High-pressure-resistant double-cavity type central venous catheter sealing synchronizer

Abstract

The utility model relates to the technical field of medical instruments, in particular to a high-pressure-resistant double-cavity type central venous catheter sealing synchronizer which comprises a fixing seat, a screw rod, a nut, a connecting portion and a hand wheel, the fixing seat is used for fixing two injectors, the axial directions of the two injectors are parallel, the screw rod is connected to the fixing seat in a rotating mode, and the nut is connected to the connecting portion. The axial direction of the screw rod is parallel to the axis of the injector, the nut is in threaded connection with the screw rod, one end of the piston rod is fixedly connected with the nut through the connecting part, the hand wheel is connected with the other end of the screw rod, and the hand wheel drives the bolt to rotate so as to drive the nut to move up and down, so that the nut drives the piston rods of the two injectors to move up and down in the needle tubes. Compared with the prior art, synchronous tube sealing operation is easy, the structure is simple, synchronous movement of an injector piston is guaranteed, tube sealing liquid is kept uniform, and synchronous injection is finished.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a high-pressure resistant double-lumen central venous catheter sealing synchronizer. Background Art

[0002] Peripherally inserted central catheters (PICCs) are often used in patients who need medium- to long-term intravenous infusions. Both chambers of the high-pressure double-lumen PICC can reach an infusion rate of 5 ml / s and can withstand a pressure of 300 PSi, avoiding the incompatibility of two drugs when infused at the same time and reducing the pain of additional indwelling needle puncture during enhanced CT injection during the interval of chemotherapy. The purpose of sealing the tube is to create positive pressure in the catheter to prevent blood backflow, avoid blood reflux when the needle is pulled out, and prevent blood coagulation. The high-pressure resistant double-lumen PICC is an open-ended catheter. The existing technology uses a one-handed double-lumen sealing technique to seal the two lumens at the same time. It is necessary to hold two syringes for sealing in one hand, slowly push the tubes horizontally, reserve 1-2 ml of sealing liquid, and then close the catheter clamp. This method is difficult to perform the sealing operation, and cannot ensure the synchronous movement of the pistons in the two syringes and the uniform injection of the sealing liquid, let alone the simultaneous injection. Therefore, there is an urgent need for a high-pressure resistant double-lumen central venous catheter sealing synchronizer to solve the problems of synchronous movement of the pistons in the two syringes, uniform injection of the sealing liquid, and simultaneous injection. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a high-pressure resistant double-chamber central venous catheter sealing synchronizer to solve the problems of synchronous movement of pistons in two syringes, uniform injection of sealing liquid and simultaneous injection completion.

[0004] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows: 1. A high-pressure resistant double-chamber central venous catheter sealing synchronizer, including a syringe, the syringe including a needle tube and a piston rod movably connected to the needle tube, including:

[0005] A fixing seat, which is used to fix two syringes so that the axes of the two syringes are parallel;

[0006] A screw, the screw is rotatably connected to a fixed seat, and the axial direction of the screw is parallel to the axis of the syringe;

[0007] A nut, the nut being threadably connected to the screw;

[0008] A connecting portion, one end of the piston rod is fixedly connected to the nut through the connecting portion;

[0009] A hand wheel is connected to the other end of the screw rod.

[0010] Furthermore, a first bearing sleeve and a second bearing sleeve are provided on the fixing seat, one end of the screw is coaxially rotatably connected to the first bearing sleeve, and the other end of the screw is coaxially rotatably connected to the second bearing sleeve.

[0011] Furthermore, when the piston rod is in the first state, the nut abuts against the first bearing sleeve, and there is a gap between one end of the piston rod and the injection port.

[0012] Further, in the first state, the distance from the nut to the second bearing sleeve along the axial direction of the screw is greater than the axial length of the needle tube.

[0013] Furthermore, the two injectors are symmetrically arranged with respect to the axis of the screw.

[0014] Furthermore, the fixing seat is provided with two positioning holes, the shapes of the positioning holes match the shape of the needle tube, and the positioning holes are symmetrically arranged with the screw rod as the axis.

[0015] The beneficial effects of the utility model are as follows: compared with the prior art, the synchronous tube sealing operation is easy, the structure is simple, the synchronous movement of the syringe piston is ensured, the tube sealing liquid is kept uniform, and the synchronous push injection is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model discloses a high-pressure resistant double-lumen central venous catheter sealing synchronizer.

