CN117159126A - Multipolar catheter with accurate morphological display - Google Patents
Multipolar catheter with accurate morphological display Download PDFInfo
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- CN117159126A CN117159126A CN202311237486.6A CN202311237486A CN117159126A CN 117159126 A CN117159126 A CN 117159126A CN 202311237486 A CN202311237486 A CN 202311237486A CN 117159126 A CN117159126 A CN 117159126A
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- 230000000877 morphologic effect Effects 0.000 title claims abstract description 30
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 3
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000002679 ablation Methods 0.000 description 8
- 230000005684 electric field Effects 0.000 description 5
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 210000003492 pulmonary vein Anatomy 0.000 description 3
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 3
- 210000001519 tissue Anatomy 0.000 description 3
- 206010003658 Atrial Fibrillation Diseases 0.000 description 2
- 206010003119 arrhythmia Diseases 0.000 description 2
- 230000006793 arrhythmia Effects 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 206010003130 Arrhythmia supraventricular Diseases 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000001746 atrial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 210000003748 coronary sinus Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000007831 electrophysiology Effects 0.000 description 1
- 238000002001 electrophysiology Methods 0.000 description 1
- 210000005003 heart tissue Anatomy 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000006386 memory function Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00053—Mechanical features of the instrument of device
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
- A61B2018/00345—Vascular system
- A61B2018/00351—Heart
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00577—Ablation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B2018/1405—Electrodes having a specific shape
- A61B2018/1407—Loop
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B2018/1467—Probes or electrodes therefor using more than two electrodes on a single probe
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Abstract
The application discloses a multipolar catheter with accurate morphological display, which comprises an end hose, a first magnetic positioning sensor and a second magnetic positioning sensor, wherein the end hose is arc-shaped; the end hard tube is L-shaped, one end of the end hard tube is connected with one end of the end hose, a first L-shaped edge of the end hard tube and the end hose form an annular member, the orthographic projection of a second L-shaped edge of the end hard tube on the annular member is positioned at the free end of the end hose, a third magnetic positioning sensor is arranged in the end hard tube, a plurality of annular electrodes are sleeved on the outer wall of the annular member, and all the annular electrodes are arranged at intervals; and the supporting member is a memory alloy member, penetrates through the end hard tube and the end hose along the length direction of the end hard tube and the end hose, and can be used for recovering after the end hose is deformed. The catheter has the advantages of novel structure, accurate positioning, convenient manufacture and good use effect.
Description
The application is a divisional application of a patent application with the name of multipolar catheter with precise morphological display, with the application date of 2019, 12, 24 and the application number of 201911354428.5.
Technical Field
The application relates to a medical electrophysiology catheter, in particular to a multipolar catheter with accurate morphological display.
Background
Atrial fibrillation is a common arrhythmia and is a major cause of stroke due to the presence of transmitted reentrant wavelets in the matrix of abnormal atrial tissue, where the position of the wavelets must first be determined for treatment, and it is currently common to use catheters with mapping assemblies to measure peripheral activity in pulmonary veins, coronary sinus or other tubular structures about the structures and then to ablate and isolate them. In ablation, staring energy or high voltage pulse energy is applied through electrodes on the catheter to form an ablation focus to interrupt the pathway in the tissue leading to the arrhythmia, ablation of the ostium of the pulmonary veins is accepted as a treatment for atrial arrhythmias, particularly atrial fibrillation.
The presently known technique has a distal portion of the catheter that presents a loop shape with electrodes evenly distributed thereon, such that the electrodes form a continuous loop around the ostium of the pulmonary vein for the purpose of isolating the ostium. In order to improve the mapping and ablation efficiency and safety of the annular electrode, the position relation between the electrode and the tissue and the shape of the electrode assembly need to be determined in real time, and the prior art utilizes the electrode on the annular electrode to display the physical shape, but the mode is influenced by the defect of the electric field, so that the problem of inaccurate positioning exists.
Disclosure of Invention
The application aims to provide a multipolar catheter with accurate morphological display, aiming at the problems that the medical electrophysiological catheter in the prior art utilizes an electrode on a ring electrode to display physical morphology, but the mode is influenced by the defects of an electric field and has inaccurate positioning.
