Infusion alarm and infusion alarm method based on hydraulic pressure change

Abstract

The invention belongs to the field of medical instruments, and discloses a hydraulic change-based infusion alarm, which comprises a clamp and an alarm, the alarm is connected with the clamp through a lead; a torsion spring for providing torsion is arranged in the clamp; when the clip is in a natural state, the closed side is a clamping side; the clamping side is provided with a clamping part for clamping an infusion tube; contacts are arranged on the two clamping plates forming the clamping side; when the two contacts are in contact, the contacts, the wire and the alarm are kept in a conducting state, and the alarm gives an alarm. According to the infusion alarm, the characteristics that the infusion tube can provide hydraulic pressure and the flexible infusion tube is easy to extrude are utilized, alarming is achieved through force balance of the clamp and the infusion tube in different deformation states, and the infusion alarm is simple in structure and convenient to use. Meanwhile, the invention further discloses an infusion alarm method.

Description

Technical Field

[0001] The present invention relates to the field of medical equipment, in particular to an infusion alarm. Background Art

[0002] The working principles of infusion alarms vary, such as using photoelectric non-contact detection of the dynamics of drug drops to trigger the circuit, or using the principle of gravity to detect the weight of the infusion bottle.

[0003] CN86210976U discloses a device for detecting the weight of an infusion bottle based on the principle of gravity.

[0004] CN87216747U discloses a device based on the spring weighing principle and specially provided with an adjustable zero point mechanism, which controls the contact point to connect the circuit in a weight-removing manner to realize an alarm.

[0005] CN110464907A discloses an infusion alarm, the core of which is that: a spring clip is correspondingly installed on the outside of the infusion device, the spring clip is arranged at both ends of the Murphy's dropper, and the infusion alarm body is fixed between the two spring clips by bolts, a buffer protection device is correspondingly installed on both sides of the infusion alarm body, and an infrared sensor is fixed at the center of one side of the infusion alarm body by bolts. Detection is performed by displacement.

[0006] No matter it is a gravity-based infusion alarm or a photoelectric-based infusion alarm, a common problem they have is that their structure is too complicated.

[0007] During the diagnosis and treatment process, especially in places with more complicated personnel such as infusion, we hope that the equipment is as simple as possible. On the one hand, overly complicated equipment must have a large weight, which can easily cause the infusion tube to fall off and bring medical risks; on the other hand, it is too complicated to maintain and use, and is not suitable for nurses in non-mechanical fields.

[0008] The technical problem solved in this case is: how to simplify the existing infusion alarm. Summary of the invention

[0009] The purpose of the present invention is to provide an infusion alarm based on hydraulic pressure changes, which utilizes the hydraulic pressure provided by the infusion tube and the characteristics of the flexible infusion tube being easily squeezed, and realizes alarm through the balance of forces between the clip and the infusion tube under different deformation states, and has a simple structure and is easy to use. At the same time, the present invention also discloses an infusion alarm method.

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an infusion alarm based on hydraulic pressure change, comprising a clamp and an alarm; the alarm and the clamp are connected by a wire; the clamp is built with a torsion spring for providing torsion; when the clamp is in a natural state, the side that remains closed is the clamping side;

[0011] The clamping side is provided with a clamping portion for clamping the infusion tube; the two clamping plates constituting the clamping side are provided with contacts; when the two contacts are in contact, the contacts, the wires and the alarm remain in a conducting state, and the alarm sounds an alarm;

[0012] The contact area between the clamp and the infusion tube is s;

[0013] When the clamp is clamped on the infusion tube and there is liquid in the hanging bottle, the clamp squeezes the infusion tube to the first deformation state; the clamping force provided by the clamp is balanced by the sum of the hydraulic pressure provided by the infusion tube at the clamping position and the elastic restoring force generated by the infusion tube being squeezed in the first deformation state; the hydraulic pressure is the product of the contact area s and the hydraulic pressure provided by the infusion tube at the clamping position;

[0014] When the clamp is clamped on the infusion tube and there is no liquid in the infusion tube, the clamp squeezes the infusion tube to a second deformation state; the clamping force provided by the clamp is balanced with the elastic restoring force generated by the infusion tube being squeezed in the second deformation state.

