CN116019529B - Interventional cutting device - Google Patents
Interventional cutting device Download PDFInfo
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- CN116019529B CN116019529B CN202310322917.2A CN202310322917A CN116019529B CN 116019529 B CN116019529 B CN 116019529B CN 202310322917 A CN202310322917 A CN 202310322917A CN 116019529 B CN116019529 B CN 116019529B
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- cutting device
- drive shaft
- threading opening
- annular body
- cutting
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Abstract
An interventional cutting device having opposed distal and proximal ends and an axial direction extending therebetween, the cutting device comprising: the inner part of the sheath tube is an extension channel; a head connected to the distal end of the sheath, the head having a working chamber therein in communication with the extension channel, the head further having a lead-through opening through which a workpiece to be cut extends, the lead-through opening in communication with the working chamber; a cutting element rotatably mounted within the working chamber, the cutting element having a blade portion and being operable to be applied to a piece to be cut; a drive shaft is positioned in the extension channel, a distal end of the drive shaft extends into the working chamber to be in linkage with the cutting element, and a proximal end of the drive shaft is used for coupling power. The cutting device can realize the action of cutting in the body, namely, the part of the stay wire which is inserted into the body can be cut off, and the adverse effect of residues of the insertion operation is reduced.
Description
Technical Field
The present application relates to the field of medical devices, and in particular, to an interventional cutting device.
Background
The development of interventional techniques provides the possibility to implement interventional procedures in different scenarios. During interventional therapy, a conveying path of a conveying system is often required to be established through a guide wire, and the guide wire is required to pass through a lesion position and be conveyed to the far end of a blood vessel cavity, so that a subsequent conveying appliance can conveniently reach the lesion position through the guide wire. However, in a few cases, the spinneret end is embedded into the lesion and cannot be taken out due to excessive tortuosity, calcification and the like of the lesion; or when the branch vessel guide wire is protected, after the main vessel is implanted into the bracket, the branch guide wire is extruded, so that the branch guide wire cannot be taken out; or when the intraluminal stent is implanted, the phenomenon that the guide wire cannot be taken out due to the entanglement of the end of the guide wire and the intraluminal stent exists. In addition, during transcatheter aortic valve implantation, it is often necessary to use a capture device to grasp the valve transporter head end (Snare technique) to assist the valve to span the aortic valve annulus, which in rare cases can result in the capture device being squeezed between the newly implanted valve stent and the native valve/annulus for reasons such as native valve calcification.
The different embodiments described above also place higher demands on the skill level of the practitioner and the performance of the interventional instrument. For example, in an actual scene, the guide wire is embedded into a lesion or a bracket, the guide wire can only be pulled forcefully in the traditional mode, the guide wire is broken and remains in the body if the guide wire is light, and the treatment accident can be caused if the guide wire is heavy; in the implementation process of the Snare technology, if the condition that the catcher is entangled with the interventional instrument occurs, the traditional mode can only select surgical open chest operation.
Disclosure of Invention
To solve the above technical problem, the present application provides an interventional cutting device having opposite distal and proximal ends and an axial direction extending between the distal and proximal ends, the cutting device comprising:
the inner part of the sheath tube is an extension channel;
a head connected to the distal end of the sheath, the head having a working chamber therein in communication with the extension channel, the head further having a lead-through opening through which a workpiece to be cut extends, the lead-through opening in communication with the working chamber;
a cutting element rotatably mounted within the working chamber, the cutting element having a blade portion and being operable to be applied to a piece to be cut;
a drive shaft is positioned in the extension channel, a distal end of the drive shaft extends into the working chamber to be in linkage with the cutting element, and a proximal end of the drive shaft is used for coupling power.
The following provides several alternatives, but not as additional limitations to the above-described overall scheme, and only further additions or preferences, each of which may be individually combined for the above-described overall scheme, or may be combined among multiple alternatives, without technical or logical contradictions.
Optionally, the threading opening and the extension channel are arranged in a staggered manner.
Optionally, the head comprises a first portion at a distal end, a second portion at a proximal end, and a body portion between the first portion and the second portion, the working chamber comprising a receiving zone within the body portion, and a transition zone within the second portion;
the cutting element is located within the receiving zone.
Optionally, the first portion and the second portion each converge with respect to the body portion shape.
