An improved rapid deep vein puncture and catheterization kit

Abstract

This invention relates to an improved rapid deep vein puncture and catheterization kit, belonging to the technical field of venous puncture medical equipment. It includes a syringe, with a pre-hole located inside and coaxial with the syringe piston rod. Two mounting barrels are symmetrically embedded in the inner wall of the syringe's output port and communicate with its interior. Two first sliders are embedded inside the mounting barrels and flush with their openings. Two connecting rods are symmetrically inserted through the syringe's input port. Two first arc-shaped clamps are symmetrically positioned on the side of the pre-hole near the connecting rods. This invention, by pre-placing a guidewire in the pre-hole, allows the guidewire to be directly inserted into the vein along the needle. If the guidewire deviates and punctures an artery during insertion, the first arc-shaped clamps quickly clamp and fix the guidewire, stopping the insertion operation promptly. This avoids the need for medical personnel to deliberately and slowly insert the guidewire while constantly monitoring its position, thus improving the efficiency of deep vein puncture and catheterization.

Description

Technical Field

[0001] This invention belongs to the field of intravenous puncture medical device technology, specifically relating to an improved rapid deep vein puncture and catheterization kit. Background Technology

[0002] Central venous catheterization is an essential means of establishing intravenous access for critically ill patients. It is one of the most effective methods for monitoring central venous pressure, administering intravenous fluids, blood transfusions, hemodialysis, and providing total parenteral nutrition in critically ill patients, those undergoing major surgery, and those with chronic wasting diseases. Due to its advantages such as long retention time, simple operation, wide range of infusion types, and good catheter elasticity, it is now widely used in clinical practice. The purpose of central venous catheterization is to: understand the comprehensive status of effective blood volume, cardiac function, and peripheral circulatory resistance; differentiate unexplained acute circulatory failure; and, when large amounts of blood transfusion or fluid resuscitation are required, to observe dynamic changes in blood volume and the risk of circulatory overload.

[0003] Deep vein catheterization is the procedure of inserting a deep vein catheter through a puncture site into a corresponding vein. Commonly used deep veins include the femoral vein, internal jugular vein, or subclavian vein. Because deep veins are often located adjacent to arteries, medical personnel must avoid accidentally puncturing an artery during deep vein puncture. If an artery is accidentally punctured and the procedure is not stopped immediately, it can lead to hematoma, massive bleeding during catheter removal, and even death, often requiring surgical / interventional repair of the artery, increasing patient mortality.

[0004] Medical personnel typically begin with a small syringe for blind puncture. Once blood returns to the syringe, it is removed. The color and speed of the blood return are used to determine if the blood is venous. After confirming that the needle is in a vein, a larger syringe is used to re-puncture at the blind puncture site. After blood returns to the larger syringe, it is confirmed that the needle is inside the vein. The guidewire is then slowly inserted into the vein along the syringe and needle, while constantly observing the color of the blood return and using experience to check for any deviation of the guidewire from puncturing an artery. Once the guidewire has been successfully inserted, the syringe is manually withdrawn, and the catheter is placed into the vein along the guidewire. Finally, the vein is secured and sutured. Because medical personnel performing deep vein puncture and catheterization not only need to use a syringe to perform two punctures and determine whether the needle is inside the vein, making the process complex, cumbersome, and time-consuming, but also need to avoid puncturing the artery when inserting the guidewire. If the insertion is not stopped in time, medical personnel need to deliberately slow down the insertion speed, which not only affects the efficiency of deep vein puncture, but also, because the blood color changes slowly after puncturing the artery, it is impossible to stop the insertion of the guidewire in time, leading to serious medical accidents. Summary of the Invention

[0005] In view of this, the present invention provides an improved rapid deep vein puncture and catheterization kit to address the shortcomings of the prior art.