In order to achieve the above purpose, the technical scheme adopted by the application is as follows:
a multipolar catheter with accurate morphological display, comprising:
the tail end hose is arc-shaped and is internally provided with a first magnetic positioning sensor and a second magnetic positioning sensor;
the end hard tube is L-shaped, one end of the end hard tube is connected with one end of the end soft tube, a first L-shaped edge of the end hard tube and the end soft tube form an annular member, the orthographic projection of a second L-shaped edge of the end hard tube on the annular member is positioned at the free end of the end soft tube, a third magnetic positioning sensor is arranged in the end hard tube, a plurality of ring electrodes are sleeved on the outer wall of the annular member, and all the ring electrodes are arranged at intervals;
and the supporting member is a memory alloy member, penetrates through the end hard tube and the end hose along the length direction of the end hard tube and the end hose, and can be used for recovering after the end hose is deformed.
By adopting the multipolar catheter with accurate morphological display, the third magnetic positioning sensor is arranged on the end hard tube in a mode of arranging the plurality of magnetic positioning sensors, and the position of the third magnetic positioning sensor is unchanged when the tail end of the catheter is deformed, so that the second magnetic positioning sensor is used as a reference fixed point to cooperate with the first magnetic positioning sensor and the second magnetic positioning sensor which can displace, and a plane is established at three points, thereby accurately capturing and acquiring the morphology and the position of the annular member, solving the problem that the morphology and the position of the tail end of the catheter cannot be accurately displayed in a pure electric field mode.
Preferably, the multipolar catheter with accurate morphological display further comprises a double-cavity fixing tube, wherein the double-cavity fixing tube is a flexible hose, the double-cavity fixing tube is respectively arranged in the tail end hose at the corresponding position of the first magnetic positioning sensor and the second magnetic positioning sensor, the double-cavity fixing tube is arranged in the tail end hard tube at the corresponding position of the third magnetic positioning sensor, one cavity of the double-cavity fixing tube is used for allowing the supporting member to pass through, and the other cavity is used for arranging the first magnetic positioning sensor, the second magnetic positioning sensor or the third magnetic positioning sensor.
In general, the magnetic positioning sensor is connected by winding the magnetic coil on the outer side of the connector, but in the application, if the magnetic coil of the magnetic positioning sensor is directly wound on the outer side of the supporting member, the mode is easily interfered by the metal member of the supporting member in the magnetic coil, so as to influence the positioning precision.
Preferably, the third magnetic positioning sensor is located within the second L-shaped edge of the distal stiffening tube.
Preferably, the second magnetic positioning sensor and the third magnetic positioning sensor are disposed opposite to each other, the
A first magnetic positioning sensor is located between the free end of the end hose and the second magnetic positioning sensor, and the angle between the second magnetic positioning sensor and the first magnetic positioning sensor is 120 °.
Preferably, all the ring electrodes are uniformly arranged along the annular member.
Preferably, the free end of the end hose is provided with a head end member.
Preferably, the outer wall of the second L-shaped edge of the end hard tube is sleeved with a first developing ring electrode and a second developing ring electrode, and the first developing ring electrode and the second developing ring electrode are arranged at intervals.
Preferably, the multipolar catheter with accurate morphological display further comprises a regulating tube which is a flexible hose, wherein the supporting member is arranged in the regulating tube in a penetrating manner, one end of the regulating tube is connected to the other end of the terminal hard tube, a third developing ring electrode and a fourth developing ring electrode are sleeved on the outer wall of the regulating tube, and the third developing ring electrode and the fourth developing ring electrode are arranged at intervals.
Preferably, the multipolar catheter with accurate morphological display further comprises:
one end of the control handle is connected with the other end of the adjusting tube;
the push button is arranged on the control handle, a traction member is arranged in the second L-shaped edge of the tail end hard tube, and the traction member is used for bending the adjusting tube relative to the control handle after the push button is started;
and the connector is arranged at the other end of the control handle and is used for transmitting the electrode information and the magnetic positioning sensor information to the equipment for processing.
The application also provides a multipolar catheter with accurate morphological display as claimed in any of the preceding claims, each of said ring electrodes on said ring member being replaced by an electrode pair, each of said electrode pairs comprising two electrodes, said electrode pairs being spaced apart from each other by a centre of 2-5mm.
The multipolar catheter with accurate morphological display can be used for interelectrode ablation between electrode pairs when a focus is ablated, and the applied energy can be radio frequency energy or high-voltage pulse energy.
