Blood return prevention device for venous indwelling needle

Abstract

The utility model provides a blood return prevention device for a venous indwelling needle, and relates to the field of medical equipment. The blood return prevention device for the venous indwelling needle comprises a wrist strap, a support is fixed to the wrist strap, protection plates are arranged on the front side and the rear side of the wrist strap, a cavity is hinged to the support, the upper end of the cavity is open, two arc-shaped grooves communicated with the interior of the cavity are formed in the bottom face of the cavity, a branch pipe is fixed to the bottom end of the interior of the cavity, and a conical plug elastically slides on the branch pipe. A sealing plate elastically slides at the bottom of the branch pipe, the sealing plate is located outside the cavity, the conical plug makes contact with the top of the cavity and seals the interior of the cavity when not subjected to external force, the sealing plate is attached to the bottom of the cavity and seals the arc-shaped groove, an inner threaded pipe concentric with the cavity is fixed to the top of the cavity, and an outer threaded pipe is arranged above the cavity. According to the blood return prevention device for the venous indwelling needle, the cavity, the tip cone, the wrist strap and the conical plug are arranged, the whole cavity can be folded into a protection plate of the wrist strap, safety and convenience are achieved, and normal life is not affected.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a device for preventing blood return of a venous indwelling needle. Background Art

[0002] The medical level of today's society is getting higher and higher. When doctors treat patients, they often need to perform repeated intravenous injections. In order to relieve the patient's pain, intravenous catheters are needed. The application of intravenous catheters is a better method of clinical infusion. On the one hand, it can relieve the pain of repeated scalp punctures in infants and young children and can be suitable for adults with long-term infusions. On the other hand, it also reduces the workload of clinical nurses. Preventing blood return is a very important part of the installation of intravenous catheters.

[0003] Application No. 202210329902.4 discloses an anti-blood backflow device for intravenous catheters for pediatric care, which closes the infusion pipeline by squeezing the airbag and quickly deflating it. However, the catheter needs to follow the patient and cannot delay the patient's normal life when not receiving infusion. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a device for preventing blood backflow of a venous indwelling needle, which solves the problems raised in the background technology.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: an anti-blood backflow device for an intravenous indwelling needle, comprising a wristband, a bracket fixed on the wristband, protective plates on the front and back sides of the wristband, a chamber hinged on the bracket, the upper end of the chamber is open, and the bottom surface of the chamber is provided with two arc-shaped grooves connected to the interior thereof, a branch pipe is fixed at the bottom end of the interior of the chamber, a conical plug is elastically slid on the branch pipe, a sealing plate is elastically slid on the bottom of the branch pipe, the sealing plate is outside the chamber, and the conical plug contacts the top of the chamber and seals the interior thereof when not subject to external force, the sealing plate is attached to the bottom of the chamber and seals the arc-shaped groove, an internally threaded tube concentric with the chamber is fixed on the top of the chamber, an externally threaded tube is provided above the chamber, a hollow top cone is fixed at the bottom of the externally threaded tube, and two through grooves connected to the interior thereof are provided at the bottom of the top cone, and when the externally threaded tube is screwed into the interior of the internally threaded tube, the top cone pushes the conical plug downward.

[0008] Preferably, the upper end of the protection plate is a raised structure, the raised structure matches the diameter of the cavity, and an infusion tube rack is fixed to one side of the protection plate.

[0009] Preferably, a sliding pin is fixed to the bottom of the conical plug, the bottom of the sliding pin is fixed to the sealing plate, and a spring is installed between the conical plug and the branch pipe.

[0010] Preferably, the interior of the upper end of the chamber is an arc-shaped structure, and the middle of the chamber is a protruding annular structure.

[0011] Preferably, the upper end side surface of the conical plug is a sloped structure, and the sloped structure cooperates with the arc structure of the chamber.

[0012] Preferably, the externally threaded tube cooperates with the internally threaded tube, and an infusion tube connecting sleeve is installed on the upper end of the externally threaded tube.

[0013] (III) Beneficial effects

[0014] The utility model provides a device for preventing blood backflow of a venous indwelling needle. It has the following beneficial effects:

[0015] 1. The device for preventing blood backflow of intravenous indwelling needle is provided with a chamber, a top cone, a wristband and a conical plug. During infusion, the external threaded tube connected to the infusion tube is screwed into the internal threaded tube. At this time, the medicine liquid can enter the chamber through the top cone, and then enter the indwelling needle from the arc groove at the bottom of the chamber. When the infusion is cancelled, it is only necessary to unscrew the external threaded tube from the internal threaded tube. At this time, under the action of the spring, the arc groove and the upper end of the chamber are sealed, the medicine liquid inside can prevent blood backflow, and the entire chamber can also be folded into the protective plate of the wristband, which is very safe and convenient and does not affect normal life.

[0016] 2. The intravenous indwelling needle anti-blood backflow device is provided with a protective plate, which can hide the chamber, and the infusion tube holder can fix the infusion tube of the indwelling needle, so the whole hand is always in a safe state and the indwelling needle will not be knocked off by external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a partial structural sectional view of the utility model;

[0019] Figure 3 This is a structural breakdown diagram of the utility model;

[0020] Figure 4 This is another perspective of the split diagram of the utility model.

