Micro-catheter shaping electromagnetic heater

Abstract

The invention discloses a microcatheter shaping electromagnetic heater which comprises a shell, an electromagnetic heating coil, a timing key, a display screen, a single chip microcomputer, a heating circuit, a nixie tube driving circuit, a nixie tube and a power module. The upper surface of the shell is provided with a display screen and a timing button, the front end of the shell is provided with an electromagnetic heating coil, and the side surface of the shell is provided with a power interface; the single-chip microcomputer, the heating circuit, the nixie tube driving circuit, the nixie tube and the power module are all arranged in the shell, the single-chip microcomputer is connected with the heating circuit, the nixie tube driving circuit and the power module, the power module is connected with the heating circuit and the nixie tube driving circuit, and the nixie tube driving circuit is connected with the nixie tube. The heating element is the cylindrical electromagnetic heating coil which is hollow on the whole, the electromagnetic heating coil heats the micro-catheter located in the electromagnetic heating coil from the periphery of the micro-catheter at the same time, heating dead angles do not exist, the whole micro-catheter is heated at the same time, heating is uniform, and the shaping effect of the micro-catheter is good.

Description

Technical Field

[0001] The invention relates to a heater, in particular to a micro-catheter shaping electromagnetic heater. Background Art

[0002] Intracranial aneurysm is one of the main causes of death and disability in cerebrovascular diseases. According to relevant statistics, 80% of subarachnoid hemorrhage is caused by ruptured cerebral aneurysm. Because intracranial aneurysms are very likely to rupture under the influence of emotional excitement or external impact, causing fatal intracranial hemorrhage, they are called "time bombs" in the brain. In my country, about 1 / 3 of aneurysm patients died on the way to the hospital, 1 / 3 of patients were not saved after being sent to the hospital, 1 / 3 of patients can be cured, but 30% of them may still lose the ability to take care of themselves.

[0003] At present, the main treatments for intracranial aneurysms include surgical craniotomy clipping and interventional coil embolization. With the development of materials and technology, interventional coil embolization in interventional radiology has become increasingly important in the treatment of aneurysms due to its low trauma and good efficacy. There are two main difficulties in aneurysm embolization. The first is how to accurately reach the aneurysm sac with the microcatheter, and the second is that in order to avoid the microcatheter from falling out during the embolization process, its tip must maintain good stability.

[0004] Therefore, how to design the shape of the microcatheter well and accurately shape the microcatheter during the operation is the key to the success of interventional surgery. The conventional traditional shaping method is to shape the microcatheter, fit a shaping needle to the inner wall of the blood vessel model for artificial pre-bending, then insert the shaping needle core into the head of the microcatheter, shape the microcatheter, make the microcatheter present the corresponding bend, then use a hot air gun to blow and heat the microcatheter for 50 seconds, cool it with saline, and pull out the shaping needle. At this time, the shaping of the microcatheter is completed.

[0005] The traditional micro-duct shaping method is to use a hot air gun to blow and heat, which has the following disadvantages at this stage: 1. When the hot air gun is heated, the heating wind direction is fixed, which leads to a single heating surface for blow molding. The microduct cannot be heated evenly as a whole, and the microduct cannot be deformed evenly, which greatly reduces the shaping accuracy.

[0006] 2. Because the microduct has a single heating surface, a hot air gun is required to rotate and blow-heat the microduct in different directions multiple times. Since the manual rotation heating angle cannot be accurately positioned, and when blowing and heating in other directions, the temperature of the previous microduct heating surface decreases, the shaping ability decreases before the shaping begins, which will increase the difficulty of shaping and is not conducive to completing the shaping in one go.

[0007] 3. Because the existing microcatheter hot air gun blowing and heating shaping technology is cumbersome to operate and the heating is uneven, the microcatheter shaping time during surgery will be greatly increased, resulting in increased operation time and extended surgical risk period, which is not conducive to the development of clinical treatment. Summary of the invention

[0008] In view of the problems existing in the above-mentioned prior art, the present invention provides a microcatheter shaping electromagnetic heater, which has no heating dead angle and does not need to adjust the heating angle. The microcatheter is heated as a whole and evenly, and the shaping time is short and the shaping effect is good.