[0006] The technical solution of this invention is: an improved rapid deep vein puncture and catheterization kit, comprising a syringe, a pilot hole, two mounting barrels, two first sliders, two connecting rods, two first arc-shaped clamping plates, and a transmission mechanism; the pilot hole is opened inside the piston rod of the syringe and is coaxial with it, the pilot hole passes through the piston of the syringe and communicates with the interior of the syringe; the two mounting barrels are respectively symmetrically embedded in the inner wall of the output port of the syringe and communicate with its interior, the central axes of the mounting barrels and the pilot hole are perpendicular to each other, and the mounting barrels are fixedly connected to the syringe; the two first sliders are respectively embedded in the interior of the mounting barrels and are flush with their openings, the first sliders are slidably sealed to the mounting barrels; the two connecting rods are respectively symmetrically inserted through one side of the input port of the syringe, the connecting rods are parallel to the central axes of the mounting barrels, the connecting rods are slidably connected to the syringe and extend through the piston rod of the syringe into the pilot hole; the two first arc-shaped clamping plates are respectively symmetrically arranged on the side of the pilot hole near the connecting rod, the outer side of the first arc-shaped clamping plates is connected to the connecting rod; the transmission mechanism is provided on the syringe and is used to realize the movement of the connecting rods by driving the first sliders.

[0007] Preferably, the transmission mechanism includes a transmission chamber formed in the inner wall of the syringe. A telescopic rod passes through the transmission chamber between the connecting rod and the mounting barrel. The middle part of the telescopic rod is hinged to the inner wall of the transmission chamber via a pin. One end of the telescopic rod is hinged to the connecting rod. Two sliding rods are symmetrically passed through the mounting barrel at the distal ends of the two first sliders. One end of the sliding rod is vertically fixedly connected to the first slider, and the other end extends through the mounting barrel into the interior of the transmission chamber. A first spring is also provided inside the mounting barrel. One end of the first spring is connected to the bottom of the mounting barrel, and the other end is connected to the first slider. An L-shaped connecting rod is provided at the other end of the telescopic rod. One end of the L-shaped connecting rod is hinged to the telescopic rod, and the other end is vertically fixedly connected to the sliding rod.

[0008] Preferably, the syringe output port is provided with an annular groove on the side of the mounting barrel near the lead hole. A connecting ring is passed through the annular groove and is coaxial with it. The outer side of the connecting ring is slidably sealed to the inner wall of the annular groove. Its inner side is a conical surface. The diameter of the conical surface near the through hole is larger than the diameter of the other end. A connecting hose with an L-shaped cross-section is passed through the side of the annular groove near the through hole. One edge of the connecting hose is perpendicularly fixed to the inner wall of the annular groove, and the other end extends into the inner side of the connecting ring.

[0009] Preferably, the connecting ring has a column on the side near the connecting hose. One end of the column is vertically fixed to the connecting ring, and the other end passes through the connecting hose and is slidably sealed to it. The end of the column away from the connecting ring is flush with the end face of the annular groove.

[0010] Preferably, the syringe has an annular connecting plate on its inlet and is coaxial with it. One side of the annular connecting plate is fixedly connected to the syringe perpendicularly. The annular connecting plate has two through holes symmetrically opened inside. The connecting rod passes through the through holes and is slidably connected to them. The telescopic rod extends into the through holes and is hinged to the connecting rod. The syringe piston rod has two through first grooves symmetrically opened on both sides near the through holes. The connecting rod passes through the first grooves, extends into the lead hole, and is fixedly connected to the first arc-shaped clamping plate perpendicularly. The end of the connecting rod away from the first arc-shaped clamping plate extends out of the through hole and is fixedly connected to an annular limiting plate.

[0011] Preferably, the lead hole is located on the side of the syringe piston away from the first arc-shaped retaining plate, and a rubber ring is embedded therein. The rubber ring is coaxial with the lead hole and fixedly connected to its inner wall.

[0012] Preferably, the piston handle of the syringe is symmetrically provided with two second arc-shaped retaining plates on the side away from the connecting rod. Two connecting rods are symmetrically provided between the second arc-shaped retaining plates and the piston handle of the syringe. One end of the connecting rod is hinged to the outer side of the second arc-shaped retaining plate, and the other end is slidably connected to the piston handle of the syringe. A through groove is provided on the connecting rod along its length direction. A guide rod passes through the through groove and is slidably connected to it. One end of the guide rod is vertically fixedly connected to the piston handle of the syringe, and the other end is fixedly provided with a retaining block. A second spring is sleeved on the guide rod between the connecting rod and the piston handle of the syringe.

