A nasopharyngeal specimen extraction device

Abstract

This utility model relates to the field of medical device technology and discloses a nasopharyngeal specimen extraction device, including a fixed tube, an extraction assembly, and a negative pressure suction device connected in sequence. The extraction assembly includes an extraction tube, an annular filter, a fixed ring, and several elastic plates. The annular filter is fixedly disposed on the inner circumferential wall of the extraction tube and is used to allow mixtures such as blood, mucus, or tissue fluid to pass through, while also blocking the passage of nasopharyngeal specimens. The first end of each elastic plate is fixedly disposed on the fixed ring. The second end of each elastic plate is inclined towards the middle of the extraction tube. When the negative pressure suction device is activated, it drives the second ends of each elastic plate to sequentially abut. The closed elastic plates guide the mixture containing the nasopharyngeal specimen to flow towards the annular filter on the outer circumference of the elastic plates. The annular filter blocks the nasopharyngeal specimen, separating the nasopharyngeal specimen from the mixture within the nasopharynx, thus achieving simultaneous specimen protection and visual field cleaning.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a nasopharyngeal specimen extraction device. Background Technology

[0002] The nasopharynx, as a common passageway between the respiratory and digestive tracts, is a susceptible site for various pathogens (such as influenza viruses and herpes viruses). Infection of the nasopharynx with pathogens easily leads to lesions. Nasopharyngeal biopsy is a commonly used method to confirm nasopharyngeal lesions, especially malignant tumors of the nasopharynx. Nasopharyngeal biopsy generally uses nasopharyngeal biopsy forceps to obtain nasopharyngeal specimens through the nasal cavity or oral cavity. The nasopharyngeal specimen is then used to examine the lesions in the nasopharynx. Because the nasopharynx is rich in blood vessels and secretes a lot, the mixture of blood, mucus, or tissue fluid produced during nasopharyngeal biopsy can affect the field of view, leading to difficulties in locating the sampling site or errors. Staff must rely on a negative pressure aspirator to clear the mixture to ensure a clear field of view. However, during the process of clearing the mixture using a negative pressure aspirator, the nasopharyngeal specimen is easily accidentally aspirated into the negative pressure device, requiring a repeat nasopharyngeal specimen sampling, resulting in low operational efficiency. Utility Model Content

[0003] The technical problem this invention aims to solve is that during nasopharyngeal biopsy, staff may accidentally aspirate the nasopharyngeal specimen into the negative pressure device while cleaning the mixture using a negative pressure aspirator, resulting in the need to re-sample the nasopharyngeal specimen, which leads to low operational efficiency.

[0004] To solve the above-mentioned technical problems, this utility model provides a nasopharyngeal specimen extraction device, including a fixed connecting tube, an extraction component and a negative pressure suction device connected in sequence.

[0005] The extraction assembly includes an extraction tube, an annular filter, a fixing ring, and several elastic plates. The annular filter is fixedly disposed on the inner circumferential wall of the extraction tube, and the fixing ring is fixedly disposed on the inner circumferential wall of the annular filter.

[0006] Circular filters are used to allow mixtures such as blood, mucus, or tissue fluid to pass through, while circular filters are used to block nasopharyngeal specimens from passing through.

[0007] The first end of each elastic plate is fixedly mounted on the fixing ring; the second end of each elastic plate is inclined toward the middle of the extraction tube.

[0008] The negative pressure suction device is used to drive the second ends of each elastic plate to stick together in sequence, so as to prevent liquid from passing through the inside of the fixed ring.

[0009] Preferred,

[0010] The first ends of each elastic plate are adjacent to each other, and the first ends of each elastic plate form a ring.

[0011] Preferred,

[0012] There are two elastic plates, both of which are arc-shaped plates with semi-circular cross-sections. The cross-sectional radius of each elastic plate gradually decreases from the first end to the second end.

[0013] Preferred,

[0014] Each elastic plate has a sealing end connected to its second end, and the sealing ends seal and adhere sequentially when the elastic plates are attached in sequence.

[0015] Preferred,

[0016] Each elastic plate has a flap attached to the side wall facing the extraction tube.

[0017] Preferred,

[0018] It also includes a filter assembly, which includes a filter tube, one end of which is connected to a fixed connector and the other end of which is connected to an extraction tube.

