Pre-filled syringe for port sealing pipe

Abstract

The utility model discloses a pre-filled syringe for sealing an infusion port tube, which can directly perform tube sealing operation after tube washing through an integrated injection structure, avoids many problems of syringe switching, avoids reverse flow of tube washing liquid or tube sealing liquid in the process, and can assist medical staff in automatically realizing a pulse type injection technique. According to the technical scheme, the catheter flushing device is characterized by comprising a pipe flushing cavity, a pipe sealing cavity and a butt joint opening, the pipe flushing cavity and the pipe sealing cavity are arranged side by side, scale marks are arranged on the outer wall of the pipe flushing cavity and the outer wall of the pipe sealing cavity, the butt joint opening is communicated with the interiors of the pipe flushing cavity and the pipe sealing cavity at the same time and can be connected to the tail end of an existing catheter, and a pipe flushing rod and a first piston are arranged at the pipe flushing cavity; a pipe sealing rod and a second piston are arranged at the position of the pipe sealing cavity, one-way valve structures are arranged between the pipe washing cavity and the butt joint opening, one-way valve structures are arranged between the pipe sealing cavity and the butt joint opening, the device further comprises a limiting piece used for limiting the displacement state of the pipe washing rod, and when the pipe washing rod moves by a specific distance, the limiting piece temporarily limits continuous movement of the pipe washing rod.

Description

Technical Field

[0001] The utility model relates to the medical field, and particularly relates to a prefilled syringe for flushing and sealing an infusion port. Background Technique

[0002] A totally implantable access port (TIAPs) is a completely implantable closed device in the human body, including a catheter part with a tip located in the superior vena cava and an injection port implanted subcutaneously, simply referred to as an infusion port (PORT).

[0003] According to the nursing operation specifications of the infusion port, flushing and sealing the port are required after each use of the infusion port.

[0004] Among them, flushing the tube means using normal saline to flush the infusion catheter and related connection devices, especially after the end of the current drug administration treatment, to ensure that there is no residual drug solution; during the flushing process, a single-packaged needleless syringe device prefilled with 10 ml of normal saline is usually used, and the pulse flushing technique, that is, the injection method of "push-stop-push", is used to flush the drug solution attached to the catheter and the blood vessel wall and remove solid attachments.

[0005] The sealing operation is carried out after flushing the tube. Sealing the tube means injecting the sealing solution into the infusion catheter and the entire set of connection devices to be retained, preventing blood in the blood vessel from flowing back and coagulating to block the catheter, and also effectively preventing external infection sources from entering the human body; generally, heparin saline with a concentration of 100 U / mL is used for positive pressure sealing of the tube, and the pulse injection method is also used. At the same time of injection, the catheter connected to the infusion port externally is clamped. If the end of the catheter is a positive pressure connector, the catheter is withdrawn while injecting during sealing. After the two-step operations of flushing and sealing the tube, the subsequent infusion can be effectively ensured to be unobstructed.

[0006] However, when performing the nursing operations of flushing and sealing the infusion port at present, the following problems exist:

[0007] First, since the flushing syringe and the sealing syringe are relatively independent, there is a controversy over whether it is necessary to disinfect the ports of the catheter and its connection devices between the operations of flushing and sealing the tube; and when changing the syringe midway, the end of the catheter will be exposed, posing a risk of accidental infection of the catheter and the infusion port.

[0008] Second, the operation of switching syringes midway is cumbersome, and the aseptic principle needs to be noted during the switching. Specifically, it is not only necessary to quickly and smoothly pick up and replace the sealing syringe, but also necessary to pay extra attention to disinfecting and sterilizing the connection part. Therefore, medical staff with rich nursing experience are required, and the workload of medical staff is large, and the overall nursing time of the infusion port is long, reducing the work efficiency of medical staff.

[0009] III. Due to the different nursing experiences of different medical staff, in the pulsed flushing technique, the compliance of some personnel with standardized operations is relatively poor compared to senior nursing staff, resulting in the inability of some personnel to effectively implement the injection method of "push-stop-push", thus reducing the actual flushing effect.

[0010] Therefore, a special syringe is needed that can perform infusion port care without switching syringes and is convenient for implementing the pulsed injection method. Summary of the Utility Model

[0011] The purpose of the present utility model is to provide a pre-filled syringe for sealing an infusion port. Through an integrated injection structure, the sealing operation can be directly carried out after flushing the tube, avoiding many problems of switching syringes, and preventing the backflow of the flushing liquid or sealing liquid during the process, and can assist medical staff to automatically implement the pulsed injection method.

