CN116421243A

CN116421243A - Medical cutter

Info

Publication number: CN116421243A
Application number: CN202310711530.6A
Authority: CN
Inventors: 吴波; 胡建成
Original assignee: Hangzhou Rejoin Mastin Medical Device Co ltd
Current assignee: Hangzhou Rejoin Mastin Medical Device Co ltd
Priority date: 2023-06-15
Filing date: 2023-06-15
Publication date: 2023-07-14
Anticipated expiration: 2043-06-15
Also published as: CN116421243B

Abstract

The invention relates to a medical cutter comprising: the cutting assembly is positioned at the distal end of the medical cutter and comprises a supporting piece and a shearing piece, the shearing piece can rotate relative to the supporting piece, and the shearing piece is used for cutting a suture; a handle assembly located at the proximal end of the medical cutter for controlling rotation of the cutting member; the connecting component is used for connecting the cutting component and the handle component; and the extension piece is fixedly connected to one end of the cutting assembly, which is relatively far away from the connecting assembly, and is used for reserving a suture with a preset length when the cutting piece cuts the suture. When the medical cutter cuts the suture, the length of the thread head reserved in the patient is longer because the knotting part of the suture is cut by the extension piece; can avoid the phenomenon of loosening after operation, reduce the degree of bad influence of creep of the suture on the patient, reduce the damage to the nerve tissue of the patient and improve the postoperative life quality of the patient.

Description

Medical cutter

Technical Field

The invention relates to the technical field of medical surgical instruments, in particular to a medical cutter.

Background

The belt loop titanium plate is a medical instrument used for fixing tendons in bone tracts in orthopedic reconstruction surgery, and is divided into a fixed titanium plate and an adjustable titanium plate according to whether the length of the belt loop can be adjusted.

In the cruciate ligament reconstruction operation (ACL anterior cruciate ligament/PCL posterior cruciate ligament) using an adjustable titanium plate (as disclosed in chinese patent CN205514853U and US8460379B 2), after the loop length adjustment wire is completed, the doctor cuts the loop length adjustment wire at the knot after tying a plurality of knots around the outside of the titanium plate to resist knot loosening caused by traction of repetitive motion, which would otherwise affect patient recovery, which is not desirable.

U.S. patent No. 20200015804A1 discloses a self-locking titanium plate with adjustable loop length which uses a self-locking knot-forming method to simplify the number of knots required by a doctor when using an adjustable titanium plate. However, a loop is formed of a plurality of stitches or a stitch or weave, and creep of the stitches forming the loop occurs when immersed in a tissue fluid for a long period of time, which is unavoidable. When the titanium plate is used, if doctors cut along the existing operation habit by tightly attaching the self-locking tight knot, the knot can still be loosened due to displacement generated by suture creep.

Disclosure of Invention

Based on this, it is necessary to provide a medical cutter which is adapted to an adjustable self-locking titanium plate and which conforms to the existing surgical habits of doctors.

The application provides a medical cutter comprising:

a cutting assembly located at a distal end of the medical cutter, the cutting assembly comprising a support and a cutting member, the cutting member being rotatable relative to the support, the cutting member being for cutting a suture;

a handle assembly located at the proximal end of the medical cutter for controlling rotation of the cutting member;

a connecting assembly for connecting the cutting assembly with the handle assembly;

and the extension piece is fixedly connected to one end, relatively far away from the connecting assembly, of the cutting assembly and is used for reserving a suture with a preset length when the cutting piece cuts the suture.

So arranged, when the medical cutter cuts the suture, the length of the thread head reserved in the patient is longer because the knotting part of the extension piece abutting the suture is cut; can avoid the phenomenon of loosening after operation, reduce the degree of bad influence of creep of the suture on the patient, reduce the damage to the nerve tissue of the patient and improve the postoperative life quality of the patient.

In one embodiment, the medical cutter further comprises: a first guide structure is provided to the elongate member for guiding the suture from the elongate member into the cutting assembly.

