Pneumoperitoneum needle

Abstract

The invention belongs to the field of medical instruments, and discloses a pneumoperitoneum needle which comprises a needle tube and a protection tube, a needle tube channel matched with the needle tube is arranged in the needle tube, the two ends, facing the needle tube, of the needle tube channel are open, the protection tube is movably inserted into the needle tube channel through a protection tube spring, and a protection tube channel matched with the protection tube is arranged in the protection tube. The buckle slides on the needle tube in advance and is fixed, when the needle tube is punctured into the skin and the lower surface of the buckle is in contact with the skin, puncturing is in place, and the situation that visceral organs are damaged due to too deep puncturing is prevented; under the condition that safety is guaranteed, after the tip of the needle core punctures muscular tissue and peritoneum, the protection tube rapidly stretches out of the needle tube due to the fact that the peritoneum is relieved through pressure and the protection tube spring is released and extends, the protection tube closing-in part pushes away soft visceral organs and penetrates through muscle and fascia tissue, the protection tube closing-in part wraps the needle core, and the protection tube is not prone to falling off. The depth of the point of the needle core puncturing muscle and fascia tissue is confirmed by the position of the buckle on the needle tube, and the double visceral organ protection function is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of medical devices, and particularly relates to a pneumoperitoneum needle. Background Art

[0002] When performing laparoscopic surgery, for safety reasons, it is usually necessary to first use a metal pneumoperitoneum needle to puncture into the abdominal cavity and inject a certain amount of carbon dioxide to establish a pneumoperitoneum. Subsequently, a puncture trocar is used to pierce the abdominal wall muscle tissue and peritoneum, and professional instruments are used for the surgery through the puncture trocar channel.

[0003] When using a pneumoperitoneum needle to establish a pneumoperitoneum, due to over-reliance on the operator's hand feeling factor during puncture and uncertainty about the appropriate depth of the puncture site, there are risks such as damaging internal organs by puncturing too deep or being unable to establish a pneumoperitoneum due to improper puncture.

[0004] In addition, after retrieval, the publication number is CN112155686A, which discloses a pneumoperitoneum needle. Specifically, the end of the outer needle has a tip for contacting the human skin and piercing the human skin to insert into the abdominal cavity; the end of the inner needle has an air hole, and the air hole communicates with the air cavity. After the inner needle extends out of the outer needle, the air hole leaks out and enters the abdominal cavity. By inflating the air cavity through an inflation component, gas can enter the abdominal cavity to make the abdominal cavity full.

[0005] However, in the above solution, due to the tip provided at the end of the outer needle, it is easy to damage the muscle and fascia tissues in the abdominal cavity due to operation problems, and seriously, it may endanger life. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides a pneumoperitoneum needle, aiming to protect the muscle and fascia tissues in the abdominal cavity through the cooperation of a protection tube and a needle core. Also, because the end of the needle core has a needle core tip, during the process of piercing into the abdominal cavity, due to the buckle limit and the rounded corner on the protection tube compared with the sharp part on the protection tube in the prior art, it can better protect the abdominal cavity organ tissues. The needle core tip on the needle core can more easily penetrate the muscle and fascia tissues than the needle tube tip in the prior art while ensuring safety.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A pneumoperitoneum needle includes a needle tube, which has a needle tube channel matching the needle tube, and the needle tube channel is open at both ends of the needle tube. It also includes,

[0009] A protection tube is movably inserted into the needle tube channel through a protection tube spring. The protection tube has a protection tube channel matching the protection tube, and the protection tube channel is open at both ends of the protection tube;

[0010] The stylet is inserted into the protection tube along the protection tube channel through the activity of the stylet spring, and the direction of inserting the stylet into the protection tube channel is taken as the activity direction; and the end of the stylet along the activity direction has a stylet tip, and the end of the protection tube along the activity direction has a protection tube closing part. When pressing the stylet spring along the activity direction A, the stylet and the protection tube move along the activity direction in the needle tube;

[0011] The buckle is slidably fitted on the outer wall of the needle tube;

[0012] There is a scale block on the end side wall of the needle tube extending along the activity direction A.

[0013] Preferably, the end of the needle tube after extending in the reverse direction of the activity direction is taken as the needle tube end, and the end of the stylet after extending to the outside of the needle tube in the reverse direction of the activity direction is taken as the stylet end. The stylet is sleeved with a stylet spring, and the two end parts of the stylet spring are respectively detachably and fixedly connected with the needle tube end and the stylet end.

