CN201046159Y - Electric wave knife power generators - Google Patents
Electric wave knife power generators Download PDFInfo
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- CN201046159Y CN201046159Y CNU2007200699651U CN200720069965U CN201046159Y CN 201046159 Y CN201046159 Y CN 201046159Y CN U2007200699651 U CNU2007200699651 U CN U2007200699651U CN 200720069965 U CN200720069965 U CN 200720069965U CN 201046159 Y CN201046159 Y CN 201046159Y
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Abstract
The utility model discloses an electric wave knife power generator used for surgery treatment, which comprises a radio frequency (RF) oscillator stage, an RF buffer stage, an RF modulator stage, a modulator pulse stage, an RF initial amplifier stage, an RF driver stage, an RF power amplifier stage and an RF output stage; wherein, the RF oscillator stage is a sine wave oscillation circuit, which can generate high amplitude oscillation RF waves with frequency from 2 to 5 MHz; thus, the electric wave knife enables to use an antenna-type insulated neutral electrode, so as to avoid the unexpected burns due to the excessively small contact area in the neutral electrode of common high frequency electrotome. The utility model has the advantages that: the operation action range of the electrode can be highly concentrated, the unnecessary damage to the ambient healthy tissues can be effectively reduced or avoided, and thus achieving a better effect of cutting and blood coagulation. Therefore, the utility model can be widely applied to various surgeries, minimal invasive surgeries and precise surgeries, especially applicable to the operations on high impedance tissues, such as skin, tendon and ligament, which are beyond the capacity of common high frequency electrotomes.
Description
Technical field:
This utility model relates to a kind of surgical medical apparatus, particularly a kind of power generator that is used for the electric wave cutter.
Background technology:
High frequency electric knife also claims high frequency surgical equipment, is a kind ofly to replace mechanical scalpel and cut electrosurgical unit with blood coagulation.When it contact with human body by the most advanced and sophisticated high-frequency high-voltage current that produces of active electrode tissue is heated, realization is to the separation of when injected organism tissue and solidify, and cuts and the hemostatic purpose thereby play.The heating effect of high frequency electric knife is that the high frequency electric with high current density gathers together, directly destroy the pathological tissues that is under the most advanced and sophisticated contact point of active electrode, when contacting with active electrode or the temperature of adjoining tissue or cell when rising to protein denaturation in the cell, just produce the blood coagulation effect.
The rely high-frequency high-voltage current of work of common high frequency electric knife is that power generator by circuit part produces, and its operating frequency generally all is lower than 1MHz, and Single-pole electric knife only is 0.3～0.5MHz.The high frequency electric knife of this low operating frequency can produce following disadvantage when work:
1, in the operating circuit of high frequency electric knife power generator, the proper site that must be close to patient body in order to the neutral electrode of collecting and return the operation electric current, and it is enough big that itself and the contacted area of patient must reach, because neutral electrode can produce very big high frequency electric when high frequency electric knife starts, if the contact area of neutral electrode and patient body is too small, then the electric current density of contact position will increase, thus the fire victim.
2, because the current work frequency is lower, therefore the sphere of action of high frequency electric knife power generator active electrode is performed the operation and not only pathological tissues is destroyed, and the health tissues of periphery is caused unnecessary burning, thereby be unfavorable for patient's postoperative rehabilitation with regard to big and dark.
The utility model content:
Technical problem to be solved in the utility model is to avoid the existing high frequency electric knife power generator might be to the excessive and unnecessary damage of health tissues that cause of burning of causing of patient body and active electrode sphere of action at the neutral electrode place, a kind of electric wave slicing technique rate generator that can use insulating neutral electrode of antenna formula and operation sphere of action high concentration is provided, it can effectively avoid high frequency electric knife to unnecessary the burning that tissue causes, and reaches the effect of better cutting and blood coagulation.
