Pericardium puncture device
By designing a pericardial puncture device containing a limiting plate, the problems of difficulty in pericardial puncture operation and many complications in the prior art of pediatric patients are solved, effectively controlling the depth of the needle into the body, and reducing the occurrence of medical accidents.
Patent Information
- Application Number
- CN202421718248.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-19
AI Technical Summary
The existing pericardial puncture needles are difficult to operate in children's patients, which can easily lead to heart damage and complications. The prior art is difficult to adapt to the physiological characteristics of children.
A pericardial puncture device is designed, including a needle assembly, a needle, a cannula, a syringe and a limiting plate. The needle assembly is equipped with a medicine injection space and a stopper, and the limiting plate is equipped with a through hole and a slot. Through these structures, the depth of the needle is limited by the limiting plate when it is pierced into the body, avoiding too deep puncture.
Through the design of the limiting plate, the needle is limited in depth in the penetration of the body, which reduces the risk of heart damage and reduces the incidence of medical malpractice, especially in childhood patients.
Smart Images
Figure CN222942419U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical instruments, in particular to a pericardiocentesis device. Background Art
[0002] The pericardium is a membranous sac covering the surface of the heart. It protects the heart and prevents the heart cavity from expanding excessively to maintain a constant blood volume. The two layers of the pericardium, the visceral and the wall, turn to form a narrow and closed cavity called the pericardial cavity. The pericardial cavity contains a small amount of fluid, called pericardial fluid, which acts as a lubricant and reduces friction when the heart beats. If the pericardium secretes too much fluid due to infection, tumors, immunity, and idiopathic pericarditis, pericardial effusion may occur, which may lead to life-threatening cardiac tamponade in severe cases. Drugs or surgical treatments should be taken in a timely manner. Most patients can choose pericardiocentesis and drainage to reduce the amount of pericardial effusion and relieve symptoms.
[0003] Pericardiocentesis is a diagnostic and treatment technique that uses a puncture needle to directly penetrate the pericardial cavity. Pericardiocentesis is often performed under ultrasound guidance, but because there are overlapping images of the heart and lungs under ultrasound guidance, the tip of the traditional pericardiocentesis needle is sharp, which can easily cause a series of complications by puncturing the heart and the blood vessels densely distributed on the surface of the heart due to improper operation.
[0004] Furthermore, because children have small hearts, narrow pericardial cavities, and faster heart rates than adults, when performing pericardiocentesis, doctors have a narrow field of view, the puncture site is close to the heart and lungs, and the heart is beating continuously, which can easily damage the heart and blood vessels on the heart, leading to complications such as acute cardiac tamponade, hemothorax, and heart rupture, causing physical damage and economic burden to children. Existing pericardiocentesis needles are mostly designed for adults, which are difficult to adapt to the physiological characteristics of children, are difficult to operate, and may increase surgical risks. Therefore, it is necessary to design a safer pericardiocentesis device. Utility Model Content
[0005] The problem to be solved by the utility model is that the existing puncture needle is easy to cause unnecessary damage to the patient during pericardiocentesis, especially for children.
[0006] In order to solve the above problems, the utility model provides a pericardial puncture device comprising: a pericardial puncture needle and a limiting plate; the pericardial puncture needle comprises: a needle assembly, a needle, a sleeve, and a syringe; a drug injection space extending along a first direction is provided in the needle assembly, a stopper and a pressing piece are provided in the drug injection space, the stopper separates the drug injection space into a drug inlet chamber and a drug outlet chamber, the pressing piece is slidably arranged in the drug inlet chamber, and the stopper is provided with a deformation hole that can connect the drug inlet chamber and the drug outlet chamber through deformation; the lower end of the sleeve is fixed to the upper end of the needle assembly, the lower end of the needle assembly is detachably connected to the upper end of the syringe, the needle is sequentially inserted into the pressing piece, the stopper and the sleeve in the needle assembly, and the lower end of the needle is fixedly connected to the upper end of the syringe; the limiting plate is provided with a through hole and a card slot running through both sides thereof, the through hole is connected with the card slot, the sleeve penetrates the through hole, and can be moved to the card slot to be fixed relative to the limiting plate.