[0014] Further, the stylet spring is a tension spring. Spring mounting posts are provided on the side wall of the needle tube end and the side wall of the stylet end, and the hooks on both ends of the tension spring are respectively hung on the two spring mounting posts.

[0015] Preferably, when both the stylet spring and the protection tube spring are in the normal state, at this time, the stylet tip and the protection tube closing part are both located in the needle tube channel, and the stylet tip is located inside the protection tube closing part;

[0016] When pressing the stylet end, the stylet moves in the activity direction. Since the pressure of pressing the stylet is greater than the resistance of the muscle to the protection tube, it drives the protection tube to move in the activity direction until the lower surface of the buckle contacts the outer skin and the movement stops. At this time, the stylet spring is in a compressed state, and the protection tube spring is in an extended state. When the stylet spring is completely compressed, at this time, the stylet tip and the protection tube closing part both extend out of the needle tube, and the stylet tip is located inside the protection tube closing part;

[0017] When continuing to press the stylet end, the stylet moves in the activity direction. Since the pressure of pressing the stylet is less than the resistance of the muscle to the protection tube, at this time, the protection tube is subjected to resistance and moves in the reverse direction of the activity direction, and the stylet spring is in a compressed state, and the protection tube spring is in a compressed state. When the stylet spring is completely compressed, at this time, the stylet tip and the protection tube closing part still extend out of the needle tube, but the stylet tip extends out of the protection tube closing part along the activity direction.

[0018] Preferably, the pneumoperitoneum needle further includes,

[0019] A valve is installed on the needle tube, and the valve has a valve core. The valve core has a valve core channel. When rotating the valve to make the valve core channel correspond to the needle tube channel, the protection tube is inserted into the valve core channel.

[0020] Preferably, a fixing block is fixedly sleeved on the needle core. The end of the protection tube extending in the reverse direction of the moving direction A is connected to a moving block. A protection tube spring is also sleeved on the needle core, and two end parts of the protection tube spring are respectively connected to the fixing block and the moving block.

[0021] Preferably, the valve is a ball valve.

[0022] Preferably, both the fixing block and the moving block are cylindrical, and their diameters are the same and larger than the diameter of the valve core.

[0023] Preferably, the buckle includes a first buckle part and a second buckle part. The first buckle part has a first buckle part mating notch, and the second buckle part has a second buckle part mating notch. The first buckle part mating notch and the second buckle part mating notch cooperate to form a sliding mating part that mates with the needle tube.

[0024] Furthermore, the second buckle part further has a mounting position with a clamping hole, and the first buckle part has a connecting position provided with an elastic clamping member that matches the clamping hole. When the sliding mating part is slidably sleeved at a predetermined position on the needle tube, the elastic clamping member is clamped with the clamping hole.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. Since the pneumoperitoneum needle in the present invention includes a needle tube with a needle tube channel matching the needle tube inside, and the needle tube channel is open at both ends of the needle tube, a protection tube is movably inserted into the needle tube channel through a protection tube spring and extends along the moving direction. A protection tube channel matching the protection tube is provided inside the protection tube, and the protection tube channel is open at both ends of the protection tube; a needle core is movably inserted into the protection tube along the protection tube channel through a needle core spring, and the direction of inserting the needle core into the protection tube channel is taken as the moving direction; and the end of the needle core along the moving direction has a needle core tip, and the end of the protection tube along the moving direction has a protection tube closing part. The needle core and the protection tube move along the moving direction in the needle tube; a buckle is slidably fitted on the outer wall of the needle tube, and a scale block is provided on the side wall of the end of the needle tube extending along the moving direction A. The purpose is to use the buckle to slide and fix on the needle tube in advance. When the needle tube penetrates into the skin, the position where the buckle slides on the needle tube is confirmed by using the scale block. When the lower surface of the buckle contacts the skin, the puncture is in place, so that the puncture depth can be set to prevent damage to organs caused by excessive puncture as much as possible; furthermore, compared with only using the tip of the needle tube to puncture the skin in the prior art, in the case of ensuring safety in the present invention, after the needle core tip pierces the muscle tissue and peritoneum, the protection tube is released due to the release of the pressure on the peritoneum, that is, the protection tube spring elongates, so that the protection tube quickly extends out of the needle tube. Thus, the protection tube closing part pushes the relatively soft organs away by extrusion, so that it is easy to penetrate the muscle and fascia tissues. In addition, the protection tube closing part wraps the needle core inside, and due to the limitation of the buckle, the depth of the needle core tip piercing the muscle and fascia tissues can be confirmed, so that it has the function of double protection of the safety of organs.

