CN215534352U - Device for collecting blood flow signals of arteriovenous internal fistula - Google Patents
Device for collecting blood flow signals of arteriovenous internal fistula Download PDFInfo
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- CN215534352U CN215534352U CN202121272148.2U CN202121272148U CN215534352U CN 215534352 U CN215534352 U CN 215534352U CN 202121272148 U CN202121272148 U CN 202121272148U CN 215534352 U CN215534352 U CN 215534352U
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- 230000017531 blood circulation Effects 0.000 title claims abstract description 13
- 206010016717 Fistula Diseases 0.000 title abstract description 22
- 230000003890 fistula Effects 0.000 title abstract description 22
- 238000012545 processing Methods 0.000 claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims description 147
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 206010003226 Arteriovenous fistula Diseases 0.000 claims 3
- 208000020832 chronic kidney disease Diseases 0.000 description 6
- 238000001631 haemodialysis Methods 0.000 description 5
- 230000000322 hemodialysis Effects 0.000 description 5
- 238000000502 dialysis Methods 0.000 description 4
- 208000007536 Thrombosis Diseases 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 208000005189 Embolism Diseases 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 208000028208 end stage renal disease Diseases 0.000 description 2
- 201000000523 end stage renal failure Diseases 0.000 description 2
- 230000010365 information processing Effects 0.000 description 2
- 235000008446 instant noodles Nutrition 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 239000003146 anticoagulant agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 230000002537 thrombolytic effect Effects 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
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Abstract
The utility model discloses a device for collecting arteriovenous internal fistula blood flow signals, which comprises an electret sound pick-up, a power amplifier, a power supply module, a central processing unit and a loudspeaker, wherein the electret sound pick-up is connected with the power amplifier; the electret pick-up and the power supply module are electrically connected with the power amplifier, and the central processing unit is electrically connected with the loudspeaker, the power amplifier and the power supply module; the utility model provides a device for collecting arteriovenous internal fistula blood flow signals, which has the advantages of small equipment volume, relatively low cost, convenience for patients to use and convenience for self-management of the patients.
Description
Technical Field
The utility model relates to the technical field of human body signal acquisition, in particular to a device for acquiring a blood flow signal of an arteriovenous internal fistula.
Background
At present, the incidence of Chronic Kidney Disease (CKD) is gradually increased year by year, the global prevalence rate of general population is as high as 14.3%, and the prevalence rate of CKD of people over 18 years old in China is 10.8%. Patients with CKD have poor disease control and will develop end-stage renal disease, and once end-stage renal disease is reached, hemodialysis will become the most commonly used alternative treatment for kidney.
Autologous arteriovenous internal fistula (AVF) is the first vascular access route to perform dialysis treatments. The unobstructed AVF is the "lifeline" that maintains hemodialysis patients. According to statistics, the hospitalized patients caused by internal fistula embolism after fistulization account for 15% -24% of dialysis hospitalized patients, and the internal fistula embolism is one of the main reasons for shortening the service life of a fistula passage and even leading to death of the dialysis patients. Research shows that the thrombolytic therapy has higher requirement on the thrombus formation time of the internal fistula, generally has better effect within 6 hours and has poor effect within 48 hours.
Therefore, as hemodialysis patients increase year by year, 2019.12.31 the number of hemodialysis patients in China is 63 million. The method is simple and easy to implement, can be used for routine monitoring of arteriovenous internal fistula of an elderly hemodialysis patient, timely judging the unblocked condition of the arteriovenous internal fistula, prolonging the service life of the internal fistula and having certain clinical value. Currently, relevant colleges and universities or research institutions start to start the research of fistula health monitoring of dialysis patients at home and abroad. Most of them rely on hospital instruments for this purpose, however, such devices are expensive, bulky, unable to perform all-weather tests, invasive in themselves and require professional personnel to perform the tests. Some hospitals also adopt manual detection, but are mostly used for clinic, and when the internal fistula condition is monitored conventionally, blood vessel noise can be mixed, so that accurate judgment is not easy.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes the defects of the prior art, and provides the device for collecting the arteriovenous internal fistula blood flow signals, which has the advantages of small equipment volume, relatively low cost, convenience for patients to use and convenience for self-management of the patients.