[0015] At the same time, the present invention also discloses an infusion alarm method based on hydraulic pressure change, which is implemented using any of the above-mentioned infusion alarms;

[0016] Clamp the clamp at the set position of the infusion tube and fix the alarm at the bottleneck of the hanging bottle;

[0017] When there is no liquid in the infusion tube, the infusion tube is squeezed to the second deformation state, the contacts come into contact, and the contacts, the wires, and the alarm form an electrical circuit, and the alarm sounds an alarm.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention utilizes the hydraulic pressure provided by the infusion tube and the property that the flexible infusion tube is easily squeezed, and realizes alarm through the force balance between the clamp and the infusion tube under different deformation states. The invention has a simple structure and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of Example 1;

[0021] Figure 2 is a schematic diagram of the clamp when the infusion tube is in a first deformation state;

[0022] Figure 3is a schematic diagram of the clamp when the infusion tube is in the second deformation state. DETAILED DESCRIPTION

[0023] 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.

[0024] Example 1

[0025] refer to Figure 1-3 , an infusion alarm based on hydraulic pressure change, comprising a clamp 1 and an alarm 2; the alarm 2 and the clamp 1 are connected by a wire 3; the clamp 1 is built with a torsion spring 4 for providing torsion; when the clamp 1 is in a natural state, the side that remains closed is a clamping side 5;

[0026] The clamping side 5 is provided with a clamping portion 10 for clamping the infusion tube; the two clamping plates constituting the clamping side 5 are provided with contacts 6; when the two contacts 6 are in contact, the contacts 6, the wire 3, and the alarm 2 remain in a conductive state, and the alarm 2 sounds an alarm;

[0027] The contact area between the clamp 1 and the infusion tube 8 is s;

[0028] When the clamp 1 is clamped on the infusion tube 8 and there is liquid in the hanging bottle, the clamp 1 squeezes the infusion tube to the first deformation state; the clamping force provided by the clamp 1 is balanced by the sum of the hydraulic pressure provided by the infusion tube at the clamping position and the elastic restoring force generated by the infusion tube being squeezed in the first deformation state; the hydraulic pressure is the product of the contact area s and the hydraulic pressure provided by the infusion tube at the clamping position;

[0029] When the clamp 1 is clamped on the infusion tube and there is no liquid in the infusion tube, the clamp 1 squeezes the infusion tube to a second deformation state; the clamping force provided by the clamp 1 is balanced with the elastic restoring force generated by the infusion tube being squeezed in the second deformation state.

[0030] Generally speaking, when there is liquid in the bottle, a hydraulic pressure of 6kPa to 10kPa can be provided at a clamping height of 0.6-1m; the infusion tube is a flexible infusion tube; when manufacturing the clamp 1, clamps 1 with different clamping areas should be manufactured according to the elasticity of different infusion tubes. If the elastic restoring force of the infusion tube is large, the contact area of ​​the clamp 1 should be appropriately reduced; as the contact area decreases, the liquid pressure decreases, and the clamping balance can be maintained; otherwise, the contact area increases to increase the liquid pressure.

[0031] Each type of clamp matches the corresponding model of infusion tube; when using a clamp that matches the infusion tube model, clamp the clamp at the specified height according to the instructions in the manual; when the ambient temperature is relatively low, the hardness of the infusion tube will increase, so when the ambient temperature is low, the clamp can be appropriately moved down 20 to 30 cm; when the ambient temperature is relatively high, the clamp can be appropriately moved up 20 to 30 cm.

[0032] Taking a polyvinyl chloride infusion tube with an outer diameter of 3.2 mm as an example, the height of the clamping side 5 of the clamp 1 is about 1.5 cm. A torsion spring with a wire diameter of 0.3 mm, an outer diameter of 2.5 mm, 6 turns and an angle of 90° can be selected to maintain the balance when the clamping height is 70 cm. At this time, the infusion tube is full of liquid, the infusion tube is slightly deformed, and the contact 6 is not in contact; when there is no liquid in the infusion tube, the infusion tube is flattened and the contact 6 is in contact.

[0033] Therefore, selecting a clamp 1 of appropriate specifications according to the specifications of the infusion tube requires continuous experiments and adjustments in actual applications.

[0034] Preferably, the alarm 2 is fixed to the bottleneck of the hanging bottle 11 by a fixer 7;

[0035] Compared with the traditional solution in which the alarm 2 is hung on the infusion tube, the safety of this solution is significantly improved. The reason is that the clip 1 has a simple structure and is lightweight, and will not pull the infusion tube excessively. The alarm 2 is completely detached from the infusion tube and will not cause the infusion tube to fall off.

[0036] The fastener 7 can be configured as a buckle structure for being snapped onto the sheet at the bottleneck position, and the snapping is stable and easy to disassemble.

