CN212755820U

CN212755820U - Sleeve puncture outfit and puncture needle assembly thereof

Info

Publication number: CN212755820U
Application number: CN202020453386.2U
Authority: CN
Inventors: 虞杰伟
Original assignee: Ningbo Xinwell Medical Technology Co Ltd
Current assignee: Ningbo Xinwell Medical Technology Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2021-03-23
Anticipated expiration: 2030-03-31

Abstract

A sleeve puncture outfit and a puncture needle assembly thereof are provided, wherein the puncture needle assembly comprises a rod seat and a needle rod. The needle rod is of an integrally formed structure, and compared with the existing split structure, the needle rod is simpler to manufacture and lower in cost. The needle rod has a rod cavity, the upper end of which is open, and the rod cavity has a closed side cavity wall. The side chamber walls are free of apertures and therefore there is no need for a sealing structure in the rod chamber to prevent the flow of liquid or gas into the rod chamber. The rod seat is provided with a rod seat through hole, the needle rod is fixedly connected with the rod seat, and the rod seat through hole is communicated with an opening of the needle rod and is used for inserting auxiliary tools into the rod cavity, such as an endoscope and the like, and assisting an operator in performing puncture operation.

Description

Sleeve puncture outfit and puncture needle assembly thereof

Technical Field

The application relates to the field of medical instruments, in particular to a puncture needle structure of a casing puncture outfit.

Background

In a minimally invasive medical operation of a human body, once a lesion is found in the human body, an operation or excision is required. In the operation process, firstly, a puncture outfit is needed to be applied, the puncture outfit is a surgical instrument which punctures the abdominal wall and provides a passage for other surgical instruments to enter the body cavity, and the puncture outfit belongs to a minimally invasive surgical instrument. The penetrator typically includes a cannula assembly (some also including a sheath cap assembly) as an access channel for other surgical instruments and a needle assembly extending therethrough. In operation, first, to penetrate the skin, the skin is cut open with a scalpel, and then the needle assembly is used to penetrate the skin and enter the body cavity together with the cannula assembly. The needle assembly is then withdrawn and the cannula assembly serves as a passage for introducing various instruments and tools into the abdominal cavity and for providing insufflation to elevate the abdominal wall above the organs.

But the existing puncture needle rod has a complex structure, a top plastic part and a stainless steel rod of the puncture needle have separation risk, a tool bit is easy to generate stress cracks, and the production cost is higher.

Disclosure of Invention

The application provides a puncture needle component of a novel cannula puncture outfit and a cannula puncture outfit adopting the puncture needle component.

In one embodiment, the present application provides a puncture needle assembly for a cannula puncture instrument, comprising:

the needle rod is of an integrally formed structure and is provided with a rod cavity, the upper end of the rod cavity is opened, and the rod cavity is provided with a closed side cavity wall;

and the rod seat is provided with a rod seat through hole, the needle rod is fixedly connected with the rod seat, and the rod seat through hole is communicated with the opening of the needle rod and is used for inserting an auxiliary tool into the rod cavity.

In one embodiment, the outer peripheral surface of the side cavity wall is provided with a plurality of grooves arranged along the axial direction of the rod cavity.

In one embodiment, the recess extends to the tip of the needle shaft.

In one embodiment, the depth A1 of the groove is more than 0 and less than or equal to A1 and less than or equal to 0.5 mm.

In one embodiment, the needle head of the needle rod is provided with a convex cutting edge, and the joint of the cutting edge and the outer wall of the needle head is in a round angle shape.

In one embodiment, the needle rod is provided with a rod part and a disc-shaped bottom plate, the rod part is fixedly arranged at the bottom of the disc-shaped bottom plate, and the rod cavity is arranged on the disc-shaped bottom plate in a penetrating mode and extends into the rod part; the disc-shaped base plate has an assembly structure on which the rod seat is mounted.

In one embodiment, the rod seat comprises a buckling piece and a rod seat outer cover, the buckling piece stretches over the rod cavity opening, the rod seat outer cover is fixedly installed on the disc-shaped bottom plate, the buckling piece is installed on the rod seat outer cover in a mode of moving along the axial direction of the needle rod, at least one end of the buckling piece is provided with a buckling part, the buckling part penetrates out of the disc-shaped bottom plate downwards, and the rod seat through hole is arranged in the middle of the rod seat outer cover and the buckling piece in a penetrating mode.

In one embodiment, the rod seat further comprises a self-locking clamping block, the self-locking clamping block is rotatably mounted on the disc-shaped bottom plate, and one end of the self-locking clamping block extends to the opening of the rod cavity and is used for locking an auxiliary tool inserted into the rod cavity.

In one embodiment, the needle shaft is made of plastic.

In one embodiment, a cannula puncture instrument is provided that includes a needle assembly as described in any of the above.

