Transfusion protection device

Abstract

The invention discloses an infusion protection device which comprises a dropper, a cutoff protection piece is sleeved with the dropper and comprises an annular base plate, a plurality of movable seams are formed in the surface of the annular base plate at equal intervals, and a plurality of extrusion pieces are formed on the surface of the annular base plate through the movable seams. Arc-shaped pieces are integrally formed at the bottom ends of the multiple extrusion pieces, and transition arc surfaces are arranged at the joints of the arc-shaped pieces and the extrusion pieces. Through the arrangement of the extrusion piece, the movable seam, the arc-shaped piece and the transition arc surface, by means of mutual cooperation of the extrusion piece, the movable seam, the arc-shaped piece and the transition arc surface and the arrangement of the opening posture and the closing posture of the extrusion piece and the movable seam, different infusion processes of liquid medicine can be guaranteed, closing or opening of the arc-shaped piece is naturally controlled, and meanwhile internal and external air pressure of the dropper is balanced; the remaining tail end liquid medicine is not input into the body of the patient, and therefore the bad problems that air enters the dropper, and the puncture point of the patient is subjected to edema, extravasated blood and the like are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of infusion set protection, and more specifically, to an infusion set protection device. Background Art

[0002] An infusion set is a common medical consumable. After aseptic processing, a channel between the vein and the drug solution is established for intravenous infusion. It is generally composed of eight parts connected together, including an intravenous needle or injection needle, a needle cap, an infusion hose, a drug filter, a flow rate regulator, a drip pot, a bottle stopper puncture device, and an air filter. Some infusion sets also have injection parts, drug adding ports, etc. The overall working principle of the infusion set is: 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. In particular, the drip pot structure in the infusion set, also known as the Murphys dropper, is involved. The function of this structure is to display the dripping rate and the first exhaust. In special circumstances, it can also be used to add drugs urgently. The advantages of the Murphys dropper are: convenient and simple, uniform dripping speed, reduced stimulation to blood vessels, prevention of extravasation, and reduced patient fear. During the entire treatment process, air cannot be seen entering the blood vessels, which increases the patient's trust in nursing staff.

[0003] However, there are still some shortcomings in its actual use. For example, when the current drip pot is in use, the amount of medicine is no longer added to the drip pot at the end of the infusion, and the remaining tail medicine will gradually decrease. At this time, if the medical staff fails to pull out the injection needle or turn off the flow regulator in time, air will gradually enter the drip pot and enter the infusion pipeline, thereby causing edema and congestion at the patient's puncture point and other adverse problems. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides an infusion protection device, which can ensure different infusion processes of the medicine solution by setting an extrusion sheet, a movable seam, an arc sheet and a transition arc surface, and utilizing the mutual cooperation of the extrusion sheet and the movable seam and the setting of the opening and closing postures, and naturally control the closing or opening of the arc sheet. The movable seam can be squeezed and sealed by utilizing its own elasticity, and the internal and external air pressures of the dropper can be balanced at the same time, so that the remaining tail end medicine solution is not injected into the patient's body, thereby bringing extra operation time for medical staff to pull out the injection needle, thereby avoiding air from entering the dropper, causing medical safety problems such as edema and congestion at the puncture point of the patient, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an infusion protection device, comprising a dropper, the lower end of the dropper is connected to a liquid outlet pipe, the interior of the dropper is provided with a flow cut-off protection sheet, the flow cut-off protection sheet comprises an annular substrate, a plurality of movable seams are equidistantly provided on the surface of the annular substrate, a plurality of extrusion sheets are formed on the surface of the annular substrate through the plurality of movable seams, the bottom ends of the plurality of extrusion sheets are integrally formed with an arc sheet, a transition arc surface is provided at the connection between the arc sheet and the extrusion sheet, and a concave groove is provided on the inner wall surface of the transition arc surface;