[0009] To achieve the above object, the present invention provides the following technical solutions: a micro-catheter shaping electromagnetic heater, comprising a housing, an electromagnetic heating coil, a time adjustment button, a display screen, a single-chip microcomputer, a heating circuit, a digital tube driving circuit, a digital tube and a power module; The upper surface of the shell is provided with a display screen and a time adjustment button, the front end of the shell is provided with an electromagnetic heating coil, and the side of the shell is provided with a power interface; the single-chip microcomputer, the heating circuit, the digital tube driving circuit, the digital tube and the power module are all arranged inside the shell; the single-chip microcomputer pin 18 is connected to the 5V power supply of the power module, and the pin 18 is grounded through the capacitor C3, and the single-chip microcomputer pin 20 is grounded; The heating circuit includes five resistors, a transistor Q3, a relay K1, an inductor L2, a capacitor C2, two diodes and two field effect transistors; the inductor L2 is connected in parallel to the capacitor C2; The anode of the diode D1 is connected to the gate of the field effect transistor Q1, the source of the field effect transistor Q1 is grounded, the drain of the field effect transistor Q1 is connected to one end of the capacitor C2, the two ends of the resistor R4 are respectively connected to the gate and source of the field effect transistor Q1, one end of the resistor R3 is connected to the gate of the field effect transistor Q1, and the cathode of the diode D1 is connected to the drain of the field effect transistor Q2; The anode of the diode D2 is connected to the gate of the field effect tube Q2, the source of the field effect tube Q2 is grounded, the drain of the field effect tube Q2 is connected to the other end of the capacitor C2, the two ends of the resistor R5 are respectively connected to the gate and source of the field effect tube Q2, one end of the resistor R2 is connected to the gate of the field effect tube Q2, and the cathode of the diode D2 is connected to the drain of the field effect tube Q1; The tap of the inductor L2, the other end of the resistor R2 and the other end of the resistor R3 are all connected to the 24V output end of the coil switch of the relay K1, the 24V input end of the coil switch of the relay K1 is connected to the 24V power supply of the power module, one end of the internal coil of the relay K1 is grounded and the other end is connected to the collector of the transistor Q3, the emitter of the transistor Q3 is connected to the 5V power supply of the power module, the base of the transistor Q3 is connected to one end of the resistor R7, and the other end of the resistor R7 is connected to the pin P4.4 of the single-chip computer; Pins 2 to 9 of the digital tube drive circuit are connected to digital tube pin 13, pin 9, pin 4, pin 2, pin 1, pin 12, pin 5 and pin 3 respectively, pins 12 to 15 of the digital tube drive circuit are connected to digital tube pin 6, pin 10, pin 11 and pin 14 respectively, digital tube pin 8 is grounded, digital tube pin 7 is connected to microcontroller pin P4.1 after being connected in series with resistor R6, digital tube drive circuit pin 1 is grounded, digital tube drive circuit pin 16 is connected to the 5V power supply of the power module, digital tube drive circuit pin 20 is connected to digital tube pin 13, pin 9, pin 4 and pin 2 through buttons S2, button S3, button S4 and button S5 respectively, digital tube drive circuit pin 17 and pin 18 are connected to microcontroller pin P5.5 and pin P5.4 respectively; the electromagnetic heating coil is connected in parallel to capacitor C2.

[0010] Furthermore, the single chip microcomputer model is STC15F2K60S2.

[0011] Furthermore, the digital tube driving circuit adopts TM1637 chip.

[0012] Furthermore, the electromagnetic heating coil is connected to the housing in a pluggable structure.

[0013] Furthermore, a working indicator light is provided on the upper surface of the shell.

[0014] Furthermore, a rotating support frame is respectively provided at the front of the left and right sides of the shell, the inner end of the rotating support frame is hinged to the shell, and the outer end of the rotating support frame is a branch shape. When the rotating support frame is rotated forward into position, the end line of the left and right rotating support frames coincides with the axis of the electromagnetic heating coil.

