CN206026875U - Neural location electro photoluminescence pen of percutaneous - Google Patents

Abstract

The utility model discloses a neural location electro photoluminescence pen of percutaneous, including an electro photoluminescence casing with set up control circuit unit, the stimulating electrode in the casing, the control circuit unit includes microcontroller, output circuit, power supply circuit, indicating circuit and motion detection circuitry, microcontroller is connected with output circuit, indicating circuit electricity, output circuit and stimulating electrode are connected, stimulating electrode with move that detection circuitry is electric to be connected, the detection circuitry output is connected with microcontroller is electric, power supply circuit with microcontroller, output circuit is electric is connected. The utility model belongs to do not have the location finding technique of wound, avoid causing the unnecessary wound to the tissue, and according to corresponding muscle group's activity situation, automatic adjustment output current to the realization is to objective evaluation of nerve location, utilize pulsewidth modulation (PWM) technique to stabilize output current, realize constant current type square wave pulse output, eliminate skin impedance change's influence, and structural design is reasonable, and the cost is lower.

Description

A kind of nerve positions electro photoluminescence pen

Technical field

The utility model is related to technical field of medical instruments, more particularly to a kind of nerve positioning electro photoluminescence pen.

Background technology

Anesthesia original meaning refers to the forfeiture of sensation or consciousness, then refer to thereafter can make patient undergo surgery or during invasive operation not Feel the state of pain and discomfort.Nerve block is also known as conduction anesthesia, is that local anaesthetics is expelled to by nerve cord, temporarily blocks Nerve conduction, reaches the painless method of operation.Nerve block anesthesia dosage is few, and anesthesia scope is wide, long action time, suffers from Person can keep exchanging with surgical doctor in art in waking state, and anaesthetic effect is also preferable.

Nerve block technique expense is low, and postoperative analgesia is good, for the operation of some four limbs or body surface is particularly fitted Preferably.But traditional nerve block carries out nerve positioning retardance needs certain clinical experience, even if operator is experienced, by In objective index is lacked, being accurately positioned and definite effect for retardance is also difficult to ensure that sometimes.Nerve stimulator location technology makes Obtaining nerve block has objective indicator, improves accuracy and the blockage effect of retardance positioning.

Nerve stimulator reaches nerve positioning purpose by electro photoluminescence, then by realizing accurate nerve block effect with anaesthetic Really.At present, it is 1 or 2Hz, the electric current arteries and veins that Strength Changes scope is 0～5.0mA using frequency that electrical stimulation localization method is Punching, by perineural muscular irritation nerve, by reduction, variable-current intensity, would know that puncture needle positioning scenarios.Example Such as, when motion occurs in the corresponding muscle group of innervation under initial current intensity, reduce electric current as still there is muscle group activity, illustrate positioning compared with It is good；Conversely, explanation puncture needle from nerve still have with a certain distance from.It is generally acknowledged that when electric current is reduced to 0.5mA as still there is corresponding flesh Group's activity, you can administration.But control of the electrical stimulation localization method of prior art to current impulse is remained manually Setup parameter scope, degree of regulation are poor, and final using effect is poor, and the patent of such as Application No. 201110084267.X is exactly Adjust setup module manually to set the parameters of boost pulse electric current by running parameter, it is more extensive, it is not suitable with to essence Degree requires the requirement of higher electrical stimulation localization method.

The content of the invention

In view of the drawbacks described above of prior art, technical problem to be solved in the utility model is to provide a kind of percutaneous god Located electro photoluminescence pen, to solve the deficiencies in the prior art.

For achieving the above object, the utility model provides a kind of nerve and positions electro photoluminescence pen, it is characterised in that：Bag Electro photoluminescence housing and the control circuit unit being arranged in housing, stimulating electrode is included, the control circuit unit includes micro-control Device processed, output circuit, power circuit, indicating circuit and motion detection circuit, the microcontroller and output circuit, indicating circuit Electrical connection, the output circuit are electrically connected with stimulating electrode, and the stimulating electrode is electrically connected with motion detection circuit, the detection Circuit output end is electrically connected with microcontroller, and the power circuit is electrically connected with microcontroller, output circuit.

Further, the output circuit core component adopts highly integrated boost converter TPS61161, wherein The CTRL ends of TPS61161 are connected with microcontroller output, connect inductance L1 between the VIN ends and SW ends of TPS61161, The VIN ends of TPS61161 are also connected with battery B1 in parallel, electric capacity C1 one end, battery B1, electric capacity C1 other ends ground connection, The SW ends of TPS61161 also series voltage stabilizing diode D1, Zener diode D1 rear ends are sequentially connected filter capacitor C2 one end, load RL one end, filter capacitor C2 other ends ground connection, loads the FB ends that the RL other ends are connected to TPS61161, and the FB ends of TPS61161 are also Difference connecting detection resistance R1, R2, R3, R4 one end, resistance R1, R2, R3, R4 other end meet switching tube Q1, Q2, Q3, Q4 respectively Drain electrode, the grid of switching tube Q1, Q2, Q3, Q4 electrically connected with microprocessor, the source ground of switching tube Q1, Q2, Q3, Q4.