[0007] Furthermore, the pericardiocentesis device also includes a drainage assembly, which includes a drainage tube, a branch tube and a valve. The upper end of the drainage tube is provided with a supporting member protruding from the drainage tube and used to push the pressing member open. The supporting member is hollow, and the upper end tube wall of the drainage tube is provided with a thread. The inner circumferential wall of the lower end of the needle assembly is correspondingly provided with a thread. The upper end of the drainage tube is detachably connected to the lower end of the needle assembly through the thread. The valve is provided on the drainage tube, and the branch tube is provided on the drainage tube and spaced apart from the valve. The valve is a three-way valve.
[0008] Furthermore, it also includes a camera, a connecting line, and a push rod. The push rod is slidably connected to the inside of the syringe. The camera is arranged at the upper end of the needle. The upper end of the connecting line is connected to the camera. The connecting line passes through the push rod, syringe, needle assembly and needle setting in sequence.
[0009] Furthermore, an observation hole communicating with the interior of the needle is provided on the outer peripheral surface of the needle.
[0010] Furthermore, a positioning groove for sticking medical tape is provided on one side of the limiting plate.
[0011] Furthermore, a plurality of positioning grooves are provided on one side of the limiting plate, and the plurality of positioning grooves are cross-arranged.
[0012] Furthermore, the outer peripheral wall of the sleeve is provided with a scale for indicating the length.
[0013] Furthermore, when the needle penetrates the sleeve and the syringe abuts against the needle assembly, the upper end of the needle protrudes from the upper end of the sleeve.
[0014] Furthermore, a first separation plate is provided on the outer peripheral wall of the needle assembly extending along the second direction, and a second separation plate is provided on the outer peripheral wall of the syringe extending along the second direction.
[0015] Furthermore, the inner wall of the through hole and the inner wall of the slot are smoothly transitioned through the arc-shaped wall.
[0016] Compared with the prior art, the beneficial effect of a pericardial puncture device in an embodiment of the utility model is that the needle pushes the stopper to penetrate the injection space in the needle assembly. The specific process of using the pericardial puncture device during surgery is as follows: the doctor determines the patient's pericardial effusion position and the depth of percutaneous puncture based on experience and medical imaging methods, and after adjusting the distance between the limit plate and the upper end of the needle, slides the needle from the through hole to the slot, so that the needle is embedded in the slot and clamped with the limit plate by interference fit. In this way, the relative position of the needle and the limit plate is fixed. During puncture, due to the interference fit between the slot and the needle, the relative position between the needle and the limit plate is fixed. When the side of the limit plate close to the needle is in contact with the patient's skin, the depth of the needle penetrating into the patient's body reaches the deepest. The doctor can observe whether there is pericardial effusion flowing out of the transparent syringe by retracting the push rod to determine whether the needle has penetrated into the pericardial cavity. Therefore, the depth of the needle inserted into the patient's body is limited by the limit plate, and the needle will not penetrate too deeply into the patient's body and puncture the heart, causing heart damage, thereby reducing the occurrence of medical accidents. Moreover, when the patient is a child, compared with the existing method, this embodiment can reduce medical accidents more significantly in clinical applications. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the surgical state of an embodiment of the utility model;
[0018] Figure 2 It is an embodiment of the utility model Figure 1 A partial enlarged view after sectioning;
[0019] Figure 3 It is an embodiment of the utility model Figure 2 A partial enlarged view of
[0020] Figure 4 is a cross-sectional view of a needle assembly according to an embodiment of the utility model;
[0021] Figure 5 It is an embodiment of the utility model Figure 1 A partial enlarged view of
[0022] Figure 6 It is a schematic diagram of a limit plate of an embodiment of the utility model;
[0023] Figure 7 This is a diagram of the postoperative injection or drainage state of an embodiment of the utility model.
