CN115363711A - Interatrial septum puncture needle with adjustable needle tip extension length - Google Patents
Interatrial septum puncture needle with adjustable needle tip extension length Download PDFInfo
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- CN115363711A CN115363711A CN202211008205.5A CN202211008205A CN115363711A CN 115363711 A CN115363711 A CN 115363711A CN 202211008205 A CN202211008205 A CN 202211008205A CN 115363711 A CN115363711 A CN 115363711A
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- 210000004971 interatrial septum Anatomy 0.000 title claims abstract description 12
- 239000004698 Polyethylene Substances 0.000 claims description 8
- 230000001746 atrial effect Effects 0.000 claims description 8
- 229920000573 polyethylene Polymers 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- -1 polyethylene Polymers 0.000 claims description 6
- 210000003157 atrial septum Anatomy 0.000 claims description 5
- 229920002614 Polyether block amide Polymers 0.000 claims description 4
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 4
- 239000010963 304 stainless steel Substances 0.000 claims description 3
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 230000006378 damage Effects 0.000 abstract description 8
- 208000001848 dysentery Diseases 0.000 abstract description 7
- 208000027418 Wounds and injury Diseases 0.000 abstract description 6
- 208000014674 injury Diseases 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 8
- 206010003658 Atrial Fibrillation Diseases 0.000 description 4
- 210000005246 left atrium Anatomy 0.000 description 4
- 238000001356 surgical procedure Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000004606 Fillers/Extenders Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 210000005245 right atrium Anatomy 0.000 description 2
- 230000002792 vascular Effects 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
- A61B17/3439—Cannulas with means for changing the inner diameter of the cannula, e.g. expandable
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B2017/3454—Details of tips
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B2017/347—Locking means, e.g. for locking instrument in cannula
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Pathology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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Abstract
The embodiment of the specification provides an interatrial septum puncture needle with an adjustable needle point extending length, which comprises: the puncture needle comprises a puncture needle body, a sheath tube, an expander, a needle tube and a needle core, wherein the sheath tube, the expander, the needle tube and the needle core are sequentially sleeved from outside to inside; the near end of the puncture needle main body is connected with a control handle, and the far end of the control handle is in threaded connection with a luer part; the control handle is internally provided with a hollow structure, and the proximal end of the needle core and the distal end of the luer part are mutually connected and positioned in the hollow structure; when the luer part rotates towards the first direction to enable the luer part to move a first preset distance along the radial direction, the needle tip at the far end is driven to move to a first preset position which is away from the top point of the far end of the dilator and meets the first preset distance. The dilator is controlled to extend out and retract from the needle core by rotating the Ruhr component, so that the extension length of the needle core can be conveniently controlled, the operation is convenient, unnecessary human body injury is avoided, and the operation risk is reduced.
Description
Technical Field
The specification relates to the technical field of medical equipment, in particular to an interatrial septum puncture needle with an adjustable needle point extension length.
Background
In the surgical treatment of atrial fibrillation (atrial fibrillation), one of the important operating steps is atrial septal puncture, using a septal puncture needle to penetrate the apparatus from the fossa ovalis under the guidance of an imaging device to create a right atrium access to the left atrium in preparation for further surgery in the left atrium.
At the puncture in-process of current interatrial septum pjncture needle, when the nook closing member of pjncture needle passes through the expander, can be spacing by the expander, lead to the protrusion length of nook closing member to be the fixed value, be unfavorable for the protrusion length of adjustment nook closing member when the puncture, be unfavorable for the puncture operation, and fish tail vascular wall when puncturing the in-process easily arouses unnecessary damage.
Disclosure of Invention
In view of this, the embodiments of the present disclosure provide an interatrial puncture needle with an adjustable needle tip extension length, which can conveniently adjust the length of the needle core extending out of the dilator, thereby facilitating the operation, and when necessary, the needle core can be retracted into the dilator, thereby avoiding unnecessary injuries and reducing the risk of the operation.
The embodiment of the specification provides the following technical scheme:
an interatrial septum puncture needle with an adjustable needle tip extension, comprising:
the puncture needle comprises a puncture needle body, wherein the puncture needle body comprises a sheath tube, an expander, a needle tube and a needle core which are sequentially sleeved from outside to inside, the distal end of the expander is exposed out of the distal end of the sheath tube, and the needle core can reciprocate in the needle tube;
the control handle is connected with the near end of the puncture needle main body, and the near end of the control handle is in threaded connection with a luer part;
when the luer part rotates towards the first direction to enable the luer part to move a first preset distance along the radial direction, the luer part drives the needle point at the distal end of the stylet to move to a first preset position which is far away from the vertex of the distal end of the dilator and meets the first preset distance.
