamping seat; 322: Pivoting shaft; 324: Piercing slot; 34: Adjusting seat; 342: Pivoting hole ;36: first buckle; 38: second buckle; 40: clamping structure; 42: main clamp arm; 422: top pivot hole; 424: middle pivot hole; 44: elastic arm; 442: 444: the second pivot hole; 46: the auxiliary clip arm; 462: the clamping part; 464: the pivot part. 466: piercing part; 52: pivot shaft; 54: pivot shaft; 60: target tissue; 70: delivery system; 80: pull wire.
  • the clipping device 10 of this embodiment can be used as an edge-to-edge repair implant in the field of interventional treatment of structural heart disease, and it can reach a designated anatomical position through a minimally invasive transvascular approach or transatrial appendage to achieve heart leaflet repair. .
  • the clamping instrument 10 of the present application mainly includes a locking structure 30 and a plurality of clamping structures 40 .
  • the locking structure 30 can switch between a locked state and an unlocked state.
  • Each clamping structure 40 is connected to the locking structure 30 and can be linked with the switching action of the locking structure to adjust the clamping angles formed by each clamping structure 40 .
  • each clamping angle formed by each clamping structure 40 can be adjusted so that each clamping structure 40 can clamp or release each target tissue.
  • each clamping structure 40 when the locking structure 30 is in the locked state, the locking structure 30 can apply a continuous thrust force to each clamping structure 40, so that the clamping angle formed by each clamping structure 40 can be kept to a minimum. Therefore, each clamping structure 40 is provided to maintain a stable clamping force to clamp each target tissue (that is, the state shown in FIG. 4 and FIG. 6 ).
  • the target tissue is, for example, a heart valve, including but not limited to a mitral valve, a tricuspid valve, and the like.
  • the clamping instrument 10 may also include a mandrel 20 (refer to FIG. 1B ), and the locking structure 30 may include a clamping seat 32 and an adjusting seat 34 coaxially arranged on the mandrel 20, wherein each clamping structure 40 are connected to the clamping seat 32 and the adjusting seat 34 respectively.
  • the distance between the clamping seat 32 and the adjusting seat 34 is gradually reduced, so that the distance between each clamping structure 40 and the mandrel 20
  • the pivot angle gradually decreases thereupon, that is, the free end of the clamping structure 40 moves toward the direction close to the mandrel 20 (refer to the state shown in FIG.
  • the clamping seat 32 can be movably arranged on the mandrel 20 (for example, it can be movably passed through the mandrel 20), and the adjusting seat 34 can be fixed at the end of the mandrel 20, and the clamping seat can be used to 32 reciprocates along the axial direction of the mandrel 20 to adjust the distance between the clamping seat 32 and the adjusting seat 34 , and then drives the clamping structure 40 to pivot relative to the mandrel 20 .
  • the locking structure 30 may further include a first locking member 36 and a second locking member 38 respectively disposed on the clamping seat 32 and the adjusting seat 34 (refer to FIG. 7 and FIG. 8 ).
  • first buckle 36 and the second buckle 38 can be engaged with each other to maintain the locking structure 30 in a locked state.
  • the first buckle 36 may include two hooks disposed on opposite sides of the adjustment seat 34
  • the second buckle 38 may include two hooks disposed on opposite sides of the clamping seat 32 . card slot.
  • the first buckle 36 and the second buckle 38 can also be realized by using other buckle structures, which is not limited in this application.
  • the mandrel 20 is a detachable structural design, which is mainly used to provide axial positioning between the clamping seat 32 and the adjusting seat 34 during the clamping instrument 10 performing the clamping process of the target tissue. It is used for position alignment between the first buckle part 36 and the second buckle part 38 and the engaging operation.
  • the mandrel 20 can be selected to be completely withdrawn from the clamping device 10 according to actual use requirements (refer to FIG. 1A ). state shown), or choose to completely indwell the mandrel 20 in the clamping instrument 10 to further improve the clamping stability of the clamping instrument 10 (refer to the state shown in FIG. 1B ).
  • the mandrel 20 can be designed as a component fixed in the clamping instrument 10 .
  • a part of the delivery system can also be used as the mandrel 20 of the clamping device 10 to assist the clamping device 10 to perform the clamping operation of the target tissue, and after the clamping operation of the target tissue is completed, the mandrel 20 can be detached from holding device 10 and removed with the delivery system.
  • connection interface 22 can also be designed on the mandrel 20, so that the holding device 10 can be detachably connected to the delivery system (Refer to the detailed description below regarding FIGS. 13 to 17).
  • each clamping structure 40 includes a main clamping arm 42 , an elastic arm 44 , and an auxiliary clamping arm 46 .
  • each main clamping arm 42 and each auxiliary clamping arm 46 can be pivotally connected to the clamping seat 32 , and opposite ends of each elastic arm 44 are respectively pivotally connected to the adjusting seat 34 and the main clamping arm 42 .
  • the top pivot holes 422 of each main clamp arm 42 are pivotally connected to the pivot shaft 322 of the clamping seat 32 , and first pivot holes are respectively provided at opposite ends of each elastic arm 44 .