[0027] 2. Since the end of the needle tube after extending in the reverse direction of the moving direction is taken as the end of the needle tube in the present invention, and the end of the needle core after extending out of the needle tube in the reverse direction of the moving direction is taken as the end of the needle core, a needle core spring is sleeved outside the needle core, and the two ends of the needle core spring are detachably and fixedly connected to the end of the needle tube and the end of the needle core respectively. The purpose is to separate the needle core from the needle core spring, so that the needle core and the protection tube are drawn out of the needle tube in the reverse direction of the moving direction.

[0028] 4. Since a fixed block is fixedly sleeved on the needle core in the present invention, the end of the protection tube after extending in the reverse direction of the moving direction A is connected with a movable block, and a protection tube spring is also sleeved on the needle core, and the two ends of the protection tube spring are respectively connected with the fixed block and the movable block. The purpose is to draw out the needle core in the reverse direction of the moving direction after releasing the connection relationship between the pull spring and the pull spring mounting post. Thus, under the connection of the fixed block, the protection tube is also drawn out along with the needle core.

[0029] 5. Since the valve of the present invention is installed on the syringe needle, and the valve has a valve core with a valve core channel. When the valve is rotated so that the valve core channel corresponds to the syringe needle channel, the protective tube is also inserted into the valve core channel; and both the fixed block and the movable block are cylindrical, and their diameters are the same and larger than the diameter of the valve core. The purpose is that after an air chamber is established when the needle core and the protective tube cooperate, both the needle core and the protective tube are withdrawn in the reverse direction along the moving direction, and then an external device ventilates the air chamber through the valve core channel and the syringe needle channel. When the ventilation is completed, the knob on the valve is rotated so that the valve core channel is not connected to the syringe needle channel, that is, the air chamber is blocked.

[0030] 6. Since the buckle of the present invention includes a buckle part one and a buckle part two. The buckle part one has a buckle part one mating notch, and the buckle part two has a buckle part two mating notch. The buckle part one mating notch and the buckle part two mating notch cooperate to form a sliding mating part that mates with the syringe needle. It has: The buckle part two also has a mounting position with a clamping hole, and the buckle part one has a connection position with an elastic clamping part that matches the clamping port. When the sliding mating part slides and sleeves on a predetermined position of the syringe needle, the elastic clamping part is clamped with the clamping hole. The purpose is to use the cooperation of the buckle part one mating notch and the buckle part two mating notch to form a sliding mating part that mates with the syringe needle and slides on the syringe needle. When it slides to the predetermined position, the elastic clamping part is snapped into the clamping hole, thereby limiting its position.

[0031] 7. Since the end side wall of the syringe needle of the present invention extending along the moving direction A has a scale block, the purpose is to determine the position of the buckle after moving along the moving direction or the reverse of the moving direction on the syringe needle, so that when the lower surface of the buckle contacts the skin after the pneumoperitoneum needle penetrates the skin, the depth at which the pneumoperitoneum needle penetrates into the pneumoperitoneum can be determined. Description of the Drawings

[0032] Figure 1 It is a schematic structural view of the present invention when the needle core spring is in a normal state. Among them, the enlarged view in this figure is the display view inside the syringe needle, that is, a schematic view of the state where both the protective tube and the needle core are located in the syringe needle channel, and the needle core is located inside the protective tube;

[0033] Figure 2 It is a schematic view of the state of the present invention when both the protective tube and the needle core are outside the syringe needle, and the needle core is located inside the protective tube. Among them, the enlarged view in this figure is the display view inside the syringe needle, that is, a schematic view of the state when the needle core spring is in a compressed state and the protective tube spring is in an extended state;

[0034] Figure 31 is a schematic diagram of the state in which the protection tube and the needle core are both outside the needle tube, and the needle core is outside the protection tube, wherein the enlarged view in the figure is a display view of the inside of the needle tube, that is, a schematic diagram of the state in which the needle core spring is in a compressed state and the protection tube spring is in a compressed state;