[0024] In the figure, 100, pericardiocentesis needle;
[0025] 1. Limiting plate; 11. Through hole; 12. Card slot; 13. Positioning slot;
[0026] 2. Needle; 21. Observation hole;
[0027] 3. Casing;
[0028] 4. syringe; 41. second separation plate;
[0029] 5. Putting;
[0030] 6. needle assembly; 61. stopper; 62. medicine injection space; 621. medicine inlet cavity; 622. medicine outlet cavity; 63. pressing member; 64. first separation plate;
[0031] 7. drainage assembly; 71. drainage tube; 711. first tube section; 712. second tube section; 72. valve; 73. branch pipe;
[0032] 8. Camera; 9. Connecting cable. DETAILED DESCRIPTION
[0033] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0034] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "vertical", "horizontal", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying 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 operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0035] In the description of the utility model, 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 indirectly connected 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 utility model can be understood according to specific circumstances.
[0036] like Figure 1 to Figure 5As shown, a pericardiocentesis device of a preferred embodiment of the utility model comprises: a pericardiocentesis needle 100 and a limiting plate 1; the pericardiocentesis needle 100 comprises: a needle 2 assembly, a needle 2, a cannula 3, and a syringe 4; a drug injection space 62 extending along a first direction is provided in the needle 2 assembly, a stopper 61 and a pressing member 63 are provided in the drug injection space 62, the stopper 61 separates the drug injection space 62 into a drug inlet cavity 621 and a drug outlet cavity 622, the pressing member 63 is slidably provided in the drug inlet cavity 621, and the stopper 61 is provided with a drug inlet cavity 621 that can be connected to the drug outlet cavity 622 by deformation Deformation holes of the medicine inlet chamber 621 and the medicine outlet chamber 622; the lower end of the sleeve 3 is fixed to the upper end of the needle 2 assembly, and the lower end of the needle 2 assembly is detachably connected to the upper end of the syringe 4. The needle 2 is sequentially inserted into the pressing piece 63, the stopper 61 and the sleeve 3 in the needle 2 assembly, and the lower end of the needle 2 is fixedly connected to the upper end of the syringe 4; the limiting plate 1 is provided with a through hole 11 and a card slot 12 running through its two side surfaces, the through hole 11 is connected to the card slot 12, the sleeve 3 is inserted into the through hole 11, and can be moved to the card slot 12 to be relatively fixed with the limiting plate 1.
[0037] Based on the above scheme, the needle 2 pushes the stopper 61 to penetrate the injection space 62 in the needle assembly 6. The specific process of using the pericardiocentesis device during surgery is as follows: the doctor passes the sleeve 3 and the needle 2 in the sleeve 3 through the through hole 11, and after judging the location of the patient's pericardial effusion and the depth of percutaneous puncture based on experience and medical imaging methods (B-ultrasound), adjusts the distance between the limit plate 1 and the needle 2, and slides the sleeve 3 and the needle 2 from the through hole 11 to the slot 12. At this time, the slot 12 and the sleeve 3 are interference fit, and the relative positions of the sleeve 3 and the needle 2 are also fixed. During puncture, due to the interference fit between the slot 12 and the needle 2, it is easy to understand that the slot 12 and the sleeve 3 are also interference fit, so through the slot 12 The friction force between the groove 12 and the sleeve 3 realizes the fixing of the relative positions of the groove 12, the needle 2 and the sleeve 3. When the side of the limiting plate 1 close to the needle 2 is in contact with the patient's skin, the upper end of the needle 2 penetrates the patient's body to the deepest depth. The doctor observes whether there is pericardial effusion flowing out of the transparent syringe by retracting the push rod 5, and can judge whether the needle has penetrated into the pericardial cavity. Therefore, the depth of the needle 2 penetrating into the patient's body is limited by the limiting plate 1, and the heart will not be damaged due to the needle 2 penetrating too deeply into the patient's body and puncturing the heart, thereby reducing the occurrence of medical accidents. In addition, when the patient is a child, compared with the existing method, the reduction in medical accidents in clinical applications of this embodiment is more obvious.