A needle assembly in accordance with the above-described embodiments includes a hub and a needle shaft. The needle rod is of an integrally formed structure, and compared with the existing split structure, the needle rod is simpler to manufacture and lower in cost. The needle rod has a rod cavity, the upper end of which is open, and the rod cavity has a closed side cavity wall. The side chamber walls are free of apertures and therefore there is no need for a sealing structure in the rod chamber to prevent the flow of liquid or gas into the rod chamber. The rod seat is provided with a rod seat through hole, the needle rod is fixedly connected with the rod seat, and the rod seat through hole is communicated with an opening of the needle rod and is used for inserting auxiliary tools into the rod cavity, such as an endoscope and the like, and assisting an operator in performing puncture operation.

Drawings

FIG. 1 is a schematic view of an outer configuration of an introducer needle assembly of one embodiment of the present application;

FIG. 2 is an exploded view of an introducer needle assembly as is shown in one embodiment of the present application;

FIG. 3 is a cross-sectional view of an exploded view of an introducer needle assembly as is used in one embodiment of the present application;

FIG. 4 is an exploded view of an alternate embodiment of the lancet assembly of the present application;

FIG. 5 is a side elevational view of a needle shaft portion of another embodiment of the present application;

fig. 6 is a sectional view taken along B-B in fig. 5.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

The present embodiment provides a cannula puncture instrument comprising a puncture needle assembly, for example a 5mm or 10mm gauge cannula puncture instrument. The needle assembly is removably insertable into another assembly, such as a cannula assembly or a combination of a cannula assembly and a sheath cap assembly.

Referring to fig. 1-3, in one embodiment, the needle assembly 100 includes a needle shaft 110 and a shaft mount 120.

Unlike the metal and plastic splicing structure of the prior art, the needle bar 110 is of an integrally formed structure, so that the needle bar is simpler to manufacture and lower in cost. In one embodiment, the needle shaft 110 is integrally formed of plastic, which further reduces manufacturing costs.

The needle shaft 110 has a shaft cavity 111, an upper end opening 1111 of the shaft cavity 111, and the shaft cavity 111 has a closed side cavity wall 1112. The side chamber wall 1112 has no openings and therefore no sealing structure in the rod chamber 111 is required to prevent liquid or gas from flowing into the rod chamber 111.

The shaft holder 120 has a shaft holder through hole 121, the needle shaft 110 is fixedly connected with the shaft holder 120, and the shaft holder through hole 121 communicates with an opening 1111 of the needle shaft 110 for inserting an auxiliary tool, such as an endoscope, into the shaft cavity 111 to assist an operator in performing a puncturing operation.

Referring to fig. 4 and 5, in one embodiment, the outer peripheral surface of the side chamber wall 1112 has a plurality of grooves 1113 arranged along the axial direction of the rod chamber 111, and the grooves of the grooves 1113 are not communicated with the rod chamber 111. The liquid storage space can be used for storing lubricating oil or other liquid, so that the resistance of the needle rod 110 when the needle rod 110 punctures the body is reduced, and the needle rod 110 can be inserted and pulled out more easily. Moreover, the groove 1113 is configured to guide the liquid on the needle rod 110 to slide down along the groove 1113, so as to prevent the liquid particles from being caught on the outer wall of the needle rod 110. The reservoirs can be uniformly or randomly distributed around the side chamber wall 1112.

Referring to fig. 4 and 5, in one embodiment, recess 1113 extends to the tip of needle 1114 of needle shaft 110. The depth A1 of the groove 1113 can be flexibly set according to actual requirements, in a better embodiment, the value range of the depth A1 is more than 0 and less than A1 and less than or equal to 0.5mm, the value can obtain better lubricating effect and anti-hanging liquid effect, the size of the needle rod 110 can be ensured to be in a reasonable range, and the needle rod 110 does not need to be large in size.

Further, referring to fig. 5 and 6, in one embodiment, the needle 1114 of the needle shaft 110 has a protruding blade 1115, and the blade 1115 is provided with a rounded corner 1116 at the junction with the outer wall of the needle 1114. The rounded corners 1116 are designed to assist in the fall-off of liquid particles that may become caught on the needle 1114 and blade 1115.

Further, referring to fig. 1 to 3, in one embodiment, the needle shaft 110 has a shaft portion 112 and a fitting portion 113. The rod portion 112 is fixedly disposed at the bottom of the fitting portion 113. The stem cavity 111 is disposed through the fitting portion 113 and extends into the stem portion 112.

The fitting portion 113 has a fitting structure on which the rod seat 120 is mounted. The assembly of the two can be clamping, tight fit, screw joint or other fixing modes. Generally, the shank holder 120 and the needle shank 110 are detachably assembled to each other, so that they can be easily removed and replaced. Of course, in some embodiments, non-removable fixing between the shaft holder 120 and the needle shaft 110 may be adopted, such as non-removable gluing or welding.

Specifically, referring to fig. 1 to 3, in one embodiment, the mounting portion 113 has a plate-shaped bottom plate 1131, the rod portion 112 is fixedly disposed at the bottom of the plate-shaped bottom plate 1131, and the mounting structure is disposed on the plate-shaped bottom plate 1131. The plate-shaped bottom plate 1131 is horizontally placed, and the rod 112 is fixed below the plate-shaped bottom plate 1131.