So configured, the suture enters the cutting assembly from the elongate member, so that the length of the thread end reserved for the suture is at least greater than the length of the elongate member, and the length of the thread end can be more accurately adjusted.

In one embodiment, the first guide structure comprises a first guide comprising a guide ring having an openable and closable opening for the suture to enter the guide ring.

So set up, after the suture got into the guide ring of first guide, the opening closure on the guide ring can avoid getting into the suture in the first guide and deviate from the guide ring, avoids the doctor to deviate from in the first guide when shearing the suture, shortens the doctor and corrects the time that the suture consumed before shearing the suture, and the doctor of being convenient for cuts the suture, shortens the time that the operation was implemented.

In one embodiment, the first guide structure further comprises a first guide slot extending from the distal end of the elongate member toward the cutting assembly.

By the arrangement, the first guide groove enables the suture to be close to the preset position set for suture cutting, and accuracy of the cutting piece in suture cutting is improved.

In one embodiment, the medical cutter further comprises: and the second guide structure is arranged on the supporting piece and used for guiding the suture to be sheared by the shearing piece.

So set up, the second guide structure that sets up on support piece is close to the shearing piece, improves the second guide structure to the guiding precision of shearing piece guide suture, improves the stability when the suture is sheared by the shearing piece, shortens the time that the suture was sheared by the shearing piece required to shorten the whole time that consumes of operation.

In one embodiment, the supporting member includes a mounting portion, a side wall portion and a bearing portion, the mounting portion is mounted on the connecting assembly, two ends of the side wall portion are respectively connected to the mounting portion and the bearing portion, the side wall portion is located at a side edge of the cutting member, the bearing portion is located at a distal end of the cutting member, and the bearing portion is used for being matched with the cutting member to cut a suture line;

the second guide structure comprises a second guide groove, and the second guide groove is arranged on the bearing part.

So set up, before shearing the suture, the carrier part that bears the suture keeps away from the shear part relatively, can avoid the condition that the suture was cut by mistake to appear, and the second guide slot is with suture direction shear part, and carrier part and shear part cooperation shear suture of being convenient for to shorten operation time, reduce the damage to patient's nerve tissue.

In one embodiment, the medical cutter has a virtual holding state and a cutting state, in the virtual holding state, the shearing piece can be put on the supporting piece, the shearing piece and the groove wall of the second guide groove enclose to form a containing cavity, the radial dimension of the containing cavity is larger than the radial dimension of a suture, and the containing cavity can contain the suture and allow the medical cutter to slide along the suture;

the medical cutter can be switched from the virtual state to the cutting state under the action of external force, and in the cutting state, the shearing piece is staggered with the bottom wall of the second guide groove so as to shear the suture.

The medical cutter is arranged in the holding state, the holding cavity is used for providing a space for the medical cutter, when the medical cutter is in the holding state, a doctor can pull the suture or push the medical cutter along the suture, and the position between the suture and the medical cutter and the tension of the suture during shearing are adjusted; the radial dimension of the accommodating cavity is larger than that of the suture, so that the smoothness of the medical cutter when pushing along the suture can be improved, meanwhile, the suture can be conveniently sheared by the shearing piece, and the time required by an operation is shortened.

In one embodiment, the shearing member is provided with a first side groove, the side wall portion is provided with a second side groove, and in the virtual holding state, the first side groove is matched with the second side groove to restrict the suture.

So set up, when medical cutterbar is in the deficiency state of holding, the cooperation in first side groove and second side groove can avoid the doctor to pull the suture or promote medical cutterbar along the suture, and the suture deviate from in the second side groove, and the end of a thread length of suture is convenient for the doctor to adjust, improves the reliability of the operation knot that postoperative suture formed to reduce patient's neurovascular damage's risk.

In one embodiment, the second guide structure further comprises a second guide comprising a guide ring having an openable and closable opening for the suture to enter the guide ring.

