CN109984818B

CN109984818B - Coreless puncture outfit

Info

Publication number: CN109984818B
Application number: CN201711499519.9A
Authority: CN
Inventors: 孙宝峰; 马猛
Original assignee: Fengh Medical Co ltd
Current assignee: Fengh Medical Co ltd
Priority date: 2017-12-31
Filing date: 2017-12-31
Publication date: 2021-12-31
Anticipated expiration: 2037-12-31
Also published as: CN109984818A

Abstract

The invention discloses a coreless puncture outfit which comprises a cannula assembly and a puncture body assembly, wherein the puncture body assembly comprises a puncture sheet and a protective shell, the puncture sheet comprises a puncture tip, the puncture sheet is fixedly arranged on the cannula assembly, the protective shell is in sliding connection with the cannula assembly, and the puncture tip can be selectively exposed from the bottom of the protective shell. The coreless puncture outfit is convenient to use, not only saves the preparation cost of the whole puncture outfit, but also saves the packaging cost of the puncture outfit, and simultaneously, the design of the puncture body assembly also integrally improves the operation safety of the coreless puncture outfit.

Description

Coreless puncture outfit

Technical Field

The invention relates to a surgical instrument, in particular to a coreless puncture outfit, belonging to the field of medical equipment.

Background

The puncture outfit is used as an indispensable surgical instrument in various minimally invasive surgeries, and has a very large using amount. The traditional puncture outfit comprises a puncture core bar, a puncture sleeve and a sealing component, wherein the puncture sleeve and the sealing component jointly form a channel for the puncture core bar, other surgical instruments and the abdominal cavity of a patient to be inflated; the sealing assembly is arranged in the puncture sleeve and used for avoiding gas injected into the abdominal cavity from leaking out and ensuring stable pneumoperitoneum so as to carry out the operation normally, and the puncture core rod is inserted into the puncture sleeve through the sealing assembly and used for realizing puncture on the abdominal cavity of a patient and driving one end of the puncture sleeve to enter the abdominal cavity of the patient.

In the specific operation process, a doctor generally firstly cuts a small incision on the abdomen of a patient, then aligns the top of the puncture core rod with the small incision to reciprocate and move downwards, and drives one end of the puncture sleeve to enter the abdominal cavity of the patient. After the puncture is finished, the puncture core bar is pulled out of the puncture sleeve, and other procedural instruments can enter and exit from a channel formed by the puncture sleeve.

Due to the existence of the puncture core rod, the manufacturing, packing and transportation costs of the puncture device are increased, the puncture core rod is easy to damage the viscera, and the puncture core rod is discarded after being used, thereby causing waste.

Based on the above situation, on the basis of ensuring the puncture performance of the puncture outfit, the main improvement direction of the existing puncture outfit is to simplify the structure, reduce the cost and improve the performance.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a coreless puncture outfit, which solves the problems that the puncture outfit in the prior art is high in manufacturing cost and packaging cost and has certain potential safety hazard in puncture operation.

The invention is realized by the following technical scheme: the utility model provides a centreless puncture ware, includes sleeve assembly and puncture body subassembly, puncture body subassembly includes puncture piece and protective housing, the puncture piece includes puncture point, puncture piece is fixed to be set up on the sleeve assembly, the protective housing with sleeve assembly is sliding connection, puncture point optionally follows the bottom of protective housing exposes.

Preferably, the sleeve assembly comprises a first end and a second end, the first end of the sleeve assembly is selectively sealed by the sealing assembly, the second end of the sleeve assembly is radially divided into a first side and a second side, the bottom of the second side is higher than that of the first side, a limiting part is formed on the first side, and the puncture body assembly is arranged in the limiting part.

Preferably, the bottom of the limiting part protrudes from the end surface of the second end of the sleeve assembly.

Preferably, the limiting part and the bottom end face of the second end of the sleeve assembly are both cambered surfaces or inclined surfaces.

Preferably, the limiting part is formed by extending a part of the pipe wall of the sleeve assembly downwards, and the wall thickness of the limiting part is smaller than that of the rest part of the sleeve assembly.

Preferably, a plurality of protruding blocks are arranged on the limiting part to divide the limiting part into a fixing groove and a sliding groove, and the fixing groove and the sliding groove both extend downwards.

Preferably, the fixing groove is used for accommodating the puncture sheet, the two sliding grooves are respectively located at two sides of the fixing groove, and the sliding grooves are used for accommodating two sides of the protective shell.

Preferably, the limiting part is further provided with two accommodating grooves, the two accommodating grooves are respectively located between the fixing groove and the two sliding grooves, and the accommodating grooves extend downwards.

Preferably, two bosses are formed on the inner wall of the protective shell, and the two bosses are embedded into the accommodating grooves and respectively aligned with the top surfaces of the two accommodating grooves in the axial direction of the sleeve assembly.