[0035] Figure 4 This is a schematic diagram of the positional relationship between the ball valve core and the protection tube of the present invention;

[0036] Figure 5 It is a schematic diagram of the state when the valve core channel is connected with the needle tube channel after the needle core, the needle core spring, the protection tube, the protection tube spring, the movable block and the fixed block are pulled out of the present invention;

[0037] Figure 6 It is a schematic diagram of the state when the valve core channel and the needle tube channel are blocked after the needle core, the needle core spring, the protection tube, the protection tube spring, the movable block and the fixed block are pulled out of the present invention;

[0038] Figure 7 An exploded view of the present invention;

[0039] In the figure: needle core spring 1; valve 2; valve core 21; buckle 3; buckle part 31; buckle part 1 matching notch 311; buckle part 2 32; clamping piece 33; needle tube 4; scale block 5; protection tube 6; protection tube closing part 61; movable block 7; needle core end 8; fixed block 9; protection tube spring 10; needle core 11; needle core tip 111. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments and accompanying drawings specifically illustrate the technical solutions of the present invention. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0041] like Figure 1 As shown, a Veress needle comprises a needle tube 4, wherein the needle tube 4 has a needle tube channel matching the needle tube 4, and the needle tube channel is open at both ends of the needle tube.

[0042] The protection tube 6 is movably inserted into the needle tube channel through the protection tube spring 10, and the protection tube 6 has a protection tube channel matching the protection tube 6, and the protection tube channel is open along both ends of the protection tube 6;

[0043] The stylet 11, and the stylet 11 is inserted into the protection tube 6 through the stylet spring 1 along the protection tube channel. The direction of inserting the stylet 11 into the protection tube is defined as the moving direction A. The end of the stylet 11 along the moving direction A has a stylet tip 111, and the end of the protection tube 6 along the moving direction A has a protection tube closing part 61. When pressing the stylet spring 11 along the moving direction A, the stylet 11 and the protection tube 6 move along the moving direction A in the needle tube 4;

[0044] The buckle 3 is slidably fitted on the outer wall of the needle tube 4.

[0045] The end of the needle tube 4 after extending reversely along the moving direction A is defined as the needle tube end, and the end of the stylet 11 after extending reversely along the moving direction A outside the needle tube 4 is defined as the stylet end 8. A stylet spring 1 is sleeved outside the stylet 11, and the two end parts of the stylet spring 1 are respectively connected to the needle tube end and the stylet end 8. More specifically, the stylet spring 1 is a tension spring. Spring mounting posts (not shown in the figure) are provided on the side walls of the needle tube 4 end and the stylet 11 end, and the hooks on the two ends of the tension spring are respectively hung on the two spring mounting posts.

[0046] When both the stylet spring 1 and the protection tube spring 10 are in the normal state, at this time, the stylet tip 111 and the protection tube closing part 61 are both located in the needle tube channel, and the stylet tip 111 is located inside the protection tube closing part 61 (as Figure 1 shown);

[0047] When pressing the stylet end 8, the stylet 11 moves towards the moving direction A. Since the pressure for pressing the stylet 11 is greater than the resistance of the muscle to the protection tube 6 (it should be noted that the direction of pressing the stylet 11 is along the moving direction A, and the direction of the resistance of the muscle to the protection tube 6 is the reverse of the moving direction A), it drives the protection tube 6 to move towards the moving direction A until the lower surface of the buckle 3 contacts the outer skin and the movement stops. At this time, the stylet spring 1 is in the compressed state, and the protection tube spring 10 is in the stretched state. When the stylet spring 1 is completely compressed, at this time, the stylet tip 111 and the protection tube closing part 61 both extend out of the needle tube 11, and the stylet tip 111 is located inside the protection tube closing part 61 (as Figure 2 shown);

[0048] When continuing to press the stylet end 8, the stylet 11 moves towards the moving direction A. Since the pressure for pressing the stylet 11 is less than the resistance of the muscle to the protection tube 6, at this time, the protection tube 6 is subjected to the resistance and moves reversely towards the moving direction A, and the stylet spring 1 is in the compressed state, and the protection tube spring 10 is in the compressed state. When the stylet spring 1 is completely compressed, at this time, the stylet tip 111 and the protection tube closing part 61 still extend out of the needle tube 11, but the stylet tip 111 extends out of the protection tube closing part 61 along the moving direction A (as Figure 3 shown).

