CN210904427U - Low-intermediate frequency feedback type injector - Google Patents
Low-intermediate frequency feedback type injector Download PDFInfo
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- CN210904427U CN210904427U CN201921461686.9U CN201921461686U CN210904427U CN 210904427 U CN210904427 U CN 210904427U CN 201921461686 U CN201921461686 U CN 201921461686U CN 210904427 U CN210904427 U CN 210904427U
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Abstract
The utility model provides a low intermediate frequency feedback formula syringe, including syringe needle and needle file, be equipped with the first electrode and the second electrode that are used for detecting human tissue impedance at the syringe needle, first electrode and second electrode are connected with the master control set electricity, and master control set is connected with demonstration or reminding device electricity. Through adopting above structure, the impedance of tissues and organs such as skin, muscle, hydrops and blood can be obtained in accurate measurement, provides the basis for intelligent injection and extraction setting. In the injection process, the injuries such as dislocation, embolism and the like are avoided, and the medicine is accurately administered; or accurately monitoring in the process of fat extraction, so as to avoid damage caused by wrong extraction; or when tumor effusion and cerebrospinal fluid are extracted, medical risks are reduced through accurate scanning prediction and accurate positioning, and the treatment efficiency of doctors is greatly improved.
Description
Technical Field
The utility model relates to the field of medical equipment, especially a low intermediate frequency feedback formula syringe.
Background
The existing syringe is used by manually judging the injection and suction positions, which depends on long-term training of medical staff, and even skilled medical staff can hardly guarantee that the needle can be positioned at a preset position every time.Firstly, the methodDuring operations involving suction, such as arterial blood, tumor hydrops, cerebrospinal fluid, adipose tissue, etc., some of them require the assistance of other auxiliary devices, such as a bedside CT machine, etc., to complete the work. Secondly, when many doctors inject fillers into a human body every year, peripheral tissues are rapidly destroyed after embolism and the like due to the fact that the fillers are injected into blood vessels, serious medical accidents are caused and cannot be scientifically avoided, sometimes, targeted drug delivery cannot be accurately achieved, the treatment effect is broken, the feedback type injector technology can make up for the defects, intelligent eyes are provided for global doctor injection and extraction, and accurate tools are provided for focus treatment of patients. Chinese patent document CN205163829U describes a full-automatic injection device for automatically scanning blood vessels, which scans three-dimensional images of blood vessels in human body parts by using a blood vessel scanner, but the structure and specific working flow of the blood vessel scanner are not described in detail in the document. Chinese patent document CN101564294A describes an electrical impedance tomography method with structural information fused, which provides a technical scheme for obtaining human tissue imaging by detecting electrical impedance of internal tissues of a living body based on electrodes, but the structure and application of the scheme are complex, and the clinical use value is limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a low intermediate frequency feedback formula syringe and method are provided, can swiftly detect location skin, muscle, body fluid and blood impedance accurately to can carry out intelligent injection or suction according to the change of impedance.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a low intermediate frequency feedback formula syringe, includes syringe needle and needle file, is equipped with first electrode and second electrode that is used for detecting human tissue impedance at the syringe needle, and first electrode and second electrode are connected with main control unit electricity, and main control unit is connected with demonstration or reminding device electricity.
In a preferred scheme, the needle head is made of an insulating material or a metal material, and an inner insulating layer is coated on the outer layer of the needle head;
the first electrode and the second electrode are arranged along the length direction of the needle head;
the outer layers of the first electrode and the second electrode are coated with outer insulating layers, and one ends of the first electrode and the second electrode are exposed outside only at positions close to the needle point.
In the preferred scheme, the other ends of the first electrode and the second electrode extend to the outer wall of the needle base, the main control device is sleeved with the needle base, a first lead-in electrode and a second lead-in electrode are arranged on the inner wall of the main control device, and the first lead-in electrode and the second lead-in electrode are respectively and electrically connected with the first electrode and the second electrode.