The interatrial septum puncture needle is provided with a control handle with an improved structure, a Ruhr part is in threaded connection with the control handle, a hollow structure is formed in the control handle, the Ruhr part is rotated to enable the far end of the Ruhr part to move in the hollow structure, the whole needle core is driven to move along with the Ruhr part, and therefore the needle point at the far end of the needle core extends out of the far end of the dilator; the needle tip can stay at a preset position by locking the thread structure; the extending length of the needle point can be adjusted by rotating the Ruhr part, so that the atrial septal puncture operation in the operation is facilitated; when necessary, the luer part is reversely rotated, so that the needle tip can be retracted into the dilator, unnecessary human body injury is avoided, and the operation risk is reduced.
The invention also provides a scheme, wherein a limiting block is arranged at the far end of the luer part, and when the luer part moves to the position where the limiting block is abutted against the near end of the hollow structure, the needle point retracts to a second preset position in the dilator.
The invention also provides a scheme that the second preset position comprises a position that the vertex of the needle tip is positioned at the vertex of the far end of the dilator.
The invention further provides a scheme that a knob is arranged at the near end of the luer assembly, and when the knob abuts against the far end of the control handle, the limiting block is located at a position which is away from the near end of the hollow structure and meets a second preset distance.
The invention also provides a scheme that the axis of the luer part is coincident with the axis of the stylet.
The invention also provides a scheme that the axis of the control handle is coincident with the axis of the luer part.
The invention also provides a scheme that the thread pitch of the luer part is 1.0-2.0 mm.
The invention also provides a scheme, and the luer part is made of any one of polycarbonate, polyethylene, 304 stainless steel and ABS plastic.
The invention also provides a scheme, and the manufacturing material of the dilator comprises any one of polyethylene and polyether block amide.
The present invention also provides a solution where the proximal end of the hub is bolted to the distal end of the luer part.
Compared with the prior art, the beneficial effects that can be achieved by the at least one technical scheme adopted by the embodiment of the specification at least comprise: through the structural improvement of the control handle, a thread structure is arranged at the near end of the control handle and is used for being in threaded connection with a luer structure, a hollow structure is arranged in the control handle and provides space for the luer structure to move, when the luer structure is rotated, a needle core can be driven to move in a needle tube through the connecting position of the far end of the luer structure, so that the needle point at the far end of the needle core extends out or returns to the far end of the dilator, and the needle point can be fixed at a specific position away from the far end of the dilator through the locking effect of threads, so that the extending length of the needle point can be conveniently adjusted, the needle core can be conveniently locked, the extending length of the needle point is kept, and when necessary, the needle point can be returned into the dilator through reversely rotating the luer structure to adapt to the surgical operations of readjusting the puncture position, moving for a long distance and the like. The atrial septal puncture needle with the structure has the advantages of simple structure, easy production and manufacture, capability of providing flexible and various operation operations, good applicability, capability of avoiding unnecessary human body injury and reduction of operation risk.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a side view of an embodiment of an adjustable tip extension atrial septum introducer needle;
FIG. 2 is a schematic side view of an embodiment of a needle cannula with a stylet extending therefrom;
fig. 3 is a side schematic view of a control handle threadedly coupled to a luer member in one embodiment;
fig. 4 is a schematic cross-sectional view of the control handle with the luer member rotationally moved to the distal-most end in one embodiment;
fig. 5 is a schematic cross-sectional view of a control handle with rotational movement of the luer part to the proximal end in one embodiment;
fig. 6 is a schematic cross-sectional view of the control handle with the luer part in an intermediate position in one embodiment;
FIG. 7 is a schematic cross-sectional view of the stylet within the extender in one embodiment;
FIG. 8 is a schematic cross-sectional view of a hub site extension extender in one embodiment;
the reference numbers used in the figures are as follows:
1. the puncture needle comprises a puncture needle body 11, a needle tube 12, a needle core 121, a needle point 2, a control handle 21, a handle body 22, a luer part 221, an external thread 222, a knob 223, a limiting block 3 and a dilator.
Detailed Description
Embodiments of the present application are described in detail below with reference to the accompanying drawings.
