CN103536356B - There is the guiding catheter of anti-electromagnetic interference function - Google Patents
There is the guiding catheter of anti-electromagnetic interference function Download PDFInfo
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- CN103536356B CN103536356B CN201310522732.2A CN201310522732A CN103536356B CN 103536356 B CN103536356 B CN 103536356B CN 201310522732 A CN201310522732 A CN 201310522732A CN 103536356 B CN103536356 B CN 103536356B
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- guiding catheter
- gauze screen
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Abstract
The invention discloses a kind of guiding catheter with anti-electromagnetic interference function, comprise columniform hollow body, the ports having of body front end, body distal end is provided with remote interface, and wherein, body and remote interface comprise the gauze screen woven by conductive material, conductive material lays the closed ring shielding net of formation one along the tube wall intersection of body, further, gauze screen is drawn at remote interface place and is formed joint, and joint is by different modes ground connection.Guiding catheter provided by the present invention, by arranging gauze screen in body, plays electromagnetic shielding action to the ablation catheter of inside, reduces or eliminates the interference of environmental electromagnetic wave to ablation catheter.When being applied in heart and arteriorenal ablative surgery by this guiding catheter, ambient electromagnetic field can be resisted on the impact of melting catheter monitoring signal, improving the accuracy and sensitivity of measuring electricity physiological signal.
Description
Technical field
The present invention relates to a kind of guiding catheter, more specifically relate to a kind of guiding catheter with anti-electromagnetic interference function, belong to technical field of medical instruments.
Background technology
In radio-frequency ablation procedure, particularly in the operation of renal artery nerve ablation and heart electrocardio ablative surgery, and ganglioside GM_3 perform the operation in all need in the preoperative, in art and the postoperative tissue to heart or renal artery zone of ablation, and nervous tissue carries out electrophysiologic monitoring.
Because electricity physiological signal is all very faint, difference is also very trickle, if be subject to the interference of environment of electric field field signal, detecting instrument can be caused cannot to monitor out these trickle change and fluctuations, therefore, the capacity of resisting disturbance of monitoring system is the accurate and responsive important guarantee of monitoring result.
When carrying out heart and the operation of renal artery nerve ablation, owing to performing the operation, required ablation catheter is long, during work, ablation catheter must enter in heart or renal artery along vascular access from external, and the circuit carrying out monitoring is also long, and the degree be therefore disturbed is also further obvious.
Generally, by designing gauze screen on the outer wall of ablation catheter, reduce environmental electromagnetic wave to the interference detecting electricity physiological signal.But this way can increase the overall dimensions of ablation catheter, the enlarged meeting of ablation catheter external diameter increases the damage of patient, and cannot implement ablative surgery for the patient that blood vessel is less.
Need to set up from external to heart or arteriorenal passage under the assistance of guiding catheter during ablation catheter work, and the major part of ablation catheter is retained in guiding catheter inside, namely, in ablation, guiding catheter surrounds on the outer wall of ablation catheter, therefore, if a kind of guiding catheter with anti-electromagnetic interference function can be provided, to not only can eliminate or significantly reduce external electromagnetic waves to the interference of ablation catheter, and the external diameter of ablation catheter can be reduced, reduce the misery of patient, the accuracy for monitoring result also provides great guarantee.
Summary of the invention
Technical problem to be solved by this invention is the needs for radio-frequency ablation procedure, provides a kind of guiding catheter with anti-electromagnetic interference function.
In order to realize above-mentioned goal of the invention, the present invention adopts following technical scheme:
Have a guiding catheter for anti-electromagnetic interference function, comprise columniform hollow body, described body front end ports having, described body distal end is provided with remote interface,
Wherein, described body and described remote interface comprise the gauze screen woven by conductive material, and described conductive material lays the closed ring shielding net of formation one along the tube wall intersection of described body, and, described gauze screen is drawn at remote interface place and is formed joint, described joint ground connection.
Wherein more preferably, described gauze screen is arranged at the intermediate layer of described body, and described body is divided into conduit internal layer and catheter outer by described gauze screen; The horizontal line of described conductive material and the continuous cross winding of ordinate form the gauze screen of a ring-type in the outside of described conduit internal layer.
Wherein more preferably, described conductive material is selected from stainless steel material, niti material or carbon fiber.
Wherein more preferably, the count of described gauze screen is between 30pic ~ 200pic, and wherein, pic represents the quantity in the mesh grid cross point in per inch length.
Wherein more preferably, described joint is by the direct ground connection of lead-in wire.
