CN103211650B - Capacitive type operation electrode circuit pad - Google Patents
Capacitive type operation electrode circuit pad Download PDFInfo
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- CN103211650B CN103211650B CN201310170516.6A CN201310170516A CN103211650B CN 103211650 B CN103211650 B CN 103211650B CN 201310170516 A CN201310170516 A CN 201310170516A CN 103211650 B CN103211650 B CN 103211650B
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- type operation
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Abstract
The invention discloses a capacitive type operation electrode circuit pad. The capacitive type operation electrode circuit pad disclosed by the invention is manufactured by taking polymer gel as an insulating medium and pouring the polymer gel on two surfaces of conductive fabric of a capacitance plate. In order to solve the condition that the capacitance plate and the insulating medium are in drum stratification, a plurality of rectangular array circular holes are machined in the capacitance plate as required in the capacitive type operation electrode circuit pad disclosed by the invention; the poured polymer gel is used for integrally connecting the gel on two surfaces of the capacitance plate via the circular holes in the capacitance plate; and the capacitance plate is fixed among gel layers, so that the insulating medium on two surfaces of the capacitance plate are not separated from the capacitance plate. A high-frequency electric knife has two circuit negative plate detecting modes; and in order to enable the capacitive type operation electrode circuit pad disclosed by the invention to be suitable for the two detecting modes, a group of RC (Resistor Capacitor) circuits are added between two circuit lead wires in the capacitive type operation electrode circuit pad disclosed by the invention, so that an effect after pasting one-time bipolar negative plate on a human body is imitated, the circuit pad can pass the detection of the bipolar circuit detecting mode of the electric knife and the normal use of the operation electrode circuit pad is guaranteed.
Description
Technical field
The invention belongs to field of medical device, specifically relate to a kind of capacitive type operation electrode circuit pad.
Background technology
At present, known high-frequency surgery electric knife is when carrying out operation technique to patient, by the scalpel with wire, by the high frequency electric that high frequency generator in high frequency electric knife produces, a high frequency electric loop is formed, to be used for carrying out surgical cut and solidified structure via patient body and the negative plate be fixed on patient body.In most application, high frequency electric through patient, then is returned the high frequency generator of high frequency electric knife by active wires and electrode (scalpel) by the negative plate be fixed on patient body and wire thereof.Usually fix negative plate employing at patient body and be deposited with mode, and the position be applicable to needing chosen distance operative site nearer, also to ensure that negative plate and patient skin will have relative large contact area, to provide the passage of Low ESR and low current density simultaneously.But in practical operation, the restriction selected due to fixed position contacts loosely with negative plate, produce many reasons such as hollow causes contact area to reduce, contact site electric current density is increased and produces high heat, therefore, time have patient skin to be occurred by the malpractice of burning.In addition when performing the operation to burn patients, a selection more scabrous problem especially of process and fixed position fixed by negative plate.According to above existing problems, occur adopting contactless Capacitance Coupled principle, power conduction is carried out to high frequency electric knife radio frequency that high frequency generator produces (RF) power, form high-frequency current path, to carry out operation technique to patient, can effectively improve the generation of patient's electric injury malpractice and the difficulty to fixed position selection
With reference to the patent No. 200480034536 (Megadyne Medical Products, Inc. of the U.S.), and the patent No. 200720173812.1 (operation electrode loop pad) summary of the invention, be the negative plate product utilizing Capacitance Coupled principle to make, and have certain effect in operation application.But in use still there is certain problem in actual product, and Shi Erhui produces certain electric injury infringement and the change of electrotomy duty to patient, its reason is be encapsulated in by capacitor plate in the middle of two-layer dielectric as the material of dielectric, because the area of capacitor plate and dielectric is suitable, therefore dielectric is divided into two panels completely, edge is only had to be combined as a whole, and this product all needs to make of very soft material, in use there will be and constantly rub pressure, the situation such as folding, dielectric and capacitor plate can be caused to produce from drum, lamination, therefore the instability of capacitance is caused, both the change of overall high-frequency current path impedance had been caused.
