Suction needle

Abstract

The utility model relates to the technical field of suction needles, in particular to a suction needle which comprises an inner needle and an outer needle with a suction channel, the inner needle is detachably arranged in the suction channel of the outer needle, and the suction needle further comprises a fixing device which is arranged on the outer needle and has a folded state and an unfolded state. According to the suction needle, the outer needle body and the inner needle body are arranged, the channel formed by the outer needle body and the inner needle body is communicated with the fixing device and the control channel, gas or liquid is injected through the control channel, bulging and recovery of the fixing device are controlled, and therefore the locking function is added to the outer needle body, sliding is avoided, and the suction needle is convenient to use. The upper part of the outer surface of the outer needle is provided with a plurality of spirally arranged through holes, so that the end part of the suction needle can be prevented from being blocked under the action of the through holes.

Description

Technical Field

[0001] The utility model relates to the technical field of aspiration needles, in particular to an aspiration needle. Background Art

[0002] When treating the gallbladder, cysts and other sites where there is fluid accumulation in the cavity, it is usually necessary to puncture the needle into the site under the guidance of an image, and the accumulated fluid must be extracted before subsequent treatment can be performed. The current existing technology usually uses an aspiration needle, which includes a solid inner needle and a hollow outer needle. The outer needle is sleeved outside the inner needle, and the inner needle has a needle tip that can pierce the tissue. With the assistance of an image, the needle tip is punctured into the cavity that needs to be aspirated. When aspiration is required, the inner needle is pulled out, and a suction channel is established through the hollow outer needle. The accumulated fluid in the cavity is extracted by applying negative pressure through a negative pressure device or a syringe. However, the current technology has the following defects: 1. The outer needle sleeve is easy to scratch the cyst cavity and surrounding tissues; 2. The end side of the outer needle sleeve is easy to be blocked (therefore, the outer needle sleeve increases a through hole to reduce the probability of blockage and ensure the smooth completion of the drainage process); 3. The aspiration needle is easy to shift (add a fixing device), so we have introduced an aspiration needle. Utility Model Content

[0003] The main purpose of the utility model is to provide an aspiration needle, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A suction needle comprises an inner needle and an outer needle with a suction channel, wherein the inner needle is detachably arranged in the suction channel of the outer needle, and further comprises a fixing device arranged on the outer needle and having a folded state and an unfolded state.

[0006] Preferably, in the folded state, the fixing device is unfolded outward to form a blocking portion.

[0007] Preferably, in the expanded state, the fixing device is folded inwardly and closely attached to the outer surface of the outer needle.

[0008] Preferably, the outer needle further comprises a control channel connected to the balloon.

[0009] Preferably, the outer needle comprises an inner tube and an outer tube, the inner tube and the outer tube enclose the control channel, one end of the control channel is connected to the balloon, and the other end is provided with a connecting port.

[0010] Preferably, the outer tube has an annular notch, and the balloon is arranged at the notch.

[0011] Preferably, the balloon is tubular, and both ends of the balloon are fixedly connected to the inner surface of the outer tube.

[0012] Preferably, the balloon is a rubber balloon or a TPE balloon.

[0013] Preferably, the fixing device is arranged close to the needle tip of the outer needle.

[0014] Preferably, the outer needle is further provided with a plurality of through holes connected to the suction channel, and the through holes are located between the fixing device and the needle tip of the outer needle.

[0015] Preferably, the through holes are arranged in a spiral shape.

[0016] Preferably, the outer needle has a flat head.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. By setting an outer needle and an inner needle, the channel formed by the outer needle and the inner needle connects the fixing device and the control channel. Gas or liquid is injected through the control channel to control the inflation and recovery of the fixing device, thereby adding a locking function to the outer needle to prevent sliding.

[0019] 2. By arranging a plurality of spirally arranged through holes on the upper portion of the outer surface of the outer needle, the through holes can prevent the end of the suction needle from being blocked.

[0020] 3. The outer needle adopts a flat head structure, and since there is no needle tip, it is not easy to scratch the cyst cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of an aspiration needle of the utility model;

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of an aspiration needle of the utility model;

[0023] Figure 3 This is a schematic diagram of the use of a fixing device for an aspiration needle according to the utility model;

[0024] Figure 4 This is an enlarged view of part A of an aspiration needle of the utility model.

