WO2022095725A1 - 一种止血夹 - Google Patents

一种止血夹 Download PDF

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Publication number
WO2022095725A1
WO2022095725A1 PCT/CN2021/125599 CN2021125599W WO2022095725A1 WO 2022095725 A1 WO2022095725 A1 WO 2022095725A1 CN 2021125599 W CN2021125599 W CN 2021125599W WO 2022095725 A1 WO2022095725 A1 WO 2022095725A1
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WO
WIPO (PCT)
Prior art keywords
tube
assembly
distal end
tightening tube
hemostatic clip
Prior art date
Application number
PCT/CN2021/125599
Other languages
English (en)
French (fr)
Inventor
杨雪峰
江路
汪振
王泉斌
Original Assignee
微创优通医疗科技(嘉兴)有限公司
微创优通医疗科技（上海）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 微创优通医疗科技(嘉兴)有限公司, 微创优通医疗科技（上海）有限公司 filed Critical 微创优通医疗科技(嘉兴)有限公司
Priority to CA3197798A priority Critical patent/CA3197798A1/en
Priority to EP21888422.9A priority patent/EP4223235A4/en
Priority to KR1020237018237A priority patent/KR20230098297A/ko
Priority to JP2023527459A priority patent/JP2023547693A/ja
Priority to US18/252,125 priority patent/US20230404584A1/en
Publication of WO2022095725A1 publication Critical patent/WO2022095725A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/08—Wound clamps or clips, i.e. not or only partly penetrating the tissue ; Devices for bringing together the edges of a wound
    • A61B17/083—Clips, e.g. resilient
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B17/122—Clamps or clips, e.g. for the umbilical cord
    • A61B17/1227—Spring clips
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/10—Surgical instruments, devices or methods, e.g. tourniquets for applying or removing wound clamps, e.g. containing only one clamp or staple; Wound clamp magazines
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B17/128—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for applying or removing clamps or clips
    • A61B17/1285—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for applying or removing clamps or clips for minimally invasive surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B2017/12004—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for haemostasis, for prevention of bleeding

Definitions

  • the invention relates to the technical field of medical devices, in particular to a hemostatic clip.
  • ESD endoscopic submucosal dissection
  • ERCP endoscopic retrograde cholangiopancreatography
  • NOTES natural orifice endoscopic surgery
  • Hemostatic clips are instruments used to close defects or perforations in luminal tissue.
  • the collet of the hemostatic clip in the prior art can realize the functions of opening, closing and rotating. After being transported to the target position, the collet is driven to move by the traction mechanism, so as to realize the functions of opening, closing and rotating, and to carry out the operation on the tissue at the target position. After clamping, the collet is disengaged from the traction mechanism and remains in the body until the tissue at the target site grows completely so that the defect or perforation at the site is closed and then detached and excreted by itself through the digestive tract.
  • the clip head of the hemostatic clip in the prior art can be connected with the traction mechanism through a hook, and the connection between the two can be released through the breaking of the hook.
  • the collet can be connected with the traction mechanism through the cooperation of the ball head and the connecting yoke, and the connection can be released by the deformation of the connecting yoke, but the processing technology of the connecting yoke is complicated.
  • the purpose of the present invention is to provide a hemostatic clip, which has a simple and reliable structure and does not have the risk of remaining broken objects during use.
  • a hemostatic clip comprising:
  • the distal end of the traction mechanism is provided with an inner hole;
  • the clamping mechanism includes a tightening tube and a collet assembly; the tightening tube is provided with a first locking part; the collet assembly is partially arranged inside the tightening tube, and includes an engaging part and a collet body; the proximal end of the engaging portion is inserted into the inner hole, and has an interference fit with the inner hole; the proximal end of the collet body is connected with the distal end of the engaging portion, and the the distal end extends from the distal end of the tightening tube; the collet assembly is further provided with a second locking portion;
  • the hemostatic clip is configured to allow the pulling mechanism to urge the collet assembly along the length of the tightening tube under the action of an external force when the second locking portion and the first locking portion are disengaged from each other. Reciprocating movement in the axial direction to switch the chuck body between the open state and the closed state;
  • the hemostatic clip is further configured to prevent the collet assembly from tightening along the collet when the collet body is in the closed state and the second locking portion is connected to the first locking portion Axial movement of the tube, and when the pulling mechanism is subjected to a pulling force greater than a first predetermined value, the proximal end of the engaging portion is dislodged from the inner bore.
  • the hemostatic clip further includes a nipple assembly, the distal end of the nipple assembly is releasably connected to the proximal end of the tightening tube, communicates with the tightening tube, and is configured to be able to relative rotation with the tightening tube; the traction mechanism is partially arranged inside the nipple assembly, and can move along the axial direction of the nipple assembly;
  • the hemostatic clip is configured such that the pulling mechanism drives the collet assembly to rotate around the axis of the pulling mechanism under the action of an external force, while the tightening tube rotates.
  • the socket assembly is provided with a first limiting portion
  • the traction mechanism is provided with a second limiting portion; the second limiting portion and the first limiting portion cooperate with each other to The second locking portion is prevented from being connected with the first locking portion.
  • the nipple assembly includes a sleeve, the distal end of the sleeve is inserted into the inside of the tightening tube from the proximal end of the tightening tube, and the distal end face of the sleeve constitutes the first a limit part;
  • the distal end of the traction mechanism is provided with a first bending wing that is bent to the outside of the traction mechanism, and the first bending wing is configured to have elasticity and constitute the second limiting portion;
  • the hemostatic clip is configured to prevent movement of the collet assembly toward the proximal end of the tightening tube when the first flexure wing abuts the distal end face of the cannula, and the second The locking portion is located on the distal side of the first locking portion; when the pulling mechanism receives a pulling force greater than a second predetermined value, the first bending wing deforms and allows the pulling mechanism to drive the collet The assembly is moved toward the proximal end of the tightening tube until the second locking portion is connected with the first locking portion; the second predetermined value is less than the first predetermined value.
  • the clamping mechanism further includes a third limiting portion, disposed on the tightening tube and located at the distal end side of the joint portion, for constraining the collet assembly toward the tightening The maximum distance the distal end of the tube can travel to prevent the collet assembly from dislodging from the distal end of the constricted tube.
  • the first locking portion includes a locking hole disposed on the side wall of the tightening tube;
  • the second locking portion includes a locking hole disposed on the collet body close to the tightening tube The block on the surface of the inner wall side;
  • the third limiting portion is also used to limit the relative position of the collet assembly and the tightening tube in the circumferential direction, so that the locking block can be locked into the locking hole.
  • the third limiting portion extends along the radial direction of the tightening pipe, and forms two channels with the pipe wall of the tightening pipe;
  • the collet body includes two oppositely arranged clamping arms, and the distal ends of the two clamping arms respectively pass through the two passages and extend from the distal end of the tightening tube.
  • the third limiting portion includes a pin; or, the third limiting portion includes two first blocking walls disposed at the distal end of the tightening tube, two of the first blocking walls Symmetrical arrangement.
  • the socket assembly includes a sleeve and an elastic connector;
  • the sleeve includes a distal segment and a proximal segment, and the outer diameter of the distal segment is smaller than the outer diameter of the proximal segment.
  • the outer wall of the sleeve is formed with a stepped surface;
  • the distal segment is provided with a first through hole;
  • the elastic connecting piece includes a base part and a rod part, and the base part is arranged inside the sleeve , and the base is provided with a second through hole for the traction mechanism to penetrate;
  • the rod is arranged on the side of the base close to the distal end of the sleeve, along the axial direction of the sleeve extending, the distal end of the rod portion forms a second bending wing;
  • the second bending wing passes through the first through hole and extends to the outside of the sleeve to form a receiving groove with the stepped surface ;
  • the proximal end of the tightening tube is formed with a fourth limiting portion protruding inward, the proximal end of the tightening tube is sleeved on the distal segment of the sleeve, and the fourth limiting portion arranged at the receiving groove.
  • the pulling mechanism includes a core wire and a connecting tube, the connecting tube is disposed at the distal end of the core wire and has the inner hole; the core wire passes through the second through hole, so the connecting pipe is located at the distal end side of the base, and the outer diameter of the connecting pipe is larger than the diameter of the second through hole;
  • the hemostatic clip is configured such that when the proximal end of the engaging portion is disengaged from the inner bore and the proximal end of the connecting tube abuts the base portion, the traction mechanism is subjected to greater than a third predetermined value to deform the second bending wing and release the connection between the nipple assembly and the tightening tube.
  • the hemostatic clip further includes a handle assembly
  • the handle assembly includes a holding part, a sliding part and a rotating part
  • the holding part is provided with a sliding groove extending in the axial direction
  • the sliding part is provided on the the sliding groove and can slide along the sliding groove
  • the rotating part is rotatably arranged on the distal end of the grip part
  • the proximal end of the traction mechanism is connected from the proximal end of the socket assembly passing through and further extending into the inside of the handle assembly to connect with the sliding part and the rotating part of the handle assembly;
  • the hemostatic clip is configured such that when the sliding portion slides along the chute, the sliding portion drives the traction mechanism to move in the axial direction of the nipple assembly, so as to drive the collet assembly along the The axial movement of the tightening tube; when the rotating part rotates relative to the holding part, the rotating part drives the traction mechanism to rotate, so as to drive the collet assembly and the tightening tube to rotate.