So set up, when the guide ring of suture entering second guide, the opening closure can avoid the suture to deviate from the second guide, when shearing the suture, because medical cutterbar soaks in the interstitial fluid, so easily skidding when shearing the piece cuts the suture, at this moment, stability and reliability when the piece cuts the suture can be improved to the second guide ring, make the suture sheared by the piece, shorten the required time of cutting the suture, reduce the risk of patient's neurovascular damage.

In one embodiment, the medical cutter is a basket clamp.

The medical cutter is convenient to switch from the virtual holding state to the cutting state, the control degree of a doctor on the operation progress is improved, and the time required by the operation is shortened.

In one embodiment, the length of the extension is 2mm to 15mm.

So configured, the length of the thread ends reserved for the suture is effective against creep of the suture while providing patient comfort.

In one embodiment, a preset inclination angle is formed between the extending direction of the cutting edge of the cutting member and the extending direction of the connecting component.

So set up, when holding the state in the deficiency, the doctor of being convenient for promotes medical cutterbar along the suture, the required operating space is little when promoting.

Drawings

FIG. 1 is a schematic view showing the structure of a medical cutter according to an embodiment of the present invention;

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

FIG. 3 is a schematic view of the medical cutter in a sheared condition;

FIG. 4 is an enlarged partial schematic view at B in FIG. 3;

FIG. 5 is a schematic view of a portion of the structure of FIG. 1;

FIG. 6 is a schematic view of the structure of FIG. 5 from another perspective;

FIG. 7 is a schematic view of the structure of the first guide member and the second guide member in FIG. 1 with the openings thereof being opened;

FIG. 8 is a schematic view of the structure of FIG. 7 from another perspective;

FIG. 9 is a schematic view of the structure of the handle assembly in comparison of the position of the handle assembly prior to and during cutting of the medical cutter;

fig. 10 is a schematic view of the medical cutter in a weakened state prior to preparation for cutting a suture.

Reference numerals:

100. a medical cutter; 10. a cutting assembly; 11. a support; 111. a mounting part; 112. a side wall portion; 1121. a second side groove; 113. a carrying part; 12. a shear member; 121. a first side groove; 20. a handle assembly; 30. a connection assembly; 40. an extension; 50. a first guide structure; 51. a first guide; 52. a first guide groove; 60. a second guide structure; 61. a second guide groove; 62. a second guide; 1. a receiving chamber; 2. a guide ring; 3. an opening; 4. and (5) stitching.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

The terms "proximal" and "proximal" are defined as the end closer to the user and "distal" as the end farther from the user, respectively, according to the distance relative to the user.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring now to fig. 1, fig. 1 shows a schematic view of a medical cutter 100 according to an embodiment of the present invention. The medical cutter 100 is used to cut sutures, guidewires, etc. during a surgical procedure.

Referring to fig. 1 to 10, the present application provides a medical cutter 100 comprising:

a cutting assembly 10 at the distal end of the medical cutter 100, the cutting assembly 10 comprising a support 11 and a cutting member 12, the cutting member 12 being rotatable relative to the support 11, the cutting member 12 being adapted to cut a suture 4;

a handle assembly 20 located at the proximal end of the medical cutter 100 for controlling rotation of the cutter 12;

a connection assembly 30 for connecting the cutting assembly 10 with the handle assembly 20;

an extension member 40 fixedly connected to an end of the cutting assembly 10 opposite from the connecting assembly 30, the extension member 40 being adapted to reserve a predetermined length of suture 4 when the cutting member 12 cuts the suture 4.

So configured, when cutting the suture 4, the medical cutter 100 cuts the end of the thread reserved in the patient's body longer because the extension piece 40 cuts against the knotted portion of the suture 4; can avoid the phenomenon of loosening after operation, reduce the degree of bad influence of creep of the suture 4 on the patient, reduce the damage to the nerve tissue of the patient, and improve the postoperative life quality of the patient.

Referring to fig. 1-10, in one embodiment, the length of the extension 40 is 2mm to 15mm.

So configured, the length of the thread ends reserved for the suture 4 is effective against creep of the suture 4 while providing patient comfort.

