CN104888293A - Implantable axial-flow type blood pump temperature detection system and method based on fiber bragg gratings - Google Patents
Implantable axial-flow type blood pump temperature detection system and method based on fiber bragg gratings Download PDFInfo
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- CN104888293A CN104888293A CN201510209919.6A CN201510209919A CN104888293A CN 104888293 A CN104888293 A CN 104888293A CN 201510209919 A CN201510209919 A CN 201510209919A CN 104888293 A CN104888293 A CN 104888293A
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- blood pump
- fiber grating
- flow type
- fiber
- grating
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Classifications
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- 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
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
-
- 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
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/20—Type thereof
- A61M60/205—Non-positive displacement blood pumps
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
Abstract
The invention provides an implantable axial-flow type blood pump temperature detection system and method based on fiber bragg gratings. The system comprises a blood pump, the fiber bragg gratings (8), a motor controller (10), a demodulator (14) and a computer (13), wherein the fiber bragg grating (8) is pasted to an axial blood pump flow passage (7); the motor controller (10) and the demodulator (14) are connected with the leading-out ends of the fiber bragg gratings (8); the computer (13) is connected with the demodulator (14) through a data line. The method comprises the steps that the fiber bragg gratings are laid on a brushless motor stator; the fiber bragg gratings are laid in the implantable axial-flow type artificial heart pump; optical fibers are led out of the human body and connected with the demodulator. The implantable axial-flow type blood pump temperature detection system detects the temperature of the implantable axial-flow type blood pump through the fiber bragg gratings, and the compatibility problem caused by introduction of a sensor cannot occur while temperature detection is achieved, so that intelligent detection and control are realized, power consumption of the blood pump is reduced, and the problems existing in implantation of the blood pump are reduced.
Description
Technical field
The present invention relates to temperature detection technology, particularly relate to a kind of implantable axial flow type blood pump system for detecting temperature based on fiber grating and method.
Background technology
In recent years, along with the shortcoming of heart transplant donors and developing rapidly of department of cardiac surgery, patients with heart failure extends non-cutting time gradually, the requirement of patient to quality of life is also more and more higher, therefore sickle pump miscellaneous especially implantable axial flow type blood pump more and more become focus, but blood pump also can bring in the course of the work and makes blood pump and blood heat have corresponding impact and change.
In blood pump duty, the maximum reason that temperature produces is the continuous firing of blood pump motor.
1. the heat that distributes of the iron loss copper loss that blood pump permanent magnetic brushless coil causes can pass to blood inside blood pump runner through blood pump inwall this layer of intermediate medium, causes blood heat to change;
2., when impeller runs up, on wheel shaft, the friction of sliding bearing also can cause flowing through blood pump blood heat change;
3. the material of blood pump runner inner surface and smoothness and blood pump impeller, the material of guide wheel, the variations in temperature that the blood under the same viscosity of smoothness brings the friction under streamed.
What variations in temperature had the greatest impact to Homoiotherm is the erythrocyte of life entity, erythrocyte is one of the most important cell that sustains life, it has multiple important physiological function, except portability oxygen and transporting carbon dioxide, substance transportation, information transmission, cellular immunization also rely on erythrocyte.As can be seen here, erythrocyte plays very important effect in maintaining in body the state that weighs, temperature is as hemoglobin and an erythrocytic important allosteric factor, and its minor variations can cause from the molecular structure of hemoglobin, concentration, function so that the remarkable change of erythrocytic form, structure, function.
As mentioned above, blood pump blood heat detects and seems important all the more.And existing temperature sensor variety classes characteristic is also inconsistent, thermocouple sensor precision is medium, and response speed is slow, though RTD sensor accuracy is high but expensive, numeral and modulating output IC temperature sensor response speed slowly, are disturbed impact large, and these sensors all need energising simultaneously.Therefore, be necessary to find the alternative sensor that can overcome this kind of temperature sensor disadvantage.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of implantable axial flow type blood pump system for detecting temperature based on fiber grating and method, to solve the defect of above-mentioned prior art.