[0006] The movable seam is distributed parallel to the central axis of the annular base plate in the vertical direction, the extruded sheet is in an arc shape as a whole, and a plurality of the extruded sheets together form a funnel-shaped structure with a large head and a small tail, the curvature of the surface shape of the funnel-shaped structure increases from top to bottom, the arc-shaped sheet is in a lotus petal shape as a whole, and a plurality of the arc-shaped sheets together form a spherical cavity, the inner cavity volume of the funnel-shaped structure composed of the plurality of extruded sheets decreases from top to bottom, and reaches a minimum value at the connection with the arc-shaped sheet, the inner cavity volume of the arc-shaped sheet is greater than the minimum value of the inner cavity volume of the funnel-shaped structure, the midline position of the concave part of the transition arc surface points to the inner side of the extruded sheet, and is located obliquely above the connection between the extruded sheet and the arc-shaped sheet, the bottom end of the arc-shaped sheet gradually forms a spike-shaped structure, and the spike-shaped structures of the plurality of arc-shaped sheets together form a cone;

[0007] The movable seam and the extrusion sheet satisfy the following rules:

[0008] When the dropper is in a normal infusion state, the extrusion sheet is affected by the fluid pressure and gradually opens radially through the movable slit;

[0009] When the dropper is in a cut-off state, the extrusion sheet squeezes the movable slit through its own elastic force to form a closed funnel-shaped closed posture.

[0010] In a preferred embodiment, the top end of the dropper is connected to an infusion tube, and the infusion tube and the liquid outlet tube are located on the same central axis.

[0011] In a preferred embodiment, a transition fit is adopted between the peripheral side surface of the annular substrate and the inner wall of the dropper, the annular substrate is annular as a whole, and the annular substrate has a planar structure.

[0012] In a preferred embodiment, the inner wall surface of the concave groove forms two arc tracks, one arc track at the top forms the main spherical cavity structure, and the other arc track cooperates with the spike-like structure at the bottom end of the arc piece to gradually form a conical inner cavity.

[0013] In a preferred embodiment, when the extrusion sheet is in an open position, the spacing of its movable seams increases from top to bottom. When the extrusion sheet is in a closed position, the movable seams as a whole are affected by the elastic force of the extrusion sheet and are in a sealed state everywhere.

[0014] Technical effects and advantages of the present invention:

[0015] The present invention arranges an extrusion sheet, a movable seam, an arc sheet and a transition arc surface, utilizes the mutual cooperation of the extrusion sheet and the opening and closing postures of the extrusion sheet and the movable seam, and ensures that when the medicine liquid is continuously output, the movable seam on the surface of the extrusion sheet is compressed by the fluid and remains open, and the medicine liquid continues to pass smoothly at this time. When the infusion enters the tail end and the medicine liquid no longer enters the interior of the dropper, the extrusion sheet as a whole loses the continuous pressure of the fluid, and thus utilizes its own elasticity to squeeze and close the movable seam, thereby maintaining the overall funnel-shaped structure in a closed state, and at the same time balancing the internal and external air pressures of the dropper, so that the remaining medicine liquid at the tail end is not input into the patient's body, thereby bringing extra operation time for medical staff to pull out the injection needle, and avoiding air from entering the dropper, causing edema and congestion at the puncture point of the patient and other adverse problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of a half-section structure of a dropper of the present invention;

[0018] Figure 3 It is a schematic diagram of the bottom structure of the current cut-off protection plate of the present invention;

[0019] Figure 4 It is a schematic diagram of the overall three-dimensional structure of the current cut-off protection piece of the present invention;

[0020] Figure 5 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0021] Figure 6 It is a schematic diagram of the overall structure of the current cut-off protection sheet of the present invention at multiple angles;

[0022] Figure 7 It is a schematic diagram of the cross-sectional structure of the current cut-off protection piece of the present invention;

[0023] Figure 8 It is a schematic diagram of the structure of a single extruded sheet of the present invention;

[0024] Fig. 9 It is a schematic diagram of the local structure of the tail end of the extruded sheet of the present invention;

[0025] Fig.10 It is a schematic diagram of the structure of the dropper of the present invention in the infusion state and the flow cut-off state;

[0026] Fig.11 It is a schematic diagram of the structure of the current cut-off protection piece of the present invention in an open and closed posture;

[0027] Fig.12 It is a schematic diagram of the three-dimensional structure of a single extruded sheet of the present invention.