  • the connection hole 442 and the second pivot hole 444 wherein the first pivot hole 442 of the elastic arm 44 is pivotally connected with the middle pivot hole 424 of the main clamp arm 42 via the pivot shaft 52, and the second pivot hole 44 of the elastic arm 44 is pivotally connected.
  • the hole 444 is pivotally connected to the pivot hole 342 of the adjustment base 34 via the pivot shaft 54 .
  • each main clamping arm 42 can be driven to pivot relative to the clamping base 32 via the elastic arm 44, so that each main clamping arm Each pivot angle between 42 and the mandrel 20 gradually decreases (refer to the state shown in FIG.
  • a continuous elastic resisting force can be applied to each main clamp arm 42 through each elastic arm 44 to promote each main clamp arm 42 to approach the auxiliary clamping arm 42 relative to the clamping seat 32 .
  • the direction of the clamping arm 46 is pivoted so that the clamping angle formed between the main clamping arm 42 and the auxiliary clamping arm 46 is kept to a minimum.
  • the main clamping arm 42 can also apply a reverse force to the elastic arm 44 according to the thickness of the target tissue it clamps, so that the elastic arm 44 produces different degrees of elastic deformation. , until the elastic resisting force of the elastic arm 44 and the opposing force of the main clamp arm 42 reach a balance.
  • the main clamping arms 42 and the elastic arms 44 can be adaptively adjusted according to the actual thickness of the currently clamped target tissue, so that each main clamping arm 42 and the mandrel 20 to form different minimum pivoting angles, this design can not only provide the clamping instrument 10 of the present application suitable for clamping target tissues of different thicknesses, but also ensure that target tissues of various thicknesses can be effectively clamped, Thereby further improving the success rate of heart leaf valve repair surgery.
  • the elastic arm 44 includes an S-shaped bending portion (refer to FIG. 1 to FIG. 6 ), an arcuate bending portion (refer to FIG. 11 ) or a Z-shaped bending portion (refer to FIG. 12 ).
  • the above-mentioned elastic arm 44 may also be realized by using a spring structure (not shown).
  • the elastic arm 44 can be made of nickel-titanium alloy material, but not limited thereto, and can also be made of other elastic materials, which is not limited in this application.
  • each main clamping arm 42 of each clamping structure 40 may be connected to the clamping seat 32 in a coaxial pivotal manner or a non-coaxial pivotal manner.
  • auxiliary clamping arm 46 and the main clamping arm 42 can pivot independently relative to the clamping seat 32 to adjust the clamping angle formed between the auxiliary clamping arm 46 and the main clamping arm 42, so as to clamp Hold or release target tissue (e.g. heart valves).
  • Hold or release target tissue e.g. heart valves
  • the auxiliary clamp arm 46 can be elastically deformed in a stressed state, so as to pivot in a direction away from the main clamp arm 42 relative to the clamp seat 32, so that a The clamping angle increases; the auxiliary clamp arm 46 can also be elastically restored in a non-stressed state, so as to pivot toward the direction close to the main clamp arm 42 relative to the clamp seat 32, so that the clamping arm 46 formed on the main clamp arm 46 and the main The clamping angle between the clamping arms 42 becomes smaller.
  • the auxiliary clamping arm 46 may include a clamping portion 462 and a pivot portion 464 , wherein the clamping portion 462 may be pivotally connected to the clamping seat 32 via the pivotal portion 464 .
  • each auxiliary clamping arm 46 of each clamping structure 40 can be designed as an integral structure or as a separate structure.
  • each auxiliary clamping arm 46 of each clamping structure 40 is an integrated design structure, and each auxiliary clamping arm 46 can pass through the core through the piercing part 466. on the shaft 20, and each clamping portion 462 of each auxiliary clamping arm 46 can extend outwards through each piercing groove 324 of the clamping seat 32, and pivot relative to the clamping seat 32 using each piercing groove 324 as a rotating shaft (Refer to Figure 2, Figure 8).
  • auxiliary clamp arm 46 is not limited to that shown in the drawings of this application, those skilled in the art can adopt any other equivalent design scheme under the technical inspiration of this application, and this application does not make any limit.
  • the pivoting portion 464 can be elastically deformed under a stressed state, so that the clamping portion 462 can pivot relative to the clamping seat 32 in a direction away from the main clamping arm 42, so that the main clamping arm 42 and the auxiliary clamping
  • the clamping angle between the arms 46 (clamping portion 462 ) increases; alternatively, the pivotal portion 464 can also be elastically restored in a non-stressed state, so that the clamping portion 462 approaches the main clamp relative to the clamping seat 32
  • the direction of the arm 42 is pivoted, so that the clamping angle between the main clamping arm 42 and the auxiliary clamping arm 46 (clamping portion 462 ) becomes smaller for clamping the target tissue.
  • the free end of the auxiliary clamp arm 46 can be connected to a driver (such as a pull wire 80), and the free end of the auxiliary clamp arm 46 can be pulled by the driver to make the auxiliary clamp arm
  • the pivoting portion 464 of 46 is elastically deformed (refer to FIG. 10 ) for the clamping portion 462 to pivot relative to the clamping seat 32 , so that the clamping angle between the auxiliary clamping arm 46 and the main clamping arm 42 increases.