[0019] The inner wall of the filter tube has a filter groove, a filter ring is installed in the filter groove, and a fixed filter screen is installed on the filter ring. The fixed filter screen is used to allow mixtures such as blood, mucus or tissue fluid to pass through, and to block the passage of nasopharyngeal specimens.

[0020] Preferred,

[0021] The pore size of a fixed filter screen is larger than that of a ring filter screen.

[0022] Preferred,

[0023] It also includes a negative pressure component, which includes a negative pressure tube. One end of the negative pressure tube is fixedly installed with a connecting tube, and the other end of the negative pressure tube is connected to a negative pressure suction device.

[0024] The extraction tube is installed inside the connecting tube.

[0025] Preferred,

[0026] One end of the connecting pipe is provided with a plug hole; one end of the filter pipe is installed in the plug hole, and the other end of the filter pipe is connected to the fixed connecting pipe.

[0027] Preferred,

[0028] It also includes a negative pressure switch, which includes a fixed handle, a tapered tube, and a connector connected in sequence, with the inner cavities of the fixed handle, tapered tube, and connector communicating with each other;

[0029] The connector is inserted into the filter tube, and the inner cavity of the connector is connected to the inner cavity of the filter tube.

[0030] The inner cavity of the fixed handle is connected to the inner cavity of the fixed connecting tube;

[0031] The fixed handle has a control hole that communicates with the cavity of the fixed handle.

[0032] Compared with the prior art, the nasopharyngeal specimen extraction device of this utility model has the following advantages:

[0033] When the negative pressure suction device of this utility model is started, the second ends of each elastic plate are driven to fit together in sequence, thereby blocking the inner path of the fixed ring covered by the elastic plate. The closed elastic plate guides the mixture containing the nasopharyngeal specimen to the annular filter on the outer periphery of the elastic plate. The annular filter blocks the nasopharyngeal specimen, separating the nasopharyngeal specimen from the mixture in the nasopharynx. This achieves simultaneous specimen protection and field of view cleaning, resulting in high operational efficiency. After the negative pressure is released, the elastic plate automatically resets and unfolds, maintaining the unobstructed flow of the channel without affecting normal airflow circulation. At the same time, it avoids the risk of blockage caused by secretion residue. It integrates specimen interception, fluid sorting, and channel control functions into one unit, reducing the specimen aspiration rate. It is especially suitable for sampling small nasopharyngeal specimens and improving the success rate of biopsy operations. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of a nasopharyngeal specimen extraction device provided in an embodiment of this utility model;

[0035] Figure 2 This is a schematic diagram of the negative pressure switch of a nasopharyngeal specimen extraction device provided in this embodiment of the utility model;

[0036] Figure 3 This is a schematic diagram of the structure of the filter assembly of a nasopharyngeal specimen extraction device provided in this embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the extraction component of a nasopharyngeal specimen extraction device provided in an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the negative pressure component of a nasopharyngeal specimen extraction device provided in an embodiment of this utility model.

[0039] In the diagram: 1. Fixed connecting pipe; 2. Negative pressure switch; 21. Fixed handle; 22. Conical tube; 23. Inserting pipe; 24. Control hole; 3. Filter assembly; 31. Filter tube; 32. Filter tank; 33. Filter ring; 34. Fixed filter screen; 4. Negative pressure assembly; 41. Negative pressure pipe; 42. Connecting pipe; 43. Inserting hole; 5. Extraction assembly; 51. Extraction tube; 52. Annular filter screen; 53. Fixed ring; 54. Leaflet; 55. Sealing end; 56. Elastic plate. Detailed Implementation

[0040] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0041] like Figures 1 to 5 As shown, a preferred embodiment of the present invention provides a nasopharyngeal specimen extraction device, comprising a fixed connecting tube 1, a negative pressure switch 2, a filter assembly 3, a negative pressure assembly 4, and an extraction assembly 5, wherein the inner cavities of each assembly are connected to form an aspiration channel.

[0042] It also includes a negative pressure suction device, which is equipped with a vacuum pump unit. The vacuum pump unit is used to suction nasal secretions under negative pressure.

[0043] Specifically, such as Figure 2 As shown, the negative pressure switch 2 includes a fixed handle 21, a tapered tube 22, and a plug tube 23 connected in sequence, and the inner cavities of the fixed handle 21, the tapered tube 22, and the plug tube 23 are interconnected.