The present invention solves its technical problem and adopts following technical scheme:
Implantable axial flow type blood pump system for detecting temperature based on fiber grating provided by the invention, it comprises: blood pump, be pasted on the fiber grating of blood pump shaft orientation flowing channel, the electric machine controller be connected respectively with fiber grating exit, (FBG) demodulator, and by computer that data wire is connected with (FBG) demodulator.
Described fiber grating has many, and it draws human body together with the cable same material sealing also of the motor of blood pump.
Described fiber grating can have 3, be pasted on the first fiber grating affixed points of shaft orientation flowing channel outer surface, the second fiber grating affixed points and the 3rd fiber grating affixed points place respectively, they are respectively used to front jocket wheel to blood pump, impeller and rear guide wheel place and detect.
Implantable axial flow type blood pump temperature checking method based on fiber grating provided by the invention, it utilizes the above-mentioned implantable axial flow type blood pump system for detecting temperature based on fiber grating to realize, and its step comprises:
Step 1: lay fiber grating on brushless motor stator
Its method is: by the stator coil of brushless electric machine around on cylinder shape stator, then fiber grating is carried out cabling and extraction along the fluting on stator;
Step 2: the laying of implantable axial flow type artificial heart pump fiber grating
The method of described laying is: embedded by Bragg grating in an optical fiber, make full use of the small and exquisite and accurate of fiber grating, multiple grating that an optical fiber is connected makes optical fibre optical grating sensing array, be arranged in the outer surface of front jocket wheel, the impeller shaft orientation flowing channel corresponding with rear guide wheel, be in line distribution, avoid fiber kinks, damage optical fiber;
Step 3: human body access (FBG) demodulator drawn by optical fiber
The optical fiber of the outer surface being laid on blood pump shaft orientation flowing channel is drawn human body together with the cable of permanent magnetic brushless, wherein the exit of cable accesses power supply and electric machine controller, the exit access (FBG) demodulator of optical fiber, by (FBG) demodulator, the wavelength obtained is converted to the corresponding signal of telecommunication to the optical signal of the corresponding relation of temperature, and adopt Real time vision blood pump internal temperature situation of change.
In above-mentioned steps 1, get through hole, for the extraction of optical fiber at the 1mm place being close to the outer surface of blood pump shaft orientation flowing channel apart from stator.
Described through-hole aperture is 1mm.
The present invention compared with prior art has following main advantage:
Adopt fiber-optic grating sensor, its transducing head structure is simple, and volume is little, and with the combination of optical fiber, low-loss, spectral characteristic is good, and reliability is high, has anticorrosive simultaneously, the feature of electromagnetism interference.Fiber-optic grating sensor optical fiber can write multiple optical grating constitution sensor array in addition, utilizes the feature of fiber grating " a line multiple spot, distribution measuring ", detects temperature in implantable axial flow type artificial heart pump pump in real time.
Adopt the silica fibre under room temperature, the temperature control of optical fiber Bragg raster is 7.2 × 10
-6/ DEG C.For 1.3nm series grating, it is 1300 × 7.2 × 10 that unit temperature changes the grating wavelength drift caused
-6=0.0094nm/ DEG C, i.e. 0.0094nm/ DEG C.Highly sensitive, little to the metrical error of temperature.
The present invention utilizes fiber grating to detect implantable axial flow type artificial heart pump temperature, can not introduce because of sensor again while realizing temperature detection and bring consistency problem, to reach Intelligent Measurement and control, optical fiber and the unified cable packing wire encapsulated with adopting the material compatible with human body to make of brushless electric machine optical cable draw human vitronectin.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the implantable axial flow type blood pump system for detecting temperature based on fiber grating.
Fig. 2 is that fiber grating stickup distribution draws human body schematic diagram with optical fiber together with brushless electric machine electric wire.