[0013] Preferably, the piston handle of the syringe has two symmetrically formed T-shaped grooves on its outer side, and a second slider is embedded in each T-shaped groove and slidably connected thereto. The end of the connecting rod away from the second arc-shaped plate is hinged to the second slider.

[0014] Compared with existing technologies, this invention provides an improved rapid deep vein puncture and catheterization kit. A guidewire is pre-placed through the inlet of the syringe. After puncture, the color of the blood return in the syringe indicates whether it is a vein. The guidewire can then be directly inserted into the vein along the needle. Furthermore, through the use of a mounting bucket and a first slider, the kit can sense the blood pressure at the syringe tip. If the guidewire deviates during insertion and punctures an artery, the blood pressure from the return blood synchronously drives the connecting rod and the first arc-shaped clamp to quickly and firmly hold the guidewire, stopping the insertion and reducing the risk of arterial puncture. This provides accurate and stable catheterization for medical personnel. Certain protective measures are provided to prevent medical personnel from deliberately and slowly inserting the guidewire while constantly monitoring its position, thus improving the efficiency of deep vein puncture and catheterization. The transmission mechanism, consisting of a telescopic rod, sliding rod, first spring, and L-shaped connecting rod, works in conjunction to allow the first sliding block to move laterally after the guidewire pierces the artery. This, in turn, causes the connecting rod to move inward via the hinged telescopic rod, using the first arc-shaped clamp to hold and fix the guidewire, quickly stopping its insertion. The operator can then confirm whether the artery has been pierced based on the guidewire's position, providing the most effective support for deep vein puncture and catheterization, eliminating the need for medical personnel to deliberately lower the guidewire. The speed of insertion further improves the efficiency of deep vein puncture and catheterization. Through the connection ring on the annular groove, which works in conjunction with the connecting tubing, when medical personnel use a syringe needle for puncture, if the needle punctures an artery, the pressure or speed of blood return in the syringe fluctuates and increases. This causes the connection ring to move towards the connecting tubing and squeeze it, sealing the annular channel between the guidewire and the connecting tubing. This not only prevents further blood return at the puncture site but also allows medical personnel to promptly detect whether an artery has been punctured, preventing more serious medical accidents caused by a lack of timely detection of needle puncture. The connection ring's post and the syringe... The piston of the syringe is used in conjunction with the device, allowing medical operators to separate the connecting tubing from the connecting ring before each operation, further improving ease of use. The rubber ring, in conjunction with the inlet hole, not only seals the piston to prevent backflow and leakage from the syringe, but also allows for compatibility with guidewires of different diameters, further enhancing usability. The second arc-shaped locking plate, in conjunction with the connecting rod and the guide rod on the through groove, allows medical operators to press the two arc-shaped locking plates, guiding the guidewire at a uniform speed, further improving the stability of guidewire insertion. This invention's deep vein puncture and catheterization kit is convenient to use, highly efficient, and practical, making it worthy of widespread adoption. Attached Figure Description

[0015] Figure 1 This is a front view of the present invention;

[0016] Figure 2 This is a side view of the present invention;

[0017] Figure 3 This is a cross-sectional view of the present invention (AA section).

[0018] Figure 4 This is an enlarged schematic diagram of section B of the present invention. Detailed Implementation

[0019] This invention provides an improved rapid deep vein puncture and catheterization kit, which is described below in conjunction with... Figures 1 to 4 The present invention is illustrated by the structural diagram shown below.