The technical scheme in the invention for solving the technical problem is as follows:
A kind of electric wave slicing technique rate generator, it includes strength level, radio frequency buffering level, rf modulations level, modulating pulse level, radio frequency and just puts level, radio-frequency driven level, radio-frequency (RF) power amplification level and RF output; Described strength level includes 2-5MHz first-harmonic crystal, and it is in order to produce the sine wave of 2-5MHz high-amplitude vibration; Described radio frequency buffering level is connected in the outfan of strength level, and it is in order to the oscillator signal of buffering amplification from the strength level; Described modulating pulse level is in order to conversion and output square-wave modulation signal; Described rf modulations level is connected respectively with the modulating pulse level with the radio frequency buffering level, and it accepts the control from the signal of modulating pulse level, and radio frequency is carried out impulse modulation to produce the modulation system rf wave that requires; Described radio frequency is just put level and is connected in the outfan of rf modulations level, and it is in order to amplify from the rf wave signal of rf modulations level and to offer the radio-frequency driven level; Described radio-frequency driven level is just put level with radio frequency and is connected, and it provides two groups of anti-phase each other driving signals to the radio-frequency (RF) power amplification level; Described radio-frequency (RF) power amplification level is connected in the rear end of radio-frequency driven level, and its power conversion with high-voltage DC power supply is a radio-frequency power; Described RF output is connected with the radio-frequency (RF) power amplification level, and it is in order to carry out changing and shaping and to carry operation electric current and power to using electrode to rf wave.
The strength level of electric wave slicing technique rate generator described in the utility model is examined the BZ sine-wave oscillator for the Capacitance Coupled crystal-resonance; Described rf modulations level includes two N channel junction field-effect pipes and a positive-negative-positive radio-frequency (RF) switch pipe, wherein a N channel junction field-effect pipe is series in the signal circuit to be used as master switch, another N channel junction field-effect pipe also is series in the signal circuit, as with second auxiliary switch of master switch synchronization action, this positive-negative-positive radio-frequency (RF) switch pipe is parallel in the signal circuit with as first auxiliary switch; Described radio-frequency driven level is the category-A RF driver circuit that includes a low pressure radio frequency metal-oxide-semiconductor and a wide band radio-frequency transformator; The common leakage push-pull amplifier of described radio-frequency (RF) power amplification level for constituting by two high-voltage radio-frequency power MOS pipes, a balanced feeding choke coil and a wide band radio-frequency output transformer; Described RF output includes in order to reduce the humorous demodulation circuit of two LC of radio-frequency radiation and leakage.
Compare with the power generator of common high frequency electric knife, electric wave slicing technique rate generator described in the utility model has adopted one to contain the crystalline Capacitance Coupled crystal-resonance of 2-5MHz first-harmonic and examine the BZ sine wave oscillation circuit, it can produce the radio frequency sine wave of the high-amplitude vibration of 2-5MHz, the operating frequency of high frequency electric knife is brought up to more than the 2MHz, thereby constituted so-called " electric wave cutter ".Because operating current has improved radio-frequency radiation ability and radio frequency directional transmissions ability significantly, can produce better kelvin effect, so just allow to use insulating antenna, thereby avoided the too small or caused patient body of accidental release of neutral electrode contact area to burn as neutral electrode.Meanwhile, significantly improving of operating current frequency allows to use the more procedures electrode of taper, make the operation sphere of action high concentration of active electrode, the depth of penetration obviously descends, thereby the energy that eletrode tip place high-frequency high-voltage current is produced can concentrate on lesion tissue more, significantly reduces or avoids the accident of undesirable peripheral health tissues to burn.In addition, owing to mainly be to rely on the rf wave transmission of power, thus cause that conductive electric current in the electrode reduces, the procedures electrode temperature descends, thus be particularly conducive to the Minimally Invasive Surgery and the delicate procedure of increasingly extensive application; Simultaneously because operation electric current and power concentration, cut that with fixed attention effect is better, adopt electric wave cutter of the present utility model not only can carry out any electrosurgery that common high frequency electric knife can be implemented, and can also carry out common high frequency electric knife incompetent cutting, blood coagulation operation to high impedance tissues such as skin, muscle tendon, ligaments.