[0012] In order to achieve the above purpose, the present utility model adopts the following technical solutions:

[0013] A pre-filled syringe for sealing an infusion port includes a flushing chamber, a sealing chamber and a docking port. The flushing chamber and the sealing chamber are arranged side by side. Scale marks are provided on the outer walls of the flushing chamber and the sealing chamber. The docking port is internally connected to both the flushing chamber and the sealing chamber at the same time, and the docking port can be connected to the connector at the end of the existing catheter. The flushing chamber is pre-filled with a flushing liquid, and a flushing rod and a first piston are provided at the flushing chamber. The sealing chamber is pre-filled with a sealing liquid, and a sealing rod and a second piston are provided at the sealing chamber. One-way valve structures are provided between the flushing chamber and the docking port, and between the sealing chamber and the docking port. It also includes a limiting member for restricting the displacement state of the flushing rod. Each time the flushing rod displaces, the limiting member temporarily restricts the continuous movement of the flushing rod.

[0014] Compared with the prior art, the pre-filled syringe for sealing an infusion port adopting the above technical solutions has the following beneficial effects:

[0015] I. When using the pre-filled syringe for sealing an infusion port of the present utility model, when pushing the flushing rod to drive the first piston for injection, the one-way valve at this place will automatically open for the flushing operation. When releasing the control of the flushing rod and pushing the sealing rod to inject the sealing liquid, the one-way valve at this place will open, and the one-way valve at the flushing chamber will synchronously close, so as to realize the sequential operations of flushing and sealing. Since the docking port is connected to both the flushing chamber and the sealing chamber at the same time, there is no need to switch the corresponding syringe in the middle, which can not only avoid the exposure of the catheter end and the problem of whether disinfection is needed again, but also avoid many technical problems such as the cumbersome operation of switching syringes and accidental infections. While meeting the relevant guidelines, quality evaluation standards and operation procedures for infusion port care, it simplifies the specific operation steps and effectively improves the work efficiency of medical staff.

[0016] Second, when the flushing rod moves, the limiting member can achieve a temporary blocking effect on a specific position. By repeating this process, the displacement operation of "push-stop-push" of the flushing rod can be realized, so as to assist medical staff to automatically perform the pulsatile injection technique, without having to consider the experience and operation compliance of medical staff, and unify the pulsatile operation differences of different medical staff, and finally achieve the purpose of clearing the attachments on the catheter and blood vessels.

[0017] Preferably, the flushing cavity is connected to the docking port through a first guiding tube, and the first guiding tube is inclined between the flushing cavity and the docking port. The sealing cavity is connected to the docking port through a second guiding tube, and the second guiding tube is inclined between the sealing cavity and the docking port. The one-way valve structure is a first flap and a second flap. The first flap is rotatably arranged at the end of the first guiding tube close to the docking port, and the second flap is rotatably arranged at any position within the second guiding tube. Due to the special position of the first flap, when flushing is completed and sealing is carried out, the first flap closes and the second flap opens, and the sealing liquid will directly flow through the docking port into the catheter to conform to the normal sequential operation of flushing and sealing.

[0018] Preferably, both the first flap and the second flap are provided with movable ends, and the movable ends are inclined sheet-like structures. When the flushing liquid flows towards the docking port, the movable end of the first flap is away from the inner wall of the first guiding tube, and the movable end of the second flap fits against the inner wall of the second guiding tube. By utilizing the inclined structure of the movable end and the cooperation of the inclined first guiding tube and the second guiding tube, the first flap and the second flap can only flip open towards the docking port, thereby realizing their one-way valve function.

[0019] Preferably, the limiting member is a plurality of valves provided on the inner wall of the flushing cavity. The valves are rotatably connected to the inner wall of the flushing cavity. The number and positions of the plurality of valves are adapted to the scale markings. The inner wall of the flushing cavity is also provided with grooves for the valves to be embedded. After the valves temporarily block the piston structure, under the continuous push of an external force, the valves will flip into the grooves, that is, the piston structure can continue to displace and inject. And due to the number and special setting positions of the valves, a corresponding resistance can be received every time 1 ml is pushed. By repeating this process, a stable and uniform pulsatile injection effect is achieved, so as to stably and effectively clear the attachments in the catheter and blood vessels.