In a preferred scheme, in the master control device, a master control system is electrically connected with a reference signal source, the reference signal source is electrically connected with a band-pass filter, the band-pass filter is electrically connected with a micro-signal amplifying circuit, and the micro-signal amplifying circuit is electrically connected with a first electrode and a second electrode;
the current detection circuit is electrically connected with the second electrode.
In a preferred scheme, the micro-signal amplifying circuit is an instrument amplifier circuit;
the reference signal passes through the output end of the band-pass filter, is directly electrically connected with one input of the micro-signal amplifying circuit and the first electrode after signal control amplification and modulation;
and the other input of the micro signal amplifying circuit is electrically connected with the second electrode and the current detection circuit.
In a preferred scheme, the structure of the main control device is as follows: the main control system is electrically connected with a reference signal source, the reference signal source is electrically connected with a band-pass filter, and after passing through the band-pass filter, a reference signal provides detection current for the first electrode and the second electrode through the signal control module;
the first electrode and the second electrode are respectively and electrically connected with the micro-signal amplification circuit and the current detection circuit, the micro-signal amplification circuit and the current detection circuit are respectively and electrically connected with at least two groups of A/D conversion modules, the A/D conversion modules are electrically connected with the digital signal processing module, and the digital signal processing module is electrically connected with the main control system.
In a preferable scheme, a third electrode is further arranged at the position of the needle seat, the third electrode is electrically connected with the main control device through a micro-signal amplification circuit, the third electrode is rotatably connected with the needle seat, and the third electrode and one of the first electrode and the second electrode form a variable-frequency impedance detection circuit.
In a preferable scheme, an array electrode is further arranged at the position of the needle seat, the array electrode is electrically connected with the main control device through a micro-signal amplification circuit, and the array electrode and one of the first electrode and the second electrode form a variable frequency impedance detection circuit.
In a preferred scheme, the array electrodes are multiple, the multiple array electrodes are arranged on a flexible fixing belt, and the flexible fixing belt is provided with viscose or adhesive fasteners with ends connected with each other, so that the array electrodes can be reliably contacted with the skin.
In the preferred scheme, a low-frequency current signal of 0-100 Hz is connected between the first electrode and the second electrode to determine the position of the tip of the needle head;
a medium-low frequency signal of 100Hz to 50k Hz is connected between one of the first electrode and the second electrode and the third electrode or the array electrode and is used for scanning different tissues of the human body;
the switching circuit is used for switching the low-frequency current signal and the medium-low frequency signal;
the display or reminding device comprises a display screen, an LED indicating lamp or a buzzer.
The utility model provides a low intermediate frequency feedback formula syringe through the structure more than adopting, and measurement that can be accurate obtains the impedance of tissues and organs such as skin, muscle, hydrops and blood, sets up for intelligent injection and extraction and provides the foundation. The utility model discloses an in, the mode that adopts the dual detection of direct current and well low frequency trickle, according to the impedance change of tissues such as fat, muscle, body fluid, blood, spinal fluid, the accurate detection sets up in a flexible way, and the syringe needle is accurate very easily and detects the tissue of injection position or extraction, rebuilds the image through specific algorithm reduction simultaneously or gives the suggestion, makes injection or extraction process more accurate. For example, in the injection process, the injury such as dislocation, embolism and the like is avoided, and the accurate administration is realized; or accurately monitoring in the process of fat extraction, so as to avoid damage caused by wrong extraction; or when tumor effusion and cerebrospinal fluid are extracted, medical risks are reduced through accurate scanning prediction and accurate positioning, and the treatment efficiency of doctors is greatly improved.
Drawings
The invention will be further explained with reference to the following figures and examples:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the middle needle of the present invention.
Fig. 3 is a schematic cross-sectional view of the needle of the present invention.
Fig. 4 is another preferred structure diagram of the present invention.
Fig. 5 is a schematic view of another preferred mechanism of the present invention.