Description of drawings:
Fig. 1 is a functional-block diagram of the present utility model.
Fig. 2 is a circuit theory sketch map of the present utility model.
The specific embodiment:
The utility model is described in further detail below in conjunction with specific embodiments and the drawings.
At first see also Fig. 1 functional-block diagram of the present utility model, described electric wave slicing technique rate generator includes strength level 1, radio frequency buffering level 2, rf modulations level 3, modulating pulse level 4, radio frequency and just puts level 5, radio-frequency driven level 6, radio-frequency (RF) power amplification level 7 and RF output 8.
See also Fig. 2 circuit theory sketch map of the present utility model again.Described strength level 1 is that a Capacitance Coupled crystal-resonance is examined the BZ sine-wave oscillator, and in order to produce the sine wave of 2-5MHz high-amplitude vibration, in the embodiment shown in Figure 2, it is by strength pipe Q
1And the peripheral devices formation, remove strength pipe Q
1In addition, it also includes first-harmonic crystal Y
1, resistance R
1, R
2, R
3And capacitor C
1, C
2Y
1Be 2-5MHz first-harmonic crystal, make resonator, filter usefulness, can be in order to produce the sine wave of 2-5MHz high-amplitude vibration; Q
1Be the strength pipe, double as amplifies to be used; Resistance R
1, R
2, R
3Be strength pipe Q
1The quiescent biasing device, make strength pipe Q
1Be offset under low-tension supply voltage midpoint and the big current amplitude; Capacitor C
1, C
2Be the dividing potential drop coupling capacitance, both made feedback oscillation usefulness, again may command vibration output amplitude.Described strength level 1 also can be other high-quality sine-wave oscillator that can produce the vibration of 2-5MHz high-amplitude.
Described radio frequency buffering level 2 is connected in the outfan of strength level 1, and it is by radio frequency crystals audion Q
2And resistance R
4Constitute radio frequency crystals audion Q
2Quiescent biasing by strength pipe Q
1Biasing circuit and resistance R
4Determine.From preceding late-class circuit and the oscillator signal that amplifies from strength level 1, its main purpose is to increase load capacity to this radio frequency buffering level 2, prevents the influence of 3 pairs of radio frequency oscillator stages 1 of follow-up rf modulations level in order to buffer compartment.
Described rf modulations level 3 is connected with modulating pulse level 4 with radio frequency buffering level 2 respectively, and it accepts the control from the signal of modulating pulse level 4, and radio frequency is carried out impulse modulation to produce the modulation system rf wave that requires.This rf modulations level 3 includes three transistors: two N channel junction field-effect pipe Q
3, Q
5With a positive-negative-positive radio-frequency (RF) switch pipe Q
4, they constitute one with related resistors, diode and exchange radio-frequency (RF) switch, under the effect of the positive and negative modulated pwm signal D that modulating pulse level 4 is sent here, radio frequency are carried out impulse modulation to produce the modulation system rf wave of the required different mode of electric wave cutter work.Wherein, N channel junction field-effect pipe Q
3Be series in the signal circuit, as the master switch that turn-offs and connect radiofrequency signal; Positive-negative-positive radio-frequency (RF) switch pipe Q
4Be parallel in the signal circuit with as first auxiliary switch, it is with N channel junction field-effect pipe Q
3Leakage during shutoff (remaining) signal ground, thus output signal is in level "0" when guaranteeing that radio frequency turn-offs; Another N channel junction field-effect pipe Q
5Also be series in the signal circuit with as second auxiliary switch, itself and master switch synchronization action make positive-negative-positive radio-frequency (RF) switch pipe Q
4Moment just puts level 5 to follow-up radio frequency and the shock effect of radio-frequency driven level 6 drops to minimum level being switched on or switched off over the ground.