  • the pulling mechanism includes a core wire, a connecting tube, a first connecting block and a second connecting block; wherein, the connecting tube is disposed at the distal end of the core wire and has the inner hole; the Both the first connection block and the second connection block are arranged at the proximal end of the core wire, and the second connection block is located at the proximal end side of the first connection block; the first connection block and the The rotating part is connected and configured to be able to rotate synchronously with the rotating part and to be able to move relative to the rotating part in the axial direction; the second connecting block is connected to the sliding part and configured to be axially movable is relatively stationary with the sliding portion, and can rotate relative to the sliding portion in the circumferential direction; and/or,
  • the socket assembly further comprises a spring tube, the distal end of the spring tube is connected with the proximal end segment of the sleeve, and the proximal end of the spring tube is provided with a positioning tube; the positioning tube is connected to the handle assembly
  • the rotating part is connected to the rotating part, and is configured to remain relatively stationary with the rotating part in the axial direction, and can rotate relative to the rotating part in the circumferential direction.
  • the hemostatic clip of the present invention has the following advantages:
  • the aforementioned hemostatic clip includes a traction mechanism and a clamping mechanism; wherein, the distal end of the traction mechanism is provided with an inner hole; the clamping mechanism includes a tightening tube and a collet assembly; the tightening tube is provided with a first a locking part; the collet assembly is partially disposed inside the tightening tube, and includes an engaging part and a collet body; the proximal end of the engaging part is inserted into the inner hole and interferes with the inner hole
  • the collet body is connected with the distal end of the joint portion, and the distal end of the collet body protrudes from the distal end of the tightening tube; the collet assembly is also provided with a second lock tight part.
  • the second locking portion and the first locking portion are separated from each other, and the operator can drive the collet assembly along the axial direction of the tightening tube by applying an external force to the pulling mechanism.
  • the operator applies a pulling force greater than a first predetermined value to the pulling mechanism, so that the proximal end of the engaging portion is disengaged from the inner hole, and the connection between the collet assembly and the pulling mechanism is released.
  • the collet assembly is connected by interference fit between the joint portion and the inner hole of the traction mechanism, and the structure is simple. When disconnecting the connection, it is only necessary to apply an appropriate pulling force, and the structural parts will not be broken, so there is no problem that the broken parts remain in the body and enter the wound, which is safe and reliable.
  • FIG. 1 is a schematic structural diagram of a hemostatic clip provided by the present invention according to an embodiment, and the clip assembly in the illustration is in an open state;
  • FIG. 2 is a schematic structural diagram of a hemostatic clip according to an embodiment of the present invention, and the clip assembly in the illustration is in a closed state;
  • FIG. 3 is a schematic diagram of a partial structure of a hemostatic clip provided by the present invention according to an embodiment
  • FIG. 4 is a partial cross-sectional view of a hemostatic clip provided by the present invention according to an embodiment
  • FIG. 5 is a partial cross-sectional view of a hemostatic clip provided by the present invention according to an embodiment, in which the clip assembly is in a closed state, and the first locking portion is not connected to the second locking portion;
  • FIG. 6 is a partial cross-sectional view of a hemostatic clip according to an embodiment of the present invention, in which the clip assembly is in a closed state, and the first locking portion is connected with the second locking portion, and the proximal end of the engaging portion is pulled from the traction mechanism out of the inner hole;
  • FIG. 7 is a partial schematic view of a hemostatic clip provided by the present invention according to an embodiment, in which the first locking portion is connected with the second locking portion;
  • FIG. 8 is a schematic structural diagram of a connecting pipe of a hemostatic clip provided by the present invention according to an embodiment
  • Fig. 9 is the partial structure schematic diagram of the hemostatic clip provided by the present invention according to one embodiment, mainly shows the proximal end structure of the traction mechanism in the illustration;
  • FIG. 10 is a cross-sectional view of a tightening tube of a hemostatic clip provided by the present invention according to an embodiment
  • FIG. 11 is a schematic diagram of the fitting relationship between the tightening tube of the hemostatic clip and the third limiting portion provided by the present invention according to an embodiment, in the figure (a) is a schematic diagram when the second blocking wall is not bent, in the figure (b) is a schematic diagram of the bending of the second blocking wall to form the third limiting portion;
  • FIG. 12 is a schematic structural diagram of a joint portion of a hemostatic clip provided by the present invention according to an embodiment
  • Figure 13 is a partial cross-sectional view of a hemostatic clip provided by the present invention according to an embodiment, and the figure mainly shows the connection relationship between the nipple assembly and the tightening tube;
  • FIG. 14 is a schematic structural diagram of an elastic connector of a hemostatic clip according to an embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of a handle assembly of a hemostatic clip provided according to an embodiment of the present invention.
  • FIG. 16 is an exploded schematic view of the handle assembly of the hemostatic clip according to an embodiment of the present invention.
  • each embodiment of the following description has one or more technical features, but this does not mean that the person using the present invention must implement all the technical features in any embodiment at the same time, or can only implement different embodiments separately.
  • One or all of the technical features of the .
  • those skilled in the art can selectively implement some or all of the technical features in any embodiment according to the disclosure of the present invention and depending on design specifications or implementation requirements, Or selectively implement a combination of some or all of the technical features in the multiple embodiments, thereby increasing the flexibility of the implementation of the present invention.
  • the singular forms “a,” “an,” and “the” include plural referents, and the plural forms “a plurality” include two or more referents unless the content clearly dictates otherwise.
  • the term “or” is generally employed in its sense including “and/or” unless the content clearly dictates otherwise, and the terms “installed”, “connected”, “connected” shall be To be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
  • proximal distal
  • distal is the relative orientation, relative position, orientation of elements or actions relative to each other from the perspective of the physician using the medical device, although “proximal”, “distal” “ is not limiting, but “proximal” generally refers to the end of the medical device that is closest to the physician during normal operation, and “distal” generally refers to the end that first enters the patient.
  • an embodiment of the present invention provides a hemostatic clip, and the hemostatic clip includes a traction mechanism 1000 and a clamping mechanism 2000 .
  • the distal end of the traction mechanism 1000 is provided with an inner hole 1001 .
  • the clamping mechanism 2000 includes a tightening tube 2100 and a collet assembly 2200 .
  • the tightening tube 2100 is provided with a first locking portion.
  • the collet assembly 2200 is disposed partially inside the take-up tube 2100 and includes an engagement portion 2210 and a collet body. The proximal end of the engaging portion 2210 is inserted into the inner hole 1001 and has an interference fit with the inner hole 1001 .
  • the collet body is connected to the distal end of the engaging portion 2210 , and the distal end of the collet body protrudes outside the tightening tube 2100 from the distal end of the tightening tube 2100 .
  • the collet assembly 2200 is also provided with a second locking portion.
  • the hemostatic clip is configured to allow the pulling mechanism to drive the collet assembly 2200 along the tightening under the action of the external force when the second locking portion and the first locking portion are disengaged from each other. Axial movement of the tube 2100 to switch the collet body between an open state and a closed state. In this way, the attitude of the chuck body can be adjusted to clamp the target.
  • the hemostatic clip is also configured to prevent the collet assembly 2200 from moving along the retraction when the collet body is in the closed state and the second locking portion and the first locking portion are connected. Axial movement of the tight tube 2100. In this way, when the chuck body clamps the target, the chuck body can be locked in the closed state through the connection between the second locking portion and the first locking portion, to maintain grip on the target. At this time, the operator applies a pulling force greater than a first predetermined value to the pulling mechanism 1000, so that the proximal end of the engaging portion 2210 can be disengaged from the inner hole 1001, and the collet assembly 2200 can be released from the The connection of the traction mechanism 1000 is described.
  • the first predetermined value is determined according to the interference fit force between the engaging portion 2210 and the inner hole 1001, and when the tensile force is greater than the first predetermined value, the tensile force can overcome the interference Win-fit can be done.
  • the connection between the clip assembly 2200 and the traction mechanism 1000 is simple and reliable, and easy to use. There will be no problem of breakage entering the wound and causing inflammation, which improves the safety of use.
  • the hemostatic clip further includes a sleeve assembly 3000, the distal end of the sleeve assembly 3000 is releasably connected to the proximal end of the tightening tube 2100, and is connected with the tightening sleeve assembly 3000.
  • Tube 2100 communicates.
  • the traction mechanism 1000 is partially disposed inside the nipple assembly 3000 and can move along the axial direction of the nipple assembly 3000 .
  • the "releasably connected" means that the socket assembly 3000 and the tightening tube 2100 can be disconnected under predetermined conditions.
  • the sleeve assembly 3000 is provided with a first limiting portion, and the traction mechanism 1000 is provided with a second limiting portion.
  • the second limiting portion cooperates with the first limiting portion to prevent the
  • the second locking portion is connected to the first locking portion.
  • the collet assembly can reciprocate along the axial direction of the tightening tube 2100 to adjust the posture of the collet assembly.
  • the clamping mechanism further includes a third limiting portion, the third limiting portion is disposed on the tightening tube 2100 and located on the distal side of the engaging portion 2210 for restraining the The maximum distance that the collet assembly 2200 moves toward the distal end of the tightening tube 2100 to prevent the collet assembly 2200 from disengaging from the distal end of the tightening tube 2100 .
  • the third limiting portion is also configured to limit the relative position of the collet assembly 2200 and the tightening tube 2100 in the circumferential direction, so that the second locking portion is circumferentially connected to the The first locking parts are aligned so that the two can be smoothly connected.
  • the tightening tube 2100 is also configured to be rotatable relative to the socket assembly 3000, so that when the traction mechanism 1000 rotates under the action of an external force to drive the collet assembly 2200 to rotate, The tightening tube 2100 does not interfere with the rotational movement of the collet assembly 2200 .
