Hemodialysis needle falling monitoring and alarming device based on metal probe

Abstract

The invention discloses a hemodialysis needle falling monitoring and alarming device based on a metal probe, and relates to the field of medical equipment, and the device comprises the metal probe, a metal lead, a detection circuit, a detection circuit and an alarming circuit; the metal probe is arranged in a preset range with the pricking position of the hemodialysis needle as the center; the input end of the detection circuit is connected with the metal probe through a metal lead, and the detection circuit and the metal probe form an oscillating circuit; the input end of the detection circuit is connected with the output end of the detection circuit, the output end of the detection circuit is connected with the input end of the alarm circuit, and the detection circuit is used for detecting whether the oscillation circuit stops oscillation or not and controlling the alarm circuit to give an alarm when the oscillation circuit does not stop oscillation. According to the invention, the alarm circuit is controlled to carry out needle falling alarm by detecting whether the oscillation circuit stops oscillation or not, so that the structure of the needle falling detection device is simplified, and the convenience of hemodialysis detection is improved.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a blood dialysis needle detachment monitoring and alarming device based on a metal probe. Background Art

[0002] Currently, the existing blood dialysis needle anti-detachment devices are mainly fixing devices and alarming devices. For example, in the patent CN202111037356, a blood dialysis visual needle anti-detachment limb fixing device, which is a blood dialysis device using the mechanical displacement principle, includes a mechanical displacement and a temperature sensor, and the mechanical structure is relatively complex and not convenient to use.

[0003] The existing blood dialysis needle anti-detachment devices mainly focus on the needle fixing strengthening device and the needle detachment alarming device. The existing needle detachment alarming devices mainly detect displacement or temperature changes to achieve alarming, and are relatively complex in structure and high in cost. At the same time, the detection device is directly combined with the dressing, and it is difficult to disassemble, which reduces the use convenience of the dressing to a certain extent. Since the dressing is a disposable medical product and needs to be frequently replaced, this further increases the use cost of the alarming device, thus increasing the technical popularization cost and productization difficulty of the blood dialysis needle detachment alarming device. Summary of the Invention

[0004] The purpose of the present invention is to provide a blood dialysis needle detachment monitoring and alarming device based on a metal probe. The present invention controls the alarming circuit to perform needle detachment alarming by detecting whether the oscillation circuit stops oscillating, simplifies the structure of the needle detachment detection device, and improves the convenience of blood dialysis detection.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] A blood dialysis needle detachment monitoring and alarming device based on a metal probe, the device includes: a metal probe, a metal lead, a detection circuit, a detection circuit and an alarming circuit;

[0007] The metal probe is arranged within a preset range centered on the position where the blood dialysis needle is inserted;

[0008] The input end of the detection circuit is connected to the metal probe through the metal lead, and the detection circuit and the metal probe form an oscillation circuit;

[0009] The input end of the detection circuit is connected to the output end of the detection circuit, the output end of the detection circuit is connected to the input end of the alarming circuit, and the detection circuit is used to detect whether the oscillation circuit stops oscillating, and controls the alarming circuit to perform needle detachment alarming when it does not stop oscillating.

[0010] Optionally, the metal probe specifically includes: an inductor L1 and an inductor L2;

[0011] One end of the inductor L1 serves as the first port of the metal probe;

[0012] One end of the inductor L2 serves as the second port of the metal probe;

[0013] The other end of the inductor L1 and the other end of the inductor L2 are connected as a common end, and the common end serves as the third port of the metal probe;

[0014] The first port of the metal probe, the second port of the metal probe, and the third port of the metal probe are all connected to the detection circuit through the metal leads.

