Freezing biopsy needle for digestive endoscopy

Abstract

The frozen biopsy needle comprises a shell, a needle tube is arranged at the left end of the shell, a negative pressure connector is arranged at the right end of the shell, a freezing connector is arranged at the right end of the shell and located below the negative pressure connector, a protective sleeve is connected to the outer side of the needle tube in a sleeved mode, and a sponge sleeve is fixedly connected to the interior of the protective sleeve. The sponge sleeve is in contact with the needle tube, a first spring is arranged in the protective sleeve, a sliding block is slidably connected into the protective sleeve in a sleeved mode, and an ejector block is fixedly connected to the outer side of the sliding block. Through the design of the needle tube, human tissue can be collected, subsequent detection is facilitated, the whole needle tube can be protected through the protection sleeve, the needle head of the needle tube can be protected through the sponge sleeve, the needle head of the needle tube can be prevented from being polluted, the protection sleeve is fixed through contact between the ejector block and the needle tube, and the needle tube is convenient to use. During installation, only the sheath needs to be pushed horizontally, and the use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of frozen biopsy needles, in particular to a frozen biopsy needle for digestive endoscopy. Background Art

[0002] A cryobiopsy needle for digestive endoscopy is a medical device used for biopsy during endoscopic examinations. The working principle of the cryobiopsy needle is to freeze the biopsy site in order to obtain a tissue sample.

[0003] The utility model patent, with patent authorization announcement number CN220141708U, discloses a cryobiopsy needle comprising a handle with an outer sleeve disposed at the end thereof, an inner sleeve disposed within the outer sleeve, and a storage chamber disposed within the handle. The inner sleeve extends into the storage chamber, and the other end of the storage chamber is connected to a negative pressure system. In this utility model, external refrigerant gas enters the storage chamber through a cryogenic connector to freeze human tissue, eliminating the need to remove the tissue from the storage chamber and place it in a freezing dish, which could contaminate the tissue.

[0004] In the above-mentioned prior art, it is inconvenient to protect the needle tip during use of the cryobiopsy needle, which is easily contaminated and affects its use. In addition, the pipeline is usually connected in a threaded manner during the cryogen injection process, which makes the cryogen injection inconvenient. Therefore, improvements are needed. Utility Model Content

[0005] The purpose of the utility model is to provide a cryobiopsy needle for digestive endoscopy, which solves the problem of inconvenient needle protection and the problem of inconvenient refrigerant access.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a frozen biopsy needle for digestive endoscopy, comprising a shell, a needle tube is provided at the left end of the shell, a negative pressure joint is provided at the right end of the shell, a freezing joint is provided at the right end of the shell and below the negative pressure joint, the outer side of the needle tube is sleeved with a sheath, the interior of the sheath is fixedly connected to a sponge sleeve, the sponge sleeve is in contact with the needle tube, a first spring is provided inside the sheath, a slider is slidably sleeved inside the sheath, the outer side of the slider is fixedly connected to a top block, the top block is slidably connected to the sheath, the top block is in contact with the needle tube, and a connecting mechanism is provided on the freezing joint.

[0007] Preferably, one end of the first spring is fixedly connected to the sheath, and the other end of the first spring is fixedly connected to the slider. By designing the first spring, the force of the first spring can act on the slider.

[0008] Preferably, the number of the push blocks is multiple, and the multiple push blocks are in contact with the needle tube. By designing the push blocks, the needle tube can be pressed tightly.

[0009] Preferably, the connection mechanism includes an interface, the interior of the freezing joint is provided with an interface, a plug is slidably sleeved on the interior of the freezing joint, a sealing ring is fixedly sleeved on the interior of the plug, a sponge pad is connected to the interior of the plug, a guide rod is fixedly connected to the outside of the plug, a second spring is provided on the outside of the guide rod, a guide seat is slidably sleeved on the outside of the guide rod, and the guide seat is fixedly connected to the freezing joint. The design of the connection mechanism facilitates the access of the refrigerant.

[0010] Preferably, one end of the second spring is fixedly connected to the plug, and the other end of the second spring is fixedly connected to the guide seat. By designing the second spring, the force of the second spring can act on the plug.

