CN203524735U - Extracorporeal shock wave lithotripter and charging and discharging circuits therefor - Google Patents
Extracorporeal shock wave lithotripter and charging and discharging circuits therefor Download PDFInfo
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- CN203524735U CN203524735U CN201320685714.1U CN201320685714U CN203524735U CN 203524735 U CN203524735 U CN 203524735U CN 201320685714 U CN201320685714 U CN 201320685714U CN 203524735 U CN203524735 U CN 203524735U
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Abstract
The utility model discloses an extracorporeal shock wave lithotripter and charging and discharging circuits therefor. The extracorporeal shock wave lithotripter comprises a shock weave generation device; the shock weave generation device comprises a charging circuit and a discharging circuit; the charging circuit is formed by a resistor and a capacitor; the discharging circuit is formed by the capacitor, a high voltage switch and a shock wave source device; the capacitance of the capacitor is from 1.5 microfarads to 2.5 microfarads; the shock weave focus pressure peak generated through the shock wave source device due to capacitor discharging is from 6 MPa to 30 MPa; the bottom pulse width is from 3 microseconds to 4 microseconds. The extracorporeal shock wave lithotripter has the advantages of being wide in bottom width of generated shock waves and smooth in pressure, enabling the focus pressure value of the shock waves to be small and reducing side effect to human bodies due to the fact that calculuses are fragmented due to stress concentration.
Description
Technical field
This utility model relates to medical instruments field, relates in particular to a kind of extra chock wave lithotriptor and for the charge-discharge circuit of extra chock wave lithotriptor.
Background technology
Along with the development of medical skill, extra chock wave lithotriptor is more and more employed.More thorough for what the calculus in body was smashed, the focal pressure of shock wave is designed
?more and more higher.Yet what bring therewith is the limit of bearing that the pressure of shock wave has surpassed human body soft tissue, has caused the damage of human body soft tissue.Therefore, how to provide that a kind of less or undamaged extra chock wave lithotriptor is current urgent problem to injury of human.
Summary of the invention
The purpose of this utility model is to provide a kind of extra chock wave lithotriptor, when pulverizing calculosis, reduces or avoids the injury to human body soft tissue.
Based on above-mentioned purpose, this utility model provides a kind of extra chock wave lithotriptor, comprise blast wave generating apparatus, described blast wave generating apparatus comprises charging circuit and discharge circuit, described charged electrical routing resistance and electric capacity form, described discharge circuit is by described electric capacity, high-voltage switch gear and shock wave wave source device are composed in series successively, the capacitance of described electric capacity is 1.5 μ F～2.5 μ F, through described electric capacity, to the focal pressure peak value of the shock wave of described shock wave wave source device discharge generation, be 6MPa～30MPa, the bottom pulsewidth of described shock wave is 3 μ s～4 μ s.
Preferably, the charging voltage of described charging circuit is 5000V～11000V.
Preferably, described capacitance is 1.6 μ F～2.4 μ F.
Preferably, described shock wave wave source device is any in electromagnetic type wave source, electrohydraulic type wave source and piezoelectric type wave source.
Preferably, described shock wave wave source device is electromagnetic type wave source, described electromagnetic type wave source comprises one end is connected with described electric capacity and the other end is connected with described high-voltage switch gear coil, and described the coil metallic membrane, the water-filled leather bag that are oppositely arranged and be arranged on the insulating barrier between described coil and metallic membrane, and described coil and described metallic membrane are arranged in the inner chamber body of described leather bag.
Preferably, described coil is monolayer spiral spherical coil, and the number of turn of described coil is 15～30, and the diameter of described coil is 65mm～130mm, and described coil is formed by copper wire winding, and described metallic membrane is copper film, and the thickness of described copper film is 0.1mm～0.3mm;
Wherein, the cross section of described copper cash is circular, and the diameter of described circle is 0.5mm～2.5mm; Or the cross section of described copper cash is rectangle, the area of described rectangle is 0.5 mm～2.5, mm * 0.5 mm * 1.5 mm.
Preferably, described shock wave has malleation section and negative pressure section, and the cracked direction of the calculus that the cracked direction of the calculus that described malleation section causes causes with described negative pressure section is vertical.