  • the pulling mechanism 1000 drives the collet assembly 2200 to rotate around the axis of the pulling mechanism 1000 , it can also drive the tightening tube 2100 to rotate.
  • the hemostatic clip also includes a handle assembly 4000 for connecting with the proximal end of the pulling mechanism 1000 .
  • the operator can apply force to the traction mechanism 1000 by operating the handle assembly 4000, thereby driving the clamping assembly 2000 to perform various actions.
  • the pulling mechanism 1000 includes a core wire 1100 and a connecting tube 1200 .
  • the connecting tube 1200 is disposed on the distal end of the core wire 1100 and has the inner hole 1001 , and the outer diameter of the connecting tube 1200 is larger than the outer diameter of the core wire 1100 .
  • the distal end of the traction mechanism 1000 specifically, the distal end of the connecting pipe 1200 is provided with a plurality of first bending wings 1210 bent to the outside of the connecting pipe 1200.
  • the first bending wings 1210 are arranged at intervals along the circumference of the connecting pipe 1200, preferably evenly arranged.
  • the bending angle of each of the first bending wings 1210 may be 90°, and the first bending wings 1210 are also configured to have elasticity.
  • the traction mechanism 1000 further includes a first connecting block 1300 and a second connecting block 1400 .
  • the first connection block 1300 and the second connection block 1400 are both disposed at the proximal end of the core wire 1100 , and the first connection block 1300 is located at the proximal end side of the second connection block 1400 .
  • the first connecting block 1300 has a non-rotating shape, that is, the cross-section of the first connecting block is non-circular, such as triangle, quadrangle, and hexagon.
  • the cross section of the second connection block 1400 may be circular.
  • the first connection block 1300 and the second connection block 1400 are both connected to the handle assembly 4000, and the specific connection relationship will be described later.
  • the core wire 1100 includes a core wire body and a core wire sleeve covering the outer surface of the core wire body.
  • the purpose of disposing the core wire sleeve is to reduce the amount of movement of the pulling mechanism 1000 along the nipple. The frictional force during the axial movement of the assembly 3000 reduces the probability of the core wire 1100 being bent.
  • the traction mechanism 1000 further includes a reinforcing sleeve 1500, which is sleeved on the part of the core wire 1100 located between the first connecting block 1300 and the second connecting block 1400, and the shaft of the reinforcing sleeve 1500 is The two ends are respectively connected with the first connection block 1300 and the second connection block 1400 .
  • the reinforcing sleeve 1500 is used to enhance the strength of the traction mechanism 1000 to avoid bending.
  • the tightening tube 2100 can be a cylindrical structure and has a first inner cavity that penetrates axially.
  • the first locking portion includes a locking hole 2101 disposed on the proximal side wall of the tightening tube 2100 .
  • the proximal end of the tightening tube 2100 is further provided with a fourth limiting portion 2102 protruding radially toward the inside of the tightening tube 2100 (as shown in FIG. 6 ).
  • the tightening tube 2100 has a uniform inner diameter along the entire axial length, and the fourth limiting portion may be a second stopper disposed at the proximal end of the tightening tube 2100 wall (not shown).
  • the fourth limiting portion may be a second stopper disposed at the proximal end of the tightening tube 2100 wall (not shown).
  • an annular groove 2103 is formed on the inner wall of the proximal end of the tightening tube 2100 , and the tightening tube 2100 is located at the proximal end side of the annular groove 2103 .
  • the wall constitutes the fourth limiting portion 2102 .
  • the third limiting portion is disposed at the distal end of the tightening tube 2100 and extends along the radial direction of the tightening tube 2100 , and the third limiting portion is connected to the The tube walls of the tightening tube 2100 together form two channels 2104 (as shown in FIG. 11(b)).
  • the third limiting portion includes a pin shaft 2300 , and both axial ends of the pin shaft 2300 are respectively connected with the tube wall of the tightening tube 2100 , so that Two mutually isolated channels 2104 are formed between the pin shaft 2300 and the pipe wall.
  • the third limiting portion includes two first blocking walls 2105 disposed at the distal end of the tightening tube 2100 .
  • the walls 2105 are preferably arranged symmetrically and abut against each other.
  • a part of the material can be cut on a complete cylindrical pipe to form the two first baffle walls 2105.
  • the still cylindrical part of the pipe can be used as the tightening pipe 2100, and the The first blocking wall 2105 extends along the axial direction of the pipe, and then a force is applied to the first blocking wall 2105 to bend the tightening tube 2100 radially inward.
  • FIG. 12 shows a schematic structural diagram of the joint portion 2210 .
  • the engaging portion 2210 includes a first connecting shaft 2211, a third connecting block 2212 and a second connecting shaft 2213.
  • the first connecting shaft 2211 and the second connecting shaft 2213 are respectively connected to the first connecting shaft 2211 and the second connecting shaft 2213.
  • Three connecting blocks 2212 are connected, and the first connecting shaft 2211 and the second connecting shaft 2213 are perpendicular to each other.
  • the two axial ends of the first connecting shaft 2211 respectively protrude from the outside of the third connecting block 2212 and are used for connecting with the collet assembly (as shown in FIG. 4 to FIG. 6 ).
  • the second connecting The distal end of the shaft 2213 is connected to the third connecting block 2212, and the proximal end of the second connecting shaft 2213 is used to be inserted into the inner hole 1001 of the traction mechanism 1000, and has an interference fit with the inner hole 1001 (as shown in Figure 4 and Figure 5).
  • the collet body includes two clamping arms 2221 , and the proximal ends of the two clamping arms 2221 are respectively connected with the two axial ends of the first connecting shaft 2211 .
  • the clip arm 2221 is configured to have elasticity, and a locking block 2222 is provided on the outer surface of the proximal end of the clip arm 2221 to serve as the second locking portion.
  • the “outer surface” refers to the surfaces of the two clip arms 2221 that face away from each other, that is, when the clip arms 2221 are assembled to the tightening tube 2100 , the clip arms 2221 face the inner wall of the tightening tube 2100 The surface is the outer surface.
  • the distal ends of the two clamping arms 2221 extend out of the two channels 2104 at the distal end of the tightening tube 2100 respectively. Tighten tube 2100.
  • the pulling mechanism 1000 can be made to drive the collet assembly 2200 in a direction away from the proximal end of the tightening tube 2100
  • the tube wall of the tightening tube 2100 does not exert pressure on the clamping arms 2221, the two clamping arms 2221 move away from each other, so that the clamping head body is switched to the open state.
  • the pulling mechanism 1000 can drive the collet assembly 2200 to move in a direction close to the proximal end of the tightening tube 2100 .
  • the tube wall of the tightening tube 2100 exerts pressure on the clamping arms 2221, and the two clamping arms 2221 approach each other so that the clamping body is switched to the closed state.
  • the collet assembly 2200 basically moves along the axial direction of the tightening tube 2100 without circumferential movement. Rotation (eg, the portion of the clamping arm 2221 at the distal end of the tightening tube 2100 cannot rotate circumferentially due to abutting against the tube wall and the third stop of the tightening tube 2100, respectively).
  • the chuck assembly 2200 moves until the blocking block 2222 reaches the locking hole 2101 , the blocking block 2222 falls into the locking hole 2101 (as shown in FIG. 7 ). At this point, the collet assembly 2200 is locked and cannot continue to move axially relative to the tightening tube 2100 . Subsequently, when the operator exerts a pulling force on the proximal end of the pulling mechanism 1000, and the pulling force is greater than the first predetermined value, the operator can overcome the proximal end of the engaging portion 2210 (specifically, the proximal end of the second connecting shaft 2213). The interference fit force between the end) and the inner hole 1001 makes the second connecting shaft 2213 come out of the inner hole 1001 (as shown in FIG.
  • the "push force” refers to the direction of the acting force from the proximal end of the traction mechanism 1000 to the distal end
  • the “pull force” refers to the direction of the acting force from the distal end of the traction mechanism 1000 to the proximal end .
  • the nipple assembly 3000 includes a sleeve 3100 and an elastic connector 3200 .
  • the distal end of the cannula 3100 is inserted into the first lumen of the tightening tube 2100 from the proximal end of the tightening tube 2100 .
  • the cannula 3100 includes an interconnected distal segment 3110 and a proximal segment 3120, the outer diameter of the distal segment 3110 being smaller than the outer diameter of the proximal segment 3120 such that all A stepped surface 3101 is formed on the outer wall of the sleeve 3100 , and the distal segment 3110 can be inserted into the first lumen from the proximal end of the tightening tube 2100 .
  • the distal segment 3110 also defines a first through hole 3111 .
  • the elastic connector 3200 includes a base 3210 and a rod 3220, wherein the base 3210 is disposed in the second inner cavity of the sleeve 3100, and the base 3210 is further provided with a second through hole 3211 , the diameter of the second through hole 3211 is greater than or equal to the outer diameter of the core wire 1100 , and smaller than the outer diameter of the connecting tube 1200 , so that the base portion 3210 is sleeved on the core wire 1100 .
  • the rod portion 3220 is disposed on the surface of the base portion 3210 near the distal end of the sleeve 3100 , and the rod portion 3220 extends in the axial direction of the sleeve 3100 .
  • the distal end of the rod portion 3220 is formed with a second bending wing 3221 bent outward, and the bending angle of the second bending wing 3221 is 90°-120° (the second bending wing 3221 and the included angle between the rods 3220).
  • the second bending wing 3221 (in the radial direction) passes through the first through hole 3111 and extends to the outside of the sleeve 3100 to form a receiving groove with the stepped surface 3101 of the sleeve 3100 .