The technical scheme of the utility model is as follows:
a device for collecting blood flow signals of an arteriovenous internal fistula comprises an electret sound pick-up, a power amplifier, a power supply module, a central processing unit and a loudspeaker; the electret pick-up and the power supply module are electrically connected with the power amplifier, and the central processing unit is electrically connected with the loudspeaker, the power amplifier and the power supply module;
the whole device is cuboid, and an electret pickup is arranged in the middle of one short side; the middle position of the front surface of the device is provided with a loudspeaker, and sound holes are distributed on the surface of the device; the left side of the upper part of the front surface of the device is provided with a power supply control button, and the right side is provided with a volume knob; the power supply is arranged in the middle of the back of the device and is fixed through the buckle type power supply cover plate.
Further, the speaker completely covers all the sound outlet holes.
Further, the power amplifier includes an integrated chip U1, an operational amplifier U2B, an operational amplifier U2C, an inductor L1, a capacitor C1, a capacitor C3, a capacitor C4, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C12, a capacitor C13, a capacitor C19, a capacitor C20, a capacitor C30, a resistor R1, a resistor R2, a resistor R3, a resistor R5, a resistor R7, a resistor R8, a resistor R13, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R20, a resistor R24, a polar capacitor E1, a polar capacitor E2, a polar capacitor E4, and a polar capacitor E6;
a No. 1 pin of the integrated chip U1 is connected with one end of an inductance coil L1 and one end of a capacitor C1; the No. 2 pin of the integrated chip U1 is connected with one end of a resistor R1 and the other end of a capacitor C1; the terminal 3 of the capacitor C1 is grounded;
the other end of the inductance coil L1 is connected with one end of a capacitor C3, one end of a polar capacitor E2 and one end of a resistor R3; the other end of the capacitor C3 and the other end of the polar capacitor E2 are grounded; the other end of the resistor R3 is connected with one end of the capacitor C4 and one end of the polar capacitor E4; the other end of the capacitor C4 and the other end of the polar capacitor E4 are grounded;
the other end of the resistor R1 is connected with one end of a resistor R10, one end of a capacitor C8 and one end of a resistor R2; the other end of the resistor R10 and the other end of the capacitor C8 are grounded; the other end of the resistor R2 is connected with one end of the capacitor C9 and a pin No. 10 of the operational amplifier U2C; the other end of the capacitor C9 is grounded;
a pin 9 of the operational amplifier U2C is connected with one end of a capacitor C12, one end of a resistor R12, one end of a capacitor C10 and the other end of a resistor R11, and the other end of the capacitor C10 is grounded; one end of the resistor R11 is connected with the other end of the resistor R20, one end of the resistor R20 is connected with one end of the polar capacitor E1, and the other end of the polar capacitor E1 is grounded; a pin 8 of the operational amplifier U2C is connected with one end of the resistor R5, the other end of the capacitor C12, the other end of the resistor R12 and one end of the capacitor C19, and the other end of the capacitor C19 is grounded; the other end of the resistor R5 is connected with one end of a polar capacitor E6 and one end of a capacitor C13, and the other end of the capacitor C13 is grounded;
a No. 6 pin of the operational amplifier U2B is connected with the other end of the polar capacitor E6, one end of the resistor R7 and one end of the capacitor C7; a pin 7 of the operational amplifier U2B is connected with the other end of the capacitor C7, the other end of the resistor R7 and one end of the resistor R24, the other end of the resistor R24 is connected with one end of the capacitor C30 and VIN, and the other end of the capacitor C30 is grounded; pin No. 5 of the operational amplifier U2B is connected to one end of the capacitor C20, the other end of the resistor R8, and one end of the resistor R13, the other end of the capacitor C20 and the other end of the resistor R13 are grounded, and one end of the resistor R8 is connected to VCC.
