CN222072437U

CN222072437U - Laser generating device and laser generating system

Info

Publication number: CN222072437U
Application number: CN202323490623.5U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Hangzhou Juzheng Medical Technology Co ltd
Current assignee: Hangzhou Juzheng Medical Technology Co ltd
Priority date: 2023-12-20
Filing date: 2023-12-20
Publication date: 2024-11-26
Anticipated expiration: 2033-12-20

Abstract

The application relates to a laser generating device and a laser generating system, the laser generating device comprises: the laser generating circuit is used for controlling the laser head to emit laser beams with corresponding intensity according to the PWM signals; the control unit is provided with a first input end and a first output end, and the first output end is used for outputting the PWM signal; a laser switching circuit comprising: the first switching tube is provided with an input electrode for power supply, an output electrode coupled with the first input end and a control electrode coupled to the input electrode, and the control electrode is used for controlling the on-off of the input electrode and the output electrode; the switch is provided with two ends capable of switching on and off states, wherein the first end is coupled with the control electrode, and the second end is coupled with the ground wire. After the change-over switch finishes the switching, the first switch tube changes the conducting state. If the first switching tube is conducted, the control unit correspondingly controls the PWM signal output by the first output end to control the output power of the laser generating circuit, so that the intensity control of the laser beam is realized, and the operation risk is reduced.

Description

Laser generating device and laser generating system

Technical Field

The application relates to the technical field of vascular interventional therapy of medical instruments, in particular to a laser generating device and a laser generating system.

Background

Vascular interventional therapy is used as a clinical treatment means, and consumable materials such as catheters and the like are conveyed into a body by establishing an in-vivo and in-vitro channel. One post-interventional treatment method is to introduce and irradiate a laser beam to a human blood vessel, wherein the laser beam originates from a laser generator arranged outside the body. At present, the laser generators on the market are all used for fixedly emitting a laser beam with power, and when the laser generator is used for vascular interventional therapy, the heat generated by the laser beam can possibly endure the temperature exceeding the vascular temperature of a human body, so that vascular injury or operation failure is caused, and death of a patient is seriously caused.

Disclosure of utility model

In view of the above, it is necessary to provide a laser generating device and a laser generating system.

The laser generator of the present application includes:

The laser generating circuit is used for controlling the laser head to emit laser beams with corresponding intensity according to the PWM signals;

The control unit is provided with a first input end and a first output end, and the first output end is used for outputting the PWM signal;

A laser switching circuit comprising:

The first switching tube is provided with an input electrode for power supply, an output electrode coupled with the first input end and a control electrode coupled with the input electrode, and the control electrode is used for controlling the on-off of the input electrode and the output electrode;

the switch is provided with two ends capable of switching on and off states, wherein the first end is coupled with the control electrode, and the second end is coupled with the ground wire.

The following provides several alternatives, but not as additional limitations to the above-described overall scheme, and only further additions or preferences, each of which may be individually combined for the above-described overall scheme, or may be combined among multiple alternatives, without technical or logical contradictions.

Optionally, the first switching tube is a low-voltage control on-off switching tube, and a first resistor is coupled between the input electrode and the control electrode.

Optionally, a second resistor is coupled between the output electrode and the first input end, and a filter circuit is coupled between the first input end and the ground line.

Optionally, a switching time detection circuit is included, the switching time detection circuit including:

A first zener diode having an anode powered on, the first zener diode cathode coupled to the first end;

The control unit is provided with a second input end, and the anode of the first Zener diode is coupled to the second input end and used for detecting the switching time of the switching switch.

Optionally, a second zener diode is coupled between the control electrode and the ground, an anode of the second zener diode is coupled to the control electrode, and a cathode of the second zener diode is coupled to the ground.

Optionally, the laser generating circuit includes:

The second switching tube is provided with a source electrode for feeding electricity, a drain electrode coupled to the laser head and a grid electrode for controlling on-off of the source electrode and the drain electrode, and the grid electrode is coupled to the first output end and used for receiving the PWM signal and changing the output power of the laser generating device.