[0015] Compared with the prior art, the heating element of the present invention is an electromagnetic heating coil which is hollow and cylindrical as a whole. Before shaping, the microcatheter is placed at the axial position inside the electromagnetic heating coil. The electromagnetic heating coil heats the microcatheter inside it from all sides of the microcatheter at the same time, without any heating dead angle, so that the entire microcatheter is heated at the same time and evenly, and deformation problems caused by uneven heating will not occur. The microcatheter shaping effect is good, the shaping accuracy is high, and the shaping is simple and convenient. Since the entire microcatheter is heated at the same time, there is no need to adjust the shaping angle, thereby shortening the microcatheter shaping time during the operation and reducing the surgical risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a circuit principle block diagram of the present invention; Figure 3 It is the wiring diagram of the single chip microcomputer of the present invention; Figure 4This is the wiring diagram of the digital tube driving circuit of the present invention; Figure 5 This is the wiring diagram of the digital tube circuit of the present invention; Figure 6 This is a circuit diagram of the control part of the heating circuit of the present invention; Figure 7 A circuit diagram of a heating part of a heating circuit of the present invention; In the figure: 1. Shell; 2. Electromagnetic heating coil; 3. Time adjustment button; 4. Working indicator light; 5. Display screen; 6. Power interface; 7. Rotating support frame. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figure 1 and Figure 2 As shown, the present invention provides a technical solution: including a housing 1, an electromagnetic heating coil 2, a time adjustment button 3, a display screen 5, a single-chip microcomputer, a heating circuit, a digital tube driving circuit, a digital tube and a power module.

[0020] A display screen 5 and a time adjustment button 3 are provided on the upper surface of the shell 1. The display screen 5 is used to display the remaining heating time, and the time adjustment button 3 is used to set the heating time. An electromagnetic heating coil 2 is provided at the front end of the shell 1 for heating and shaping the microcatheter. A power interface 6 is provided on the side of the shell 1 for external power supply. The single-chip microcomputer, heating circuit, digital tube driving circuit, digital tube and power module are all arranged inside the shell 1. The digital tube is set below the display screen 5, and the display of the digital tube can be seen through the display screen.

[0021] The power module is a well-known power circuit that can provide 24V and 5V power to power the single-chip microcomputer, the heating circuit and the digital tube driving circuit.

[0022] like Figure 3 As shown, the single-chip microcomputer is the control element, model STC15F2K60S2, the single-chip microcomputer pin 18 is connected to the 5V power supply of the power module, and the pin 18 is grounded through the capacitor C3, the capacitor C3 plays the role of filtering out high-frequency interference signals, and the single-chip microcomputer pin 20 is grounded; like Figure 6 and Figure 7As shown, the heating circuit plays a role in controlling the heating of the electromagnetic heating coil 2. The heating circuit includes five resistors, a transistor Q3, a relay K1, an inductor L2, a capacitor C2, two diodes and two field effect transistors; the inductor L2 is connected in parallel to the capacitor C2; The anode of the diode D1 is connected to the gate of the field effect transistor Q1, the source of the field effect transistor Q1 is grounded, the drain of the field effect transistor Q1 is connected to one end of the capacitor C2, the two ends of the resistor R4 are respectively connected to the gate and source of the field effect transistor Q1, one end of the resistor R3 is connected to the gate of the field effect transistor Q1, and the cathode of the diode D1 is connected to the drain of the field effect transistor Q2; The anode of the diode D2 is connected to the gate of the field effect tube Q2, the source of the field effect tube Q2 is grounded, the drain of the field effect tube Q2 is connected to the other end of the capacitor C2, the two ends of the resistor R5 are respectively connected to the gate and source of the field effect tube Q2, one end of the resistor R2 is connected to the gate of the field effect tube Q2, and the cathode of the diode D2 is connected to the drain of the field effect tube Q1; The tap of the inductor L2, the other end of the resistor R2 and the other end of the resistor R3 are all connected to the 24V output end of the coil switch of the relay K1, the 24V input end of the coil switch of the relay K1 is connected to the 24V power supply of the power module, one end of the internal coil of the relay K1 is grounded and the other end is connected to the collector of the transistor Q3, the emitter of the transistor Q3 is connected to the 5V power supply of the power module, the base of the transistor Q3 is connected to one end of the resistor R7, and the other end of the resistor R7 is connected to the pin P4.4 of the single-chip computer; The single chip microcomputer gives a low level trigger signal to transistor Q3 through pin P4.4, so that transistor Q3 is turned on. At this time, the coil of relay K1 is energized, so that the coil switch is attracted and turned on. The 24V power supply is passed into the two field effect transistors, controlling the field effect transistor Q1 and the field effect transistor Q2 to be turned on in turn to generate an oscillating voltage signal, and generating eddy currents at the electromagnetic heating coil 2 to achieve the purpose of heating.