[0020] Preferably, the limiting member is a plurality of damping sheets provided on the inner wall of the flushing cavity. The plurality of damping sheets are evenly spaced along the length direction of the flushing cavity, and the setting positions of the damping sheets are adapted to the scale markings. The damping sheets are used to effectively decelerate and limit the position movement of the piston structure, and by continuously pushing the piston structure to press the damping sheets, the effect of continuous injection is achieved, thereby also realizing the above-mentioned stable and uniform pulsatile injection function.

[0021] Preferably, a slope is provided on the side of the damping sheet away from the docking port, and inclined portions adapted to the slope are provided on both sides of the first piston. By utilizing the guiding effect of the slope, after the piston structure pauses displacement, continuous displacement can compress the damping sheet, thereby realizing the continuous displacement operation of the piston structure. Through this guiding structure, the overall pulsed injection of the piston structure is smoother, and the intermediate pause and continuous injection actions are smooth and stable, thus facilitating medical staff to control the injection force.

[0022] Preferably, a first holding ring for finger insertion is provided on the outer wall of the flushing cavity, and a second holding ring for finger insertion is provided on the outer wall of the sealing cavity. A card slot is provided on the side of the first holding ring away from the docking port, and an elastic card strip adapted to the card slot is provided at the end of the flushing rod. The first holding ring and the second holding ring facilitate the single-handed flushing and sealing operations of medical staff. While increasing the control of the syringe, it is convenient to free up other hands for other nursing actions, further improving the nursing work efficiency; and by utilizing the telescopic characteristics of elastic materials, the connection between the end of the flushing rod and the flushing cavity is realized, avoiding the problem of accidental displacement of the flushing rod. When combined with the above-mentioned one-way valve, the problem of backflow of flushing fluid or sealing fluid into the flushing cavity can be avoided.

[0023] Preferably, a limiting block extends outward from the side of the second holding ring away from the docking port, and a pushing piece is provided at the end of the sealing rod away from the docking port. When the pushing piece contacts the limiting block, the second piston is located at a position between the 0.5 ml and 1 ml scale marks in the sealing cavity. By utilizing the blocking of the displacement path of the sealing rod by the limiting block, the effective control of the displacement distance of the second piston can be realized, avoiding the problem of unknowingly running out of the sealing fluid accidentally, thus facilitating medical staff to clamp the catheter or perform catheter removal operations in a timely manner.

[0024] Preferably, limiting members are provided in both the flushing cavity and the sealing cavity, and a protective cap is detachably connected to the outside of the docking port. During the sealing process, the above-mentioned pulsed injection operation can be carried out synchronously and automatically. The detachable protective cap can facilitate the sealing and transportation before use, avoiding the external contamination of the flushing fluid and the sealing fluid. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of Embodiment 1 of the pre-filled syringe for sealing an infusion port of the present invention.

[0026] Figure 2 It is a schematic diagram of the one-way valve structure in Embodiment 1.

[0027] Figure 3 It is a schematic cross-sectional structure diagram of the limiting member in Embodiment 1.

[0028] Figure 4 It is a schematic structural diagram of the sealing process in Embodiment 1.

[0029] Figure 5 It is a schematic structural diagram of the limiting member in Embodiment 2.

[0030] Reference numerals: 1, flushing lumen; 10, first guiding tube; 2, sealing lumen; 20, second guiding tube; 3, docking port; 30, protective cap; 4, flushing rod; 40, first piston; 5, sealing rod; 50, second piston; 51, pushing piece; 52, folding ring sleeve; 60, first turning piece; 61, second turning piece; 62, movable end; 70, valve; 71, groove; 72, damping thin sheet; 73, slope; 74, inclined portion; 8, first holding member; 80, card slot; 81, elastic card strip; 9, second holding member; 90, limiting block. Detailed implementation manners

[0031] The following further describes the present utility model with reference to the accompanying drawings.

[0032] Embodiment 1:

[0033] As Figures 1 to 4 shown, the pre-filled syringe for sealing an infusion port includes a flushing lumen 1, a sealing lumen 2, and a docking port 3.

[0034] The flushing lumen 1 and the sealing lumen 2 are arranged side by side. Scale marks are provided on the outer walls of the flushing lumen 1 and the sealing lumen 2. Among them, both the flushing lumen 1 and the sealing lumen 2 have a volume of 10 ml. The flushing lumen 1 is pre-filled with 10 ml of physiological saline flushing liquid, and the sealing lumen 2 is pre-filled with 5 ml of 100 U / ml heparin saline sealing liquid.

