CN113332510A - Hemodialysis is with alarm device and hemodialysis machine of pjncture needle slippage - Google Patents
Hemodialysis is with alarm device and hemodialysis machine of pjncture needle slippage Download PDFInfo
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- CN113332510A CN113332510A CN202110735761.1A CN202110735761A CN113332510A CN 113332510 A CN113332510 A CN 113332510A CN 202110735761 A CN202110735761 A CN 202110735761A CN 113332510 A CN113332510 A CN 113332510A
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- alarm
- signal
- hemodialysis
- voltage signal
- unit
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- 238000001631 haemodialysis Methods 0.000 title claims abstract description 56
- 230000000322 hemodialysis Effects 0.000 title claims abstract description 56
- 239000008280 blood Substances 0.000 claims abstract description 23
- 210000004369 blood Anatomy 0.000 claims abstract description 23
- 238000012544 monitoring process Methods 0.000 claims abstract description 18
- 230000005284 excitation Effects 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 claims description 3
- 206010011409 Cross infection Diseases 0.000 abstract description 4
- 206010029803 Nosocomial infection Diseases 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 8
- 238000000502 dialysis Methods 0.000 description 6
- 230000017531 blood circulation Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 208000009304 Acute Kidney Injury Diseases 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 208000032843 Hemorrhage Diseases 0.000 description 1
- 208000032456 Hemorrhagic Shock Diseases 0.000 description 1
- 208000033626 Renal failure acute Diseases 0.000 description 1
- 206010049771 Shock haemorrhagic Diseases 0.000 description 1
- 231100000643 Substance intoxication Toxicity 0.000 description 1
- 206010070863 Toxicity to various agents Diseases 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 201000011040 acute kidney failure Diseases 0.000 description 1
- 208000012998 acute renal failure Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000023555 blood coagulation Effects 0.000 description 1
- 230000036772 blood pressure Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 208000020832 chronic kidney disease Diseases 0.000 description 1
- 208000022831 chronic renal failure syndrome Diseases 0.000 description 1
- 230000004087 circulation Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000004941 influx Effects 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000008359 toxicosis Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/18—General characteristics of the apparatus with alarm
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/70—General characteristics of the apparatus with testing or calibration facilities
Abstract
The invention provides a sensitive, quick, non-contact and cross-infection-risk-free hemodialysis puncture needle slippage alarm device and a hemodialysis machine. The alarm device includes: a monitoring unit and an alarm unit, the monitoring unit having: a signal generator having a coil through which a hemodialysis tube passes, the signal generator generating an induced current in a blood circuit circulating in the hemodialysis tube by applying an excitation electric signal to the coil; a signal receiver that receives a voltage signal corresponding to the induced current; and the judging part judges whether the puncture needle connected with the two ends of the hemodialysis pipeline is separated from the human body according to whether the signal receiver receives the voltage signal or the received voltage signal, and the alarm unit is connected with the monitoring unit and gives an alarm in response to the judgment result of the judging part.
Description
Technical Field
The invention relates to an alarm device for the slippage of a puncture needle for hemodialysis and a hemodialysis machine integrated with the alarm device.
Background
Hemodialysis is an effective measure for treating various acute and chronic renal failure and toxicosis and drug intoxication. At present, hemodialysis is widely applied to various clinical disciplines and is listed as a conventional treatment means.
Hemodialysis safety events still occur from time to time. Among them, needle slippage is one of the most serious and fatal safety incidents.
During hemodialysis, patient blood flows through the extracorporeal dialysis system at a rate of 200-. Once the puncture needle slips, the blood of the patient is largely lost in a short time, and if the blood is not found in time, hemorrhagic shock and even death can be caused.
The existing dialysis machine alarm system mainly senses events which can cause the change of the blood pressure of the pipeline through a pipeline pressure sensor, such as the slippage of a puncture needle and the like.
