Remaining needle seepage alarming and prompting device

Abstract

The invention discloses an indwelling needle seepage alarm prompting device which comprises an infusion connecting tube (1), an extension tube (2), a needle tube (3) and a needle head (4), a threaded connecting tube (5) is arranged on the outer side of the end of the infusion connecting tube (1), a conductive film (6) is arranged in the threaded connecting tube (5), and a sealing ring (7) is arranged between the conductive film (6) and the inner wall of the threaded connecting tube (5); a power source shell (8) is arranged on the outer side of the infusion connecting pipe (1), a conductive shell (9) is arranged at one end of the power source shell (8), and a circuit board shell (10) is arranged at the lower end of the power source shell (8). A circuit is triggered through the change of pressure in the remaining needle, seepage alarm prompt is achieved, the structure is stable, and response is rapid.

Description

Technical Field

[0001] The invention relates to the technical field of indwelling needles, in particular to an indwelling needle leakage alarm prompting device. Background Art

[0002] The use of intravenous catheters can reduce the pain caused by repeated venous punctures and the fear of injections in patients, so intravenous catheters are widely used in clinical practice. The patient's physical activities may cause the needle to loosen, and the needle may detach from the blood vessel and penetrate into the subcutaneous tissue of the patient's skin. Due to the long-term infusion of high concentrations, highly irritating drugs will accumulate in the patient's subcutaneous tissue, swelling will occur at the site of the exudate, muscle spasms will occur, and skin necrosis will occur. In order to remind medical staff in time, there is a kind of exudate reminder device, such as the Chinese invention patent with publication number CN116726310A, which discloses a fixing belt, a wristband, and a sensor component; the fixing belt is detachably connected to each other with a wristband on both sides, and the tail ends of the two wristbands are connected by the sensor component; the sensor component includes a shell, a conductive gel, a main board, an alarm, and a battery; the shell carries the conductive gel, and the main board, the alarm and the battery are fixedly arranged inside the shell, and through grooves compatible with the wristbands are arranged on both sides of the shell; the two wristbands are penetrated by the through grooves and connected by the conductive gel in the middle of the shell; the battery, the main board, the conductive gel and the alarm are electrically connected. This type of device mainly produces resistance changes by stretching the conductive gel, and by setting the shortest response time threshold and the minimum response strain threshold of the conductive gel. When the shortest response time threshold and the minimum response strain threshold are exceeded, the alarm will sound. However, this type of device has some problems. If the wristband becomes loose and the conductive gel does not fit the skin, the conductive gel will not come into contact with the exudate, and resistance changes will not be produced, which will affect the alarm prompt effect. Summary of the invention

[0003] The purpose of the present invention is to provide an indwelling needle leakage alarm prompt device. The present invention triggers a circuit through the change of pressure in the indwelling needle to realize the leakage alarm prompt, and has a stable structure and rapid response.

[0004] The technical solution of the present invention is as follows: an indwelling needle leakage alarm prompting device, comprising an infusion connecting tube, an extension tube, a needle tube and a needle, a threaded connecting tube is provided on the outer side of the end of the infusion connecting tube, a conductive film is provided in the threaded connecting tube, and a sealing ring is provided between the conductive film and the inner wall of the threaded connecting tube; a power supply housing is provided on the outer side of the infusion connecting tube, a conductive housing is provided at one end of the power supply housing, a circuit board housing is provided at the lower end of the power supply housing, and the conductive housing, the power supply housing and the circuit board housing are connected in sequence; one end of the conductive housing is connected to the threaded connecting tube, a button battery is provided in the power supply housing, a first conductive sheet is provided in the conductive housing, one end of the first conductive sheet is in contact with and cooperates with the conductive film, a fixing block is provided in the power supply housing, a second conductive sheet is provided at the inner end of the fixing block, and the first conductive sheet and the second conductive sheet are in contact with the positive and negative electrodes of the button battery respectively; a circuit board is provided in the circuit board housing, the circuit board is connected to the conductive film and the second conductive sheet via a line, and a buzzer is provided on the circuit board.