Optionally, two ends of the threading opening are respectively opened on the outer peripheral surfaces of the first part and the second part.
Optionally, the transition region is coaxially arranged with the extension channel and aligned with a central portion of the accommodating region, and the threading opening is eccentrically arranged with respect to the accommodating region.
Optionally, the accommodation region has a larger radial dimension relative to the transition region, and comprises:
a central region aligned with the transition region;
the extension area is arranged at the periphery of the central area, and the threading opening is communicated with the extension area.
Optionally, the working chamber further includes a spacing region aligned with the central region and distal to the receiving region, the distal end of the drive shaft extending into the spacing region.
Optionally, the limit region is closed at the distal end of the head.
Optionally, the outer peripheral surface of the driving shaft is matched with the inner walls of the transition area and the limit area.
Optionally, the cutting element comprises:
an annular body wound around the periphery of the drive shaft, the blade being at an outer peripheral surface of the annular body;
and the elastic piece is connected between the driving shaft and the annular body, and the radial relation between the annular body and the driving shaft is changed through the deformation of the elastic piece.
Optionally, the annular body has:
a free state in which at least a part of the blade is located in the threading opening and on a side of the threading opening that is farther from the drive shaft, the elastic member driving the annular body to be kept in the free state by elastic potential energy;
in the working state, the blade part in the threading opening is extruded by the piece to be cut and is closer to the driving shaft relative to the free state.
Optionally, the elastic member is a plurality of elastic arms.
Optionally, the elastic arms are arranged in sequence along the circumferential direction, one end of each elastic arm is fixed to the driving shaft, and the other end is fixed to the inner edge of the annular body.
Optionally, the length of the resilient arm is greater than the radial gap dimension between the drive shaft and the annular body.
Optionally, the resilient arm extends along a helical path.
Optionally, the blade is a saw tooth or roughened surface distributed around the circumference of the annular body.
Optionally, the distal end portion of the sheath tube and the head are integrally formed, or are spliced and fixed in a split manner.
Optionally, the insertion and fixation is that the distal end of the sheath tube is inserted into the transition zone, or the proximal end of the second part is provided with a connecting tube, and the distal end of the sheath tube is inserted into the connecting tube or sleeved outside the connecting tube.
Optionally, the threading opening and the extending channel are coaxially arranged, one end of the threading opening is opened on the outer peripheral surface of the head, and the other end of the threading opening is communicated with the working cavity.
Optionally, the driving shaft is hollow and cylindrical, the interior of the driving shaft is provided with a piece to be cut to extend through, the cutting element is annular, and the blade part is positioned at the inner edge of the cutting element and faces the axis of the cutting element.
Optionally, the driving shaft is a flexible shaft.
Optionally, the power is provided by at least one of manual operation, electric operation and pneumatic operation.
The cutting device can be inserted into the body, and under the guiding effect of the threading opening, the cutting device is inserted into the body along the path of the to-be-cut piece, an operator can operate at the proximal end of the cutting device, gradually move the cutting device to the distal end and insert into the blood vessel in the body, after the head is inserted into the body to reach the preset position, the cutting action can be realized in the body, and the part of the inserted body can be pulled to be cut off, so that the adverse effect of residues of the intervention operation is reduced.
Drawings
Fig. 1 is a schematic structural view of a cutting device provided in the present application;
FIG. 2 is a partial cross-sectional view I of a cutting device provided herein;
FIG. 3 is a partial cross-sectional view II of the cutting device provided herein;
fig. 4 is a schematic structural view of a threading opening of the cutting device provided by the application;
FIG. 5 is a cross-sectional view of a head of a cutting device provided herein;
FIG. 6 is a perspective cross-sectional view of a head of a cutting device provided herein;
FIG. 7 is a schematic view of the structure of the ring body of the cutting device provided in the present application in a free state;
FIG. 8 is a schematic view of the structure of the cutting device provided in the present application in an operating state;
fig. 9 is a schematic structural view of a cutting device provided in the present application after cutting a workpiece to be cut;
fig. 10 to 11 are schematic structural views of a head portion and a sheath tube of the cutting device provided by the present application;
FIG. 12 is a schematic view of a cutting device with a coaxial structure of a threading opening and an extension channel;
FIG. 13 is a schematic view of the cutting element and the workpiece to be cut in FIG. 12;
FIG. 14 is a schematic view showing a structure of the cutting member of FIG. 13 in a state of cutting a workpiece;
fig. 15 is a schematic diagram of a structure in which the threading opening and the extension channel of the cutting device provided by the present application are coaxial.