  • the pivotal portion 464 of the auxiliary clamping arm 46 is elastically recovered (refer to FIG. 9 ), so that the clamping portion 462 can pivot relative to the clamping seat 32, so that the auxiliary clamping arm 46 and the main clamping arm 46 can be connected to each other.
  • the clamping angle between the clamping arms 42 becomes smaller.
  • Fig. 13 to Fig. 17 exemplarily describe the method of using the clamping instrument 10 of the present application to perform heart valve repair treatment.
  • the clamping instrument 10 is delivered to the vicinity of the target tissue 60 (eg, heart valve) to be repaired by the delivery system 70 (refer to FIG. 13 ).
  • the target tissue 60 eg, heart valve
  • the adjustment seat 34 of the clamping instrument 10 is controlled by the delivery system 70 to move in the distal direction relative to the clamping seat 32, so that the distance between the adjustment seat 34 and the clamping seat 32 increases, and then the main clamping arm is driven through the elastic arm 44 42 pivots relative to the clamping seat 32 to open, that is, the pivot angle between the main clamp arm 42 and the mandrel 20 increases, and for example, the pull wire 80 connected to the auxiliary clamp arm 46 is aimed at the auxiliary clamp arm 46 Applying a pulling force to keep the auxiliary clamp arm 46 close to the opposite sides of the mandrel 20, so that the clamping angle between the main clamp arm 42 and the auxiliary clamp arm 46 remains large enough to provide the target tissue to be repaired.
  • 60 eg, a heart valve
  • 60 is positioned between primary clamp arm 42 and secondary clamp arm 46 (see FIG. 14 ).
  • the auxiliary clip arm 46 pivots relative to the clamp seat 32 toward the main clamp arm 42 under the action of the elastic restoring force, so that the target tissue 60 (such as a heart valve) is clamped in the main clamp Between the arm 42 and the auxiliary clamp arm 46 (refer to FIG. 15 ).
  • the auxiliary clamping arm 46 can be pulled again through the pull wire 80 to release the clamping between the auxiliary clamping arm 46 and the main clamping arm 42.
  • the target tissue 60 in between, and capture the target tissue 60 again, until the clamping state of the target tissue 60 meets expectations.
  • the adjustment seat 34 of the clamping instrument 10 is controlled to move proximally relative to the clamping seat 32 through the delivery system 70, so that the distance between the adjustment seat 34 and the clamping seat 32 is reduced, and then the main clamp is driven through the elastic arm 44
  • the arm 42 pivots in the opposite direction relative to the clamping seat 32, so that the pivot angle between the main clamp arm 42 and the mandrel 20 gradually decreases, and drives the auxiliary clamp arm 46 to gradually move toward the mandrel 20. Close together until the adjusting seat 34 and the clamping seat 32 engage with each other, that is, the locking structure 30 is in a locked state.
  • the auxiliary clamping arm 46 will be pressed against the clamping seat 32 by the push force of the main clamping arm 42, and at the same time, the main clamping arm 42 can also According to the different thicknesses of the clamped target tissue 60, a reverse force is applied to the elastic arm 44, so that the elastic arm 44 produces different degrees of elastic deformation, until the elastic resisting force applied by the elastic arm 44 to the main clamping arm 42 matches the main clamping force.
  • the opposing force exerted by the arm 42 on the elastic arm 44 is balanced, so as to ensure that the target tissue 60 can be stably and firmly clamped between the main clamping arm 42 and the auxiliary clamping arm 46 .
  • the delivery system 70 and the clamping device 10 are separated from each other, so that the delivery system 70 is withdrawn, and only the clamping device 10 remains in the patient's body, so as to complete the clamping operation of the target tissue 60 (such as a heart valve).
  • the target tissue 60 such as a heart valve
  • the clamping instrument provided by this application applies a continuous thrust force to the clamping structure by means of the locking structure in the locked state, so as to keep the clamping angle formed by each clamping structure to a minimum, so that the clamping
  • the structure can maintain a stable and reliable clamping force, so as to improve the clamping effect and improve the success rate of the treatment of bicuspid and tricuspid regurgitation.
  • the main clamping arm of the clamping structure can also apply a reverse force to the elastic arm according to the actual thickness of the target tissue it clamps, so that the elastic arm produces different degrees of elastic deformation until the elastic resistance of the elastic arm
  • the pushing force is balanced with the opposing force of the main clamping arm, so that it is suitable for clamping target tissues of different thicknesses.