Alternatively, the length of the extension 40 is implemented as 2mm to 15mm in this embodiment. In other embodiments of the present application, the length of the extension member 40 may be implemented to be less than 2mm or greater than 15mm, as long as the length of the wire end reserved for the cutting member 12 is adapted to the actual needs of the patient.

It will be appreciated that in embodiments of the present application, the length of extension member 40 may also be implemented in the range of 5mm to 10mm, while preserving the amount of reliable creep while reducing patient foreign body sensation.

Referring to fig. 5, in one embodiment, a predetermined inclination angle is formed between the extending direction (α direction in fig. 5) of the cutting edge of the cutting member 12 and the extending direction (β direction in fig. 5) of the connecting assembly 30.

So arranged, in the virtual holding state, the doctor can push the medical cutter 100 along the suture 4 conveniently, and the operation space required during pushing is small.

It will be appreciated that in this embodiment, the two directions are perpendicular to each other, so that the operation space required by the doctor to push the medical cutter 100 can be reduced to the maximum extent, the smoothness of the shearing surface of the suture 4 can be improved, the foreign body sensation caused by the shearing surface to the patient can be reduced or avoided, and the postoperative life quality of the patient can be improved.

Referring to fig. 1 to 8 and 10, in one embodiment, the medical cutter 100 further comprises: a first guide structure 50, the first guide structure 50 being provided to the elongate member 40, the first guide structure 50 being for guiding the suture 4 from the elongate member 40 into the cutting assembly 10.

So configured, suture 4 enters cutting assembly 10 from elongate member 40, so that the length of the end of thread reserved for suture 4 is at least greater than the length of elongate member 40 and the length of the end of thread can be more precisely adjusted.

Alternatively, in the present embodiment the medical cutter 100 is implemented to include the first guide structure 50, and in other embodiments of the present application, the medical cutter 100 may also be implemented without the first guide structure 50, e.g., in open surgery, the first guide structure 50 may not be provided, so long as the surgeon is able to manually guide the suture 4 from the extender 40 into the cutting assembly 10 during the surgical procedure.

Referring to fig. 7-8, in one embodiment, the first guide structure 50 includes a first guide 51, the first guide 51 including a guide ring 2, the guide ring 2 having an openable and closable opening 3, the opening 3 for the suture 4 to enter the guide ring 2.

So set up, after the guide ring 2 of first guide piece 51 is got into to suture 4, opening 3 on the guide ring 2 is closed, can avoid getting into the suture in the first guide piece 51 and deviate from guide ring 2, avoid doctor when cutting suture 4, suture 4 deviate from in first guide piece 51, shorten doctor's correction suture 4 before cutting suture 4 time spent, be convenient for doctor cut suture 4, shorten the time of operation implementation.

Alternatively, in the present embodiment, the guide ring 2 is implemented with the openable and closable opening 3, and in other embodiments of the present application, the guide ring 2 may be implemented as a C-shaped ring, a radially staggered split ring, or an axially staggered split ring, as long as the probability of the suture 4 coming out of the guide ring 2 can be reduced.

Referring to fig. 1-9, in one embodiment, the first guide structure 50 further includes a first guide slot 52, the first guide slot 52 extending from the distal end of the elongate member 40 toward the cutting assembly 10.

So configured, the first guide slot 52 allows the suture 4 to approach a predetermined position set for cutting the suture 4, improving the accuracy of cutting the suture 4 by the cutting member 12.

Alternatively, in the present embodiment, the first guide groove 52 is implemented as a groove having a smaller radius near the end of the cutting member 12 than the end far from the cutting member 12, and in other embodiments of the present application, the first guide groove 52 may be implemented as a groove having a larger radius near the end of the cutting member 12 than or equal to the radius far from the cutting member 12, as long as the first guide groove 52 can facilitate the cutting of the suture 4 by the cutting member 12.