Reference numerals in the drawings are described as follows:
1. a cutting device; 11. a distal end; 12. a proximal end; 13. a sheath; 131. an extension channel; 14. a head; 141. a working chamber; 1411. a receiving area; 1412. a transition zone; 1413. a central region; 1414. an extension region; 1415. a limit area; 142. a threading opening; 1421. a step; 143. a first portion; 144. a main body portion; 145. a second portion; 1451. a connecting pipe; 15. a cutting element; 151. a blade section; 152. an annular body; 153. an elastic member; 1531. an elastic arm; 16. a drive shaft;
2. and (5) a piece to be cut.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
It will be understood that 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. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-2, an embodiment of the present application provides an interventional cutting device 1 having opposed distal and proximal ends 11, 12, and an axial direction extending therebetween, the distal end 11 being understood to be the end remote from the operator and the proximal end 12 being understood to be the end proximate the operator.
The cutting device 1 comprises a sheath 13, a head 14, a cutting element 15 and a driving shaft 16, wherein the head 14 is connected to the distal end of the sheath 13, an extension channel 131 is arranged inside the sheath 13, a working cavity 141 communicated with the extension channel 131 is arranged in the head 14, and the extension channel 131 is mainly used for the driving shaft 16 to pass through and support the driving shaft 16.
The head 14 is further provided with a threading opening 142 through which the piece 2 to be cut (e.g., a wire) extends, the threading opening 142 being in communication with the working chamber 141, so that the piece 2 to be cut penetrates the threading opening 142 and the working chamber 141.
The cutting element 15 is rotatably mounted in the working cavity 141, the cutting element 15 has a plurality of blades 151 and can act on the workpiece 2 to be cut in the threading opening 142, the driving shaft 16 is located in the extension channel 131, the distal end of the driving shaft 16 extends into the working cavity 141 to be linked with the cutting element 15, the proximal end of the driving shaft 16 is used for coupling power and transmitting direct power to the cutting element 15, it can be understood that the cutting element 15 rotates after being driven by the driving shaft 16, the continuously rotating blades 151 cut off the workpiece 2 to be cut, and the cutting point of the workpiece 2 to be cut is located in the working cavity 141 of the head 14. In addition, the implementation action of an operator can be timely and effectively transmitted to the cutting element, and the cutting efficiency is further improved.
The head 14 can be inserted into a blood vessel in a body, and is inserted into the body along the to-be-cut piece 2 under the guiding action of the threading opening 142, and an operator can push the head 14 to gradually move distally and be inserted into the blood vessel in the body by using a holding part such as a handle connected with the sheath 13.
For example, in the existing interventional guide wire or Snare technology, the guide wire or the snapper may be entangled with the interventional instrument, and at this time, the snapper rope may be cut off by using the cutting device of the present application.
Regarding the relative positions of the threading opening and the extending channel, the threading opening and the extending channel can be arranged in a staggered manner or coaxially arranged, the coaxial arrangement can be understood as that the central lines of the threading opening and the extending channel are coincident, otherwise, the threading opening and the extending channel are arranged in a staggered manner, the central lines of the threading opening and the extending channel can be parallel or obliquely arranged under the condition of staggered arrangement, and in order to reduce the intervention resistance, the central lines of the threading opening and the extending channel are preferably parallel.
When the lead-through is offset from the extension channel, referring to fig. 3, head 14 includes a first portion 143 at distal end 11, a second portion 145 at proximal end 12, and a body portion 144 between first portion 143 and second portion 145, working chamber 141 includes a receiving area 1411 within body portion 144, and a transition area 1412 within second portion 145, transition area 1412 primarily serving to communicate receiving area 1411 with extension channel 131.
The cutting element 15 is positioned within the receiving zone 1411 with the extension passage 131 communicating to the receiving zone 1411 via the transition zone 1412 such that the drive shaft 16 can pass through the extension passage 131, the transition zone 1412 and be in linkage with the cutting element 15 in sequence.
The first portion 143 and the second portion 145 each have a converging shape in the body portion 144, and the head 14 is generally spindle-shaped, allowing the entire head to be more easily inserted into or withdrawn from the body.
