CN111068162B - Catheter in-out sheath detection component and method, electrophysiology catheter and guiding sheath - Google Patents

Catheter in-out sheath detection component and method, electrophysiology catheter and guiding sheath Download PDF

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Publication number
CN111068162B
CN111068162B CN201911352374.9A CN201911352374A CN111068162B CN 111068162 B CN111068162 B CN 111068162B CN 201911352374 A CN201911352374 A CN 201911352374A CN 111068162 B CN111068162 B CN 111068162B
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catheter
positioning sensor
sheath
tail end
magnetic positioning
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CN111068162A (en
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朱晓林
李楚武
邹波
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Sichuan Jinjiang Electronic Medical Device Technology Co ltd
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Sichuan Jinjiang Electronic Science and Technology Co Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0127—Magnetic means; Magnetic markers

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  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
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  • General Health & Medical Sciences (AREA)
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Abstract

The invention discloses a catheter in-out sheath detection component, which comprisesThe interference assembly is arranged at the tail end sheath of the guide sheath and can generate an interference magnetic field; the first magnetic positioning sensor is arranged on a tail end catheter of the electrophysiology catheter and can output a normal signal in a magnetic field generated by the magnetic field generator; the second magnetic positioning sensor is arranged on the tail end catheter and can output normal signals in a magnetic field generated by the magnetic field generator; the distance from the end of the interference component far away from the opening of the tail end sheath to the opening of the tail end sheath is D1The first magnetic positioning sensor and the second magnetic positioning sensor are arranged at intervals along the axial direction of the tail end catheter, and the distance is D2A first magnetic positioning sensor near the end of the distal catheter, the first magnetic positioning sensor being located behind the adjustable bending zone of the distal catheter, D1＝D2. The detection part can judge whether the adjustable bending area of the tail end catheter extends out of the tail end sheath pipe or not according to the principle of magnetic field interference.