  • the accommodating groove is used to cooperate with the fourth limiting portion of the tightening tube 2100 to realize the connection between the tightening tube 2100 and the nipple assembly 3000 (that is, when the tightening tube 2100 and the When the socket assembly 3000 is connected, the fourth limiting portion is limited between the second bending wing 3221 and the stepped surface 3101).
  • the second bending wing 3221 When the second bending wing 3221 is deformed under the action of an external force, so that the included angle between the second bending wing 3221 and the rod portion 3220 increases to a suitable angle, the second bending wing 3221 is The bending wing 3221 is separated from the first through hole 3111 from the inner side of the nipple assembly 3000 to release the connection between the tightening tube 2100 and the nipple assembly 3000 .
  • the traction mechanism 1000 moves toward the proximal end of the nipple assembly 3000 along the axial direction of the nipple assembly 3000 to drive the engaging portion 2210 and the clip
  • the connecting tube The first bending wing 1210 of the 1200 abuts on the distal end face of the socket assembly 3000 (specifically, the distal end face of the sleeve 3100), so as to prevent the traction mechanism 1000 from moving further toward the coupling.
  • the proximal end of the sleeve assembly 3000 moves, thereby preventing the locking block 2222 from being connected to the locking hole 2101 . That is to say, the distal end face of the socket assembly 3000 constitutes the first limiting portion, and the first bending wing 1210 constitutes the second limiting portion.
  • the pulling mechanism 1000 When the pulling mechanism 1000 is subjected to a pulling force greater than a second predetermined value, the first bending wing 1210 is deformed, so that the gap between the first bending wing 1210 and the outer surface of the connecting pipe 1200 is The formed included angle increases until the distal end of the socket assembly 3000 releases the restriction on the first bending wing 1210 , so that the traction mechanism 1000 can continue to move toward the socket assembly 3000 The proximal end of the movement is allowed to move the block 2222 to the locking hole 2101 of the tightening tube 2100 .
  • the second predetermined value is determined according to actual needs, but usually the second predetermined value is smaller than the first predetermined value.
  • the nipple assembly 3000 further includes a spring tube 3300 , the distal end of the spring tube 3300 is connected to the proximal end of the sleeve 3100 (ie, the proximal section
  • the proximal end of the spring tube 3300 is provided with a positioning tube 3310 , the cross section of the positioning tube 3310 can be circular, and is used for connecting with the handle assembly 4000 .
  • the handle assembly 4000 includes a holding part 4100 , a sliding part 4200 and a rotating part 4300 .
  • the grip portion 4100 is provided with a sliding groove 4110 extending in the axial direction.
  • the sliding portion 4200 is connected with the sliding groove 4110 and can slide along the sliding groove 4110 .
  • the rotating part 4300 is rotatably disposed at the distal end of the holding part 4100 . Please refer to FIG. 1 and FIG.
  • the proximal end of the pulling mechanism 1000 protrudes from the proximal end of the socket assembly 3000 (in this way, the first connecting block 1300 is located at the proximal end side of the positioning tube 3310 ), and is respectively connected with the sliding part 4200 and the rotating part 4300 of the handle assembly 4000 .
  • the hemostatic clip can be configured such that when the sliding part 4200 slides along the sliding groove 4110 , the sliding part 4200 drives the traction mechanism 1000 to move in the axial direction of the socket assembly 3000 .
  • the rotating part 4300 rotates relative to the holding part 4100 , the rotating part 4300 drives the traction mechanism 1000 to rotate.
  • a first limiting cavity 4301 and a second limiting cavity 4302 are provided inside the rotating portion 4300
  • a third limiting cavity 4201 is provided inside the sliding portion 4200 .
  • a limiter 6301 , the second limit cavity 4302 and the third limit cavity 4201 communicate with each other.
  • the shapes of the cross-sections of the first limiting cavity 4301 and the third limiting cavity 4201 include but are not limited to circles.
  • the cross-sections of the third limiting cavity 4201 may also be The cross section of the limiting cavity 4302 matches the cross section of the first connecting block 1300 .
  • the positioning tube 3310 of the spring tube 3300 is disposed in the first limiting cavity 4301, and is configured to remain relatively stationary with the rotating part 4300 in the axial direction, and the rotating part 4300 can be relative to the rotating part 4300.
  • the positioning tube 3310 rotates to prevent the socket assembly 3000 from generating torque when the traction mechanism 1000 rotates.
  • the first connecting block 1300 of the traction mechanism 1000 is disposed in the second limiting cavity 4302, and is configured to be able to move in the axial direction in the second limiting cavity 4302, and can also move with any The rotating part 4300 rotates synchronously.
  • the second connecting block 1400 of the traction mechanism 1000 is disposed in the third limiting cavity 4201 and is configured to remain relatively stationary with the sliding portion 4200 in the axial direction, and can be relative to the sliding portion 4200 in the circumferential direction.
  • the sliding part 4200 rotates to avoid torque generated when the traction mechanism 1000 rotates.
  • the holding part 4100 , the sliding part 4200 and the rotating part 4300 are all assembled structures, which is convenient for assembling the handle assembly 4000 , the traction mechanism 1000 and the sleeve assembly 3000 .
  • the operator manipulates the sliding portion 4200 of the handle assembly 4000 to slide within the sliding groove 4110 (distal end) to drive the traction mechanism 1000 along the
  • the axial movement of the nipple assembly 3000 drives the collet assembly to move in the axial direction (distal end) of the tightening tube 2100 to switch the collet body to the open state, and manipulate the rotating part 4300 drives the traction mechanism 1000 to rotate, and then drives the collet assembly to rotate, so as to adjust the posture of the collet assembly until the tissue at the target position enters between the two clamp arms 2221 .
  • the operator controls the pulling force exerted on the sliding part 4200, so that the pulling force on the pulling mechanism 1000 is smaller than the second predetermined value, and the distal end face of the socket assembly 3000 can
  • the first bending wing 1210 is limited to prevent the block 2222 from being connected to the locking hole 2101 . In this way, the operator can repeatedly adjust the posture of the collet assembly.
  • the operator pulls the sliding part 4200 proximally, so that the pulling mechanism 1000 drives the collet assembly to move in a direction close to the proximal end of the tightening tube 2100 until the first bending The wings 1210 abut on the distal end surface (ie, the first limiting portion) of the socket assembly 3000 .
  • the operator increases the pulling force to be greater than the second predetermined value, so that the first bending wing 1210 is deformed.
  • the operator increases the pulling force to be greater than the first predetermined value to overcome the interference fit force between the engaging portion 2210 and the inner hole 1001, and release the engaging portion 2210 and the traction mechanism 1000 Connection.
  • the operator continues to pull the sliding portion 4200 proximally until the connecting tube 1200 abuts on the base portion 3210 of the elastic connecting member 3200 . Then the operator continues to apply a pulling force greater than a third predetermined value, and the connecting tube 1200 transmits the pulling force to the elastic connecting member 3200, so that the second bending wing 3221 is deformed and the second bending wing 3221 is deformed from the first connection.
  • the hole 3111 comes out, thereby releasing the connection between the socket assembly 3000 and the tightening tube 2100 .
  • the third predetermined value is determined as required.