Described modulating pulse level 4 is a kind of square wave level shifting circuits, and it is a custom circuit, does not have much differences with common high frequency electric knife, so expression is not arranged in Fig. 2.This modulating pulse level 4 is in order to conversion and output square-wave modulation signal, tens to hundreds of KHz the forward square wave (being generally 12V) that it produces the single power supply CMOS square-wave oscillator circuit is converted to the square-wave modulation signal D of low-tension supply ± Ec, then input radio frequency modulating stage 3 and to enforcement control, produce desired waveform.
Described radio frequency is just put the outfan that level 5 is connected in rf modulations level 3, and it is in order to amplify from the rf wave signal of rf modulations level 3 and to offer radio-frequency driven level 6, and it is pre-amplification circuits of radio-frequency driven level 6 that this radio frequency is just put level 5, radio frequency crystals audion Q
6It is its main devices.
Described radio-frequency driven level 6 is just put level 5 with radio frequency and is connected, and it is actually and includes a low pressure radio frequency metal-oxide-semiconductor Q
7With a wide band radio-frequency transformator T
1Single tube category-A RF driver circuit.In this circuit, as the Q of driving tube
7Being offset to the category-A duty, is pure sine wave to guarantee that its output drives main waveform, potentiometer W
1And resistance R
9, R
10, R
11Constitute this radio-frequency driven level 6 and higher level's radio frequency and just put the public biasing circuit of level 5; Capacitor C
5, C
6, C
7With inductance L
1Constitute power filter (constant current) circuit of this radio-frequency driven level 6, capacitor C
8Be that spike absorbs and resonant capacitance; Wide band radio-frequency transformator T
1Be driving transformer, it must make the output impedance of radio-frequency driven level 6 and the input impedance of radio-frequency (RF) power amplification level 7 be complementary, to obtain enough driving amplitude and power, the modulated radiofrequency signal of its energy high efficiency of transmission, two (a pair of) pay two groups of opposite sinusoidal drive signals of limit polarization (peak value reaches ± 20V), dispensing is as the Q of power tube
8And Q
9, to provide two groups of anti-phase each other driving signals to radio-frequency (RF) power amplification level 7.
Described radio-frequency (RF) power amplification level 7 is connected in the rear end of radio-frequency driven level 6, is radio-frequency power with the power conversion of high-voltage DC power supply E, and it uses two high-voltage radio-frequency power MOS pipe Q
8And Q
9, a balanced feeding choke coil L
2And wide band radio-frequency output transformer T
2Formation source electrode output C class is leaked altogether and is recommended radio-frequency power amplifier.In this power amplifier, two high-voltage radio-frequency power MOS pipe Q
8And Q
9Be arranged to common drain structure (source electrode output), it is installed on same the radiator, to avoid extra insulating requirements; This balanced feeding choke coil L
2Have dual function, the one, make high voltage power supply E balancedly to two high-voltage radio-frequency power MOS pipe Q
8And Q
9Power supply, the 2nd, with these two high-voltage radio-frequency power MOS pipe Q
8And Q
9Output voltage (peak value) double, make wide band radio-frequency output transformer T
2No-load voltage ratio reduce and be easy to impedance matching (because of electric wave cutter rated load impedance higher); This wide band radio-frequency output transformer T
2Output rf power signal that can high efficiency of transmission radio-frequency (RF) power amplification level 7 can make electric wave cutter load impedance and 7 output impedance of radio-frequency (RF) power amplification level accurately be complementary again.Among Fig. 2, resistance R
12, R
13Be used to control self-oscillation, two groups of capacitance-resistance R
14, C
9And R
15, C
10Constitute two-supremes injection power MOS pipe Q frequently respectively
8And Q
9Spike absorb circuit, prevent burr voltage breakdown high-voltage radio-frequency power MOS pipe Q
8And Q
9This radio-frequency (RF) power amplification level 7 will be through choke coil L
3, capacitor C
11, C
12, C
13, C
14, C
15The power conversion of the dc source E that sends here after the filtering is the electric wave cutter radio-frequency power of the above 2-5MHz of 150W.