In summary, due to the adoption of the technical scheme, the beneficial effects of the application are as follows:
1. by using the multipolar catheter with accurate morphological display, the third magnetic positioning sensor is arranged on the end hard tube in a mode of arranging a plurality of magnetic positioning sensors, and the position of the third magnetic positioning sensor is unchanged when the tail end of the catheter is deformed, so that the third magnetic positioning sensor is used as a reference fixed point to cooperate with the first magnetic positioning sensor and the second magnetic positioning sensor which can displace, and a plane is established at three points, so that the morphology and the position of the annular member can be accurately captured and acquired, the problem that the morphology and the position of the tail end of the catheter cannot be accurately displayed in a pure electric field mode is solved, the catheter is novel in structural form, accurate in positioning, convenient to manufacture and good in use effect;
2. the multipolar catheter with accurate morphological display has the advantages that the magnetic positioning sensor and the supporting member are arranged through the double cavities of the double-cavity fixing tube respectively, so that the interference of the supporting member to the magnetic positioning sensor is avoided, the positioning precision is greatly improved, and the catheter is small in structure and convenient to manufacture and process due to the fact that the catheter is used for extending into a blood vessel;
3. when the multipolar catheter with accurate morphological display is used, interelectrode ablation can be carried out between electrode pairs when a focus is ablated, and the applied energy can be radio frequency energy or high-voltage pulse energy.
Drawings
FIG. 1 is a schematic view of the multipolar catheter of example 1 (in its natural state);
FIG. 2 is a schematic view of the multipolar catheter of example 1 (axially stretched state);
FIG. 3 is a cross-sectional view A-A of FIG. 1;
FIG. 4 is a cross-sectional view B-B of FIG. 1;
FIG. 5 is a schematic view of the magnetic positioning sensor arrangement position in embodiment 1;
FIG. 6 is a top view of FIG. 5;
FIG. 7 is a schematic view of the magnetic positioning sensor arrangement position in embodiment 1;
FIG. 8 is a schematic diagram of the magnetic positioning sensor package of example 1;
FIG. 9 is a schematic representation of the manipulation of the multipolar catheter described in example 1;
FIG. 10 is a schematic view of the structure (natural state) of the multipolar catheter of example 2;
fig. 11 is a schematic view of the structure (axially stretched state) of the multipolar catheter of example 2.
Icon: 1-end hose, 2-end hard tube, 201-first developing ring electrode, 202-second developing ring electrode, 203-traction member, 3-ring electrode, 4-head end member, 5-first magnetic positioning sensor, 6-second magnetic positioning sensor, 7-third magnetic positioning sensor, 8-support member such as double-lumen fixed tube, 10-adjusting tube, 1001-third developing ring electrode, 1002-fourth developing ring electrode, 11-operating handle, 12-push button, 13-connector, 14-electrode pair.
Detailed Description
The present application will be described in detail with reference to the accompanying drawings.
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Example 1
As shown in fig. 1 to 9, a multipolar catheter with precise morphological display according to the present application includes an arc-shaped distal hose 1, an L-shaped distal rigid tube 2, a support member 8, a double lumen fixed tube 9, an adjusting tube 10, and a steering handle 11.
As shown in fig. 9, one end of the end hose 1 is adhered to one end of the end hard tube 2, the other end of the end hard tube 2 is connected with one end of the adjusting tube 10, the other end of the adjusting tube 10 is connected with one end of the control handle 11, the other end of the control handle 11 is provided with a connector 13, and the control handle 11 is provided with a push button 12.
The end hose 1 is a flexible material member such as TPU (Thermoplastic polyurethanes, thermoplastic polyurethane elastomer rubber); the end hard tube 2 is a rigid material member such as PEEK (poly-ether-ketone); the supporting member 8 is an alloy member having a memory function, such as nickel-titanium alloy; the double-cavity fixing tube 9 is a flexible hose, such as a nylon tube or a polyimide tube; the regulator tube 10 is a multi-lumen braided flexible hose, with the outer layer preferably being a polyurethane material.
As shown in fig. 7, the supporting member 8 is an elongated member having good stretching and restoring properties, and as shown in fig. 3, 4 and 7, the supporting member 8 penetrates the adjusting tube 10, the end hard tube 2 and the end hose 1 in the length direction of the adjusting tube 10, the end hard tube 2 and the end hose 1, and the supporting member 8 can be used for restoring after the deformation of the end hose 1 and the adjusting tube 10; specifically, the outer diameters of the end hose 1 and the end hard tube 2 are 15mm to 25mm.
