CN104224311A - Intelligent medical catheter - Google Patents
Intelligent medical catheter Download PDFInfo
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- CN104224311A CN104224311A CN201410453873.8A CN201410453873A CN104224311A CN 104224311 A CN104224311 A CN 104224311A CN 201410453873 A CN201410453873 A CN 201410453873A CN 104224311 A CN104224311 A CN 104224311A
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- conduit
- electrode
- intelligent medical
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- hole
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Abstract
The invention relates to an intelligent medical catheter. The intelligent medical catheter comprises a catheter and a metal head at the end part of the catheter. More than two holes are uniformly arranged in the metal head. One electrode or a pair of electrodes are installed in each hole. An insulation layer is arranged between the electrode and the hole wall. Because more than two holes are uniformly arranged in the metal head, a pair of electrodes are installed in each hole and the insulation layer is arranged between the electrode and the hole wall, namely, each hole is an insulation region, a pair of electrodes are arranged in each insulation region, the pressure of the top end of the catheter to a vascular wall and the temperature of heated heart tissues during the melting process can be monitored.
Description
Technical field
The present invention relates to a kind of Intelligent medical conduit, belong to field of medical appliances.
Background technology
Current catheter ablation operation can treat some diseases.In catheter ablation operation process, a series of conduit will pass through from arm, and the blood vessel of belly and neck inserts, and enters heart eventually through blood vessel.The machine of connecting duct exports energy by conduit, adopts this energy among a small circle, to melt some heart tissues in the form of heat, to solve the problem of abnormal heartbeat.The ablation procedure of conduit often needs radio-frequency (RF) energy, adopts this energy to produce the hot heart tissue eliminating specific region.But in ablation procedure, heart tissue is sometimes by excessive heat; It is excessive that the top of medical catheter also may produce pressure to blood vessel wall, and pressure crosses conference injured blood vessel wall, so medical catheter needs the pressure of energy perception conduit and blood vessel wall, and by the temperature of heart tissue heated, whether the maximum temperature of the tissue therefore needing timely perception to melt oversteps the extreme limit, in order to avoid temperature is too high or pressure is excessive produce larger injury to human body.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of Intelligent medical conduit, overcome medical catheter in prior art and perception can not melt temperature in catheter ablation operation process, and the top of conduit also may produce pressure to blood vessel wall, cause defect human body being produced to larger harm.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of Intelligent medical conduit, comprise the ferrule of conduit and end of conduit, described ferrule is evenly arranged plural hole, in every hole, one or pair of electrodes has all been installed, between described electrode and hole wall, be provided with insulating barrier.
The invention has the beneficial effects as follows: the present invention owing to being evenly arranged plural hole in ferrule, in every hole, one or pair of electrodes are all installed, insulating barrier is provided with between described electrode and hole wall, i.e. each Kong Weiyi insulating regions, be equipped with one or pair of electrodes in each insulating regions, the temperature of heart tissue can be heated in the pressure of blood vessel wall and ablation procedure in monitoring tube top.
On the basis of technique scheme, the present invention can also do following improvement.
A kind of Intelligent medical conduit of the present invention described above, further, also comprise guiding-tube bend degree sensor, described at least one pair of annular electrode of guiding-tube bend degree sensor, described annular electrode is arranged on inside described conduit or outside conduit.
The beneficial effect of above-mentioned further scheme is adopted to be: owing to have employed the capacitance type sensor of a pair annular electrode composition, during guiding-tube bend, according to the change of electric capacity, can detect whether conduit bends.
A kind of Intelligent medical conduit of the present invention described above, further, also comprise guiding-tube bend degree sensor, described at least one annular electrode of guiding-tube bend degree sensor, be positioned at four arc-shaped electrodes of same plane, between described four arc-shaped electrodes and insulate between arc-shaped electrode and annular electrode, it is arranged on inside described conduit or outside conduit.
The beneficial effect of above-mentioned further scheme is adopted to be: because four arc-shaped electrodes form a capacitance sensor respectively with annular electrode, the bending direction of sensor can be judged more accurately.
A kind of Intelligent medical conduit of the present invention described above, further, described guiding-tube bend degree sensor is more than 2, and dispersion is laid in conduit and often holds flexible region.
The beneficial effect of above-mentioned further scheme is adopted to be: the bending direction that conduit can be judged according to multipair annular electrode more quickly and accurately, to ensure that conduit can arrive the position requiring operation smoothly.
A kind of Intelligent medical conduit of the present invention described above, further, also comprise conduit and vessel wall contact force transducer, described at least one pair of annular electrode of guiding-tube bend degree sensor, described annular electrode is arranged on inside described conduit or outside conduit.
The beneficial effect of above-mentioned further scheme is adopted to be: owing to have employed the capacitance type sensor of a pair annular electrode composition, during catheter contact blood vessel wall, according to the change of electric capacity, the pressure of conduit and blood vessel wall can be detected.