[0038] like Figure 7As shown, preferably, the pericardiocentesis device also includes a drainage assembly 7, which includes a drainage tube 71, a branch tube 73 and a valve 72. The valve 72 divides the drainage tube 71 into a first tube section 711 and a second tube section 712. The upper end of the drainage tube 71 (the upper end of the first tube section 711) is provided with a supporting member (not shown in the figure) protruding from the drainage tube 71 and used to push the pressing member 63 away. The supporting member is hollow, and the tube wall of the upper end of the drainage tube 71 (the upper end of the first tube section 711) is provided with a thread, and the inner circumferential wall of the lower end of the needle assembly 6 is correspondingly provided with a thread. The upper end of the drainage tube 71 (the upper end of the first tube section 711) is detachably connected to the lower end of the needle assembly 6 through a thread. The valve 72 is provided on the drainage tube 71, and the branch tube 73 is provided on the drainage tube 71 and is spaced apart from the valve 72. The valve 72 is a three-way valve.
[0039] Based on the above scheme, after the operation is completed, the specific operation process is as follows: the lower end of the needle assembly 6 is disassembled from the upper end of the syringe 4. Since the needle 2 and the syringe 4 are fixedly connected, the needle 2 and the needle assembly 6 slide and separate from each other, and the upper end of the sleeve 3 still remains in the patient's pericardial cavity. Since the limit plate 1 is a plastic part with a certain elasticity, when the needle 2 slides and separates from the sleeve 3, the card slot 12 and the sleeve 3 are interference fit, and the card slot 12 locks the sleeve 3 through the friction between the card slot 12 and the sleeve 3. As the needle 2 withdraws from the needle assembly 6, the stopper 61 loses the external force to squeeze the deformation hole (not marked in the figure), and the stopper 61 is reset. The stopper 61 separates the medicine inlet cavity 621 and the medicine outlet cavity 622 to seal the injection space 62. The card slot 12 and the stopper 61 jointly prevent the pericardial cavity from communicating with the outside world and block external pathogens from entering the patient's body. The doctor uses medical tape to stick the side of the limiting plate 1 away from the skin to fix the limiting plate 1 and the patient's skin. Compared with suturing the patient's skin and the limiting plate 1 with a needle, this fixing method causes less damage to the patient's skin and reduces the patient's pain.
[0040] If it is necessary to inject medicine into the patient's pericardial cavity later, the upper end of the drainage tube 71 (i.e., the first tube segment 711) is threadedly connected to the lower end of the needle assembly 6, and the abutment member at the upper end of the drainage tube 71 (i.e., the first tube segment 711) pushes the pressing member 63 to slide toward the stopper 61, and the pressing member 63 pushes the stopper 61 away, separating the medical tape and the limit plate 1, moving the limit plate 1, moving the sleeve 3 from the slot 12 to the through hole 11, and opening the valve 72, so that the first tube segment 711 of the drainage tube 71 is not connected to the second tube segment 712, and the first tube segment 711 is connected to the branch tube 73, and the medicine flows from the branch tube 73 to the first tube segment 711 to the pressing portion to the injection space 62 to the sleeve 3 Flows into the patient's pericardial cavity; after the drug injection is completed, close the valve 72 (disconnect the first tube segment 711 from the second tube segment 712 and the branch tube 73), move the limit plate 1, move the sleeve 3 from the through hole 11 to the slot 12, the limit plate 1 locks the sleeve 3, and then separate the upper end of the drainage tube 71 (i.e., the first tube segment 711) from the needle assembly 6, and the abutment at the upper end of the drainage tube 71 (i.e., the first tube segment 711) moves away from the needle assembly 6. Without external force pressure, the elasticity of the stopper 61 resets the stopper 61, and the pressing piece 63 slides in the direction away from the stopper 61, and the stopper 61 blocks the injection space 62.