Should know those skilled in the art: to electrotomy, electric knife is must be very little with the active electrode (electric knife head) at contact patients point place, the surgical effect with the high current density of coagulating tissue can be cut to produce, transmit with the refurn electrode (negative plate) of active electrode (electric knife head) same current should be enough large with the effective area at patient's connectivity points place, thus the density flowing to the electrosurgical electric current of refurn electrode (negative plate) from patient is limited to level of security, if the density of electrosurgical electric current is higher at refurn electrode place, then the temperature of patient skin tissue will raise in this region, unnecessary electric injury can be caused.And in noncontact negative plate product, impedance in loop is mainly determined by the capacitive reactance of electric capacity, therefore due to reason that capacitor plate is separated with dielectric, capacitance can be caused to reduce, and namely capacitive reactance is increased, and causes high-frequency current path total impedance to increase, then can produce the hydraulic performance decline of electric knife cutting and coagulating tissue, so that normally cannot work, even if high frequency electric knife has the function detecting curent change, but still greatly can affect surgical effect.
Summary of the invention
The technical solution used in the present invention is: capacitive type operation electrode circuit pad high-molecular gel is as dielectric, make at the metallic conduction cloth two sides cast gel formats as capacitor plate, for solution capacitor plate and dielectric are from drum delamination, the present invention adopts on capacitor plate, adds number row rectangular array circular hole on request, the high-molecular gel of cast is then connected as one by the gel of the circular hole on capacitor plate by capacitor plate two sides, capacitor plate is fixed between gel layer, and effectively can ensure that the dielectric on capacitor plate two sides can not be separated with capacitor plate.
For ensureing that high frequency electric knife normally works, must ensure that capacitor plate and human body have certain induction area (both human body and pole plate are formed electric capacity), therefore capacitor plate also needs enough large area, to make human body in various operation position, the low impedance path that high frequency surgery electric current returns electrosurgical high frequency generator can be met.The area of general operation electrode loop pad product capacitor plate is
44cm*114cm＝5016cm
2
By well-known electrical general knowledge, capacitance C computing formula is:
ε in formula
r-insulant relative dielectric constant (high-molecular gel dielectric constant)
ε
0-dielectric constant of air
S-capacitor plate area
D-capacitor plate spacing (between human body and capacitor plate gel layer thicknesses)
In the present invention, other parameter does not become, because being added with circular hole on capacitor plate, polar plate area is only had to reduce, as long as therefore compare the change (i.e. the change of capacitance) of the rear polar plate area with improvement compared with before-improvement, can verify whether the operation electrode loop pad after improvement has impact to serviceability, the present embodiment capacitor plate circular hole quantity is 9, aperture be Φ 1.2cm circular hole subduction area be
3.14*0.6
2*9＝10.17cm
2
Pole plate real area after improvement is
5016cm
2-10.17cm
2＝5005.83cm
2
Area change percentage ratio is
5005.83/5016＝0.997972％
Area reduces to reduce completely negligible less than 0.01% less than 0.01% that is capacitance, bulk loop impedance is not affected, but this improvement solves the separation problem of capacitor plate and dielectric really, ensure that the job stability of operation electrode loop pad and high-frequency surgery electric knife.
Further improvement: high frequency electric knife all has loop negative plate measuring ability, usual high frequency electric knife has two kinds of loop negative plate detecting patterns, i.e. single loop negative plate detecting pattern and double loop negative plate detecting pattern.By original operation electrode loop pad circuit structure, be only applicable to the single loop negative plate detecting pattern of high frequency electric knife, when high frequency electric knife is in double loop negative plate detecting pattern, the double loop detecting pattern of electric knife there will be loop and reports to the police, now electric knife inactivity exports, and cannot work.
For head it off the technical solution used in the present invention is: capacitor plate lead-out wire is designed to be applicable to the single loop negative plate detecting pattern of high frequency electric knife and two wires of double loop negative plate detecting pattern respectively, two wires all add connecting pin, the wire centre being applicable to double loop negative plate detecting pattern wherein adds one group of RC circuit, be connected between return wire by after resistance and Capacitance parallel connection, and adopt Plastic Package to be injection-moulded on wire by RC circuit.The numerical value of resistance and electric capacity derives from the mensuration bipolar negative plate being attached to the resistance after human body and capacitance.Imitate disposable bipolar negative pole plate with this and be pasted onto the effect after human body.Capacitor plate lead-out wire is adapted as the gang socket that can dock with two wire connecting pins respectively, can as required by changing-over be suitable for wire, enable the single loop detecting pattern of return pads by electric knife and the detection of double loop detecting pattern, ensure that the normal use of operation electrode loop pad.
