Blood return prevention infusion apparatus structure

Abstract

The utility model discloses a blood return prevention infusion apparatus structure which comprises an infusion tube, one end of the infusion tube is fixedly connected with a connector, the end, away from the infusion tube, of the connector is in interference connection with a connecting tube, one end of the connecting tube is fixedly connected with an installation head, and the end, away from the connecting tube, of the installation head is fixedly connected with a first needle tube. One side of the first needle tube is fixedly connected with a lantern ring in a sleeving mode, one side of the lantern ring is fixedly connected with the end of one side of a short bandage, the other side of the short bandage is fixedly connected with a clamping and fixing assembly, and the other side of the lantern ring is fixedly connected with the end of one side of a long bandage; the end, away from the mounting head, of the first needle tube is fixedly connected with a first threaded connector, the first threaded connector is connected with one end of a blood return preventing assembly through a threaded structure, the other end of the blood return preventing assembly is connected with a second threaded connector through a threaded structure, and one end of the second threaded connector is fixedly connected with one end of a second needle tube. The other end of the second needle tube is fixedly connected with a needle seat which is fixedly connected with a needle.

Description

Technical Field

[0001] The utility model relates to the technical field of infusion sets, in particular to an anti-blood-backflow infusion set structure. Background Art

[0002] An infusion set is a common medical consumable. After being sterilized, a channel is established between the vein and the medicine solution. It is used for intravenous infusion. Under the action of atmospheric pressure, the liquid in the bottle flows into the drip bucket along the thinner infusion hose. When the water column pressure in the drip bucket is greater than the venous pressure, the liquid in the bottle flows into the vein along the hose.

[0003] However, during the infusion process or when the liquid medicine is infused or stopped automatically, when the hydraulic pressure is less than the venous pressure, if the flow rate regulator is not closed in time or the needle is not pulled out, the patient's venous blood will flow back into the infusion hose, and blood return will occur. Once blood return occurs, it will frighten the patient at the least, causing the patient's worry and anxiety, and at the worst, it will cause the blood flowing back into the infusion device to coagulate into blocks. If the blood clot enters the human body, blood clots may block blood vessels, and even serious medical accidents may occur, endangering human health. For this, a Chinese patent with publication number CN214181332U discloses an anti-blood return infusion device, including a fixed tube, the inner surface of the fixed tube is fixedly connected to a fixed rod, the interior of the fixed rod is slidably connected to a movable rod, one end of the movable rod is fixedly connected to a clamping plate, the surface of the clamping plate is fixedly connected to a liquid sensing sensor, the two ends of the inner surface of the fixed tube are fixedly connected to a fixed plate and a micro motor, and the surface of the fixed plate is provided with an arc groove.

[0004] Although the infusion device achieves the purpose of preventing blood backflow, it is powered by a micro motor, the device is relatively complex, and requires electrical energy. When there is a lack of power during use, the micro motor will not work, and the anti-blood backflow function will be lost. For this reason, we propose an anti-blood backflow infusion device structure to solve the above problem. Utility Model Content

[0005] The utility model aims to provide an anti-blood-backflow infusion device structure to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-blood backflow infusion device structure, comprising an infusion tube, one end of the infusion tube is fixedly connected to a connector, the connector is interference-connected to a connecting tube at one end away from the infusion tube, one end of the connecting tube is fixedly connected to a mounting head, the mounting head is fixedly connected to a needle tube at one end away from the connecting tube, one side of the needle tube is fixedly connected to a sleeve ring, one side of the ring is fixedly connected to one end of a short strap, the other side of the short strap is fixedly connected to a clamping assembly, and the other side of the ring is fixedly connected to one end of a long strap;

[0007] The end of the needle tube one away from the mounting head is fixedly connected to the threaded joint one, the threaded joint one is connected to one end of the anti-blood backflow component through a threaded structure, the other end of the anti-blood backflow component is connected to the threaded joint two through a threaded structure, one end of the threaded joint two is fixedly connected to one end of the needle tube two, the other end of the needle tube two is fixedly connected to the needle seat, and the needle seat is fixedly connected to the needle.