Accompanying drawing explanation
Fig. 1 is a kind of Intelligent medical guide-tube structure of the present invention schematic diagram;
Equivalent circuit diagram when Fig. 2 is the electrode detection in a kind of Intelligent medical conduit of the present invention in ferrule in hole;
The relation schematic diagram of AC impedance and temperature when Fig. 3 is the electrode detection in a kind of Intelligent medical conduit of the present invention in ferrule in hole;
Frequency and temperature relation schematic diagram when Fig. 4 is the electrode detection in a kind of Intelligent medical conduit of the present invention in ferrule in hole;
Fig. 5 is the structural representation of guiding-tube bend degree sensor in a kind of Intelligent medical conduit of the present invention.
In accompanying drawing, the list of parts representated by each label is as follows:
1, conduit, 2, a pair annular electrode, 3, annular electrode, 4, four arc-shaped electrodes, 5, hole in ferrule, 6, contact electrode.
Detailed description of the invention
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 1, a kind of Intelligent medical conduit, comprises the ferrule of conduit and end of conduit, and described ferrule has been evenly arranged plural hole, is all provided with one or pair of electrodes in every hole, is provided with insulating barrier between described electrode and hole wall.Electrode is arranged in hole, the surface of insulating barrier, and electrode outwards exports data by the wire in conduit.
Often pair of electrode in above-mentioned each hole or when in a hole during electrode, two electrodes in two holes can form different circuit, when electrode is connected by direct current or alternating current circuit, these electrodes just can the saline solution that contacts of perception and blood.When conduit contacts with heart tissue, compare less saline and blood are arrived by above-mentioned electrode contact.At this moment, the AC impedance between electrode and dielectric constant can be more responsive to the temperature of heart tissue.
When the AC impedance when between measurement electrode and dielectric constant, the contact force of conduit and blood vessel and the pressure of conduit on blood vessel are the factors of these two parameters of appreciable impact, every pair of electrodes, and the equivalent circuit that heart tissue, saline and blood are formed as shown in Figure 2.
As shown in Figure 2, resistance R1 and electric capacity C1 are equivalent to high-temperature area and leave and contact electrode as far as the tissue of 8 millimeters, and resistance R2 is equivalent to electric capacity C2 the tissue directly contacting catheter electrode.
Can be formed between two electrodes and much organize equivalent circuit, be example with two: when electrode does not contact blood vessel wall: the medium of C1 and C2 is exactly the saline between electrode, blood.When electrode contact blood vessel wall, the medium of C1 and C2 is exactly the blood vessel wall (when electrode contact blood vessel wall) between electrode.The vascular wall tissue in electrode area comparatively far away is left in C1 representative, and the vascular wall tissue in the nearer region of electrode is left in C2 representative.
Equally, when electrode does not contact blood vessel wall: the body of the resistance of R1 and R2 is exactly the saline between electrode, blood.When electrode contact blood vessel wall, the medium of R1 and R2 is exactly the blood vessel wall (when electrode contact blood vessel wall) between electrode.The vascular wall tissue in electrode area comparatively far away is left in R1 representative, and the vascular wall tissue in the nearer region of electrode is left in R2 representative.
When conduit ferrule be provided with comparatively porous and electrode pair time (being for a pair two electrodes), every pair of electrodes can form the equivalent circuit shown in Fig. 2.
As shown in Figure 1, the different angles in the ferrule of end of conduit all can be dispersed with and arrange some groups of electrode pairs.When the electrode pair contact blood vessel wall of different angles, the equivalent circuit that its equivalent circuit does not contact the electrode pair of heart tissue with other has a great difference; We can obtain the bending direction of conduit in blood vessel wall thus.
When conduit and vessel wall contact pressure large time, likely there are 2 kinds of situations, one is that the equivalent circuit reading of pair of electrodes departs from other reading to the equivalent circuit of electrode far away, and reading can be electric capacity and resistance, and capacitance also can be stated with frequency values.Be because contact force is large in addition, cause multipair electrode contact blood vessel wall, the equivalent circuit reading of multipair like this electrode departs from other equivalent circuit reading to electrode.
When temperature is lower than 50 degree, the AC impedance of equivalent circuit is responsive not as the dielectric constant of equivalent circuit.When 50-100 spends, AC impedance and dielectric constant are all very responsive to temperature.The AC impedance of equivalent circuit and the relation of temperature as shown in Figure 3.
When temperature is lower than 50 degree, electric capacity C1 is very responsive to temperature.When 50-100 spends, electric capacity C1 and resistance R1 is very responsive to temperature.
The preferred embodiment for the present invention accurately can also judge the bending direction of conduit, is laid with multiple capacitance type sensor be made up of two annular electrodes 2 as shown in Figure 1 outside conduit.
As shown in Figure 5, the preferred embodiment for the present invention also comprises guiding-tube bend degree sensor, and described at least one annular electrode of guiding-tube bend degree sensor, the arc-shaped electrode of four 90 degree in same plane, is installed in outside described conduit.Four pairs of capacitance sensors are formed between this annular electrode and four arc-shaped electrodes, can the bending angle of measuring guide.Four arc-shaped electrodes are the front with an annular electrode, and when the value increase of electric capacity C4 is greater than other three electric capacity, conduit bends to the direction of arc-shaped electrode corresponding to electric capacity C4.