[0020] Example 1

[0021] like Figure 1 As shown, an improved rapid deep vein puncture and catheterization kit includes a syringe 1, a pilot hole 2, two mounting barrels 3, two first sliders 4, two connecting rods 5, two first arc-shaped clamping plates 6, and a transmission mechanism. The pilot hole 2 is located inside the piston rod of the syringe 1 and is coaxial with it. The pilot hole 2 passes through the piston of the syringe 1 and communicates with the interior of the syringe 1. The two mounting barrels 3 are symmetrically embedded in the inner wall of the output port of the syringe 1 and communicate with its interior. The central axes of the mounting barrels 3 and the pilot hole 2 are perpendicular to each other. The mounting barrels 3 are fixedly connected to the syringe 1. The two first sliders 4 are respectively embedded inside the mounting barrels 3 and are flush with their openings. The first sliders 4 are slidably sealed to the mounting barrels 3. The two connecting rods 5 are symmetrically inserted on one side of the input port of the syringe 1. The connecting rods 5 are parallel to the central axes of the mounting barrels 3. The connecting rods 5 are slidably connected to the syringe 1 and extend through the piston rod of the syringe 1 into the pilot hole 2. The two first arc-shaped clamping plates 6 are respectively... Symmetrically positioned on the side of the inlet 2 near the connecting rod 5, the outer side of the first arc-shaped clamping plate 6 is connected to the connecting rod 5. A guidewire is pre-placed through the inlet inside the syringe. After puncture, the color of the blood return in the syringe indicates whether it is a vein. The guidewire can then be directly inserted into the vein along the needle. Furthermore, the mounting bucket and the first slider work together to sense the blood pressure at the syringe tip. If the guidewire deviates during insertion and punctures an artery, the blood pressure from the return blood synchronously drives the connecting rod and the first arc-shaped clamping plate to quickly and firmly clamp and fix the guidewire, stopping the insertion and reducing the risk of arterial puncture. This provides accurate and stable protection for medical personnel during puncture and catheterization, avoiding the need for slow insertion and constant monitoring of the guidewire's position, thus improving the efficiency of deep vein puncture and catheterization. The transmission mechanism is located on the syringe 1 and is used to drive the connecting rod 5 to move via the first slider 4.

[0022] like Figure 4As shown, preferably, the transmission mechanism includes a transmission chamber 21 formed in the inner wall of the syringe 1. A telescopic rod 22 passes through the transmission chamber 21 between the connecting rod 5 and the mounting barrel 3. The middle part of the telescopic rod 22 is hinged to the inner wall of the transmission chamber 21 by a pin. One end of the telescopic rod 22 is hinged to the connecting rod 5. Two sliding rods 23 are symmetrically inserted through the mounting barrel 3 at the distal ends of the two first sliders 4. One end of the sliding rod 23 is vertically fixed to the first slider 4, and the other end extends through the mounting barrel 3 into the interior of the transmission chamber 21. A first spring 24 is also provided inside the mounting barrel 3. One end of the first spring 24 is connected to the bottom of the mounting barrel 3, and the other end is connected to the first slider 4. The other end of the telescopic rod 22 has an L-shaped... The connecting rod 25, an L-shaped rod, is hinged at one end to the telescopic rod 22 and vertically fixed to the slide rod 23 at the other end. Through the cooperation of the telescopic rod, slide rod, first spring, and L-shaped connecting rod in the transmission mechanism, after the guidewire is inserted into the artery, the pressure of the arterial blood drives the first slider to move outward, which in turn drives the connecting rod to move inward through the hinged telescopic rod. The first arc-shaped clamping plate holds and fixes the guidewire, allowing the guidewire to stop quickly. The operator can then confirm whether the artery has been punctured based on the status of the guidewire, providing the most effective support for medical personnel to perform deep vein puncture and catheterization. This eliminates the need for medical personnel to deliberately slow down the guidewire insertion speed, further improving the efficiency of deep vein puncture and catheterization.

[0023] like Figure 3 As shown, preferably, the syringe 1 has an annular connecting plate 51 on its input port and is coaxial with it. One side of the annular connecting plate 51 is fixedly connected to the syringe 1 perpendicularly. The annular connecting plate 51 has two through holes 52 symmetrically opened inside. The connecting rod 5 passes through the through holes 52 and is slidably connected to them. The telescopic rod 22 extends into the through holes 52 and is hinged to the connecting rod 5. The piston rod of the syringe 1 has two through first grooves 53 symmetrically opened on both sides near the through holes 52. The connecting rod 5 passes through the first grooves 53 and extends into the lead hole 2 and is fixedly connected to the first arc-shaped clamping plate 6 perpendicularly. The end of the connecting rod away from the first arc-shaped clamping plate 6 extends out of the through hole 52 and is fixedly connected to an annular limiting plate 54.

