An air-guided cap assembly for use in puncture instruments

Abstract

This utility model belongs to the field of medical device technology, and particularly relates to a gas-guided cap assembly for use with trocars. Addressing the problem that existing trocar insertion ports cannot prevent aerosol leakage in situations requiring chemotherapy drug aerosol application at the surgical site, this utility model provides a gas-guided cap assembly for use with trocars. The assembly includes a cap body, an assembly structure fixed to the cap body for connection and fixation with the trocar cannula, and an instrument channel for instrument insertion. The cap body has a gas-guided cavity inside, or the cap body forms a gas-guided cavity with the trocar cannula through the assembly structure. One end of the gas-guided cavity has a gas outlet extending out of the cap body. The gas-guided cavity communicates with the instrument channel and divides the instrument channel into at least two segments. This utility model, by establishing a gas-guided cavity in the middle of the instrument channel and connecting a negative pressure suction device externally in advance, prevents aerosol leakage through the instrument insertion port, thus protecting medical personnel.

Description

Technical Field

[0001] This utility model belongs to the field of medical equipment technology, and in particular relates to a gas-conducting cap assembly used in puncture instruments. Background Technology

[0002] A trocar is a common instrument in minimally invasive surgery. After the needle, initially housed within the trocar cannula, is inserted into the abdominal incision, it is withdrawn and inflated to create a pneumoperitoneum. This creates an instrument channel through which instruments can be inserted. In some surgeries, such as after tumor removal, chemotherapy agents are added to the affected area to further solidify the treatment effect. However, some chemotherapy agents produce toxic and harmful microaerosols. Even with a sealing cap, the trocar cannot completely prevent these aerosols from leaking out during instrument movement. If these leaks from the instrument opening, they can harm medical personnel. Therefore, there is an urgent need to develop a cap structure that can prevent aerosols from escaping from the instrument opening.

[0003] For example, a Chinese utility model patent application discloses a balloon puncture device with a suture-holding device [Application No.: 202211478068.1]. This utility model is a balloon puncture device with a suture-holding device. It solves the problem of poor sealing of the fixation device in the prior art. It includes a puncture needle, a condensate gas conduit sleeve circumferentially outside the puncture needle, a puncture cannula circumferentially outside the condensate gas conduit, an annular balloon communicating with the inner cavity of the puncture cannula at the lower end of the puncture cannula, and a gas guide tube at the connecting cannula at the lower end of the conduit seat. The conduit seat has a condensate gas exhaust pipe, and the puncture cannula has a fixation seat that can move axially. The upper end of the fixation seat has a locking structure for positioning the fixation seat. The outer circumferential wall of the locking structure has a suture-holding device for holding the suture, and the outer circumferential wall of the fixation seat has symmetrically arranged folding clamping mechanisms for pressing the suture. The bottom of the fixation seat has a telescopic clamping assembly.

[0004] Although this utility model adds a suture-holding device to the locking mechanism to facilitate doctors suturing wounds, the cap used still cannot prevent the aerosol from escaping and causing harm to medical staff. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a gas-guided cap assembly for use in puncture instruments, which is achieved by setting a gas-guided cavity inside the cap and connecting an external negative pressure suction device.

[0006] This utility model includes a cap body, an assembly structure fixed to the cap body for connection and fixation with the trocar cannula, and an instrument channel for inserting instruments; the cap body has an internal air-guiding cavity or the cap body forms an air-guiding cavity with the trocar cannula through the assembly structure; one end of the air-guiding cavity has an air-guiding port extending out of the cap body; the air-guiding cavity communicates with the instrument channel and divides the instrument channel into at least two segments.

[0007] Preferably, it also includes an air guide shell, the cap body has a receiving cavity, and the air guide shell is assembled on the receiving cavity to cooperate with it to form an air guide cavity.

[0008] Preferably, the air guide shell includes an upper instrument tube and a support body, the cap body includes a lower instrument tube, the support body creates a height difference between the upper and lower instrument tubes, and the upper and lower instrument tubes belong to instrument channels.

[0009] Preferably, the air guide shell further includes an air guide port, which extends through the cap body and out of the cap body, and the air guide port and the air guide pipe port are connected in a through manner.