Fig. 6 is a schematic view of the structure of the connection between the master control device and the needle base.
Fig. 7 is a schematic view of the present invention in use.
Fig. 8 is a frame diagram of the detection system of the present invention.
Fig. 9 is a schematic diagram of a micro signal amplifying circuit according to the present invention.
Fig. 10 is a schematic diagram of the human body impedance detection circuit of the present invention.
In the figure: the device comprises a needle base 1, a main control device 2, a needle 3, an inner insulating layer 31, a needle cylinder 4, a first electrode 5, a second electrode 6, a third electrode 7, an array electrode 8, a flexible fixing band 9, skin 10, an arterial blood vessel 11, an outer insulating layer 12, a first leading-in electrode 13, a second leading-in electrode 14, a tested tissue equivalent circuit 15 and a current detection circuit OP 3.
Detailed Description
Example 1:
as shown in fig. 1 to 7, a low and medium frequency feedback injector comprises a needle 3 and a needle base 1, wherein the needle 3 is provided with a first electrode 5 and a second electrode 6 for detecting impedance of human tissue, the first electrode 5 and the second electrode 6 are electrically connected with a main control device 2, and the main control device 2 is electrically connected with a display or reminding device. With the structure, the main control device 2 accesses electric signals to the first electrode 5 and the second electrode 6, so that the specific position of the needle point in the human tissue is judged according to the impedance.
The direct current resistivity (Ω. m) of human tissue was determined as follows:
cerebrospinal fluid 0.555, serum 0.714, blood 1.85, nerve 25.0, liver 80.0, muscle 90.0, brain 107, fat 10.8 × 102Moistening skin 38.0 × 102Dry skin 40.0 × 103Membraneless bone 20 × 105。
In this example, the position of the human body where the needle point is located can be accurately judged by connecting direct current. The scheme has higher application value in the process of blood or body fluid suction operation. Such as collection of arterial blood, extraction of lymph fluid, cerebrospinal fluid and neoplastic effusion.
In a preferred embodiment as shown in fig. 2, 3 and 6, the needle 3 is made of an insulating material, such as an insulating material made of alumina ceramic, and then a biocompatible coating is coated on the surface of the alumina ceramic. Or, the flexible glass material is adopted, and then the surface of the flexible glass is coated with a polymer film with biocompatibility. Insulating layers such as silk fibroin films, polyvinylpyrrolidone, quaternary ammonium salts, teflon, and heparin complexes, and other coatings produced by Physical Vapor Deposition (PVD), Chemical Vapor Deposition (CVD).
Or the needle head 3 is made of metal material, an inner insulating layer 31 is coated on the outer layer of the needle head 3, and the inner insulating layer 31 is an insulating layer with biocompatibility;
the first electrode 5 and the second electrode 6 are arranged along the length direction of the needle 3;
in a preferred scheme, as shown in fig. 6, the outer layers of the first electrode 5 and the second electrode 6 are coated with an outer insulating layer 12, and one end of the first electrode 5 and one end of the second electrode 6 are exposed only at the position close to the needle tip. With the structure, only the position of the needle tip can conduct current to the tissue contacted by the needle tip, and other positions are insulated, so that the detection result of the position of the needle tip cannot be interfered, and the accuracy of human tissue detection is improved.
In a preferred scheme, as shown in fig. 6, the other ends of the first electrode 5 and the second electrode 6 extend to the outer wall of the needle holder 1, the main control device 2 is sleeved with the needle holder 1, a first lead-in electrode 13 and a second lead-in electrode 14 are arranged on the inner wall of the main control device 2, and the first lead-in electrode 13 and the second lead-in electrode 14 are electrically connected with the first electrode 5 and the second electrode 6, respectively. Further preferably, the first introducing electrode 13 and the second introducing electrode 14 adopt a flexible electrode structure, when the main control device 2 is sleeved with the needle base 1, the first introducing electrode 13 is conducted with the first electrode 5, and the second introducing electrode 14 is conducted with the second electrode 6. By adopting the structure that the main control device 2 is sleeved with the needle base 1, the main control device 2 with higher price can be repeatedly used by being detached, and the cost of adding the first electrode 5 and the second electrode 6 on the needle head 3 through plating can be accepted.