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. The application is capable of other and different embodiments and its several details are capable of modifications and various changes in detail without departing from the spirit of the application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number and aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be further noted that the drawings provided in the following embodiments are only schematic illustrations of the basic concepts of the present application, and the drawings only show the components related to the present application rather than the numbers, shapes and dimensions of the components in actual implementation, and the types, the numbers and the proportions of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
It should be understood that in the present specification, the "proximal end" refers to the end near the operator during the operation, and the "distal end" refers to the end far from the operator during the operation. The term "connection of component A to component B" means that component A is directly connected in contact with component B or component A is indirectly connected to component B through another component. The terms of orientation of "upper", "lower", "inner", "outer", "side", and the like described in the exemplary embodiments of the present specification are described with respect to the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present specification.
In addition, in the following description, specific details are provided to provide a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
In recent years, the incidence of atrial fibrillation (atrial fibrillation) is increasing, and with the development of interventional medical devices and equipment, the application of cardiac interventional therapy is becoming more widespread, such as ablation surgery, wherein one important step in the surgical procedure is atrial septal puncture. Under the guidance of the imaging device, the surgical operator uses the interatrial septum puncture needle to penetrate the inner wall of the heart from the fossa ovalis, and a channel for the right atrium to enter the left atrium is established, so that the surgical operation is further prepared for the left atrium.
The existing atrial septal puncture needle is limited and fixed by the dilator in the puncture process when the stylet passes through the dilator, so that the length (or distance) of the stylet far end extending out of the dilator far end is a fixed value, an operator can hardly adjust the puncture needle in a limited space when using the puncture needle, and the needlepoint can scratch the vascular wall in the adjustment process, thereby causing unnecessary damage.
The inventor provides an interatrial puncture needle capable of adjusting the extending length of a needle point through repeated and intensive research, wherein an internal thread structure and a hollow structure are arranged in a control handle, a luer part similar to a luer male connector is matched with the internal thread structure of the control handle, the far end of the luer part is positioned in the hollow structure, an external thread matched with the internal thread structure of the control handle is arranged on the outer wall of the luer part, the luer part is movably connected with the control handle through the thread structure, so that the far end of the luer part can move back and forth in the hollow structure of the control handle, the far end of the luer part is also used for connecting the near end of a needle core, so that the needle core can be driven to move, when the luer part is rotated, the needle point at the far end of the needle core moves out of the far end of a dilator or moves back into the dilator, meanwhile, the thread structure provides the function of locking the luer part, so that the needle point stays at a position expected by an operator, the operation is convenient, and unnecessary human body injuries in the puncture process are reduced as much as possible.
The technical solutions provided by the embodiments of the present application are described below with reference to the accompanying drawings.
The interatrial septum puncture needle with the adjustable needle point extension length as shown in figure 1 comprises a puncture needle body 1 and a control handle 2, wherein the control handle 2 is connected with the near end of the puncture needle body 1. The puncture needle body 1 comprises a sheath tube (not shown in the figure), an expander 3, a needle tube 11 and a needle core 12 which are sleeved from outside to inside in sequence, namely the expander 3 is arranged in the sheath tube, the needle tube 11 is arranged in the expander 3, and the needle core 12 is arranged in the needle tube 11. The distal end of the dilator 3 is longer than the distal end of the sheath, thereby exposing the distal end of the sheath. The hub 12 is reciprocally movable within the tube 12.
As shown in fig. 3 and 4, the proximal end of the control handle 2 is threadedly coupled to the luer part 22, and the inside of the control handle 2 is provided with a hollow structure in which both the proximal end of the hub 12 and the distal end of the luer part 22 are located, and the proximal end of the hub 12 and the distal end of the luer part 22 are connected to each other. Specifically, a groove is formed in the handle body 21 of the control handle 2, the distal end of the groove is used for forming a hollow structure, the hollow structure can be provided with a smooth inner wall so as to facilitate the distal end of the luer part 22 to move inside the hollow structure, the proximal end of the groove is located at the proximal end vertex position of the handle body 21 and communicated with the outside, and an internal thread is formed in the inner wall of the proximal end of the groove. The luer part 22 is of a luer male-like structure, and the outer wall thereof is provided with an external thread 221 matching the internal thread, and the luer part 22 is movably connected to the handle body 21 by the thread structure. The portion of luer member 22 exposed from handle body 21 may be provided with a slip-resistant structure or set knob 222 (shown in fig. 4) to facilitate rotation of luer member 22 by a surgical operator.