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Abstract

本发明涉及一种止血夹，包括牵引机构，其远端设置有内孔；夹持机构，包括收紧管和部分地设置在收紧管内部并包括接合部和夹头本体的夹头组件。接合部的近端插入内孔并与内孔过盈配合。夹头本体的近端与接合部的远端连接且其远端从收紧管的远端伸出。收紧管和夹头组件分别上设有第一和第二锁紧部。第二锁紧部与第一锁紧部分离时，夹头本体能在打开状态与闭合状态间切换。夹头本体处于闭合状态，且第二锁紧部与第一锁紧部连接时，夹头组件被锁定，并当牵引机构受到大于第一预定值的拉力时，接合部的近端从内孔脱出。在解除接合部与牵引机构的连接时，不会有部件发生断裂，避免断裂物滞留体内引起发炎等问题，提高使用安全性。

Description

一种止血夹 技术领域
本发明涉及医疗器械技术领域，具体涉及一种止血夹。
背景技术
随着内窥镜微创伤技术的不断进步，内窥镜黏膜下剥离术(ESD)、内窥镜逆行性胆管胰管造影术(ERCP)、经自然腔道内窥镜外科手术(NOTES)等内窥镜下治疗手术广泛开展。术中对消化道组织的缺损或穿孔进行安全有效的闭合，是各种内窥镜微创伤手术中必须解决的关键问题。
止血夹是用于对管腔组织的缺损或穿孔进行闭合的器械。现有技术中的止血夹的夹头能够实现开合及旋转功能，其在被输送至目标位置后，通过牵引机构驱使夹头运动，以实现开闭及旋转功能，并对目标位置的组织进行夹持，之后所述夹头脱离牵引机构，并保留在体内，直至目标位置的组织生长完全以使该位置的缺损或穿孔闭合后脱落并经消化道自行排出体外。
现有技术中的止血夹的夹头可通过钩子与牵引机构连接，并通过钩子的断裂解除两者的连接。但是，断裂的钩子一旦落入伤口，将引起炎症等问题。或者，夹头可通过球头与连接轭配合实现夹头与牵引机构的连接，并通过连接轭的变形来解除连接，但连接轭的加工工艺复杂。
发明内容
本发明的目的在于提供一种止血夹，其结构简单可靠，在使用时不存在断裂物残留的风险。
为实现上述目的，本发明提供了一种止血夹，包括：
牵引机构，所述牵引机构的远端设置有内孔；以及，
夹持机构，包括收紧管和夹头组件；所述收紧管上设有第一锁紧部；所述夹头组件部分地设置在所述收紧管内部，并包括接合部和夹头本体；所述接合部的近端插入所述内孔，并与所述内孔过盈配合；所述夹头本体的近端与所述接合部的远端连接，且所述夹头本体的远端从所述收紧管的远端伸出； 所述夹头组件上还设有第二锁紧部；
所述止血夹被配置为当所述第二锁紧部与所述第一锁紧部相互分离时，允许所述牵引机构在外力的作用下驱使所述夹头组件沿所述收紧管的轴向做往复运动，以使所述夹头本体在打开状态与闭合状态之间切换；
所述止血夹还被配置为当所述夹头本体处于所述闭合状态，且所述第二锁紧部与所述第一锁紧部连接时，阻止所述夹头组件沿所述收紧管的轴向运动，并当所述牵引机构受到大于第一预定值的拉力时，所述接合部的近端从所述内孔脱出。
可选地，所述止血夹还包括接套组件，所述接套组件的远端可解脱地连接至所述收紧管的近端，并与所述收紧管连通，且被配置为能够与所述收紧管相对转动；所述牵引机构部分地设置在所述接套组件内部，并能够沿所述接套组件的轴向运动；
所述止血夹被配置为所述牵引机构在外力的作用下驱使所述夹头组件绕所述牵引机构的轴线旋转，同时所述收紧管自转。
可选地，所述接套组件上设有第一限位部，所述牵引机构上设有第二限位部；所述第二限位部与所述第一限位部相互配合，以阻止所述第二锁紧部与所述第一锁紧部连接。
可选地，所述接套组件包括套管，所述套管的远端从所述收紧管的近端插入所述收紧管的内部，所述套管的远端端面构成所述第一限位部；
所述牵引机构的远端设有向所述牵引机构的外部弯折的第一折弯翼，所述第一折弯翼被配置为具有弹性，并构成所述第二限位部；
所述止血夹被配置为当所述第一折弯翼抵靠在所述套管的远端端面时，阻止所述夹头组件朝向所述收紧管的近端运动，且所述第二锁紧部位于所述第一锁紧部的远端侧；当所述牵引机构受到大于第二预定值的拉力时，所述第一折弯翼变形并允许所述牵引机构驱使所述夹头组件朝向所述收紧管的近端运动，直至所述第二锁紧部与所述第一锁紧部连接；所述第二预定值小于所述第一预定值。
可选地，所述夹持机构还包括第三限位部，设置在所述收紧管上，并位 于所述接合部的远端侧，用于约束所述夹头组件朝向所述收紧管的远端运动的最大距离，以阻止所述夹头组件从所述收紧管的远端脱出。
可选地，所述第一锁紧部包括设置在所述收紧管的侧壁上的锁紧孔；所述第二锁紧部包括设置在所述夹头本体的靠近所述收紧管的内壁一侧的表面上的卡块；
所述第三限位部还用于在周向上限制所述夹头组件与所述收紧管的相对位置，以使所述卡块能够卡入所述锁紧孔。
可选地，所述第三限位部沿所述收紧管的径向延伸，并与所述收紧管的管壁之间形成两个通道；
所述夹头本体包括相对设置的两个夹臂，两个所述夹臂的远端分别穿过两个所述通道，并从所述收紧管的远端伸出。
可选地，所述第三限位部包括销轴；或，所述第三限位部包括设置在所述收紧管远端的两个第一挡壁，两个所述第一挡壁对称布置。
可选地，所述接套组件包括套管和弹性连接件；所述套管包括远端节段和近端节段，所述远端节段的外径小于所述近端节段的外径，以使所套管的外壁上形成台阶面；所述远端节段上设置有第一通孔；所述弹性连接件包括基部和杆部，所述基部设置在所述套管的内部，且所述基部上开设有供所述牵引机构贯穿的第二通孔；所述杆部设置在所述基部靠近所述套管远端的一侧上，并沿所述套管的轴向延伸，所述杆部的远端形成第二折弯翼；所述第二折弯翼穿过所述第一通孔并延伸至所述套管的外部，以与所述台阶面形成容纳槽；
所述收紧管的近端形成有向内凸出的第四限位部，所述收紧管的近端套装在所述套管的远端节段上，且所述第四限位部设置在所述容纳槽处。
可选地，所述牵引机构包括芯丝和连接管，所述连接管设置在所述芯丝的远端，并具有所述内孔；所述芯丝穿过所述第二通孔，所述连接管位于所述基部的远端侧，且所述连接管的外径大于所述第二通孔的孔径；
所述止血夹被配置为当所述接合部的近端从所述内孔中脱出，且所述连接管的近端抵靠在所述基部上时，所述牵引机构受到大于第三预定值的拉力， 以使所述第二折弯翼变形并解除所述接套组件与所述收紧管的连接。
可选地，所述止血夹还包括手柄组件，所述手柄组件包括握持部、滑动部和转动部；所述握持部上开设有沿轴向延伸的滑槽，所述滑动部设置在所述滑槽上，并能够沿所述滑槽滑动；所述转动部可转动地设置在所述握持部的远端上；所述牵引机构的近端从所述接套组件的近端穿出，并进一步延伸至所述手柄组件内部，以与所述手柄组件的所述滑动部及所述转动部连接；
所述止血夹被配置为当所述滑动部沿所述滑槽滑动时，所述滑动部带动所述牵引机构沿所述接套组件的轴向运动，以驱使所述夹头组件沿所述收紧管的轴向运动；当所述转动部相对于所述握持部旋转时，所述转动部带动所述牵引机构自转，以驱使所述夹头组件和所述收紧管旋转。
可选地，所述牵引机构包括芯丝、连接管、第一连接块和第二连接块；其中，所述连接管设置在所述芯丝的远端，并具有所述内孔；所述第一连接块和所述第二连接块均设置在所述芯丝的近端，且所述第二连接块位于所述第一连接块的近端侧；所述第一连接块与所述转动部连接，并被配置为能够随所述转动部同步旋转且能够在轴向上与所述转动部相对运动；所述第二连接块与所述滑动部连接，并被配置为在轴向上与所述滑动部保持相对静止，且能够在周向上与所述滑动部相对旋转；和/或，
所述接套组件还包括弹簧管，所述弹簧管的远端与所述套管的近端节段连接，所述弹簧管的近端设置有定位管；所述定位管与所述手柄组件的转动部连接，并被配置为在轴向上与所述转动部保持相对静止，且能够在周向上与所述转动部相对旋转。
与现有技术相比，本发明的止血夹具有如下优点：
前述的止血夹包括牵引机构和夹持机构；其中，所述牵引机构的远端设置有内孔；所述夹持机构包括收紧管和夹头组件；所述收紧管上设有第一锁紧部；所述夹头组件部分地设置在所述收紧管内部，并包括接合部和夹头本体；所述接合部的近端插入所述内孔，并与所述内孔过盈配合；所述夹头本体与所述接合部的远端连接，且所述夹头本体的远端从所述收紧管的远端伸出；所述夹头组件上还设有第二锁紧部。初始时，所述第二锁紧部与所述第 一锁紧部相互分离，施术者通过向所述牵引机构施加外力，可驱使所述夹头组件沿所述收紧管的轴向做往复运动，以使所述夹头本体在打开状态与闭合状态之间切换；当所述夹头本体夹持住目标位置的组织并已切换至所述闭合状态后，施术者向所述牵引机构施加拉力，以使所述第二锁紧部与所述第一锁紧部连接，此时所述夹头本体被锁定在所述闭合状态。接着，施术者向所述牵引机构施加一大于第一预定值的拉力，以使所述接合部的近端从所述内孔中脱出，解除所述夹头组件与所述牵引机构的连接。所述夹头组件通过接合部与所述牵引机构的所述内孔之间的过盈配合实现连接，结构简单。在解除连接时，只需要施加合适的拉力即可，不会出现结构部件的断裂，因而不存在断裂部件残留体内进入伤口的问题，安全可靠。
附图说明
附图用于更好地理解本发明，不构成对本发明的不当限定。其中：
图1是本发明根据一实施例所提供的止血夹的结构示意图，图示中的夹头组件处于打开状态；
图2是本发明根据一实施例所提供的止血夹的结构示意图，图示中的夹头组件处于闭合状态；
图3是本发明根据一实施例所提供的止血夹的局部结构示意图；
图4是本发明根据一实施例所提供的止血夹的局部剖视图；
图5是本发明根据一实施例所提供的止血夹的局部剖视图，图示中夹头组件处于闭合状态，且所述第一锁紧部未与第二锁紧部连接；