[0024] Preferably, the lead hole 2 is located on the side of the piston of the syringe 1 away from the first arc-shaped retaining plate 6, and a rubber ring 61 is embedded therein. The rubber ring 61 is coaxial with the lead hole 2 and fixedly connected to its inner wall. By using the rubber ring in conjunction with the lead hole, not only can the piston be sealed to prevent blood from leaking out of the syringe, but it can also be adapted to guide wires of different diameters, further improving ease of use.

[0025] When establishing intravenous access for critically ill patients, medical personnel use this puncture and catheterization kit to perform deep vein puncture and catheterization. First, the guidewire is inserted through the syringe tail. The connecting rod is pressed near the second arc-shaped clamp, causing the proximal end of the connecting rod to move downwards along the guide rod. The second slider moves outwards on the T-shaped groove, moving the two second arc-shaped clamps towards the guidewire in the middle, gripping the guidewire and moving it into the insertion port. When one end of the guidewire protrudes from the needle, the medical personnel manually pull the other end of the guidewire, retracting it into the needle. Then, the syringe piston handle is pushed to separate the connecting ring from the connecting tubing. After selecting the puncture site and performing pre-operative procedures such as disinfection, the operator holds the syringe and inserts it into the patient's blood vessel through the needle, then slowly pulls... The piston rod of the syringe is moved, causing blood in the blood vessel to flow back into the syringe. When the blood flow is stable and the color is venous blood, the operator manually presses the connecting rod, which moves the guidewire into the blood vessel through the second arc-shaped clamp. When the guidewire is being inserted into the blood vessel, if it punctures an artery, the blood inside the syringe will have already flowed back in and filled the syringe. At this time, if the artery ruptures, the static pressure of the blood inside the syringe will increase, which will drive the first slider to move. The transmission mechanism will drive the first arc-shaped clamp to lock the guidewire. The medical operator can confirm whether the artery has been punctured based on the movement of the guidewire and take remedial measures for the patient. When the guidewire is inserted into the vein, one hand holds the end of the guidewire near the puncture point, and the other hand slowly pushes out the syringe. Then, the catheter is placed on the guidewire and evenly inserted into the vein along the guidewire before being fixed and sutured.

[0026] Example 2

[0027] To further improve the safety of deep vein puncture and catheterization, a connecting ring on the annular groove is used in conjunction with the connecting tubing. When medical personnel use a syringe needle for puncture, if the needle punctures an artery, the pressure or speed of blood return in the syringe fluctuates and increases. This causes the connecting ring to move towards the connecting tubing and squeeze it, sealing the annular channel between the guidewire and the connecting tubing. This not only prevents further blood return at the puncture site but also allows medical personnel to promptly know whether an artery has been punctured based on the blood return, preventing more serious medical accidents caused by the inability of medical personnel to know the needle puncture status in a timely manner.

[0028] Preferably, the output port of the syringe 1 is provided with an annular groove 31 on the side of the mounting barrel 3 near the lead hole 2. A connecting ring 32 is passed through the annular groove 31 and is coaxial with it. The outer side of the connecting ring 32 is slidably sealed to the inner wall of the annular groove 31. Its inner side is a conical surface. The diameter of the conical surface near the through hole is larger than the diameter of the other end. A connecting hose 33 with an L-shaped cross-section is passed through the side of the annular groove 31 near the through hole. One edge of the connecting hose 33 is vertically fixed to the inner wall of the annular groove 31, and the other end extends into the inner side of the connecting ring 32. When the needle is inserted into a vein, due to the low blood pressure and slow flow speed of the vein, it flows in through the gap between the connecting ring and the guide wire. When the artery is punctured, blood also enters the needle tube. When it passes through the gap between the connecting ring and the guide wire at a faster speed, the annular gap of the channel increases the pressure on the connecting ring, thereby pushing the connecting ring to move, thus sealing the internal channel of the needle tube and indicating the puncture of the vein.

[0029] Preferably, the connecting ring 32 has a column 41 on the side near the connecting hose 33. One end of the column 41 is vertically fixed to the connecting ring 32, and the other end passes through the connecting hose 33 and is slidably sealed to it. The end of the column 41 away from the connecting ring 32 is flush with the end face of the annular groove 31. The column on the connecting ring is used in conjunction with the piston of the syringe. Before each operation, the medical operator separates the connecting hose from the connecting ring by the piston, which further improves the convenience of use.