[0041] In addition, if the patient suffers from pericarditis, it is easy to cause the patient to have repeated pericardial effusion. One puncture cannot completely solve the problem of excessive effusion in the pericardial cavity. The patient needs to continuously drain the pericardial effusion and inject drugs into the pericardial cavity for pericardial lavage. The doctor first drains the patient's pericardial effusion and then injects drugs for treatment. First, the valve 72 closes the branch tube 73, and the pericardial effusion is led out from the first tube segment 711 to the second tube segment 712 (i.e., the drainage tube 71) through the cannula 3 to the injection space 62; during the injection treatment, the drug is injected from the branch tube 73 through the first tube segment 711 to the cannula 3 into the patient's pericardial cavity, and the branch tube 73 is opened by the valve 72, and the drug is injected from the branch tube 73 to the first tube segment 711 through the injection space 62 and then through the cannula 3 into the patient's pericardial cavity. The switching of valve 72 can achieve drainage of pericardial effusion and injection of drugs, which can reduce drug contamination compared to drainage and injection only with drainage tube 71, and is more convenient than disassembling and assembling drainage tube 71 twice (the first drainage tube 71 is used for drainage, and the second drainage tube 71 is installed for injection after the drainage is completed, and the second drainage tube 71 is disassembled after the injection is completed). According to the different conditions of the patients, the drainage and injection of pericardial effusion can be adaptively completed by repeating this process multiple times, without the need to perform pericardial puncture on the patient multiple times. On the one hand, it reduces the risk of multiple surgeries, and on the other hand, the patient's pain is greatly reduced due to the reduction in the number of punctures.
[0042] Based on the above scheme, the flow path of the liquid during the treatment of pericarditis in patients is briefly described as follows: the flow path of the pericardial effusion during drainage is: the pericardial effusion flows from the patient's pericardial cavity to the cannula 3 to the drug injection space 62 (i.e., the drug outlet cavity 622 to the pressing piece 63) to the first tube segment 711 to the second tube segment 712 to flow into the medical pericardial effusion storage device; the flow path for injecting drugs is: the drug flows from the branch tube 73 to the first tube segment 711 to the drug injection space 62 (i.e., the pressing piece 63 to the drug outlet cavity 622) to the cannula 3 to reach the patient's pericardial cavity.
[0043] Further preferably, the drainage tube 71 (ie, the second tube section 712) is connected to a negative pressure device away from the patient end, so that there is a certain pressure difference between the patient's body and the outside world to achieve a better drainage effect.
[0044] like Figure 1 and Figure 5 As shown, preferably, the pericardial puncture device also includes a camera 8, a connecting line 9, and a push rod 5. The push rod 5 is slidably connected to the inside of the syringe 4. The camera 8 is arranged at the upper end of the needle 2. The upper end of the connecting line 9 is connected to the camera 8. The connecting line 9 passes through the push rod 5, the syringe 4, the needle 2 assembly and the needle 2 setting in sequence. Improve accuracy: Through real-time image feedback, the doctor can observe the position and puncture process of the needle 2 in real time to ensure accurate entry into the pericardial cavity and reduce the risk of accidental injury to other tissues or organs. Since the micro camera 8 transmits image signals and power through the connecting line 9, the image signal transmission is more stable than that of the camera connected via Bluetooth or wifi; Reduce patient discomfort: Accurate puncture operation can reduce damage to surrounding tissues, thereby reducing the patient's pain and discomfort.
[0045] like Figure 2 As shown, preferably, the outer peripheral surface of the needle 2 is provided with an observation hole 21 connected to the interior thereof, and the sleeve 3 is made of a transparent material. Based on the above scheme, when the doctor performs pericardiocentesis on the patient, he or she observes whether there is pericardial effusion flowing out of the observation hole 21 located outside the patient's body. Generally speaking, pericardial effusion of different causes is clear, light yellow or blood red, which assists the doctor in judging whether the pericardiocentesis is successful.
[0046] like Figure 6 As shown, preferably, a positioning groove 13 for sticking medical tape is provided on one side of the limiting plate 1. The presence of the positioning groove 13 allows the medical tape to be more stably fixed on the limiting plate 1, preventing the limiting plate 1 from sliding or falling off during the process of being retained outside the patient's body, and ensuring the firmness of the cannula 3 fixed inside the patient's body, thereby ensuring the stability and safety of the medical device.