It will be appreciated that in the present embodiment the first guide slot 52 is implemented with a depth toward the end of the cutting member 12 that is less than a depth away from the end of the cutting member 12, and in other embodiments of the present application the first guide slot 52 may be implemented with a depth toward the end of the cutting member 12 that is greater than or equal to a depth away from the end of the cutting member 12, so long as the first guide slot 52 is capable of facilitating the cutting member 12 to cut the suture 4.

Referring to fig. 1 to 8 and 10, in one embodiment, the medical cutter 100 further comprises: the second guiding structure 60, the second guiding structure 60 is disposed on the supporting member 11, and the second guiding structure 60 is used for guiding the suture 4 to be sheared by the shearing member 12.

The second guiding structure 60 arranged on the supporting piece 11 is close to the cutting piece 12, so that the guiding precision of the second guiding structure 60 for guiding the suture 4 to the cutting piece 12 is improved, the stability of the suture 4 when being cut by the cutting piece 12 is improved, the time required for cutting the suture 4 by the cutting piece 12 is shortened, and the time consumed by the whole operation is shortened.

Alternatively, in the present embodiment, the medical cutter 100 is implemented to include the second guide structure 60, and in other embodiments of the present application, the medical cutter 100 may be implemented to not include the second guide structure 60, for example, in other embodiments, the carrier portion 113 may also be capable of guiding the suture 4 to be sheared by the shearing member 12, where the carrier portion 113 may be implemented as a U-shape, a radially staggered ring shape, or a longitudinally staggered ring shape, as long as the carrier portion 113 is capable of guiding the suture 4 to be sheared by the shearing member 12.

Referring to fig. 2 and fig. 4 to fig. 8 and fig. 10, in one embodiment, the supporting member 11 includes a mounting portion 111, a side wall portion 112 and a bearing portion 113, the mounting portion 111 is mounted on the connecting assembly 30, two ends of the side wall portion 112 are respectively connected to the mounting portion 111 and the bearing portion 113, the side wall portion 112 is located at a side edge of the cutting member 12, the bearing portion 113 is located at a distal end of the cutting member 12, and the bearing portion 113 is used for being matched with the cutting member 12 to cut the suture 4;

the second guiding structure 60 includes a second guiding groove 61, and the second guiding groove 61 is opened at the bearing portion 113.

So set up, before shearing suture 4, bear the weight of portion 113 that has suture 4 and keep away from cutting member 12 relatively, can avoid the circumstances that suture 4 was cut by mistake to appear, second guide slot 61 is with suture 4 direction cutting member 12, and the cooperation of portion 113 and cutting member 12 of being convenient for cuts suture 4 to shorten the operation time, reduce the damage to patient's nerve tissue.

Alternatively, the second guide groove 61 is implemented in a V shape in the present embodiment, and in other embodiments of the present application, the second guide groove 61 may be implemented in a U shape or a C shape as long as the guiding of the second guide groove 61 enables the cutting member 12 to cut the suture 4.

Referring to fig. 1 to 10, in one embodiment, the medical cutter 100 has a virtual holding state and a cutting state, in the virtual holding state, the cutting member 12 can be put on the supporting member 11, the cutting member 12 and the groove wall of the second guiding groove 61 enclose to form a containing cavity 1, the radial dimension of the containing cavity 1 is larger than the radial dimension of the suture thread 4, and the containing cavity 1 can contain the suture thread 4 and allow the cutting member 12 to slide along the suture thread 4;

the medical cutter 100 is capable of being switched from a virtual state to a cutting state by external force, in which the cutting member 12 is staggered with the bottom wall of the second guide groove 61 to cut the suture thread 4.

So arranged, the accommodating cavity 1 provides space for the medical cutter 100 in the virtual state, and when the medical cutter 100 is in the virtual state, a doctor can pull the suture 4 or push the medical cutter 100 along the suture 4, and adjust the position between the suture 4 and the medical cutter 100 and the tension of the suture 4 during shearing; the radial dimension of the accommodating cavity 1 is larger than that of the suture 4, so that the smoothness of the medical cutter 100 when pushing along the suture 4 can be improved, meanwhile, the suture 4 can be sheared by the shearing piece 12 conveniently, and the time required by an operation is shortened.

