CN2537353Y

CN2537353Y - Compound pulse circuit of external impact wave stone crasher

Info

Publication number: CN2537353Y
Application number: CN 02227867
Authority: CN
Inventors: 陈忠兴; 郑连伟
Original assignee: Zhanjiang Economic And Technological Development Zone Haibin Medical Equipment Co ltd
Current assignee: Zhanjiang Economic And Technological Development Zone Haibin Medical Equipment Co ltd
Priority date: 2002-05-24
Filing date: 2002-05-24
Publication date: 2003-02-26
Anticipated expiration: 2012-05-24

Abstract

The utility model relates to a complex pulse circuit of external shock wave calculus crusher, comprising a charging/discharging circuit and a control circuit. The utility model is characterized in that two pulses are successively generated at specified time intervals, the first pulse generates large amount of fine bubbles around or inside the calculus, namely cavitation effect; when the bubbles reach peak, the second pulse is applied timely to enhance the expansion and breakage of the bubbles as well as the cavitation effect generated by the first pulse. The utility model has the advantages that the crushing rate is over 40%, and the impairment to tissue of patient suffering from diseases of renal calculus, ureteric calculus, vesical calculus, urethral calculus, gallbladder calculus and choledocholithiasis can be alleviated to some extent.

Description

Extra chock wave lithotriptor twin pulse circuit

Technical field

This utility model extra chock wave lithotriptor twin pulse circuit belongs to the circuit of medical science surgical instruments, device, especially for extra chock wave lithotriptor twin pulse circuit.

Background technology

At present, world today's extracorporeal lithotiptor has various, and the shock wave source of extra chock wave lithotriptor has electrohydraulic type, electromagnetic type, piezoelectric type, laser type, explosion type etc., and lithotrity effect is that electric-liquid type is best.For example patent 97250984.4 general double end extracoporeal shock wave lithotripsy, patent 99256092.6 extra chock wave lithotriptors, patent 00204846.9 extracorporeal lithotiptor seismic wave generator etc.; though can finish power conversion effectively; required exploring block is few; can be under minimum energy density broken calculus; the protection body preserves from, but location and calculus crushing effect are not very good.

Technology contents

The purpose of this utility model provides a kind of extra chock wave lithotriptor twin pulse circuit, in specified time interval, recur two impulse waves, impulse wave reaches inner a large amount of micro air bubbles that produce around calculus for the first time, it is cavitation effect, when the peak that its bubble produces, for the second time impulse wave in good time and extremely, strengthen bubble expansion, break, strengthen the cavitation effect of previous impulse wave, improve calculifragous efficiency.

This utility model is made up of charge-discharge circuit and control circuit two parts, charge-discharge circuit is by A.C. contactor KM, pressure regulator 1T, high-tension transformer 2T, 3T, trigger transformator 4T, 5T, kenotron 1V, 2V, high-voltage capacitor 1C, 2C, high-power trigger CF1, CF2, sparking electrode DJ forms, lithotrite is connected alternating current 220V, behind the 50Hz power supply, the normally opened contact adhesive of A.C. contactor KM, the charge-discharge circuit power supply, the output voltage of pressure regulator 1T is through high-tension transformer 2T, 3T boosts, again through kenotron 1V, after the 2V rectification to high-voltage capacitor 1C, the 2C energy storage of charging, high direct voltage is added to high-power trigger CF1, CF2 and electrode DJ series circuit two ends.Control circuit is made up of Programmable Logic Controller PLC, the strong K of continuous trigger function, solid-state relay KV1, KV2, when lithotrite carries out, continuous trigger function is good for the K closure, the signal input part X0 of Programmable Logic Controller PLC becomes 1 from 0, after Programmable Logic Controller PLC carries out calculation process, outfan Y0, Y1 export two groups of start pulse signals respectively, deliver to the input of solid-state relay KV1, KV2, the time difference Δ t=t of these two groups of start pulse signals ₁-t ₂Adjust between the 0.1-1 millisecond,, then end during low level 0V, when Y0 sends start pulse signal for the first time, KV when solid-state relay KV1, then conducting when the KV2 input is high level 12V ₁Input is then conducting of high level, trigger the elementary winding of transformator 4T and obtain electric 220V, its secondary generation high pressure 8000V, add on the trigger electrode of high-power trigger CF1, make high-power trigger CF1 conducting, electric charge on the high-voltage capacitor 1C produces trigger impulse for the first time by the electrode instantaneous discharge, through Δ t after second, the trigger impulse second time that Y1 sends, make solid-state relay KV2, high-power trigger CF2 conducting in succession, high-voltage capacitor 2C produces second trigger impulse by the electrode instantaneous discharge, just can produce two subpulses whenever for the strong closure signal of K of triggering function.This utility model is reasonable in design, and is simple in structure, improves the rubble rate and reaches more than 40%, can also reduce the damage to renal calculus, ureteral calculus, vesical calculus and calculus of urethra and cholelithiasis, patients with choledocholith tissue to a certain extent.

Description of drawings Fig. 1 is this utility model circuit diagram; Fig. 2 is two groups of start pulse signal figure of this utility model.