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  • Health & Medical Sciences (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)
  • Surgical Instruments (AREA)

Abstract

一种夹持器械（10），主要包括可在锁紧状态和非锁紧状态之间切换作动的锁紧结构（30），以及连接锁紧结构（30）并可随锁紧结构（30）的切换作动产生联动的多个夹持结构（40），以调节各夹持结构（40）形成的各夹合角度，其中，可通过调节各夹持结构（40）形成的各夹合角度，以供各夹持结构（40）夹持或释放各目标组织；其中，当锁紧结构（30）处于锁紧状态时，可向各夹持结构（40）施加持续的抵推力，使得各夹持结构（40）所形成的各夹合角度维持最小化，从而夹紧各目标组织。

Description

夹持器械
本申请要求在2021年5月11日提交中国专利局、申请号为202110512243.3、发明名称为“夹持器械”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及医疗器械技术领域，尤其涉及一种夹持器械。
背景技术
二尖瓣，三尖瓣，主动脉瓣，肺动脉瓣等常见发病为瓣膜关闭不全，以二尖瓣为例，在心脏收缩期，左心室的一部分血液通过关闭不全的二尖瓣口向左心房反流。左心房同时接收来自左心室反流的血液和肺静脉输入的血液，左心房血容量大幅增加、压力升高，导致左心房肥大。
在心脏舒张期，更多的血液从左心房流向左心室，使左心室因收缩加强而发生肥大，从代偿期演进到失代偿期后，左心房和左心室均发生心力衰竭，进而依次出现肺淤血、肺动脉高压、右心室肥大、右心房肥大、右心衰、体循环淤血。
传统治疗手段包括积极地进行外科手术方法，或姑息性地以药物对抗不可避免的心力衰竭。其中，外科手术方法还包括瓣膜置换术和瓣膜成形术。在外科手术方法中，典型的开胸手术侵入性大，需要建立体外循环，具有较高的并发症发生率和感染风险。患者很多耐受不了巨大的外科风险而只能无奈等待死亡。
目前的经导管治疗二、三尖瓣反流的产品，在治愈过程中大都需要改变心脏的结构，给心脏术后带了具大的压力以及不适应性。因此，亟需一种不需要改变心脏结构，同时又能通过微创路径治疗瓣膜反流的产品。
发明内容
鉴于上述问题，本申请提供一种夹持器械，可提供可靠的夹持力，并可适于夹持不同后的目标组织。
本申请提供一种夹持器械，其包括锁紧结构，其可在锁紧状态和非锁紧状态之间切换作动；以及多个夹持结构，各所述夹持结构分别连接所述锁紧结构并可随所述锁紧结构的所述切换作动产生联动，以调节各所述夹持结构形成的各夹合角度；其中，通过调节各所述夹持结构形成的各所述夹合角度，以供各所述夹持结构夹持或释放各目标组织；且其中，当所述锁紧结构处于所述锁紧状态时，所述锁紧结构可向各所述夹持结构施加持续的抵推力，使得各所述夹持结构所形成的各所述夹合角度维持最小化，从而夹紧各所述目标组织。
可选地，各所述夹持结构分别用于夹持目标组织；所述目标组织包括心脏瓣膜。
可选地，所述夹持器械还包括芯轴，所述锁紧结构包括共轴设于所述芯轴上的夹持座和调节座，各所述夹持结构分别连接所述夹持座和所述调节座；其中，当所述锁紧结构逐渐由所述非锁紧状态切换至所述锁紧状态时，所述夹持座和所述调节座之间的间隔距离逐渐缩小，各所述夹持结构与所述芯轴之间的枢转角度逐渐减小。
可选地，所述夹持座可活动地设于芯轴上并沿可芯轴的轴向往复移动；所述调节座固设于所述芯轴上。
可选地，所述锁紧结构还包括分设于所述夹持座和所述调节座上的第一卡扣件和第二卡扣件；其中，所述第一卡扣件和所述第二卡扣件可相互卡合，以使所述锁紧结构维持于所述锁紧状态；且其中，在所述第一卡扣件和所述第二卡扣件完成相互卡合后，所述芯轴的至少一部分可留置于所述夹持器械中，或者，所述芯轴可完全从所述夹持器械中撤离。
可选地，各所述夹持结构各自包括主夹臂、辅夹臂和弹性臂；所述主夹 臂和所述辅夹臂分别枢接所述夹持座，所述弹性臂的相对两端分别枢接所述调节座与所述主夹臂；其中，当所述锁紧结构在锁紧状态和非锁紧状态之间执行所述切换作动时，所述夹持座和所述调节座之间的间隔距离可增大或缩小，以经由所述弹性臂带动各所述主夹臂相对于所述夹持座枢转；当所述锁紧结构维持于所述锁紧状态时，可经由各所述弹性臂向各所述主夹臂施加持续的弹性抵推力，以促使各所述主夹臂相对于所述夹持座朝接近所述辅夹臂的方向枢转，使得形成于所述主夹臂和所述辅夹臂之间的所述夹合角度维持最小化。