Above-mentioned circular metal electrode pair, or the employing soft insulating material between annular and curved metal electrode pair, improve the sensitivity of sensor, also can use air or vacuum insulation.
As Fig. 2, R1C1 can form oscillating circuit, R2C2 also can form oscillating circuit, also can the change curve of frequency of utilization and temperature during test.As shown in Figure 4.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. an Intelligent medical conduit, comprises the ferrule of conduit and end of conduit, it is characterized in that, described ferrule has been evenly arranged plural hole, is all provided with one or pair of electrodes in every hole, is provided with insulating barrier between described electrode and hole wall.
2. a kind of Intelligent medical conduit according to claim 1, it is characterized in that, also comprise guiding-tube bend degree sensor, described guiding-tube bend degree sensor comprises at least one pair of annular electrode, and described annular electrode is arranged on inside described conduit or outside conduit.
3. a kind of Intelligent medical conduit according to claim 1, it is characterized in that, also comprise guiding-tube bend degree sensor, described at least one annular electrode of guiding-tube bend degree sensor, be positioned at four arc-shaped electrodes of same plane, between described four arc-shaped electrodes and insulate between arc-shaped electrode and annular electrode, it is arranged on inside described conduit or outside conduit.
4. a kind of Intelligent medical conduit according to Claims 2 or 3, is characterized in that, described guiding-tube bend degree sensor is more than 2, and dispersion is laid in conduit and often holds flexible region.
5. a kind of Intelligent medical conduit according to claim 1, it is characterized in that, also comprise conduit and vessel wall contact force transducer, described catheter contact force transducer comprises at least one pair of annular electrode, and described annular electrode is arranged on inside described conduit or outside conduit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361960025P | 2013-09-09 | 2013-09-09 | |
| US61/960025 | 2013-09-09 | ||
| US61/960,025 | 2013-09-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104224311A true CN104224311A (en) | 2014-12-24 |
| CN104224311B CN104224311B (en) | 2017-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410453873.8A Active CN104224311B (en) | 2013-09-09 | 2014-09-05 | A kind of Intelligent medical conduit |
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| Country | Link |
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| CN (1) | CN104224311B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106308922A (en) * | 2015-06-30 | 2017-01-11 | 四川锦江电子科技有限公司 | Multi-electrode ablation device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6063022A (en) * | 1997-01-03 | 2000-05-16 | Biosense, Inc. | Conformal catheter |
| US6312408B1 (en) * | 1992-01-07 | 2001-11-06 | Arthrocare Corporation | Electrosurgical probe for treating tissue in electrically conductive fluid |
| CN101756697A (en) * | 2008-12-23 | 2010-06-30 | 韦伯斯特生物官能公司 | Catheter display showing tip angle and pressure |
| US20130123775A1 (en) * | 2011-09-01 | 2013-05-16 | Debby Grunewald | Catheter adapted for direct tissue contact and pressure sensing |
-
2014
- 2014-09-05 CN CN201410453873.8A patent/CN104224311B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6312408B1 (en) * | 1992-01-07 | 2001-11-06 | Arthrocare Corporation | Electrosurgical probe for treating tissue in electrically conductive fluid |
| US6063022A (en) * | 1997-01-03 | 2000-05-16 | Biosense, Inc. | Conformal catheter |
| CN101756697A (en) * | 2008-12-23 | 2010-06-30 | 韦伯斯特生物官能公司 | Catheter display showing tip angle and pressure |
| US20130123775A1 (en) * | 2011-09-01 | 2013-05-16 | Debby Grunewald | Catheter adapted for direct tissue contact and pressure sensing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106308922A (en) * | 2015-06-30 | 2017-01-11 | 四川锦江电子科技有限公司 | Multi-electrode ablation device |
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| Publication number | Publication date |
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| CN104224311B (en) | 2017-04-05 |
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Address after: 100089, room 2, floor 127-1, No. 202-3 North Main Street, Haidian District, Beijing, Zhongguancun Applicant after: BEIJING MAKESENSE INSTITUTE OF SENSOR TECHNOLOGY CO.,LTD. Address before: 100089, room 2, floor 127-1, No. 202-3 North Main Street, Haidian District, Beijing, Zhongguancun Applicant before: BEIJING ZHIGAN SCIENIFIC TECHNOLOGY CO.,LTD. |
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Effective date of registration: 20170821 Address after: 100080 103 apartments, Ze Ze garden, Peking University, Beijing, Haidian District 402 Patentee after: Luo Ximing Address before: 100089, room 2, floor 127-1, No. 202-3 North Main Street, Haidian District, Beijing, Zhongguancun Patentee before: BEIJING MAKESENSE INSTITUTE OF SENSOR TECHNOLOGY CO.,LTD. |
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Effective date of registration: 20230423 Address after: No. 19014, 19th Floor, Building 1, No. 18 Danling Street, Haidian District, Beijing, 100080 Patentee after: Beijing Zhigan Technology Co.,Ltd. Address before: 100080 402, 103 apartment, chengzeyuan, Peking University, Haidian District, Beijing Patentee before: Luo Ximing |
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