[0021] Among them, 1. wrist strap; 2. bracket; 3. protection plate; 4. chamber; 5. arc groove; 6. branch pipe; 7. conical plug; 8. sealing plate; 9. internal threaded pipe; 10. external threaded pipe; 11. top cone; 12. through groove; 13. infusion tube rack; 14. spring; 15. infusion tube connecting sleeve. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The present invention provides a device for preventing blood backflow from a venous indwelling needle:

[0024] like Figure 1-Figure 4 As shown, it includes a wristband 1, which can be made of an elastic woven cloth belt, which is not only comfortable but also can avoid compressing blood vessels. A bracket 2 is fixed on the wristband 1, and a protective plate 3 is provided on the front and back sides of the wristband 1. An infusion tube holder 13 is fixed on one side of the protective plate 3, through which the infusion tube can be passed to play a role of fixing the direction. A chamber 4 is hinged on the bracket 2, and the upper end of the protective plate 3 is a convex structure, which matches the diameter of the cavity. The upper end of the chamber 4 is an arc-shaped structure, and the middle part of the chamber 4 is a protruding annular structure. The upper end of the chamber 4 is open, and the bottom surface of the chamber 4 is provided with two arc-shaped grooves 5 connected with the inside thereof. The bottom of the chamber 4 is used to install the infusion tube of the indwelling needle, and a branch tube 6 is fixed at the bottom end of the chamber 4. A conical plug 7 is elastically slidably provided on the branch tube 6, and a sealing plate 8 is elastically slidably provided on the bottom of the branch tube 6. The conical plug A sliding pin is fixed at the bottom of 7, and the bottom of the sliding pin is fixed to the sealing plate 8. A spring 14 is installed between the conical plug 7 and the branch pipe 6. The sealing plate 8 is outside the chamber 4. When the conical plug 7 is not subjected to external force, it contacts the top of the chamber 4 and seals its interior. The upper end side of the conical plug 7 is a slope structure, and the slope structure cooperates with the arc structure of the chamber 4. The sealing plate 8 fits with the bottom of the chamber 4 and seals the arc groove 5. An internal threaded tube 9 concentric with the chamber 4 is fixed on the top of the chamber 4. An external threaded tube 10 is provided above the chamber 4. A hollow top cone 11 is fixed at the bottom of the external threaded tube 10. Two through grooves 12 connected with the interior are provided at the bottom of the top cone 11. When the external threaded tube 10 is screwed into the interior of the internal threaded tube 9, the top cone 11 pushes the conical plug 7 downward, and the external threaded tube 10 cooperates with the internal threaded tube 9. An infusion tube connecting sleeve 15 is installed on the upper end of the external threaded tube 10.

[0025] When in use, during infusion, the external threaded tube 10 connected to the infusion tube is screwed into the internal threaded tube 9. At this time, the medicine can enter the chamber 4 through the top cone 11, and then enter the indwelling needle from the arc groove 5 at the bottom of the chamber 4. When the infusion is cancelled, it is only necessary to unscrew the external threaded tube 10 from the internal threaded tube 9. At this time, under the action of the spring 14, the arc groove 5 and the upper end of the chamber 4 are sealed, and the medicine inside can prevent blood from flowing back. Moreover, the entire chamber 4 can also be folded into the protective plate 3 of the wristband 1. The entire hand is always in a safe state and the indwelling needle will not be knocked off by external force.

[0026] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preventing blood backflow from a venous indwelling needle, comprising a wristband (1), characterized in that: The wristband (1) is fixed with a bracket (2), and protective plates (3) are provided on the front and rear sides of the wristband (1). A chamber (4) is hingedly connected to the bracket (2), and the upper end of the chamber (4) is open. The bottom surface of the chamber (4) is provided with two arc grooves (5) communicating with the inside thereof. An infusion tube is installed at the bottom of the chamber (4), and a branch pipe (6) is fixed at the bottom end of the chamber (4). A conical plug (7) is elastically slidably provided on the branch pipe (6), and a sealing plate (8) is elastically slidably provided at the bottom of the branch pipe (6). The sealing plate (8) is located outside the chamber (4), and the conical plug (7) is fixed at the bottom end of the chamber (4). 7) contacts with the top of the chamber (4) and seals the interior thereof when not subjected to external force, the sealing plate (8) is attached to the bottom of the chamber (4) and seals the arc groove (5), an internally threaded tube (9) concentric with the top of the chamber (4) is fixed, an externally threaded tube (10) is arranged above the chamber (4), a hollow top cone (11) is fixed at the bottom of the externally threaded tube (10), two through grooves (12) communicating with the interior thereof are arranged at the bottom of the top cone (11), when the externally threaded tube (10) is screwed into the interior of the internally threaded tube (9), the top cone (11) pushes the conical plug (7) downward.

2. The device for preventing blood backflow of a venous indwelling needle according to claim 1, characterized in that: The upper end of the protection plate (3) is a raised structure, the raised structure matches the diameter of the chamber (4), and a transfusion tube rack (13) is fixed on one side of the protection plate (3).

3. The device for preventing blood backflow of a venous indwelling needle according to claim 2, characterized in that: A sliding pin is fixed at the bottom of the conical plug (7), the bottom of the sliding pin is fixed to the sealing plate (8), and a spring (14) is installed between the conical plug (7) and the branch pipe (6).

4. The device for preventing blood backflow of a venous indwelling needle according to claim 3, characterized in that: The interior of the upper end of the chamber (4) is an arc-shaped structure, and the middle part of the chamber (4) is a protruding annular structure.

5. The device for preventing blood backflow of a venous indwelling needle according to claim 4, characterized in that: The upper end side surface of the conical plug (7) is a sloped structure, and the sloped structure cooperates with the arc-shaped structure of the chamber (4).

6. The device for preventing blood backflow of a venous indwelling needle according to claim 5, characterized in that: The externally threaded tube (10) cooperates with the internally threaded tube (9), and a liquid infusion tube connecting sleeve (15) is installed at the upper end of the externally threaded tube (10).

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