[0011] Preferably, a guide groove is provided inside the guide seat, and a guide rod is slidably connected inside the guide groove. The guide groove is designed so that the guide rod can slide along the guide seat.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] 1. The utility model can collect human tissues by designing the function of the needle tube, which is convenient for subsequent detection. The sheath can protect the entire needle tube, and the sponge cover can protect the needle tip of the needle tube to avoid contamination of the needle tip. The sheath is fixed by the contact between the top block and the needle tube. When installing, you only need to push the sheath horizontally, which is easy to use.

[0014] 2. The utility model is designed with a freezing joint, which can connect the cold pipe to input liquid nitrogen or nitrogen dioxide, and can freeze human tissue. During the cryogen connection process, the cryogen can be input by simply pressing the cold pipe against the plug. The connection of the cold pipe is quick and easy, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0016] Figure 2 For this utility model Figure 1 A three-dimensional cross-sectional view of the local structure;

[0017] Figure 3 For this utility model Figure 2 A magnified view of point A;

[0018] Figure 4 For this utility model Figure 1 The local structure front view and cross-sectional view;

[0019] Figure 5 For this utility model Figure 4 Enlarged view of point B.

[0020] In the figure: 1. Shell; 2. Needle tube; 3. Negative pressure connector; 4. Cryogenic connector; 5. Sheath; 6. Sponge cover; 7. First spring; 8. Slider; 9. Connecting mechanism; 10. Top block; 91. Interface; 92. Plug; 93. Sealing ring; 94. Sponge pad; 95. Guide rod; 96. Second spring; 97. Guide seat; 98. Guide groove. DETAILED DESCRIPTION

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

[0022] See also Figure 1 、 Figure 2 、 Figure 3 The frozen biopsy needle for digestive endoscopy includes a shell 1, a needle tube 2 is provided at the left end of the shell 1, a negative pressure joint 3 is provided at the right end of the shell 1, a frozen joint 4 is provided at the right end of the shell 1 and below the negative pressure joint 3, a sheath 5 is sleeved on the outside of the needle tube 2, a sponge cover 6 is fixedly connected to the inside of the sheath 5, the sponge cover 6 is in contact with the needle tube 2, a first spring 7 is provided inside the sheath 5, one end of the first spring 7 is fixedly connected to the sheath 5, and the other end of the first spring 7 is fixedly connected to the slider 8. By designing the first spring 7, the force of the first spring 7 can act on the slider 8.

[0023] See also Figure 1 、 Figure 2 、 Figure 3 The inner sliding sleeve of the sheath 5 is connected with a slider 8, and the outer side of the slider 8 is fixedly connected with a top block 10. The top block 10 is slidably connected to the sheath 5, and the top block 10 is in contact with the needle tube 2. There are multiple top blocks 10, and multiple top blocks 10 are in contact with the needle tube 2. By designing the top block 10, the needle tube 2 can be pressed tightly, and a connecting mechanism 9 is provided on the freezing joint 4.

[0024] See also Figure 1 、 Figure 4 、 Figure 5The connecting mechanism 9 includes an interface 91, an interface 91 is opened inside the freezing joint 4, a plug 92 is slidably sleeved inside the freezing joint 4, a sealing ring 93 is fixedly sleeved inside the plug 92, a sponge pad 94 is connected to the inside of the plug 92, and a guide rod 95 is fixedly connected to the outside of the plug 92. A second spring 96 is provided on the outside of the guide rod 95, one end of the second spring 96 is fixedly connected to the plug 92, and the other end of the second spring 96 is fixedly connected to the guide seat 97. By designing the second spring 96, the force of the second spring 96 can act on the plug 92, and the outer side of the guide rod 95 is slidably sleeved with a guide seat 97, and a guide groove 98 is opened inside the guide seat 97. The guide groove 98 is internally slidably connected with the guide rod 95, and the guide groove 98 is designed so that the guide rod 95 can slide along the guide seat 97. The guide seat 97 is fixedly connected to the freezing joint 4. The connection mechanism 9 is designed to facilitate the access of the refrigerant.