With continued reference to fig. 1-3, in one embodiment, the rod base 120 includes a rod base cover 122 and a fastener 123. The catch 123 spans over the opening 1111 of the rod cavity 111. The rod seat outer cover 122 is fixedly installed on the disc-shaped bottom plate 1131, and the rod seat through hole 121 is arranged in the middle of the rod seat outer cover 122 and the fastener 123 in a penetrating manner. The rod seat outer cover 122 and the middle part of the fastener 123 are both provided with through

holes

1221 and 1231, and the two through

holes

1221 and 1231 are aligned to form a rod seat through hole 121. The rod seat through-hole 121 is aligned with the opening 1111 of the rod cavity 111 to facilitate insertion of an auxiliary tool from the rod seat 120 into the rod cavity 111.

The latch 123 and the rod base outer cover 122 are fixed together, and the two can be realized by tight fit or other methods. In one embodiment, the rod seat outer cover 122 has oppositely disposed notches 1222, and the two ends of the latch 123 are respectively embedded in the corresponding notches 1222. The latch 123 is generally in the shape of an inverted U that is mounted in a bridge configuration on the disc-shaped base 1131. The two ends of the fastener 123 can be provided with a plurality of concave-convex structures 1232 for increasing the friction effect and making the operator hold more stably.

The locking member 123 is mounted on the rod base outer cover 122 in a manner of being capable of moving along the axial direction of the needle bar 110, for example, the hole wall of the through hole of the rod base outer cover 122 extends downwards to form a hollow cylinder 1223, and the locking member 123 can be sleeved on the cylinder 1223 and can move up and down along the cylinder 1223. The upper end of the disk-shaped base 1131 may abut the post 1223. At least one end of the locking member 123 has a locking portion 1233, the disc-shaped bottom plate 1131 has an opening 1132 corresponding to the locking portion 1233, and the locking portion 1233 penetrates through the disc-shaped bottom plate 1131. The latch 1233 is used to connect to a sheath cap assembly or a cannula assembly to secure the needle assembly 100 to a corresponding sheath assembly or cannula assembly.

Referring to fig. 2 and 3, in one embodiment, the plate-shaped base plate 1131 may have at least one mounting post 1134 thereon, and the mounting post 1134 is tightly fitted into the mounting post hole 1223 of the rod base outer cover 122 for fixing. Of course, in other embodiments, other fixing manners may be adopted to realize the fixing.

Further, referring to fig. 1 to 3, in an embodiment, the rod seat 120 further includes a self-locking latch 124. Self-locking latch 124 is pivotally mounted to disk-shaped base 1131, and one end of self-locking latch 124 extends into opening 1111 of shaft cavity 111 for locking an auxiliary tool inserted into shaft cavity 111. When the auxiliary tool is inserted, one end of the self-locking fixture block 124 is driven to turn downwards until the auxiliary tool is turned to the self-locking position, and the auxiliary tool is locked. When the unlocking is needed, the auxiliary tool can be released by manually pressing the self-locking clamping block 124.

Specifically, referring to fig. 2, in one embodiment, the tray-shaped bottom plate 1131 has two opposite slots 1133, and the slots 1133 are opened upward. The self-locking clamping block 124 has a rotating shaft portion 1241 at both ends, and the rotating shaft portion 1241 is rotatably mounted in the clamping groove 1133.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims

1. A puncture needle assembly for a cannula puncture instrument, comprising:

2. The needle assembly of claim 1 wherein the outer peripheral surface of the sidewall has a plurality of axially disposed grooves along the shaft lumen.

3. The needle assembly of claim 2 wherein said recess extends to the tip of the needle shaft.

4. The needle assembly of claim 2 wherein the depth a1 of the recess ranges from 0 < a1 ≤ 0.5 mm.

5. The needle assembly of claim 1 wherein the needle tip of said needle shaft has a raised blade edge, said blade edge being radiused to the outer wall of the needle tip.

6. The needle assembly of claim 1 wherein said needle shaft has a shaft portion and a disk-shaped floor, said shaft portion being fixedly disposed at the bottom of the disk-shaped floor, said shaft chamber being disposed through said disk-shaped floor and extending into the shaft portion; the disc-shaped base plate has an assembly structure on which the rod seat is mounted.

7. The needle assembly of claim 6 wherein said hub includes a latch spanning above said opening in said shaft chamber and a hub cover fixedly mounted to said disc-shaped base, said latch being mounted to said hub cover in axially movable relation along said needle shaft, said latch having a latch portion at least one end thereof, said latch portion extending downwardly through said disc-shaped base, said hub through-hole being disposed intermediate said hub cover and said latch.

8. The lancet assembly of claim 7, wherein the hub further comprises a self-locking latch rotatably mounted to the disk-shaped base plate, wherein one end of the self-locking latch extends toward the opening of the shaft cavity for locking an auxiliary tool inserted into the shaft cavity.

9. The needle assembly of claim 1 wherein said needle shaft is formed of plastic.

10. A cannula puncture device comprising a puncture needle assembly according to any of claims 1 to 9.