This utility model also provides a kind of charge-discharge circuit, be applied in as in above-mentioned any extra chock wave lithotriptor, the charged electrical routing resistance of described charge-discharge circuit and electric capacity form, the discharge circuit of described charge-discharge circuit is by described electric capacity, high-voltage switch gear and shock wave wave source installation composition, and the capacitance of described electric capacity is 1.5 μ F～2.5 μ F.
Preferably, described capacitance is 1.6 μ F～2.4 μ F.
Preferably, the charging voltage of described charging circuit is 5000V～11000V.
The beneficial effects of the utility model are:
This utility model is selected the electric capacity of 1.5 μ F～2.5 μ F, and makes the focal pressure peak value of the shock wave that produces at 6 MPa～30MPa, and bottom pulsewidth is at 3 μ s～4 μ s.Because the pressure of shock wave is little, curve head relaxes, and major part penetrates in calculus, causes stress concentration, and pulsewidth length is that persistent period of shock wave is long, has caused accumulated damage, thereby has realized the cracked of calculus.And the pressure of shock wave is little, major part has been entered calculus thoroughly, so the pressure that reflection produces is few, therefore greatly reduces the damage to human body soft tissue.
Accompanying drawing explanation
Fig. 1 is the blast wave generating apparatus structure chart in this utility model;
Fig. 2 is the self-focusing electromagnetic type impact wave generating means structure chart in this utility model;
Fig. 3 is the charge-discharge circuit structure chart in this utility model;
Fig. 4 is the oscillogram of the shock wave of the extra chock wave lithotriptor generation in this utility model;
Fig. 5 is the shock wave of the extra chock wave lithotriptor generation in this utility model and the schematic diagram that calculus is met;
Fig. 6 is the oscillogram of the shock wave of extra chock wave lithotriptor generation of the prior art;
Fig. 7 is the schematic diagram that the shock wave that produces of the extra chock wave lithotriptor of prior art and calculus are met.
The specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, obviously, described embodiment is only this utility model part embodiment, rather than whole embodiment.Embodiment based in this utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of this utility model protection.
Extra chock wave lithotriptor all needs a blast wave generating apparatus.This blast wave generating apparatus comprises a charge-discharge circuit.Fig. 1 shows this charge-discharge circuit.It specifically comprises charging circuit 1 and discharge circuit 2, and wherein charging circuit 1 is comprised of resistance 11 and electric capacity 12, and discharge circuit is composed in series successively by electric capacity 12, high-voltage switch gear 13 and shock wave wave source device 14.First electric capacity 12 is charged, the rear conducting high-voltage switch gear 13 that charged, electric capacity 12 just produces shock wave to shock wave wave source device 14 instantaneous discharges.Wherein, electric discharge has two kinds of patterns, and a kind of is manually electric discharge, is exactly by a switch 13, puts once electricity.Another kind is exactly continuous discharge, by given frequency electric discharge.The frequency of this electric discharge can be set as required.As 30 times per minute.
At present conventional shock wave wave source device 14 has three kinds, electromagnetic type wave source, electrohydraulic type wave source and piezoelectric type wave source.For making this utility model clearer, below take self-focusing electromagnetic type impact wave generating means as example, this utility model is described in detail.
Fig. 2 is for adopting the schematic diagram of the calculus 37 in self-focusing electromagnetic type impact wave generating means treatment human kidney 36.Self-focusing electromagnetic type impact wave generating means specifically comprises charging circuit and discharge circuit, and wherein charged electrical routing resistance 31 and electric capacity 32 form, and discharge circuit is composed in series successively by electric capacity 32, high-voltage switch gear 33 and electromagnetic shock-wave wave source device 34.Metallic membrane 342, water-filled leather bag 343 and substrate 344 that wherein electromagnetic shock-wave wave source device 34 comprises one end is connected with electric capacity 32 and the other end is connected with high-voltage switch gear 33 coil 341, is oppositely arranged with coil 341.Its coil 341 and metallic membrane 342 are arranged in the inner chamber body of leather bag 343, between coil 341 and metallic membrane 342, are provided with insulating barrier (not shown).Electric capacity 32 is through being wired to coil 341, and leather bag 343 is close to the skin 35 of human body.Its coil 341 is preferably monolayer spiral spherical coil, can be formed by copper wire winding, and metallic membrane 342 can be selected copper film.
