CN104224311B - A kind of Intelligent medical conduit - Google Patents

A kind of Intelligent medical conduit Download PDF

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Publication number
CN104224311B
CN104224311B CN201410453873.8A CN201410453873A CN104224311B CN 104224311 B CN104224311 B CN 104224311B CN 201410453873 A CN201410453873 A CN 201410453873A CN 104224311 B CN104224311 B CN 104224311B
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Prior art keywords
conduit
electrode
pair
hole
blood vessel
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CN201410453873.8A
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CN104224311A (en
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詹姆斯·刘
克莉丝汀·刘
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Beijing Zhigan Technology Co ltd
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Beijing Makesense Sensor Technology Institute Co Ltd
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Abstract

The present invention relates to a kind of Intelligent medical conduit, including the ferrule of conduit and end of conduit, plural hole has been evenly arranged in the ferrule, one or a pair of electrodes is mounted in every hole, is provided with insulating barrier between the electrode and hole wall.The present invention is due to being evenly arranged plural hole in ferrule, a pair of electrodes is mounted in per hole, insulating barrier is provided between the electrode and hole wall, it is each Kong Weiyi insulating regions, a pair of electrodes is equipped with each insulating regions, can be with the temperature of heated heart tissue in pressure and ablation procedure of the monitoring tube top to blood vessel wall.