In a preferred scheme, as shown in fig. 9, in the main control device 2, the main control system is electrically connected with a reference signal source, the reference signal source is electrically connected with a band-pass filter, the band-pass filter is electrically connected with a micro-signal amplifying circuit, and the micro-signal amplifying circuit is electrically connected with a first electrode 5 and a second electrode 6;
the current detection circuit OP3 is electrically connected to the second electrode 6. The dashed box in fig. 9 represents the measured tissue equivalent circuit 15.
In a preferred scheme, the micro-signal amplifying circuit is an instrument amplifier circuit;
the reference signal source is directly electrically connected with one input of the micro signal amplifying circuit and the first electrode 5 after signal control amplification and modulation through the output end of the band-pass filter;
the other input of the micro-signal amplifying circuit is electrically connected with the second electrode 6 and the current detection circuit OP 3.
In a preferred embodiment, the main control device 2 has a structure that: the main control system is electrically connected with a reference signal source, the reference signal source is electrically connected with a band-pass filter, and signals passing through the band-pass filter provide detection currents for the first electrode 5 and the second electrode 6 through a signal control module;
the first electrode 5 and the second electrode 6 are respectively and electrically connected with a micro-signal amplifying circuit and a current detection circuit, the micro-signal amplifying circuit and the current detection circuit are respectively and electrically connected with at least two groups of A/D conversion modules, the A/D conversion modules are electrically connected with a digital signal processing module, and the digital signal processing module is electrically connected with a main control system. The digital signal processing module in this example uses embedded processor stm32f103c8, and the a/D conversion module uses AD 7476. The master control system adopts intel or ARM series CPU.
Example 2:
on the basis of the embodiment 1, as shown in fig. 4, preferably, a third electrode 7 is further disposed at the position of the needle holder 1, the third electrode 7 is electrically connected to the main control device 2 through a micro-signal amplifying circuit, the third electrode 7 is rotatably connected to the needle holder 1, and the third electrode 7 and one of the first electrode 5 and the second electrode 6 constitute a variable frequency impedance detection circuit. The third electrode 7 is used as the circle center, the needle head 3 is rotated, the third electrode 7 and the first electrode 5 or the second electrode 6 on the needle head 3 are both reliably contacted with the skin, alternating current is provided between the third electrode 7 and one of the first electrode 5 and the second electrode 6, the positions of muscles and blood vessels are judged according to impedance detection, then direct current is connected between the first electrode 5 and the second electrode 6 in the puncture process, and the tissue position punctured by the needle point is judged, so that the intelligent feedback of the injector is realized.
Another preferred scheme is as shown in fig. 5, an array electrode 8 is further disposed at the position of the needle base 1, the array electrode 8 is electrically connected with the main control device 2 through a micro-signal amplification circuit, and the array electrode 8 and one of the first electrode 5 and the second electrode 6 constitute a variable frequency impedance detection circuit. Alternating current is connected between the array electrode 8 and the first electrode 5 or the second electrode 6, and the position structure of the subcutaneous tissue is judged through impedance detection. Such as the location of fat, body fluids, muscles and blood vessels, preferably, the information of the location structure of the subcutaneous tissue is displayed by a display or reminder device comprising a display screen, an LED indicator light or a buzzer. The prompt is displayed through a display screen, or is prompted through LED lamps with different colors or different brightness, or is prompted through a buzzer. Then, during the puncture process, the position of the needle point in the human tissue is judged by the direct current applied between the first electrode 5 and the second electrode 6. By adopting the structure of the array electrode 8, the scanning detection precision can be further improved. Such as the scanning method described in chinese patent document CN 101564294A.