[0025] In the figure: 1, outer needle seat; 2, control channel; 3, outer needle; 4, fixing device; 5, inner needle; 6, through hole; 7, inner tube; 8, outer tube; 51, inner needle seat. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] See also Figure 1-3 , the utility model provides a technical solution:

[0030] A suction needle comprises an inner needle 5 and an outer needle 3 having a suction channel, wherein the inner needle 5 is detachably arranged in the suction channel of the outer needle 3, and further comprises a fixing device 4 arranged on the outer needle 3 and having a folded state and an unfolded state.

[0031] In the folded state, the fixing device 4 is unfolded outward to form a blocking portion;

[0032] In the unfolded state, the fixing device 4 is folded inwards and closely attached to the outer surface of the outer needle 3 .

[0033] In this embodiment, the outer needle 3 also includes a control channel 2 connected to the balloon; the outer needle 3 includes an inner tube 7 and an outer tube 8, the inner tube 7 and the outer tube 8 enclose a control channel 2, one end of the control channel 2 is connected to the balloon, and the other end is provided with a connecting port 2; the outer tube 8 has an annular notch, and the balloon is arranged at the notch; the balloon is tubular, and its two ends are fixedly connected to the inner surface of the outer tube 8; the balloon is a rubber balloon or TPE (Thermoplastic Elastomer); the fixing device 4 is arranged near the needle tip of the outer needle 3; the outer needle 3 is also provided with a plurality of through holes 6 connected to the suction channel, and the through holes 6 are located between the fixing device 4 and the needle tip of the outer needle 3; the through holes 6 are arranged in a spiral shape; the outer needle 3 is flat-headed, and the outer needle 3 has a flat head and has no needle tip, so it is not easy to scratch the capsule cavity.

[0034] It should be noted that the utility model is a suction needle. During use, an outer needle 3 and an inner needle 5 are provided so that the channel formed by the outer needle 3 and the inner needle 5 connects the fixing device 4 and the control channel 2. Gas or liquid is injected through the control channel 2 to control the swelling and recovery of the fixing device 4, thereby adding a locking function to the outer needle 3 to prevent sliding. During the process of aspirating the effusion, a plurality of spirally arranged through holes 6 are provided on the upper portion of the outer surface of the outer needle 3. Under the action of the through holes 6, the end of the suction needle can be prevented from being blocked.

[0035] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An aspiration needle, comprising an inner needle (5) and an outer needle (3) having a suction channel, wherein the inner needle (5) is detachably arranged in the suction channel of the outer needle (3), characterized in that: It also includes a fixing device (4) arranged on the outer needle (3) and having a folded state and an unfolded state. In the folded state, the fixing device (4) is unfolded outward to form a blocking portion; In the expanded state, the fixing device (4) is folded inwards and closely adheres to the outer surface of the outer needle (3).

2. An aspiration needle according to claim 1, characterized in that: The fixing device (4) is a balloon, and the outer needle (3) further comprises a control channel (2) connected to the balloon.

3. An aspiration needle according to claim 2, characterized in that: The outer needle (3) comprises an inner tube (7) and an outer tube (8), wherein the inner tube (7) and the outer tube (8) enclose the control channel (2), one end of the control channel (2) is connected to the balloon, and the other end is provided with a connection port.

4. The aspiration needle according to claim 3, characterized in that: The outer tube (8) has an annular notch, and the balloon is arranged at the notch.

5. The aspiration needle according to claim 4, characterized in that: The balloon is tubular, and its two ends are fixedly connected to the inner surface of the outer tube (8).

6. The aspiration needle according to claim 2, characterized in that: The balloon is a rubber balloon or a TPE balloon.

7. The aspiration needle according to claim 1, characterized in that: The fixing device (4) is arranged close to the needle tip of the outer needle (3).

8. An aspiration needle according to claim 7, characterized in that: The outer needle (3) is also provided with a plurality of through holes (6) connected to the suction channel, and the through holes (6) are located between the fixing device (4) and the needle tip of the outer needle (3).

9. The aspiration needle according to claim 8, characterized in that: The through holes (6) are arranged in a spiral shape.

10. The aspiration needle according to claim 1, characterized in that: The outer needle (3) has a flat head.

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