CN113796937A - Puncture trocar assembly and puncture device - Google Patents
Puncture trocar assembly and puncture device Download PDFInfo
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- CN113796937A CN113796937A CN202111372200.6A CN202111372200A CN113796937A CN 113796937 A CN113796937 A CN 113796937A CN 202111372200 A CN202111372200 A CN 202111372200A CN 113796937 A CN113796937 A CN 113796937A
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- contact surface
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- coaxial sleeve
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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
- A61B2017/3454—Details of tips
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Abstract
The invention relates to the technical field of medical puncture equipment, and discloses a puncture trocar assembly and a puncture device. The puncture trocar subassembly includes: the coaxial sleeve and the needle core are in sliding connection with each other; the head end of the coaxial sleeve comprises an axial contact surface which is used for puncture contact with a focus along the axial direction of the coaxial sleeve and a lateral contact surface which encloses to form the axial contact surface; the axial contact surface comprises a plurality of first contact surfaces and a plurality of second contact surfaces which are arranged at intervals so as to form a height difference gap which can enable tissue fluid flowing out of a lesion to enter the coaxial sleeve; the tail end of the coaxial sleeve is used for connecting with an injector; the first contact surface is a convex surface extending outward in the axial direction of the stylet. The invention solves the technical problems that the head end of the coaxial cannula puncture needle is too sharp to facilitate the puncture and the absorption of tissue fluid, and simultaneously the peripheral tissue is easy to puncture, and the head end of the coaxial cannula puncture needle is too flat and can protect the peripheral tissue, so that the puncture and extraction efficiency cannot be improved.
Description
Technical Field
The invention relates to the technical field of medical puncture equipment, in particular to a puncture trocar assembly and a puncture device.
Background
The coaxial cannula pjncture needle is used for pleuroperitoneal cavity, pericardial cavity hydrops, the puncture suction of hematocele, puts a tub drainage, the alcohol sclerosis of cyst, the suction of abscess, put tub drainage, the puncture of biliary system obstruction is put tub drainage, the puncture of urinary system obstruction is put tub drainage etc. based on the demand of puncture and the protection to patient's tissue organ, the coaxial cannula pjncture needle need can puncture the back and carry out the drawing liquid operation, avoids puncturing surrounding tissue, and the resistance when drawing liquid simultaneously is the better the less.
At present, coaxial cannula puncture needles in the market can be roughly classified into an inclined plane type, a flat head type and a three-point type according to the arrangement of the head end of the coaxial cannula puncture needle; inclined plane type head end one side is most advanced and most advanced sharp, and the tissue is punctured easily to inclined plane type head end during the puncture, utilizes the drawing liquid operation that the opening between inclined plane and the tissue inner wall can be smooth and easy during the drawing liquid, but because most advanced sharp, punctures tissue on every side easily when the head carries out angle or degree of depth regulation. The terminal surface of the head end of flush type head end is flat, nevertheless gets into to organize easy back and organize the inner wall counterbalance to make the head end inside be vacuum state almost, lead to unable extraction peripheral hydrops, the extraction hydrops efficiency is very low. The end face of the three-pointed head end comprises three points, and is similar to the inclined-plane head end, so that the three-pointed head end can easily penetrate into tissues, but can easily penetrate through surrounding tissues when the position of the head end is adjusted during liquid pumping operation.
The problem that the head end of a coaxial cannula puncture needle is too flat to protect surrounding tissues and cannot improve puncture extraction efficiency is solved by setting the head end of the coaxial cannula puncture needle to be too sharp to easily puncture and absorb tissue fluid and easily puncture surrounding tissues caused by the fact that the head end of the coaxial cannula puncture needle is too flat in the related art.
Disclosure of Invention
The invention mainly aims to provide a puncture trocar component and a puncture device, and aims to solve the technical problems that in the related art, the head end of a coaxial trocar puncture needle is too sharp to facilitate puncture and suction of tissue fluid, surrounding tissues are easy to puncture, and the head end of the coaxial trocar puncture needle is too flush to protect the surrounding tissues, so that the puncture extraction efficiency cannot be improved.
To achieve the foregoing objective, in a first aspect, the present invention provides an introducer needle assembly.