In a preferred embodiment, as shown in fig. 5, there are a plurality of array electrodes 8, the plurality of array electrodes 8 are disposed on a flexible fixing band 9, and the flexible fixing band 9 is provided with an adhesive or a hook-and-loop fastener with ends connected to each other, so that the array electrodes 8 can be reliably contacted with the skin. According to the scheme, the interference caused by poor contact between the array electrode 8 and the skin is reduced.
In the preferred scheme, a low-frequency current signal of 0-100 Hz is connected between the first electrode 5 and the second electrode 6 to determine the position of the tip of the needle head 3;
a medium-low frequency signal of 100Hz to 50kHz is connected between one of the first electrode 5 and the second electrode 6 and the third electrode 7 or the array electrode 8 for scanning different tissues of the human body; the sensitivity of different tissues of the human body to different frequency currents is utilized to further improve the detection precision. For example, in the measurement of complex impedance frequency characteristics of blood in the papers such as the peak-off, the heart and the like, the position of blood can be scanned on the body surface through the graph of the complex impedance characteristics of blood under the conditions of 0.5mA and frequency of 100 Hz-10 MHz, and then the position of a blood vessel can be judged.
The switching circuit is used for switching the low-frequency current signal and the medium-low frequency signal; the switching circuit preferably employs a soft switching circuit. I.e. a software controlled switching circuit.
Example 3:
in addition to example 2, arterial blood collection was performed as shown in fig. 7. In use, the array electrode 8 is attached to the skin 10 of a patient, and the third electrode 7 and the first electrode 5 are also in reliable contact with the skin. The main control system of the main control device 2 sends out an instruction, the reference signal source sends out alternating current, preferably, the alternating current is sent out from the first electrode 5, and the frequency is 100 Hz-50 kHz. The third electrode 7 or the needle seat 1 is taken as the center of a circle, the direction of the needle head 3 is rotated along the surface of the skin, and the first electrode 5 is ensured to be reliably contacted with the skin in the rotating process. And judging the positions of muscles and blood vessels through images according to the impedance detection. After the target position is determined, in the puncturing process, the circuit is switched, direct current is connected between the first electrode 5 and the second electrode 6, and the position of human tissue reached by the puncture of the needle point is accurately judged through impedance, so that the intelligent feedback of the injector is realized.
The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (10)
1. The utility model provides a low intermediate frequency feedback formula syringe, includes syringe needle (3) and needle file (1), characterized by: the needle head (3) is provided with a first electrode (5) and a second electrode (6) for detecting the impedance of human tissues, the first electrode (5) and the second electrode (6) are electrically connected with the main control device (2), and the main control device (2) is electrically connected with the display or reminding device.
2. A low and intermediate frequency feedback injector as defined in claim 1, wherein: the needle head (3) is made of an insulating material or the needle head (3) is made of a metal material, and an inner insulating layer (31) is coated on the outer layer of the needle head (3);
the first electrode (5) and the second electrode (6) are arranged along the length direction of the needle (3);
the outer layers of the first electrode (5) and the second electrode (6) are coated with an outer insulating layer (12), and one ends of the first electrode (5) and the second electrode (6) are exposed outside only at positions close to the needle point.
3. A low and intermediate frequency feedback injector as defined in claim 2, wherein: the other ends of the first electrode (5) and the second electrode (6) extend to the outer wall of the needle base (1), the main control device (2) is sleeved with the needle base (1), a first lead-in electrode (13) and a second lead-in electrode (14) are arranged on the inner wall of the main control device (2), and the first lead-in electrode (13) and the second lead-in electrode (14) are electrically connected with the first electrode (5) and the second electrode (6) respectively.
4. A low and intermediate frequency feedback injector as defined in claim 1, wherein: in the master control device (2), a master control system is electrically connected with a reference signal source, the reference signal source is electrically connected with a band-pass filter, the band-pass filter is electrically connected with a micro-signal amplifying circuit, and the micro-signal amplifying circuit is electrically connected with a first electrode (5) and a second electrode (6);
the current detection circuit (OP 3) is electrically connected to the second electrode (6).