The advantage that the present invention has and beneficial effect are: the separation problem really solving capacitor plate and dielectric, ensure that the job stability of operation electrode loop pad and high-frequency surgery electric knife.By the improvement to circuit structure, capacitive type operation electrode circuit pad can be made to be applicable to single loop negative plate detecting pattern and double loop negative plate detecting pattern simultaneously.
Accompanying drawing explanation
Fig. 1 is schematic diagram before improving;
In figure: 1. dielectric 2. capacitor plate 3. capacitor plate and dielectric separation case
Fig. 2 is schematic diagram after improving;
In figure: 4. connected as one by capacitor plate circular hole two sides dielectric
Fig. 3 capacitive type operation electrode circuit pad schematic perspective view
In figure: 5. capacitor plate circular hole 6. capacitor plate lead-out wire 7. capacitor plate lead-out wire socket
Fig. 4 single, double loop connecting line uses schematic diagram
In figure: 8. single loop cable plug 9. double loop cable plug 10.RC Resistor-Capacitor Unit packaging body 11. high frequency electric knife connecting pin
Fig. 5 RC Resistor-Capacitor Unit circuit diagram
Detailed description of the invention
The present invention relates to a kind of capacitive type operation electrode circuit pad, by solve capacitor plate to be separated with dielectric the change of generation capacitance, have employed at capacitor plate punch pattern, dielectric is made to be connected as one by punching and can reliably ensure that dielectric is no longer separated with capacitor plate in two sides, detailed description of the invention is the one side cast high-molecular gel at capacitor plate, arrival needs to pour into a mould high-molecular gel at capacitor plate another side again during thickness, because now high-molecular gel is still in thick liquid nano, therefore be integrated by two sides is molten by capacitor plate punching, can according to actual needs at capacitor plate length direction upper punch 4-5 round, it is punching 3 round in the present embodiment.
Another modified embodiment is that capacitor plate lead-out wire is increased by a multi-tap, return wire changes two into, a wire increases RC Resistor-Capacitor Unit wherein, and appearance Plastic Package and wire are injected into one, in order to simulated dual loop electrode Detection results, make capacitive type operation electrode circuit pad can be common to single loop negative plate detecting pattern and the double loop negative plate detecting pattern of high frequency electric knife.Concrete using method is when high-frequency surgery electric knife is single loop negative plate detecting pattern, use single loop connecting line, inserted by single loop cable plug 8 in capacitor plate lead-out wire socket 7, high frequency electric knife connecting pin 11 is directly connected can normally uses with high frequency electric knife socket.When high-frequency surgery electric knife is double loop negative plate detecting pattern, then uses double loop connecting line, double loop cable plug 9 is inserted in capacitor plate lead-out wire socket 7 and can normally use.
Above two kinds of embodiments of invention have been described in detail, but described content is only preferred embodiment of the present invention, can not be considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (4)
1. a capacitive type operation electrode circuit pad, by high-molecular gel as dielectric, metallic conduction cloth is as capacitor plate, and capacitor plate lead-out wire is designed to be applicable to the single loop negative plate detecting pattern of high frequency electric knife and two wires of double loop negative plate detecting pattern respectively, it is characterized in that: on capacitor plate, have number to arrange the circular hole preventing capacitor plate to be separated with dielectric by rectangular array punching, high-molecular gel is connected as one by the gel of the circular hole on capacitor plate by capacitor plate two sides, capacitor plate is fixed between gel layer, and rush that circular hole area is no more than whole capacitor plate area 0.01%, be applicable to be in series with RC resistance-capacitance circuit in the wire of double loop negative plate detecting pattern, described RC resistance-capacitance circuit be by be connected on double loop negative plate detecting pattern after electric capacity and resistor coupled in parallel wire between, described resistance and the numerical value of electric capacity derive from the mensuration bipolar negative plate being attached to the resistance value after human body and capacitance.