[0044] The inner cavity of the fixed handle 21 is connected to the inner cavity of the fixed tube 1; the fixed handle 21 is provided with a control hole 24, which is connected to the cavity of the fixed handle 21.

[0045] When the vacuum pump unit is started, the inner cavity of the fixed connector 1 is connected to the outside through the control hole 24, so the fixed connector 1 is not under negative pressure. When the operator blocks the control hole 24, the connection between the fixed connector 1 and the outside disappears, and a negative pressure is formed inside the fixed connector 1, initiating suction. After the blockage of the control hole 24 is released, the fixed connector 1 is connected to the outside, and the negative pressure is eliminated. The operator can directly control the negative pressure state of the inner cavity of the fixed connector 1 by blocking or releasing the control hole 24, without relying on repeated starting and stopping of an external negative pressure device. This not only simplifies the operation process and significantly improves intraoperative efficiency, but also, the integrated layout of the fixed handle 21 and the control hole 24 is ergonomic, supporting precise negative pressure control under one-handed operation. Combined with the stable airflow channel design of the tapered tube 22 and the insertion tube 23, the controllability and operational safety of the suction process are ensured while reducing the complexity of the equipment.

[0046] Specifically, such as Figure 3 As shown, the filter assembly 3 includes a filter tube 31, one end of which is connected to the fixed connector 1, and the other end of which is connected to the extraction tube 51.

[0047] The inner wall of the filter tube 31 is provided with a filter groove 32, and a filter ring 33 is installed in the filter groove 32. A fixed filter screen 34 is installed on the filter ring 33. The fixed filter screen 34 is used to allow mixtures such as blood, mucus or tissue fluid to pass through, and to block the passage of nasopharyngeal specimens. The fixed filter screen 34 separates the nasopharyngeal specimens from the mixture in the nasopharynx, realizing one-time sampling of nasopharyngeal specimens with high operational efficiency.

[0048] The connector 23 of the negative pressure switch 2 is inserted into the filter tube 31, and the inner cavity of the connector 23 is connected to the inner cavity of the filter tube 31.

[0049] like Figure 4 As shown, the extraction component 5 includes an extraction tube 51, an annular filter 52, a fixing ring 53, and several elastic plates 56. The annular filter 52 is fixedly disposed on the inner peripheral wall of the extraction tube 51, and the fixing ring 53 is fixedly disposed on the inner peripheral wall of the annular filter 52.

[0050] The annular filter 52 is used to allow mixtures such as blood, mucus, or tissue fluid to pass through, and the annular filter 52 is used to block the passage of nasopharyngeal specimens;

[0051] The first end of each elastic plate 56 is fixedly mounted on the fixing ring 53; the second end of each elastic plate 56 is inclined toward the middle of the extraction tube 51.

[0052] The negative pressure suction device is used to drive the second ends of each elastic plate 56 to stick together in sequence to prevent liquid from passing through the inner side of the fixing ring 53.

[0053] When the negative pressure suction device is activated, it drives the second ends of each elastic plate 56 to sequentially adhere, thereby blocking the inner path of the fixing ring 53 covered by the elastic plate 56. The closed elastic plate 56 guides the mixture containing the nasopharyngeal specimen to the annular filter 52 on the outer periphery of the elastic plate 56. The annular filter 52 blocks the nasopharyngeal specimen, separating it from the mixture inside the nasopharynx. This achieves simultaneous specimen protection and field of view cleaning, resulting in high operational efficiency. After the negative pressure is released, the elastic plate 56 automatically resets and unfolds, maintaining the patency of the channel and not affecting normal airflow circulation. It also avoids the risk of blockage caused by residual secretions. The device integrates specimen interception, fluid sorting, and channel control functions, reducing the specimen aspiration rate. It is especially suitable for sampling small nasopharyngeal specimens and improving the success rate of biopsy procedures.

[0054] Specifically, the pore size of the fixed filter 34 is larger than that of the annular filter 52; thus forming a two-stage filtration structure. The fixed filter 34 blocks larger nasopharyngeal specimens, while the annular filter 52 blocks smaller nasopharyngeal specimens.