The utility model adopts an electret sound pick-up, a power amplifier, a power supply module, a central processing unit and a loudspeaker. The electret pick-up and the power supply module are electrically connected with the power amplifier, and the central processing unit is electrically connected with the loudspeaker, the power amplifier and the power supply module. Information is collected through the electret sound pick-up on the whole, signals are amplified through the power amplifier, information processing is carried out through the central processing unit, and different warning sounds are emitted by the loudspeaker after the signals are processed.
The power control button is arranged on the left side of the upper portion of the front face of the device and connected with the power module to control the work of the power module, the power module can be a battery under general conditions, and a storage battery can be naturally adopted and can be externally connected to charge the storage battery. The right side is provided with a volume knob which is directly connected with the loudspeaker to control the volume of the loudspeaker. The power supply is arranged in the middle of the back of the device and is fixed through the buckle type power supply cover plate, and the power supply module of the instant noodle maker is convenient to replace through the power supply cover plate. The whole structure is simple and reasonable, the carrying is convenient, the clinical requirement is met, and the device is practical and convenient.
The signal of this power amplifier collection is very accurate, and it provides effectual data and supplies central processing unit to handle, can realize tentatively judging out fistula blood flow, when this device detects out the problem, can in time inform medical personnel to carry out more accurate equipment secondary and detect. The information collected by the power amplifier can provide good self-management requirements for patients, establish good compliance, realize detection and early warning of early internal fistula thrombus blockage, and meet clinical requirements.
Drawings
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a schematic front view of the apparatus of the present invention;
FIG. 3 is a schematic reverse side view of the apparatus of the present invention;
FIG. 4 is a circuit diagram of a power amplifier of the present invention;
the labels in the figure are: electret adapter 1, power control button 2, volume knob 3, sound outlet 4, power apron 5.
Detailed Description
The utility model is further described with reference to the following figures and detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Example (b):
as shown in fig. 1 to 4, a device for collecting blood flow signals of an arteriovenous internal fistula comprises an electret sound pick-up 1, a power amplifier, a power supply module, a central processing unit and a loudspeaker. The electret pick-up 1 and the power module are electrically connected with the power amplifier, and the central processing unit is electrically connected with the loudspeaker, the power amplifier and the power module. Gather information through electret adapter 1 on the whole, through power amplifier with signal amplification, carry out information processing by central processing unit, send different warning sounds by the speaker afterwards. The power supply module supplies power to the power amplifier and the central processing unit.
This device wholly is the cuboid, and the intermediate position of one of them minor face sets up electret adapter 1. The middle position of the front surface of the device is provided with a loudspeaker, and sound holes 4 are distributed on the surface of the device. The loudspeaker completely covers all the sound outlet openings 4. The power control button 2 is arranged on the left side of the upper portion of the front face of the device and connected with the power module to control the work of the power module, and the power module can be a battery under general conditions, and can be a storage battery naturally and externally connected to charge the storage battery. The right side is provided with a volume knob 3 which is directly connected with the loudspeaker to control the volume of the loudspeaker. The back intermediate position of this device sets up the power, and fixes through buckle formula power apron 5, comes the change of instant noodle power module through power apron 5.
Preferably, the rest of the apparatus is of conventional design, or of conventional design by a person skilled in the art. The power amplifier has an important influence on the accuracy of subsequently acquired information, so that the specific power amplifier design circuit adopted by the scheme is as follows:
the circuit comprises an integrated chip U1, an operational amplifier U2B, an operational amplifier U2C, an inductance coil L1, a capacitor C1, a capacitor C3, a capacitor C4, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C12, a capacitor C13, a capacitor C19, a capacitor C20, a capacitor C30, a resistor R1, a resistor R2, a resistor R3, a resistor R5, a resistor R7, a resistor R8, a resistor R13, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R20, a resistor R24, a polar capacitor E1, a polar capacitor E2, a polar capacitor E4 and a polar capacitor E6.