图6是本发明根据一实施例所提供的止血夹的局部剖视图，图示中夹头组件处于闭合状态，且第一锁紧部与第二锁紧部连接，接合部的近端从牵引机构的内孔中脱出；
图7是本发明根据一实施例所提供的止血夹的局部示意图，图示中第一锁紧部与第二锁紧部连接；
图8是本发明根据一实施例所提供的止血夹的连接管的结构示意图；
图9是本发明根据一实施例所提供的止血夹的局部结构示意图，图示中 主要示出了牵引机构的近端结构；
图10是本发明根据一实施例所提供的止血夹的收紧管的剖视图；
图11是本发明根据一实施例所提供的止血夹的收紧管及第三限位部的配合关系示意图，图示中(a)是第二挡壁未弯折时的示意图，图示中(b)是第二挡壁弯折构成第三限位部的示意图；
图12是本发明根据一实施例所提供的止血夹的接合部的结构示意图；
图13是本发明根据一实施例所提供的止血夹的局部剖视图，图示中主要显示接套组件与收紧管的连接关系；
图14是本发明根据一实施例所提供的止血夹的弹性连接件的结构示意图；
图15是本发明根据一实施例所提供的止血夹的手柄组件的结构示意图；
图16是本发明根据一实施例所提供的止血夹的手柄组件的爆炸示意图。
具体实施方式
以下通过特定的具体实例说明本发明的实施方式，本领域技术人员可由本说明书所揭露的内容轻易地了解本发明的其他优点与功效。本发明还可以通过另外不同的具体实施方式加以实施或应用，本说明书中的各项细节也可以基于不同观点与应用，在没有背离本发明的精神下进行各种修饰或改变。需要说明的是，本实施例中所提供的图示仅以示意方式说明本发明的基本构想，遂图式中仅显示与本发明中有关的组件而非按照实际实施时的组件数目、形状及尺寸绘制，其实际实施时各组件的型态、数量及比例可为一种随意的改变，且其组件布局型态也可能更为复杂。
另外，以下说明内容的各个实施例分别具有一个或多个技术特征，然此并不意味着使用本发明者必需同时实施任一实施例中的所有技术特征，或仅能分开实施不同实施例中的一部或全部技术特征。换句话说，在实施为可能的前提下，本领域技术人员可依据本发明的公开内容，并视设计规范或实作需求，选择性地实施任一实施例中的部分或全部的技术特征，或者选择性地实施多个实施例中的部分或全部的技术特征的组合，借此增加本发明实施时的弹性。
如在本说明书中所使用的，单数形式“一”、“一个”以及“该”包括复数对象，复数形式“多个”包括两个以上的对象，除非内容另外明确指出外。如在本说明书中所使用的，术语“或”通常是以包括“和/或”的含义而进行使用的，除非内容另外明确指出外，以及术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接。可以是机械连接，也可以是电连接。可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
为使本发明的目的、优点和特征更加清楚，以下结合附图对本发明作进一步详细说明。需说明的是，附图均采用非常简化的形式且均使用非精准的比例，仅用以方便、明晰地辅助说明本发明实施例的目的。附图中相同或相似的附图标记代表相同或相似的部件。
在本文中，术语“近端”、“远端”是从使用该医疗器械的医生角度来看相对于彼此的元件或动作的相对方位、相对位置、方向，尽管“近端”、“远端”并非是限制性的，但是“近端”通常指该医疗设备在正常操作过程中靠近医生的一端，而“远端”通常是指首先进入患者体内的一端。
请参考图1至图7，本发明实施例提供了一种止血夹，所述止血夹包括牵引机构1000和夹持机构2000。所述牵引机构1000的远端上设有内孔1001。所述夹持机构2000包括收紧管2100和夹头组件2200。所述收紧管2100上设有第一锁紧部。所述夹头组件2200部分地设置在所述收紧管2100内部，并包括接合部2210和夹头本体。所述接合部2210的近端插入所述内孔1001中，并与所述内孔1001过盈配合。所述夹头本体与所述接合部2210的远端连接，且所述夹头本体的远端从所述收紧管2100的远端伸出所述收紧管2100外部。所述夹头组件2200上还设有第二锁紧部。
所述止血夹被配置当所述第二锁紧部与所述第一锁紧部相互分离时，允许所述牵引机构在所述外力的作用下驱使所述夹头组件2200沿所述收紧管2100的轴向运动，以使所述夹头本体在打开状态和闭合状态之间切换。如此， 可使所述夹头本体调整姿态以夹持目标物。
所述止血夹还被配置为当所述夹头本体处于所述闭合状态，且所述第二锁紧部和所述第一锁紧部连接时，阻止所述夹头组件2200沿所述收紧管2100的轴向运动。这样一来，当所述夹头本体夹持所述目标物时，可通过所述第二锁紧部与所述第一锁紧部的连接将所述夹头本体锁定在所述闭合状态，以保持对所述目标物的夹持。此时，施术者向所述牵引机构1000施加一大于第一预定值的拉力，可使所述接合部2210的近端可从所述内孔1001脱出，解除所述夹头组件2200与所述牵引机构1000的连接。应理解，所述第一预定值根据所述接合部2210与所述内孔1001间的过盈配合力来确定，当所述拉力大于所述第一预定值时，该拉力能够克服所述过盈配合力即可。本发明实施例所提供的止血夹中，所述夹头组件2200与所述牵引机构1000的连接方式简单可靠，使用方便，在解除两者的连接时，不存在结构件断裂的问题，也就不会出现断裂物进入创口而引发炎症的问题，提高使用安全性。
请重点参考图4至图6，所述止血夹还包括接套组件3000，所述接套组件3000的远端可解脱地连接至所述收紧管2100的近端，并与所述收紧管2100连通。所述牵引机构1000部分地设置在所述接套组件3000内部，并能够沿所述接套组件3000的轴向运动。所述“可解脱地连接”是指所述接套组件3000与所述收紧管2100在预定条件下能够解除连接。
所述接套组件3000上设置有第一限位部，所述牵引机构1000上设有第二限位部，所述第二限位部与所述第一限位部相互配合，以阻止所述第二锁紧部和所述第一锁紧部连接。在所述第二锁紧部与所述第一锁紧部连接前，所述夹头组件可沿所述收紧管2100的轴向做往复运动，以调整所述夹头组件姿态。
可选地，所述夹持机构还包括第三限位部，所述第三限位部设置在所述收紧管2100上，并位于所述接合部2210的远端侧，用于约束所述夹头组件2200朝向所述收紧管2100的远端运动的最大距离，以阻止所述夹头组件2200从所述收紧管2100的远端脱出。不仅于此，所述第三限位部还被配置用于在周向上限制所述夹头组件2200与所述收紧管2100的相对位置，以使所述第 二锁紧部在周向上与所述第一锁紧部对齐，从而两者能够顺利地连接。本实施例中，所述收紧管2100还被配置为能够相对于所述接套组件3000旋转，使得在所述牵引机构1000在外力的作用下自转以驱使所述夹头组件2200旋转时，所述收紧管2100不会对所述夹头组件2200的旋转运动造成干涉。换句话说，所述牵引机构1000驱使所述夹头组件2200绕所述牵引机构1000的轴线旋转的同时，还能够驱使所述收紧管2100旋转。
另外，所述止血夹还包括手柄组件4000，用于与所述牵引机构1000的近端连接。施术者可通过操作手柄组件4000来对所述牵引机构1000施加作用力，进而驱使所述夹持组件2000执行各种动作。
接下去，本文将结合附图详细介绍所述止血夹的各个部件的结构及相互之间的装配关系。本领域技术人员应知晓，以下结构的各个部件仅是本发明实施例中所述止血夹的可用的结构，并不是必须的选择，因而不应对本发明构成限制。
请接着参考图4至图6，并结合图8，所述牵引机构1000包括芯丝1100和连接管1200。所述连接管1200设置在所述芯丝1100的远端端部上，并具有所述内孔1001，且所述连接管1200的外径大于所述芯丝1100的外径。所述牵引机构1000的远端，具体来说，是所述连接管1200的远端端部上设有向所述连接管1200的外部弯折的多个第一折弯翼1210，多个所述第一折弯翼1210沿所述连接管1200的周向间隔布置，优选为均匀布置。每个所述第一折弯翼1210的弯折角度可以为90°，所述第一折弯翼1210还被配置为具有弹性。
请再参考图9，所述牵引机构1000还包括第一连接块1300和第二连接块1400。所述第一连接块1300和所述第二连接块1400均设置在所述芯丝1100的近端，且所述第一连接块1300位于所述第二连接块1400的近端侧。所述第一连接块1300具有非回转的外形，即所述第一连接块的横截面为非圆形，例如可以是三角形、四边形和六边形等。所述第二连接块1400的横截面可为圆形。所述第一连接块1300及所述第二连接块1400均与所述手柄组件4000连接，具体的连接关系将在后文中介绍。优选地，所述芯丝1100包括芯丝本 体和包覆在所述芯丝本体之外表面的芯丝套，设置所述芯丝套的目的在于减小所述牵引机构1000沿所述接套组件3000的轴向运动时的摩擦力，降低所述芯丝1100发生弯折的概率。
另外，所述牵引机构1000还包括加强套1500，套装在所述芯丝1100位于所述第一连接块1300和所述第二连接块1400之间的部分上，且所述加强套1500的轴向两端分别与所述第一连接块1300和所述第二连接块1400连接。所述加强套1500用于增强牵引机构1000的强度，避免发生弯折。
请参考图3，所述收紧管2100可以是圆柱形结构，并具有轴向贯通的第一内腔。所述第一锁紧部包括设置在所述收紧管2100之近端侧壁上的锁紧孔2101。所述收紧管2100的近端上还设有沿径向向所述收紧管2100的内部凸出的第四限位部2102(如图6所示)。