Described RF output 8 is connected with radio-frequency (RF) power amplification level 7, and it is in order to carry out changing and shaping and to carry operation electric current and power to using electrode to rf wave.This RF output 8 is by L
4, C
16And L
5, C
17Humorous demodulation circuit of two LC and neutral electrode coupling isolation capacitance C
18, C
19Constitute, they make pureization of sinusoidal wave form of output, reduce high frequency radiation and leakage, partition low-frequency component to guarantee safety; Neutral electrode coupling isolation capacitance C
18, C
19Carry out preceding ground connection, constituted the BF type output loop that meets electric knife safety requirements national standard.A is a procedures electrode among Fig. 2, and P1, P2 are neutral electrode two contacts, and they constitute the application electrode of electric wave cutter, and this RF output 8 carries out rf wave to carry operation electric current and power to this application electrode behind the changing and shaping.
Now the operation principle with electric wave slicing technique rate generator described in the utility model is summarized as follows: energising back strength level 1 produces the 2-5MHz radio frequency sine wave of vibration by a relatively large margin, sends into rf modulations level 3 after radio frequency buffering level 2 bufferings are amplified; This rf modulations level 3 produces the modulation system rf wave that requires under the control of the positive negative pulse stuffing signal D that modulating pulse level 4 is sent here, after radio frequency is just put level 5 amplifications, offer radio-frequency driven level 6; Radio-frequency driven level 6 provides two groups of anti-phase each other sinusoidal drive signals to radio-frequency (RF) power amplification level 7, and the dc energy of high-voltage DC power supply E is converted to radio-frequency power, delivers to behind RF output 8 changing and shapings and uses the electrode use that operates.In addition, output control of the present utility model can realize by the adjustment of high voltage power supply E and the setting of the amplitude of driving.
Because this utility model has adopted the Capacitance Coupled crystal-resonance that can produce 2-5MHz high-amplitude vibration radio frequency sine wave to examine the BZ sine wave oscillation circuit, the operating frequency of high frequency electric knife is brought up to more than the 2MHz, thereby radio-frequency radiation ability and radio frequency directional transmissions ability have been improved significantly, so allow to use insulating antenna as neutral electrode, it is external that it can be placed in the patient across operation dress, thereby avoided patient's body to burn.Meanwhile, high frequency electric makes the operation sphere of action high concentration of electrode in lesion tissue, reduces effectively or has avoided the accident of peripheral health tissues to burn.Therefore, adopt electric wave cutter of the present utility model to be particularly conducive to Minimally Invasive Surgery and delicate procedure, be particularly useful for common high frequency electric knife institute incompetent to high impedance tissues such as skin, muscle tendon, ligament cut, blood coagulation performs the operation.
Claims (6)
1. electric wave slicing technique rate generator is characterized in that: it includes strength level (1), radio frequency buffering level (2), rf modulations level (3), modulating pulse level (4), radio frequency and just puts level (5), a radio-frequency driven level (6), radio-frequency (RF) power amplification level (7) and RF output (8); Described strength level (1) includes 2-5MHz first-harmonic crystal, and it is in order to produce the sine wave of 2-5MHz high-amplitude vibration; Described radio frequency buffering level (2) is connected in the outfan of strength level (1), and it is in order to the oscillator signal of buffering amplification from strength level (1); Described modulating pulse level (4) is in order to conversion and output square-wave modulation signal; Described rf modulations level (3) is connected respectively with modulating pulse level (4) with radio frequency buffering level (2), and it accepts the control from the signal of modulating pulse level (4), and radio frequency is carried out impulse modulation to produce the modulation system rf wave that requires; Described radio frequency is just put level (5) and is connected in the outfan of rf modulations level (3), and it is in order to amplify from the rf wave signal of rf modulations level (3) and to offer radio-frequency driven level (6); Described radio-frequency driven level (6) is just put level (5) with radio frequency and is connected, and it provides two groups of anti-phase each other driving signals to radio-frequency (RF) power amplification level (7); Described radio-frequency (RF) power amplification level (7) is connected in the rear end of radio-frequency driven level (6), and its power conversion with high-voltage DC power supply is a radio-frequency power; Described RF output (8) is connected with radio-frequency (RF) power amplification level (7), and it is in order to carry out changing and shaping and to carry operation electric current and power to using electrode to rf wave.