[0005] In the above-mentioned indwelling needle leakage alarm prompt device, a support block is provided in the threaded connection tube, the conductive film is tightly attached to the support block, the sealing ring is tightly attached to the side of the conductive film, and a fixing plate is provided at the end of the threaded connection tube, and a fastening screw is provided on the fixing plate, and the inner end of the fastening screw is in conflict with the sealing ring.

[0006] In the aforementioned indwelling needle leakage alarm prompting device, the threaded connecting tube is threadably connected to the conductive housing.

[0007] In the aforementioned indwelling needle leakage alarm prompt device, a plurality of surrounding elastic sheets are provided on the inner wall of the power supply housing, a clamping block is provided at the end of the elastic sheet, and the plurality of clamping blocks enclose a battery slot, and the button battery is embedded in the battery slot.

[0008] In the aforementioned indwelling needle leakage alarm prompt device, the first conductive sheet includes a fixing strip arranged on the inner port of the conductive shell, and the end of the fixing strip extends to have an inner end and an outer end, the inner end contacts and cooperates with the conductive film, and the outer end contacts the positive terminal of the button battery.

[0009] In the aforementioned indwelling needle leakage alarm prompt device, the fixed block includes a block body, the second conductive sheet is arranged at the inner end of the block body, and the outer end of the block body is provided with an end cover, which is connected to the end of the power supply housing through threads.

[0010] In the aforementioned indwelling needle leakage alarm prompting device, the upper end of the power supply housing is provided with a round hole for the rope to pass through.

[0011] In the aforementioned indwelling needle leakage alarm prompting device, an inclined plate is provided on the needle tube, and a camera is provided on the inclined plate.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. In the present invention, the positive and negative electrodes of the button battery are in contact with the first conductive sheet and the second conductive sheet respectively, the second conductive sheet is connected to the circuit board via the line, and the conductive film is connected to the circuit board via the line. When the needle of the indwelling needle is inserted into the blood vessel, the infusion is carried out normally, the pressure in the infusion connecting tube is relatively stable, and the conductive film does not deform. Therefore, the conductive film will not contact the first conductive sheet, and the entire circuit will not be connected; if the needle is loose and out of the blood vessel, and inserted into the patient's subcutaneous tissue, as the solution accumulates, the pressure in the indwelling needle increases, and the conductive film on the side of the infusion connecting tube is deformed outward and contacts the first conductive sheet, the entire circuit is connected, and the buzzer on the circuit board sounds an alarm to prompt medical staff so that they can take action quickly. The entire alarm prompt structure is stable and responds quickly.

[0014] 2. The edge of the conductive film is pressed by a sealing ring to achieve better sealing and prevent liquid from entering the shell.

[0015] 3. A round hole is provided at the upper end of the power supply housing for the rope to pass through. A housing is added to the outside of the infusion connecting tube, thereby increasing the volume and weight of the indwelling needle. In order to keep the entire device stably fixed at the infusion site of the patient's body, the rope passes through the round hole and is tied to the patient's wrist. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 It is a schematic diagram of the internal structure of the power supply housing;

[0018] Figure 3 is a schematic diagram of a conductive film;

[0019] Figure 4 is a schematic diagram of a first conductive sheet;

[0020] Figure 5 A schematic diagram of a fixed block.