[0030] Example 3

[0031] To further improve the stability of deep vein puncture and catheterization guidewire insertion, a second arc-shaped clamp is used in conjunction with a connecting rod and a guide rod on the through groove. Medical personnel can insert the guidewire at a uniform speed by pressing the two second arc-shaped clamps.

[0032] like Figure 2 As shown, preferably, two second arc-shaped retaining plates 71 are symmetrically arranged on the side of the piston handle of the syringe 1 away from the connecting rod 5. Two connecting rods 72 are symmetrically arranged between the second arc-shaped retaining plates 71 and the piston handle of the syringe 1. One end of the connecting rod 72 is hinged to the outer side of the second arc-shaped retaining plate 71, and the other end is slidably connected to the piston handle of the syringe 1. A through groove 73 is opened on the connecting rod 72 along its length direction. A guide rod 74 passes through the through groove 73 and is slidably connected to it. One end of the guide rod 74 is vertically fixedly connected to the piston handle of the syringe 1, and the other end is fixedly provided with a retaining block 75. A second spring 76 is sleeved on the guide rod 74 between the connecting rod 72 and the piston handle of the syringe 1.

[0033] Preferably, two T-shaped grooves 81 are symmetrically provided on the outer side of the piston handle of the syringe 1. The second slider 82 is embedded in the T-shaped groove 81 and slidably connected thereto. The end of the connecting rod 72 away from the second arc-shaped plate 71 is hinged to the second slider 82.

[0034] The above-disclosed embodiments are merely preferred embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. An improved rapid deep venous puncture catheterization kit comprising a syringe (1), characterized in that, Also includes: A guide hole (2) is opened in the piston rod of the injector (1) and coaxial with it, the guide hole (2) penetrates the piston of the injector (1) and communicates with the inside of the injector (1); Two installation barrels (3) are respectively embedded on the inner wall of the output port of the injector (1) and communicate with each other, the central axis of the installation barrel (3) and the guide hole (2) are perpendicular to each other, and the installation barrel (3) is fixedly connected with the injector (1); Two first sliders (4) are respectively embedded in the inside of the installation barrel (3) and flush with the mouth part, the first slider (4) is slidingly connected with the installation barrel (3); Two connecting rods (5) are respectively embedded in the input port side of the injector (1), the connecting rod (5) and the central axis of the installation barrel (3) are parallel to each other, the connecting rod (5) is slidingly connected with the injector (1) and penetrates the piston rod of the injector (1) and extends into the guide hole (2); Two first arc-shaped clamping plates (6) are respectively arranged on the side of the guide hole (2) close to the connecting rod (5), the outer side of the first arc-shaped clamping plate (6) is connected with the connecting rod (5); A transmission mechanism is arranged on the injector (1), which is used to drive the connecting rod (5) to move through the first slider (4), and the blood is slowly passed through the gap between the connecting ring and the guide wire; The first slider (4) is driven to move outward by the pressure of the arterial blood, and then the connecting rod (5) is driven to move inward through the articulated extension rod, the first arc-shaped clamping plate (6) is used to tightly hold the guide wire, so that the guide wire is quickly stopped from being introduced.

2. The improved rapid deep vein puncture cannula kit according to claim 1, characterized in that, The transmission mechanism includes a transmission bin (21) opened in the inner wall of the injector (1), a telescopic rod (22) is arranged between the connecting rod (5) and the installation barrel (3), the middle part of the telescopic rod (22) is hinged with the inner wall of the transmission bin (21) through a pin shaft, one end of the telescopic rod (22) is hinged with the connecting rod (5), the installation barrel (3) is symmetrically provided with two slide rods (23) at the distal end of the two first sliders (4), one end of the slide rod (23) is fixedly connected with the first slider (4), the other end penetrates the installation barrel (3) and extends into the inside of the transmission bin (21), the inside of the installation barrel (3) is further provided with a first spring (24), one end of the first spring (24) is connected with the bottom of the installation barrel (3), the other end is connected with the first slider (4), the other end of the telescopic rod (22) is provided with an L-shaped connecting rod (25), one end of the L-shaped connecting rod (25) is hinged with the telescopic rod (22), the other end is fixedly connected with the slide rod (23).