Description

A kind of Intelligent medical conduit
Technical field
The present invention relates to a kind of Intelligent medical conduit, belongs to field of medical appliances.
Background technology
Catheter ablation operation at present can treat some diseases.In catheter ablation operation process, a series of conduit will Inserted by the blood vessel from arm, belly and neck, heart is entered eventually through blood vessel.The machine of connecting conduit is defeated by conduit Go out energy, some heart tissues are melted in a small range in the form of heat using this energy, jumped with solving abnormal heart Dynamic problem.The ablation procedure of conduit is frequently necessary to radio-frequency (RF) energy, eliminates the heart of specific region using this energy production heat Dirty tissue.But in ablation procedure, heart tissue is sometimes by excessive heat;The top of medical catheter is likely to produce blood vessel wall Raw pressure is excessive, and pressure crosses conference injured blood vessel wall, so medical catheter needs the pressure that can perceive conduit and blood vessel wall, with And the temperature of heated heart tissue, it is therefore desirable to whether the maximum temperature for perceiving the tissue of ablation in time oversteps the extreme limit, with Exempt from that temperature is too high or pressure is excessive produces bigger injury to human body.
The content of the invention
The technical problem to be solved is to provide a kind of Intelligent medical conduit, overcomes medical catheter in prior art Ablation temperature can not be perceived in catheter ablation operation process, and the top of conduit is likely to pressure be produced to blood vessel wall, causes The defect of bigger harm is produced to human body.
The technical scheme that the present invention solves above-mentioned technical problem is as follows:A kind of Intelligent medical conduit, including conduit and conduit The ferrule of end, has been evenly arranged plural hole in the ferrule, be mounted on one or a pair of electrodes in every hole, Insulating barrier is provided between the electrode and hole wall.
The invention has the beneficial effects as follows:The present invention as plural hole has been evenly arranged in ferrule, per in hole One or a pair of electrodes are mounted on, insulating barrier between the electrode and hole wall, is provided with, are i.e. each Kong Weiyi insulating regions, often One or a pair of electrodes are equipped with individual insulating regions, can be with quilt in pressure and ablation procedure of the monitoring tube top to blood vessel wall The temperature of heating heart tissue.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
A kind of Intelligent medical conduit of the invention as described above, further, also including guiding-tube bend degree sensor, the conduit Flexibility sensor at least one pair of annular electrode, the annular electrode are arranged on the inside of the conduit or on the outside of conduit.
Using the beneficial effect of above-mentioned further scheme it is:As a result of the capacitive sensing of a pair of annular electrode compositions According to the change of electric capacity, device, can detect whether conduit bends during guiding-tube bend.
A kind of Intelligent medical conduit of the invention as described above, further, also including guiding-tube bend degree sensor, the conduit At least one annular electrode of flexibility sensor, be generally aligned in the same plane in four arc-shaped electrodes, four arc-shaped electrodes it Between and arc-shaped electrode and annular electrode between insulate, which is arranged on the inside of the conduit or on the outside of conduit.
Using the beneficial effect of above-mentioned further scheme it is:As four arc-shaped electrodes constitute one with annular electrode respectively Capacitance sensor, can more accurately judge the bending direction of sensor.
A kind of Intelligent medical conduit of the invention as described above, further, the guiding-tube bend degree sensor is more than 2, Dispersion is laid in the region that conduit Jing is often easily bent.
Using the beneficial effect of above-mentioned further scheme it is:More quickly and accurately can be judged according to multipair annular electrode Go out the bending direction of conduit, to ensure that conduit can smoothly reach the position for requiring operation.
A kind of Intelligent medical conduit of the invention as described above, further, also including conduit and blood vessel wall contact force sensor, The conduit and blood vessel wall contact force sensor at least one pair of annular electrode, the annular electrode be arranged on the inside of the conduit or On the outside of conduit.
Using the beneficial effect of above-mentioned further scheme it is:As a result of the capacitive sensing of a pair of annular electrode compositions Device, can detect the pressure of conduit and blood vessel wall according to the change of electric capacity during catheter contact blood vessel wall.
Description of the drawings
Fig. 1 is a kind of Intelligent medical guide-tube structure schematic diagram of the invention;
Fig. 2 is the equivalent circuit diagram in a kind of Intelligent medical conduit of the invention in ferrule during electrode detection in hole;
Fig. 3 is AC impedance and temperature during electrode detection in hole in ferrule in a kind of Intelligent medical conduit of the invention Relation schematic diagram;
Fig. 4 is that in ferrule, during electrode detection in hole, frequency is shown with temperature relation in a kind of Intelligent medical conduit of the invention It is intended to;
Fig. 5 is the structural representation of guiding-tube bend degree sensor in a kind of Intelligent medical conduit of the invention.
In accompanying drawing, the list of parts representated by each label is as follows:
1st, conduit, 2, a pair of annular electrodes, 3, annular electrode, 4, four arc-shaped electrodes, 5, the hole in ferrule, 6, Contact electrode.
Specific embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, example is served only for explaining the present invention, and It is non-for limiting the scope of the present invention.
As shown in figure 1, a kind of Intelligent medical conduit, including the ferrule of conduit and end of conduit, in the ferrule It is even to be disposed with plural hole, one or a pair of electrodes are mounted in every hole, insulation is provided between the electrode and hole wall Layer.Electrode is arranged in hole, the surface of insulating barrier, and electrode is by the outside output data of wire in conduit.
Each pair electrode in above-mentioned each hole or when an electrode in a hole, two electrodes in two holes can group Into different circuits, when electrode is connected by direct current or alternating current circuit, these electrodes can just perceive contacted saline solution And blood.When conduit and heart tissue are contacted, compare less saline and blood is arrived by above-mentioned electrode contact.At this moment, electricity AC impedance and dielectric constant between pole can be more sensitive to the temperature of heart tissue.
When AC impedance and dielectric constant between measuring electrode, the contact force of conduit and blood vessel is pressure of the conduit to blood vessel Power is the factor of the two parameters of appreciable impact, and per a pair of electrodes, and the equivalent circuit that heart tissue, saline and blood are formed is such as Shown in Fig. 2.
As shown in Fig. 2 resistance R1 and electric capacity C1 are equivalent to high-temperature area leaves contact tissue of the electrode as far as 8 millimeters, electricity Resistance R2 and electric capacity C2 is equivalent to the tissue of directly contact catheter electrode.
Many group equivalent circuits can be formed between two electrodes, as a example by two:When electrode does not contact blood vessel wall:C1 And the medium of C2 is exactly the saline between electrode, blood.When electrode contact blood vessel wall, the medium of C1 and C2 is exactly between electrode Blood vessel wall (when electrode contact blood vessel wall).C1 is represented and is left electrode vascular wall tissue regional farther out, and C2 is represented and left electricity The vascular wall tissue in the nearer region in pole.
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 between electrode (when electrode contact blood vessel wall).R1 generations Table leaves electrode vascular wall tissue regional farther out, and R2 represents the vascular wall tissue for leaving the nearer region of electrode.
When conduit ferrule is provided with compared with porous and electrode pair (a pair is two electrodes), figure can be formed per a pair of electrodes Equivalent circuit shown in 2.
As shown in figure 1, the different angles in the ferrule of end of conduit can be dispersed with some groups of electrode pairs of setting.When Different angles electrode pair contact blood vessel wall when, its equivalent circuit with other do not contact heart tissue electrode pair equivalent circuit It is very different;Thus we can obtain bending direction of the conduit in blood vessel wall.
When conduit and big blood vessel wall contact pressure, it is possible to there are 2 kinds of situations, one is that the equivalent circuit of a pair of electrodes is read Number much deviates the readings of other equivalent circuits to electrode, and reading can be electric capacity and resistance, and capacitance can also use frequency Value statement.It is, as contact force is big, to cause multipair electrode contact blood vessel wall in addition, the equivalent circuit reading of so multipair electrode is inclined Equivalent circuit reading from other to electrode.
When temperature is less than 50 degree, the AC impedance of equivalent circuit is not as the dielectric constant sensitivity of equivalent circuit.In 50- When 100 degree, AC impedance and dielectric constant are all very sensitive to temperature.The AC impedance and temperature of equivalent circuit as shown in Figure 3 Relation.
When temperature is less than 50 degree, electric capacity C1 is very sensitive to temperature.When 50-100 spends, electric capacity C1 and resistance R1 are right Temperature is very sensitive.
The preferred embodiment for the present invention can also accurately judge the bending direction of conduit, lay on the outside of conduit as shown in Figure 1 There are multiple capacitance type sensors being made up of two annular electrodes 2.
As shown in figure 5, the preferred embodiment for the present invention also includes guiding-tube bend degree sensor, the guiding-tube bend degree sensing At least one annular electrode of device, the arc-shaped electrode that 90 degree of four in same plane are installed on the outside of the conduit.This Four pairs of capacitance sensors are formed between annular electrode and four arc-shaped electrodes, the angle of guiding-tube bend can be measured.Four arcs Electrode is the front with an annular electrode, and when the value of electric capacity C4 increases more than other three electric capacity, conduit is to electric capacity C4 pair The direction bending of the arc-shaped electrode answered.
Employing soft insulating material between above-mentioned circular metal electrode pair, or annular and curved metal electrode pair, Improve the sensitivity of sensor, it is also possible to using air or vacuum insulation.
As Fig. 2, R1C1 may be constructed oscillating circuit, R2C2 can also constitute oscillating circuit, can also be using frequency during test The change curve of rate and temperature.As shown in Figure 4.
The foregoing is only presently preferred embodiments of the present invention, not to limit the present invention, all spirit in the present invention and Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.