[0008] Preferably, an adhesive plate is bonded to one side of the short strap and the long strap close to the ring, and the adhesive plates are arranged on the same side.

[0009] Preferably, a plurality of slots are provided in the middle of a side of the long strap away from the ring, and the slots are provided on an end surface away from the adhesive plate.

[0010] Preferably, the fixing assembly includes a fixing seat, a knob, a movable strip, and a clamping strip. The fixing seat is fixedly connected to a short strap, the middle part of the fixing seat is sleeved with a knob through a threaded structure, one end of the knob is rotatably connected to one end face of the movable strip, the movable strip is slidably arranged in the fixing seat, the other end face of the movable strip is fixedly connected to the clamping strip, and the clamping strip is clamped in cooperation with the clamping slot.

[0011] Preferably, the anti-backflow component includes a flow tube, a liquid stop ball, a baffle, a threaded connection tube 1, and a threaded connection tube 2. One end of the flow tube is fixedly connected to the threaded connection tube 2, and the threaded connection tube 2 is threadedly matched with a threaded joint 1. The other end of the flow tube is fixedly connected to the threaded connection tube 1, and the threaded connection tube 1 is threadedly matched with the threaded joint 2. A liquid stop ball is movably provided in the flow tube, and a baffle is fixedly connected to one side of the flow tube, and a plurality of through holes are opened on the baffle.

[0012] Preferably, one side of the flow tube is a conical tube structure, and the other side is a tube-shaped structure, and the two are integrally formed.

[0013] Compared with the prior art, the beneficial effects of the utility model are: the anti-blood backflow component can prevent blood backflow when the hydraulic pressure is less than the venous pressure, and at the same time, it can stop the blood from flowing back without external power, and the anti-blood backflow effect is stable; through the setting of the strap, it is convenient to fix the needle tube, prevent the needle tube from shifting during the infusion process, and avoid the needle from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a structural schematic diagram of another viewing angle of the utility model;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the anti-blood backflow component of the utility model.

[0017] In the figure: infusion tube 1, connector 2, connecting tube 3, mounting head 4, needle tube 1 5, collar 6, short strap 7, fixing component 8, fixing seat 81, knob 82, movable bar 83, fixing bar 84, long strap 9, slot 91, threaded joint 10, anti-blood backflow component 11, flow tube 111, liquid stop ball 112, baffle 113, threaded connecting tube 1 114, threaded connecting tube 2 115, threaded joint 2 12, needle tube 2 13, needle seat 14, needle 15, adhesive plate 16. DETAILED DESCRIPTION

[0018] 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.

[0019] Example 1

[0020] Reference Figure 1 , 2 , which is the first embodiment of the utility model, and provides an anti-blood backflow infusion device structure, including an infusion tube 1, one end of the infusion tube 1 is fixedly connected to a connector 2, the end of the connector 2 away from the infusion tube 1 is interference connected to a connecting tube 3, one end of the connecting tube 3 is fixedly connected to a mounting head 4, the end of the mounting head 4 away from the connecting tube 3 is fixedly connected to a needle tube 5, one side of the needle tube 5 is fixedly connected to a sleeve ring 6, one side of the sleeve ring 6 is fixedly connected to one end of a short strap 7, the other side of the short strap 7 is fixedly connected to a clamping assembly 8, and the other side of the sleeve ring 6 is fixedly connected to one end of a long strap 9;

[0021] One end of the needle tube 5 away from the mounting head 4 is fixedly connected to a threaded connector 10, the threaded connector 10 is connected to one end of an anti-blood-backflow component 11 through a threaded structure, the other end of the anti-blood-backflow component 11 is connected to a threaded connector 2 12 through a threaded structure, one end of the threaded connector 2 12 is fixedly connected to one end of a needle tube 2 13, the other end of the needle tube 2 13 is fixedly connected to a needle seat 14, and the needle seat 14 is fixedly connected to a needle 15.