Further, the FB ends of the TPS61161 chips are also connected with the Zener diode D2 for overvoltage protection.

Further, the COMP ends of the TPS61161 chips are also associated with the electric capacity C3 for current compensation.

Further, the microcontroller be single-chip microcomputer, DSP, FPGA any one.

Further, the motion detection circuit adopts integrated digital acceleration transducer AIS328DQ.

The beneficial effects of the utility model are：

(1) nerve positioning electro photoluminescence pen of the present utility model adopts percutaneous localization method, belongs to noninvasive location technology, Avoid causing tissue unnecessary wound.

(2) motion detection technique is adopted in nerve positioning electro photoluminescence pen of the present utility model, and according to corresponding muscle group Activity situation, adjust automatically output current, so that realize the objective evaluation to nerve positioning.

(3) micro-power device is adopted in nerve positioning electro photoluminescence pen of the present utility model, using pulsewidth modulation (PWM) Consistent output current, realizes that constant current type square-wave pulse is exported, eliminates the impact of Skin Resistance change.

(4) control circuit and two stimulating electrodes are all integrated into pen by nerve positioning electro photoluminescence pen of the present utility model It is interior, it is to avoid the trouble of connection stimulating electrode.

(5) using inexpensive electronic devices and components in nerve positioning electro photoluminescence pen of the present utility model, can be used as once Property product use, it is to avoid the cross-infection between patient, also eliminate the expense produced by sterilization.

The technique effect of design of the present utility model, concrete structure and generation is made furtherly below with reference to accompanying drawing It is bright, to be fully understood from the purpose of this utility model, feature and effect.

Description of the drawings

Fig. 1 is overall structure block diagram of the present utility model.

Fig. 2 is impulse output circuit figure of the present utility model.

Fig. 3 is motion detection circuit figure of the present utility model.

Reference：Microcontroller (1), output circuit (2), power circuit (3), indicating circuit (4), motion detection circuit (5)。

Specific embodiment

As shown in figure 1, a kind of nerve positions electro photoluminescence pen, it is characterised in that：Including electro photoluminescence housing and setting Control circuit unit, stimulating electrode in the housing, the control circuit unit include microcontroller 1, output circuit 2, power supply Circuit 3, indicating circuit 4 and motion detection circuit 5, the microcontroller 1 are electrically connected with output circuit 2, indicating circuit 4, described Output circuit 2 is electrically connected with stimulating electrode, and the stimulating electrode is electrically connected with motion detection circuit 5, and the detection circuit 5 is exported End is electrically connected with microcontroller 1, and the power circuit 3 is electrically connected with microcontroller 1, output circuit 2.

As shown in Fig. 2 for the impulse output circuit figure of the utility model patent, core component adopts highly integrated boosting Converter TPS61161, is integrated with 40V power switches, the internal reference voltage with 200mV ± 2%.Wherein TPS61161's CTRL ends are connected with 1 output end of microcontroller, connect inductance L1, the VIN of TPS61161 between the VIN ends and SW ends of TPS61161 End is also connected with battery B1 in parallel, electric capacity C1 one end, battery B1, electric capacity C1 other ends ground connection, and the SW ends of TPS61161 are also gone here and there Connection Zener diode D1, Zener diode D1 rear ends are sequentially connected filter capacitor C2 one end, load RL one end, and filter capacitor C2 is another One end is grounded, and loads the RL other ends and is connected to the FB ends of TPS61161, the FB ends of TPS61161 be also respectively connected with detection resistance R1, R2, R3, R4 one end, resistance R1, R2, R3, R4 other end connect the drain electrode of switching tube Q1, Q2, Q3, Q4 respectively, switching tube Q1, Q2, The grid of Q3, Q4 is electrically connected with microprocessor, the source ground of switching tube Q1, Q2, Q3, Q4, the FB of the TPS61161 chips End is also connected with the Zener diode D2 for overvoltage protection, and the COMP ends of the TPS61161 chips are also associated with mending for electric current The electric capacity C3 for repaying.