In figure: 1. blood pump entrance; 2. front jocket wheel; 3. impeller; 4. permanent magnetic brushless; 5. guide wheel after; 6. blood pump outlet; 7. shaft orientation flowing channel; 8. fiber grating; 9. the first fiber grating affixed points; 10 electric machine controllers; 11. second fiber grating affixed points; 12. the 3rd fiber grating affixed points; 13. computers; 14. (FBG) demodulators; 15. brushless electric machine cables.
Specific embodiments
The invention provides a kind of implantable axial flow type blood pump system for detecting temperature based on fiber grating and method, this system adopts fiber-optic grating sensor to detect the temperature of implantable axial flow type artificial heart pump runner outer surface, realize the temperature detection of blood pump blood and the detection of blood pump working condition and feed back to user interface, compared with detecting with existing blood pump, fiber grating is utilized to be pasted onto blood pump runner outer surface, fiber-optical grating temperature sensor is laid to blood pump front jocket wheel, rear guide wheel and impeller, by (FBG) demodulator, finally carry out data conversion and be presented at user interface.Finding that this blood pump in present stage detects by inspection information is the application direction that a new research direction and fiber grating are new.
Below in conjunction with embodiment and accompanying drawing, the invention will be further described, but do not limit the present invention.
Embodiment 1. is based on the implantable axial flow type blood pump system for detecting temperature of fiber grating
The implantable axial flow type blood pump system for detecting temperature based on fiber grating that the present embodiment provides, as depicted in figs. 1 and 2, comprise: blood pump, be pasted on the fiber grating 8 of blood pump shaft orientation flowing channel 7, the electric machine controller 10 be connected respectively with fiber grating 8 exit, (FBG) demodulator 14, and by computer 13 that data wire is connected with (FBG) demodulator 14.
Described blood pump is axial-flow type artificial heart pump, studies in China is mainly at nearly 20 years, larger with external gap, for prior art, its housing of the shaft orientation flowing channel 7 with import and export being provided with inner chamber and separating with this inner chamber, be contained in the front jocket wheel 2 be arranged in order from left to right, impeller 3, the rear guide wheel 5 in shaft orientation flowing channel 7, dress permanent magnetic brushless 4 in the lumen.
Described fiber grating 8, has many, and it is by drawing human body together with the sealing also of blood pump motor cable same material.The present embodiment provides 3 fiber gratings being pasted on shaft orientation flowing channel 7 outer surface, the fiber grating being positioned at the first fiber grating affixed points 9, second fiber grating affixed points 11 and the 3rd fiber grating affixed points 12 respectively, they are respectively used to front jocket wheel 2 to blood pump, impeller 3 and rear guide wheel 5 place and detect, and are not limited to this stickup.
Described electric machine controller 10 adopts common brushless motor controller; be made up of electronic commutator, single-chip microcomputer governor circuit, speed limit circuit, hall signal testing circuit, undervoltage detection circuit and protection circuit, supply brushless motor controller by external power source and steady Control for Speed Limitation is carried out to the running of brushless electric machine.
Described (FBG) demodulator 14 adopts SM130 (FBG) demodulator, and SM130 is the measuring system of high-power, high-speed a, multisensor, is mainly mechanics Application in Sensing and improves.Employ MicronOptics patented technology tuning wavelength scan laser, SM130 has high power short scan (reaching as high as 2KHz), it is a perfect system, has scan-type light source, can measure by 4 detectors the optical signal that every root fiber reflection returns simultaneously.
Described computer 13, after its corresponding relation (FBG) demodulator 14 being obtained wavelength and temperature utilizes temperature compensation algorithm process, display blood pump internal temperature situation of change in real time.