Claims (3)

1. a kind of Intelligent medical conduit, including the ferrule of conduit and end of conduit, it is characterised in that uniform in the ferrule Plural hole is disposed with, and one or a pair of electrodes is mounted in every hole, is provided with insulating barrier between the electrode and hole wall;
Also include guiding-tube bend degree sensor, the guiding-tube bend degree sensor includes at least one pair of annular electrode, the annular Electrode is arranged on the inside of the conduit or on the outside of conduit;
Or, the guiding-tube bend degree sensor includes at least one annular electrode and four arc-shaped electrodes, four arc electricity In pole is generally aligned in the same plane, insulate between four arc-shaped electrodes and between arc-shaped electrode and annular electrode, the annular electro Pole and four arc-shaped electrodes are arranged on the inside of the conduit or on the outside of conduit.
2. a kind of Intelligent medical conduit according to claim 1, it is characterised in that the guiding-tube bend degree sensor is 2 More than, dispersion is laid in the region that conduit Jing is often easily bent.
3. a kind of Intelligent medical conduit according to claim 1, it is characterised in that also include connecing positioned at supravasal blood vessel wall Touch force sensor, the blood vessel wall contact force sensor include at least one pair of annular electrode, the blood vessel wall contact force sensor Annular electrode be arranged on the conduit on the inside of or conduit on the outside of.
CN201410453873.8A 2013-09-09 2014-09-05 A kind of Intelligent medical conduit Active CN104224311B (en)

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

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CN104224311B true CN104224311B (en) 2017-04-05

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
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 (3)

* Cited by examiner, † Cited by third party
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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8900228B2 (en) * 2011-09-01 2014-12-02 Biosense Webster (Israel) Ltd. Catheter adapted for direct tissue contact and pressure sensing

Patent Citations (3)

* Cited by examiner, † Cited by third party
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

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