可选地，当所述锁紧结构处于所述锁紧状态时，所述主夹臂可根据所述目标组织的厚度向所述弹性臂施加反向作用力，以使所述弹性臂产生不同程度的弹性变形，直至所述弹性臂的所述弹性抵推力与所述主夹臂的所述反向作用力达到平衡。
可选地，所述弹性臂包括弓形弯折部、S型弯折部、Z型弯折部中的至少一个。
可选地，各所述主夹臂和/或所述辅夹臂可共轴枢接或非共轴枢接至所述夹持座。
可选地，所述辅夹臂可在受力状态下弹性变形，以相对于所述夹持座朝远离所述主夹臂的方向枢转，以使形成于所述辅夹臂和所述主夹臂之间的所述夹合角度增大；所述辅夹臂可在非受力状态下弹性恢复，以相对于夹持座朝接近所述主夹臂的方向枢转，以使形成于所述辅夹臂和所述主夹臂之间的所述夹合角度变小。
可选地，所述辅夹臂包括夹持部和枢接部，所述夹持部可经由所述枢接部枢接所述芯轴或所述夹持座；所述枢接部可在受力状态下弹性变形并在非受力状态下弹性恢复，以供所述夹持部相对于所述夹持座枢转。
可选地，各所述辅夹臂为一体式结构或分离式结构。
由以上技术方案可见，本申请实施例的夹持器械，借由处于锁紧状态下的锁紧结构向夹持结构施加持续的抵推力，使得各夹持结构形成的夹合角度 维持最小化，以供夹持结构维持可靠且稳定的夹持力。
再者，本申请实施例的夹持器械还可在锁紧结构处于锁紧状态时，夹持结构的主夹臂可根据目标组织的厚度向弹性臂施加反向作用力，以使弹性产生不同程度的弹性变形，直至弹性臂的弹性抵推力与主夹臂的反向作用力达到平衡，借由此结构设计，可供夹持结构适于夹持不同厚度的目标组织。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请实施例中记载的一些实施例，对于本领域普通技术人员来讲，还可以根据这些附图获得其他的附图。
图1A至图1B为本申请夹持器械的不同实施例的立体结构示意图。
图2为本申请夹持器械的分解结构示意图。
图3和图4分别为本申请夹持器械的锁紧结构处于非锁紧状态和锁紧状态的结构示意图。
图5和图6分别本申请夹持器械的锁紧结构处于非锁紧状态和锁紧状态的侧面剖视图。
图7和图8分别为本申请的调节座和夹持座的局部示意图。
图9和图10分别为本申请的辅夹臂的局部示意图。
图11和图12分别为本申请的夹持器械的不同实施例示意图。
图13至图17为利用本申请的夹持器械执行心脏叶瓣修复手术的实施例示意图。
元件标号
10：夹持器械；20：芯轴；22：连接接口：30：锁紧结构；32:夹持座；322：枢接轴；324：穿设槽；34：调节座；342：枢接孔；36：第一卡扣件；38：第二卡扣件；40：夹持结构；42：主夹臂；422：顶端枢接孔；424：中段枢接孔；44：弹性臂；442：第一枢接孔；444：第二枢接孔；46：辅夹臂；462： 夹持部；464：枢接部。466：穿设部；52：枢接轴；54：枢接轴；60：目标组织；70：输送系统；80：拉线。
具体实施方式
为了使本领域的人员更好地理解本申请实施例中的技术方案，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本申请实施例一部分实施例，而不是全部的实施例。基于本申请实施例中的实施例，本领域普通技术人员所获得的所有其他实施例，都应当属于本申请实施例保护的范围。
下面将结合本申请实施例附图进一步说明本申请实施例具体实现。
本实施例的夹合器械10可作为结构性心脏病介入治疗领域的缘对缘修复植入体，其能够通过经血管微创入路或者经心耳到达指定解剖位置，实现心脏叶瓣的修复治疗。
如图1A至图6所示，本申请的夹持器械10主要包括锁紧结构30、多个夹持结构40。
锁紧结构30可在锁紧状态和非锁紧状态之间切换作动。
各夹持结构40连接锁紧结构30并可随锁紧结构的切换作动产生联动，以调节各夹持结构40形成的各夹合角度。
于本实施例中，可通过调节各夹持结构40形成的各夹合角度，以供各夹持结构40夹持或释放各目标组织。
于本实施例中，当锁紧结构30由非锁紧状态向锁紧状态切换时(即由图1所示状态向图4所示状态切换时)，各夹持结构40所形成的夹合角度逐渐减小。
于本实施例中，当锁紧结构30处于锁紧状态时，锁紧结构30可向各夹持结构40施加持续的抵推力，以使各夹持结构40形成的夹合角度维持最小化，从而提供各夹持结构40维持稳定的夹持力以夹紧各目标组织(即图4、图6所示状态)。
可选地，目标组织例如为心脏瓣膜，包括但不限于二尖瓣瓣膜、三尖瓣瓣膜等。
可选地，夹持器械10还可包括芯轴20(参考图1B)，锁紧结构30可包括共轴设于芯轴20上的夹持座32和调节座34，其中，各夹持结构40分别连接夹持座32和调节座34。