When the luer part 22 is rotated in a first direction to move the luer part 22 in a radial direction by a first preset distance, the luer part 22 carries the needle tip 121 (shown in fig. 7) at the distal end of the stylet 12 to a first predetermined position at which the distal apex of the dilator 3 meets the first preset distance. Specifically, as shown in fig. 4 to 6, the external thread 221 is a right-handed thread, when the luer part 22 is rotated in a clockwise direction, the luer part 22 moves in a direction of the distal end of the handle body 21 in a radial direction thereof under the action of the internal thread, the stylet 12 fixed to the distal end of the luer part 22 moves, the distal end of the stylet 12 protrudes out of the needle tube 11 (as shown in fig. 2, the dilator 3 is not shown in the figure), so that the distal tip 121 of the stylet also moves, the tip 121 protrudes out of the distal end of the dilator 3 (as shown in fig. 8), and the movement distance of the tip 121 is the same as the movement distance of the luer part 22; when luer member 22 is rotated in a counterclockwise direction, luer member 22 moves in a direction radially toward the proximal end of handle body 21, thereby retracting needle tip 121 toward the proximal end of needle cannula 11, and further rotating luer member 22 is continued, so that needle tip 121 can be completely withdrawn into dilator 3 (as shown in fig. 7). It should be noted that, due to the threaded connection of the internal thread and the external thread 222, when the luer part 22 stops rotating, the needle tip 121 can stay at the position where the surgical operator wants to lift, that is, the needle tip 121 is exposed from the distal end of the dilator 3 to the length that the surgical operator wants, due to the locking effect between the internal thread and the external thread. Likewise, the external thread 221 may be a left-handed thread, in which case, when the luer part 22 is rotated in the counterclockwise direction, the needle tip 121 extends out of the distal end of the dilator 3, and when the luer part 22 is rotated in the clockwise direction, the needle tip 121 retracts into the inside of the dilator 3, and other structures and linkage manners may refer to the transseptal needle having the luer part 22 with a right-handed thread, which will not be described herein.
In the scheme, the luer part 22 is rotated to move the luer part 22, so that the needle core 12 drives the needle point 121 to move, the extending length of the needle point 121 is adjusted, and the atrial septal puncture operation in the operation is facilitated; and the needle tip 121 can stay at a preset position away from the far end of the dilator 3 through the locking of the thread structure; the needle point 121 can be retracted into the dilator by reversely rotating the luer part 22 when necessary, and the interatrial puncture needle with the structure can conveniently adjust the extending length of the needle point 121 and fix the needle point, thereby facilitating the operation, avoiding unnecessary human body injury and reducing the operation risk.
In some embodiments, as shown in fig. 4 and 5, the distal end of luer member 22 is also provided with a stop 223. As shown in fig. 5, when luer part 22 moves to the position where stopper 223 abuts against the proximal end of the hollow structure, needle tip 121 retracts to the second preset position inside dilator 3. Specifically, when the external thread 221 is a right-handed thread, the luer part 22 is rotated in the counterclockwise direction until the stopper 223 abuts against the proximal end of the hollow structure, and at this time, due to the action of the stopper 223 and the proximal end of the hollow structure, the luer part 22 cannot move in the proximal direction, and the needle tip 121 can be completely retracted into the dilator 3 by setting the length of the stylet 12.
Preferably, the apex of tip 121 is located at the distal apex of dilator 3, i.e., the apex of tip 121 is nearly or completely flush with the distal apex of dilator 3, as shown in fig. 7. By disposing the apex of the needle tip 121 at the position of the apex of the distal end of the dilator 3, this state can be set as the initial state of the interatrial septum puncture needle in which the needle tip protrusion length can be adjusted, and when the luer part 22 is rotated, the needle tip 121 can be immediately protruded out of the dilator 3, which is advantageous for improving the efficiency of the operation, and the needle tip 121 does not scrape the inner surface of the needle tube 11, and the generation of debris is avoided, thereby avoiding the introduction of foreign matter into the blood of the human body and the formation of thrombus.
In other embodiments, the apex of needle tip 121 may also be set to recede into the interior of dilator 3 a distance from the distal apex of dilator 3.
In some embodiments, as shown in fig. 4, the proximal end of luer assembly 22 is provided with a knob 222, when knob 222 abuts the distal end of control handle 2, at which time stop block 223 is located at a second preset distance from the proximal end of the hollow structure. In the above-described aspect, the maximum protruding length of the needle tip 121 may be controlled by setting the length of the second preset distance.
In some embodiments, the axis of luer member 22 coincides with the axis of hub 12. By arranging the axes of the two components to coincide, the needle core 12 obtains more stable pushing force or pulling force and can better move in the needle tube 11.