[0055] Specifically,

[0056] The first ends of each elastic plate 56 are adjacent to each other, and the first ends of each elastic plate 56 form a ring, thereby preventing the mixture from overflowing through the gaps between each elastic plate 56 and causing the loss of the nasopharyngeal specimen.

[0057] Each elastic plate 56 has a sealing end 55 connected to its second end. When the elastic plates 56 are pressed together in sequence, the sealing ends 55 are pressed together in sequence. When the sealing ends 55 are pressed together, they extend along the axial direction of the extraction tube 51 to form a bonding surface, which further improves the sealing performance of the middle channel.

[0058] Specifically,

[0059] There are two elastic plates 56. Both elastic plates 56 are arc-shaped plates, namely the upper arc plate and the lower arc plate. The cross-section of both elastic plates 56 is semi-circular. The cross-sectional radius of each elastic plate 56 gradually decreases from the first end to the second end. The arc of the cross-section of both elastic plates 56 is 180°. The two elastic plates are symmetrically arranged to facilitate the formation of a tightly closed annular sealing surface.

[0060] Specifically,

[0061] Each arc-shaped plate has a leaflet 54 on its side wall facing the extraction tube 51. The edge of the leaflet 54 is fitted with the inner wall of the extraction tube 51 to help guide the secretions to flow to the annular filter 52 on the periphery.

[0062] Specifically,

[0063] All 54 petals are made of silicone.

[0064] Specifically,

[0065] like Figure 5 As shown, the negative pressure assembly 4 includes a negative pressure tube 41, one end of which is fixedly installed with a connecting tube 42, and the other end of the negative pressure tube 41 is connected to a negative pressure suction device.

[0066] The extraction tube 51 is installed inside the connecting tube 42.

[0067] One end of the connecting tube 42 is provided with a plug hole 43; one end of the filter tube 31 is installed in the plug hole 43. By setting a negative pressure component 4 on the outside of the extraction tube 51, good protection is formed for the extraction tube 51.

[0068] In other embodiments, the nasopharyngeal specimen extraction device includes only a fixed connecting tube 1, an extraction component 5, and a negative pressure suction device that are interconnected.

[0069] In other embodiments, three arc-shaped plates are provided, and the curvature of the fixed end of each arc-shaped plate is 120°.

[0070] In other embodiments, four arc-shaped plates are provided, and the curvature of the fixed end of each arc-shaped plate is 90°.

[0071] The working process of this utility model is as follows: The negative pressure suction device is activated, and the operator inserts the fixed tube 1 into the nasal cavity. At this time, the cavity of the fixed tube 1 is connected to the outside through the control hole 24, and the fixed tube 1 is not under negative pressure. After the nasopharyngeal biopsy forceps obtain the nasopharyngeal specimen through the nasal cavity or oral cavity, the operator seals the control hole 24, the connection between the fixed tube 1 and the outside disappears, and a negative pressure state is formed inside the fixed tube 1. Suctioning of the nasopharyngeal specimen and mixture in the nasal cavity begins. With the negative pressure suction device activated, the second ends of each elastic plate 56 sequentially adhere to form a closed seal. Larger nasopharyngeal specimens are blocked by the fixed filter screen 34 when passing through the filter tube 31, while smaller nasopharyngeal specimens are guided by the closed elastic plate 56 to the annular filter screen 52 on the outer periphery of the elastic plate 56 when passing through the extraction tube 51. The smaller nasopharyngeal specimens are blocked by the annular filter screen 52, thus achieving one-time sampling of the nasopharyngeal specimen. After sampling is completed, the negative pressure suction device is turned off, the negative pressure switch 2 and the filter assembly 3 are disassembled, and the filter assembly 3 and the negative pressure assembly 4 are disassembled. The nasopharyngeal specimen on the fixed filter screen 34 and / or the annular filter screen 52 is removed using nasopharyngeal biopsy forceps.

[0072] In summary, this utility model provides a nasopharyngeal specimen extraction device. When the negative pressure suction device is activated, the second ends of each elastic plate are sequentially abutted, blocking the inner path of the fixed ring covered by the elastic plate. The closed elastic plate guides the mixture containing the nasopharyngeal specimen to the annular filter on the outer periphery of the elastic plate. The annular filter blocks the nasopharyngeal specimen, separating it from the mixture inside the nasopharynx. This achieves simultaneous specimen protection and field of view cleaning, resulting in high operational efficiency. After the negative pressure is released, the elastic plate automatically resets and unfolds, maintaining the patency of the channel and not affecting normal airflow circulation. It also avoids the risk of blockage caused by residual secretions. The device integrates specimen interception, fluid sorting, and channel control functions, reducing the specimen aspiration rate. It is especially suitable for sampling small nasopharyngeal specimens, improving the success rate of biopsy procedures.