在一些实施例中，所述收紧管2100在轴向的全部长度上具有均一的内径，所述第四限位部可以是设置在所述收紧管2100之近端端部的第二挡壁(图中未示出)。在另一些实施例中，如图10所示，所述收紧管2100的近端内壁上形成有环形凹槽2103，所述收紧管2100位于所述环形凹槽2103的近端侧的管壁构成所述第四限位部2102。
请参考图3至图7，所述第三限位部设置在所述收紧管2100的远端，并沿所述收紧管2100的径向延伸，且所述第三限位部与所述收紧管2100的管壁共同形成两个通道2104(如图11(b)所示)。在一些实施例中，如图3至图7所示，所述第三限位部包括销轴2300，所述销轴2300轴向两端分别与所述收紧管2100的管壁连接，使得所述销轴2300与所述管壁之间形成两个相互隔离的通道2104。在另一些实施例中，如图11所示，所述第三限位部包括设置在所述收紧管2100之远端端部的两个第一挡壁2105，两个所述第一挡壁2105优选对称设置，并可相互抵接。在加工时，可在一完整的圆柱形管材上切削一部分材料，以形成两个所述第一挡壁2105，此时管材上仍呈圆柱形的部分可作为所述收紧管2100，而所述第一挡壁2105沿所述管材的轴向延伸，然后向所述第一挡壁2105施加作用力，以使其沿所述收紧管2100径向向内弯折即可。
图12示出了所述接合部2210的结构示意图。如图12所示，所述接合部2210包括第一连接轴2211、第三连接块2212及第二连接轴2213,所述第一连接轴2211和所述第二连接轴2213分别与所述第三连接块2212连接，且所述第一连接轴2211与所述第二连接轴2213相互垂直。所述第一连接轴2211的轴向两端分别伸出所述第三连接块2212的外部，并用于与所述夹头组件连接(如图4至图6所示)，所述第二连接轴2213的远端与所述第三连接块2212连接，所述第二连接轴2213的近端用于插入所述牵引机构1000的所述内孔1001，并与所述内孔1001过盈配合(如图4、图5所示)。
如图4至图6所示，所述夹头本体包括两个夹臂2221，两个所述夹臂2221的近端分别与所述第一连接轴2211的轴向两端连接。所述夹臂2221被配置为具有弹性，且所述夹臂2221的近端的外表面上设有卡块2222，以作为所述第二锁紧部。所述“外表面”是指两个所述夹臂2221的相互背离的表面，即在将其组装至所述收紧管2100上时，所述夹臂2221朝向所述收紧管2100的内壁的表面为所述外表面。
将所述牵引机构1000和所述夹持机构2000组装在一起时，两个所述夹臂2221的远端分别从所述收紧管2100之远端的两个所述通道2104伸出所述收紧管2100。当施术者在所述牵引机构1000的近端向所述牵引机构1000施加推力时，可使所述牵引机构1000驱使所述夹头组件2200沿远离所述收紧管2100之近端的方向运动，直至所述收紧管2100的管壁不向所述夹臂2221施加压力时，两个所述夹臂2221相互远离，以使所述夹头本体切换至所述打开状态。当施术者在所述牵引机构1000的近端向所述牵引机构1000施加拉力时，所述牵引机构1000可驱使所述夹头组件2200沿靠近所述收紧管2100之近端的方向运动。此过程中，所述收紧管2100的管壁向所述夹臂2221施加压力，两个所述夹臂2221相互靠近以使所述夹头本体切换至所述闭合状态。可理解，在所述第三限位部(如销轴2300或者第一挡壁2105)的约束下，所述夹头组件2200基本沿所述收紧管2100的轴向运动而不会发生周向旋转(例如，夹臂2221位于收紧管2100的远端的部分由于分别抵靠收紧管2100的管壁和第三限位部而无法周向旋转)。
当所述夹头组件2200运动至所述卡块2222到达所述锁紧孔2101处时，所述卡块2222落入所述锁紧孔2101内(如图7所示)。至此，所述夹头组件2200被锁定，并不能够再继续相对于所述收紧管2100做轴向运动。随后，施术者在所述牵引机构1000的近端施加拉力，且拉力大于所述第一预定值时，能够克服所述接合部2210的近端(具体是所述第二连接轴2213的近端)与所述内孔1001之间的过盈配合力，使得所述第二连接轴2213从所述内孔1001中脱出(如图6所示)，以解除接合部2210与所述牵引机构1000的连接。可理解，所述“推力”是指作用力的方向由所述牵引机构1000的近端指向远端，所述“拉力”是指作用力的方向由所述牵引机构1000的远端指向近端。
接着，请返回参考图4至图6，并结合图13和图14，所述接套组件3000包括套管3100和弹性连接件3200。所述套管3100的远端从所述收紧管2100的近端插入所述收紧管2100的第一内腔中。具体而言，所述套管3100包括相互连接的远端节段3110和近端节段3120，所述远端节段3110的外径小于所述近端节段3120的外径，以使所述套管3100的外壁上形成台阶面3101，并且所述远端节段3110能够从所述收紧管2100的近端插入所述第一内腔。所述远端节段3110上还开设有第一通孔3111。所述弹性连接件3200包括基部3210和杆部3220，其中，所述基部3210设置在所述套管3100的所述第二内腔中，且所述基部3210上还设有第二通孔3211，所述第二通孔3211的孔径大于或等于所述芯丝1100的外径，并小于所述连接管1200的外径，以使所述基部3210套装在所述芯丝1100上。所述杆部3220设置在所述基部3210靠近所述套管3100的远端的表面上，且所述杆部3220沿所述套管3100的轴向延伸。所述杆部3220的远端形成有向外弯折的第二折弯翼3221，所述第二折弯翼3221的弯折角度为90°-120°(所述第二折弯翼3221与所述杆部3220之间的夹角角度)。所述第二折弯翼3221(在径向上)穿过所述第一通孔3111，并延伸至所述套管3100的外部，以与所述套管3100的所述台阶面3101形成容纳槽。该容纳槽用于与所述收紧管2100的所述第四限位部配合，实现所述收紧管2100与所述接套组件3000的连接(即当所述收紧管2100与所述接套组件3000连接时，所述第四限位部被限制在所述第二折弯翼3221与所述台 阶面3101之间)。当所述第二折弯翼3221在外力的作用下发生变形而使得所述第二折弯翼3221与所述杆部3220之间的夹角角度增大至合适的角度时，所述第二折弯翼3221从所述接套组件3000的内侧脱离所述第一通孔3111，以解除所述收紧管2100与所述接套组件3000之间的连接。
请重点参考图5，在所述牵引机构1000在拉力的作用下沿所述接套组件3000的轴向朝向所述接套组件3000的近端运动，以驱使所述接合部2210和所述夹头组件朝向所述收紧管2100的近端运动的过程中，在所述夹头组件的所述卡块2222到达所述收紧管2100的所述锁紧孔2101处之前，所述连接管1200的所述第一折弯翼1210抵靠在所述接套组件3000的远端端面(具体为所述套管3100的远端端面)上，以阻止所述牵引机构1000进一步向所述接套组件3000的近端运动，从而阻止所述卡块2222与所述锁紧孔2101连接。也就是说，所述接套组件3000的远端端面构成所述第一限位部，同时所述第一折弯翼1210构成所述第二限位部。当所述牵引机构1000受到一大于第二预定值的拉力时，所述第一折弯翼1210发生变形，以使所述第一折弯翼1210与所述连接管1200的外表面之间所形成的夹角角度增大，直至所述接套组件3000的远端端部解除对所述第一折弯翼1210的限位，以使所述牵引机构1000可继续向所述接套组件3000的近端运动，从而允许卡块2222运动至所述收紧管2100的所述锁紧孔2101处。所述第二预定值根据实际需要确定，但通常所述第二预定值小于所述第一预定值。
进一步地，请返回参考图13，并结合图9，所述接套组件3000还包括弹簧管3300，所述弹簧管3300的远端与所述套管3100的近端(即所述近端节段3120的近端)连接，所述弹簧管3300的近端设置有定位管3310，所述定位管3310的横截面可为圆形，并用于与所述手柄组件4000连接。
接着，请参考图15，所述手柄组件4000包括握持部4100、滑动部4200和转动部4300。其中，所述握持部4100上开设有沿轴向延伸的滑槽4110，所述滑动部4200与所述滑槽4110连接，并能够沿所述滑槽4110滑动。所述转动部4300可转动地设置在所述握持部4100的远端。请参考图1和图2，所述牵引机构1000的近端(即所述芯丝1100的近端)从所述接套组件3000的 近端穿出(如此一来，所述第一连接块1300位于所述定位管3310的近端侧)，并分别与所述手柄组件4000的所述滑动部4200和所述转动部4300连接。以使所述止血夹能够被配置为当所述滑动部4200沿所述滑槽4110滑动时，所述滑动部4200带动所述牵引机构1000沿所述接套组件3000的轴向运动。当所述转动部4300相对于所述握持部4100旋转时，所述转动部4300带动所述牵引机构1000自转。