[0015] Optionally, the detection circuit specifically includes: a DC power supply DC1, a thyristor Q1, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R1, and an adjusting potentiometer W;

[0016] The positive pole of the DC power supply DC1 is respectively connected to one end of the capacitor C1, one end of the resistor R1, one end of the capacitor C3, and the third port of the metal probe;

[0017] The other end of the capacitor C1 is respectively connected to the negative pole of the DC power supply DC1, the sliding end of the adjusting potentiometer W, and the first fixed end of the adjusting potentiometer W;

[0018] The other end of the resistor R1 is respectively connected to one end of the capacitor C2 and the base of the thyristor Q1; the other end of the capacitor C2 is connected to the first port of the metal probe;

[0019] The other end of the capacitor C3 is respectively connected to the collector of the thyristor Q1 and the second port of the metal probe;

[0020] The second fixed end of the adjusting potentiometer W is connected to the emitter of the thyristor Q1.

[0021] Optionally, the detection circuit includes: a thyristor Q2, a thyristor Q3, a resistor R2, and a capacitor C4;

[0022] The emitter of the thyristor Q2 is respectively connected to the positive pole of the DC power supply DC1, one end of the capacitor C4, and the emitter of the thyristor Q3;

[0023] The other end of the capacitor C4 is respectively connected to the collector of the thyristor Q2, one end of the resistor R2, and the base of the thyristor Q3;

[0024] The other end of the resistor R2 is connected to the negative pole of the DC power supply DC1.

[0025] Optionally, the alarm circuit includes: an alarm BJQ, an electrolytic capacitor C5, a resistor R3, and a DC power supply DC2;

[0026] The positive pole of the alarm BJQ is respectively connected to the emitter of the thyristor Q3, one end of the capacitor C5, and one end of the resistor R3; the other end of the resistor R3 is connected to the positive pole of the DC power supply DC2;

[0027] The negative pole of the alarm BJQ is respectively connected to the collector of the thyristor Q3, the other end of the capacitor C5, and the negative pole of the power supply DC2.

[0028] Optionally, the alarm BJQ is a buzzer or a wireless signal generator.

[0029] Optionally, one ends of the metal probe and the metal lead are jointly printed on a flexible printed PCB board with a thin film finish.

[0030] Optionally, the device further includes: a fixing patch;

[0031] The fixing patch is attached to the skin surface. The front end of the fixing patch is U-shaped. The rear end of the fixing patch is used to fix the metal probe. The fixing patch specifically includes: an upper non-woven fabric of the fixing patch and a lower non-woven fabric of the fixing patch;

[0032] One end of the metal lead and the metal probe are arranged between the rear ends of the upper non-woven fabric of the fixing patch and the lower non-woven fabric of the fixing patch.

[0033] Optionally, the device further includes a strap;

[0034] The strap is used to fix the detection circuit, the detection circuit, and the alarm circuit to the upper arm.

[0035] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0036] The present invention controls the alarm circuit to perform a needle detachment alarm by detecting whether the oscillation circuit stops oscillating, simplifies the structure of the needle detachment detection device, and improves the convenience of hemodialysis detection. Description of the Drawings

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0038] Figure 1Circuit diagrams of the metal probe, detection circuit, detection circuit, and alarm circuit provided by the embodiments of the present invention;

[0039] Figure 2 Structural connection diagram of a hemodialysis needle detachment monitoring and alarm device based on a metal probe provided by the embodiments of the present invention;

[0040] Figure 3 Structural diagram of the fixing patch provided by the embodiments of the present invention.

[0041] Symbol description:

[0042] Fixing patch - 1, strap - 2, upper non - woven fabric of the fixing patch - 3, lower non - woven fabric of the fixing patch - 4, metal probe - 5, flexible printed PCB board with a thin - film finish - 6, metal lead - 7, metal lead interface - 8, metal needle - 9. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] The purpose of the present invention is to provide a hemodialysis needle detachment monitoring and alarm device based on a metal probe, which controls the alarm circuit to give an alarm for needle detachment by detecting whether the oscillation circuit stops oscillating, simplifies the structure of the needle detachment detection device, and improves the convenience of hemodialysis detection.