The application provides a laser generating system, which comprises a laser generating device and a medical antibacterial catheter, wherein the medical antibacterial catheter comprises:

A catheter body;

The optical fiber is provided with a light source connector, and the light path of the light source connector is in butt joint communication with the laser head and is used for transmitting the laser beam; the other end of the optical fiber is a working end, and the working end extends in the catheter body.

Optionally, the light source connector is provided with a chip for pre-storing the use rules of the medical antibacterial catheter;

The laser generating device comprises a chip identification plate matched with the chip, and the chip identification plate is connected to the control unit.

Optionally, the control unit has a third input terminal, and the laser generating circuit includes a thermocouple for detecting a temperature of a predetermined area, and the third input terminal is connected to the thermocouple.

Optionally, the thermocouples extend in parallel along the interior of the catheter body to the working end.

The laser generating device and the laser generating system have at least the following technical effects:

According to the laser generating device, after the change-over switch is switched, the first switch tube changes the conducting state of the first switch tube. If the first switching tube is conducted, the input electrode for power supply transmits an electric signal to the first input end of the control unit, and the control unit correspondingly controls the PWM signal output by the first output end according to the signal received by the first input end so as to control the output power of the laser generating circuit, thereby realizing the intensity control of the laser beam and adjusting the temperature of the power laser beam. When the laser beam irradiates the inner wall of the blood vessel of the patient, the temperature of the inner wall of the blood vessel can be changed to protect the blood vessel of the patient, the operation risk is reduced, and the success rate of the operation is increased.

The laser generating system can obtain the light beam temperature through thermocouple sampling and transmit the light beam temperature back to the control unit so as to control the equipment to automatically adjust the power of the laser. When the temperature reaches the maximum temperature which can be borne by a human body, the temperature controller recognizes that the temperature reaches the limit value, the control unit reduces the output power of the laser generating circuit through the PWM signal, controls the current to be reduced, controls the power of the laser generator to be reduced, and reduces the temperature of the light beam, thereby protecting the blood vessel of a patient from being burnt and realizing the automatic adjustment of the temperature.

Drawings

FIG. 1 is a schematic block diagram of a laser generating device according to an embodiment of the application;

FIG. 2 is a schematic diagram of a partial circuit of a laser generating device according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a laser generating system according to an embodiment of the present application;

FIG. 4 is a schematic diagram illustrating the operation of a laser generating system according to an embodiment of the present application.

Reference numerals in the drawings are described as follows:

100. A laser switching circuit; 110. a first switching tube; 111. an input electrode; 112. an output electrode; 113. a control electrode; 120. a change-over switch; 121. a first end; 122. a second end; 200. a control unit; 211. a first input; 212. a second input terminal; 213. a third input; 221. a first output terminal; 230. a filter circuit; 240. a thermocouple; 300. a laser generating circuit; 400. a laser head; 500. a switching time detection circuit; 600. medical antibacterial catheters; 610. a catheter body; 620. an optical fiber; 621. a working end; 630. a light source connector.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It will be understood that when an element is referred to as being "coupled" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the present disclosure, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or as implicitly indicating the number, order of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present disclosure, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements expressly listed but may include other elements not expressly listed or inherent to such article or apparatus.

In the present application, the terms "corresponding", "matched", "compatible", such as "B corresponding to a", "a corresponding to B", or "B corresponding to a", mean that B has a correspondence with the shape, position, or function of a, from which B can be determined. Determining B from a does not mean determining B from a alone, but may also be based on a and/or other information.

Referring to fig. 1 and 2, in one embodiment of the present application, a laser generating apparatus is provided, which includes a laser generating circuit 300, a control unit 200, and a laser switching circuit 100. The laser switch circuit 100 is configured to input a signal to the control unit 200 after the switch 120 performs a switching operation, and the control unit 200 controls the laser generating circuit 300 to emit or close the laser beam accordingly.

The laser switching circuit 100 includes a first switching tube 110 and a changeover switch 120. The first switch tube 110 has an input pole 111 for supplying power, an output pole 112 coupled to the first input terminal 211, and a control pole 113 coupled to the input pole 111, wherein the control pole 113 is used for controlling the on-off of the input pole 111 and the output pole 112. The switch 120 has a first end 121 and a second end 122 capable of switching on/off states, wherein the first end 121 is coupled to the control electrode 113, and the second end 122 is coupled to the ground. The control unit 200 has a first input terminal 211 and a first output terminal 221, the first output terminal 221 for outputting a PWM signal.