Pin No. 1 of the ic U1 is connected to one end of the inductor L1 and one end of the capacitor C1. The pin 2 of the integrated chip U1 is connected to one end of the resistor R1 and the other end of the capacitor C1. Terminal 3 of capacitor C1 is connected to ground.
The other end of the inductor L1 is connected to one end of a capacitor C3, one end of a polar capacitor E2, and one end of a resistor R3. The other terminal of the capacitor C3 and the other terminal of the polar capacitor E2 are grounded. The other end of the resistor R3 is connected to one end of the capacitor C4 and one end of the polar capacitor E4. The other terminal of the capacitor C4 and the other terminal of the polar capacitor E4 are grounded.
The other end of the resistor R1 is connected to one end of the resistor R10, one end of the capacitor C8, and one end of the resistor R2. The other end of the resistor R10 and the other end of the capacitor C8 are grounded. The other end of the resistor R2 is connected with one end of the capacitor C9 and the No. 10 pin of the operational amplifier U2C. The other terminal of the capacitor C9 is connected to ground.
The pin 9 of the operational amplifier U2C is connected to one end of the capacitor C12, one end of the resistor R12, one end of the capacitor C10, and the other end of the resistor R11, and the other end of the capacitor C10 is grounded. One end of the resistor R11 is connected to the other end of the resistor R20, one end of the resistor R20 is connected to one end of the polar capacitor E1, and the other end of the polar capacitor E1 is grounded. The pin 8 of the operational amplifier U2C is connected to one end of the resistor R5, the other end of the capacitor C12, the other end of the resistor R12, and one end of the capacitor C19, and the other end of the capacitor C19 is grounded. The other end of the resistor R5 is connected to one end of the polar capacitor E6 and one end of the capacitor C13, and the other end of the capacitor C13 is grounded.
The pin No. 6 of the operational amplifier U2B is connected to the other end of the polar capacitor E6, one end of the resistor R7, and one end of the capacitor C7. The pin 7 of the operational amplifier U2B is connected to the other end of the capacitor C7, the other end of the resistor R7, and one end of the resistor R24, the other end of the resistor R24 is connected to one end of the capacitor C30 and VIN, and the other end of the capacitor C30 is grounded. Pin No. 5 of the operational amplifier U2B is connected to one end of the capacitor C20, the other end of the resistor R8, and one end of the resistor R13, the other end of the capacitor C20 and the other end of the resistor R13 are grounded, and one end of the resistor R8 is connected to VCC.
The signal of this power amplifier collection is very accurate, and it provides effectual data and supplies central processing unit to handle, can realize tentatively judging out fistula blood flow, when this device detects out the problem, can in time inform medical personnel to carry out more accurate equipment secondary and detect. The information collected by the power amplifier can provide good self-management requirements for patients, establish good compliance, realize detection and early warning of early internal fistula thrombus blockage, and meet clinical requirements.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the spirit of the present invention, and these modifications and decorations should also be regarded as being within the scope of the present invention.
Claims (3)
1. The utility model provides a device that is used for internal arteriovenous fistula blood flow signal to gather which characterized in that: the electret microphone comprises an electret microphone, a power amplifier, a power supply module, a central processing unit and a loudspeaker; the electret pick-up and the power supply module are electrically connected with the power amplifier, and the central processing unit is electrically connected with the loudspeaker, the power amplifier and the power supply module;
the whole device is cuboid, and an electret pickup is arranged in the middle of one short side; the middle position of the front surface of the device is provided with a loudspeaker, and sound holes are distributed on the surface of the device; the left side of the upper part of the front surface of the device is provided with a power supply control button, and the right side is provided with a volume knob; the power supply is arranged in the middle of the back of the device and is fixed through the buckle type power supply cover plate.
2. The device for arteriovenous fistula blood flow signal acquisition of claim 1 wherein: the speaker completely covers all the sound outlet holes.