[0028] The accompanying drawings are marked as follows: 1. dropper; 2. liquid outlet pipe; 3. flow cut-off protection plate; 4. infusion tube; 31. annular base plate; 32. movable seam; 33. extrusion plate; 34. arc-shaped plate; 35. transition arc surface; 36. concave groove. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] As attached Figure 1 To Attachment Fig.12 The infusion protection device shown in the figure comprises a dropper 1, the lower end of the dropper 1 is connected to a liquid outlet pipe 2, the interior of the dropper 1 is provided with a flow cut-off protection sheet 3, the flow cut-off protection sheet 3 comprises an annular base plate 31, the surface of the annular base plate 31 is provided with a plurality of movable seams 32 at equal intervals, the surface of the annular base plate 31 is provided with a plurality of extrusion sheets 33 through the plurality of movable seams 32, the bottom ends of the plurality of extrusion sheets 33 are integrally formed with an arc sheet 34, the arc sheet 34 is connected to the extrusion sheet 33 A transition arc surface 35 is provided at the joint, and a concave groove 36 is provided on the inner wall surface of the transition arc surface 35. Through the above arrangement, it can be ensured that when the arc-shaped sheet 34 expands outward, it will expand outward with the transition arc surface 35 at the connection between the arc-shaped sheet 34 and the extrusion sheet 33 as the reference point, and its excitation sensitivity is high. At the same time, the pressure will first be concentrated on the arc-shaped sheet 34, and then gradually diffused to the extrusion sheet 33 through the transition arc surface 35. The whole process will not cause a sudden large amount of leakage of the drug solution, which meets the safety standard requirements for infusion;

[0031] The movable seam 32 is distributed parallel to the central axis of the annular base plate 31 in the vertical direction. The extruded sheet 33 is in an arc shape as a whole. A plurality of the extruded sheets 33 together form a funnel-shaped structure with a large head and a small tail. The curvature of the surface shape of the funnel-shaped structure increases from top to bottom. The arc-shaped sheet 34 is in a lotus petal shape as a whole. A plurality of the arc-shaped sheets 34 together form a spherical cavity. The inner cavity volume of the funnel-shaped structure composed of the plurality of extruded sheets 33 decreases from top to bottom and reaches a minimum value at the connection with the arc-shaped sheet 34. The inner cavity volume of the arc-shaped sheet 34 is greater than the minimum value of the inner cavity volume of the funnel-shaped structure. The midline position of the depression of the transition arc surface 35 points to the inner side of the extruded sheet 33 and is located obliquely above the connection between the extruded sheet 33 and the arc-shaped sheet 34. The bottom end of the arc-shaped sheet 34 gradually forms a spike-shaped structure. The spike-like structures together form a cone. Through the above arrangement, the funnel-like structure can ensure that the liquid medicine is concentrated at one point to exert concentrated pressure on the arc-shaped pieces 34 at the tips of the multiple extrusion pieces 33, and at the same time, the pressure is diffused to the extrusion pieces 33. The overall movement process is from small to large, which meets the safety requirements of infusion. At the same time, multiple extrusion pieces 33 are used to form a funnel-like structure with a large head and a small tail. In the initial posture of the funnel-like structure, the elastic force of the extrusion pieces 33 is used to extrude and fit the movable seam 32 to form a sealed space. When the external liquid medicine gradually flows into the dropper 1, and its air pressure is greater than the elastic force of the extrusion piece 33, the movable seam 32 is gradually opened as the extrusion piece 33 moves. The whole structure does not need external manual control. The structure itself can automatically perform air pressure balance protection on the dropper 1 according to the change of the amount of liquid medicine during the infusion process to prevent air from entering, thereby further increasing the safety of its overall structure.

[0032] The movable seam 32 and the extrusion sheet 33 satisfy the following rules:

[0033] When the dropper 1 is in a normal infusion state, the squeezing sheet 33 is affected by the fluid pressure and gradually opens radially through the movable slit 32. When the dropper 1 is in a cut-off state, the squeezing sheet 33 squeezes the movable slit 32 through its own elastic force to form a closed funnel-shaped closed state. The different posture settings of the squeezing sheet 33 can ensure that when the pressure difference between the inside and outside of the dropper 1 is inconsistent, the medicine liquid enters the inside of the dropper 1 along the thinner liquid outlet tube 2 under the action of the external atmospheric pressure, and gradually fills the inner cavity of the dropper 1. When the water column pressure inside the dropper 1 is greater than the patient's venous pressure, the liquid in the medicine bottle flows into the vein along the hose to continuously complete the infusion process. When the squeezing sheet 33 blocks the inside of the dropper 1 and balances the pressure difference between the inside and outside, the remaining tail end medicine liquid remains stationary and no longer flows into the patient's vein. At this time, it brings extra operation time for medical staff to pull out the injection needle, avoids outside air from entering the dropper 1, provides timely protection for the cut-off infusion set, and effectively avoids air from entering the inside of the dropper 1 and the infusion tube.