The above-mentioned implantable axial flow type blood pump system for detecting temperature based on fiber grating provided by the invention, its work process is: utilize the sensing principle of fiber grating to carry out the job analysis of this invention.Human body, in motion or when feeling not quite the thing, utilizes fiber grating detection system to carry out 2 front jocket wheels, 3 impellers, and after 5, the blood pump temperature detection of guide wheel infers the working condition of blood heat and blood pump.In optical fiber grating sensing, because sensing amount is to Wavelength-encoding, adopt the LED light source of wider broadband and stronger output and stability to meet the needs that in distributed sensing system, multiple spot many reference amounts are measured, without the need to power supply, the broadband light of Fiber Bragg Grating FBG is incided after bonder, utilize the sensitivity characteristic of the effective refractive index of fiber grating and screen periods parameter to external world, be the movement of its bragg wavelength by the change transitions of blood pump temperature, thus through 14 demodulation instruments, the measurement realized blood pump temperature is moved by the centre wavelength detecting optical grating reflection, carry out data-optimized process by 13 data collecting systems simultaneously thus feed back to display interface.
Embodiment 2. is based on the implantable axial flow type blood pump temperature checking method of fiber grating
The method is that the implantable axial flow type artificial heart pump system for detecting temperature based on fiber grating utilizing embodiment 1 to provide realizes, and its step comprises:
Step 1: brushless motor stator is carried out fluting and be convenient to lay fiber grating
The stator coil of brushless electric machine is around on cylinder shape stator, and the cabling of a fiber grating needs through stator, and needing to carry out fluting to stator could draw optical fiber.Get through hole at the 1mm place being close to heart pump runner outer surface apart from stator, aperture is 1mm.
Step 2: the laying of implantable axial flow type artificial heart pump fiber grating
The laying characteristic of described implantable axial flow type artificial heart pump fiber grating is the distribution measuring of a line multiple spot, and namely fiber grating is in the laying situation of heart pump outer surface.
The laying of implantable axial flow type artificial heart pump fiber grating, its method is: embedded by Bragg grating in an optical fiber, make full use of the small and exquisite and accurate of fiber grating, an optical fiber can be connected multiple grating, as shown in Figure 2, to be connected on the optical fibre optical grating sensing array made in an optical fiber, be arranged in the blood pump runner outer surface that front jocket wheel 2, impeller 3 and rear guide wheel 8 are corresponding, be in line distribution, can avoid fiber kinks, damage optical fiber.
Step 3: human body access (FBG) demodulator drawn by optical fiber
By optical fiber drawing outside human body together with permanent magnetic brushless 4 cable in the blood pump pump housing, without the need to extra process and increase wound area, cable access power supply and electric machine controller, then by intelligent acess (FBG) demodulator 14, by (FBG) demodulator 14, the wavelength obtained is converted to the corresponding signal of telecommunication to the optical signal of the corresponding relation of temperature, and adopt computer 13 display blood pump internal temperature situation of change in real time.
Claims (6)
1. based on the implantable axial flow type blood pump system for detecting temperature of fiber grating, it is characterized in that comprising: blood pump, be pasted on the fiber grating (8) of blood pump shaft orientation flowing channel (7), the electric machine controller (10) be connected respectively with fiber grating (8) exit, (FBG) demodulator (14), and by computer (13) that data wire is connected with (FBG) demodulator (14).
2. implantable axial flow type blood pump system for detecting temperature according to claim 1, is characterized in that described fiber grating (8) has many, and it draws human body together with the cable same material sealing also of the motor of blood pump.
3. implantable axial flow type blood pump system for detecting temperature according to claim 2, it is characterized in that described fiber grating (8) has 3, be pasted on the first fiber grating affixed points (9) of shaft orientation flowing channel (7) outer surface, the second fiber grating affixed points (11) and the 3rd fiber grating affixed points (12) place respectively, they are respectively used to front jocket wheel (2) to blood pump, impeller (3) and rear guide wheel (5) place and detect.