[0035] The docking port 3 is internally communicated with both the flushing lumen 1 and the sealing lumen 2 at the same time. The docking port 3 can be connected to the connector at the end of an existing catheter. The connector involved in the usage mode of this embodiment is a positive pressure connector.

[0036] A flushing rod 4 and a first piston 40 are provided at the flushing lumen 1, and a sealing rod 5 and a second piston 50 are provided at the sealing lumen 2. One-way valve structures are provided between the flushing lumen 1 and the docking port 3, and between the sealing lumen 2 and the docking port 3.

[0037] To avoid the direct exhaustion of the sealing liquid and cooperate with the one-way valve structure, in this embodiment, the flushing lumen 1 is connected to the docking port 3 through the first guiding tube 10, and the first guiding tube 10 is inclined between the flushing lumen 1 and the docking port 3. The sealing lumen 2 is connected to the docking port 3 through the second guiding tube 20, and the second guiding tube 20 is inclined between the sealing lumen 2 and the docking port 3.

[0038] The one-way valve structure is a first turning piece 60 and a second turning piece 61. And in this embodiment, to avoid the retention of the flushing liquid during the sealing stage, the first turning piece 60 is rotatably arranged at the end of the first guiding tube 10 close to the docking port 3, and the second turning piece 61 can be rotatably arranged at any position within the second guiding tube 20.

[0039] The structure for the flap to specifically implement the one-way valve function is as follows: both the first flap 60 and the second flap 61 are provided with movable ends 62, and the movable ends 62 are inclined sheet-like structures. When the flushing liquid flows towards the docking port 3, the movable end 62 of the first flap 60 is away from the inner wall of the first guiding tube 10, and the movable end 62 of the second flap 61 is in contact with the inner wall of the second guiding tube 20.

[0040] It also includes a limiting member for restricting the displacement state of the flushing rod 4. When the flushing rod 4 displaces a specific distance, the limiting member temporarily restricts the continuous movement of the flushing rod 4.

[0041] Specifically, the limiting member can be a block structure in the flushing cavity 1 or a sheet-like structure with frictional resistance. In this embodiment, a structure similar to a block is adopted. However, to cooperate and not affect the normal flushing operation of the first piston 40, the limiting member is a plurality of valves 70 provided on the inner wall of the flushing cavity 1. The valves 70 are rotatably connected to the inner wall of the flushing cavity 1. The number and positions of the plurality of valves 70 are adapted to the scale markings, and the inner wall of the flushing cavity 1 is also provided with grooves 71 for the valves 70 to be embedded.

[0042] In addition, for the convenience of medical staff operation and to prevent accidental displacement of the flushing rod 4, a first holding ring for fingers to be inserted is provided on the outer wall of the flushing cavity 1, and a second holding ring for fingers to be inserted is provided on the outer wall of the sealing cavity 2. A card slot 80 is provided on the side of the first holding ring away from the docking port 3, and an elastic card strip 81 made of elastic silica gel or elastic rubber adapted to the card slot 80 is provided at the end of the flushing rod 4.

[0043] To prevent the direct exhaustion of the sealing liquid and to remind medical staff to withdraw the tube or clamp the pipeline in time, a limiting block 90 made of elastic silica gel extends outward from the side of the second holding ring away from the docking port 3. A pushing piece 51 is provided at the end of the sealing rod 5 away from the docking port 3. When the pushing piece 51 contacts the limiting block 90, the second piston 50 is located at a position between the 0.5 ml and 1 ml scale markings in the sealing cavity 2.

[0044] A folding ring sleeve 52 is flexibly connected to the side of the pushing piece 51 facing the limiting block 90. When the sealing rod 5 is pushed towards the limiting block 90, the folding ring sleeve 52 is located between the limiting block 90 and the pushing piece 51, and the folding ring sleeve 52 gradually contracts.

[0045] In addition, for performing pulsed operation during sealing, a limiting member with the above structure is also provided in the sealing cavity 2. In this embodiment, a valve 70 and a groove 71 are provided at each ml scale marking on the inner wall of the flushing cavity 1 and the sealing cavity 2, and a 0.5 ml scale marking is particularly marked on the sealing cavity 2.