The laser generating circuit 300 is used for controlling the laser head 400 to emit laser beams with corresponding intensities according to the PWM signal. The laser generating circuit 300 includes a second switching tube having a source for supplying power, a drain coupled to the laser head 400, and a gate for controlling on/off of the source and the drain, the gate being coupled to the first output 221 for receiving the PWM signal and changing the output power of the laser generating device. The basic operation principle of the laser generating circuit 300 is to change the output power by changing the conduction angle of the switching tube through the PWM signal, which can be referred to in the related art.

In this embodiment, after the switch 120 completes the switching, the control electrode 113 of the first switching tube 110 receives the switching signal, and changes its conducting state. If the first switching tube 110 is turned on, the input electrode 111 is electrically connected to transmit an electrical signal to the first input end 211 of the control unit 200, and the control unit 200 correspondingly controls the PWM signal output by the first output end 221 according to the signal received by the first input end 211 to control the output power of the laser generating circuit 300, thereby controlling the intensity of the laser beam and adjusting the temperature of the power laser beam. When the laser beam irradiates the inner wall of the blood vessel of the patient, the temperature of the inner wall of the blood vessel can be changed to protect the blood vessel of the patient, the operation risk is reduced, and the success rate of the operation is increased.

Specifically, the first switching tube 110 is a low-voltage control conductive switching tube, such as a PMOS tube. A first resistor R1 is coupled between the input pole 111 and the control pole 113 of the first switching tube 110. A second resistor R2 is coupled between the output electrode 112 and the first input terminal 211, and a filter circuit 230 is coupled between the first input terminal 211 and the ground.

The laser generating device includes a switching time detecting circuit 500 for detecting the time width of the switching operation, so as to monitor the control logic such as long press and short press, and correspondingly control the working condition of the laser generating circuit 300. The switching time detection circuit 500 includes a first zener diode D1, the anode of the first zener diode D1 is powered (e.g. 3.3V is powered through a resistor R3), and the cathode of the first zener diode D1 is coupled to the first terminal 121. Correspondingly, the control unit 200 has a second input terminal 212, and the anode of the first zener diode D1 is coupled to the second input terminal 212 for detecting the switching time of the switch 120. A second zener diode D2 is coupled between the control electrode 113 and the ground, the anode of the second zener diode D2 is coupled to the control electrode 113, and the cathode of the second zener diode D2 is coupled to the ground.

Referring to fig. 1 to 4, in one embodiment of the present application, a laser generating system is provided, which includes a laser generating device and a medical antimicrobial catheter 600 according to various embodiments of the present application. The medical antibacterial catheter 600 comprises a catheter body 610 and an optical fiber 620, wherein one end of the optical fiber 620 is a driving end and is provided with a light source connector 630, and the light path of the light source connector 630 is in butt joint communication with the laser head 400 and is used for transmitting laser beams; the other end of the optical fiber 620 is a working end 621, and the working end 621 extends within the catheter body 610. The light source connector 630 is mounted with a chip pre-storing the usage rules of the medical antibacterial catheter 600, which may include, for example, default irradiation power, single irradiation time. The laser generating device comprises a chip identification plate which is matched with the chip in an inserting and reading way, the chip identification plate is connected to the control unit 200, and the EEPROM reading circuit can be used for reading the usage rules of the chip identification plate.

The working end 621 of the optical fiber 620 extends into a predetermined region of the catheter body 610, and the driving end of the optical fiber 620 transmits light (in phantom around the working end 621 in the figure) to the working end 621 via the light source connector 630. When the optical fiber 620 transmits sterilizing light having a specific wavelength of sterilizing effect, the sterilizing light is assisted to the wounded part to form sterilizing effect. In operational use, the distal end of the catheter body 610 corresponds to a target sterilization zone of the human body.

In one embodiment, the control unit 200 has a third input 213, and the laser generating circuit 300 includes a thermocouple 240 for detecting a temperature of a predetermined region, the third input 213 being connected to the thermocouple 240. The thermocouples 240 may extend in parallel along the interior of the catheter body 610 to the working end 621 for sensing the temperature of the working end 621. When in use, as shown in fig. 3, the head end of the thermocouple can be placed in the catheter body and inserted into the light-emitting part, and the temperature of the light-emitting part is measured and temperature information is transmitted through the thermocouple.