[0022] When used for infusion, the needle 15 is inserted into the vein and bonded to the patient's arm or clothes at the arm position through the adhesive on the surface of the adhesive plate 16 to limit and fix the needle tube 5. Then the long strap 9 is wrapped around the outside of the arm, and the end of the long strap 9 passes through the clamping component 8. The long strap 9 cooperates with the short strap 7 to form a ring structure and is tied to the outside of the arm. Then the position of the long strap 9 is fixed by the clamping component 8 to further ensure the stability of the needle tube 5. When the hydraulic pressure is less than the venous pressure, the blood enters the anti-blood backflow component 11, and the anti-blood backflow component 11 closes the infusion passage, thereby preventing the flow of blood.

[0023] Example 2

[0024] Reference Figure 1-3 , which is the second embodiment of the utility model, and this embodiment is based on the previous embodiment. Specifically, the short strap 7 and the long strap 9 are bonded with an adhesive plate 16 on one side close to the ring 6, and the adhesive plate 16 is set on the same side. The adhesive plate 16 is a double-sided adhesive, and the short strap 7 and the long strap 9 are fixed in position by bonding. The short strap 7 and the long strap 9 are made of plastic and have strong deformation ability.

[0025] Furthermore, a plurality of slots 91 are provided in the middle of one side of the long strap 9 away from the collar 6 , and the slots 91 are provided on an end surface away from the adhesive plate 16 .

[0026] Furthermore, the clamping assembly 8 includes a clamping seat 81, a knob 82, a movable bar 83, and a clamping bar 84. The clamping seat 81 is fixedly connected to the short strap 7. The middle part of the clamping seat 81 is sleeved with the knob 82 through a threaded structure. One end of the knob 82 is rotatably connected to one end face of the movable bar 83. The movable bar 83 is slidably arranged in the clamping seat 81. The other end face of the movable bar 83 is fixedly connected to the clamping bar 84. The clamping bar 84 is clamped and matched with the clamping slot 91. The clamping seat 81 is a U-shaped structure.

[0027] The long strap 9 is wrapped around the outside of the arm, and the end of the long strap 9 passes through the fixing seat 81 of the fixing assembly 8. The long strap 9 cooperates with the short strap 7 to form a ring structure and is tied outside the arm. Then the knob 82 is rotated to drive the movable bar 83 to move, and the movable bar 83 drives the fixed fixing bar 84 to be inserted into the fixing slot 91, thereby fixing the position of the long strap 9 and further ensuring the stability of the needle tube 5.

[0028] Specifically, the anti-backflow component 11 includes a flow tube 111, a liquid-stopping ball 112, a baffle 113, a threaded connection tube 114, and a threaded connection tube 2 115. One end of the flow tube 111 is fixedly connected to the threaded connection tube 2 115, and the threaded connection tube 2 115 is threadedly matched with the threaded joint 10. The other end of the flow tube 111 is fixedly connected to the threaded connection tube 114, and the threaded connection tube 114 is threadedly matched with the threaded joint 2 12. The liquid-stopping ball 112 is movably provided in the flow tube 111, and a baffle 113 is fixedly connected to one side of the flow tube 111, and a plurality of through holes are opened on the baffle 113.

[0029] Furthermore, one side of the flow tube 111 is a conical tube structure, and the other side is a cylindrical structure, and the two are integrally formed.

[0030] When the hydraulic pressure is lower than the venous pressure, blood enters the flow tube 111 of the anti-blood backflow component 11, and the blood pushes the liquid-stopping ball 112 to move toward the conical tube structure of the flow tube 111. After the liquid-stopping ball 112 hits the inner wall of the conical tube structure of the flow tube 111, the passage of the conical tube structure of the flow tube 111 is closed, thereby preventing the flow of blood.