[0034] The top of the dropper 1 is connected to an infusion tube 4, and the infusion tube 4 and the liquid outlet tube 2 are located on the same central axis. The peripheral side surface of the annular base plate 31 and the inner wall of the dropper 1 are transitionally matched. The annular base plate 31 is annular as a whole, and the annular base plate 31 is a planar structure. With the above arrangement, it can be ensured that there is a clear distinction between the annular base plate 31 and the liquid surface of the medicine, and the medicine can be effectively separated into upper and lower halves by the annular base plate 31.

[0035] For details, please refer to the attached manual Figure 7 The inner wall surface of the concave groove 36 forms two arc tracks, one arc track at the top forms the main spherical cavity structure, and the other arc track cooperates with the spike-like structure at the bottom of the arc sheet 34 to gradually form a conical inner cavity.

[0036] The specific implementation method is as follows: by utilizing the two arc-shaped trajectories formed by the inner wall surface of the concave groove 36, the medicine liquid can flow through the funnel-shaped structure from top to bottom, and when it enters the interior of the concave groove 36, the sudden change of its volume from small to large breaks the previous equilibrium state of the fluid, causing the fluid to diffuse in all directions, thereby effectively pushing the extrusion sheet 33 to open outward to ensure the normal passage of the medicine liquid. At the same time, the conical inner cavity gradually formed by the other arc-shaped trajectory can play a certain aggregation role for the diffused fluid after it passes through the extrusion sheet 33 normally, so that the medicine liquid remains stable after diffusion, ensuring its subsequent rapid output effect.

[0037] For details, please refer to the attached manual Fig.10 and attached Fig.11 When the extrusion sheet 33 is in an open position, the spacing of the movable seam 32 increases from top to bottom. When the extrusion sheet 33 is in a closed position, the movable seam 32 is squeezed by the elastic force of the extrusion sheet 33 as a whole, and the whole is in a sealed state.

[0038] The specific implementation method is as follows: by setting the extrusion sheet 33 and the movable seam 32 in different postures, it can be ensured that when the medicine is continuously output, the movable seam 32 on the surface of the extrusion sheet 33 is compressed by the fluid and remains open. At this time, the medicine continues to pass smoothly and the infusion enters the tail end. When the medicine no longer enters the interior of the dropper 1, the extrusion sheet 33 as a whole loses the continuous pressure of the fluid, and thus uses its own elasticity to squeeze the movable seam 32 closed, thereby keeping the overall funnel-shaped structure in a closed state, and at the same time balancing the internal and external air pressures of the dropper 1, so that the remaining medicine at the tail end is not input into the patient's body, thereby bringing extra operation time for medical staff to pull out the injection needle, avoiding air from entering the dropper 1, causing edema and congestion at the puncture point of the patient and other adverse problems.

[0039] Working principle of the present invention:

[0040] Step 1: First, the operator assembles the various components of the device normally, and then uses the device normally.