In some embodiments, the axis of the control handle 2 coincides with the axis of the luer part 22. By means of the arrangement, the Ruhr part 22 and the hollow structure can be located on the axis of the control handle 2, so that the rotation of the far end of the puncture needle body 1 can be controlled by rotating along the circumferential direction of the control handle 2, and the position of the far end of the puncture needle body can be adjusted conveniently.
In some embodiments, luer part 22 has a thread pitch of 1.0mm to 2.0mm. The distance of the rotating luer part 22 which advances or retreats along the axial direction when rotating for one circle can be conveniently set through arrangement, so that the extending and retreating distance of the needle point 121 can be conveniently and finely controlled by a surgical operator.
In some embodiments, luer member 22 is made from any one of Polycarbonate (PC), polyethylene (PE), 304 stainless steel, ABS plastic (Acrylonitrile-Butadiene-Styrene copolymer). Preferably, the control handle 2 is also manufactured using the same materials as the luer part 22.
By using the above materials, the materials themselves have appropriate coefficients of friction, which not only facilitates the adjustment of the rotating luer part 22 by the operator, but also keeps the luer part 22 staying in place
In some embodiments, dilator 3 is made using any one of Polyethylene (PE), polyether block amide (Pebax). By adopting the material, the inner wall of the expander 3 can be prevented from being scratched, and the scraps can be prevented from falling.
In some embodiments, the proximal end of the core needle 12 is bolted to the distal end of the luer member 22. By bolting the hub 12 to the luer member 22, luer members 22 of different lengths can be easily replaced, thereby allowing for easy adjustment of the maximum distance that the needle tip 121 extends beyond the dilator 3.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on differences from other embodiments. In particular, for the method embodiments described later, since they correspond to the system, the description is simple, and for the relevant points, reference may be made to the partial description of the system embodiments.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. An interatrial septum puncture needle with an adjustable needle tip extension length, comprising:
the puncture needle comprises a puncture needle body, wherein the puncture needle body comprises a sheath tube, an expander, a needle tube and a needle core which are sequentially sleeved from outside to inside, the distal end of the expander is exposed out of the distal end of the sheath tube, and the needle core can reciprocate in the needle tube;
the control handle is connected with the near end of the puncture needle main body, and the near end of the control handle is in threaded connection with a luer part;
when the luer part rotates towards the first direction to enable the luer part to move a first preset distance along the radial direction, the luer part drives the needle point at the distal end of the stylet to move to a first preset position which is far away from the vertex of the distal end of the dilator and meets the first preset distance.
2. The interatrial septum puncture needle with the adjustable needle tip extension length according to claim 1, wherein a stopper is provided at a distal end of the luer part, and when the luer part is moved to a position where the stopper abuts against a proximal end of the hollow structure, the needle tip is retracted to a second predetermined position inside the dilator.
3. The adjustable tip extension atrial septum puncture needle of claim 2, wherein the second predetermined position comprises a position in which the tip of the needle tip is located at the distal tip of the dilator.
4. The needle with the adjustable needle tip extension length of claim 2, wherein a knob is disposed at a proximal end of the luer assembly, and when the knob abuts against a distal end of the control handle, the limiting block is located at a position which is a second preset distance away from the proximal end of the hollow structure.
5. The adjustable tip extension atrial septum lancet of claim 1, wherein the axis of the luer member coincides with the axis of the hub.
6. The adjustable tip extension atrial septum introducer needle of claim 1, wherein the axis of said control handle is coincident with the axis of said luer member.
7. The atrial septum puncture needle with an adjustable needle tip extension length according to claim 1, wherein the thread pitch of the luer member is 1.0mm to 2.0mm.
8. The adjustable tip extension atrial septal puncture needle of claim 1 wherein the luer member is made of a material comprising any one of polycarbonate, polyethylene, 304 stainless steel, and ABS plastic.
9. The transseptal needle with the adjustable needle point extension length as claimed in claim 1, wherein the dilator is made of a material including any one of polyethylene and polyether block amide.
10. An adjustable tip extension atrial septal puncture needle as in claim 1 wherein the proximal end of the hub is bolted to the distal end of the luer member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211008205.5A CN115363711A (en) | 2022-08-22 | 2022-08-22 | Interatrial septum puncture needle with adjustable needle tip extension length |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211008205.5A CN115363711A (en) | 2022-08-22 | 2022-08-22 | Interatrial septum puncture needle with adjustable needle tip extension length |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115363711A true CN115363711A (en) | 2022-11-22 |
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| CN202211008205.5A Pending CN115363711A (en) | 2022-08-22 | 2022-08-22 | Interatrial septum puncture needle with adjustable needle tip extension length |
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