Disclosure of Invention
Problems to be solved by the invention
However, since the venous pressure span of dialysis patients is often large (20-180mmHg), the venous pressure change caused by the slippage of the puncture needle of the patient often cannot trigger the existing alarm system in time, and the fatal danger of finding the delay of the slippage of the puncture needle occurs. In addition, after the puncture needle is separated, a certain time is needed to cause the blood flow pressure change in the tube, a large amount of bleeding often exists at the moment, and the existing alarm system cannot sense and alarm immediately after the separation.
In addition, the pressure measurement portion of existing alarm systems is not isolated from the blood flow, and there is a possibility of contamination and blood influx into the dialysis machine.
The present invention has been made to solve the above problems, and an object of the present invention is to provide a puncture needle slippage warning device and a hemodialysis machine incorporating the same, which are sensitive, fast, non-contact, and free from cross-infection risk.
Means for solving the problems
The first aspect of the present invention is a hemodialysis puncture needle slippage warning device, including: a monitoring unit and an alarm unit, the monitoring unit having: a signal generator having a coil through which a hemodialysis tube passes, the signal generator generating an induced current in a blood circuit circulating in the hemodialysis tube by applying an excitation electric signal to the coil; a signal receiver that receives a voltage signal corresponding to the induced current; and the judging part judges whether the puncture needle connected with the two ends of the hemodialysis pipeline is separated from the human body according to whether the signal receiver receives the voltage signal or the received voltage signal, and the alarm unit is connected with the monitoring unit and gives an alarm in response to the judgment result of the judging part.
In the above alarm device, when the signal receiver does not receive the voltage signal or the received voltage signal does not reach the preset range, the monitoring unit determines that at least one puncture needle is disengaged, the alarm unit gives an alarm, when the signal receiver receives the voltage signal and the voltage signal reaches the preset range, the monitoring unit determines that the puncture needles are not disengaged, and the alarm unit does not give an alarm.
In the above alarm device, the signal generator further includes a power supply, a resistor, and a signal transmitting portion, the power supply, the resistor, and the signal transmitting portion are connected in series with the coil, and the signal transmitting portion outputs an excitation electrical signal to the coil.
In the alarm device, the power supply is a direct current stabilized power supply.
In the above alarm device, the excitation electrical signal is a direct current square wave signal.
In the alarm device, the frequency range of the direct current square wave signal is 50HZ to 100HZ, the duty ratio is 50%, and the amplitude is 24V.
In the above alarm device, the signal receiver includes a current sensor and an oscilloscope, the current sensor has an annular sensing unit, when the hemodialysis tube passes through the sensing unit, the sensing unit detects the induced current in the blood circuit, and the oscilloscope is connected to the current sensor and receives a voltage signal corresponding to the induced current.
The alarm device further comprises an alarm terminal, the alarm terminal is installed in the nurse station and is provided with an alarm display lamp corresponding to the hospital bed number, the alarm terminal is connected with the alarm unit in a communication mode and receives the alarm signal sent by the alarm unit, and the alarm display lamp flickers when receiving the alarm signal.
A second aspect of the present invention is a hemodialysis machine incorporating the alarm device according to any one of claims 1 to 9.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the invention, the puncture needle slippage alarm device and the hemodialysis machine integrated with the same are provided, which are sensitive, rapid, non-contact and free of cross infection risk, so that safety events caused by slippage of the puncture needle are reduced, and the burden of blood purification nursing is also reduced.
Drawings
Fig. 1 is a schematic view of a puncture needle slippage warning device according to an embodiment of the present invention.
Fig. 2 is a diagram showing a configuration of a signal generator according to an embodiment of the present invention and a connection mode between the signal generator and a hemodialysis line.
Fig. 3 is a block diagram of a signal receiver of an embodiment of the present invention.
Fig. 4 is a diagram showing a connection mode between a signal receiver and a hemodialysis tube in the embodiment of the present invention.
Fig. 5 is a flowchart illustrating the operation of the puncture needle slippage warning device according to the embodiment of the present invention.
Fig. 6 is a schematic block diagram of a hemodialysis machine incorporating an alarm device according to an embodiment of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Detailed description of the preferred embodiments
Fig. 1 is a schematic diagram of a puncture needle slippage warning device 100 according to an embodiment of the present invention. In fig. 1, only the puncture needles a and b, the hemodialysis line 1, and the puncture needle slip alarm device 100 are shown, and the hemodialysis machine is not shown.