具体地，当锁紧结构30逐渐由非锁紧状态切换至锁紧状态时，夹持座32和调节座34之间的间隔距离逐渐缩小，使得各夹持结构40与芯轴20之间的枢转角度随之逐渐减小，亦即，夹持结构40的自由端朝接近芯轴20的方向移动(参考图6所示状态)；反之，当锁紧结构30逐渐由锁紧状态切换至非锁紧状态时，夹持座32和调节座34之间的间隔距离逐渐增大，使得各夹持结构40与芯轴20之间的枢转角度随之逐渐增大，亦即，夹持结构40的自由端朝远离芯轴20的方向移动(参考图5所示状态)。
可选地，夹持座32可活动地设置在芯轴20上(例如可活动地穿设于芯轴20)上，调节座34可固设于芯轴20的末端，可借由夹持座32沿芯轴20的轴向往复移动而调节夹持座32和调节座34之间的间隔距离，进而带动夹持结构40相对于芯轴20枢转。
可选地，锁紧结构30还可包括分设于夹持座32和调节座34上的第一卡扣件36和第二卡扣件38(参考图7和图8)。
于本实施例中，第一卡扣件36和第二卡扣件38可相互卡合，以使锁紧结构30维持于锁紧状态。
于本实施例中，第一卡扣件36可包括设于调节座34的相对两侧的两个卡勾，第二卡扣件38可包括设于夹持座32的相对两侧的两个卡槽。但并不以此为限，第一卡扣件36和第二卡扣件38亦可采用其他卡合结构予以实现，本申请对此不做限制。
于本实施例中，芯轴20为可拆卸式结构设计，其主要用于在夹持器械10执行目标组织的夹合过程中，提供夹持座32与调节座34之间进行轴向定位，以供第一卡扣件36和第二卡扣件38之间位置对准并进行卡合操作。
于本实施例中，在第一卡扣件36和第二卡扣件38完成相互卡合后，可根据实际使用需求，选择将芯轴20完全从夹持器械10中撤离(参考图1A所示状态)，或者，选择将芯轴20完全留置在夹持器械10中，以进一步提高夹合器械10的夹持稳定性(参考图1B所示状态)。
于一实施例中，芯轴20可被设计为固设于夹持器械10中的组成部件。
于另一实施例中，也可利用输送系统的一部分作为夹持器械10的芯轴20，以辅助夹持器械10执行目标组织的夹合操作，并完成目标组织的夹合操作后，芯轴20可与夹持器械10分离并随输送系统一并撤除。
于本实施例中，当芯轴20被设计为固设于夹持器械10中的组成部件时，还可在芯轴20上设计连接接口22，以供夹持器械10可拆卸地连接输送系统(参考下述关于图13至图17的详细描述)。
可选地，各夹持结构40各自包括主夹臂42、弹性臂44、辅夹臂46。
于本实施例中，各主夹臂42和各辅夹臂46可枢接至夹持座32，各弹性臂44的相对两端分别枢接调节座34与主夹臂42。
请参阅图2，于本实施例中，各主夹臂42的顶端枢接孔422枢接至夹持座32的枢接轴322上，各弹性臂44的相对两端分别开设有第一枢接孔442和第二枢接孔444，其中，弹性臂44的第一枢接孔442经由枢接轴52与主夹臂42的中段枢接孔424枢接，弹性臂44的第二枢接孔444经由枢接轴54与调节座34的枢接孔342枢接。
于本实施例中，当锁紧结构30在锁紧状态和非锁紧状态之间执行切换作动时，共轴设置于芯轴20上的夹持座32和调节座34之间的间隔距离可增大或减小，其中，夹持座32和调节座34之间的间隔距离减小时，可经由弹性臂44带动各主夹臂42相对于夹持座32枢转，使得各主夹臂42与芯轴20之间的各枢转角度逐渐减小(参考图6所示状态)，反之，当夹持座32和调节座34之间的间隔距离逐渐增大时，可经由弹性臂44带动各主夹臂42相对于夹持座32枢转，以使各主夹臂42与芯轴20之间的各枢转角度逐渐增大(参考图5所示状态)。
再者，当锁紧结构30维持于锁紧状态时，可经由各弹性臂44向各主夹臂42施加持续的弹性抵推力，以促使各主夹臂42相对于夹持座32朝接近辅夹臂46的方向枢转，使得形成于主夹臂42和辅夹臂46之间的夹合角度维持最小化，借由此结构设计，可以使得本申请的夹持器械10能够提供长久稳定且可靠的夹持力，可有效提高心脏叶瓣修复手术的成功率。
另外，当锁紧结构30处于锁紧状态时，主夹臂42还可根据其所夹持的目标组织的厚度向弹性臂44施加反向作用力，以使弹性臂44产生不同程度的弹性变形，直至弹性臂44的弹性抵推力与主夹臂42的反向作用力达到平衡。
也就是说，在锁紧结构30处于锁紧状态时，主夹臂42和弹性臂44可根据当前所夹持的目标组织的实际厚度而进行自适应调节，使得各主夹臂42与芯轴20之间形成不同的最小枢转角度，此设计不仅可提供本申请的夹持器械10适于夹持不同厚度的目标组织，亦可确保各种厚度的目标组织均能被有效地夹紧，从而进一步提高心脏叶瓣修复手术的成功率。
于本实施例中，弹性臂44包括S型弯折部(参考图1至图6)、弓形弯折部(参考图11)或Z型弯折部(参考图12)。
于其他实施例中，上述弹性臂44也可采用弹簧结构(未示出)来实现。
可选地，弹性臂44可由镍钛合金材料制成，但并不以此为限，亦可采用其他弹性材料制成，本申请对此不作限制。