请结合图10及图16，所述转动部4300的内部设有第一限位腔4301和第二限位腔4302，所述滑动部4200的内部设有第三限位腔4201，所述第一限位器6301、所述第二限位腔4302及所述第三限位腔4201相互连通。所述第一限位腔4301和所述第三限位腔4201的横截面的形状包括但不限于圆形，例如所述第三限位腔4201的横截面还可以是矩形,所述第二限位腔4302的横截面与所述第一连接块1300的横截面相匹配。所述弹簧管3300的所述定位管3310设置在所述第一限位腔4301中，并被配置为与所述转动部4300在轴向上保持相对静止，并且所转动部4300可相对于所述定位管3310转动，避免所述接套组件3000随所述牵引机构1000旋转而发生扭矩。所述牵引机构1000的所述第一连接块1300设置在所述第二限位腔4302中，并被配置为能够在所述第二限位腔4302中沿轴向运动，并还能够随所述转动部4300同步旋转。所述牵引机构1000的所述第二连接块1400设置在所述第三限位腔4201中，并被配置为在轴向上与所述滑动部4200保持相对静止，并能够在周向上相对于所述滑动部4200转动，避免所述牵引机构1000旋转时发生扭矩。
本实施例中，优选所述握持部4100、所述滑动部4200及所述转动部4300均为拼装式结构，方便组装所述手柄组件4000与所述牵引机构1000及所述接套组件3000。
下面介绍所述止血夹的使用方法。
将所述止血夹输送至体内的目标位置之后，施术者操控所述手柄组件4000的所述滑动部4200在所述滑槽4110内(向远端)滑动，以驱使所述牵引机构1000沿所述接套组件3000的轴向运动，进而驱动所述夹头组件沿所述收紧管2100的轴向(向远端)运动而使得夹头本体切换至打开状态，以及 操控所述转动部4300驱使所述牵引机构1000旋转，进而驱动所述夹头组件转动，以调整所述夹头组件的位姿，直至目标位置的组织进入两个夹臂2221之间。此过程中，施术者控制施加在所述滑动部4200上的拉力，使所述牵引机构1000受到的拉力小于所述第二预定值，所述接套组件3000的远端端面能够对所述第一折弯翼1210进行限位，阻止所述卡块2222与所述锁紧孔2101连接。如此，施术者可重复多次地调整所述夹头组件的位姿。
接着，施术者向近端拉动所述滑动部4200，以使所述牵引机构1000驱使所述夹头组件沿靠近所述收紧管2100之近端的方向运动，直至所述第一折弯翼1210抵靠在所述接套组件3000的远端端面(即，第一限位部)上。
接着，施术者增大拉力至大于所述第二预定值，使得所述第一折弯翼1210变形。
接着，施术者继续向近端拉动所述滑动部4200，直至所述卡块2222进入所述锁紧孔2101。
接着，施术者增大拉力至大于所述第一预定值，以克服所述接合部2210与所述内孔1001之间的过盈配合力，解除所述接合部2210与所述牵引机构1000的连接。
接着，施术者继续向近端拉动所述滑动部4200，直至所述连接管1200抵靠在所述弹性连接件3200的所述基部3210上。然后施术者继续施加拉力至大于第三预定值，所述连接管1200将所述拉力传递至所述弹性连接件3200上，以使所述第二折弯翼3221发生变形而从第一通孔3111中脱出，从而解除了所述接套组件3000与所述收紧管2100的连接。所述第三预定值根据需要确定。
最后，施术者继续向近端拉动所述滑动部4200，以将所述接套组件3000及所述牵引机构1000撤出体外。
虽然本发明披露如上，但并不局限于此。本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (12)

  1. 一种止血夹，其特征在于，包括：
    牵引机构，所述牵引机构的远端设置有内孔；以及，
    夹持机构，包括收紧管和夹头组件；所述收紧管上设有第一锁紧部；所述夹头组件部分地设置在所述收紧管内部，并包括接合部和夹头本体；所述接合部的近端插入所述内孔，并与所述内孔过盈配合；所述夹头本体的近端与所述接合部的远端连接，且所述夹头本体的远端从所述收紧管的远端伸出；所述夹头组件上还设有第二锁紧部；
    所述止血夹被配置为当所述第二锁紧部与所述第一锁紧部相分离时，允许所述牵引机构在外力的作用下驱使所述夹头组件沿所述收紧管的轴向做往复运动，以使所述夹头本体在打开状态与闭合状态之间切换；
    所述止血夹还被配置为当所述夹头本体处于所述闭合状态，且所述第二锁紧部与所述第一锁紧部连接时，阻止所述夹头组件沿所述收紧管的轴向运动，并当所述牵引机构受到大于第一预定值的拉力时，所述接合部的近端从所述内孔脱出。
  2. 根据权利要求1所述的止血夹，其特征在于，所述止血夹还包括接套组件，所述接套组件的远端可解脱地连接至所述收紧管的近端，并与所述收紧管连通，且被配置为能够与所述收紧管相对转动；所述牵引机构部分地设置在所述接套组件内部，并能够沿所述接套组件的轴向运动；
    所述止血夹被配置为所述牵引机构在外力的作用下驱使所述夹头组件绕所述牵引机构的轴线旋转，同时所述收紧管自转。
  3. 根据权利要求2所述的止血夹，其特征在于，所述接套组件上设有第一限位部，所述牵引机构上设有第二限位部；所述第二限位部与所述第一限位部相互配合，以阻止所述第二锁紧部与所述第一锁紧部连接。
  4. 根据权利要求3所述的止血夹，其特征在于，所述接套组件包括套管，所述套管的远端从所述收紧管的近端插入所述收紧管的内部，所述套管的远端端面构成所述第一限位部；
    所述牵引机构的远端设有向所述牵引机构的外部弯折的第一折弯翼，所 述第一折弯翼被配置为具有弹性，并构成所述第二限位部；
    所述止血夹被配置为当所述第一折弯翼抵靠在所述套管的远端端面时，阻止所述夹头组件朝向所述收紧管的近端运动，且所述第二锁紧部位于所述第一锁紧部的远端侧；当所述牵引机构受到大于第二预定值的拉力时，所述第一折弯翼变形并允许所述牵引机构驱使所述夹头组件朝向所述收紧管的近端运动，直至所述第二锁紧部与所述第一锁紧部连接；所述第二预定值小于所述第一预定值。
  5. 根据权利要求1-4中任一项所述的止血夹，其特征在于，所述夹持机构还包括第三限位部，设置在所述收紧管上，并位于所述接合部的远端侧，用于约束所述夹头组件朝向所述收紧管的远端运动的最大距离，以阻止所述夹头组件从所述收紧管的远端脱出。
  6. 根据权利要求5所述的止血夹，其特征在于，所述第一锁紧部包括设置在所述收紧管的侧壁上的锁紧孔；所述第二锁紧部包括设置在所述夹头本体的靠近所述收紧管的内壁一侧的表面上的卡块；
    所述第三限位部还用于在周向上限制所述夹头组件与所述收紧管的相对位置，以使所述卡块能够卡入所述锁紧孔。
  7. 根据权利要求6所述的止血夹，其特征在于，所述第三限位部沿所述收紧管的径向延伸，并与所述收紧管的管壁之间形成两个通道；
    所述夹头本体包括相对设置的两个夹臂，两个所述夹臂的远端分别穿过两个所述通道，并从所述收紧管的远端伸出。
  8. 根据权利要求7所述的止血夹，其特征在于，所述第三限位部包括销轴；或，所述第三限位部包括设置在所述收紧管远端的两个第一挡壁，两个所述第一挡壁对称布置。
  9. 根据权利要求2所述的止血夹，其特征在于，所述接套组件包括套管和弹性连接件；所述套管包括远端节段和近端节段，所述远端节段的外径小于所述近端节段的外径，以使所套管的外壁上形成台阶面；所述远端节段上设置有第一通孔；所述弹性连接件包括基部和杆部，所述基部设置在所述套管的内部，且所述基部上开设有供所述牵引机构贯穿的第二通孔；所述杆部 设置在所述基部靠近所述套管远端的一侧上，并沿所述套管的轴向延伸，所述杆部的远端形成第二折弯翼；所述第二折弯翼穿过所述第一通孔并延伸至所述套管的外部，以与所述台阶面形成容纳槽；
    所述收紧管的近端形成有向内凸出的第四限位部，所述收紧管的近端套装在所述套管的远端节段上，且所述第四限位部设置在所述容纳槽处。
  10. 根据权利要求9所述的止血夹，其特征在于，所述牵引机构包括芯丝和连接管，所述连接管设置在所述芯丝的远端，并具有所述内孔；所述芯丝穿过所述第二通孔，所述连接管位于所述基部的远端侧，且所述连接管的外径大于所述第二通孔的孔径；
    所述止血夹被配置为当所述接合部的近端从所述内孔中脱出，且所述连接管的近端抵靠在所述基部上时，所述牵引机构受到大于第三预定值的拉力，以使所述第二折弯翼变形并解除所述接套组件与所述收紧管的连接。
  11. 根据权利要求9所述的止血夹，其特征在于，所述止血夹还包括手柄组件，所述手柄组件包括握持部、滑动部和转动部；所述握持部上开设有沿轴向延伸的滑槽，所述滑动部设置在所述滑槽上，并能够沿所述滑槽滑动；所述转动部可转动地设置在所述握持部的远端上；所述牵引机构的近端从所述接套组件的近端穿出，并进一步延伸至所述手柄组件内部，以与所述手柄组件的所述滑动部及所述转动部连接；
    所述止血夹被配置为当所述滑动部沿所述滑槽滑动时，所述滑动部带动所述牵引机构沿所述接套组件的轴向运动，以驱使所述夹头组件沿所述收紧管的轴向运动；当所述转动部相对于所述握持部旋转时，所述转动部带动所述牵引机构自转，以驱使所述夹头组件和所述收紧管旋转。
  12. 根据权利要求11所述的止血夹，其特征在于，所述牵引机构包括芯丝、连接管、第一连接块和第二连接块；其中，所述连接管设置在所述芯丝的远端，并具有所述内孔；所述第一连接块和所述第二连接块均设置在所述芯丝的近端，且所述第二连接块位于所述第一连接块的近端侧；所述第一连接块与所述转动部连接，并被配置为能够随所述转动部同步旋转且能够在轴向上与所述转动部相对运动；所述第二连接块与所述滑动部连接，并被配置 为在轴向上与所述滑动部保持相对静止，且能够在周向上与所述滑动部相对旋转；和/或，
    所述接套组件还包括弹簧管，所述弹簧管的远端与所述套管的近端节段连接，所述弹簧管的近端设置有定位管；所述定位管与所述手柄组件的转动部连接，并被配置为在轴向上与所述转动部保持相对静止，且能够在周向上与所述转动部相对旋转。
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