As shown in fig. 1, a puncture needle a and a puncture needle b are connected to both ends of the hemodialysis tube 1. The puncture needles a and b are punctured in a patient, one end of each puncture needle leads blood out of the patient, and the other end of each puncture needle leads the blood after extracorporeal circulation back to the patient.
After the puncture is completed, blood flows through the hemodialysis tube 1 to form a blood circuit.
The puncture needle slip alarm device 100 comprises a monitoring unit 120 and an alarm unit 110. The monitoring unit 120 is a functional unit for determining whether or not the puncture needle is detached from the human body, and includes a signal generator 120A, a signal receiver 120B, and a determination unit 120C. The signal generator 120A and the signal receiver 120B are connected to the hemodialysis line 1, respectively, in a manner to be described in detail later. The alarm unit 110 is a functional unit that generates an alarm based on the determination result of the monitoring unit 120, and is connected to the monitoring unit 120.
Next, the configuration of the signal generator 120A and the connection method of the coil 4 and the hemodialysis line 1 in the signal generator 120A will be described with reference to fig. 2.
Fig. 2 is a diagram showing the configuration of the signal generator 120A and the connection mode of the signal generator 120A and the hemodialysis line 1 according to the embodiment of the present invention. In fig. 2, only a part of the hemodialysis line 1 is shown.
As shown in fig. 2, the signal generator 120A includes a power source 2, a resistor 3, a coil 4, and a signal transmitter 5, and the power source 2, the resistor 3, the coil 4, and the signal transmitter 5 are connected in series. The power supply 2 is, for example, a dc regulated power supply, and supplies a voltage of 24V to the signal transmitter. The resistor 3 is, for example, a resistor having a resistance of 50 Ω. Here, the magnitude of the voltage supplied by the power source 2 and the resistance value of the resistor 3 are not limited to these values, as long as a stable voltage signal can be obtained at the signal receiver side.
The coil 4 is wound on a cylindrical bobbin (not shown) having an inner diameter of 19mm by using, for example, 0.2mm enameled copper wire, and has 100 turns. The hemodialysis tube 1 passes through the cylindrical bobbin so that the signal transmitter does not contact blood.
The signal transmitting section 5 applies an excitation electric signal, preferably a direct current square wave signal having a frequency range of 50Hz to 100Hz, a duty ratio of 50% and an amplitude of 24V, to the coil 4 to generate a varying magnetic field around the coil 4. Based on the principle of electromagnetic induction, an induced current is generated in a blood circuit flowing through the hemodialysis tube 1. If the applied frequency is less than 50Hz, the electrical signal is weak, and the induced current generated in the blood circuit is also weak and difficult to detect; if the applied frequency is greater than 100Hz, the electrical signal is too strong and may have an adverse effect on the patient's body.
Next, the configuration of the signal receiver 120B and the connection method between the current sensor 6 and the hemodialysis tube 1 in the signal receiver 120B will be described with reference to fig. 3 and 4.
Fig. 3 is a block diagram of a signal receiver 120B according to an embodiment of the present invention. Fig. 4 is a diagram showing a connection mode between the signal receiver 120B and the hemodialysis tube 1 according to the embodiment of the present invention. In fig. 4, only a part of the hemodialysis line 1 is shown.
As shown in fig. 3, the signal receiver 120B includes a current sensor 6 and an oscilloscope 7. The current sensor 6 is used to detect an induced current flowing in the blood circuit. The oscilloscope 7 is connected to the current sensor 6 and receives a voltage signal corresponding to the induced current detected by the current sensor 6.
As shown in fig. 4, the current sensor 6 includes a ring-shaped sensing unit through which the hemodialysis tube 1 passes, and thus, when blood flows through the hemodialysis tube 1, the current sensor 6 can detect an induced current in the blood circuit.