Wherein more preferably, the skin electrode ground connection of described joint by being connected with described remote interface.
Wherein more preferably, described joint is connected with composite cable, and by composite cable ground connection.
Wherein more preferably, pulling bayonet joint is arranged to by described joint, and is connected with composite cable by pulling bayonet joint; Described composite cable carries out ground connection through arriving composite cable joint after joystick.
Wherein more preferably, in described remote interface, haemostatic valve is provided with.
Or, wherein more preferably, in described remote interface, haemostatic valve is not set.
Wherein more preferably, be connected with Y-valve at the far-end of described guiding catheter, the tubular body of described Y-valve is provided with the gauze screen woven by conductive material, the joint ground connection of described gauze screen by drawing.
Compared with prior art, the guiding catheter with anti-electromagnetic interference function provided by the present invention, in the body of guiding catheter, design the gauze screen of electromagnetism interference, electromagnetic shielding action is played to the ablation catheter of inside, reduce or eliminate the interference of environmental electromagnetic wave to ablation catheter.When being applied in heart and arteriorenal ablative surgery by this guiding catheter, ambient electromagnetic field can be resisted on the impact of melting catheter monitoring signal, improving the accuracy and sensitivity of measuring electricity physiological signal.Further, this guiding catheter, while effectively utilizing body, effectively reduces the size of radio frequency ablation catheter.In addition, netted shielding construction can also strengthen the intensity of guiding catheter body.
Accompanying drawing explanation
Fig. 1 is the structural representation with the guiding catheter of anti-electromagnetic interference function provided by the invention;
Fig. 2 is the cross-sectional schematic of guiding catheter shown in Fig. 1;
Fig. 3 is the schematic cross-section of guiding catheter shown in Fig. 1;
Fig. 4 is in guiding catheter shown in Fig. 1, the expansion schematic diagram of gauze screen;
Fig. 5 is the principle of electromagnetic shield-ing schematic diagram of guiding catheter shown in Fig. 1;
Fig. 6 is that in the 1st embodiment, gauze screen carries out the schematic diagram of ground connection by composite cable;
Fig. 7 is that in the 2nd embodiment, gauze screen carries out the schematic diagram of ground connection by skin electrode;
Fig. 8 is in the 3rd embodiment, and gauze screen is by the directly grounded schematic diagram of lead-in wire;
Fig. 9 is in the 4th embodiment, not containing the structural representation of the gauze screen of the guiding catheter of haemostatic valve.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
As shown in Figure 1, the guiding catheter with anti-electromagnetic interference function provided by the invention comprises columniform hollow body 3, body 3 front end ports having, the far-end of body 3 is provided with remote interface 2, and the far-end of body 3 refers to the end of body 3 away from human body, wherein, remote interface 2 is connected with three-way valve 1 by conduit 7, remote interface 2 inside is provided with haemostatic valve 8, and meanwhile, remote interface 2 is connected with skin electrode 4 by wire 6.In addition, guiding catheter is provided with the gauze screen 12 woven by conductive material in body 3 and remote interface 2, and conductive material lays the closed ring shielding net of formation one along the tube wall intersection of body 3, and, gauze screen 12 is drawn at remote interface 2 place and is formed joint 5, and joint 5 carries out ground connection.
Composition graphs 1 to Fig. 4 is known, in order to ensure the safety of guiding catheter and avoid gauze screen 12 in use to damage, gauze screen 12 is arranged to the intermediate layer of body 3, and body 3 is divided into conduit internal layer 13 and catheter outer 11 by gauze screen 12.Known see Fig. 2, gauze screen 12 is woven by conductive material and forms, and conductive material lays along the tube wall intersection of body 3 the ring shielding net 12 being formed and close.From the expanded view of the gauze screen shown in Fig. 4, gauze screen 12 launches rear horizontal line and ordinate and has a certain degree and weave, when gauze screen 12 is arranged in body 3, horizontal line is wherein oblique to be wound around around conduit internal layer 13, ordinate and horizontal line are wound around around conduit internal layer 13 in oblique in the other direction, and horizontal line and the continuous cross winding of ordinate form the gauze screen of a ring-type in the outside of conduit internal layer 13.Gauze screen is woven by conductive material and forms, and wherein, conductive material can be selected from the conductive materials such as rustless steel Steel material, niti material and carbon fiber.The count of gauze screen can be different, such as, can select between 30pic ~ 200pic, and wherein, pic represents the quantity in the mesh grid cross point in per inch length.
