Positive-pressure water stop clamp

Abstract

The utility model relates to the technical field of medical instruments, in particular to a positive-pressure water stop clamp for an indwelling needle. The infusion tube fixing device comprises an infusion tube mounting part and a press-fit part connected with one end of the infusion tube mounting part, a longitudinal left protruding strip and a longitudinal right protruding strip are sequentially arranged on the inner surface of the infusion tube mounting part in the transverse direction of the infusion tube mounting part, and a protruding extrusion part capable of being matched with the left protruding strip and the right protruding strip at the same time is arranged on the lower portion of the press-fit part. Due to the fact that the pressing area is increased, a part of liquid medicine is pushed into the human body at the moment of clamping, blood backflow is effectively avoided, thrombus and phlebitis caused by hemagglutination are prevented, and the infusion risk of a patient is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a positive pressure water stop clamp. Background Art

[0002] The water stop clamp serves as a safety clip for the indwelling needle and plays an important role in its use. After the infusion is completed, the indwelling needle needs to be cut off by the water stop clamp to prevent negative pressure and blood backflow.

[0003] Currently, the compression points of common waterstop clamps are two curved protrusions on the top and bottom. When the clamp is closed, the infusion tube passes through the adjacent sides of the protrusions and is squeezed. Because there is only one compression point, whether blood backflow occurs depends entirely on the compression effect at this point. If this compression point fails to completely seal the infusion tube, blood backflow can occur. In particular, blood clots can cause thrombosis and phlebitis, resulting in adverse consequences. Summary of the Invention

[0004] The purpose of the utility model is to design a positive pressure water stop clamp with good sealing effect.

[0005] The utility model comprises an infusion tube mounting portion and a pressing portion connected to one end thereof, wherein the inner surface of the infusion tube mounting portion is provided with a left protrusion and a right protrusion which are sequentially arranged longitudinally along the transverse direction thereof, and the lower part of the pressing portion is provided with a protruding extrusion portion which can simultaneously cooperate with the left protrusion and the right protrusion.

[0006] Furthermore, the first surface between the left protrusion and the right protrusion is a part of a cylindrical surface, and the height of the arc of its cross section is less than the radius of the arc; the pressing surface of the pressing part is an arc surface in the same direction as the first surface, and its radius is equal to or greater than the radius of the first surface, and the height of the pressing surface is greater than its radius.

[0007] Furthermore, both sides of the pressing part are connected to the upper part of the pressing part through inclined surfaces, and the pressing part is provided with a circular hole coaxial with the extrusion part.

[0008] Furthermore, the pressing portion includes a cylindrical extrusion portion whose upper plate surface and lower surface are pressing surfaces, and the two sides of the extrusion portion are connected to the upper plate surface through an inclined first side plate and a second side plate, and the first side plate, the second side plate and the middle part of the upper surface of the extrusion portion are connected to the upper plate surface through a longitudinal supporting vertical plate perpendicular to the axis of the extrusion portion.

[0009] Furthermore, the upper surfaces of the left protrusion and the right protrusion are both arc surfaces that smoothly transition to the first surface and the other side surface thereof.

[0010] The design of the present invention has at least two pressing points, which can ensure that at least one point can achieve complete closure of the infusion tube, thereby avoiding the situation of insufficient sealing pressure. Especially in the process of pressing the infusion tube installation part to buckle it with the pressing part, the first surface cooperates with the pressing surface to cut off the infusion tube, and pushes a part of the liquid medicine into the human body at the moment of cutoff. After the infusion tube is completely clamped, a certain pressure is formed, which effectively avoids blood reflux and prevents blood coagulation from causing thrombosis and phlebitis, thereby greatly reducing the patient's infusion risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model in use;

[0013] Figure 3 for Figure 2 Cross-sectional view in the AA direction;

[0014] In the figure, 1. infusion tube mounting part, 2. pressing part, 3. left protrusion, 4. first surface, 5. right protrusion, 6. first strip hole, 7. second strip hole, 8. upper buckle, 9. upper plate surface, 10. extrusion part, 11. pressing surface, 12. anti-slip protrusion, 13. lower buckle, 14. first side panel, 15. second side panel, 16. supporting vertical plate, 17. infusion tube. DETAILED DESCRIPTION

[0015] Unless otherwise specified, this utility model Figure 2 The directions shown are the directions, wherein the left-right direction is the longitudinal direction and the direction perpendicular to the shown cross section is the transverse direction.

[0016] like Figure 1-3 As shown, this embodiment includes an infusion tube mounting portion 1 and a press-fit portion 2 connected to one end thereof. The inner surface of the lower end of the infusion tube mounting portion 1 is provided with a left protrusion 3 and a right protrusion 5 arranged in sequence along the transverse direction. Both protrusions are longitudinally elongated. A first surface 4 between the left and right protrusions 3 and 5 is concave and forms a portion of a cylindrical surface. The height of the arc of the cross section of the first surface 4 is less than the radius of the arc.

[0017] The upper surfaces of the left protrusion 3 and the right protrusion 5 are both arc surfaces that smoothly transition to the first surface and the other side surface thereof, that is, the upper surfaces of the left protrusion 3 and the right protrusion 5 are arc surfaces that smoothly transition to the surfaces on both sides thereof.