4., based on the implantable axial flow type blood pump temperature checking method of fiber grating, it is characterized in that utilizing arbitrary described implantable axial flow type blood pump system for detecting temperature in claim 1 to 3 to realize, its step comprises:
Step 1: lay fiber grating on brushless motor stator
Its method is: by the stator coil of brushless electric machine around on cylinder shape stator, then fiber grating is carried out cabling and extraction along the fluting on stator;
Step 2: the laying of implantable axial flow type artificial heart pump fiber grating
The method of described laying is: embedded by Bragg grating in an optical fiber, make full use of the small and exquisite and accurate of fiber grating, multiple grating that an optical fiber is connected makes optical fibre optical grating sensing array, be arranged in the outer surface of the corresponding shaft orientation flowing channel (7) of front jocket wheel (2), impeller (3) and rear guide wheel (8), be in line distribution, avoid fiber kinks, damage optical fiber;
Step 3: human body access (FBG) demodulator drawn by optical fiber
The optical fiber of the outer surface being laid on blood pump shaft orientation flowing channel (7) is drawn human body together with the cable of permanent magnetic brushless (4), wherein the exit of cable accesses power supply and electric machine controller, exit access (FBG) demodulator (14) of optical fiber, by (FBG) demodulator (14), the wavelength obtained is converted to the corresponding signal of telecommunication to the optical signal of the corresponding relation of temperature, and adopt computer (13) display blood pump internal temperature situation of change in real time.
5. the implantable axial flow type blood pump temperature checking method based on fiber grating according to claim 4, is characterized in that in step 1, gets through hole, for the extraction of optical fiber at the 1mm place being close to the outer surface of blood pump shaft orientation flowing channel (7) apart from stator.
6. the implantable axial flow type blood pump temperature checking method based on fiber grating according to claim 5, is characterized in that described through-hole aperture is 1mm.
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| CN201510209919.6A CN104888293B (en) | 2015-04-28 | 2015-04-28 | Implantable axial-flow type blood pump temperature detection system and method based on fiber bragg gratings |
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Cited By (9)
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| CN109789253A (en) * | 2016-09-23 | 2019-05-21 | 心脏器械股份有限公司 | Sensor is located at the blood pump on surface of shell |
| CN110841123A (en) * | 2019-12-23 | 2020-02-28 | 张瑞娟 | Blood circulation device for cardiovascular treatment |
| CN111295210A (en) * | 2017-11-06 | 2020-06-16 | 心脏器械股份有限公司 | Ventricular Assist Device (VAD) with fluid entry port in housing |
| US11368081B2 (en) | 2018-01-24 | 2022-06-21 | Kardion Gmbh | Magnetic coupling element with a magnetic bearing function |
| US11699551B2 (en) | 2020-11-05 | 2023-07-11 | Kardion Gmbh | Device for inductive energy transmission in a human body and use of the device |
| US11752354B2 (en) | 2018-05-02 | 2023-09-12 | Kardion Gmbh | Transmitter unit comprising a transmission coil and a temperature sensor |
| US11754075B2 (en) | 2018-07-10 | 2023-09-12 | Kardion Gmbh | Impeller for an implantable, vascular support system |
| US11881721B2 (en) | 2018-05-02 | 2024-01-23 | Kardion Gmbh | Wireless energy transfer system with fault detection |
| US11944805B2 (en) | 2020-01-31 | 2024-04-02 | Kardion Gmbh | Pump for delivering a fluid and method of manufacturing a pump |
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| US11881721B2 (en) | 2018-05-02 | 2024-01-23 | Kardion Gmbh | Wireless energy transfer system with fault detection |
| US11752354B2 (en) | 2018-05-02 | 2023-09-12 | Kardion Gmbh | Transmitter unit comprising a transmission coil and a temperature sensor |
| US11754075B2 (en) | 2018-07-10 | 2023-09-12 | Kardion Gmbh | Impeller for an implantable, vascular support system |
| CN110841123A (en) * | 2019-12-23 | 2020-02-28 | 张瑞娟 | Blood circulation device for cardiovascular treatment |
| US11944805B2 (en) | 2020-01-31 | 2024-04-02 | Kardion Gmbh | Pump for delivering a fluid and method of manufacturing a pump |
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