[0045] To make the above - mentioned objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0046] As Figure 1 shown, the embodiments of the present invention provide a hemodialysis needle detachment monitoring and alarm device based on a metal probe 5. The device includes: a metal probe 5, a metal lead 7, a detection circuit, a detection circuit, and an alarm circuit.

[0047] The metal probe 5 is arranged within a preset range centered on the position where the hemodialysis needle is inserted; the metal probe 5 specifically includes: an inductor L1 and an inductor L2; the inductor L1 and the inductor L2 are inductors with different numbers of turns.

[0048] One end of the inductor L1 serves as the first port of the metal probe 5; one end of the inductor L2 serves as the second port of the metal probe 5; the other ends of the inductor L1 and the inductor L2 are connected as a common terminal, and the common terminal serves as the third port of the metal probe 5; the first port of the metal probe 5, the second port of the metal probe 5, and the third port of the metal probe 5 are all connected to the detection circuit through the metal lead 7.

[0049] Optionally, the detection circuit further includes a metal lead interface 8, and the metal lead 7 is connected to the detection circuit through the metal lead interface 8.

[0050] The input end of the detection circuit is connected to the metal probe 5 through the metal lead 7, and the detection circuit and the metal probe 5 form an oscillation circuit; one end of the metal probe 5 and the metal lead 7 are jointly printed on a flexible printed PCB board 6 with a thin film finish, and then covered by the thin film finish, which is convenient for medical disinfection to ensure medical safety.

[0051] The detection circuit specifically includes: a DC power supply DC1, a thyristor Q1, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R1, and an adjusting potentiometer W; the positive pole of the DC power supply DC1 is respectively connected to one end of the capacitor C1, one end of the resistor R1, one end of the capacitor C3, and the third port of the metal probe 5; the other end of the capacitor C1 is respectively connected to the negative pole of the DC power supply DC1, the sliding end of the adjusting potentiometer W, and the first fixed end of the adjusting potentiometer W; the other end of the resistor R1 is respectively connected to one end of the capacitor C2 and the base of the thyristor Q1; the other end of the capacitor C2 is connected to the first port of the metal probe 5; the other end of the capacitor C3 is respectively connected to the collector of the thyristor Q1 and the second port of the metal probe 5; the second fixed end of the adjusting potentiometer W is connected to the emitter of the thyristor Q1. The adjusting potentiometer W can change the gain of the oscillation circuit to make the oscillation circuit in a critical oscillation state. When the high-frequency oscillation circuit oscillates normally, the detection and alarm circuit transistor Q2 will conduct in the negative half cycle and discharge and short-circuit the capacitor C4, resulting in the cut-off of the transistor Q3.

[0052] The input end of the detection circuit is connected to the output end of the detection circuit, and the output end of the detection circuit is connected to the input end of the alarm circuit. The detection circuit is used to detect whether the oscillation circuit stops oscillating, and when it does not stop oscillating, it controls the alarm circuit to give an alarm for needle detachment.

[0053] The detection circuit includes: a thyristor Q2, a thyristor Q3, a resistor R2, and a capacitor C4; the emitter of the thyristor Q2 is respectively connected to the positive pole of the DC power supply DC1, one end of the capacitor C4, and the emitter of the thyristor Q3; the other end of the capacitor C4 is respectively connected to the collector of the thyristor Q2, one end of the resistor R2, and the base of the thyristor Q3; the other end of the resistor R2 is connected to the negative pole of the DC power supply DC1.

[0054] The alarm circuit includes: an alarm BJQ, an electrolytic capacitor C5, a resistor R3, and a DC power supply DC2; the positive pole of the alarm BJQ is respectively connected to the emitter of the thyristor Q3, one end of the capacitor C5, and one end of the resistor R3; the other end of the resistor R3 is connected to the positive pole of the DC power supply DC2; the negative pole of the alarm BJQ is respectively connected to the collector of the thyristor Q3, the other end of the capacitor C5, and the negative pole of the power supply DC2. The alarm BJQ is a buzzer or a wireless signal generator.