Preferably, an elastic piece is clamped between the boss and the top surface of the corresponding accommodating groove.

Preferably, a first sliding groove is formed in the puncture sheet, the first sliding groove extends along the axial direction of the sleeve assembly, a sliding block is arranged on the inner wall of the protective shell, and the sliding block is embedded into the first sliding groove.

Preferably, the limiting portion is provided with a second sliding groove corresponding to the first sliding groove on the puncture sheet, and the sliding block on the protective shell is embedded into the first sliding groove and the second sliding groove at the same time.

Compared with the prior art, the invention has the beneficial effects that: the coreless puncture outfit sleeve assembly is not provided with a puncture core bar any more, but is provided with a puncture body assembly on the pipe wall at one side of the sleeve assembly, when the puncture body assembly is in an initial state, the protective shell covers the puncture tip of the puncture sheet, and when the puncture body assembly is in a puncture operation state, the protective shell slides towards the direction far away from the puncture tip and does not cover the puncture tip of the puncture sheet any more. After the puncture body assembly realizes puncture, surgical instruments such as an anastomat and the like can directly enter through an internal channel formed by the sleeve assembly, and the use is convenient. The design of the puncture body assembly not only saves the preparation cost of the whole puncture device, but also saves the packaging cost of the whole puncture device because the puncture body assembly does not influence the sealing assembly and does not need to be packaged after being disassembled from the cannula assembly. In addition, the protective shell in the puncture body assembly can slide towards the puncture tip to enable the puncture body assembly to be in an initial state when puncture is completed, and the protective shell covers the puncture tip of the puncture piece again, so that inertia of the puncture tip downwards or rotation of the puncture device in the operation process to hurt visceral organs in the abdominal cavity of a patient can be avoided when puncture is completed.

Drawings

FIG. 1 is a schematic view of a coreless puncture instrument according to an embodiment of the present invention;

FIG. 2 is a schematic view of the second end of the coreless puncture instrument in an initial state according to the embodiment of the present invention;

FIG. 3 is a schematic structural view of the lancet assembly in a puncturing state according to an embodiment of the invention;

FIG. 4 is a schematic structural view of the lancet assembly in an initial state according to an embodiment of the present invention;

FIG. 5 is an exploded view of the piercing body assembly of FIG. 3 or FIG. 4;

fig. 6 is a schematic structural view of a limiting portion of a sleeve assembly according to an embodiment of the invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

As shown in FIGS. 1 and 2, the present embodiment provides a coreless puncture instrument, which includes a cannula assembly 1, a sealing assembly and a puncture body assembly 2, wherein the cannula assembly 1 defines a lumen (i.e., a passage for a medical instrument during a surgical procedure) including a first end (not shown) and a second end 12, and the first end (not shown) of the cannula assembly 1 is an upper port of the cannula assembly 1, and particularly, a connection portion of the cannula assembly 1 and the sealing assembly 2. The first end of the tube assembly 1 is selectively sealed by the sealing assembly, and the structure of the sealing assembly and the connection manner of the sealing assembly and the tube assembly 1 are described in the patent application documents previously filed by the applicant, including CN201710216813.8, CN201710216814.2, and CN201710299930.5, and are not described herein again. The second end 12 of the cannula assembly 1 is provided with a piercing body assembly 2. the piercing body assembly 2 may be adapted for use with any cannula assembly 1 of any size.

As shown in fig. 3 to 5, the puncture body assembly 2 in the present embodiment includes a puncture sheet 21 and a protective case 22.

As shown in fig. 4, the puncturing sheet 21 includes a puncturing tip 211, and a first sliding slot 212 extending in a longitudinal direction is formed on the puncturing sheet 21. The inner wall of the protective shell 22 is provided with a sliding block 221, the sliding block 221 is partially embedded into the first sliding groove 212, and the sliding block 221 slides along the first sliding groove 212 to drive the protective shell 22 to move longitudinally relative to the puncture sheet 21. The width of the bottom of the sliding block 221 is larger than that of the first sliding groove 212 to prevent the protective shell 22 from being separated from the puncturing blade 21. Two bosses 222 are formed on the inner wall of the protective casing 22 for sliding connection with the cannula assembly 1.