[0049] The insufflation needle further includes,

[0050] a valve 2, installed on the needle tube 11, and the valve 2 has a valve core 21, the valve core 21 has a valve core channel, when the valve 2 is rotated to make the valve core channel correspond to the needle tube channel, the protection tube 6 is inserted into the valve core channel (as Figure 4 shown).

[0051] A fixing block 9 is fixedly sleeved on the needle core 11, the end of the protection tube 6 extending in the reverse direction of the moving direction A is connected to the moving block 7, a protection tube spring 10 is also sleeved on the needle core 11, and the two ends of the protection tube spring 10 are respectively connected to the fixing block 9 and the moving block 7;

[0052] After the connection relationship between the tension spring and the tension spring mounting post is released, the needle core 11 is withdrawn in the reverse direction of the moving direction A, so that under the connection of the fixing block 9, the protection tube 6 is also withdrawn in the reverse direction of the moving direction A along with the needle core 11, wherein, as Figure 5 shown, the protection tube 6, the protection tube spring 10, the needle core 1, the fixing block 9, and the moving block 7 have been withdrawn from the needle tube 4.

[0053] The valve 2 is a ball valve, and both the fixing block 9 and the moving block 7 are cylindrical, and their diameters are the same and larger than the diameter of the valve core 21. As Figure 6 shown, after the air chamber is established when the needle core 11 and the protection tube 6 cooperate, the needle core 11 and the protection tube 6 are both withdrawn in the reverse direction of the moving direction A, and then the external device is used to ventilate the abdominal cavity through the valve core channel and the needle tube channel. (Here, in order to enable the external device to ventilate the needle tube channel better, a joint is provided at the end of the needle tube. One end of the joint should match the needle tube channel, and the other end should match the ventilation tube of the external device (not shown in the figure)); specifically: when the ventilation is completed, the knob on the valve 2 is rotated to make the valve core channel not communicate with the needle tube channel, that is, to block the air chamber.

[0054] As Figure 7 shown, the buckle 3 includes a buckle part 31 and a buckle part 32. The buckle part 31 has a buckle part mating notch 311, and the buckle part 32 has a buckle part mating notch. The buckle part mating notch and the buckle part mating notch cooperate to form a sliding mating part that mates with the needle tube 4.

[0055] The second buckle part 32 also has a mounting position with a clamping hole, and the first buckle part has a connecting position with an elastic clamping member 33 matching the clamping port. When the sliding fitting part slides and sleeves on a predetermined position of the needle tube, the elastic clamping member 33 is clamped with the clamping hole. With the above solution, the purpose is to use the fitting groove 311 of the first buckle part and the fitting groove of the second buckle part to cooperate to form a sliding fitting part cooperating with the needle tube 4 to slide on the needle tube 1. When sliding to the predetermined position, the elastic clamping member 33 (such as plastic, etc.) can be clamped into the clamping hole to limit its position;

[0056] As Figure 1 shown, the end side wall of the needle tube 4 extending along the moving direction A has a scale block 5.

[0057] The present invention operates in the following manner:

[0058] This design is a 14G metal puncture needle (it should be noted that G is a unit in the medical industry, indicating that the outer diameter of the puncture needle is 2.10 mm);

[0059] Before the operation, the puncture point (usually around the umbilicus) can be measured through imaging data such as abdominal CT plain scan, with a predetermined thickness of X cm. Slide the buckle 3 on the needle tube 4 to a position of X + 0.5 - 1 cm and fix it (calibrated by the scale block 5). After using a towel clamp to lift the tissues on both sides of the puncture point, press the end of the needle core 8 to perform puncture, so that the tip of the needle core 111 can make the puncture needle more smoothly break through the muscle and fascia tissues. The buckle 3 can prevent the puncture needle from suddenly falling empty after entering the retroperitoneum and causing too deep puncture to damage the viscera. Specifically: use the fitting groove 311 of the first buckle part and the fitting groove of the second buckle part to cooperate to form a sliding fitting part cooperating with the needle tube 4 to slide on the needle tube 1. When sliding to the predetermined position, the elastic clamping member 33 (such as plastic, etc.) can be clamped into the clamping hole to limit its position;

[0060] After the puncture is completed, after disconnecting the connection between the tension spring and the tension spring mounting post, pull out the needle core 11 in the reverse direction of the moving direction A. Thus, under the connection of the fixing block 9, the protection tube 6 is also pulled out in the reverse direction of the moving direction A along with the needle core 11. At this time, turn the knob on the valve 2 so that the valve core channel on the valve core 21 is not connected to the needle tube channel, that is, use the valve core 21 to block the needle tube channel, as Figure 6 shown; then open the ball valve to connect the valve core channel in the valve core 21 to the needle tube 4 channel, then insert the syringe into the needle tube channel through the end of the needle tube, and then push the piston on the syringe. When the normal saline in the syringe flows smoothly, it represents a successful puncture, and then the pneumoperitoneum tube can be connected to inject gas.