[0017] Description of labels:

[0018] 1. Fixed seat; 11. First bearing sleeve; 12. Second bearing sleeve; 13. Positioning hole; 2. Screw; 3. Nut; 4. Connecting part; 5. Hand wheel; 6. Syringe; 61. Needle tube; 62. Piston rod. DETAILED DESCRIPTION

[0019] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0020] Please refer to Figure 1 A high-pressure resistant double-chamber central venous catheter sealing synchronizer includes a syringe 6, the syringe 6 includes a needle tube 61 and a piston rod 62 movably connected to the needle tube 61, including:

[0021] A fixing seat 1, the fixing seat 1 is used to fix two syringes 6 so that the axes of the two syringes 6 are parallel;

[0022] The screw 2 is rotatably connected to the fixing seat 1, and the axial direction of the screw 2 is parallel to the axis of the syringe 6;

[0023] Nut 3, nut 3 is threadedly connected with screw rod 2;

[0024] Connecting part 4, one end of the piston rod 62 is fixedly connected to the nut 3 through the connecting part 4;

[0025] A hand wheel 5 is connected to the other end of the screw rod 2.

[0026] In the above embodiment, two syringes 6 are fixed to the fixing seat 1 for positioning, and then the tube sealing liquid is placed in the syringe 6, and the catheter clamp is opened. The hand wheel 5 is rotated clockwise to drive the screw 2 to rotate, and the screw 2 rotates to drive the nut 3 to move downward, and the nut 3 drives the piston rods 62 of the two syringes 6 to move slowly downward synchronously, and the tube sealing liquid is pushed evenly until 1-2 cm of the tube sealing liquid is reserved, that is, the injection is completed at the same time.

[0027] As an optional embodiment, a first bearing sleeve 11 and a second bearing sleeve 12 are provided on the fixed seat 1, one end of the screw rod 2 is coaxially rotatably connected to the first bearing sleeve 11, and the other end of the screw rod 2 is coaxially rotatably connected to the second bearing sleeve 12.

[0028] In the above embodiment, the first bearing sleeve 11 and the second bearing sleeve 12 cooperate with each other so that the screw rod 2 can rotate stably without deviation.

[0029] As an optional implementation, when the piston rod 62 is in the first state, the nut 3 abuts against the first bearing sleeve 11, and there is a gap between one end of the piston rod 62 and the injection port.

[0030] In the above embodiments, the existence of the gap ensures the reservation of the tube sealing liquid, so that when the syringe 6 is pulled out, no bubbles will remain in the catheter.

[0031] As an optional implementation, in the first state, the distance from the nut 3 to the second bearing sleeve 12 along the axial direction of the screw rod 2 is greater than the axial length of the needle tube 61 .

[0032] In the above embodiment, the moving position of the piston rod 62 is limited, which can ensure that the piston rod 62 can move out of the needle tube 61 and inject the tube sealing liquid into the needle tube 61, and also ensure that the piston rod 62 can move to the bottom of the needle tube 61.

[0033] As an optional embodiment, the two injectors 6 are symmetrically arranged with respect to the axis of the screw 2 .

[0034] In the above embodiment, the syringe 6 and the fixing seat 1 can be made closer, and the transmission of the screw rod 2 can be made more stable and labor-saving.

[0035] As an optional implementation, two positioning holes 13 are provided on the fixing seat 1 , the shapes of the positioning holes 13 match the shape of the needle tube 61 , and the positioning holes 13 are symmetrically arranged with respect to the axial direction of the screw rod 2 .

[0036] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A high-pressure resistant double-chamber central venous catheter sealing synchronizer, comprising a syringe, the syringe comprising a needle tube and a piston rod movably connected to the needle tube, characterized in that: include: A fixing seat, which is used to fix two syringes so that the axes of the two syringes are parallel; A screw, the screw is rotatably connected to a fixed seat, and the axial direction of the screw is parallel to the axis of the syringe; A nut, the nut being threadably connected to the screw; A connecting portion, through which one end of the piston rod is fixedly connected to the nut; A hand wheel connected to the other end of the screw; The fixing seat is provided with a first bearing sleeve and a second bearing sleeve, one end of the screw is coaxially rotatably connected to the first bearing sleeve, and the other end of the screw is coaxially rotatably connected to the second bearing sleeve; When the piston rod is in the first state, the nut abuts against the first bearing sleeve, and there is a gap between one end of the piston rod and the injection port.

2. The high-pressure resistant double-lumen central venous catheter sealing synchronizer according to claim 1, characterized in that: In the first state, the distance from the nut to the second bearing sleeve along the axial direction of the screw is greater than the axial length of the needle tube.

3. The high-pressure resistant double-lumen central venous catheter sealing synchronizer according to claim 1, characterized in that: The two injectors are symmetrically arranged with respect to the axis of the screw.

4. The high-pressure resistant double-lumen central venous catheter sealing synchronizer according to claim 1, characterized in that: The fixing seat is provided with two positioning holes, the shapes of which match the shape of the needle tube, and the positioning holes are symmetrically arranged with the screw rod as the axis.

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