[0037] Preferably, the clamp 1 is clamped at a position 0.6 to 1 m away from the top of the infusion tube, and a plug hole 9 is provided on the clamp 1; one end of the wire 3 is a plug end; the plug end is inserted into the plug hole 9;

[0038] In actual operation, the clamp 1 is first clamped on the infusion tube, and then the plug end is inserted into the plug hole, so that the alarm 2 can match the clamps 1 of different specifications.

[0039] More preferably, the clip 1 is a clip 1 made of plastic, which is lighter and has a lower risk of the infusion tube being pulled out. Preferably, the contact 6 is located on the inner side of the free end of the clamping side 5; when the contact 6 is arranged at the free end of the clamping side 5, the displacement amplitude is larger than the degree to which the infusion tube is squeezed, which can avoid the contact 6 being accidentally contacted due to the error of the torsion spring.

[0040] The method of using the infusion alarm of this embodiment is as follows:

[0041] The clamp 1 is clamped at the set position of the infusion tube 8, and the alarm 2 is fixed at the bottleneck position of the hanging bottle 11; at this time, the infusion tube 8 is squeezed and slightly deformed, showing as Figure 2 As the liquid in the hanging bottle 11 is gradually injected into the patient's body, when there is no liquid in the hanging bottle, the liquid in the infusion tube gradually decreases, accompanied by a gradual decrease in the hydraulic pressure in the tube.

[0042] When there is no liquid in the infusion tube 8, the hydraulic pressure in the tube is low, and the infusion tube 8 is squeezed to the second deformation state, the contact 6 contacts, and the contact 6, the wire 3, and the alarm 3 form an electrical circuit, and the alarm sounds an alarm. The alarm is generally sounded by a buzzer. As another alarm method, an alarm message can be sent to the nurse station through a built-in communication module.

[0043] This embodiment utilizes the hydraulic pressure provided by the infusion tube and the property that the flexible infusion tube is easily squeezed, and realizes alarm through the balance of force between the clamp and the infusion tube under different deformation states. It has a simple structure and is easy to use.

Claims

1. An infusion alarm based on hydraulic pressure changes, characterized in that: The device comprises a clip and an alarm; the alarm and the clip are connected by a wire; the clip is provided with a torsion spring for providing torsion; when the clip is in a natural state, the side that remains closed is the clamping side; The clamping side is provided with a clamping portion for clamping the infusion tube; the two clamping plates constituting the clamping side are provided with contacts; when the two contacts are in contact, the contacts, the wires and the alarm remain in a conducting state, and the alarm sounds an alarm; The contact area between the clamp and the infusion tube is s; When the clamp is clamped on the infusion tube and there is liquid in the hanging bottle, the clamp squeezes the infusion tube to a first deformation state; The clamping force provided by the clamp is balanced by the sum of the hydraulic pressure provided by the infusion tube at the clamping position and the elastic restoring force generated by the infusion tube being squeezed in the first deformation state; the hydraulic pressure is the product of the contact area s and the hydraulic pressure provided by the infusion tube at the clamping position; When the clamp is clamped on the infusion tube and there is no liquid in the infusion tube, the clamp squeezes the infusion tube to a second deformation state; The clamping force provided by the clamp is balanced with the elastic restoring force generated by the infusion tube being squeezed in the second deformation state.

2. The infusion alarm based on hydraulic pressure change according to claim 1, characterized in that: The alarm is fixed at the bottleneck position of the hanging bottle through a fixing device.

3. The infusion alarm based on hydraulic pressure change according to claim 1, characterized in that: The clamp is clamped at a position 0.6 to 1 m away from the top of the infusion tube.

4. The infusion alarm based on hydraulic pressure change according to claim 1, characterized in that: The clip is provided with a plug-in hole; one end of the wire is a plug-in end; the plug-in end is inserted into the plug-in hole.

5. The infusion alarm based on hydraulic pressure change according to claim 1, characterized in that: The clip is made of plastic.

6. The infusion alarm based on hydraulic pressure change according to claim 1, characterized in that: The contact point is located inside the free end of the clamping side.

7. A method for infusion alarm based on hydraulic pressure change, characterized in that: Implemented using the infusion alarm as described in any one of claims 1 to 6; Clamp the clamp at the set position of the infusion tube and fix the alarm at the bottleneck of the hanging bottle; When there is no liquid in the infusion tube, the infusion tube is squeezed to the second deformation state, the contacts come into contact, and the contacts, the wires, and the alarm form an electrical circuit, and the alarm sounds an alarm.

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