3. The device for arteriovenous fistula blood flow signal acquisition of claim 1 wherein: the power amplification module comprises an integrated chip U1, an operational amplifier U2B, an operational amplifier U2C, an inductor L1, a capacitor C1, a capacitor C3, a capacitor C4, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C12, a capacitor C13, a capacitor C19, a capacitor C20, a capacitor C30, a resistor R1, a resistor R2, a resistor R3, a resistor R5, a resistor R7, a resistor R8, a resistor R13, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R20, a resistor R24, a polar capacitor E1, a polar capacitor E2, a polar capacitor E4 and a polar capacitor E6;
a No. 1 pin of the integrated chip U1 is connected with one end of an inductance coil L1 and one end of a capacitor C1; the No. 2 pin of the integrated chip U1 is connected with one end of a resistor R1 and the other end of a capacitor C1; the terminal 3 of the capacitor C1 is grounded;
the other end of the inductance coil L1 is connected with one end of a capacitor C3, one end of a polar capacitor E2 and one end of a resistor R3; the other end of the capacitor C3 and the other end of the polar capacitor E2 are grounded; the other end of the resistor R3 is connected with one end of the capacitor C4 and one end of the polar capacitor E4; the other end of the capacitor C4 and the other end of the polar capacitor E4 are grounded;
the other end of the resistor R1 is connected with one end of a resistor R10, one end of a capacitor C8 and one end of a resistor R2; the other end of the resistor R10 and the other end of the capacitor C8 are grounded; the other end of the resistor R2 is connected with one end of the capacitor C9 and a pin No. 10 of the operational amplifier U2C; the other end of the capacitor C9 is grounded;
a pin 9 of the operational amplifier U2C is connected with one end of a capacitor C12, one end of a resistor R12, one end of a capacitor C10 and the other end of a resistor R11, and the other end of the capacitor C10 is grounded; one end of the resistor R11 is connected with the other end of the resistor R20, one end of the resistor R20 is connected with one end of the polar capacitor E1, and the other end of the polar capacitor E1 is grounded; a pin 8 of the operational amplifier U2C is connected with one end of the resistor R5, the other end of the capacitor C12, the other end of the resistor R12 and one end of the capacitor C19, and the other end of the capacitor C19 is grounded; the other end of the resistor R5 is connected with one end of a polar capacitor E6 and one end of a capacitor C13, and the other end of the capacitor C13 is grounded;
a No. 6 pin of the operational amplifier U2B is connected with the other end of the polar capacitor E6, one end of the resistor R7 and one end of the capacitor C7; a pin 7 of the operational amplifier U2B is connected with the other end of the capacitor C7, the other end of the resistor R7 and one end of the resistor R24, the other end of the resistor R24 is connected with one end of the capacitor C30 and VIN, and the other end of the capacitor C30 is grounded; pin No. 5 of the operational amplifier U2B is connected to one end of the capacitor C20, the other end of the resistor R8, and one end of the resistor R13, the other end of the capacitor C20 and the other end of the resistor R13 are grounded, and one end of the resistor R8 is connected to VCC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121272148.2U CN215534352U (en) | 2021-06-08 | 2021-06-08 | Device for collecting blood flow signals of arteriovenous internal fistula |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121272148.2U CN215534352U (en) | 2021-06-08 | 2021-06-08 | Device for collecting blood flow signals of arteriovenous internal fistula |
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| Publication Number | Publication Date |
|---|---|
| CN215534352U true CN215534352U (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121272148.2U Active CN215534352U (en) | 2021-06-08 | 2021-06-08 | Device for collecting blood flow signals of arteriovenous internal fistula |
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| Country | Link |
|---|---|
| CN (1) | CN215534352U (en) |
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- 2021-06-08 CN CN202121272148.2U patent/CN215534352U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Ningbo Chengxiang Technology Co.,Ltd. Assignor: ZHEJIANG University Contract record no.: X2024330000011 Denomination of utility model: A device for collecting blood flow signals in arteriovenous fistula Granted publication date: 20220118 License type: Exclusive License Record date: 20240129 |
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| EE01 | Entry into force of recordation of patent licensing contract |