As shown in fig. 1, 2, 5 and 6, the shape of the distal catheter formed by the distal hose 1 and the distal hard tube 2 is determined by the supporting member 8, and is generally configured as a left-handed spiral, the first L-shaped edge of the distal hard tube 2 and the distal hose 1 form a left-handed spiral annular member, the second L-shaped edge of the distal hard tube 2 is located at the free end of the distal hose 1 in the orthographic projection of the annular member, the free end of the distal hose 1 is provided with a head end member 4, the head end member 4 is in a blunt cone shape for protecting heart tissue from being damaged by the catheter, the outer wall of the annular member is sleeved with ten ring electrodes 3, all the ring electrodes 3 are arranged at equal intervals, the spacing between adjacent ring electrodes 3 is 4.5mm, 6mm or 8mm according to the difference of the outer diameter sizes of the ring members, and the wires of the ring electrodes 3 are connected to the control handle 11 from the inside of the distal hose 1 and the inside of the distal hard tube 2, and the tip end member 1 is called a first ring electrode 3 adjacent to the ring electrode 4 on the distal hose 1; when the focus is ablated, energy can be applied to the ring electrodes 3 on the annular member to wholly ablate neutral electrodes, or two adjacent ring electrodes 3 in ten ring electrodes 3 can be ablated between electrodes, and the energy can be radio frequency energy or high-voltage pulse energy.
As shown in fig. 4 and 9, a traction member 203 is disposed in the second L-shaped edge of the distal hard tube 2, the traction member 203 is used for bending the adjusting tube 10 relative to the control handle 11 after the push button 12 is started, and the connector 13 is used for transmitting electrode information and magnetic positioning sensor information to a device for processing.
As shown in fig. 2 and 5, a first magnetic positioning sensor 5 and a second magnetic positioning sensor 6 are arranged in the end hose 1, and a third magnetic positioning sensor 7 is arranged in the second L-shaped edge of the end hard tube 2.
As shown in fig. 6, the second magnetic positioning sensor 6 and the third magnetic positioning sensor 7 are disposed opposite to each other, the first magnetic positioning sensor 5 is located between the free end of the end hose l and the second magnetic positioning sensor 6, and an angle between the second magnetic positioning sensor 6 and the first magnetic positioning sensor 5 is 120 °.
As shown in fig. 5 and 6, the spatial position of the first magnetic positioning sensor 5 is T1 (X1, Y1, Z1), the spatial position of the second magnetic positioning sensor 6 is T2 (X2, Y2, Z2), the spatial position of the third magnetic positioning sensor 7 is T3 (X3, Y3, Z3), the spatial position T3 of the third magnetic positioning sensor 7 is projected onto the first L-shaped side of the distal hard tube 2 to form a spatial position T3 '(X3', Y3', Z3'), and as shown in fig. 6, the included angle between T3 'and T2 is also 120 °, since the distal hard tube 2 is not deformed, T3' is fixed with respect to the T3 position, T1, T2, and T3 are all measurable, the spatial coordinates of T3 'are known amounts when T3 is the reference point, and T1, T2, and T3' are the same on the annular member, the form of the annular member can be obtained by capturing precisely three points.
As shown in fig. 8, the end hose 1 corresponding to the positions of the first magnetic positioning sensor 5 and the second magnetic positioning sensor 6 is respectively provided with the dual-cavity fixing tube 9, the end hard tube 2 corresponding to the position of the third magnetic positioning sensor 7 is internally provided with the dual-cavity fixing tube 9, and one of the dual-cavity fixing tubes 9 is provided with the dual-cavity fixing tube 9
A cavity is used for the passage of the support member 8, and another cavity is used for the setting of the first magnetic positioning sensor 5, the second magnetic positioning sensor 6 or the third magnetic positioning sensor 7.
As shown in fig. 1, a first developing ring electrode 201 and a second developing ring electrode 202 are sleeved on the outer wall of the second L-shaped edge of the end hard tube 2, the first developing ring electrode 201 and the second developing ring electrode 202 are arranged at intervals, the first developing ring electrode 201 and the second developing ring electrode 202 are used for detecting whether the end hard tube 2 is sheathed in actual application, when all the first developing ring electrode 201 and the second developing ring electrode 202 are in the sheath tube, the potential difference detected when all the first developing ring electrode 201 and the second developing ring electrode 202 are out of the sheath tube is different from the potential difference detected when all the first developing ring electrode 201 and the second developing ring electrode 202 are out of the sheath tube, and then the position relation between the first developing ring electrode 201 and the second developing ring electrode 202 and the sheath tube is judged, and whether the end hard tube 2 is sheathed is never judged; the wires of the first developing ring electrode 201 and the second developing ring electrode 202 are connected to the control handle 11 from the inside of the end hard tube 2.