The penetrating trocar assembly comprises: the needle comprises a needle core and a coaxial sleeve sleeved on the needle core, wherein the needle core is connected with the coaxial sleeve in a sliding manner; the head end of the coaxial sleeve comprises an axial contact surface which is used for puncture contact with a focus along the axial direction of the coaxial sleeve and a lateral contact surface which encloses to form the axial contact surface; the axial contact surface comprises a first contact surface and a second contact surface, and a plurality of the first contact surfaces and a plurality of the second contact surfaces are arranged at intervals to form a height difference gap which enables interstitial fluid flowing out of the lesion to enter the coaxial sleeve; the tail end of the coaxial sleeve is used for being connected with an injector; the first contact surface is a convex surface extending outward in the axial direction of the stylet.
The puncture trocar component provided by the invention utilizes the axial contact surfaces of the first contact surface and the second contact surface which are contacted with the focus to contact the tissue at the focus of a patient, adopts the contact surfaces to contact the tissue at the focus of the patient instead of the contact surfaces, thereby avoiding further puncture damage of the coaxial cannula to the tissue in the subsequent tissue fluid suction process, simultaneously utilizes the interval arrangement of the first contact surfaces and the second contact surfaces to form a height difference gap which can lead the tissue fluid flowing out of the focus to enter the coaxial cannula, effectively avoiding that the head end of the coaxial cannula is propped against the tissue at the focus of the patient to form a nearly vacuum state in the tissue fluid suction process by utilizing the coaxial cannula, thereby influencing the tissue fluid suction, further solving the problem that the head end of the coaxial cannula is provided with a sharp puncture needle to facilitate the puncture to suck the tissue fluid, meanwhile, the peripheral tissue is easy to puncture, and the head end of the coaxial cannula puncture needle is too flush and can protect the peripheral tissue, so that the puncture extraction efficiency cannot be improved.
Preferably, the lateral contact surface is provided with a through hole at a position close to the axial contact surface, and the tissue fluid can enter the coaxial sleeve.
Preferably, the through hole is provided on a lateral contact surface between the first contact surface and the second contact surface.
Preferably, the axial contact surface is an arc surface in a wave shape.
Preferably, the convex surface is an arc-shaped surface; and/or the head end of the coaxial sleeve is gradually reduced along the axial outward cross-sectional area of the needle core.
Preferably, the first contact surface and the second contact surface are planar; and/or the length of the first contact surface in the circumferential direction of the coaxial sleeve is not less than that of the second contact surface in the circumferential direction of the coaxial sleeve.
Preferably, the core comprises a piercing end, a holding end and a needle hole for extracting the tissue fluid, and the holding end can be used for connecting with a syringe.
Preferably, a sealing structure is arranged between the holding end of the needle core and the tail end of the coaxial sleeve.
Preferably, the sealing means is a septum arranged between the gripping end of the stylet and the trailing end of the coaxial sleeve, such that the stylet and the coaxial sleeve remain connected hermetically in the sliding connection.
In a second aspect, the present invention also provides a puncturing device;
the puncture device comprises an injector and the puncture trocar assembly of any one of the above, wherein the holding end of the needle core of the puncture trocar assembly and/or the tail end of the coaxial sleeve are connected with the injector.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention and to enable other features, objects and advantages of the invention to be more fully apparent. The drawings and their description illustrate the invention by way of example and are not intended to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a puncture trocar assembly provided in accordance with an embodiment of the present invention;
FIG. 2 is a schematic structural view of another puncture trocar assembly provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic axial cross-sectional view of the hub of FIG. 2 in a puncturing position;
fig. 4 is a schematic axial sectional view of the hub of fig. 2 in a coaxial cannula.
Reference numerals
1. A needle core; 101. a holding end; 2. a coaxial bushing; 201. a tail end; 3. an axial contact surface; 301. a first contact surface; 302. a second contact surface; 4. a lateral contact surface; 401. a through hole; 5. a diaphragm.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present invention, the terms "upper", "inner", "outer", "center", "axial" and "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.