In addition, although not shown, the puncture needle slipping alarm device 100 further includes an alarm terminal installed in the nurse station and having an alarm display lamp corresponding to the hospital bed number. The alarm terminal is connected with the alarm unit 110 in a communication mode, receives the alarm signal sent by the alarm unit 110, and when the alarm signal is received, the alarm display lamp flickers, so that a nurse can be timely and effectively prompted that a patient with the hospital bed number may be in a dangerous condition.
Next, the operation flow of the puncture needle slippage warning device 100 according to the embodiment of the present invention will be described.
Fig. 5 is a flowchart illustrating the operation of the puncture needle slippage warning device 100 according to the embodiment of the present invention.
First, in step S101, puncture needles a and b are punctured.
In step S102, it is determined whether or not blood has flowed through the hemodialysis tube 1 to form a blood circuit, and if not, it is checked whether or not there is an error in puncturing, and if so, puncturing is resumed.
In step S103, the signal transmitter 5 applies an excitation electric signal to the coil 4 to generate a changing magnetic field around the coil 4, thereby inducing an induction current in the blood circuit.
In step S104, the current sensor 6 detects an induced current flowing in the blood circuit. The oscilloscope 7 receives a voltage signal corresponding to the induced current.
Next, in step S105, the determination unit 120C determines whether at least one of the puncture needles a and b is disengaged based on whether the oscilloscope 7 receives the voltage signal or the magnitude of the received voltage signal.
Specifically, the determination unit 120C determines that at least one of the puncture needles a and b is disengaged when the oscilloscope 7 does not receive the voltage signal or the received voltage signal does not reach the preset range. When the oscilloscope 7 receives the voltage signal and the voltage signal reaches the preset range, the determination unit 120C determines that the puncture needles a and b are not separated.
When the determination unit 120C determines that the puncture needle is detached, the alarm unit 110 issues an alarm (S106). On the contrary, when it is determined that neither of the puncture needles a and b has been removed, the alarm unit 110 does not issue an alarm, and the flow is terminated.
The puncture needle slippage warning device 100 according to the embodiment of the present invention is described in detail above with reference to the drawings. According to the embodiment, the puncture needle can sense and send out the alarm immediately when slipping, so that the condition of blood loss caused by delay of the alarm and the like is avoided, and the safety incidents caused by slipping of the puncture needle are reduced.
Further, according to the present embodiment, since the alarm device is provided separately from the hemodialysis machine and the alarm device does not come into direct contact with the blood in the hemodialysis line, there is no possibility of cross-infection.
In addition, the existing pressure alarm system has poor flow rate aiming at blood coagulation, the alarm of the falling-off of the puncture needle is easy to be confused, and an independent alarm aiming at the falling-off of the puncture needle does not exist.
In addition, although the above description has been made of the case where the alarm device is provided separately from the hemodialysis machine, the puncture needle slippage alarm device of the present invention may be integrated with the hemodialysis machine and provided integrally with the hemodialysis machine. As shown in fig. 6, the hemodialysis machine 300 is integrated with the puncture needle slip warning device 100 according to the above-described embodiment in addition to the dialysis machine main body 200. In this case, the same effects as those of the above embodiment can be obtained.
The embodiment of the puncture needle slippage warning device of the present invention is described in detail above with reference to the accompanying drawings. However, the specific configuration of the puncture needle slippage warning device of the present invention is not limited to the above-described embodiment, and the present invention includes such a configuration even if there is a design change or the like within a range not departing from the gist of the present invention.
Description of the symbols
1: hemodialysis line, 2: power supply, 3: resistance, 4: coil, 5: signal transmitting section, 6: current sensor, 7: oscilloscope, 100: puncture needle slippage alarm device, 110: alarm unit, 120: monitoring unit, 120A: signal generator, 120B: signal receiver, 120C: determination unit, 200: dialysis machine body, 300: a hemodialysis machine.