[0021] Explanation of the marks in the accompanying drawings: 1-infusion connecting tube, 2-extension tube, 3-needle tube, 4-needle, 5-threaded connecting tube, 6-conductive film, 7-sealing ring, 8-power supply housing, 9-conductive housing, 10-circuit board housing, 11-button battery, 12-first conductive sheet, 13-fixing block, 14-second conductive sheet, 15-circuit board, 16-buzzer, 17-round hole, 18-inclined plate, 19-camera, 51-support block, 52-fixing sheet, 53-fastening screw, 81-elastic sheet, 82-card block, 83-battery slot, 121-fixing bar, 122-inner end, 123-outer end, 131-block, 132-end cover. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0023] Embodiment: An indwelling needle leakage alarm prompt device comprises an infusion connection tube 1, an extension tube 2, a needle tube 3 and a needle 4, as shown in the attached Figure 1 As shown, the end of the infusion connecting tube 1 is provided with a threaded connecting tube 5, and a conductive film 6 is installed in the threaded connecting tube 5. The conductive film refers to a thin film material with conductive properties, which can transmit electrical signals on a plane and has light transmittance and flexibility. In this embodiment, the conductive film is used to replace the conventional metal sheet mainly based on its flexibility. The pressure in the infusion connecting tube increases, causing the conductive film to deform, and a sealing ring 7 is installed between the conductive film 6 and the inner wall of the threaded connecting tube 5; the threaded connecting tube 5 has a support block 51, the conductive film 6 is tightly attached to the support block 51, and the sealing ring 7 is tightly attached to the side of the conductive film 6. The end of the threaded connecting tube 5 has a fixing plate 52, as shown in the attached Figure 3 As shown, a fastening screw 53 is installed on the fixing plate 52, and the inner end of the fastening screw 53 conflicts with the sealing ring 7. A power supply housing 8 is installed on the outer side of the infusion connecting tube 1. The sealing ring can seal the gap between the edge of the conductive film and the inner wall of the threaded connecting tube to prevent liquid from flowing into the power supply housing. One end of the power supply housing 8 has a conductive housing 9, as shown in the attached Figure 2 As shown, the lower end of the power supply housing 8 has a circuit board housing 10, the threaded connection tube 5 is threadedly connected to the conductive housing 9, which is convenient for disassembly of the threaded connection tube and the conductive housing, and the conductive housing 9, the power supply housing 8 and the circuit board housing 10 are connected in sequence; one end of the conductive housing 9 is connected to the threaded connection tube 5, a button battery 11 is installed in the power supply housing 8, a first conductive sheet 12 is installed in the conductive housing 9, one end of the first conductive sheet 12 is in contact with the conductive film 6, a fixing block 13 is installed in the power supply housing 8, and a second conductive sheet 14 is installed at the inner end of the fixing block 13, and the first conductive sheet 12 and the second conductive sheet 14 are in contact with the positive and negative electrodes of the button battery 11 respectively; a circuit board 15 is installed in the circuit board housing 10, and the circuit board 15 is connected to the conductive film 6 and the second conductive sheet 14 through the line, and the line connected to the conductive film passes through the power supply housing and the conductive housing, and a certain length is reserved for both lines. After the housing is disassembled, when the components are taken out, the line will not be broken due to being too short, and a buzzer 16 is installed on the circuit board 15 to emit an alarm prompt sound. The upper end of the power supply housing 8 has a round hole 17 for the rope to pass through. A housing is added to the outside of the infusion connecting tube, thereby increasing the volume and weight of the indwelling needle. In order to keep the entire device stably fixed at the infusion site of the patient's body, the rope passes through the round hole and is tied to the patient's wrist.

[0024] The inner wall of the power housing 8 is provided with a plurality of surrounding elastic sheets 81, the ends of the elastic sheets 81 have clamping blocks 82, and the plurality of clamping blocks 82 enclose a battery slot 83, and the button battery 11 is embedded in the battery slot 83, which has a simple structure and is easy to disassemble and assemble.

[0025] The first conductive sheet 12 comprises a fixing strip 121 disposed on the inner port of the conductive housing 9, as shown in the attached Figure 4 As shown, the end of the fixing strip 121 extends to include an inner end 122 and an outer end 123, the inner end 122 is in contact with the conductive film 6, and the outer end 123 is in contact with the positive terminal of the button battery 11. The structure is simple, and the first conductive sheet can be in stable contact with the conductive film and the button battery respectively.

[0026] The fixing block 13 includes a block body 131. Figure 5 As shown, the second conductive sheet 14 is arranged at the inner end of the block 131, and the outer end of the block 131 is provided with an end cap 132, which is connected to the end of the power supply housing 8 via a thread, and the fixed block can be removed by rotating the end cap to replace a new button battery. The needle tube 3 is provided with an inclined plate 18, and a camera 19 is provided on the inclined plate 18. The inclined plate can be used to align the camera with the skin where the needle is inserted, and the camera can be used to monitor the skin condition at the infusion site of the patient, monitor whether it is swollen, and whether the skin color is bruised, so as to judge the exudate, and issue an alarm if the skin condition is not ideal.