[0023] like Figure 4 and Figure 5As shown, the digital tube drive circuit adopts TM1637 chip, and the digital tube drive circuit pins 2 to 9 are connected to the digital tube pins 13, 9, 4, 2, 1, 12, 5 and 3 respectively, thereby controlling the digital tube display number, and the digital tube drive circuit pins 12 to 15 are connected to the digital tube pins 6, 10, 11 and 14 respectively, thereby controlling the digital tube display number, the digital tube pin 8 is grounded, the digital tube pin 7 is connected to the single chip microcomputer pin P4.1 after the resistor R6 is connected in series, the digital tube drive circuit pin 1 is grounded, and the digital tube drive circuit pin 16 is connected to the 5V power of the power module. Source, the pin 20 of the digital tube driving circuit is connected to the pin 13, pin 9, pin 4, and pin 2 of the digital tube through buttons S2, S3, S4, and S5 respectively, and the pin 17 and pin 18 of the digital tube driving circuit are connected to the pin P5.5 and pin P5.4 of the single-chip computer respectively; the digital tube driving circuit continuously scans whether buttons S2, S3, S4, and S5 are pressed. If a button is pressed, the digital tube driving circuit transmits the signal to the single-chip computer through pins 17 and 18, and the single-chip computer can identify which button is pressed. The electromagnetic heating coil 2 is connected in parallel to the capacitor C2, and the electromagnetic heating coil 2 is Figure 7 L1 in.

[0024] When in use, the entire device is powered by an external power supply through the power interface 6, the time adjustment button 3 corresponds to the buttons S2, S3, S4 and S5 in the digital tube drive circuit, and then the time adjustment button 3 is used to set the required heating time. After setting the time, the microcatheter is placed in the electromagnetic heating coil 2. At this time, eddy currents are generated in the electromagnetic heating coil 2 to heat and shape the microcatheter. After the heating time is up, the work stops and the shaped microcatheter can be taken out.

[0025] In order to facilitate observation of the working condition of the device, a working indicator light 4 is provided on the upper surface of the shell 1. The indicator lights include a power indicator light and a heating indicator light. The working condition is judged by the on and off of the corresponding indicator lights. The electromagnetic heating coil 2 is connected to the shell 1 in a pluggable structure. The electromagnetic heating coil 2 of a suitable diameter can be flexibly selected according to the structure of the shaped microcatheter. In order to support the microcatheter, a rotating support frame 7 is respectively provided at the front of the left and right sides of the shell 1. The inner end of the rotating support frame 7 is hinged to the shell 1, and the outer end of the rotating support frame 7 is a tree branch type. The rotating support frame 7 can be rotated with the hinged end as the hinge point, and the rotation angle range is 90 degrees, that is, the angle between the rotating support frame 7 and the upper surface of the shell 1 is 0 degrees to 90 degrees. When the angle is 0 degrees, it is a supporting position, and when the angle is 90 degrees, it is a non-supporting position; when the rotating support frame 7 is rotated forward to the position, that is, in the supporting position, the end connection line of the left and right rotating support frames 7 is connected to the shell 1. The axes of the electromagnetic heating coils 2 coincide with each other, and one end of the microcatheter is passed through the electromagnetic heating coils 2 and then mounted on the branch end of a rotating support frame 7, and the other end of the microcatheter is mounted on the branch end of another rotating support frame 7. At this time, the microcatheter placed inside the electromagnetic heating coils 2 is at the axis position of the electromagnetic heating coils 2, and the electromagnetic heating coils 2 are hollow cylindrical as a whole. The electromagnetic heating coils 2 heat the microcatheter simultaneously from all sides of the microcatheter, and there is no heating dead angle. The microcatheter is heated as a whole and evenly, and there will be no deformation problems caused by uneven heating, and the shaping effect is good.