[0018] The left and right sides of the infusion tube mounting portion 1 of this embodiment are upwardly curved. The left curved portion is provided with a second strip hole 7, with an upper buckle 8 at its upper end. The right upward curved portion is provided with a first strip hole 6, the upper end of which connects to the press-fit portion 2 of this embodiment. The left end of the press-fit portion 2 is provided with a lower buckle 13 that mates with the upper buckle 8.

[0019] The first strip hole 6 and the second strip hole 7 are used to allow the infusion tube 17 to pass through them when in use, which plays a role in limiting the infusion tube 17, so that the infusion tube 17 is located between the infusion tube mounting part 1 and the pressing part 2, and can improve the elasticity between the two, making it easier to buckle with the pressing part 2.

[0020] The pressing portion 2 of this embodiment includes an upper plate surface 9 and a cylindrical extrusion portion 10 integrally formed therewith, i.e., the extrusion portion 10 is a hollow structure. The two sides of the upper portion of the extrusion portion 10 are connected to the left and right sides of the upper plate surface 9 respectively via an inclined first side plate 14 and a second side plate 15. The first side plate 14, the second side plate 15, and the middle portion of the upper surface of the extrusion portion 10 are connected to the upper plate surface 9 via a transverse support plate 16 perpendicular to the axis of the extrusion portion 10. The structure of the cylindrical extrusion portion 10 and the connection structure between it and the upper plate surface 9 both adopt a lightweight design, which can also reduce the production cost of this embodiment.

[0021] The outer surface of the extrusion portion 10 of this embodiment is parallel to the central axis of the first surface 4, and their radii are the same. The surface located below the first side plate 14 and the second side plate 15 is the pressing surface 11. The height of the pressing surface 11 is greater than the radius of the extrusion portion 10, thereby ensuring that the pressing surface 11 has a pressing point with the left protrusion 3 and the right protrusion 5 respectively in the pressed state. The technical solution of the pressing surface 11 having the same radius as the first surface 4 can also achieve a pressing effect on the first surface 4. The pressing surface 11 cooperates with the first surface 4, thereby squeezing the liquid medicine in the infusion tube 17 at this cooperation point to both sides, and pushing a part of the liquid medicine into the human body. Under the action of the left protrusion 3 and the right protrusion 5, the infusion tube 17 of the indwelling needle is clamped between the pressing surface 11 and the first surface 4, providing a certain pressure to prevent blood from flowing back.

[0022] During actual production, the radius of the extrusion portion 10 may be larger than that of the first surface 4 .

[0023] The upper surface of the upper plate surface 9 of the pressing portion 2 is provided with a group of anti-slip protrusions 12, which are composed of a plurality of semicircular protrusions and play an anti-slip role when buckling.

[0024] When using this embodiment, the infusion tube 17 of the indwelling needle is first passed through the first strip hole 6 and the second strip hole 7 of the infusion tube mounting part 1, so that it passes through the interior of the infusion tube mounting part 1, passes through the left protrusion 3, the right protrusion 5 and the top of the first surface 4; after the infusion is completed, the anti-slip protrusion 12 on the pressing part 2 is pressed, and the upper buckle 8 and the lower buckle 13 are buckled by pressing the infusion tube mounting part 1 and the pressing part 2. At this time, the pressing surface 11 of the pressing part 2 and the first surface 4 between the left protrusion 3 and the right protrusion 5 cooperate with each other to intercept the infusion tube 17, and at the moment of interception, a part of the liquid medicine is pushed into the human body, and after the infusion tube 17 is completely clamped, a certain pressure is formed, which effectively avoids blood reflux, thereby greatly reducing the infusion risk of the patient.

Claims

1. A positive pressure water stop clamp, comprising a liquid infusion tube mounting portion and a pressing portion connected to one end of the liquid infusion tube, characterized in that: The inner surface of the infusion tube installation portion is provided with a left protrusion and a right protrusion arranged longitudinally in sequence along its transverse direction, and the lower part of the pressing portion is provided with a protruding extrusion portion that can simultaneously cooperate with the left protrusion and the right protrusion.

2. The positive pressure water stop clamp according to claim 1, characterized in that: The first surface between the left protrusion and the right protrusion is a part of a cylindrical surface, and the height of the arc of its cross section is less than the radius of the arc; the pressing surface of the pressing part is an arc surface in the same direction as the first surface, and its radius is equal to or greater than the radius of the first surface, and the height of the pressing surface is greater than its radius.

3. The positive pressure water stop clamp according to claim 2, characterized in that: The two sides of the pressing part are connected with the upper part of the pressing part through inclined surfaces, and the pressing part is provided with a circular hole coaxial with the extrusion part.

4. The positive pressure water stop clamp according to claim 3, characterized in that: The pressing portion includes a cylindrical extrusion portion whose upper plate surface and lower surface are pressing surfaces. The two sides of the extrusion portion are connected to the upper plate surface through an inclined first side plate and a second side plate. The first side plate, the second side plate and the middle part of the upper surface of the extrusion portion are connected to the upper plate surface through a horizontal supporting vertical plate perpendicular to the axis of the extrusion portion.

5. The positive pressure water stop clamp according to claim 1, 2, 3 or 4, characterized in that: The upper surfaces of the left protrusion and the right protrusion are both arc surfaces that smoothly transition to the first surface and the other side surface thereof.

Images