[0027] The working principle of the present invention is as follows: the positive and negative electrodes of the button battery are in contact with the first conductive sheet and the second conductive sheet respectively, the second conductive sheet is connected to the circuit board via the line, and the conductive film is connected to the circuit board via the line. When the needle of the indwelling needle is inserted into the blood vessel, the infusion is carried out normally, the pressure in the infusion connecting tube is relatively stable, and the conductive film does not deform, so the conductive film will not contact the first conductive sheet, and the entire circuit will not be connected; if the needle is loose and falls out of the blood vessel and inserts into the patient's subcutaneous tissue, as the solution accumulates, the pressure in the indwelling needle increases, the conductive film on the side of the infusion connecting tube is deformed outward and contacts the first conductive sheet, the entire circuit is connected, and the buzzer on the circuit board sounds an alarm to prompt medical staff so that they can take quick action. The entire alarm prompt structure is stable and responds quickly.

Claims

1. An indwelling needle leakage alarm prompting device, comprising an infusion connecting tube (1), an extension tube (2), a needle tube (3) and a needle (4), characterized in that: A threaded connection tube (5) is provided on the outer side of the end of the infusion connection tube (1), a conductive film (6) is provided inside the threaded connection tube (5), and a sealing ring (7) is provided between the conductive film (6) and the inner wall of the threaded connection tube (5); a power supply housing (8) is provided on the outer side of the infusion connection tube (1), a conductive housing (9) is provided at one end of the power supply housing (8), and a circuit board housing (10) is provided at the lower end of the power supply housing (8), and the conductive housing (9), the power supply housing (8) and the circuit board housing (10) are connected in sequence; one end of the conductive housing (9) is connected to the threaded connection tube (5), and a conductive film (6) is provided inside the power supply housing (8). A button battery (11) is provided, a first conductive sheet (12) is provided in a conductive housing (9), one end of the first conductive sheet (12) is in contact with a conductive film (6), a fixing block (13) is provided in a power supply housing (8), a second conductive sheet (14) is provided at the inner end of the fixing block (13), the first conductive sheet (12) and the second conductive sheet (14) are in contact with the positive and negative electrodes of the button battery (11) respectively; a circuit board (15) is provided in the circuit board housing (10), the circuit board (15) is connected to the conductive film (6) and the second conductive sheet (14) via a line, and a buzzer (16) is provided on the circuit board (15).

2. The indwelling needle leakage alarm prompting device according to claim 1, characterized in that: A support block (51) is provided inside the threaded connection tube (5), the conductive film (6) is in close contact with the support block (51), the sealing ring (7) is in close contact with the side of the conductive film (6), a fixing plate (52) is provided at the end of the threaded connection tube (5), a fastening screw (53) is provided on the fixing plate (52), and the inner end of the fastening screw (53) is in contact with the sealing ring (7).

3. The indwelling needle leakage alarm prompting device according to claim 1, characterized in that: The threaded connection pipe (5) is threadably connected to the conductive housing (9).

4. The indwelling needle leakage alarm prompting device according to claim 1, characterized in that: The inner wall of the power source housing (8) is provided with a plurality of surrounding elastic sheets (81), the ends of the elastic sheets (81) are provided with clamping blocks (82), the plurality of clamping blocks (82) enclose a battery slot (83), and the button battery (11) is embedded in the battery slot (83).

5. The indwelling needle leakage alarm prompting device according to claim 1, characterized in that: The first conductive sheet (12) comprises a fixing strip (121) arranged on an inner port of the conductive housing (9); an inner end (122) and an outer end (123) extend from the end of the fixing strip (121); the inner end (122) contacts and cooperates with the conductive film (6); and the outer end (123) contacts the positive terminal of the button battery (11).

6. The indwelling needle leakage alarm prompting device according to claim 1, characterized in that: The fixing block (13) comprises a block body (131), the second conductive sheet (14) is arranged at the inner end of the block body (131), the outer end of the block body (131) is provided with an end cover (132), and the end cover (132) is connected to the end of the power supply housing (8) via threads.

7. The indwelling needle leakage alarm prompting device according to claim 1, characterized in that: The upper end of the power supply housing (8) is provided with a round hole (17) for the rope to pass through.

8. The indwelling needle leakage alarm prompting device according to claim 1, characterized in that: The needle tube (3) is provided with an inclined plate (18), and the inclined plate (18) is provided with a camera (19).

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