[0047] Preferably, a plurality of positioning grooves 13 are further provided on one side of the limiting plate 1, and the plurality of positioning grooves 13 are cross-arranged. The cross-arranged positioning grooves 13 provide stability for the connection between the limiting plate 1, the medical tape and the patient's skin, help reduce the relative displacement between the limiting plate 1 and the patient's skin, maintain the stability of the entire pericardiocentesis device, and further improve the firmness of the fixing of the limiting plate 1 in vitro.
[0048] Preferably, the outer wall of the cannula 3 is provided with a scale for indicating the length. Precise control of depth: The scale enables the doctor to precisely control the insertion depth of the cannula 3 (and the internal needle 2). Reduce the risk of complications: By precisely controlling the depth, the doctor can ensure that the cannula 3 and the needle 2 are not inserted too deeply, thereby reducing the risk of tissue damage or complications that may result, which is crucial to the safety and health of the patient. Improve operational efficiency: The scale design is intuitive and easy to use. The doctor does not need to use additional measuring tools to determine the depth of puncture into the patient's body, thereby saving time and improving operational efficiency.
[0049] Preferably, when the needle 2 penetrates the sleeve 3 and the syringe 4 abuts against the needle 2 assembly, the upper end of the needle 2 protrudes from the upper end of the sleeve 3. Since the tip of the needle 2 is exposed, it is easy for the doctor to puncture during operation.
[0050] Preferably, the outer peripheral wall of the needle assembly 6 is provided with a first separation plate 64 extending along the second direction, and the outer peripheral wall of the syringe 4 is provided with a second separation plate 41 extending along the second direction. Based on the above scheme, when the doctor separates the needle assembly 6 and the syringe 4, the first separation plate 64 and the second separation plate 41 can be separated to achieve rapid separation of the needle assembly 6 and the syringe 4, which is easy to operate during pericardial puncture and provides convenience for the doctor during the operation.
[0051] Preferably, the inner wall of the through hole 11 and the inner wall of the slot 12 are smoothly transitioned through an arc wall segment. The aperture should be gradually reduced rather than suddenly changed, which can reduce the resistance of the needle 2 during the sliding process from the through hole 11 to the slot 12. Smooth transition curve: Use arcs or curves to transition the aperture change from the through hole 11 to the slot 12, avoiding sharp edges or angles, which can reduce friction and prevent scratches on the sleeve 3.
[0052] In summary, the embodiment of the utility model provides a pericardiocentesis device, in which the needle 2 pushes the stopper 61 to penetrate the injection space 62 in the needle 2 assembly. The process of using the pericardiocentesis device in surgery is as follows: the doctor passes the cannula 3 and the needle 2 through the through hole 11, and judges the position and depth of the patient's pericardial effusion based on experience and medical imaging methods, and after adjusting the distance between the limit plate 1 and the needle 2, the cannula 3 and the needle 2 are slid from the through hole 11 to the slot 12. During puncture, the slot 12 and the cannula 3 are interference fit, and the relative positions of the cannula 3 and the needle 2 are also fixed. During puncture, due to the interference fit between the slot 12 and the cannula 3, the cannula 3 passes through the slot 12 and the cannula 3. The friction force between 3 realizes the fixation of the relative position between the card slot 12 and the sleeve 3. When the side of the limiting plate 1 close to the needle 2 fits the patient's skin, the needle 2 penetrates the patient's body to the deepest depth. The doctor observes whether there is pericardial effusion flowing out of the transparent syringe by retracting the push rod 5, and can judge whether the needle 2 has penetrated to the pericardial cavity. Therefore, the depth of the needle 2 penetrating into the patient's body is limited by the limiting plate 1, and the needle 2 will not penetrate the patient's body too deeply and puncture the heart to cause heart damage, thereby reducing the occurrence of medical accidents. Moreover, when the patient is a child, compared with the existing method, the present embodiment has a more obvious reduction in medical accidents in clinical applications.