[0046] And to meet the requirements of syringe encapsulation or transportation, a protective cap 30 is detachably connected to the outside of the interface 3. In this embodiment, the protective cap 30 is threadedly connected to the outside of the interface 3.

[0047] The following is the usage method of this embodiment:

[0048] First, unscrew the protective cap 30 from the interface 3, and push the flushing rod 4 to drive the displacement of the first piston 40. As Figure 2 shown, the flushing liquid will push the first flap 60 in the first guiding tube 10 to flip, so that the flushing liquid passes through the first guiding tube 10 and the interface 3, and is discharged from the interface 3, realizing the exhaust operation of the syringe.

[0049] Then, operate according to the nursing regulations, connect the existing catheter to the patient's infusion port, and screw the interface 3 onto the positive pressure connector at the end of the existing catheter.

[0050] Insert the finger into the first gripping member 8 on the outer wall of the flushing cavity 1, and start pushing the flushing rod 4 to continuously flush the tube. During the flushing process, every time the piston is pushed 1 ml, the first piston 40 will be appropriately blocked by the valve 70, and the first piston 40 will pause its displacement. Then, the valve 70 will be forced to flip into the groove 71, and the first piston 40 can continue to displace; repeating like this, the pulsed flushing operation of "push-stop-push" in the flushing regulations can be realized.

[0051] After 10 ml of flushing liquid is injected, at this time, the elastic strip 81 at the end of the flushing rod 4 will be stuck into the card slot 80 of the first gripping member 8 to lock the position of the flushing rod 4. Immediately insert the finger into the second gripping member 9 on the outer wall of the sealing cavity 2, and start pushing the sealing rod 5. The sealing liquid will push open the second flap 61 in the second guiding tube 20, and the sealing liquid will gradually enter the catheter and the infusion port. At the same time, the first flap 60 of the first guiding tube 10 is forced to flip back to its original position to realize the sealing of the first guiding tube 10; and during the sealing process, due to the corresponding valve 70 and groove 71 also being provided in the sealing cavity 2, the pulsed sealing operation can be realized.

[0052] During the flushing process, in this embodiment, it is a positive pressure connector. When the second piston 50 moves to the position where the 1 ml scale mark is located, at this time, the folding ring sleeve 52 contacts the limit block 90. As the medical staff continue to push, the folding ring sleeve 52 is gradually contracted by the force, and at the same time, the resistance felt by the medical staff's finger during pushing gradually increases, to remind the medical staff that the tube needs to be withdrawn synchronously when injecting the sealing liquid at this time.

[0053] Embodiment 2:

[0054] As Figure 5 shown, the technical content of this embodiment is basically the same as that of Embodiment 1. The difference technical points between this embodiment and Embodiment 1 are:

[0055] Replace the position-limiting member in Embodiment 1 with a plurality of damping thin sheets 72 made of medical-grade silicone provided on the inner walls of the flushing lumen 1 and the lumen sealing lumen 2. The plurality of damping thin sheets 72 are evenly spaced along the length directions of the flushing lumen 1 and the lumen sealing lumen 2, and the positions where the damping thin sheets 72 are provided are adapted to the scale markings.

[0056] Moreover, to avoid excessive obstruction to the first piston 40 and the second piston 50, a slope 73 is provided on the side of the damping thin sheet 72 away from the docking port 3, and inclined portions 74 adapted to the slope 73 are provided on both sides of the first piston 40 or the second piston 50.

[0057] Compared with Embodiment 1, when performing flushing and lumen sealing operations in this embodiment, the operations for achieving pulsed flushing and pulsed lumen sealing are as follows:

[0058] When the first piston 40 or the second piston 50 is displaced to the position of the damping thin sheet 72, the first piston 40 or the second piston 50 is blocked and temporarily stops displacement; due to the adaptation of the inclined portion 74 of the first piston 40 or the second piston 50 to the slope 73, when the first piston 40 or the second piston 50 continues to be displaced, the side wall of the first piston 40 or the second piston 50 will press the damping thin sheet 72, causing the damping thin sheet 72 to contract under force, and the first piston 40 or the second piston 50 can pass through the damping thin sheet 72 at this position and thus continue to be displaced; repeating this process can achieve pulsed flushing and pulsed lumen sealing operations.

[0059] The above is the preferred embodiment of the present invention. For those of ordinary skill in the art, without departing from the principle of the present invention, several variations and improvements can be made, and these should also be regarded as the protection scope of the present invention.