[0055] When the detection coils L1 and L2 of the metal probe 5 approach the metal needle tip 9, eddy currents will be generated in the metal needle tip 9 and form losses. The oscillating circuit in the critical state stops oscillating due to the reduction of energy, causing the transistor Q2 to cut off. The DC power supply DC1 charges the capacitor C4 through the resistor R2, and the transistor Q3 conducts. At this time, the alarm BJQ is short-circuited and does not alarm. When the detection coils L1 and L2 move away from the metal needle tip 9, the transistor Q3 cuts off, and the DC power supply DC2 charges the electrolytic capacitor C5. After the electrolytic capacitor C5 is charged, it triggers the alarm BJQ to alarm, indicating that the metal needle tip 9 has fallen off.

[0056] As an optional implementation manner, according to the above blood dialysis needle detachment monitoring and alarm device based on the metal probe 5, the device further includes: a fixing patch 1; the fixing patch 1 is attached to the skin surface. The front end of the fixing patch is U-shaped, and the rear end of the fixing patch 1 is used to fix the metal probe 5. The fixing patch 1 specifically includes: an upper non-woven fabric 3 of the fixing patch and a lower non-woven fabric 4 of the fixing patch; one end of the metal lead 7 and the metal probe 5 are arranged between the rear ends of the upper non-woven fabric 3 of the fixing patch and the lower non-woven fabric 4 of the fixing patch. The fixing patch 1 is composed of two upper and lower layers that can be attached together to fix the metal probe 5 and one end of the metal lead 7 inside. The fixing patch 1 is an adhesive tape or a nylon fastener. Further, an inverted pocket can be provided on the lower non-woven fabric 4 of the fixing patch for fixing one end of the metal lead 7 and the metal probe 5. By fixing with the fixing patch 1, the metal probe 5 can be easily installed, disassembled, and frequently replaced, and the repeated use of the metal probe 5 can be realized.

[0057] As Figures 2 - 3 shown, as another optional implementation manner, the device further includes a strap 2.

[0058] The strap 2 is used to fix the detection circuit, the detection circuit, and the alarm circuit to the upper arm.

[0059] The present invention is based on the principle of metal detection. It uses a metal probe to identify whether the metal needle has fallen off, and when the needle falls off, it alarms through the needle-falling alarm module. Based on the alarm circuit, the present invention changes the metal detection to non-metal detection, realizing the alarm for the falling off of the metal needle, that is, it does not alarm when the metal probe detects that there is a metal needle nearby, and alarms when it detects that there is no metal needle around, thereby reminding patients and medical staff to avoid the situation of massive blood loss of patients and reducing the safety hazards of patients. The present invention can also be encapsulated by a flexible printed PCB board and a film finish, which is convenient for medical disinfection and use. Moreover, the structure of the metal probe is thin and light, and it can be applied together with the fixed patch for the metal probe. This is not only convenient for the fixing operation and reuse of the metal probe, but also convenient for the replacement of the fixed patch, with convenient use and low cost. The fixed patch, the metal probe and the circuit of the present invention are independent of each other. While realizing the alarm for the falling off of the needle, it can greatly reduce the use cost of the alarm device, increase the reliability, convenience and comfort of the use of the hemodialysis needle-falling monitoring and alarm device, and is more conducive to the technical popularization and productization of the hemodialysis needle-falling alarm device.

[0060] The various embodiments in this specification are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other.

[0061] Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A blood dialysis needle detachment monitoring and alarming device based on a metal probe, characterized in that The device includes: a metal probe, a metal lead, a detection circuit, a detection circuit, and an alarm circuit; The metal probe is arranged within a preset range centered on the position where the hemodialysis needle penetrates; The input end of the detection circuit is connected to the metal probe through the metal lead, and the detection circuit and the metal probe form an oscillation circuit; The input end of the detection circuit is connected to the output end of the detection circuit, the output end of the detection circuit is connected to the input end of the alarm circuit, and the detection circuit is used to detect whether the oscillation circuit stops oscillating, and controls the alarm circuit to give an alarm when the needle falls off when it does not stop oscillating.