3. The improved rapid deep vein puncture cannula kit according to claim 2, characterized in that, The output port of the injector (1) is located on the side of the installation barrel (3) close to the guide hole (2) and is provided with an annular groove (31), the annular groove (31) is provided with a connecting ring (32) penetrating and coaxial with the annular groove (31), the outer side of the connecting ring (32) is in sliding sealing connection with the inner wall of the annular groove (31), the inner side of the connecting ring (32) is a conical surface, the diameter of the one end of the conical surface close to the through hole is larger than the diameter of the other end, the side of the annular groove (31) close to the through hole is provided with a connecting hose (33) with L-shaped cross section, one end of the connecting hose (33) is in perpendicular fixed connection with the inner wall of the annular groove (31), the other end of the connecting hose (33) extends into the inner side of the connecting ring (32).

4. The improved rapid deep vein puncture cannula kit according to claim 3, characterized in that, The side of the connecting ring (32) close to the connecting hose (33) is provided with a stand (41), one end of the stand (41) is in perpendicular fixed connection with the connecting ring (32), the other end of the stand (41) penetrates the connecting hose (33) and is in sliding sealing connection with the connecting hose (33), the end of the stand (41) away from the connecting ring (32) is flush with the end surface of the annular groove (31).

5. The improved rapid deep vein puncture cannula kit according to claim 2, wherein The input port of the injector (1) is provided with an annular connecting plate (51) and is coaxial with the annular connecting plate (51), one side of the annular connecting plate (51) is in perpendicular fixed connection with the injector (1), two through holes (52) are symmetrically provided in the inner part of the annular connecting plate (51), the connecting rod (5) penetrates the through holes (52) and is in sliding connection with the through holes (52), the telescopic rod (22) extends into the through holes (52) and is hinged with the connecting rod (5), two first sliding grooves (53) are symmetrically provided in the two sides of the piston rod of the injector (1) close to the through holes (52), the connecting rod (5) penetrates the first sliding grooves (53) and extends into the guide hole (2) and is in perpendicular fixed connection with the first arc-shaped clamping plate (6), the end of the connecting rod away from the first arc-shaped clamping plate (6) extends out of the through holes (52) and is fixedly connected with an annular limiting plate (54).

6. The improved rapid deep vein puncture cannula kit according to claim 1, wherein The guide hole (2) is embedded with a rubber ring (61) on the side of the piston of the injector (1) away from the first arc-shaped clamping plate (6), the rubber ring (61) is coaxial with the guide hole (2) and is fixedly connected with the inner wall of the guide hole (2).

7. The improved rapid deep vein puncture cannula kit according to claim 1, wherein The side of the piston handle of the injector (1) away from the connecting rod (5) is symmetrically provided with two second arc-shaped clamping plates (71), two connecting rods (72) are respectively symmetrically provided between the second arc-shaped clamping plates (71) and the piston handle of the injector (1), one end of the connecting rod (72) is hinged with the outer side of the second arc-shaped clamping plate (71), the other end of the connecting rod (72) is in sliding connection with the piston handle of the injector (1), a through slot (73) is provided on the connecting rod (72) along the length direction of the connecting rod (72), a guide rod (74) penetrates the through slot (73) and is in sliding connection with the through slot (73), one end of the guide rod (74) is in perpendicular fixed connection with the piston handle of the injector (1), the other end of the guide rod (74) is fixedly provided with a clamping block (75), the guide rod (74) is sleeved with a second spring (76) between the connecting rod (72) and the piston handle of the injector (1).

8. The improved rapid deep vein puncture cannula kit according to claim 7, wherein The outer side of the piston handle of the injector (1) is symmetrically provided with two T-shaped sliding grooves (81), a second sliding block (82) is respectively embedded in the T-shaped sliding grooves (81) and is in sliding connection with the T-shaped sliding grooves (81), one end of the connecting rod (72) away from the second arc-shaped clamping plate (71) is hinged with the second sliding block (82).

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