As shown in fig. 9, a third developing ring electrode 1001 and a fourth developing ring electrode 1002 are sleeved on the outer wall of the adjusting tube 10, the third developing ring electrode 1001 and the fourth developing ring electrode 1002 are arranged at intervals, when the adjusting tube 10 is bent, the position relationship between the third developing ring electrode 1001 and the fourth developing ring electrode 1002 changes, and thus the potential change is caused, the shape of the adjusting tube 10 can be indirectly calculated, and the shape display of the adjusting tube 10 is realized; the wires of the third developing ring electrode 1001 and the fourth developing ring electrode 1002 are connected to the control handle 11 from the inside of the adjusting tube 10.
By using the multipolar catheter with accurate morphological display, the third magnetic positioning sensor 7 is arranged on the end hard tube 2 in a mode of arranging a plurality of magnetic positioning sensors, and the position of the third magnetic positioning sensor 7 is unchanged when the tail end of the catheter is deformed, so that the third magnetic positioning sensor 7 is taken as a reference fixed point, the spatial position information of the third magnetic positioning sensor 7 is projected to a fixed point position on the annular member, the fixed point position is matched with the first magnetic positioning sensor 5 and the second magnetic positioning sensor 6 which can displace on the annular member, a plane is established at three points on the annular member, the morphology and the position of the annular member can be accurately captured and acquired, the problem that the morphology and the position of the tail end of the catheter cannot be accurately displayed by using a pure electric field mode is solved, and meanwhile, the position output calculation is facilitated to be simplified, and the positioning result is faster and more convenient; the magnetic positioning sensor and the supporting member 8 are respectively arranged through the double cavities of the double-cavity fixing tube 9, so that the interference of the supporting member 8 to the magnetic positioning sensor is avoided, the positioning precision is greatly improved, and the catheter is used for extending into a blood vessel, so that the structure is smaller, and the double-cavity fixing tube 9 is convenient to manufacture and process, and the production cost is reduced; the catheter has the advantages of novel structure, accurate positioning, convenient manufacture and good use effect.
Example 2
As shown in fig. 10 to 11, a multipolar catheter with precise morphological display according to the present application is different from embodiment 1 in that in this embodiment, each of the ring electrodes 3 on the ring member in embodiment 1 is replaced with an electrode pair 14, each of the electrode pairs 14 includes two electrodes, and the center interval of the electrode pairs 14 is 2 to 5mm.
When the multipolar catheter with accurate morphological display is used for ablation of a focus, the electrode pair 14 can be used for interelectrode ablation, and the applied energy can be radio frequency energy or high-voltage pulse energy.
The foregoing description of the preferred embodiment of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.
Claims (10)
1. A multipolar catheter with accurate morphological display, comprising:
the end hose (1) is arc-shaped, a first magnetic positioning sensor (5) and a second magnetic positioning sensor (6) are arranged in the end hose, and the end hose (1) is a flexible material member;
the end hard tube (2) is L-shaped, one end of the end hard tube is connected with one end of the end hose (1), a first L-shaped edge of the end hard tube (2) and the end hose (1) form an annular member, the orthographic projection of a second L-shaped edge of the end hard tube (2) on the annular member is positioned at the free end of the end hose (1), a third magnetic positioning sensor (7) is arranged in the end hard tube (2), a plurality of annular electrodes (3) are sleeved on the outer wall of the annular member, and all the annular electrodes (3) are arranged at intervals;
a support member (8) that is a memory alloy member, the support member (8) penetrating the distal hard tube (2) and the distal hose (1) in a longitudinal direction of the distal hard tube (2) and the distal hose (1); the shape of the end conduit formed by the end hose (1) and the end hard tube (2) is determined by the support member (8);
the double-cavity fixing tube (9) is a flexible hose, the tail end hose (1) at the corresponding position of the first magnetic positioning sensor (5) and the second magnetic positioning sensor (6) is respectively provided with the double-cavity fixing tube (9), the tail end hard tube (2) at the corresponding position of the third magnetic positioning sensor (7) is internally provided with the double-cavity fixing tube (9), one cavity of the double-cavity fixing tube (9) is used for the supporting member (8) to penetrate through, the other cavity is used for setting the first magnetic positioning sensor (5), the second magnetic positioning sensor (6) or the third magnetic positioning sensor (7), the magnetic positioning sensors comprise magnetic coils, and the first magnetic positioning sensor (5) and the second magnetic positioning sensor (6) on the tail end hose (1) are fixed in the cavity of the double-cavity fixing tube (9) close to the inner side of the annular member.
