Puncture coaxial needle with reflux valve

Abstract

The utility model relates to the field of medical instruments, in particular to a puncture coaxial needle with a reflux valve, which comprises an outer sheath fixedly connected with an outer sheath handle. During puncturing, the inner core penetrates through the outer sheath; the device further comprises a backflow valve. Comprising a valve body, a valve through hole is formed in the valve body, a sealing block is fixedly connected to the top of the valve body, a slot is formed in the sealing block, the valve body is arranged in the outer sheath handle, and the valve body is made of silica gel. The reflux valve on the puncture coaxial needle disclosed by the utility model can ensure smooth penetration of the inner core, and can effectively prevent blood in the inner core from flowing out, so that the blood is effectively prevented from dripping on the skin of a puncture point to cause transfer; meanwhile, due to the arrangement of the backflow valve, the situation that external air enters the body through the outer sheath to form air embolism to form serious complications can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a puncture coaxial needle with a backflow valve. Background Art

[0002] Puncture of lung nodules is percutaneous lung puncture, which is usually an invasive method for examination of lung nodules.

[0003] Lung nodules can be punctured, and pathological examination can be performed after the puncture material is removed, which can effectively clarify the nature of the lung nodules or masses. If it is benign, small in size, and without abnormalities, no special treatment is required. If the nodule is large, the patient has obvious discomfort symptoms, or the nodule has become malignant, surgical resection is required in a timely manner. If necessary, radiotherapy or chemotherapy is also required to reduce adverse reactions. At present, the puncture coaxial needles used in pulmonary nodule puncture biopsy all include an outer sheath and an inner core. During the puncture biopsy, the outer sheath is directly punctured to a specified depth first, and then the inner core is inserted along the outer sheath. When the puncture is completed and the inner core is withdrawn, the blood in the inner core syringe is very easy to flow out. At the same time, if the blood on the syringe drips on other skin, once it is checked that there is a lesion, the blood dripping on the skin at the puncture point will cause metastasis. At the same time, gas will be brought in from the top of the outer sheath during the insertion process, and when the outside air enters the body through the syringe to form an air embolism, it will cause serious complications. At present, most of the puncture coaxial needles are not equipped with valves. Some puncture coaxial needles simply place a rubber block. Although it can prevent blood reflux, the inner core needs to pass through, and the through hole on the rubber block to prevent blood reflux is extremely small, which makes it difficult for the inner core to penetrate, bringing difficulty to the puncture.

[0004] Therefore, there is an urgent need for a puncture coaxial needle with a backflow valve to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a puncture coaxial needle with a backflow valve to solve the problems existing in the prior art. The backflow valve on the puncture coaxial needle can ensure that the inner core passes through smoothly and can effectively prevent the blood in the inner core from flowing out and effectively prevent it from dripping on the skin at the puncture point to cause transfer; at the same time, the setting of the backflow valve can effectively prevent the outside air from entering the body through the outer sheath to form air embolism and form serious complications.

[0006] To achieve the above-mentioned purpose, the utility model provides the following solution: The utility model provides a puncture coaxial needle with a backflow valve, comprising an outer sheath, to which an outer sheath handle is fixedly connected; an inner core, which penetrates the outer sheath during puncture; and further comprising:

[0007] A backflow valve comprises a valve body, a valve through hole is provided in the valve body, a sealing block is fixedly connected to the top of the valve body, a slit is provided on the sealing block, the valve body is arranged in the outer sheath handle, and the valve body is made of silicone.

[0008] Preferably, it further comprises a groove, wherein the top of the valve body is provided with a groove, the groove is communicated with the valve through hole, and the groove is located below the sealing block.

[0009] Preferably, it further comprises a groove, wherein the top of the valve body is provided with a groove, the groove is communicated with the valve through hole, and the groove is located below the sealing block.

[0010] Preferably, the outer sheath handle is provided with a limiting groove I and a limiting groove II, respectively, the limiting groove I is located above the limiting groove II, and the limiting member I is adapted in the limiting groove I, and the limiting member II is adapted in the limiting groove II.

[0011] Preferably, a marker is coated on the slit.

[0012] Preferably, the valve body is an inverted frustum structure.

[0013] Preferably, a sealing block is fixedly connected to the bottom of the valve body, and a slit is formed on the sealing block.