可选地，各夹持结构40的各主夹臂42可为共轴枢接方式或者非共轴枢接方式连接夹持座32。
于本实施例中，辅夹臂46和主夹臂42可分别独立地相对于夹持座32枢转，以调节形成于辅夹臂46和主夹臂42之间的夹合角度，借以夹持或释放目标组织(例如心脏瓣膜)。
可选地，辅夹臂46可在受力状态下弹性变形，以相对于夹持座32朝远离主夹臂42的方向枢转，以使形成于辅夹臂46和主夹臂42之间的夹合角度增大；辅夹臂46也可在非受力状态下弹性恢复，以相对于夹持座32朝接近 主夹臂42的方向枢转，以使形成于辅夹臂46和主夹臂42之间的夹合角度变小。
可选地，辅夹臂46可包括夹持部462和枢接部464，其中，夹持部462可经由枢接部464枢接夹持座32上。
可选地，各夹持结构40的各辅夹臂46可设计为一体式结构或设计为分离式结构。
例如，于图2、图9和图10所示的实施例中，各夹持结构40的各辅夹臂46为一体式设计结构，各辅夹臂46可通过穿设部466穿设于芯轴20上，且各辅夹臂46的各夹持部462可经由夹持座32的各穿设槽324向外延伸，并以各穿设槽324作为转轴相对于夹持座32进行枢转(参考图2、图8)。
需说明的是，辅夹臂46的设置方式并不以本申请各附图所示为限，本领域技术人员可在本申请的技术启示下采用其他任何等效设计方案，本申请对此不作限制。
于本实施例中，枢接部464可在受力状态下弹性变形，以供夹持部462相对于夹持座32朝远离主夹臂42的方向枢转，使得主夹臂42与辅夹臂46(夹持部462)之间的夹合角度增大；或者，枢接部464也可在非受力状态下弹性恢复，以供夹持部462相对于夹持座32朝接近主夹臂42的方向枢转，使得主夹臂42与辅夹臂46(夹持部462)之间的夹合角度变小，以供夹合目标组织。
请配合参考图5和图6，于本实施例中，辅夹臂46的自由端可连接驱动件(例如拉线80)，经由驱动件牵拉辅夹臂46的自由端，可令辅夹臂46的枢接部464产生弹性变形(参考图10)，以供夹持部462相对于夹持座32枢转，使得辅夹臂46与主夹臂42之间的夹合角度增大。或者，通过释放驱动件，以令辅夹臂46的枢接部464产生弹性恢复(参考图9)，以供夹持部462相对于夹持座32枢转，从而使得辅夹臂46与主夹臂42之间的夹合角度变小。
以下将配合参阅图13至图17示例性描述利用本申请的夹持器械10执行 心脏瓣膜修复治疗的使用方法。
通过输送系统70将夹持器械10输送至待修复的目标组织60(例如心脏瓣膜)附近(参考图13)。
通过输送系统70控制夹持器械10的调节座34相对于夹持座32朝远端方向移动，使得调节座34与夹持座32之间的间隔距离增加，进而经由弹性臂44驱动主夹臂42相对于夹持座32枢转而打开，亦即，主夹臂42与芯轴20之间的枢转角度增大，并通过例如连接于辅夹臂46上的拉线80针对辅夹臂46施加牵拉作用力，以保持辅夹臂46紧贴于芯轴20的相对两侧，使得主夹臂42与辅夹臂46之间的夹合角度维持足够大，从而提供待修复的目标组织60(例如心脏瓣膜)定位于主夹臂42和辅夹臂46之间(参考图14)。
通过释放拉线80以使辅夹臂46在弹性恢复力的作用下相对于夹持座32朝接近主夹臂42的方向枢转，以使目标组织60(例如心脏瓣膜)被夹持在主夹臂42和辅夹臂46之间(参考图15)。
需说明的是，于此操作过程中，若目标组织60的夹持位置不理想时，可通过拉线80再次牵拉辅夹臂46，以释放夹持于辅夹臂46和主夹臂42之间的目标组织60，并重新捕捉目标组织60，直至目标组织60的夹持状态满足预期。
通过输送系统70控制夹持器械10的调节座34相对于夹持座32朝近端方向移动，使得调节座34与夹持座32之间的间隔距离减小，进而经由弹性臂44驱动主夹臂42相对于夹持座32反向枢转，以使主夹臂42与芯轴20之间的枢转角度逐渐减小，并带动辅夹臂46随之一并向芯轴20的方向逐渐靠拢，直至调节座34与夹持座32相互卡合，亦即，锁紧结构30处于锁紧状态。
于理想状态下，当锁紧结构30处于此锁紧状态时，辅夹臂46将受到主夹臂42的抵推力紧紧地抵靠在夹持座32上，同时，主夹臂42还可根据被夹持的目标组织60的不同厚度向弹性臂44施加反向作用力，以使弹性臂44产生不同程度的弹性变形，直至弹性臂44向主夹臂42施加的弹性抵推力与 主夹臂42向弹性臂44施加的反向作用力达到平衡，从而确保目标组织60可被稳定且牢固的夹持在主夹臂42和辅夹臂46之间。
将输送系统70与夹持器械10相互解离，以将输送系统70撤出，而仅保留夹持器械10于患者体内，从而完成目标组织60(例如心脏瓣膜)的夹合操作。