In addition, the term "plurality" shall mean two as well as more than two.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 4, the present invention provides a puncture trocar assembly, which comprises a trocar core 1 and a coaxial cannula 2 sleeved on the trocar core 1, wherein the trocar core 1 is slidably connected with the coaxial cannula 2, and the head end of the coaxial cannula 2 comprises an axial contact surface 3 along the axial direction of the coaxial cannula 2 for making puncture contact with the lesion and a lateral contact surface 4 enclosing to form the axial contact surface 3. The axial contact surface 3 comprises a first contact surface 301 and a second contact surface 302, the plurality of first contact surfaces 301 and the plurality of second contact surfaces 302 are arranged at intervals to form a height difference gap which enables interstitial fluid flowing out of a lesion to enter the coaxial sleeve 2, and the tail end of the coaxial sleeve 2 is used for being connected with an injector; the first contact surface 301 is a convex surface extending outward in the axial direction of the core 1. The area of the convex surface of the first contact surface 301 is larger than the area of the second contact surface 302, and further preferably, the area of the concave surface of the second contact surface 302 extends inward in the axial direction of the hub 1. Wherein the contact area of the first contact surface and the second contact surface with the lesion of the patient is related by the sleeve wall thickness and the radial circumference of the coaxial sleeve 2. Wherein the thickness of the coaxial trocar can refer to the thickness of the current conventional puncture needle cannula, and the distance between the first contact surface 301 and the second contact surface 302 can be 1-2 mm.
The puncture trocar component provided by the invention utilizes the axial contact surfaces of the first contact surface and the second contact surface which are contacted with the focus to contact the tissue at the focus of a patient, adopts the contact surfaces to contact the tissue at the focus of the patient instead of the contact surfaces, thereby avoiding further puncture damage of the coaxial cannula to the tissue in the subsequent tissue fluid suction process, simultaneously utilizes the interval arrangement of the first contact surfaces and the second contact surfaces to form a height difference gap which can lead the tissue fluid flowing out of the focus to enter the coaxial cannula, effectively avoiding that the head end of the coaxial cannula is propped against the tissue at the focus of the patient to form a nearly vacuum state in the tissue fluid suction process by utilizing the coaxial cannula, thereby influencing the tissue fluid suction, further solving the problem that the head end of the coaxial cannula is provided with a sharp puncture needle to facilitate the puncture to suck the tissue fluid, meanwhile, the peripheral tissue is easy to puncture, and the head end of the coaxial cannula puncture needle is too flush and can protect the peripheral tissue, so that the puncture extraction efficiency cannot be improved.
In an alternative embodiment of the invention, the lateral contact surface 4 is provided with a through-hole 401 near the axial contact surface 3, through which tissue fluid can enter the coaxial sleeve 2. The arrangement of the through hole 401 increases the flow of the tissue fluid to the coaxial sleeve 2 in unit time, and avoids the situation that the head end of the coaxial sleeve 2 is abutted to the focus to cause the tissue fluid not to be sucked out easily. In a further alternative embodiment of the present invention, the through hole 401 is disposed on the lateral contact surface 4 between the first contact surface 301 and the second contact surface 302, which is beneficial for tissue fluid to flow into the coaxial sleeve from the height difference gap, and prevents the tissue at the lesion from being adsorbed in the height difference gap and forming vacuum with the tissue at the lesion during the suction process, so that the tissue fluid at the lesion is not easy to separate out and the suction condition occurs. In a further alternative embodiment of the invention, there are a plurality of through holes 401, and a plurality of through holes 401 are evenly distributed on the lateral contact surface 4 of the head end of the coax sleeve 2 in the radial direction of the coax sleeve 2. The diameter of the through hole 401 is about 1.0mm, and can be specifically adjusted according to the aperture of the puncture needle.
In an alternative embodiment of the present invention, the convex surface of the first contact surface 301 may be a wall-shaped convex surface, or may be an arc surface, and further preferably, the first contact surface 301 and the arc surface extending to the outside of the axial direction of the coaxial sleeve 2 are provided in an arc surface, so as to avoid the situation that the axial contact surface 3 is too sharp to puncture the tissue at the lesion during the suction process, and at the same time, the coaxial sleeve 2 is not affected to be attached to the tissue at the lesion of the patient, so as to facilitate the suction of the tissue fluid. At this time, the second contact surface 302 may be a straight surface, or may be an arc surface protruding inward or outward in the axial direction. The second contact surface 302 may be small enough that the second contact surface 302 does not contact the tissue at the lesion during aspiration of the trocar assembly. In a further alternative embodiment of the invention, the second contact surface 302 is an arc-shaped surface protruding inwards in the axial direction, and the second contact surface 302 and the first contact surface 301 together enclose the axial contact surface 3 which is an arc-shaped surface in a wave shape. Therefore, the height difference gap for enabling tissue fluid to enter the coaxial sleeve 2 is formed in the situation that the axial contact surface 3 is in contact with and sucks tissue at a focus, and the situation that secondary damage to the tissue is caused due to the fact that the axial contact surface 3 is in contact with the tissue at the focus can be guaranteed. In an alternative embodiment of the present invention, the first contact surface 301 and the second contact surface 302 form a wave-shaped structure with 3-5 groups, and the height difference between the first contact surface 301 and the second contact surface 302 is 1-2 mm.