2. The blood dialysis needle detachment monitoring and alarming device based on a metal probe according to claim 1, wherein The metal probe specifically includes: an inductor L1 and an inductor L2; One end of the inductor L1 serves as the first port of the metal probe; One end of the inductor L2 serves as the second port of the metal probe; The other ends of the inductor L1 and the inductor L2 are connected as a common end, and the common end serves as the third port of the metal probe; The first port of the metal probe, the second port of the metal probe, and the third port of the metal probe are all connected to the detection circuit through the metal lead.

3. The blood dialysis needle detachment monitoring and alarming device based on a metal probe according to claim 1, wherein The detection circuit specifically includes: a DC power supply DC1, a thyristor Q1, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R1, and an adjustable potentiometer W; The positive pole of the DC power supply DC1 is respectively connected to one end of the capacitor C1, one end of the resistor R1, one end of the capacitor C3, and the third port of the metal probe; The other end of the capacitor C1 is respectively connected to the negative pole of the DC power supply DC1, the sliding end of the adjustable potentiometer W, and the first fixed end of the adjustable potentiometer W; The other end of the resistor R1 is respectively connected to one end of the capacitor C2 and the base of the thyristor Q1; the other end of the capacitor C2 is connected to the first port of the metal probe; The other end of the capacitor C3 is respectively connected to the collector of the thyristor Q1 and the second port of the metal probe; The second fixed end of the adjustable potentiometer W is connected to the emitter of the thyristor Q1.

4. The blood dialysis needle detachment monitoring and alarming device based on a metal probe according to claim 3, wherein, The detection circuit includes: a thyristor Q2, a thyristor Q3, a resistor R2, and a capacitor C4; The emitter of the thyristor Q2 is respectively connected to the positive pole of the DC power supply DC1, one end of the capacitor C4, and the emitter of the thyristor Q3; The other end of the capacitor C4 is respectively connected to the collector of the thyristor Q2, one end of the resistor R2, and the base of the thyristor Q3; The other end of the resistor R2 is connected to the negative pole of the DC power supply DC1.

5. The blood dialysis needle detachment monitoring and alarming device based on a metal probe according to claim 4, characterized in that, The alarm circuit includes: an alarm BJQ, an electrolytic capacitor C5, a resistor R3, and a DC power supply DC2; The positive pole of the alarm BJQ is respectively connected to the emitter of the thyristor Q3, one end of the capacitor C5, and one end of the resistor R3; the other end of the resistor R3 is connected to the positive pole of the DC power supply DC2; The negative pole of the alarm BJQ is respectively connected to the collector of the thyristor Q3, the other end of the capacitor C5, and the negative pole of the power supply DC2.

6. The blood dialysis needle detachment monitoring and alarming device based on a metal probe according to claim 5, characterized in that, The alarm BJQ is a buzzer or a wireless signal generator.

7. The blood dialysis needle detachment monitoring and alarming device based on a metal probe according to claim 1, characterized in that, One end of the metal probe and the metal lead are printed together on a flexible printed PCB board with a thin film finish.

8. A blood dialysis needle detachment monitoring and alarming device based on a metal probe according to any one of claims 1-7, characterized in that, The device further includes: a fixing patch; The fixing patch is attached to the skin surface. The front end of the fixing patch is U-shaped, and the rear end of the fixing patch is used to fix the metal probe. Specifically, the fixing patch includes: an upper non-woven fabric of the fixing patch and a lower non-woven fabric of the fixing patch; One end of the metal lead and the metal probe are disposed between the rear ends of the upper non-woven fabric of the fixing patch and the lower non-woven fabric of the fixing patch.

9. The blood dialysis needle detachment monitoring and alarming device based on a metal probe according to claim 8, characterized in that, The device further includes a strap; The strap is used to fix the detection circuit, the detection circuit, and the alarm circuit to the upper arm.

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