2. Multipolar catheter with accurate morphological display according to claim 1, characterized in that the third magnetic positioning sensor (7) is located inside the second L-shaped edge of the terminal stiffening tube (2).
3. Multipolar catheter with accurate morphological display according to claim 2, characterized in that said second magnetic positioning sensor (6) and said third magnetic positioning sensor (7) are oppositely arranged, said first magnetic positioning sensor (5) being located between the free end of said terminal hose (1) and said second magnetic positioning sensor (6), and the angle between said second magnetic positioning sensor (6) and said first magnetic positioning sensor (5) being 120 °.
4. Multipolar catheter with accurate morphological display according to claim 1, characterized in that all the ring electrodes (3) are uniformly arranged along the annular member.
5. Multipolar catheter with accurate morphological display according to claim 1, characterized in that the free end of the terminal hose (1) is provided with a head end member (4).
6. Multipolar catheter with accurate morphological display according to claim 5, characterized in that the outer diameter of the end hose (1) is 15-25 mm.
7. Multipolar catheter with accurate morphological display according to claim 1, characterized in that the second L-shaped edge outer wall of the terminal hard tube (2) is sleeved with a first developing ring electrode (201) and a second developing ring electrode (202), the first developing ring electrode (201) and the second developing ring electrode (202) being arranged at intervals.
8. Multipolar catheter with precise morphological indication according to any of claims 1-7, characterized in that it further comprises a regulating tube (10) which is a flexible hose, inside which is provided with said support member (8) through, one end of said regulating tube (10) being connected to the other end of said terminal stiffening tube (2), the outer wall of said regulating tube (10) being sheathed with a third developing ring electrode (1001) and a fourth developing ring electrode (1002), said third developing ring electrode (1001) and fourth developing ring electrode (1002) being arranged at intervals.
9. The multipolar catheter with accurate morphological display of claim 8, further comprising:
a control handle (11), one end of which is connected with the other end of the adjusting tube (10);
the push button (12) is arranged on the control handle (11), a traction member (203) is arranged in the second L-shaped edge of the end hard tube (2), and the traction member (203) is used for bending the adjusting tube (10) relative to the control handle (11) after the push button (12) is started;
and the connector (13) is arranged at the other end of the control handle (11) and is used for transmitting electrode information and magnetic positioning sensor information to the equipment.
10. Multipolar catheter with accurate morphological display according to any of claims 1-7, characterized in that each of the ring electrodes (3) on the ring member is replaced by an electrode pair (14), each of the electrode pairs (14) comprising two electrodes, the electrode pairs (14) being spaced apart at a centre of 2-5mm.
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CN117752404A (en) * | 2024-02-22 | 2024-03-26 | 四川锦江电子医疗器械科技股份有限公司 | Cardiac electrophysiology mapping and ablation catheter |
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CN213525440U (en) * | 2020-06-29 | 2021-06-25 | 杭州诺茂医疗科技有限公司 | Ablation catheter |
CN111658134B (en) * | 2020-07-10 | 2021-09-21 | 四川锦江电子科技有限公司 | Cardiac pulse electric field ablation catheter |
CN112294430B (en) * | 2020-09-17 | 2022-05-13 | 杭州堃博生物科技有限公司 | Radio frequency ablation catheter and preparation method thereof |
CN113367795A (en) * | 2021-05-31 | 2021-09-10 | 浙江大学 | Ureteroscope soft lens with magnetic positioning function and ureteroscope pose estimation system |
CN114366286A (en) * | 2022-01-27 | 2022-04-19 | 四川锦江电子科技有限公司 | Ablation catheter |
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US8600472B2 (en) * | 2008-12-30 | 2013-12-03 | Biosense Webster (Israel), Ltd. | Dual-purpose lasso catheter with irrigation using circumferentially arranged ring bump electrodes |
US9220433B2 (en) * | 2011-06-30 | 2015-12-29 | Biosense Webster (Israel), Ltd. | Catheter with variable arcuate distal section |
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CN117752404A (en) * | 2024-02-22 | 2024-03-26 | 四川锦江电子医疗器械科技股份有限公司 | Cardiac electrophysiology mapping and ablation catheter |
CN117752404B (en) * | 2024-02-22 | 2024-05-07 | 四川锦江电子医疗器械科技股份有限公司 | Cardiac electrophysiology mapping and ablation catheter |
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