[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.
Claims
1. A pericardiocentesis device, characterized in that: include: Pericardiocentesis needle (100) and limiting plate (1); The pericardial puncture needle (100) comprises: a needle assembly (6), a needle (2), a cannula (3), and a syringe (4); The needle assembly (6) is provided with a drug injection space (62) extending along a first direction, and a stopper (61) and a pressing member (63) are provided in the drug injection space (62). The stopper (61) separates the drug injection space (62) into a drug inlet chamber (621) and a drug outlet chamber (622). The pressing member (63) is slidably arranged in the drug inlet chamber (621), and the stopper (61) is provided with a deformation hole capable of connecting the drug inlet chamber (621) and the drug outlet chamber (622) through deformation. The lower end of the sleeve (3) is fixed to the upper end of the needle assembly (6), and the lower end of the needle assembly (6) is detachably connected to the upper end of the syringe (4). The needle (2) is sequentially inserted into the pressing member (63), the stopper (61) and the sleeve (3) in the needle assembly (6), and the lower end of the needle (2) is fixedly connected to the upper end of the syringe (4); The limiting plate (1) is provided with a through hole (11) and a slot (12) penetrating two side surfaces thereof; the through hole (11) is communicated with the slot (12); the sleeve (3) penetrates the through hole (11) and can be movably embedded in the slot (12) to be relatively fixed with the limiting plate (1).
2. The pericardiocentesis device according to claim 1, characterized in that: The invention also comprises a drainage assembly (7), wherein the drainage assembly (7) comprises a drainage tube (71), a branch tube (73) and a valve (72); the upper end of the drainage tube (71) is provided with a supporting member protruding from the drainage tube (71) and used to push the pressing member (63); the supporting member is hollow; the upper end tube wall of the drainage tube (71) is provided with a thread; the inner peripheral wall of the lower end of the needle (2) assembly is correspondingly provided with a thread; the upper end of the drainage tube (71) is detachably connected to the lower end of the needle (2) assembly via the thread; the valve (72) is provided on the drainage tube (71); the branch tube (73) is provided on the drainage tube (71) and is spaced apart from the valve (72); the valve (72) is a three-way valve.
3. The pericardiocentesis device according to claim 1, characterized in that: It also includes a camera (8), a connecting line (9), and a push rod (5), wherein the push rod (5) is slidably connected to the inside of the syringe (4), the camera (8) is arranged at the upper end of the needle (2), the upper end of the connecting line (9) is connected to the camera (8), and the connecting line (9) passes through the push rod (5), the syringe (4), the needle (2) assembly and the needle (2) setting in sequence.
4. The pericardiocentesis device according to claim 1, characterized in that: The outer peripheral surface of the needle (2) is provided with an observation hole (21) communicating with the interior thereof.
5. The pericardiocentesis device according to claim 1, characterized in that: One side of the limiting plate (1) is provided with a positioning groove (13) for sticking medical tape.
6. The pericardiocentesis device according to claim 5, characterized in that: A side surface of the limiting plate (1) is also provided with a plurality of positioning grooves (13), and the plurality of positioning grooves (13) are cross-arranged.
7. The pericardiocentesis device according to claim 1, characterized in that: The outer peripheral wall of the sleeve (3) is provided with scales for indicating length.
8. The pericardiocentesis device according to claim 1, characterized in that: When the needle (2) penetrates the sleeve (3) and the syringe (4) abuts against the needle (2) assembly, the upper end of the needle (2) protrudes from the upper end of the sleeve (3).
9. The pericardiocentesis device according to claim 1, characterized in that: The outer peripheral wall of the needle head (2) assembly is provided with a first separation plate (64) extending along the second direction, and the outer peripheral wall of the syringe (4) is provided with a second separation plate (41) extending along the second direction.
10. The pericardiocentesis device according to claim 1, characterized in that: The inner wall of the through hole (11) and the inner wall of the clamping groove (12) are smoothly transitioned via an arc-shaped wall segment.