It will be appreciated that in the present embodiment, when the cutting member 12 is placed on the supporting member 11, the formation of the virtual holding state of the medical cutter 100 is convenient, and the operation without redundancy can be completed, thereby shortening the time required for the medical cutter 100 to form the virtual holding state.

It can be appreciated that in the present embodiment, the medical cutter 100 can be switched from the virtual state to the cutting state by applying an external force to the cutting member 12, so that the switching manner is convenient, and the time required for switching between the two states is shortened, thereby shortening the time required for the operation.

It will be appreciated that in this embodiment, the side of the cutting member 12 facing the extension member 40 is implemented as an arc surface, so that when the medical cutter 100 is pushed along the suture 4 in the human body, the cutting member 12 can be prevented from injuring the rest of the nerve tissue of the patient; and when the medical cutter 100 is switched from the virtual state to the cutting state, the circular arc surface can also reduce the external force required to be increased for switching the state, so that the doctor can conveniently cut the suture 4.

It will be appreciated that in this embodiment the cutting edge of the cutting member 12 cuts to form a cutting plane parallel to the axial cross-section of the suture 4.

It will be appreciated that in this embodiment, when the cutting member 12 cuts the suture 4, the first guide structure 50 and the second guide structure 60 provided on the extension member 40 can make the suture 4 parallel to the extension member 40, and can ensure that the cut surface of the cut suture 4 is substantially the same as the radial plane of the suture 4, and accurately achieve the predetermined length of the thread end of the suture 4, and the predetermined thread end length can effectively creep the suture 4 while making the patient feel comfortable.

It will be appreciated that, before the doctor cuts the suture 4, because the doctor needs to push the medical cutter 100 along the suture 4 to calibrate the length of the thread end of the suture 4, the first guide groove 52 can play a role of along the thread, so that the first guide groove 52 can also reduce the resistance when pushing the medical cutter 100, improve the smoothness when pushing the medical cutter 100 along the suture 4, facilitate the operation of the doctor, and shorten the time required for the operation.

Referring to fig. 2 and fig. 4 to fig. 8 and fig. 10, in one embodiment, the cutting member 12 is provided with a first side groove 121, the side wall portion 112 is provided with a second side groove 1121, and in the virtual holding state, the first side groove 121 and the second side groove 1121 cooperate to restrict the suture 4.

So set up, under the virtual state of medical cutterbar 100, when doctor pulls suture 4 or promotes medical cutterbar 100 along suture 4, first side groove 121 and the cooperation of second side groove 1121 can avoid suture 4 to deviate from second side groove 1121, and the doctor of being convenient for adjusts the end of a thread length of suture 4, improves the reliability of the operation knot that postoperative suture 4 formed.

It should be noted that "constraining suture 4" means that first side groove 121 and second side groove 1121 can cooperate to form an annular space to prevent suture 4 from backing out of the annular space.

Alternatively, in the present embodiment, the first side groove 121 is implemented as a C-shaped groove, and in other embodiments of the present application, the first side groove 121 may be implemented as a G-shaped groove, as long as the first side groove 121 cooperates with the second guide groove 61 to constrain the suture 4 in the virtual holding state of the medical cutter 100.

Alternatively, in the present embodiment, the second side groove 1121 is implemented as a U-shaped groove, and in other embodiments of the present application, the second side groove 1121 may be implemented as a W-shaped groove or a G-shaped groove, so long as the first side groove 121 and the second side groove 1121 can cooperate to form an annular space to avoid the suture 4 from being pulled out of the annular space.

Alternatively, in the present embodiment, the second side slot 1121 is formed on the left side of the medical cutter 100 after being held by the right hand of the doctor, and in other embodiments of the present application, the second side slot 1121 may be formed on the right side of the medical cutter 100 after being held by the left hand of the doctor, so long as the doctor is convenient to adjust the suture 4 to be cut.