Referring to fig. 3 and 4, the temperature controller may be provided with a laser switch circuit and a control unit provided by each embodiment, and the laser main board may be provided with a laser generating circuit provided by each embodiment. After the thermocouple receives the temperature signal, the output power of a laser generating circuit in the laser main board is changed through the control unit, so that the output of the laser head is changed. Specifically can link to each other the positive pole and the temperature controller of laser head, the negative pole links to each other with the laser generator mainboard, forms the return circuit, controls the electric current size that the laser head passed through the temperature controller to the size of control laser generator power makes the terminal luminous position temperature of optic fibre sacculus control all the time in the acceptable temperature of human blood vessel, guarantees patient's safety in the operation, reduces the operation risk, prevents that the operation from causing the secondary injury to the patient.

The thermocouple samples to obtain the temperature of the light beam, and the temperature information can be converted into electric information and transmitted back to the temperature controller to control the equipment to automatically adjust the power of the laser. When the temperature reaches the maximum temperature which can be borne by a human body, the temperature controller recognizes that the temperature reaches the limit value, the control unit reduces the output power of the laser generating circuit through the PWM signal, controls the current to be reduced, controls the power of the laser generator to be reduced, and reduces the temperature of the light beam, thereby protecting the blood vessel of a patient from being burnt and realizing the automatic adjustment of the temperature.

In this embodiment, the thermocouple is used to measure the temperature of the end of the catheter, and when the temperature reaches the set maximum temperature, the temperature controller is used to reduce the current of the laser generator, so that the power of the laser generator is reduced, thereby achieving the purpose of reducing the temperature, and the doctor can consider whether to increase or decrease the treatment time according to the temperature displayed on the temperature controller.

The thermocouple is used to detect the temperature of the luminous part of the optical fiber balloon, and meanwhile, the thermocouple is thinner and is easier to place at the luminous part of the optical fiber balloon, so that the production is facilitated and the accuracy is higher. The current magnitude that uses the temperature controller to control the laser head also can be more convenient when the temperature controller breaks down, can directly cut off the power supply to the laser head, prevents that the laser head from sending out the laser that exceeds the settlement power, causes the injury to the patient.

The laser generation system provided by the embodiment feeds back and adjusts output power, adjusts working temperature, reduces operation risk, improves operation safety, reduces doctor workload, and is convenient to use. And the accuracy of temperature measurement is ensured, and the possibility of injury to a patient is reduced.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description. When technical features of different embodiments are embodied in the same drawing, the drawing can be regarded as a combination of the embodiments concerned also being disclosed at the same time.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application.

Claims

1. A laser light generating device, comprising:

A laser switching circuit comprising:

2. The laser generator of claim 1, wherein the first switching tube is a low voltage on-off switching tube, and a first resistor is coupled between the input pole and the control pole.

3. The laser generator of claim 1, wherein a second resistor is coupled between the output electrode and the first input terminal, and a filter circuit is coupled between the first input terminal and the ground.

4. The laser light generating device according to claim 1, comprising a switching time detection circuit, the switching time detection circuit comprising:

5. The laser light generating device of claim 4, wherein a second zener diode is coupled between the control electrode and ground, an anode of the second zener diode is coupled to the control electrode, and a cathode of the second zener diode is coupled to the ground.

6. The laser light generating device according to claim 1, wherein the laser light generating circuit comprises:

7. A laser generating system comprising the laser generating device according to any one of claims 1 to 6, and a medical antibacterial catheter comprising:

A catheter body;

8. The laser generating system according to claim 7, wherein the light source connector is mounted with a chip that prestores usage rules of the medical antibacterial catheter;

9. The laser light generating system of claim 7, wherein the control unit has a third input, the laser light generating circuit comprising a thermocouple for detecting a temperature of the predetermined area, the third input being connected to the thermocouple.

10. The laser light generating system of claim 9, wherein the thermocouples extend in parallel along the interior of the catheter body to the working end.