The second end 12 of the cannula assembly 1 is divided into a first side 121 and a second side 122 along the radial direction, as shown in fig. 6, the first side 121 of the cannula assembly 1 forms the position-limiting portion 13 of the puncture body assembly 2, and the puncture sheet 21 and the protective shell 22 are correspondingly disposed in the position-limiting portion 13 of the first side 121 of the cannula assembly 1. The bottom of the position-limiting portion 13 protrudes from the end surface of the second end 12 of the sleeve assembly 1, so that the sleeve assembly 1 is integrally formed in a manner that the second side 122 is higher and the first side 121 is lower, where the term "high" and "low" means that the distance from the bottom of the second side 122 of the sleeve assembly 1 to the first end of the sleeve assembly 1 is smaller than the distance from the bottom of the first side 121 of the sleeve assembly 1 to the first end of the sleeve assembly 1, that is, when the sleeve assembly 1 is in a vertical state, the bottom of the second side 122 is located above the bottom of the first side 121.

Spacing portion 13 and thimble assembly 1 second end 12's terminal surface bottom all becomes cambered surface or inclined plane, when the puncture, the power of applying force to the puncture ware is concentrated on puncture tip 211, along with stretching into of puncture tip 211, thimble assembly 1 is at first along spacing portion 13's terminal surface, then along the terminal surface entering abdominal cavity of thimble assembly 1 second end 12, the setting of cambered surface or inclined plane does benefit to the doctor and operates the control of the puncture power of gradual change in the operation of puncturing, also can avoid the puncture ware to cause the damage to the skin of patient's stomach wall simultaneously.

The limiting part 13 is formed by extending part of the tube wall of the sleeve assembly 1 downwards. Stop 13 is formed by extending a portion of the wall of sleeve assembly 1 downward, where "down" in this embodiment refers to a direction along the central axis of sleeve assembly 1 toward second end 12, and "up" refers to a direction along the central axis of sleeve assembly 1 toward the first end. The definitions of "up" and "down" directions apply to all components of the coreless piercer of the present embodiment. The wall thickness of the limiting part 13 is smaller than that of the rest parts of the sleeve pipe assembly 1, the inner wall of the limiting part 13 and the rest inner walls of the sleeve pipe assembly 1 jointly form a passage for the medical instrument to enter and exit, the wall surface of the passage is smooth, and the medical instrument is free of obstacles when entering and exiting the passage. The outer wall of the limiting portion 13 is provided with a plurality of protrusions 131 to divide the limiting portion 13 into a fixing groove 132, two sliding grooves 133 and two accommodating grooves 134, and the protrusions 131 and the limiting portion 13 are integrally formed or connected with each other. The fixing groove 132, the sliding groove 133 and the receiving groove 134 all extend downward. The fixing groove 132 is located at the horizontal center of the limiting portion 13, the two receiving grooves 134 are separated from the left and right sides of the fixing groove 132, the two sliding grooves 133 are separated from the left and right sides of the two receiving grooves 134, and a second sliding groove 135 is formed on the wall surface of the fixing groove 132 corresponding to the first sliding groove 212 of the puncturing piece 21.

The puncture body assembly 2 is installed on the sleeve assembly 1, and the puncture sheet 21 and the protective shell 22 are sequentially stacked in the limiting part 13 formed by the sleeve assembly 1. The puncturing blade 21 is placed in the fixing groove 132, the puncturing tip 211 protrudes from the end surface of the second end 12 of the cannula assembly 1, the two sides of the protective casing 22 are placed in the sliding grooves 133, two bosses 222 on the inner wall of the protective casing 22 are embedded in the receiving grooves 134 and are aligned with the top surfaces of the receiving grooves 134 along the axial direction of the cannula assembly 1, and an elastic member is disposed between the top surface of each receiving groove 134 and the corresponding boss 222, and in one embodiment of the present invention, the elastic member is a spring 23. The slider 221 on the inner wall of the protective case 22 is further inserted into the second sliding groove 135 on the wall surface of the fixing groove 132 through the first sliding groove 212 on the puncturing piece 21.

When the coreless puncture outfit of the present embodiment is used, like the conventional puncture outfit, a doctor firstly makes a small incision on the abdomen of a patient, and then aligns the bottom end of the protective shell 22 of the coreless puncture outfit of the present embodiment with the small incision, at this time, the coreless puncture outfit is in an initial state, as shown in fig. 2 and 4, the slider 221 on the inner wall of the protective shell 22 is located at the bottom ends of the first sliding slot 212 of the puncture piece 21 and the second sliding slot 135 of the limiting portion 13, the spring 23 is in the initial state, and the protective shell 22 covers the puncture tip 211 of the puncture piece 21. To facilitate puncturing, the position of the protective case 22 in the initial state is defined such that the bottom thereof slightly protrudes from the puncturing tip 211 of the puncturing blade 21. During puncturing, the doctor applies a downward force to the puncture outfit, the protective shell 22 slides away from the puncture tip 211 under the blocking of the abdominal wall, the puncture tip 211 is exposed from the bottom of the protective shell 22, as shown in fig. 1 and 3, the sliding block 221 on the protective shell 22 slides towards the tops of the first sliding groove 212 and the second sliding groove 135, simultaneously the boss 222 moves towards the top surface of the receiving groove 134, and the spring 23 in the receiving groove 134 is compressed and deformed. The length of the first runner 212, the second runner 135 and the amount of elastic deformation of the spring 23 define the distance that the protective casing 22 can slide, preventing it from sliding indefinitely up the outer wall of the cannula assembly 1. When the puncture is completed, the protective casing 22 and the second end 12 of the cannula assembly 1 enter the abdominal cavity of the patient under the driving of the puncture sheet 21. The protective shell 22 is no longer blocked by the abdominal wall, and the spring 23 returns to the initial state under the action of the elastic force, i.e. the slider 221 falls back to the bottom end of the first sliding slot 212 again, and the protective shell 22 covers the puncture tip 211 of the puncture sheet 21 again.