[0061] The above embodiments are preferred cases of the present invention and are not used to limit the protection scope of the present invention. Various modifications or variations that can be made by those of ordinary skill in the art without creative efforts within the scope of the appended claims still fall within the protection scope of this patent.

Claims

1. A Veress needle, comprising a needle tube, wherein the needle tube has a needle tube channel matching the needle tube, and the needle tube channel is open at both ends of the needle tube, characterized in that: Also includes, A protection tube is inserted into the needle tube channel by a protection tube spring, wherein the protection tube has a protection tube channel matching the protection tube, and the protection tube channel is open along both ends of the protection tube; The needle core is inserted into the protective tube along the protective tube channel by the movement of the needle core spring, and the direction in which the needle core is inserted into the protective tube channel is taken as the movement direction; and the end of the needle core along the movement direction has a needle core tip, and the end of the protective tube along the movement direction has a protective tube closing portion, and when the needle core spring is pressed along the movement direction, the needle core and the protective tube move in the needle tube along the movement direction; A buckle, slidably fitted on the outer wall of the needle tube; A scale block is provided on the side wall of the end of the needle tube extending along the moving direction.

2. The Veress needle according to claim 1, characterized in that: The end of the needle tube after extending in the opposite direction of the movement direction is used as the needle tube end, and the end of the needle core after extending in the opposite direction of the movement direction to the outside of the needle tube is used as the needle core end. The needle core outer sleeve is connected with a needle core spring, and the two end ends of the needle core spring are respectively detachably fixedly connected to the needle tube end and the needle core end.

3. The Veress needle according to claim 1, characterized in that: When the needle core spring and the protection tube spring are both in a normal state, the needle core tip and the protection tube closing portion are both located in the needle tube channel, and the needle core tip is located inside the protection tube closing portion; When the end of the needle core is pressed, the needle core moves in the active direction. Since the pressure of pressing the needle core is greater than the resistance of the muscle to the protective tube, the protective tube is driven to move in the active direction, and the needle core spring is in a compressed state, and the protective tube spring is in an extended state. When the needle core spring is fully compressed, the needle core tip and the protective tube closing part both extend out of the needle tube, and the needle core tip is located inside the protective tube closing part. When the end of the needle core continues to be pressed, the needle core moves in the active direction. Since the pressure pressing the needle core is less than the resistance of the muscle to the protective tube, the protective tube moves in the opposite direction of the active direction due to the resistance until the lower surface of the buckle contacts the outer skin and the movement stops. At this time, the needle core spring is in a compressed state, and the protective tube spring is in a compressed state. When the needle core spring is completely compressed, the needle core tip and the protective tube closing part still extend out of the needle tube, but the needle core tip extends out of the protective tube closing part along the active direction.

4. The Veress needle according to claim 3, characterized in that: A fixed block is fixedly sleeved on the needle core, the end of the protection tube extending in the opposite direction of the moving direction is connected to the moving block, and a protection tube spring is also sleeved on the needle core, and the two end portions of the protection tube spring are respectively connected to the fixed block and the moving block.

5. The Veress needle according to claim 4, characterized in that: Also includes, The valve is installed on the needle tube, and the valve has a valve core, and the valve core has a valve core channel. When the valve is rotated to make the valve core channel correspond to the needle tube channel, the protection tube is inserted into the valve core channel.

6. The Veress needle according to claim 5, characterized in that: The fixed block and the movable block are both cylindrical, and their diameters are the same and larger than the diameter of the valve core.

7. The Veress needle according to claim 1, characterized in that: The buckle includes a first buckle part and a second buckle part. The first buckle part has a buckle part matching notch, and the second buckle part has a buckle part matching notch. The buckle part matching notch and the buckle part matching notch match the form a sliding matching part that matches the needle tube.

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