[0025] The specific implementation process of the present utility model is as follows: When in use, the specific use process of the frozen biopsy needle has been disclosed in the utility model patent with patent authorization announcement number CN220141708U, and will not be repeated here. Through the action of the needle tube 2, human tissue can be collected to facilitate subsequent testing. Through the action of the sheath 5, the needle tube 2 can be protected as a whole. Through the action of the sponge cover 6, the needle tip of the needle tube 2 can be protected to prevent the needle tip of the needle tube 2 from being contaminated. When the needle tube 2 needs to be protected, the sheath 5 is directly pushed horizontally to be sleeved on the outside of the needle tube 2. The needle tube 2 squeezes and pushes the top block 10 to move. The top block 10 drives the slider 8 to move. The slider 8 squeezes the first spring 7, and under the elastic action of the first spring 7, a reaction force is given to the top block 10, which can make the top block 10 press against the needle tube 2, so that the sponge cover 6 is sleeved on the outside of the needle tube 2 to protect the needle tube 2, which is convenient to use.

[0026] When the refrigerant needs to be connected, the cold pipe is inserted into the interface 91, and then the cold pipe is pushed horizontally to move, and the cold pipe is inserted into the plug 92. At the same time, the sealing ring 93 is sleeved on the outside of the cold pipe, and then the plug 92 drives the guide rod 95 to slide along the guide seat 97. The plug 92 will squeeze the second spring 96, so that the plug 92 is separated from the inner wall of the freezing joint 4. Then liquid nitrogen or nitrogen dioxide is input through the freezing joint 4 to freeze the human tissue. During the refrigerant connection process, the refrigerant can be input by simply pressing the cold pipe against the plug 92. The connection of the cold pipe is convenient and fast, and the operation is easy.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cryobiopsy needle for digestive endoscopy, comprising a housing (1), characterized in that: The left end of the shell (1) is provided with a needle tube (2), the right end of the shell (1) is provided with a negative pressure joint (3), the right end of the shell (1) and below the negative pressure joint (3) is provided with a freezing joint (4), the outer side of the needle tube (2) is sleeved with a sheath (5), the interior of the sheath (5) is fixedly connected with a sponge sleeve (6), the sponge sleeve (6) is in contact with the needle tube (2), the interior of the sheath (5) is provided with a first spring (7), the interior of the sheath (5) is slidably sleeved with a slider (8), the outer side of the slider (8) is fixedly connected with a top block (10), the top block (10) is slidably connected to the sheath (5), the top block (10) is in contact with the needle tube (2), and a connecting mechanism (9) is provided on the freezing joint (4).

2. The cryobiopsy needle for digestive endoscopy according to claim 1, characterized in that: One end of the first spring (7) is fixedly connected to the sheath (5), and the other end of the first spring (7) is fixedly connected to the slider (8).

3. The cryobiopsy needle for digestive endoscopy according to claim 1, characterized in that: There are multiple top blocks (10), and all of the top blocks (10) are in contact with the needle tube (2).

4. The cryobiopsy needle for digestive endoscopy according to claim 1, characterized in that: The connecting mechanism (9) includes an interface (91), the interior of the freezing joint (4) is provided with an interface (91), the interior of the freezing joint (4) is slidably sleeved with a plug (92), the interior of the plug (92) is fixedly sleeved with a sealing ring (93), the interior of the plug (92) is connected to a sponge pad (94), the outside of the plug (92) is fixedly connected to a guide rod (95), the outside of the guide rod (95) is provided with a second spring (96), the outside of the guide rod (95) is slidably sleeved with a guide seat (97), and the guide seat (97) is fixedly connected to the freezing joint (4).

5. The cryobiopsy needle for digestive endoscopy according to claim 4, characterized in that: One end of the second spring (96) is fixedly connected to the plug (92), and the other end of the second spring (96) is fixedly connected to the guide seat (97).

6. The cryobiopsy needle for digestive endoscopy according to claim 4, characterized in that: A guide groove (98) is provided inside the guide seat (97), and a guide rod (95) is slidably connected inside the guide groove (98).

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