Claims (9)
1. The utility model provides an alarm device that pjncture needle slippage for hemodialysis which characterized in that includes: a monitoring unit and an alarm unit, wherein,
the monitoring unit has:
a signal generator having a coil through which a hemodialysis tube passes, the signal generator generating an induced current in a blood circuit circulating in the hemodialysis tube by applying an excitation electric signal to the coil;
a signal receiver that receives a voltage signal corresponding to the induced current; and
a judging part which judges whether the puncture needle connected with the two ends of the hemodialysis pipeline is separated from the human body according to whether the signal receiver receives the voltage signal or the magnitude of the received voltage signal,
the alarm unit is connected with the monitoring unit and gives an alarm in response to the judgment result of the judgment part.
2. The warning device according to claim 1,
when the signal receiver does not receive the voltage signal or the received voltage signal does not reach a preset range, the monitoring unit judges that at least one puncture needle is separated, the alarm unit gives an alarm,
when the signal receiver receives the voltage signal and the voltage signal reaches a preset range, the monitoring unit judges that the puncture needles are not separated, and the alarm unit does not give an alarm.
3. The warning device according to claim 1,
the signal generator further comprises a power supply, a resistor and a signal transmitting part, the power supply, the resistor and the signal transmitting part are connected in series with the coil,
the signal transmitting section outputs an excitation electric signal to the coil.
4. The warning device according to claim 3,
the power supply is a direct current stabilized power supply.
5. The warning device according to claim 3,
the excitation electric signal is a direct current square wave signal.
6. The warning device according to claim 5,
the frequency range of the direct current square wave signal is 50 HZ-100 HZ, the duty ratio is 50%, and the amplitude is 24V.
7. The warning device according to claim 1,
the signal receiver comprises a current sensor and an oscilloscope,
the current sensor has an annular sensing unit that detects the induced current in the blood circuit when the hemodialysis line passes therethrough,
the oscilloscope is connected with the current sensor and receives a voltage signal corresponding to the induced current.
8. The warning device according to claim 1,
also comprises an alarm terminal which is arranged in the nurse station and is provided with an alarm display lamp corresponding to the hospital bed number,
the alarm terminal is connected with the alarm unit in a communication mode, receives an alarm signal sent by the alarm unit, and the alarm display lamp flickers when the alarm signal is received.
9. A hemodialysis machine is characterized in that,
an alarm device as claimed in any one of claims 1 to 8 integrated therewith.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110735761.1A CN113332510A (en) | 2021-06-30 | 2021-06-30 | Hemodialysis is with alarm device and hemodialysis machine of pjncture needle slippage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110735761.1A CN113332510A (en) | 2021-06-30 | 2021-06-30 | Hemodialysis is with alarm device and hemodialysis machine of pjncture needle slippage |
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| Publication Number | Publication Date |
|---|---|
| CN113332510A true CN113332510A (en) | 2021-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110735761.1A Pending CN113332510A (en) | 2021-06-30 | 2021-06-30 | Hemodialysis is with alarm device and hemodialysis machine of pjncture needle slippage |
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| CN (1) | CN113332510A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030195453A1 (en) * | 2002-04-10 | 2003-10-16 | James Han | Access disconnection systems and methods |
| CN110300546A (en) * | 2016-11-29 | 2019-10-01 | 铸造创新&研究第一有限责任公司 | System and method for monitoring the wireless resonant circuit and variable inductance Vascular implant and the use implantation material of patient's vascular system and fluid state |
| CN111345789A (en) * | 2020-02-13 | 2020-06-30 | 中国人民解放军海军特色医学中心 | Bleeding alarm device for hemodialysis and real-time bleeding monitoring system |
-
2021
- 2021-06-30 CN CN202110735761.1A patent/CN113332510A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030195453A1 (en) * | 2002-04-10 | 2003-10-16 | James Han | Access disconnection systems and methods |
| CN110300546A (en) * | 2016-11-29 | 2019-10-01 | 铸造创新&研究第一有限责任公司 | System and method for monitoring the wireless resonant circuit and variable inductance Vascular implant and the use implantation material of patient's vascular system and fluid state |
| CN111345789A (en) * | 2020-02-13 | 2020-06-30 | 中国人民解放军海军特色医学中心 | Bleeding alarm device for hemodialysis and real-time bleeding monitoring system |
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