In Fig. 3, the mode of the equivalent circuit diagram of the circuit forming with capacitor C, resistance R, high-voltage switch gear G and inductance L illustrates the charge-discharge circuit of self-focusing electromagnetic type wave source.Wherein inductance L is obtained by coil 342 equivalences in essence.Charging voltage in this utility model can be obtained through high-tension transformer transformation then by alternating voltage after rectifier rectification.
The operation principle of this self-focusing electromagnetic type wave source is for to be charged to given voltage to capacitor C, by high-voltage switch gear G, capacitor C completes once electric discharge, in coil, produce By Impulsive Current, when this By Impulsive Current flows through coil 341, in metallic membrane 342, produce faradic current, repel mutually in two electric current formed magnetic fields, make metallic membrane 342 produce a very brief and motion fast, thereby in water, drive out a strong pressure pulses and propagate, form shock wave.
Existing extra chock wave lithotriptor is larger to the injury of human body.The focal pressure peak value that this injury mainly comes from the shock wave that existing lithotrite produces is large, and frequency is high causes.For reducing the injury to human body, need to reduce pressure and the frequency of this shock wave.In shock wave stone crusher, the focal pressure peak value of shock wave is determined the transfer capability of electric energy by capacitance, charging voltage value and shock wave wave source device, and impact wave frequency, mainly by capacitance, is determined in vitro.Based on this, applicant has carried out test of many times, finally obtained a kind ofly can well completing external stone crushing, side effect is simultaneously especially little extra chock wave lithotriptor again, as follows: the capacitance of the capacitor C of this extra chock wave lithotriptor employing is 1.5 μ F～2.5 μ F.Highly preferred, this capacitance is 1.6 μ F～2.4 μ F.Via above-mentioned capacitor discharge, produce a shock wave, the focal pressure peak value of the shock wave that lithotrite of the present utility model produces is 6MPa～30MPa, and bottom pulsewidth is 3 μ s～4 μ s.Its waveform specifically as shown in Figure 4.
Known according to formula W=CU2, the energy of capacitor discharge determines jointly by capacitance and charging voltage, and final electric energy converts mechanical energy to and also depends on the transfer capability of shock wave generator to electric energy.Therefore, those skilled in the art can choose suitable charging voltage to the transfer capability of electric energy according to different shock wave generators.In specific embodiment of the utility model, the scope of charging voltage can be between 5000V～11000V.
When adopting above-mentioned self-focusing electromagnetic type wave source, consider service life and effect, the number of turn of its coil 341 is preferably 15～30, and diameter is 65mm～130mm, and coil 341 is formed by copper wire winding.When to select cross section be circular copper cash, its diameter range is 0.5mm～2.5mm.When selecting cross section to be the copper cash of rectangle, the cross-sectional area of this rectangle is 0.5 mm～2.5, mm * 0.5 mm * 1.5 mm.Metallic membrane 342 is copper film, and its thickness is 0.1mm～0.3mm.
We know, existing extra chock wave lithotriptor is all to rely on the instantaneous rubble smashing in human body of high pressure, and focal pressure peak value is generally all more than 60MPa.And the focal pressure peak value of the shock wave that extra chock wave lithotriptor in this utility model produces is at 6 MPa～30MPa, though the focal pressure peak value of the shock wave producing much smaller than existing extra chock wave lithotriptor, but find same experiment calculus, the lithotrity effect that it can be realized ideal equally through experiment.With electric capacity, between 1.5 μ F～2.5 μ F, the extra chock wave lithotriptor that focal pressure peak value is 16MPa is example, and its electric discharge through 644 left and right can complete rubble.Take electric capacity of the prior art as 1 μ F, and the extra chock wave lithotriptor that focal pressure peak value is 60MPa is example, and it need to complete rubble through 676 left and right.To existing extra chock wave lithotriptor, rely on the extra chock wave lithotriptor in high pressure rubble and this utility model to rely on mechanism and the effect of low-pressure rubble to carry out comparative illustration below.
Fig. 4 shows a concrete waveform of the shock wave of the extra chock wave lithotriptor generation in this utility model, and focal pressure peak value is about 16MPa, and bottom pulsewidth is 3 μ s.Situation when Fig. 5 shows shock wave shown in Fig. 4 and calculus and meets.Fig. 6 shows a concrete waveform of the shock wave of existing extra chock wave lithotriptor (electric capacity is 1 μ F) generation, and focal pressure peak value is about 60MPa, and bottom pulsewidth is 2 μ s.Situation when Fig. 7 shows shock wave shown in Fig. 6 and calculus and meets.What the longitudinal axis of Fig. 4 and Fig. 6 represented is the force value of shock wave, and unit is MPa, and transverse axis is the time, and unit is μ s.