2. electric wave slicing technique rate generator according to claim 1, it is characterized in that: described strength level (1) is examined the BZ sine-wave oscillator for the Capacitance Coupled crystal-resonance.
3. electric wave slicing technique rate generator according to claim 1 and 2, it is characterized in that: described rf modulations level (3) includes two N channel junction field-effect pipes and a positive-negative-positive radio-frequency (RF) switch pipe, wherein a N channel junction field-effect pipe is series in the signal circuit to be used as master switch, another N channel junction field-effect pipe also is series in the signal circuit, as with second auxiliary switch of master switch synchronization action, this positive-negative-positive radio-frequency (RF) switch pipe is parallel in the signal circuit with as first auxiliary switch.
4. electric wave slicing technique rate generator according to claim 1 and 2 is characterized in that: described radio-frequency driven level (6) is for including the category-A RF driver circuit of a low pressure radio frequency metal-oxide-semiconductor and a wide band radio-frequency transformator.
5. electric wave slicing technique rate generator according to claim 1 and 2 is characterized in that: the common leakage push-pull amplifier of described radio-frequency (RF) power amplification level (7) for being made of two high-voltage radio-frequency power MOS pipes, a balanced feeding choke coil and a wide band radio-frequency output transformer.
6. electric wave slicing technique rate generator according to claim 1 and 2 is characterized in that: described RF output (8) includes in order to reduce the humorous demodulation circuit of two LC of radio-frequency radiation and leakage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200699651U CN201046159Y (en) | 2007-05-18 | 2007-05-18 | Electric wave knife power generators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200699651U CN201046159Y (en) | 2007-05-18 | 2007-05-18 | Electric wave knife power generators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201046159Y true CN201046159Y (en) | 2008-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200699651U Expired - Fee Related CN201046159Y (en) | 2007-05-18 | 2007-05-18 | Electric wave knife power generators |
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| CN (1) | CN201046159Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103260539A (en) * | 2011-02-10 | 2013-08-21 | 奥林巴斯医疗株式会社 | High frequency surgical device and surgical device |
| CN103800070A (en) * | 2012-11-08 | 2014-05-21 | 佳乐医疗设备有限公司 | Electrosurgical generator |
| CN105107087A (en) * | 2015-08-26 | 2015-12-02 | 魏红月 | Electric wave therapeutic instrument |
| CN112953246A (en) * | 2021-02-23 | 2021-06-11 | 哈尔滨工业大学（深圳） | High-frequency power source system and load driving system |
| CN114533254A (en) * | 2022-04-26 | 2022-05-27 | 天津苏德科技发展有限公司 | Radio frequency particle energy focusing clock distribution method for radio frequency particle knife |
-
2007
- 2007-05-18 CN CNU2007200699651U patent/CN201046159Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103260539A (en) * | 2011-02-10 | 2013-08-21 | 奥林巴斯医疗株式会社 | High frequency surgical device and surgical device |
| CN103800070A (en) * | 2012-11-08 | 2014-05-21 | 佳乐医疗设备有限公司 | Electrosurgical generator |
| CN105107087A (en) * | 2015-08-26 | 2015-12-02 | 魏红月 | Electric wave therapeutic instrument |
| CN112953246A (en) * | 2021-02-23 | 2021-06-11 | 哈尔滨工业大学（深圳） | High-frequency power source system and load driving system |
| CN112953246B (en) * | 2021-02-23 | 2023-03-07 | 哈尔滨工业大学（深圳） | High-frequency power source system and load driving system |
| CN114533254A (en) * | 2022-04-26 | 2022-05-27 | 天津苏德科技发展有限公司 | Radio frequency particle energy focusing clock distribution method for radio frequency particle knife |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080416 Termination date: 20150518 |
|
| EXPY | Termination of patent right or utility model |