2. a kind of capacitive type operation electrode circuit pad according to claim 1, is characterized in that: described capacitor plate lead-out wire has installed gang socket additional at exit.
3. a kind of capacitive type operation electrode circuit pad according to claim 2, it is characterized in that: the described single loop negative plate detecting pattern being applicable to high frequency electric knife respectively and two wires of double loop negative plate detecting pattern, its two wires all add connecting pin, can be connected with described capacitor plate lead-out wire gang socket respectively.
4. a kind of capacitive type operation electrode circuit pad according to claim 1, is characterized in that: be applicable to the RC resistance-capacitance circuit of connecting in the wire of double loop negative plate detecting pattern, is to adopt Plastic Package injection moulding to be fixed on return wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310170516.6A CN103211650B (en) | 2013-05-10 | 2013-05-10 | Capacitive type operation electrode circuit pad |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310170516.6A CN103211650B (en) | 2013-05-10 | 2013-05-10 | Capacitive type operation electrode circuit pad |
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| CN103211650A CN103211650A (en) | 2013-07-24 |
| CN103211650B true CN103211650B (en) | 2015-03-11 |
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| CN201310170516.6A Active CN103211650B (en) | 2013-05-10 | 2013-05-10 | Capacitive type operation electrode circuit pad |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106420046A (en) * | 2016-09-30 | 2017-02-22 | 北京迈迪顶峰医疗科技有限公司 | Integral electrode |
| CN107456275A (en) * | 2017-08-25 | 2017-12-12 | 奥克兰高分子医用材料(天津)有限公司 | Novel operation electrode loop pad and preparation method thereof |
| CN107669336A (en) * | 2017-09-30 | 2018-02-09 | 奥克兰高分子医用材料(天津)有限公司 | Children and the universal operation electrode loop pad of adult |
| CN113786236A (en) * | 2021-09-16 | 2021-12-14 | 奥克兰高分子医用材料(天津)有限公司 | Liquid leakage prevention high-frequency negative pole loop pad |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1105565A (en) * | 1978-09-12 | 1981-07-21 | Kaufman (John G.) Hospital Products Ltd. | Electrosurgical electrode |
| FR2516782B1 (en) * | 1981-11-20 | 1985-09-27 | Alm | HIGH FREQUENCY CURRENT ELECTRO-SURGICAL APPARATUS AND METHOD OF IMPLEMENTING |
| US6454764B1 (en) * | 1996-10-30 | 2002-09-24 | Richard P. Fleenor | Self-limiting electrosurgical return electrode |
| US6544258B2 (en) * | 1996-10-30 | 2003-04-08 | Mega-Dyne Medical Products, Inc. | Pressure sore pad having self-limiting electrosurgical return electrode properties and optional heating/cooling capabilities |
| CN2624845Y (en) * | 2003-06-10 | 2004-07-14 | 李平 | Negative electrode pad for electrosurgical operation |
| US20090234352A1 (en) * | 2008-03-17 | 2009-09-17 | Tyco Healthcare Group Lp | Variable Capacitive Electrode Pad |
| US8628524B2 (en) * | 2009-04-27 | 2014-01-14 | Bovie Medical Corporation | Return electrode detection and monitoring system and method thereof |
| CN202665689U (en) * | 2012-03-16 | 2013-01-16 | 扬州市第一人民医院 | Endotherm knife output transverter |
| CN203263529U (en) * | 2013-05-10 | 2013-11-06 | 赵光华 | Capacitive type operation electrode loop pad |
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2013
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Owner name: AUCKLAND MEDICAL POLYMER (TIANJIN) CO., LTD. Free format text: FORMER OWNER: ZHAO GUANGHUA Effective date: 20150709 |
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Effective date of registration: 20150709 Address after: 300385 Tianjin Saida international industry city Xiqing economic development area Rongcheng two branch block D5-2 Patentee after: Auckland Medical Polymer (Tianjin) Co.,Ltd. Address before: 300384 Tianjin City, Nankai District Huayuan Qi Li 9-1-301 Patentee before: Zhao Guanghua |
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