Whole circuit constitutes boost pulse conversion circuits, by the input voltage conversion from a section lithium ion battery B1 Into the up to output voltage of 38V.And according to output current, outputting current steadily is being arranged by pulsewidth modulation (PWM) technology Value, IC1 internal oscillators are operated in 600kHz.Its course of work is：Battery B1 gives IC1 and inductance Jing after electric capacity C1 filtering L1, IC1 it is upper electricity after be in holding state, but its control end (CTRL) receive control send pulse when, pulse in height During level, IC1 starts working, and its internal oscillator makes internal power switch (SW) switch over the frequency of 600kHz.When Switch (SW) in connect when, one end of inductance L1 is connected with power supply, the other end by switch be grounded, the electric current in L1 with when Between linear rise.When (SW) shut-off is switched, as the electric current in inductance can not be mutated, so producing anti-phase electricity at its two ends Pressure, turns on diode D1, and the energy for having stored in inductance is discharged in load, forms electric current in making load.Filter capacitor The effect of device C2 is to eliminate the burr in output current.Constant current principle control process is：Output current is through current sense resistor The feedback control end of IC1 is given after R1, R2, R3 or R4 sampling, and sampling voltage is compared with the reference voltage inside IC1 Compared with, when sampling voltage is more than reference voltage, illustrate that output current is excessive, at this moment the control circuit inside IC1 makes switch SW's Turn-on time shortens, thus the energy for being stored in making inductance every time is reduced, and declines output current.Conversely, when output is less When, IC1 increases each ON time of switch, the energy increase stored in making inductance L1, output current is increased.It is this negative Feedback procedure makes outputting current steadily in arranges value.Current sense resistor R1, R2, R3, R4 and switching tube Q1, Q2, Q3, Q4 are used for Output current range is selected, Zener diode D2 is used for protecting IC1, in order to avoid be burned out in output short-circuit.Electric capacity C3 plays compensation Effect, makes output current more stable.

Motion detection circuits of the Fig. 3 for the utility model patent.The circuit adopts integrated digital acceleration transducer AIS328DQ.This is a super low-power consumption, three axle linear acceleration sensors of high-performance, with digital serial interface SPI standard Output.Optionally ± 2g, ± 4g, ± 8g full scales, measurement frequency scope are 0.5Hz～1kHz.The sensor is arranged on to stimulate On electrode, when the nerve for arranging muscle group is upset, you can perceive the motion of muscle group, and by the size of acceleration of motion Data signal is converted into, microcontroller is sent to.

Preferred embodiment of the present utility model described in detail above.It should be appreciated that the ordinary skill people of this area Member just can make many modifications and variations according to design of the present utility model without the need for creative work.Therefore, all this technology necks In domain, technical staff passes through logic analysis, reasoning or limited reality on the basis of existing technology according to design of the present utility model Available technical scheme is tested, all should be in the protection domain being defined in the patent claims.

Claims (6)

1. a kind of nerve positions electro photoluminescence pen, it is characterised in that：Including electro photoluminescence housing and the control being arranged in housing Circuit unit processed, stimulating electrode, the control circuit unit include microcontroller (1), output circuit (2), power circuit (3), Indicating circuit (4) and motion detection circuit (5), microcontroller (1) are electrically connected with output circuit (2), indicating circuit (4), Output circuit (2) are electrically connected with stimulating electrode, and the stimulating electrode is electrically connected with motion detection circuit (5), the detection Circuit (5) output end is electrically connected with microcontroller (1), and power circuit (3) are electrically connected with microcontroller (1), output circuit (2) Connect.

2. a kind of nerve according to claim 1 positions electro photoluminescence pen, it is characterised in that：Output circuit (2) Core component adopts highly integrated boost converter TPS61161, and the CTRL ends of wherein TPS61161 are defeated with microcontroller (1) Go out end connection, between the VIN ends and SW ends of TPS61161, connect inductance L1, the VIN ends of TPS61161 also with battery B1 in parallel, Electric capacity C1 one end connects, battery B1, electric capacity C1 other ends ground connection, the SW ends also series voltage stabilizing diode D1 of TPS61161, voltage stabilizing Diode D1 rear ends are sequentially connected filter capacitor C2 one end, load RL one end, and filter capacitor C2 other ends ground connection loads RL another End is connected to the FB ends of TPS61161, and the FB ends of TPS61161 are also respectively connected with detection resistance R1, R2, R3, R4 one end, resistance R1, R2, R3, R4 other end connects the drain electrode of switching tube Q1, Q2, Q3, Q4, the grid and Wei Chu of switching tube Q1, Q2, Q3, Q4 respectively Reason device electrical connection, the source ground of switching tube Q1, Q2, Q3, Q4.

3. a kind of nerve according to claim 2 positions electro photoluminescence pen, it is characterised in that：The TPS61161 chips FB ends be also connected with the Zener diode D2 for overvoltage protection.

4. a kind of nerve according to claim 2 positions electro photoluminescence pen, it is characterised in that：The TPS61161 chips COMP ends be also associated with the electric capacity C3 for current compensation.

5. a kind of nerve according to claim 2 positions electro photoluminescence pen, it is characterised in that：Microcontroller (1) For single-chip microcomputer, DSP, FPGA any one.

6. a kind of nerve according to claim 1 positions electro photoluminescence pen, it is characterised in that：The motion detection circuit (5) adopt integrated digital acceleration transducer AIS328DQ.