Principle of electromagnetic shield-ing figure shown in Figure 5, conductive material forms a closed ring shielding net along the tube wall interlacing of body 3.When electromagnetic interference 14 radiation direction guiding catheter 3, electromagnetic interference 14 arrives gauze screen 12 through catheter outer 11, only have few electromagnetic wave 15 can be absorbed through gauze screen 12, and the electromagnetic wave 16 of the overwhelming majority is all reflected, thus considerably reduce ambient electromagnetic field to the electromagnetic interference of ablation catheter being arranged in guiding catheter inside.
Above the set-up mode of gauze screen in guiding catheter 12 and shielding principle are introduced, below in conjunction with Fig. 6 to Fig. 8, the earthing mode of gauze screen 12 is illustrated.
As shown in Figure 6 to 8, it is inner that ablation catheter 24 enters guiding catheter 3 by remote interface 2, and the radio-frequency electrode 25 of ablation catheter 24 passes from the port of guiding catheter 3 front end and acts on human body; The far-end of ablation catheter 24 is connected with joystick 22; Ablation catheter 24 inside is provided with composite cable, and the front end of composite cable extends to radio-frequency electrode 25, and far-end is connected with composite cable joint 21 through joystick 22.
In guiding catheter provided by the present invention, gauze screen 12 can ground connection in different ways.Such as, in the 1st embodiment shown in Fig. 6, the joint 5 of gauze screen 12 is arranged to pulling bayonet joint 23, and is connected with composite cable by pulling bayonet joint 23; Composite cable carries out ground connection through arriving composite cable joint 21 place after joystick 22.Or in the 2nd embodiment shown in Fig. 7, gauze screen 12 can by skin electrode 4 ground connection be connected with remote interface 2, and wherein, joint 5 is connected with skin electrode 4, and skin electrode 4 carries out ground connection setting; Or in the 3rd embodiment shown in Fig. 8, the joint 5 of gauze screen 12 can by the direct ground connection of lead-in wire.
In the above embodiments, be provided with haemostatic valve 8 in the remote interface 2 of guiding catheter, but it does not get rid of the structure not arranging haemostatic valve in remote interface 2.Such as, not containing haemostatic valve guiding catheter in, the gauze screen woven by conductive material can be set equally in body 3 and remote interface 2, and, gauze screen is drawn at remote interface 2 place and is formed joint 5, joint 5 can direct ground connection as shown in Figure 9, also can by the skin electrode 4 that is connected with joint 5 or composite cable ground connection.
In three embodiments shown in Fig. 6 to Fig. 8, remote interface 2 inside of guiding catheter is provided with haemostatic valve 8, and remote interface 2 is connected with three-way valve 1 by conduit 7.In order to meet in ablative surgery, radiography, lavation, the requirements such as anticoagulant, can carry out radiography by three-way valve 1 to injection of contrast medium in the body 3 of guiding catheter, saline injection carries out lavation and inject heparin carrying out anticoagulant.
In the 4th embodiment shown in Fig. 9, remote interface 2 inside of guiding catheter does not arrange haemostatic valve, and, remote interface 2 does not have connecting tee valve yet.For the ease of carrying out radiography to injection of contrast medium in the body 3 of guiding catheter, saline injection carries out lavation and injection heparin carries out anticoagulant, Y-valve 9 can be connected at remote interface 2 place of guiding catheter, Y-valve 9 can be spirally connected with remote interface 3, realizes sealing effectiveness.Meanwhile, in order to ensure the anti-electromagnetic interference function of guiding catheter, be also provided with the gauze screen 30 woven by conductive material at the tubular body of Y-valve 9, the joint ground connection of gauze screen 30 by drawing.
In sum, the guiding catheter with anti-electromagnetic interference function provided by the invention, designs the gauze screen of electromagnetism interference in body, plays electromagnetic shielding action to the ablation catheter of inside, reduces or eliminates the interference of environmental electromagnetic wave to ablation catheter.When being applied in heart and arteriorenal ablative surgery by this guiding catheter, ambient electromagnetic field can be resisted on the impact of melting catheter monitoring signal, improving the accuracy and sensitivity of measuring electricity physiological signal.Further, this guiding catheter, while effectively utilizing body, reduces the size of radio frequency ablation catheter, and netted gauze screen structure can also strengthen the intensity of guiding catheter body.
Above the guiding catheter with anti-electromagnetic interference function provided by the present invention is described in detail.To those skilled in the art, to any apparent change that it does under the prerequisite not deviating from connotation of the present invention, all by formation to infringement of patent right of the present invention, corresponding legal responsibility will be born.