Referring to fig. 4, when the threading opening and the extending passage are arranged in a staggered manner, the extending passage is located at the center of the cutting device, the threading opening 142 is arranged eccentrically, and both ends of the threading opening 142 are respectively opened at the outer circumferential surfaces of the first portion 143 and the second portion 145, so that the workpiece 2 to be cut can completely penetrate the head.
To better accommodate the relative angle of the head 14 and the piece to be cut, the distal end of the lead-through opening 142 is radially open to prevent greater resistance between the head and the piece to be cut during movement in the body, with the radial dimension D1 of the open portion being greater than the lead-through opening inner diameter D2 at the second portion 145.
In order to further stabilize the position of the workpiece to be cut, the region of the threading opening 142 at the first portion 143 may be radially opened only at the distal end, and the inner diameter D2 (see the step 1421 with the cross section in fig. 4) is basically maintained at the side adjacent to the accommodating area 1411, so that the portion of the workpiece to be cut located in the accommodating area 1411 is limited, avoiding the workpiece to be cut from avoiding the cutting element 15, enabling the cutting element 15 to always abut against the workpiece to be cut, and ensuring the cutting effect.
The transition region 1412 is coaxially disposed with the extension passage 131 to ensure stability of the drive shaft as it rotates within the passage.
The transition region 1412 is aligned with the central portion of the receiving region 1411 such that one end of the drive shaft 16 passes through the extension passage 131 and is centered in the receiving region 1411 for convenient alignment with the center of the cutting element 15.
The lead-through 142 is arranged eccentrically with respect to the receiving zone 1411 to facilitate alignment and cutting of the blade 151 of the outer periphery of the cutting element with the piece to be cut.
Referring to fig. 5, the receiving zone 1411 has a larger radial dimension relative to the transition zone 1412 because the receiving zone 1411 receives the drive shaft, cutting element, and piece to be cut simultaneously. The accommodation area 1411 includes a central area 1413, an expansion area 1414 located at the periphery of the central area 1413, the central area 1413 being aligned with the transition area 1412, and the lead-through 142 being connected to the expansion area 1414.
Referring to fig. 6, working chamber 141 further includes a stop zone 1415 aligned with central zone 1413 and distal to receiving zone 1411, the distal end of drive shaft 16 extending into stop zone 1415 to stop the distal end of drive shaft 16 and reduce wobble.
The stop zone 1415 is closed at the distal end of the head 14 to prevent the distal end of the drive shaft from being disturbed by the in vivo environment.
The outer peripheral surface of the driving shaft 16 is matched with the inner walls of the transition zone 1412 and the limit zone 1415, so that shaking is avoided when the driving shaft 16 rotates, and the stability of power transmission is ensured.
Referring to fig. 7 to 9, the cutting member 15 includes an annular body 152, an elastic member 153, the annular body 152 being wound around the periphery of the drive shaft 16 and being located in the expanded region 1414, the blade 151 being located at the outer peripheral surface of the annular body 152.
The elastic member 153 serves to transmit power, the elastic member 153 is connected between the driving shaft 16 and the annular body 152, the annular body 152 changes the radial relation with the driving shaft 16 through deformation of the elastic member 153, and radial movement of the two has a specific orientation, for example, when the elastic member is not deformed in fig. 7, the annular body 152 is in a coaxial state with the driving shaft 16, for example, when the elastic member is deformed in fig. 8, the annular body 152 is in an eccentric state with the driving shaft 16, and the center of the annular body 152 moves radially in a direction opposite to the threading position (for example, direction a in the figure), and the radial relation between the annular body 152 and the workpiece to be cut is changed at the same time when the radial relation between the annular body 152 and the driving shaft 16 is changed.
During the repositioning of the annular body, the annular body 152 has a relative free condition (as shown in fig. 7) and an operating condition (as shown in fig. 8), which is understood to mean that the piece 2 to be cut is in the threading mouth 142 with the outer edge of the annular body 152 abutting, the annular body 152 being slightly eccentric with respect to the drive shaft 16. The free state is understood to mean that the annular body 152 is not radially abutted, such as a state in which cutting has been completed, or a pre-molded state of the annular body 152 with respect to the driving shaft at the elastic member 153.