[0014] The utility model discloses the following technical effects: the backflow valve on the puncture coaxial needle disclosed by the utility model can ensure that the inner core passes through smoothly, and can effectively prevent the blood in the inner core from flowing out, and effectively prevent the blood from dripping on the skin of the puncture point to cause transfer; at the same time, the setting of the backflow valve can effectively prevent the outside air from entering the body through the outer sheath to form air embolism and form serious complications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the puncture coaxial needle;

[0017] Figure 2 It is a structural schematic diagram of the backflow valve;

[0018] Figure 3 is a cross-sectional view of the reverse flow valve;

[0019] Figure 4 It is a structural schematic diagram of the backflow valve in the second embodiment;

[0020] Among them, 1. outer sheath; 2. inner core; 3. outer sheath handle; 31. channel; 32. limit groove I; 33. limit groove II; 4. inner core handle; 5. interface; 6. reverse flow valve; 61. valve through hole; 62. groove; 63. sealing block; 64. slit; 65. valve body; 7. limit piece I; 8. limit piece II. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] Embodiment 1

[0024] Reference Figure 1-Figure 3 The utility model provides a puncture coaxial needle with a backflow valve, comprising an outer sheath 1, to which an outer sheath handle 3 is fixedly connected; an inner core 2, which penetrates the outer sheath 1 during puncture; and further comprising:

[0025] The backflow valve 6 comprises a valve body 65, in which a valve through hole 61 is provided, a sealing block 63 is fixedly connected to the top of the valve body 65, a slit 64 is provided on the sealing block 63, the valve body 65 is arranged in the outer sheath handle 3, and the valve body 65 is made of silicone.

[0026] Specifically, Figure 1 As shown, an inner core handle 4 is fixedly connected above the inner core 2. After the outer sheath 1 is punctured, the medical staff holds the inner core handle 4 and inserts the inner core 2 along the outer sheath 1 until the area where the pulmonary nodules are located is punctured; at the same time, in order to facilitate the adaptation of the inner core 2 and the outer sheath 1, an interface 5 is fixedly connected above the outer sheath handle 3, wherein the structure can be cylindrical or inverted truncated cone. A channel 31 is provided in the outer sheath handle 3, and the channel 31 is connected to the syringe of the outer sheath 1, and the diameter of the channel 31 is getting smaller and smaller, wherein the shape of the valve body 65 is arranged in accordance with the shape of the channel 31; in addition, due to the arrangement of the sealing block 63, the diameter of the valve through hole 61 can be slightly larger than the diameter of the inner core 2, which makes it more convenient to puncture the inner core 2 and reduces the difficulty of puncture.

[0027] The puncture coaxial needle disclosed in the utility model is provided with a backflow valve 6 in the outer sheath handle 3, and a sealing block 63 is integrally formed on the valve body 65, wherein the sealing block 63 is also made of silicone material, and a slit 64 is provided on the sealing block 63, so that during the operation, when the outer sheath 1 punctures to the specified position, the inner core 2 penetrates through the outer sheath 1 to puncture the area where the pulmonary nodule is located, and when the inner core 2 penetrates to the outer sheath 1, it will pass through the valve body 65. Since the width of the slit 64 is smaller than the diameter of the valve through hole 61, when the inner core 2 passes through, the two sides of the sealing block 63 are tightly fitted to the outer wall of the inner core 2, which can not only ensure the smooth insertion of the inner core 2, but also prevent external gas from entering, and also prevent blood from flowing back. Since the width of the slit 64 is small, the inner core 2 can also scrape off a part of the blood on it when it is pulled out, so as to better prevent the blood on the inner core 2 from dripping onto other punctured skin surfaces.

[0028] Surgical steps: Preliminarily determine the nodules to be biopsied, as well as the puncture depth and angle based on the preoperative CT scan. During the operation, the patient lies on the examination and treatment bed, and a CT scan is performed again to determine the skin puncture point, puncture angle and depth. Routine disinfection, draping, and local anesthesia are performed, and the inner core 2 of the puncture coaxial needle is punctured to the predetermined position (the area where the lung nodule is located) according to the predetermined puncture angle and depth, and a CT scan is performed to confirm. Subsequently, the inner core 2 of the coaxial needle is withdrawn, and the biopsy gun is sent into the body through the outer sheath 1 of the coaxial needle, and the biopsy tissue is obtained. It is usually necessary to insert the biopsy gun through the coaxial needle multiple times to obtain enough tissue. After the sampling is completed, the coaxial biopsy needle is removed, the puncture point is pressed to stop bleeding, and the operation is completed.

[0029] A further optimized solution further includes a groove 62 . The top of the valve body 65 is provided with a groove 62 . The groove 62 is connected to the valve through hole 61 . The groove 62 is located below the sealing block 63 .

[0030] Specifically, Figure 3 As shown, the sealing block 63 and the valve body 65 are an integrally formed structure, and the groove 62 is directly opened on the valve body 65. It can be an inverted frustum structure or an arc structure, but its diameter must be larger than the diameter of the valve through hole 61, which is more conducive to the insertion of the inner core 2. At the same time, when the inner core 2 is pulled out and there is blood reflux, the groove 62 has a buffering effect, and a connecting tube can be connected to other parts of the slit 64 to collect the blood refluxed in the groove 62.