[0073] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A nasopharyngeal specimen extraction device, characterized in that: It includes a fixed connecting pipe (1), an extraction component (5), and a negative pressure suction device connected in sequence; The extraction component (5) includes an extraction tube (51), an annular filter (52), a fixing ring (53) and several elastic plates (56). The annular filter (52) is fixedly disposed on the inner peripheral wall of the extraction tube (51), and the fixing ring (53) is fixedly disposed on the inner peripheral wall of the annular filter (52). The annular filter (52) is used to allow blood, mucus or tissue fluid to pass through, and the annular filter (52) is used to block nasopharyngeal specimens from passing through; The first end of each of the elastic plates (56) is fixedly mounted on the fixing ring (53); the second end of each of the elastic plates (56) is inclined toward the middle of the extraction tube (51); The negative pressure suction device is used to drive the second ends of each of the elastic plates (56) to stick together in sequence to prevent liquid from passing through the inner side of the fixing ring (53).

2. The nasopharyngeal specimen extraction device according to claim 1, characterized in that: The first ends of each of the elastic plates (56) are adjacent to each other, and the first ends of each of the elastic plates (56) form a ring.

3. The nasopharyngeal specimen extraction device according to claim 2, characterized in that: There are two elastic plates (56), both of which are arc-shaped plates with semi-circular cross sections. The cross-sectional radius of each elastic plate (56) gradually decreases from the first end to the second end.

4. A nasopharyngeal specimen extraction device according to any one of claims 1-3, characterized in that: Each of the elastic plates (56) has a sealing end (55) connected to its second end. When the elastic plates (56) are sequentially attached, the sealing ends (55) are sequentially sealed and attached.

5. The nasopharyngeal specimen extraction device according to claim 4, characterized in that: Each of the elastic plates (56) has a leaflet (54) attached to the side wall facing the extraction tube (51).

6. The nasopharyngeal specimen extraction device according to claim 5, characterized in that: It also includes a filter assembly (3), which includes a filter tube (31), one end of which is connected to the fixed connector (1), and the other end of which is connected to the extraction tube (51). The inner wall of the filter tube (31) is provided with a filter groove (32), a filter ring (33) is installed in the filter groove (32), and a fixed filter screen (34) is installed on the filter ring (33). The fixed filter screen (34) is used to allow blood, mucus or tissue fluid to pass through, and the fixed filter screen (34) is used to block the passage of nasopharyngeal specimens.

7. A nasopharyngeal specimen extraction device according to claim 6, characterized in that: The pore size of the fixed filter (34) is larger than that of the annular filter (52).

8. The nasopharyngeal specimen extraction device according to claim 7, characterized in that: It also includes a negative pressure component (4), which includes a negative pressure tube (41), one end of which is fixedly installed with a connecting tube (42), and the other end of which is connected to the negative pressure suction device; The extraction tube (51) is disposed inside the connecting tube (42).

9. A nasopharyngeal specimen extraction device according to claim 8, characterized in that: One end of the connecting pipe (42) is provided with a plug hole (43); one end of the filter pipe (31) is installed in the plug hole (43), and the other end of the filter pipe (31) is connected to the fixed pipe (1).

10. A nasopharyngeal specimen extraction device according to claim 6, characterized in that: It also includes a negative pressure switch (2), which includes a fixed handle (21), a tapered tube (22) and a plug tube (23) connected in sequence, and the inner cavities of the fixed handle (21), the tapered tube (22) and the plug tube (23) are interconnected; The insertion tube (23) is inserted into the filter tube (31), and the inner cavity of the insertion tube (23) is connected to the inner cavity of the filter tube (31); The inner cavity of the fixed handle (21) is connected to the inner cavity of the fixed connecting pipe (1); The fixed handle (21) is provided with a control hole (24), which is connected to the cavity of the fixed handle (21).

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