In the free state, at least a part of the blade 151 is located in the threading opening 142 on the side of the threading opening 142 that is farther from the drive shaft 16, and in the working state, a part of the blade 151, that is, the part located in the threading opening 142 is pressed by the workpiece 2 to be cut, closer to the drive shaft 16 than in the free state.
After the annular body 152 is subjected to the radial abutting action, the elastic piece 153 deforms and stores energy release, when the cutting element cuts, the annular body 152 tends to a free state through the release of elastic potential energy, namely, the annular body is switched from a working state to the free state, the driving shaft 16 is driven to rotate (clockwise in the drawing) by power, the annular body 152 is driven to rotate synchronously, the blade 151 in the threading opening 142 cuts the piece 2 to be cut all the time, and finally the piece 2 to be cut is cut off, and the annular body 152 returns to the free state (shown in fig. 9).
When the cutting device is not inserted into the body, the annular body is in a free state, and the cutting element as a whole is in a substantially centered position within the head, with the annular body at least partially covering the lead-through. In addition, since the head is inserted into the body along the path of the guide wire, the guide wire needs to pass through the threading opening before the cutting device is inserted into the body, and the auxiliary tool can be inserted into the head to push the cutting element, so that the annular body is offset radially and far away from the threading opening, and the guide wire can smoothly pass through the threading opening, namely, the threading of the guide wire is completed, and the cutting device can be inserted into the body in the state shown in fig. 8. In a subsequent cutting of the cutting element, the initial position of the cutting element is also in an eccentric condition as shown in fig. 8.
The elastic member 153 is a plurality of elastic arms 1531, and can uniformly provide restoring force to the ring body 152.
The elastic arms 1531 are disposed in sequence along the circumferential direction, and each elastic arm 1531 is fixed to the driving shaft 16 (which may be fixed by plugging) at one end and to the inner edge of the annular body 152 at the other end. Each elastic arm 1531 may be fixedly connected to the ring body 152 in an integrally formed manner.
The length of the resilient arms 1531 is greater than the radial gap dimension between the drive shaft 16 and the annular body 152, thereby extending the deformed length of the resilient arms 1531 and enhancing the resilient return force.
The resilient arm 1531 extends along a helical path and is helical in a manner consistent with the steering of the drive shaft, which is clockwise in the figures, the resilient arm 1531 may collapse in a clockwise direction to allow the annular body 152 to be eccentric relative to the drive shaft.
The blade 151 is a saw tooth or roughened surface distributed around the outer periphery of the annular body 152, which produces a stable cutting force upon rotation.
The distal end portion of the sheath 13 and the head 14 are integrally formed or are separately inserted and fixed, so that the purpose of communicating the extension channel 131 with the working chamber 141 can be achieved, and an improved manner is provided below.
Referring to fig. 10-11, the docking may be accomplished by inserting the distal end of the sheath 13 into the transition region 1412, or may be accomplished with a connecting tube 1451 at the proximal end of the second portion 145, with the distal end of the sheath 13 inserted into the connecting tube 1451 or outside of the connecting tube 1451.
The structure in which the threading opening and the extending passage are coaxially arranged is improved, and referring to fig. 12 to 14, the extending passage 131 and the threading opening 142 are both located at the central position of the cutting device, one end of the threading opening is opened at the outer peripheral surface of the head 14, and the other end is communicated with the working chamber 141, that is, the workpiece 2 to be cut passes through the center of the cutting device 1 in the state in which the threading opening and the extending passage are coaxially arranged, and sequentially penetrates through the extending passage 131, the working chamber 141 and the threading opening 142.
The drive shaft 16 is hollow and cylindrical and internally extends through the piece to be cut, the cutting element 15 is annular, and the blade 151 is located at the inner edge of the cutting element and faces the axis of the cutting element.
When a cut is required, the drive shaft 16 drives the cutting element in rotation, and the operator tightens the piece to be cut, so that the piece to be cut approaches the blade 151, and the blade 151 continuously rotating cuts off the piece to be cut 2.
In addition, as shown in fig. 15, a plurality of incisions may be formed at the distal opening of the driving shaft, the cutting element may be composed of a plurality of blades and fixed in the distal opening of the driving shaft, a tapered surface structure is formed in the working chamber 141, and when the driving shaft rotates, the distal opening of the driving shaft is gradually reduced by the tapered surface structure, and the plurality of blades of the cutting element are gradually retracted until the workpiece to be cut is cut off.