[0010] Preferably, the support is one or more columns, and the cap body is provided with a slot to accommodate the columns.

[0011] Preferably, the cap body includes an air guide groove, and the air guide tube is embedded in the air guide groove.

[0012] Preferably, the air inlet is provided with protrusions around it.

[0013] Preferably, the assembly structure further includes an elastic sealing ring disposed on the outer periphery of the bottom of the cap body.

[0014] Preferably, the assembly structure includes a mounting groove.

[0015] Preferably, the assembly structure includes a snap-fit.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] This invention provides a pre-extraction of toxic aerosols that escape from the affected area through the instrument channel by establishing an air-guiding cavity before the instrument insertion port, thus preventing toxic aerosols from escaping from the instrument insertion port and harming medical staff. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0019] Figure 2 This is an exploded view of the present invention;

[0020] Figure 3 This is a schematic diagram of the air guide shell of this utility model;

[0021] Figure 4 This is a schematic diagram of the main body of the cap of this utility model;

[0022] Figure 5 for Figure 4 Another perspective illustration;

[0023] Figure 6 This is a schematic diagram illustrating the application of this utility model;

[0024] Figure 7 for Figure 6 Cross-sectional view;

[0025] Figure 8 This is a schematic diagram of another assembly structure of the present invention;

[0026] In the diagram: 1. Cap body; 2. Assembly structure; 3. Instrument channel; 4. Air guide cavity; 41. Air guide port; 5. Air guide shell; 11. Receiving cavity; 51. Upper instrument tube; 52. Support body; 12. Lower instrument tube; 53. Air guide port; 13. Slot; 14. Air guide groove; 531. Protrusion; 21. Elastic sealing ring; 22. Mounting groove; 23. Buckle. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] This utility model relates to a balloon puncture device, such as... Figure 1-5 As shown, it includes a cap body 1, an assembly structure 2 fixed to the cap body 1 for connection and fixation with the trocar cannula, and an instrument channel 3 for inserting instruments; the cap body 1 has an internal air guiding cavity 4 or the cap body 1 forms an air guiding cavity 4 with the trocar cannula through the assembly structure 2; one end of the air guiding cavity 4 has an air guiding port 41 extending out of the cap body 1; the air guiding cavity 4 communicates with the instrument channel 3 and divides the instrument channel 3 into at least two segments.

[0029] In this invention, when in use, the air inlet 41 is connected to a negative pressure suction source, so that the air inlet cavity 4 is under negative pressure, and the aerosol is sucked out from the air inlet 41 in advance, so that it will not leak out from the instrument insertion port.

[0030] Preferably, to save on the cost of a separate design, it can be shared with existing trocar cannulas, such as... Figure 2 , 5 As shown, this utility model constructs an air-guiding cavity 4 by setting an air-guiding shell 5 that cooperates with the cap body 1. Correspondingly, the cap body 1 is provided with a receiving cavity 11, and the air-guiding shell 5 is assembled on the receiving cavity 11 to cooperate with it to form an air-guiding cavity 4.

[0031] Preferably, the air-guiding shell 5 includes an upper instrument tube 51 and a support 52, and the cap body 1 includes a lower instrument tube 12. The support 52 creates a height difference between the upper instrument tube 51 and the lower instrument tube 12, thus constructing an air-guiding cavity 4. The upper instrument tube 51 and the lower instrument tube 12 belong to the instrument channel 3, which is through which instruments are inserted.

[0032] Preferably, for better connection to an external negative pressure source, the air guide housing 5 further includes an air guide port 53, which extends through the cap body 1 and beyond it, and is connected to the air guide port. The air guide port is used to connect to a pipeline for connecting to an external negative pressure source.

[0033] Preferred, such as Figure 3 As shown, the support 52 is one or more columns, and the cap body 1 is provided with a slot 13 to accommodate the columns.

[0034] Preferred, such as Figure 2 As shown, in order to further fix the air guide shell 5, the cap body 1 includes an air guide groove 14, and the air guide port 53 is embedded in the air guide groove 14.

[0035] Preferred, such as Figure 2 , 3 As shown, in order to more securely connect the external negative pressure suction line, the air inlet 53 is provided with protrusions 531 around it to increase friction.