For the shock wave shown in Fig. 4, because its focal pressure peak value is little, bottom pulsewidth is wider, and head relatively relaxes, be that frequency is low, so when it runs into calculus, most of energy has entered calculus (as shown in Figure 4) thoroughly, has run into the impurity that is originally present in calculus inside, little defect or microcrack, just caused high stress concentrations, induced stress that Here it is, has caused original impurity or microcrack constantly to expand under the effect of this stress, becomes accumulated damage.And due to the wider time span that increased of bottom pulsewidth of the shock wave in this utility model, therefore make accumulated damage more obvious.Along with each repetition of electric discharge, microcrack progressively expands, and runs up to a certain degree, and calculus is cracked collapse just.This is a kind of different mechanism of stone destroy, and we are referred to as induced stress effect.Induced stress is always tensile stress, perpendicular or parallel in the shock wave direction of motion.
Shock wave shown in Fig. 4 is comprised of malleation section I and negative pressure section II, and Fig. 5 shows respectively the cracked situation of malleation section I and negative pressure section II calculus.Wherein the shock wave direction of malleation section I and the cracked direction of caused calculus are parallel, and the shock wave direction of negative pressure section II is vertical with the cracked direction of caused calculus.Be that the cracked direction of the caused calculus of shock wave of malleation section I and the cracked direction of the caused calculus of shock wave of negative pressure section II are vertical.The plane of disruption of calculus certainly leads in the induced stress that reaches at first calculus comprehensively and is greater than on the section of bursting stress of calculus, thereby causes the fracture of calculus.
For the shock wave shown in Fig. 6, first the part of process is malleation from left to right, with
period represents (see figure 7).Because the rate of change of focal pressure peak value place curve is large, pressure is precipitous, and when shock wave and calculus are met, most of baroreflex has fallen.Because its focal pressure peak value is large, add reflected pressure, just directly calculus is broken into pitting.In the inside, hole of calculus, be full of the powder of calculus, by the time entered
period (see figure 7), namely negative pressure section works, and the powder of staying in hole is kicked up, and has done useless merit.
The focal pressure peak value of the shock wave shown in focal pressure peakedness ratio Fig. 4 of the shock wave shown in above-mentioned Fig. 6 is large 3.75 times, add shock wave shown in Fig. 6, periphery in calculus, pressure is again because reflection increases, so now the circumferential pressure of calculus becomes very large, and near soft tissue is caused to very serious damage.And above-mentioned pressure cataclysm is very large, the cavitation effect of generation is strong, thereby the infringement causing is also very large.And the pressure of the shock wave shown in Fig. 4 itself is less, and when running into calculus, major part has been entered calculus thoroughly, the pressure increasing because of reflection is very little, so now the circumferential pressure of calculus is very little, and the cavitation effect producing is also very little, thus near soft tissue almost without any side effect.
Corresponding with above-mentioned extra chock wave lithotriptor, this utility model also provides a kind of charge-discharge circuit being applied in this extra chock wave lithotriptor, be applied in as in above-mentioned any extra chock wave lithotriptor, the charged electrical routing resistance of this charge-discharge circuit and electric capacity form, the discharge circuit of this charge-discharge circuit is by described electric capacity, high-voltage switch gear and shock wave wave source installation composition, and wherein the capacitance of electric capacity is 1.5 μ F～2.5 μ F.
Highly preferred, this capacitance is 1.6uF-2.4uF.Known according to formula W=CU2, the energy of capacitor discharge determines jointly by capacitance and charging voltage, and final electric energy converts mechanical energy to and also depends on the transfer capability of shock wave generator to electric energy.Therefore, those skilled in the art can choose suitable charging voltage to the transfer capability of electric energy according to different shock wave generators.In specific embodiment of the utility model, the scope of charging voltage can be between 5000V-11000V.