In the embodiment, the puncture body assembly 2 is adopted to replace the traditional puncture core rod to realize the puncture function, and compared with the traditional puncture device, the structure is simpler. Meanwhile, the puncture body assembly 2 is directly arranged on the tube wall of the cannula assembly 1 and does not need to be inserted through a sealing assembly, so that the sealing performance of the sealing assembly is not affected by the puncture body assembly 2 in the embodiment, the puncture body assembly 2 does not need to be disassembled to be packaged with the cannula assembly 1, the packaging space and the packaging cost of a single puncture device are saved, the cost is lower, and the coreless puncture device in the embodiment has greater economic benefit.

In addition, the protective shell 22 of the coreless puncture outfit of the present embodiment can rapidly change between the initial state and the puncture state under the action of the elastic force, so that even though some doctors with insufficient experience use the coreless puncture outfit of the present embodiment, the damage to the patient caused by the downward inertial force when the puncture tip 211 enters the abdominal cavity or the rotation of the puncture outfit during the operation process can be effectively avoided. Therefore, the coreless puncture instrument in the present embodiment has higher safety operability.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A coreless puncture instrument, comprising a cannula assembly and a puncture body assembly, wherein the cannula assembly comprises a lumen for providing a passage for a medical instrument; the puncture body assembly comprises a puncture sheet and a protective shell; the puncture body assembly is arranged on the outer wall of the sleeve assembly; the puncture sheet comprises a puncture tip, and the puncture sheet is fixedly arranged on the sleeve assembly; the protective shell and the cannula assembly are in sliding connection, so that the puncture tip can be exposed from the bottom of the protective shell;

the coreless puncture outfit further comprises a sealing assembly, the sleeve assembly comprises a first end and a second end, the first end of the sleeve assembly can be sealed by the sealing assembly, the second end of the sleeve assembly is divided into a first side and a second side along the radial direction, a limiting part is formed on the outer wall of the first side, and the puncture body assembly is arranged in the limiting part; when the piercing body assembly is disposed in the stop, the piercing body assembly does not seal against the second end of the cannula assembly.

2. The coreless piercer of claim 1, wherein a bottom of the stop projects beyond an end face of the second end of the cannula assembly.

3. The coreless piercer of claim 1, wherein the stop and the bottom end surface of the second end of the cannula assembly are both curved or beveled.

4. The coreless puncture instrument of claim 1, wherein the stop is formed by a portion of the wall of the sleeve assembly extending downward, and the wall thickness of the stop is smaller than the wall thickness of the rest of the sleeve assembly.

5. The coreless puncture instrument of claim 4, wherein the position-limiting portion is provided with a plurality of projections that divide the position-limiting portion into a fixing groove and a sliding groove, and the fixing groove and the sliding groove both extend downward.

6. The coreless piercer of claim 5, wherein the fixation slot is adapted to receive the piercing tab, and wherein two of the sliding slots are located on either side of the fixation slot and adapted to receive either side of the protective shell.

7. The coreless piercer of claim 6, wherein two receiving slots are formed in the stopper, the two receiving slots being respectively located between the fixing slot and the two sliding slots, the receiving slots extending downward.

8. The coreless piercer of claim 7, wherein two bosses are formed on an inner wall of the protective housing, and the two bosses are inserted into the receiving grooves and are aligned with top surfaces of the two receiving grooves in an axial direction of the cannula assembly, respectively.

9. The coreless piercer of claim 8, wherein the resilient member is captured between the boss and the top surface of the corresponding receiving slot.

10. The coreless puncture instrument according to claim 1, wherein the puncture sheet is provided with a first sliding groove extending along the axial direction of the cannula assembly, and the inner wall of the protective casing is provided with a sliding block which is embedded in the first sliding groove.

11. The coreless puncture instrument of claim 10, wherein the position-limiting portion has a second sliding slot corresponding to the first sliding slot of the puncture sheet, and the slider of the protective shell is embedded in the first sliding slot and the second sliding slot.