[0036] Preferred, such as Figure 4 As shown, the assembly structure 2 also includes an elastic sealing ring 21 disposed on the outer periphery of the bottom of the cap body 1 to prevent aerosol from leaking out prematurely.

[0037] Preferred, such as Figure 4 As shown, the assembly structure includes a mounting groove 22, which can be fitted with protrusions commonly used for connection in existing sleeves for installation.

[0038] Of course, the assembly structure can be snapped 23 to match another existing technical specification of puncture device, that is, the snap 23 in the figure will be inserted into the corresponding puncture device cannula to form a fit.

[0039] The working principle of this utility model is as follows: Figure 1-8 As shown, the cap body 1 is assembled onto the trocar cannula via the receiving cavity 11 or fixed by inserting the clip 23 into the matching clip hole of the trocar. The air-guiding shell 5 is assembled into the receiving cavity 11 to construct the air-guiding cavity 4. The air-guiding cavity 4 exists between the upper instrument line 51 and the lower instrument line 12. Before the instrument insertion port of the upper instrument line 51, the aerosol is attracted by the air-guiding cavity 4 through the air-guiding tube port 53 connected to the external negative pressure suction source, thus avoiding leakage of aerosol at the instrument insertion port.

[0040] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0041] Although this document frequently uses terms such as cap body 1, assembly structure 2, instrument channel 3, air guide cavity 4, air guide port 41, air guide shell 5, receiving cavity 11, upper instrument tube 51, support body 52, lower instrument tube 12, air guide port 53, slot 13, air guide groove 14, protrusion 531, elastic sealing ring 21, mounting groove 22, and buckle 23, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An air-guiding cap assembly applied to a puncture device, comprising a cap main body (1), an assembling structure (2) fixed on the cap main body (1) for being fixedly connected with a puncture device sleeve, and an instrument channel (3) for inserting an instrument, characterized in that: The cap body (1) has an air-guiding cavity (4) inside, or the cap body (1) forms an air-guiding cavity (4) with the puncture tube through the assembly structure (2); one end of the air-guiding cavity (4) has an air-guiding port (41) extending out of the cap body (1); the air-guiding cavity (4) is connected to the instrument channel (3) and divides the instrument channel (3) into at least two sections.

2. The air-entrained cap assembly for use with a puncture device of claim 1, wherein: It also includes an air guide shell (5), the cap body (1) is provided with a receiving cavity (11), and the air guide shell (5) is assembled on the receiving cavity (11) to cooperate with it to form an air guide cavity (4).

3. The air-entrained cap assembly for use with a puncture device of claim 2, wherein: The air guide shell (5) includes an upper instrument tube (51) and a support (52), and the cap body (1) includes a lower instrument tube (12). The support (52) creates a height difference between the upper instrument tube (51) and the lower instrument tube (12). The upper instrument tube (51) and the lower instrument tube (12) belong to the instrument channel (3).

4. The air-entrained cap assembly for use with a puncture device of claim 3, wherein: The air guide shell (5) also includes an air guide port (53), which extends through the cap body (1) and out of the cap body (1), and the air guide port and the air guide port (53) are connected in a through manner.

5. The air-entrained cap assembly for use with a puncture device of claim 3, wherein: The support (52) is one or more columns, and the cap body (1) is provided with a slot (13) for accommodating the columns.

6. The air-entraining cap assembly for use with a puncture device of claim 4, wherein: The cap body (1) includes an air guide groove (14), and the air guide port (53) is embedded in the air guide groove (14).

7. The air-entraining cap assembly for use with a puncture device of claim 6, wherein: The air inlet (53) is surrounded by protrusions (531).

8. The air-entrainment cap assembly for use with a puncture device of claim 1, wherein: The assembly structure (2) also includes an elastic sealing ring (21) disposed on the bottom periphery of the cap body (1).

9. The air-entrainment cap assembly for use with a puncture device of claim 1, wherein: The assembly structure (2) includes a mounting groove (22).

10. The air-entrainment cap assembly for use with a puncture device of claim 1, wherein: The assembly structure (2) includes a snap fastener (23).

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