Above specific embodiment, the purpose of this utility model, technical scheme and beneficial effect are further described, institute it should be noted, these are only a specific embodiment of the present utility model, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model this utility model.Like this, if within of the present utility model these are revised and modification belongs to the scope of this utility model claim and equivalent technologies thereof, this utility model is also intended to comprise these changes and modification interior.
Claims (10)
1. an extra chock wave lithotriptor, comprise blast wave generating apparatus, it is characterized in that, described blast wave generating apparatus comprises charging circuit and discharge circuit, described charged electrical routing resistance and electric capacity form, described discharge circuit is composed in series successively by described electric capacity, high-voltage switch gear and shock wave wave source device, the capacitance of described electric capacity is 1.5 μ F～2.5 μ F, through described electric capacity, to the focal pressure peak value of the shock wave of described shock wave wave source device discharge generation, be 6MPa～30MPa, the bottom pulsewidth of described shock wave is 3 μ s～4 μ s.
2. extra chock wave lithotriptor as claimed in claim 1, is characterized in that, the charging voltage of described charging circuit is 5000V～11000V.
3. extra chock wave lithotriptor as claimed in claim 1, is characterized in that, described capacitance is 1.6 μ F～2.4 μ F.
4. extra chock wave lithotriptor as claimed in claim 1, is characterized in that, described shock wave wave source device is any in electromagnetic type wave source, electrohydraulic type wave source and piezoelectric type wave source.
5. extra chock wave lithotriptor as claimed in claim 1, it is characterized in that, described shock wave wave source device is electromagnetic type wave source, described electromagnetic type wave source comprises one end is connected with described electric capacity and the other end is connected with described high-voltage switch gear coil, and described the coil metallic membrane, the water-filled leather bag that are oppositely arranged and be arranged on the insulating barrier between described coil and metallic membrane, and described coil and described metallic membrane are arranged in the inner chamber body of described leather bag.
6. extra chock wave lithotriptor as claimed in claim 5, it is characterized in that, described coil is monolayer spiral spherical coil, the number of turn of described coil is 15～30, the diameter of described coil is 65mm～130mm, described coil is formed by copper wire winding, and described metallic membrane is copper film, and the thickness of described copper film is 0.1mm～0.3mm;
Wherein, the cross section of described copper cash is circular, and the diameter of described circle is 0.5mm～2.5mm; Or the cross section of described copper cash is rectangle, the area of described rectangle is 0.5 mm～2.5, mm * 0.5 mm * 1.5 mm.
7. extra chock wave lithotriptor as claimed in claim 1, is characterized in that, described shock wave has malleation section and negative pressure section, and the cracked direction of the calculus that the cracked direction of the calculus that described malleation section causes causes with described negative pressure section is vertical.
8. a charge-discharge circuit, be applied in as described in extra chock wave lithotriptor in any one of claim 1-7, it is characterized in that, the charged electrical routing resistance of described charge-discharge circuit and electric capacity form, the discharge circuit of described charge-discharge circuit is by described electric capacity, high-voltage switch gear and shock wave wave source installation composition, and the capacitance of described electric capacity is 1.5 μ F～2.5 μ F.
9. charge-discharge circuit as claimed in claim 8, is characterized in that, described capacitance is 1.6 μ F～2.4 μ F.
10. charge-discharge circuit as claimed in claim 8, is characterized in that, the charging voltage of described charging circuit is 5000V～11000V.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103536339A (en) * | 2013-11-01 | 2014-01-29 | 杜锡鑫 | Extracorporeal shock wave lithotripter and charge-discharge circuit for same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103536339A (en) * | 2013-11-01 | 2014-01-29 | 杜锡鑫 | Extracorporeal shock wave lithotripter and charge-discharge circuit for same |
| WO2015062306A1 (en) * | 2013-11-01 | 2015-05-07 | 苏州市锡鑫医疗器械有限公司 | Extracorporeal shock wave lithotripter and charging and discharging circuit for extracorporeal shock wave lithotripter |
| CN103536339B (en) * | 2013-11-01 | 2015-11-25 | 杜锡鑫 | Extra chock wave lithotriptor and the charge-discharge circuit for extra chock wave lithotriptor |
| US10194930B2 (en) | 2013-11-01 | 2019-02-05 | Suzhou Xixin Medical Instruments Co., Ltd. | Extracorporeal shock wave lithotripter and charging and discharging circuit for extracorporeal shock wave lithotripter |
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