Alternatively, in the present embodiment, one of the two sides of the side wall portion 112 is implemented to be provided with a side groove, and in other embodiments of the present application, the two sides of the side wall portion 112 may be implemented to be provided with side grooves, as long as it is convenient for a doctor to cut the suture 4.

Referring to fig. 7-8 and 10, in one embodiment, the second guiding structure 60 further includes a second guiding member 62, the second guiding member 62 includes a guiding ring 2, the guiding ring 2 has an opening 3 that can be opened and closed, and the opening 3 is used for allowing the suture 4 to enter the guiding ring 2.

So configured, when the suture 4 enters the guide loop 2 of the second guide 62, the opening 3 is closed to prevent the suture 4 from backing out of the second guide 62. In addition, when the suture 4 is cut, the medical cutter 100 is immersed in the tissue fluid, and the suture 4 is easily slipped when the cutting member 12 cuts the suture, and at this time, the second guide member 62 can prevent the slipped suture 4 from being pulled out of the second guide ring 2, thereby improving the stability and reliability when the cutting member 12 cuts the suture 4.

Alternatively, in the present embodiment, the guide ring 2 is implemented with the openable and closable opening 3, and in other embodiments of the present application, the guide ring 2 may be implemented as a C-shaped ring, a radially staggered opening 3 ring, or an axially staggered opening 3 ring, as long as the probability of the suture 4 coming out of the guide ring 2 can be prevented from being reduced.

Alternatively, in the present embodiment, the second guiding groove 61 is formed on the carrying portion 113, and in other embodiments of the present application, the second guiding groove 61 may be formed on the second guiding member 62, as long as the doctor can cut the suture 4 with the cutting member 12 conveniently.

It will be appreciated that in this embodiment, the medical cutter 100 is implemented to include the first guide 51 and the second guide 62, so configured as to accurately guide the suture 4 to the cutting member 12, to avoid the suture 4 from being pulled out of the medical cutter 100 when the suture 4 is to be cut, the first guide 51 can avoid the titanium plate from being close to the cutting member, the second guide 62 can avoid the amplitude of the post-cutting tilting of the suture 4 due to the cutting member 12 when the suture 4 is cut, to improve the accuracy of the suture 4 due to the cutting member 12 when the suture 4 is cut, and other embodiments of the medical cutter 100 are possible in other embodiments of the present application.

First kind: the medical cutter 100 is implemented to include only the first guide 51, so as to increase the contact area between the elongate member 40 and the titanium plate when cutting the suture, and to improve the stability of the suture 4 relative to the cutting member 12 when cutting the suture 4, thereby improving the accuracy with which the cutting member 12 cuts the suture 4.

Second kind: the medical cutter 100 is implemented to include only the second guide 62, so that the second guide 62 can avoid the amplitude of the post-shearing tilting of the suture 4 by the shearing member 12 when shearing the suture 4, and improve the accuracy of the shearing of the suture 4 by the shearing member 12.

Third kind: the medical cutter 100 is implemented without the first guide structure 50 and the second guide structure 60, which reduces the production cost of the medical cutter 100 and improves the adjustability of the suture 4 when the medical cutter is in a virtual state.

It will be appreciated that in this embodiment, in other embodiments of the present application, the first guide structure 50 is implemented to include the first guide groove 52 and the second guide structure 60 is implemented to include the second guide groove 61, so that the first guide groove 52 and the second guide groove 61 can accurately guide the suture to the cutting member 12 when cutting the suture 4, improve the accuracy of cutting the suture 4 by the cutting member 12, and shorten the time consumed for calibrating the suture 4 before cutting the suture 4. Other embodiments of the medical cutter 100 may also have other implementations in other embodiments of the present application.

First kind: the first guide structure 50 is implemented to include the first guide groove 52, but the second guide structure 60 is implemented to not include the second guide groove 61, so that the first guide groove 52 brings the suture 4 close to a preset position set for cutting the suture 4, improving accuracy in cutting the suture 4 by the cutter 12.