The specific embodiment is in this utility model, as shown in Figure 1: pressure regulator 1T can adopt 3KVA in charge-discharge circuit, voltage can be transferred in 0～250V, the voltage of high-tension transformer 2T, 3T is in 20000V/200V, trigger transformator 4T, 5T in 8000/220V, kenotron 1V, 2V adopt 30KV, 0.2A, high-voltage capacitor 1C, 2C are 20KV, 0.4 μ f; Programmable Logic Controller PLC can adopt FX2N-32MR in control circuit.Lithotrite is connected alternating current 220V, behind the 50Hz power supply, under charge-discharge circuit and control circuit effect, produces twin pulse, promptly produces the dipulse of two cavitation effects.Impulse wave reaches inner a large amount of micro air bubble that produces around calculus for the first time, it is cavitation effect, when the peak that its bubble produces, pulse for the second time in good time and extremely, the generation of aggravation bubble, expand, break, strengthen the cavitation effect of previous impulse wave, produce two cavitation effects, raising rubble rate, studies have shown that in present external and body the twin pulse lithotrite can obviously improve calculifragous efficiency and reach more than 40%.Propagate by aqueous medium by the shock wave that the lithotrite shock wave source sends, enter human body soft tissue then, arrive calculus surfaces again, because the acoustic impedance of human body soft tissue and water shock wave is very little, therefore and the acoustic impedance of calculus is very big, and is bigger nearly 8 times than human body soft tissue, when calculus is on the focus of shock wave, the shock wave of 20～50Mpa pressure produces very strong compressive stress and tension to calculus, and the cavitation effect of supervening will make calculus be crushed to the fineness that is enough to excrete.Study and experimental results show that two impulse waves that in specified time interval, recur, make the release of energy more concentrated, make many refracted waves, diffraction involve echo more concentrated sensing calculus center under the influence of the pulse second time, make the focusing range of shock wave littler.So twin pulse can not only improve calculifragous efficiency, can also reduce damage to a certain extent to renal calculus, ureteral calculus, vesical calculus and calculus of urethra and cholelithiasis, patients with choledocholith tissue.And for example shown in Figure 2: after the pulse first time, control Δ t sends pulse for the second time in the 0.1-1 millisecond, form twin pulse, improves the rubble rate and reaches more than 40%.

Claims

1, a kind of extra chock wave lithotriptor twin pulse circuit, form by charge-discharge circuit and control circuit two parts, it is characterized in that charge-discharge circuit is by A.C. contactor KM, pressure regulator 1T, high-tension transformer 2T, 3T, trigger transformator 4T, 5T, kenotron 1V, 2V, high-voltage capacitor 1C, 2C, high-power trigger CF1, CF2, sparking electrode DJ forms, lithotrite is connected alternating current 220V, behind the 50Hz power supply, the normally opened contact adhesive of A.C. contactor KM, the charge-discharge circuit power supply, the output voltage of pressure regulator 1T is through high-tension transformer 2T, 3T boosts, again through kenotron 1V, after the 2V rectification to high-voltage capacitor 1C, the 2C energy storage of charging, high direct voltage is added to high-power trigger CF1, CF2 and electrode DJ series circuit two ends.Control circuit is made up of Programmable Logic Controller PLC, the strong K of continuous trigger function, solid-state relay KV1, KV2, when lithotrite carries out, continuous trigger function is good for the K closure, the signal input part X0 of Programmable Logic Controller PLC becomes 1 from 0, after Programmable Logic Controller PLC carries out calculation process, outfan Y0, Y1 export two groups of start pulse signals respectively, deliver to the input of solid-state relay KV1, KV2, the time difference Δ t=t of these two groups of start pulse signals ₁-t ₂Adjust between the 0.1-1 millisecond, make up solid-state relay KV1, then conducting when the KV2 input is high level 12V, then end during low level 0V, when Y0 sends start pulse signal for the first time, the KV1 input is then conducting of high level, trigger the elementary winding of transformator 4T and obtain electric 220V, its secondary generation high pressure 8000V, add on the trigger electrode of high-power trigger CF1, make high-power trigger CF1 conducting, electric charge on the high-voltage capacitor 1C produces trigger impulse for the first time by the electrode instantaneous discharge, after second, the trigger impulse second time that Y1 sends makes solid-state relay KV2 through Δ t, high-power trigger CF2 conducting in succession, high-voltage capacitor 2C produces second trigger impulse by the electrode instantaneous discharge, just can produce two subpulses whenever for the strong closure signal of K of triggering function.

2, according to the described extra chock wave lithotriptor twin pulse of claim 1 circuit, it is characterized in that pressure regulator 1T can adopt 3KVA in charge-discharge circuit, voltage can be transferred in 0～250V, the voltage of high-tension transformer 2T, 3T is in 20000V/200V, trigger transformator 4T, 5T in 8000V/220V, kenotron 1V, 2V adopt 30KV, 0.2A, high-voltage capacitor 1C, 2C are 20KV, 0.4 μ f; Programmable Logic Controller PLC can adopt FX2N-32MR in control circuit.

3, according to the described extra chock wave lithotriptor twin pulse of claim 1 circuit, it is characterized in that in control circuit the time difference Δ t=t of two groups of start pulse signals ₁-t ₂Adjust and be the 0.1-1 millisecond.

4,, it is characterized in that the pressure that calculus is in the focus of shock wave is 20-50Mpa according to the described extra chock wave lithotriptor twin pulse of claim 1 circuit.