综上所述，本申请提供的夹持器械借由处于锁紧状态的锁紧结构向夹持结构施加持续的抵推力，以令各夹持结构形成的夹合角度维持最小化，使得夹持结构可维持稳定且可靠的夹持力，以提高夹持效果并提升二、三尖瓣反流治疗手术的成功率。
再者，夹持结构的主夹臂亦可根据其所夹持的目标组织的实际厚度而向弹性臂施加反向作用力，以令弹性臂产生不同程度的弹性变形，直至弹性臂的弹性抵推力与主夹臂的反向作用力达到平衡，从而适于夹持不同厚度的目标组织。
最后应说明的是：以上实施例仅用以说明本申请实施例的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。

Claims (12)

  1. 一种夹持器械，其特征在于，包括：
    锁紧结构，其可在锁紧状态和非锁紧状态之间切换作动；以及
    多个夹持结构，各所述夹持结构分别连接所述锁紧结构并可随所述锁紧结构的所述切换作动产生联动，以调节各所述夹持结构形成的各夹合角度；
    其中，通过调节各所述夹持结构形成的各所述夹合角度，以供各所述夹持结构夹持或释放各目标组织；
    且其中，当所述锁紧结构处于所述锁紧状态时，所述锁紧结构可向各所述夹持结构施加持续的抵推力，使得各所述夹持结构所形成的各所述夹合角度维持最小化，从而夹紧各所述目标组织。
  2. 根据权利要求1所述的夹持器械，其特征在于，所述目标组织包括心脏瓣膜。
  3. 根据权利要求2所述的夹持器械，其特征在于，所述夹持器械还包括芯轴，所述锁紧结构包括共轴设于所述芯轴上的夹持座和调节座，各所述夹持结构分别连接所述夹持座和所述调节座；
    其中，当所述锁紧结构逐渐由所述非锁紧状态切换至所述锁紧状态时，所述夹持座和所述调节座之间的间隔距离逐渐缩小，各所述夹持结构与所述芯轴之间的枢转角度逐渐减小。
  4. 根据权利要求3所述的夹持器械，其特征在于，所述夹持座可活动地设于芯轴上并沿可芯轴的轴向往复移动；所述调节座固设于所述芯轴上。
  5. 根据权利要求4所述的夹持器械，其特征在于，所述锁紧结构还包括分设于所述夹持座和所述调节座上的第一卡扣件和第二卡扣件；
    其中，所述第一卡扣件和所述第二卡扣件可相互卡合，以使所述锁紧结构维持于所述锁紧状态；
    且其中，在所述第一卡扣件和所述第二卡扣件完成相互卡合后，所述芯轴的至少一部分可留置于所述夹持器械中，或者，所述芯轴可完全从所述夹持器械中撤离。
  6. 根据权利要求5所述的夹持器械，其特征在于，各所述夹持结构各自包括主夹臂、辅夹臂和弹性臂；
    所述主夹臂和所述辅夹臂分别枢接所述夹持座，所述弹性臂的相对两端分别枢接所述调节座与所述主夹臂；
    其中，当所述锁紧结构在所述锁紧状态和所述非锁紧状态之间执行所述切换作动时，所述夹持座和所述调节座之间的间隔距离可增大或减小，以经由所述弹性臂带动各所述主夹臂相对于所述夹持座枢转；
    当所述锁紧结构维持于所述锁紧状态时，可经由各所述弹性臂向各所述主夹臂施加持续的弹性抵推力，以促使各所述主夹臂相对于所述夹持座朝接近所述辅夹臂的方向枢转，使得形成于所述主夹臂和所述辅夹臂之间的所述夹合角度维持最小化。
  7. 根据权利要求6所述的夹持器械，其特征在于，当所述锁紧结构处于所述锁紧状态时，所述主夹臂可根据所述目标组织的厚度向所述弹性臂施加反向作用力，以使所述弹性臂产生不同程度的弹性变形，直至所述弹性臂的所述弹性抵推力与所述主夹臂的所述反向作用力达到平衡。
  8. 根据权利要求7所述的夹持器械，其特征在于，所述弹性臂包括弓形弯折部、S型弯折部、Z型弯折部中的至少一个。
  9. 根据权利要求6所述的夹持器械，其特征在于，各所述主夹臂可共轴枢接或非共轴枢接至所述夹持座。
  10. 根据权利要求6所述的夹持器械，其特征在于，
    所述辅夹臂可在受力状态下弹性变形，以相对于所述夹持座朝远离所述主夹臂的方向枢转，以使形成于所述辅夹臂和所述主夹臂之间的所述夹合角度增大；
    所述辅夹臂可在非受力状态下弹性恢复，以相对于所述夹持座朝接近所述主夹臂的方向枢转，以使形成于所述辅夹臂和所述主夹臂之间的所述夹合角度变小。
  11. 根据权利要求10所述的夹持器械，其特征在于，所述辅夹臂包括夹持部和枢接部，所述夹持部可经由所述枢接部枢接所述夹持座；
    所述枢接部可在受力状态下弹性变形并在非受力状态下弹性恢复，以供所述夹持部相对于所述夹持座枢转。
  12. 根据权利要求10所述的夹持器械，其特征在于，各所述辅夹臂为一体式结构或分离式结构。
PCT/CN2021/119287 2021-05-11 2021-09-18 夹持器械 WO2022237037A1 (zh)

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