Second kind: the first guide structure 50 is implemented without the first guide groove 52, but the second guide structure 60 is implemented with the second guide groove 61, and the second guide groove 61 guides the suture 4 to the cutting member 12, so that the bearing part 113 and the cutting member 12 cooperate to cut the suture 4, thereby shortening the operation time and reducing the damage to the nerve tissue of the patient.

Third kind: the first guide structure 50 is implemented without the first guide groove 52 and the second guide structure 60 is also implemented without the second guide groove 61, so that the manufacturing cost of the medical cutter 100 can be reduced.

Referring to fig. 1-10, in one embodiment, the medical cutter 100 is a basket clamp.

By the arrangement, the medical cutter 100 is convenient to switch from the virtual holding state to the cutting state, the control degree of a doctor on the operation progress is improved, and the time required by the operation is shortened.

In other embodiments, a control member may be disposed on the handle assembly 20, and the control member may be a pushing control member, a rotating control member, a pressing control member, or other structures, and the condition of the cutting member 12 from the virtual holding state to the cutting state may be implemented as pushing, rotating, pressing, or the like, so long as the control member can drive the cutting member 12 to accurately cut the suture 4.

Referring to fig. 1 through 10, in an implementation,

first, preparing a first bone tunnel in a femur;

secondly, preparing a second bone tunnel in the tibia;

again, the titanium plate is pulled out of the bone tunnel and against the femoral cortex, tightening the suture 4 to adjust the length of the adjustable loop;

then, the first guide 51 and the second guide 62 on the medical cutter 100 are abutted against the suture 4, so that the suture enters the limited area of the first guide 51 and the second guide 62 to be virtual, and the medical cutter 100 is conveyed to the subcutaneous bone surface along the suture 4;

finally, tensioning the suture 4 while the extension 40 is held against the knot or titanium plate, the handle assembly 20 is actuated to shear, leaving a suture 4 end of equal length as the extension 40.

It will be appreciated that in this embodiment, the procedure is performed with the aid of an arthroscope.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. A medical cutter, comprising:

2. The medical cutter of claim 1, wherein the medical cutter further comprises:

a first guide structure is provided to the elongate member for guiding the suture from the elongate member into the cutting assembly.

3. The medical cutter of claim 2, wherein the first guide structure comprises a first guide comprising a guide ring having an openable and closable opening for the suture to enter the guide ring.

4. The medical cutter of claim 2 or claim 3, wherein the first guide structure further comprises a first guide slot extending from the distal end of the elongate member toward the cutting assembly.

5. The medical cutter of claim 2, wherein the medical cutter further comprises:

and the second guide structure is arranged on the supporting piece and used for guiding the suture to be sheared by the shearing piece.

6. The medical cutter of claim 5, wherein the support member comprises a mounting portion, a side wall portion and a bearing portion, the mounting portion is mounted on the connection assembly, two ends of the side wall portion are respectively connected to the mounting portion and the bearing portion, the side wall portion is located at a side edge of the cutting member, the bearing portion is located at a distal end of the cutting member, and the bearing portion is used for being matched with the cutting member to cut a suture;

7. The medical cutter according to claim 6, wherein the medical cutter has a virtual state and a cutting state, in the virtual state, the cutting member can be put on the supporting member, the cutting member and the groove wall of the second guide groove enclose a containing cavity, the radial dimension of the containing cavity is larger than the radial dimension of a suture, and the containing cavity can contain the suture and allow the cutting member to slide along the suture;

8. The medical cutter of claim 7, wherein the cutting member defines a first side channel and the sidewall defines a second side channel, the first side channel cooperating with the second side channel to constrain the suture in the virtual state.

9. The medical cutter of claim 5, wherein the second guide structure further comprises a second guide comprising a guide ring having an openable and closable opening for the suture to enter the guide ring.

10. The medical cutter of claim 1, wherein the medical cutter is a basket clamp; and/or the number of the groups of groups,

the length of the extension piece is 2mm to 15mm; and/or the number of the groups of groups,

the extending direction of the cutting edge of the shearing piece and the extending direction of the connecting component are provided with a preset inclination angle.