Claims

1. A prefilled syringe for sealing an infusion port, characterized in that: The invention comprises a flushing cavity (1), a sealing cavity (2) and a docking port (3), wherein the flushing cavity (1) and the sealing cavity (2) are arranged side by side, and the outer walls of the flushing cavity (1) and the sealing cavity (2) are both provided with scale marks, and the docking port (3) is simultaneously connected to the inside of the flushing cavity (1) and the sealing cavity (2), and the docking port (3) can be connected to a joint at the end of an existing catheter, and the flushing cavity (1) is pre-filled with a flushing liquid, and a flushing rod (4) is provided at the flushing cavity (1). ) and a first piston (40), the sealing chamber (2) is pre-filled with a sealing liquid, and a sealing rod (5) and a second piston (50) are provided at the sealing chamber (2), a one-way valve structure is provided between the flushing chamber (1) and the docking port (3), and between the sealing chamber (2) and the docking port (3), and also includes a limiter for limiting the displacement state of the flushing rod (4), and each time the flushing rod (4) is displaced, the limiter temporarily limits the continued movement of the flushing rod (4).

2. The prefilled syringe for sealing the infusion port according to claim 1, characterized in that: The flushing cavity (1) is connected to the docking port (3) via a first guide tube (10), and the first guide tube (10) is obliquely arranged between the flushing cavity (1) and the docking port (3); the sealing cavity (2) is connected to the docking port (3) via a second guide tube (20), and the second guide tube (20) is obliquely arranged between the sealing cavity (2) and the docking port (3); the one-way valve structure comprises a first flap (60) and a second flap (61); the first flap (60) is rotatably arranged at an end of the first guide tube (10) close to the docking port (3), and the second flap (61) is rotatably arranged at any position in the second guide tube (20).

3. The prefilled syringe for sealing the infusion port according to claim 2, characterized in that: The first flap (60) and the second flap (61) are both provided with a movable end (62), and the movable end (62) is an inclined sheet structure. When the flushing liquid flows toward the docking port (3), the movable end (62) of the first flap (60) is away from the inner wall of the first guide tube (10), and the movable end (62) of the second flap (61) is in contact with the inner wall of the second guide tube (20).

4. The prefilled syringe for sealing the infusion port according to claim 1, characterized in that: The limiting member is a plurality of valves (70) arranged on the inner wall of the punching cavity (1); the valves (70) are rotatably connected to the inner wall of the punching cavity (1); the number and position of the plurality of valves (70) are adapted to the scale markings; the inner wall of the punching cavity (1) is also provided with a groove (71) in which the valves (70) can be embedded.

5. The prefilled syringe for sealing the infusion port according to claim 1, characterized in that: The limiting member is a plurality of damping sheets (72) arranged on the inner wall of the punching tube cavity (1); the plurality of damping sheets (72) are evenly spaced and distributed along the length direction of the punching tube cavity (1); and the setting positions of the damping sheets (72) are adapted to the scale marks.

6. The prefilled syringe for sealing the infusion port according to claim 5, characterized in that: A slope (73) is provided on the side of the damping sheet (72) away from the docking port (3), and inclined portions (74) adapted to the slope (73) are provided on both sides of the first piston (40).

7. The prefilled syringe for sealing the infusion port according to claim 1, characterized in that: The outer wall of the flushing cavity (1) is provided with a first gripping ring into which a finger can be inserted, and the outer wall of the sealing cavity (2) is provided with a second gripping ring into which a finger can be inserted, a clamping groove (80) is provided on the side of the first gripping ring away from the docking port (3), and an elastic clamping strip (81) adapted to the clamping groove (80) is provided at the end of the flushing rod (4).

8. The prefilled syringe for sealing the infusion port according to claim 7, characterized in that: The second holding ring extends outwardly on a side away from the docking port (3) to form a limit block (90), and the end of the tube sealing rod (5) away from the docking port (3) is provided with a push piece (51), and when the push piece (51) contacts the limit block (90), the second piston (50) is located at a position corresponding to a scale mark between 0.5ml and 1ml in the tube sealing cavity (2).

9. The prefilled syringe for sealing an infusion port according to any one of claims 1 to 8, characterized in that: The flushing cavity (1) and the sealing cavity (2) are both provided with limiting components, and a protective cap (30) is detachably connected to the outside of the docking port (3).

Images