[0031] Example 3

[0032] Reference Figure 1-3 , which is the third embodiment of the utility model. This embodiment is based on the above two embodiments. When the infusion is used, the needle 15 is inserted into the vein and is bonded to the patient's arm or the clothes at the arm position through the adhesive on the surface of the adhesive plate 16. The needle tube 5 is limited and fixed, and then the long strap 9 is wrapped around the outside of the arm. The end of the long strap 9 passes through the clamping seat 81 of the clamping assembly 8. The long strap 9 cooperates with the short strap 7 to form a ring structure and is tied outside the arm. Then the knob 82 is rotated to drive the movable bar 83 to move, and the movable bar 8 3 drives the fixed clamping strip 84 to be clamped into the clamping groove 91, thereby fixing the position of the long binding belt 9, further ensuring the stability of the needle tube 5. When the hydraulic pressure is less than the venous pressure, blood enters the flow tube 111 of the anti-blood backflow component 11, and the blood pushes the liquid-stopping ball 112 to move toward the conical tube structure of the flow tube 111. After the liquid-stopping ball 112 hits the inner wall of the conical tube structure of the flow tube 111, the passage of the conical tube structure of the flow tube 111 is closed, thereby preventing the flow of blood.

[0033] Although 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. An anti-blood-backflow infusion device structure, comprising an infusion tube (1), characterized in that: One end of the infusion tube (1) is fixedly connected to the connector (2), the end of the connector (2) away from the infusion tube (1) is interference-connected to the connecting tube (3), one end of the connecting tube (3) is fixedly connected to the mounting head (4), the end of the mounting head (4) away from the connecting tube (3) is fixedly connected to a needle tube (5), one side of the needle tube (5) is fixedly connected to a sleeve ring (6), one side of the ring (6) is fixedly connected to one end of a short strap (7), the other side of the short strap (7) is fixedly connected to a clamping assembly (8), and the other side of the ring (6) is fixedly connected to one end of a long strap (9); One end of the needle tube 1 (5) away from the mounting head (4) is fixedly connected to a threaded connector 1 (10); the threaded connector 1 (10) is connected to one end of an anti-blood-return component (11) via a threaded structure; the other end of the anti-blood-return component (11) is connected to a threaded connector 2 (12) via a threaded structure; one end of the threaded connector 2 (12) is fixedly connected to one end of a needle tube 2 (13); the other end of the needle tube 2 (13) is fixedly connected to a needle seat (14); and the needle seat (14) is fixedly connected to a needle (15); The anti-blood-back component (11) comprises a flow tube (111), a liquid-stopping ball (112), a baffle (113), a threaded connection tube 1 (114), and a threaded connection tube 2 (115); one end of the flow tube (111) is fixedly connected to the threaded connection tube 2 (115); the threaded connection tube 2 (115) is threadedly matched with the threaded joint 1 (10); the other end of the flow tube (111) is fixedly connected to the threaded connection tube 1 (114); the threaded connection tube 1 (114) is threadedly matched with the threaded joint 2 (12); a liquid-stopping ball (112) is movably provided in the flow tube (111); a baffle (113) is fixedly connected to one side of the flow tube (111); and a plurality of through holes are formed on the baffle (113).

2. The anti-blood-backflow infusion device structure according to claim 1, characterized in that: An adhesive plate (16) is bonded to one side of the short binding strap (7) and the long binding strap (9) close to the ring (6), and the adhesive plate (16) is arranged on the same side.

3. The anti-blood-backflow infusion device structure according to claim 2, characterized in that: A plurality of slots (91) are provided in the middle of a side of the long binding strap (9) away from the collar (6), and the slots (91) are provided on an end surface away from the adhesive plate (16).

4. The anti-blood-backflow infusion device structure according to claim 3, characterized in that: The clamping assembly (8) comprises a clamping seat (81), a knob (82), a movable bar (83), and a clamping bar (84); the clamping seat (81) is fixedly connected to the short strap (7); the middle portion of the clamping seat (81) is sleeved with the knob (82) via a threaded structure; one end of the knob (82) is rotatably connected to one end face of the movable bar (83); the movable bar (83) is slidably arranged in the clamping seat (81); the other end face of the movable bar (83) is fixedly connected to the clamping bar (84); and the clamping bar (84) is clamped and matched with the clamping slot (91).

5. The anti-blood-backflow infusion device structure according to claim 1, characterized in that: One side of the flow tube (111) is a conical tube structure, and the other side is a tube-shaped structure, and the two are integrally formed.

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