[0041] Step 2: First, when the normal drug delivery is carried out in the dropper 1, the drug enters the inside of the dropper 1 along the thinner liquid outlet tube 2 under the action of the external atmospheric pressure, and gradually fills the inner cavity of the dropper 1. At this time, the drug flows from top to bottom through the funnel-shaped structure formed by the extrusion sheet 33, and enters the inside of the concave groove 36. The sudden change of its volume from small to large breaks the previous equilibrium state of the fluid, causing the fluid to diffuse in all directions, thereby effectively pushing the extrusion sheet 33 to gradually open outward through the movable seam 32, ensuring that the drug continues to pass smoothly. When the water column pressure inside the dropper 1 is greater than the patient's venous pressure, the liquid in the drug bottle flows into the vein along the hose to continuously complete the infusion process. At this time, the dropper 1 is bounded by the top of the flow-breaking protection sheet 3, and the pressure at its top is greater than the pressure at the bottom. At the same time, the top of the liquid surface of the drug is above the top horizontal plane of the flow-breaking protection sheet 3. When the entire infusion enters the tail end, the infusion When the medicine in the bottle is exhausted and no medicine is replenished into the interior of the dropper 1, the squeezing sheet 33 as a whole will gradually lose the continuous pressure from the medicine fluid. At this time, the elastic force of the squeezing sheet 33 itself is gradually released, so that the elasticity of the squeezing sheet 33 is used to gradually squeeze and close the movable seam 32, and when the medicine is output to a level below the top horizontal plane of the flow-breaking protection sheet 3, the squeezing sheet 33 squeezes the movable seam 32 to a maximum degree of closure, thereby keeping the overall funnel-shaped structure in a closed state, and at the same time, the internal and external air pressures of the dropper 1 are balanced, so that the remaining tail end medicine is no longer input into the patient's body, thereby bringing extra operation time for medical staff to pull out the injection needle, thereby avoiding the entry of air into the dropper 1, causing safety problems such as edema and congestion at the patient's puncture point, and finally the device completes the infusion of the patient. When the infusion process enters the end, the timely protection work process of the medicine in the dropper 1 after the flow is cut off.

[0042] Step 3: First, the operator shuts down the device normally, then checks whether the fixation between the various components of the device is normal, and then replaces and repairs the aging and severely worn parts inside the device.

[0043] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0044] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0045] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An infusion protection device, comprising a dropper, wherein the lower end of the dropper is connected to a liquid outlet pipe, characterized in that: The interior of the dropper is provided with a flow cut-off protection sheet, the flow cut-off protection sheet comprises an annular base plate, a plurality of movable seams are equidistantly provided on the surface of the annular base plate, a plurality of extrusion sheets are formed on the surface of the annular base plate through the plurality of movable seams, the bottom ends of the plurality of extrusion sheets are integrally formed with an arc sheet, a transition arc surface is provided at the connection between the arc sheet and the extrusion sheet, and a concave groove is provided on the inner wall surface of the transition arc surface; The movable seam is distributed parallel to the central axis of the annular base plate in the vertical direction, the extruded sheet is in an arc shape as a whole, and a plurality of the extruded sheets together form a funnel-shaped structure with a large head and a small tail, the curvature of the surface shape of the funnel-shaped structure increases from top to bottom, the arc-shaped sheet is in a lotus petal shape as a whole, and a plurality of the arc-shaped sheets together form a spherical cavity, the inner cavity volume of the funnel-shaped structure composed of the plurality of extruded sheets decreases from top to bottom, and reaches a minimum value at the connection with the arc-shaped sheet, the inner cavity volume of the arc-shaped sheet is greater than the minimum value of the inner cavity volume of the funnel-shaped structure, the midline position of the concave part of the transition arc surface points to the inner side of the extruded sheet, and is located obliquely above the connection between the extruded sheet and the arc-shaped sheet, the bottom end of the arc-shaped sheet gradually forms a spike-shaped structure, and the spike-shaped structures of the plurality of arc-shaped sheets together form a cone; The movable seam and the extrusion sheet satisfy the following rules: When the dropper is in a normal infusion state, the extrusion sheet is affected by the fluid pressure and gradually opens radially through the movable slit; When the dropper is in a cut-off state, the extrusion sheet squeezes the movable slit through its own elastic force to form a closed funnel-shaped closed posture.

2. The infusion protection device according to claim 1, characterized in that: The top end of the dropper is connected with an infusion tube, and the infusion tube and the liquid outlet tube are located on the same central axis.

3. The infusion protection device according to claim 1, characterized in that: A transition fit is adopted between the peripheral side surface of the annular base plate and the inner wall of the dropper, the annular base plate is in an annular shape as a whole, and the annular base plate is in a plane structure.

4. The infusion protection device according to claim 1, characterized in that: The inner wall surface of the concave groove forms two arc tracks, one arc track at the top forms the main spherical cavity structure, and the other arc track cooperates with the spike-like structure at the bottom of the arc sheet to gradually form a conical inner cavity.

5. The infusion protection device according to claim 1, characterized in that: When the extrusion sheet is in an open position, the spacing of the movable seams increases from top to bottom. When the extrusion sheet is in a closed position, the movable seams as a whole are affected by the elastic force of the extrusion sheet, and the whole is in a sealed state.

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