Claims (5)
1. have a guiding catheter for anti-electromagnetic interference function, comprise columniform hollow body, described body front end ports having, described body distal end is provided with remote interface, it is characterized in that:
Described body and remote interface comprise the gauze screen woven by conductive material, and described conductive material lays the closed ring shielding net of formation one along the tube wall intermediate layer intersection of described body, and described gauze screen is drawn at remote interface place and formed joint; Wherein,
Pulling bayonet joint is arranged to by described joint, and is connected with composite cable by pulling bayonet joint; Described composite cable arrives composite cable joint ground connection through after joystick.
2. guiding catheter as claimed in claim 1, is characterized in that:
Described conductive material is selected from stainless steel material, niti material or carbon fiber.
3. guiding catheter as claimed in claim 1, is characterized in that:
The count of described gauze screen is between 30pic ~ 200pic, and wherein, pic represents the quantity in the mesh grid cross point in per inch length.
4. guiding catheter as claimed in claim 1, is characterized in that:
Haemostatic valve is provided with in described remote interface.
5. guiding catheter as claimed in claim 1, is characterized in that:
Be connected with Y-valve at the far-end of described guiding catheter, the tubular body of described Y-valve is provided with the gauze screen woven by conductive material, the joint ground connection of described gauze screen by drawing.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310522732.2A CN103536356B (en) | 2013-10-29 | 2013-10-29 | There is the guiding catheter of anti-electromagnetic interference function |
| EP14748628.6A EP2954865B1 (en) | 2013-02-07 | 2014-02-07 | Radio frequency ablation method, system and radio frequency ablation device thereof |
| US14/766,637 US9993291B2 (en) | 2013-02-07 | 2014-02-07 | Radio frequency ablation method, system and radio frequency ablation device thereof |
| CN201490000298.XU CN205215353U (en) | 2013-02-07 | 2014-02-07 | Radio frequency melts system and radio frequency melts equipment thereof |
| JP2015556380A JP6453769B2 (en) | 2013-02-07 | 2014-02-07 | Induction cauterization method, system and induction cautery equipment |
| PCT/CN2014/000143 WO2014121664A1 (en) | 2013-02-07 | 2014-02-07 | Radio frequency ablation method, system and radio frequency ablation device thereof |
| MYPI2015702559A MY179432A (en) | 2013-02-07 | 2014-02-07 | Radio frequency ablation method, system and radio frequency ablation device thereof |
| ES14748628T ES2921176T3 (en) | 2013-02-07 | 2014-02-07 | Method, radiofrequency ablation system and radiofrequency ablation device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310522732.2A CN103536356B (en) | 2013-10-29 | 2013-10-29 | There is the guiding catheter of anti-electromagnetic interference function |
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| Publication Number | Publication Date |
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| CN103536356A CN103536356A (en) | 2014-01-29 |
| CN103536356B true CN103536356B (en) | 2016-04-20 |
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| CN201310522732.2A Active CN103536356B (en) | 2013-02-07 | 2013-10-29 | There is the guiding catheter of anti-electromagnetic interference function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108596132A (en) * | 2018-04-28 | 2018-09-28 | 上海微创电生理医疗科技股份有限公司 | Ablation stove evaluation method and system |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2954865B1 (en) | 2013-02-07 | 2022-04-06 | Shanghai Golden Leaf Med Tec Co., Ltd | Radio frequency ablation method, system and radio frequency ablation device thereof |
| US9320447B2 (en) * | 2014-02-07 | 2016-04-26 | Biosense Webster (Israel) Ltd. | Dynamic cancellation of MRI sequencing noise appearing in an ECG signal |
| US9801585B2 (en) * | 2014-12-31 | 2017-10-31 | Biosense Webster (Israel) Ltd. | Electrocardiogram noise reduction |
| US10507317B2 (en) * | 2015-12-31 | 2019-12-17 | St Jude Medical International Holding S.À R.L. | Connector shield for sensor enabled medical devices |
| CN106730245A (en) * | 2017-01-11 | 2017-05-31 | 心诺普医疗技术（北京）有限公司 | A kind of medical tube and its preparation technology and the sheath using the body |
| CN107822708A (en) * | 2017-11-30 | 2018-03-23 | 中国科学技术大学 | A kind of radio frequency ablation needle |
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| US8712544B2 (en) * | 2001-04-13 | 2014-04-29 | Greatbatch Ltd. | Electromagnetic shield for a passive electronic component in an active medical device implantable lead |
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