5. A low and intermediate frequency feedback injector as defined in claim 4, wherein: the micro-signal amplifying circuit is an instrument amplifier circuit;
the reference signal passes through the output end of the band-pass filter, is directly electrically connected with one input of the micro-signal amplifying circuit and the first electrode (5) after signal control amplification and modulation;
the other input of the micro signal amplifying circuit is electrically connected with the second electrode (6) and the current detection circuit (OP 3).
6. A low and intermediate frequency feedback injector as defined in claim 1, wherein: the structure of the main control device (2) is as follows: the main control system is electrically connected with a reference signal source, the reference signal source is electrically connected with a band-pass filter, and after passing through the band-pass filter, a reference signal provides detection current for the first electrode (5) and the second electrode (6) through a signal control module;
the first electrode (5) and the second electrode (6) are respectively and electrically connected with the micro-signal amplification circuit and the current detection circuit, the micro-signal amplification circuit and the current detection circuit are respectively and electrically connected with at least two groups of A/D conversion modules, the A/D conversion modules are electrically connected with the digital signal processing module, and the digital signal processing module is electrically connected with the main control system.
7. A low and intermediate frequency feedback injector as defined in claim 1, wherein: the position of the needle seat (1) is also provided with a third electrode (7), the third electrode (7) is electrically connected with the main control device (2) through a micro-signal amplifying circuit, the third electrode (7) is rotatably connected with the needle seat (1), and the third electrode (7) and one of the first electrode (5) and the second electrode (6) form a variable frequency impedance detection circuit.
8. A low and intermediate frequency feedback injector as defined in claim 1, wherein: an array electrode (8) is further arranged at the position of the needle base (1), the array electrode (8) is electrically connected with the main control device (2) through a micro-signal amplification circuit, and the array electrode (8) and one of the first electrode (5) and the second electrode (6) form a variable-frequency impedance detection circuit.
9. A low and intermediate frequency feedback injector as defined in claim 8, wherein: the array electrodes (8) are multiple, the array electrodes (8) are arranged on the flexible fixing belt (9), and the flexible fixing belt (9) is provided with viscose or adhesive fasteners with mutually connected ends, so that the array electrodes (8) can be reliably contacted with the skin.
10. A low and intermediate frequency feedback injector as claimed in any one of claims 7 to 9, wherein: a low-frequency current signal of 0-100 Hz is connected between the first electrode (5) and the second electrode (6) to determine the position of the tip of the needle head (3);
a medium-low frequency signal of 100Hz to 50k Hz is connected between one of the first electrode (5) and the second electrode (6) and the third electrode (7) or the array electrode (8) and is used for scanning different tissues of the human body;
the switching circuit is used for switching the low-frequency current signal and the medium-low frequency signal;
the display or reminding device comprises a display screen, an LED indicating lamp or a buzzer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021043011A1 (en) * | 2019-09-04 | 2021-03-11 | 武汉中针智能科技有限公司 | Feedback-type intelligent syringe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021043011A1 (en) * | 2019-09-04 | 2021-03-11 | 武汉中针智能科技有限公司 | Feedback-type intelligent syringe |
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Address after: 430000 floors 1-4 and 4, building A1, phase II, R & D base, University of science and Technology Park, No. 1, Fourth Road, Science Park, Donghu New Technology Development Zone, Wuhan, Hubei Province Patentee after: WUHAN ZKKL OPTOELECTRONIC TECHNOLOGY CO.,LTD. Address before: 430000 room 01, floor 4, building 1, Guandong science and Technology Industrial Park, Donghu New Technology Development Zone, Hongshan District, Wuhan City, Hubei Province Patentee before: WUHAN ZKKL OPTOELECTRONIC TECHNOLOGY CO.,LTD. |