[0026] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any slight modification, equivalent substitution and improvement made to the above embodiment based on the technical essence of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. A micro-catheter shaping electromagnetic heater, characterized in that: It comprises a housing (1), an electromagnetic heating coil (2), a time adjustment button (3), a display screen (5), a single chip microcomputer, a heating circuit, a digital tube drive circuit, a digital tube and a power module; A display screen (5) and a time adjustment button (3) are provided on the upper surface of the housing (1); an electromagnetic heating coil (2) is provided at the front end of the housing (1); and a power supply interface (6) is provided on the side of the housing (1); the single-chip microcomputer, the heating circuit, the digital tube drive circuit, the digital tube and the power supply module are all arranged inside the housing (1); The MCU pin 18 is connected to the 5V power supply of the power module. At the same time, the pin 18 is grounded through the capacitor C3, and the MCU pin 20 is grounded; The heating circuit includes five resistors, a transistor Q3, a relay K1, an inductor L2, a capacitor C2, two diodes and two field effect transistors; the inductor L2 is connected in parallel to the capacitor C2; The anode of the diode D1 is connected to the gate of the field effect transistor Q1, the source of the field effect transistor Q1 is grounded, the drain of the field effect transistor Q1 is connected to one end of the capacitor C2, the two ends of the resistor R4 are respectively connected to the gate and source of the field effect transistor Q1, one end of the resistor R3 is connected to the gate of the field effect transistor Q1, and the cathode of the diode D1 is connected to the drain of the field effect transistor Q2; The anode of the diode D2 is connected to the gate of the field effect tube Q2, the source of the field effect tube Q2 is grounded, the drain of the field effect tube Q2 is connected to the other end of the capacitor C2, the two ends of the resistor R5 are respectively connected to the gate and source of the field effect tube Q2, one end of the resistor R2 is connected to the gate of the field effect tube Q2, and the cathode of the diode D2 is connected to the drain of the field effect tube Q1; The tap of the inductor L2, the other end of the resistor R2 and the other end of the resistor R3 are all connected to the 24V output end of the coil switch of the relay K1, the 24V input end of the coil switch of the relay K1 is connected to the 24V power supply of the power module, one end of the internal coil of the relay K1 is grounded and the other end is connected to the collector of the transistor Q3, the emitter of the transistor Q3 is connected to the 5V power supply of the power module, the base of the transistor Q3 is connected to one end of the resistor R7, and the other end of the resistor R7 is connected to the pin P4.4 of the single-chip computer; Pins 2 to 9 of the digital tube drive circuit are connected to pins 13, 9, 4, 2, 1, 12, 5 and 3 of the digital tube respectively; pins 12 to 15 of the digital tube drive circuit are connected to pins 6, 10, 11 and 14 of the digital tube respectively; pin 8 of the digital tube is grounded; pin 7 of the digital tube is connected to pin P4.1 of the single-chip computer after being connected in series with resistor R6; pin 1 of the digital tube drive circuit is grounded; pin 16 of the digital tube drive circuit is connected to the 5V power supply of the power module; pin 20 of the digital tube drive circuit is connected to pin 13, pin 9, pin 4 and pin 2 of the digital tube respectively through buttons S2, S3, S4 and S5; pins 17 and 18 of the digital tube drive circuit are connected to pin P5.5 and pin P5.4 of the single-chip computer respectively; The electromagnetic heating coil (2) is connected in parallel to the capacitor C2.

2. The micro-catheter shaping electromagnetic heater according to claim 1, characterized in that: The single chip microcomputer model is STC15F2K60S2.

3. The micro-catheter shaping electromagnetic heater according to claim 1, characterized in that: The digital tube driving circuit adopts TM1637 chip.

4. The micro-catheter shaping electromagnetic heater according to claim 1, characterized in that: The electromagnetic heating coil (2) is connected to the housing (1) in a pluggable structure.

5. The micro-catheter shaping electromagnetic heater according to claim 1, characterized in that: An operating indicator light (4) is provided on the upper surface of the housing (1).

6. The micro-catheter shaping electromagnetic heater according to claim 1, characterized in that: A rotating support frame (7) is provided at the front of the left and right sides of the shell (1), respectively. The inner end of the rotating support frame (7) is hinged to the shell (1), and the outer end of the rotating support frame (7) is in a tree branch shape. When the rotating support frame (7) is rotated forward to the right position, the connecting line of the ends of the left and right rotating support frames (7) coincides with the axis of the electromagnetic heating coil (2).

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