In another alternative embodiment of the present invention, the first contact surface 301 and the second contact surface 302 are both flat surfaces, the first contact surface 301 and the second contact surface 302 are connected by a vertical connecting line parallel to the axial direction to form a "city wall" shaped recess and protrusion, and the size of the height difference gap formed by the first contact surface 301 and the second contact surface 302 can be adjusted according to actual needs to form different specifications for different operation requirements. In other embodiments of the present invention, the first contact surface 301 and the second contact surface 302, which are arranged in a plane, may be connected through an arc surface and an inclined surface, so as to ensure that a height difference gap is formed to satisfy the time effect of tissue fluid aspiration, and at the same time, to improve the contact area between the head end of the coaxial cannula 2 of the puncture cannula needle assembly and the tissue at the lesion site, so that when the coaxial cannula needs to adjust the angle and depth, it is not easy to puncture the surrounding tissue, and to avoid secondary puncture and damage during aspiration. In a further alternative embodiment of the present invention, the length of the first contact surface 301 in the circumferential direction of the coaxial sleeve is not smaller than the length of the second contact surface 302 in the circumferential direction of the coaxial sleeve, so that the contact area of the tip end of the coaxial sleeve 2 of the puncture needle with the tissue at the lesion can be further increased.
In an alternative embodiment of the present invention, the cross-sectional area of the coaxial sleeve 2 along the axial direction of the needle core 1 is gradually reduced, i.e. the end port of the coaxial sleeve 2 is in an inward-shrinking shape, so as to facilitate the contact of the coaxial sleeve 2 to the lesion of the patient to be more gradual.
In an alternative embodiment of the present invention, the core 1 is provided in a solid structure, and the core 1 includes a piercing end and a holding end 101. In the actual operation process, the puncture end sleeved on the solid needle core 1 in the coaxial sleeve 2 punctures the tissue at the focus of a patient, the puncture sleeve needle assembly enters a preset position, the visible tissue fluid is sucked into the injector at the tail end, the needle core 1 is fixed at the moment, the coaxial sleeve 2 is pushed inwards to exceed the needle core 1, the head end of the coaxial sleeve 2 is designed to prevent the puncture of the wall of a focus and the surrounding tissue, and the fluid circulation can also be ensured. The solid needle core 1 is drawn out of the focus by pulling the holding end 101, and is pressed against the punctured tissue by the coaxial sleeve 2 retained at the focus of the patient to suck the tissue fluid.
In another alternative embodiment of the present invention, the core 1 comprises a piercing end, a holding end 101 and a needle hole for extracting tissue fluid, and the holding end 101 can be used for connecting with a syringe. In the actual operation process, the puncture needle enters a preset position, the puncture end of the needle core 1 sleeved on the coaxial sleeve 2 punctures the focus of a patient, so that tissue fluid is seen to be sucked into the injector at the tail end 201, the needle core 1 is fixed at the moment, the coaxial sleeve 2 is pushed inwards to exceed the needle core 1, the puncture end of the needle core 1 is positioned in the coaxial sleeve 2, the coaxial sleeve 2 is pressed against the tissue of the punctured focus, meanwhile, the holding part of the needle core 1 is connected with the injector and slight negative pressure suction is maintained, and therefore when the puncture end of the needle core 1 enters the focus, the tissue fluid is easy to be sucked out. In other embodiments of the present invention, the tail end 201 of the coaxial sleeve 2 and the grip portion of the stylet 1 are connected to the injector at the same time, specifically, the tail end 201 of the coaxial sleeve 2 is connected to the injector, and the grip portion of the stylet 1 is wrapped in the connection structure of the tail end 201 of the coaxial sleeve 2 and the injector. If a drainage catheter needs to be placed, a multifunctional puncture trocar component with a thicker model can be selected, the trocar core 1 is completely pulled out after puncture is completed, and the drainage catheter is inserted along the cavity gap of the coaxial cannula 2.