[0031] A further optimized solution further includes a limit assembly, wherein the limit assembly includes:

[0032] A limit member I7, wherein the limit member I7 is sleeved on the top of the valve body 65;

[0033] The limiting member II8 is sleeved on the bottom of the valve body 65 .

[0034] Furthermore, the outer sheath handle 3 is provided with a limit groove Ⅰ32 and a limit groove Ⅱ33 respectively, the limit groove Ⅰ32 is located above the limit groove Ⅱ33, and the limit member Ⅰ7 is adapted in the limit groove Ⅰ32, and the limit member Ⅱ8 is adapted in the limit groove Ⅱ33.

[0035] Specifically, Figure 2 As shown, in order to ensure the firmness of the valve body 65, a limit member Ⅰ7 and a limit member Ⅱ8 are respectively arranged outside the valve body 65, wherein the limit member Ⅰ7 and the limit member Ⅱ8 are made of rubber, and when installed, they are directly adapted in the limit groove Ⅰ32 and the limit groove Ⅱ33 respectively, so that when the inner core 2 is inserted, the valve body 65 is not easy to move, and the puncture is effectively ensured to be smooth, wherein the limit groove Ⅰ32 and the limit groove Ⅱ33 are integrally formed bosses arranged on the outside of the valve body 65.

[0036] In a further optimized solution, the slit 64 is coated with a marker.

[0037] Specifically, Figure 2 As shown, in order to ensure that medical personnel can perform puncture accurately, a marker is coated on the sealing block 63, and the position of the marker is set corresponding to the position of the valve through hole 61, so that the inner core 2 can smoothly enter the valve through hole 61 when the medical personnel performs puncture.

[0038] According to a further optimized solution, the valve body 65 is an inverted frustum structure.

[0039] Embodiment 2

[0040] Reference Figure 4 As shown, the only difference from the first embodiment is that the bottom of the valve body 65 is fixedly connected with a sealing block 63, and a slit 64 is provided on the sealing block 63. In order to further ensure the sealing performance, the bottom of the valve body 65 can also be integrally formed with a sealing block 63, so that when the inner core 2 is inserted, the opening is extremely small, which can effectively prevent the entry of air, and when it is pulled out, as the inner core 2 is pulled out, the sealing blocks 63 on both sides will close quickly, so that the backflowing blood is blocked by the sealing blocks 63, and the blood on the inner core 2 will also be scraped twice by the upper and lower sealing blocks 63, preventing the residual blood on it from dripping on the punctured skin and causing transfer.

[0041] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A puncture coaxial needle with a backflow valve, comprising an outer sheath (1), to which an outer sheath handle (3) is fixedly connected; an inner core (2), wherein during puncture, the inner core (2) penetrates the outer sheath (1); characterized in that: Also includes: A backflow valve (6); comprising a valve body (65), wherein a valve through hole (61) is provided in the valve body (65), a sealing block (63) is fixedly connected to the top of the valve body (65), a slit (64) is provided on the sealing block (63), the valve body (65) is arranged in the outer sheath handle (3), and the valve body (65) is made of silicone.

2. The puncture coaxial needle with a backflow valve according to claim 1, characterized in that: It also comprises a groove (62). The top of the valve body (65) is provided with the groove (62). The groove (62) is communicated with the valve through hole (61). The groove (62) is located below the sealing block (63).

3. The puncture coaxial needle with a backflow valve according to claim 1, characterized in that: It also includes a limit assembly, which includes: A limit member I (7), wherein the limit member I (7) is sleeved on the top of the valve body (65); A limit member II (8), wherein the limit member II (8) is sleeved on the bottom of the valve body (65).

4. The puncture coaxial needle with a backflow valve according to claim 3, characterized in that: The outer sheath handle (3) is provided with a limit groove I (32) and a limit groove II (33), respectively. The limit groove I (32) is located above the limit groove II (33), and the limit member I (7) is adapted in the limit groove I (32), and the limit member II (8) is adapted in the limit groove II (33).

5. The puncture coaxial needle with a backflow valve according to claim 1, characterized in that: The slit (64) is coated with a marker.

6. The puncture coaxial needle with a backflow valve according to claim 1, characterized in that: The valve body (65) is an inverted frustum structure.

7. The puncture coaxial needle with a backflow valve according to claim 1, characterized in that: A sealing block (63) is fixedly connected to the bottom of the valve body (65), and a slit (64) is formed on the sealing block (63).

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