In addition, the drive shaft 16 is flexible so as to accommodate the complex path of the body's curves after intervention.
The power supply mode of the present application is at least one of manual operation, electric operation and pneumatic operation, and directly acts on the driving shaft 16 to realize the rotation of the driving shaft 16 in a single direction.
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. When technical features of different embodiments are embodied in the same drawing, the drawing can be regarded as a combination of the embodiments concerned also being disclosed at the same time.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application.
Claims (16)
1. An interventional cutting device having opposed distal and proximal ends and an axial direction extending therebetween, the cutting device comprising:
the inner part of the sheath tube is an extension channel;
a head connected to the distal end of the sheath, the head comprising a first portion at the distal end, a second portion at the proximal end, and a body portion between the first portion and the second portion, a working chamber in the head in communication with the extension channel, the working chamber comprising a receiving area in the body portion, and a transition area in the second portion, the head further having a passthrough for a piece to be cut to extend therethrough, the passthrough in communication with the working chamber;
a cutting element rotatably mounted in the receiving area, the cutting element having a blade portion and being operable to be applied to a piece to be cut;
a drive shaft is positioned in the extension channel, a distal end of the drive shaft extends into the working chamber to be in linkage with the cutting element, and a proximal end of the drive shaft is used for coupling power.
2. The cutting device of claim 1, wherein the threading opening is offset from the extension channel.
3. The cutting device of claim 1, wherein the first portion and the second portion each converge in shape with the body portion.
4. The cutting device of claim 1, wherein both ends of the threading opening are open to outer peripheral surfaces of the first portion and the second portion, respectively.
5. The cutting device of claim 1, wherein the transition zone is coaxially disposed with the extension channel and aligned with a central portion of the receiving zone, and the threading opening is eccentrically disposed with respect to the receiving zone.
6. The cutting device of claim 5, wherein the receiving zone has a greater radial dimension relative to the transition zone, and comprises:
a central region aligned with the transition region;
the extension area is arranged at the periphery of the central area, and the threading opening is communicated with the extension area.
7. The cutting device of claim 5, wherein the working chamber further comprises a stop zone aligned with the central zone and distal to the receiving zone, the distal end of the drive shaft extending into the stop zone.
8. A cutting device according to any one of claims 1 to 3, wherein the cutting element comprises:
an annular body wound around the periphery of the drive shaft, the blade being at an outer peripheral surface of the annular body;
and the elastic piece is connected between the driving shaft and the annular body, and the radial relation between the annular body and the driving shaft is changed through the deformation of the elastic piece.
9. The cutting device of claim 8, wherein the annular body has:
a free state in which at least a part of the blade is located in the threading opening and on a side of the threading opening that is farther from the drive shaft, the elastic member driving the annular body to be kept in the free state by elastic potential energy;
in the working state, the blade part in the threading opening is extruded by the piece to be cut and is closer to the driving shaft relative to the free state.
10. The cutting device of claim 8, wherein the resilient member is a plurality of resilient arms.
11. The cutting device of claim 10, wherein each of the resilient arms is circumferentially disposed one after the other, each of the resilient arms being secured at one end to the drive shaft and at the other end to an inner edge of the annular body.
12. The cutting device of claim 11, wherein the length of the resilient arms is greater than a radial gap dimension between the drive shaft and the annular body.
13. The cutting device of claim 11, wherein the resilient arm extends along a helical path.
14. The cutting device of claim 1, wherein the distal portion of the sheath is integrally formed with the head or is separately inserted and secured.
15. The cutting device according to claim 1, wherein the threading opening is arranged coaxially with the extension passage, one end of the threading opening is open to the outer peripheral surface of the head, and the other end is communicated with the working chamber.