In order to facilitate the operation of the holding part of the stylet 1 and ensure the tightness and stability of the structural connection of the holding part of the stylet 1, the tail end 201 of the coaxial sleeve 2 and the injector, in an alternative embodiment of the invention, the holding part of the stylet 1 is connected with the connection port of the injector, and a sealing structure is arranged between the holding end 101 of the stylet 1 and the tail end 201 of the coaxial sleeve 2, in a further alternative embodiment of the invention, the sealing structure is a diaphragm 5 arranged at the tail end 201 of the coaxial sleeve 2 to prevent liquid from flowing out through the gap between the stylet 1 and the coaxial sleeve 2 after the coaxial sleeve 2 is pushed forward and air leakage when the injector extracts the liquid. In another further alternative embodiment of the invention, the sealing structure may be a grip and an elastic sleeve enclosing the core 1, so that the core 1 and the coaxial sleeve 2 remain connected hermetically in the sliding connection.
The invention provides a puncture device comprising a syringe and a puncture cannula assembly as described in any of the above, wherein the holding end 101 of the needle hub 1 and/or the tail end 201 of the coaxial cannula 2 of the puncture cannula assembly is connected to the syringe.
The above description is only a preferred or alternative embodiment of the present invention and is not intended to limit the present invention, and various modifications and variations of the present invention may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A trocar assembly, wherein the trocar assembly comprises: the needle comprises a needle core (1) and a coaxial sleeve (2) sleeved on the needle core (1), wherein the needle core (1) is connected with the coaxial sleeve (2) in a sliding manner; the head end of the coaxial sleeve (2) comprises an axial contact surface (3) which is used for being in puncture contact with a focus along the axial direction of the coaxial sleeve (2), and a lateral contact surface (4) which encloses to form the axial contact surface (3); the axial contact surface (3) comprises a first contact surface (301) and a second contact surface (302), and a plurality of the first contact surfaces (301) and a plurality of the second contact surfaces (302) are arranged at intervals to form a height difference gap which enables interstitial fluid flowing out of the lesion to enter the coaxial sleeve (2); the tail end (201) of the coaxial sleeve (2) is used for being connected with an injector; the first contact surface (301) is a convex surface extending outward in the axial direction of the stylet (1).
2. A puncture trocar assembly according to claim 1, characterized in that the lateral contact surface (4) is provided with a through hole (401) at a location close to the axial contact surface (3) for enabling the tissue fluid to enter the coaxial cannula (2).
3. The puncture trocar assembly according to claim 2, characterized in that the through hole (401) is provided on a lateral contact surface (4) between the first contact surface (301) and the second contact surface (302).
4. A puncture trocar assembly according to claim 3, characterized in that the axial contact surface (3) is an arc-shaped surface with a wave shape.
5. The puncture trocar assembly of claim 1 wherein the convex surface is an arcuate surface; and/or the head end of the coaxial sleeve (2) is gradually reduced along the axial outward cross-sectional area of the stylet (1).
6. The trocar assembly of claim 1 wherein said first contact surface (301) and said second contact surface (302) are planar; and/or the length of the first contact surface (301) in the circumferential direction of the coaxial sleeve is not less than the length of the second contact surface (302) in the circumferential direction of the coaxial sleeve.
7. A puncture trocar assembly according to claim 1, characterized in that the needle core (1) comprises a piercing end, a gripping end (101) and a needle hole for extracting the tissue fluid, the gripping end (101) being adapted for connection to a syringe.
8. The trocar assembly according to claim 7 wherein a sealing arrangement is provided between the gripping end (101) of the hub (1) and the trailing end (201) of the coaxial cannula (2).
9. The trocar assembly according to claim 8 wherein said sealing means is a septum (5) arranged between the grip end (101) of the hub (1) and the trailing end (201) of the coaxial cannula (2) so that the hub (1) and the coaxial cannula (2) remain connected hermetically in a sliding connection.
10. A puncture device, characterized in that it comprises a syringe and a puncture cannula assembly according to any one of claims 1 to 9, the holding end (101) of the hub (1) and/or the trailing end (201) of the coaxial cannula (2) of which is connected to the syringe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111372200.6A CN113796937A (en) | 2021-11-19 | 2021-11-19 | Puncture trocar assembly and puncture device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111372200.6A CN113796937A (en) | 2021-11-19 | 2021-11-19 | Puncture trocar assembly and puncture device |
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| CN113796937A true CN113796937A (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111372200.6A Pending CN113796937A (en) | 2021-11-19 | 2021-11-19 | Puncture trocar assembly and puncture device |
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Cited By (1)
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| CN113952009A (en) * | 2021-12-23 | 2022-01-21 | 真健康（北京）医疗科技有限公司 | Targeted drug delivery needle clamping navigation device and targeted drug delivery treatment system |
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