16. The cutting device of claim 15, wherein the drive shaft is hollow and cylindrical and has an interior through which the piece to be cut extends, the cutting element is annular, and the blade is located at an inner edge of the cutting element and faces an axial center of the cutting element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310322917.2A CN116019529B (en) | 2023-03-30 | 2023-03-30 | Interventional cutting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310322917.2A CN116019529B (en) | 2023-03-30 | 2023-03-30 | Interventional cutting device |
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| CN116019529A CN116019529A (en) | 2023-04-28 |
| CN116019529B true CN116019529B (en) | 2023-07-21 |
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| CN202310322917.2A Active CN116019529B (en) | 2023-03-30 | 2023-03-30 | Interventional cutting device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2415404A1 (en) * | 2010-08-06 | 2012-02-08 | Tornier, Inc. | Arthroscopic device for cutting a suture and arthroscopic surgical kit including such a device |
| CN107669303A (en) * | 2017-09-30 | 2018-02-09 | 中国人民解放军第二军医大学第二附属医院 | Wire cutter |
| CN110167457A (en) * | 2016-09-09 | 2019-08-23 | 特鲁莫医疗公司 | System for suture trimming |
| CN114727830A (en) * | 2019-07-15 | 2022-07-08 | 复心公司 | Tether cutting device and method |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR8804708A (en) * | 1988-09-13 | 1990-05-01 | Vnii Glaznykh Boleznei | SCISSORS FOR MICRO SURGERIES |
| US6398795B1 (en) * | 2000-11-30 | 2002-06-04 | Scimed Life Systems, Inc. | Stapling and cutting in resectioning for full thickness resection devices |
| US20060122633A1 (en) * | 2002-06-13 | 2006-06-08 | John To | Methods and devices for termination |
| US8246640B2 (en) * | 2003-04-22 | 2012-08-21 | Tyco Healthcare Group Lp | Methods and devices for cutting tissue at a vascular location |
| WO2005084562A2 (en) * | 2004-03-04 | 2005-09-15 | Straub Medical Ag | Catheter for sucking, fragmenting removing material extractable from blood vessels |
| WO2013081659A1 (en) * | 2011-04-11 | 2013-06-06 | St. Jude Medical Puerto Rico Llc | Suture locking device and methods |
| WO2015017114A2 (en) * | 2013-07-31 | 2015-02-05 | Atheromed, Inc. | Atherectomy devices |
| EP3035876B1 (en) * | 2013-09-18 | 2018-11-14 | Xablecath Inc. | Device and system for crossing and treating an occlusion |
| US9247935B2 (en) * | 2013-09-23 | 2016-02-02 | Ceterix Orthopaedics, Inc. | Arthroscopic knot pusher and suture cutter |
| US9820734B2 (en) * | 2014-06-24 | 2017-11-21 | Cook Medical Technologies Llc | Device for cutting suture from a distance |
| US10206706B2 (en) * | 2015-05-29 | 2019-02-19 | Medtronic Xomed, Inc. | Inner tubular member for angled rotary surgical instrument |
| US20170105762A1 (en) * | 2015-10-15 | 2017-04-20 | Medtronic Advanced Energy Llc | Lead extraction |
| KR20220079979A (en) * | 2019-10-18 | 2022-06-14 | 보스톤 싸이엔티픽 싸이메드 인코포레이티드 | filament cutting machine |
| CN111035431A (en) * | 2019-12-10 | 2020-04-21 | 奥斯奥鹏河北医疗器械销售有限公司 | Endoscope system, trepan assembly and protective sheath |
| CN113367774B (en) * | 2020-07-06 | 2022-07-19 | 杭州启明医疗器械股份有限公司 | Interventional instrument delivery system |
| CN112057145A (en) * | 2020-09-11 | 2020-12-11 | 刘雪平 | Cutting saw knife mechanism for percutaneous puncture drainage |
| CN114680967A (en) * | 2020-12-31 | 2022-07-01 | 杭州德诺电生理医疗科技有限公司 | Thread cutting device |
| CN112890908A (en) * | 2021-04-17 | 2021-06-04 | 常州闻拓医疗器械有限公司 | Visual trepan external member |
-
2023
- 2023-03-30 CN CN202310322917.2A patent/CN116019529B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2415404A1 (en) * | 2010-08-06 | 2012-02-08 | Tornier, Inc. | Arthroscopic device for cutting a suture and arthroscopic surgical kit including such a device |
| CN110167457A (en) * | 2016-09-09 | 2019-08-23 | 特鲁莫医疗公司 | System for suture trimming |
| CN107669303A (en) * | 2017-09-30 | 2018-02-09 | 中国人民解放军第二军医大学第二附属医院 | Wire cutter |
| CN114727830A (en) * | 2019-07-15 | 2022-07-08 | 复心公司 | Tether cutting device and method |
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