Description

Catheter in-out sheath detection component and method, electrophysiology catheter and guiding sheath
Technical Field
The invention relates to the technical field of medical guide puncture, in particular to a catheter in-out sheath detection component and method, an electrophysiology catheter and a guide sheath.
Background
The guiding sheath tube is a channel for the electrophysiology catheter to enter the heart and can assist the catheter to reach a designated tissue position, so that an operator always encounters a problem in the operation process at present, whether the head end of the catheter is sheathed or not, and the catheter is likely to be damaged and the judgment of a doctor is influenced by the bending operation of the catheter in the sheath tube.
The conventional solutions now are:
1. observing whether the end electrode of the catheter head collects the electrophysiological signals, and because blood exists in the sheath, the electrophysiological signals can be collected even in the sheath, so that the method is extremely inaccurate;
2. the positions of the catheter and the sheath are determined under the X-ray, and the method increases the X-ray exposure of the operator and the patient and does not utilize the physical health of the operator and the patient.
Disclosure of Invention
The invention aims to: aiming at the problems that whether a catheter head terminal electrode is out of a sheath can not be accurately determined by using a potential detection mode and the problems that a patient and a doctor are greatly radiated and the health is harmed by using an X-ray sheath entering and exiting mode, the prior art provides a catheter sheath entering and exiting detection part and method, an electrophysiological catheter and a guiding sheath.
In order to achieve the purpose, the invention adopts the technical scheme that:
a catheter access sheath detection component comprising:
the interference assembly is arranged at the tail end sheath of the guide sheath and can generate an interference magnetic field;
the first magnetic positioning sensor is arranged on a tail end catheter of the electrophysiology catheter and can output a normal signal in a magnetic field generated by the magnetic field generator;
the second magnetic positioning sensor is arranged on the tail end catheter and can output a normal signal in a magnetic field generated by the magnetic field generator;
wherein, the distance from one end of the interference component far away from the tail end sheath pipe opening to the tail end sheath pipe opening is D1The first magnetic positioning sensor and the second magnetic positioning sensor are arranged along the axial direction of the tail end catheter at intervals with a distance D2The first magnetic positioning sensor is close to the end part of the tail end catheter, the first magnetic positioning sensor is positioned behind the adjustable bending area of the tail end catheter, and D1＝D2。
By adopting the catheter in-out sheath detection component, the interference component is used for respectively interfering the first magnetic positioning sensor and the second magnetic positioning sensor, and the distance from one end of the interference component, which is far away from the tail end sheath opening, to the tail end sheath opening is equal to the distance between the first magnetic positioning sensor and the second magnetic positioning sensor, so that when the first magnetic positioning sensor outputs a normal signal and the second magnetic positioning sensor generates an interference signal, the bendable region of the tail end catheter can be judged to extend out of the tail end sheath.
Preferably, the interfering member is a ring structure.
Preferably, the interfering component is a permanent magnet.
Preferably, the first magnetic positioning sensor and the second magnetic positioning sensor are coils wound by electrode wires, and can generate current signals in a magnetic field generated by the magnetic field generator.
The invention also provides a method for detecting the entry and exit of a catheter by applying the detection component as described in any one of the above steps, which comprises the following steps:
A. the tail end catheter is inserted into the guide sheath, and the first magnetic positioning sensor and the second magnetic positioning sensor both output normal signals in a magnetic field generated by the magnetic field generator;
B. continuing to advance the distal catheter, the first magnetic positioning sensor generating an interfering signal and the second magnetic positioning sensor outputting a normal signal indicating that the first magnetic positioning sensor is now at the interfering assembly;
C. continuing to advance the distal catheter until the first magnetic position sensor outputs a normal signal and the second magnetic position sensor generates an interfering signal indicating that the second magnetic position sensor is at the interfering component due to D1＝D2And the adjustable bending area of the tail end catheter extends out of the tail end sheath.
By adopting the method for detecting the sheath entering and exiting of the catheter, disclosed by the invention, the position of the electrophysiological catheter can be identified on the guiding sheath by utilizing the principle of magnetic field interference under the condition of not increasing processing equipment, and whether the adjustable bending area of the tail end catheter extends out of the tail end sheath is judged.
The invention also provides an electrophysiology catheter which comprises a tail end catheter, wherein a first magnetic positioning sensor and a second magnetic positioning sensor are arranged at an interval of D along the axial direction of the tail end catheter2Said first magnetic positioning sensor being proximate to an end of said tip catheter, said first magnetic positioning sensorThe device is positioned behind the adjustable bending area of the tail end catheter, and the first magnetic positioning sensor and the second magnetic positioning sensor can output normal signals in a magnetic field generated by the magnetic field generator;
the electrophysiology catheter is used for being matched with a guide sheath, an interference component is arranged on a tail end sheath of the guide sheath, the interference component can generate an interference magnetic field, and the interference component is far away from one end of an opening of the tail end sheath to the distance D from the opening of the tail end sheath1，D1＝D2。
By adopting the electrophysiology catheter, whether the adjustable bending area of the tail end catheter extends out of the tail end sheath can be judged according to the principle of magnetic field interference.
Preferably, the distal catheter end is provided with a plurality of electrodes.
Further preferably, the electrodes are located on a side wall of the tip catheter.
Further preferably, the electrodes are evenly distributed.
The invention also provides a guide sheath tube, which comprises a tail end sheath tube, wherein an interference component is arranged on the tail end sheath tube, the interference component can generate an interference magnetic field, and the distance from one end of the interference component far away from the opening of the tail end sheath tube to the opening of the tail end sheath tube is D1；
The guiding sheath is used for matching with an electrophysiology catheter, and the tail end catheter of the electrophysiology catheter is axially provided with a distance D at intervals2The first magnetic positioning sensor and the second magnetic positioning sensor are close to the end part of the tail end catheter, the first magnetic positioning sensor is located behind the adjustable bending area of the tail end catheter, and the first magnetic positioning sensor and the second magnetic positioning sensor can output normal signals in a magnetic field generated by the magnetic field generator respectively, and D is1＝D2。
By adopting the guiding sheath catheter, whether the adjustable bending area of the tail end catheter extends out of the tail end sheath catheter or not can be judged according to the principle of magnetic field interference.
Preferably, the guiding sheath tube is designed to be 8.5F, the wall of the inner cavity of the sheath tube is made of PTFE (polytetrafluoroethylene) material, the guiding sheath tube has good self-lubricating performance, a woven layer is arranged outside the wall of the inner cavity of the sheath tube, and an outer tube layer is arranged outside the woven layer.
Further preferably, the woven layer is a stainless steel wire woven layer.
Further preferably, the outer tube layer is a polyurethane material or PEBAX (polyether block polyamide).
Further preferably, the material of the outer tube layer is provided with a developing material.
Further preferably, the developing material comprises 20% of the material of the outer tube layer.
Further preferably, the developing material is barium sulfate.
Preferably, the interference component is arranged on the wall of the inner cavity of the sheath tube.
Further preferably, the interference component is bonded to the wall of the sheath lumen.
Preferably, the end sheath end side wall is provided with a vent hole provided on the end sheath for the purpose of facilitating a suction operation and reducing a void bubble.
Further preferably, the vent hole is 3mm-5mm away from the end sheath opening.
Preferably, the tail end sheath tube is connected with an adjustable bending section, and the adjustable bending section is connected with the control handle.
Further preferably, the adjustable bending section is connected with a straight pipe section, and the straight pipe section is connected with the control handle.
Further preferably, the adjustable bending section and the straight pipe section are both provided with a woven steel wire layer, and the woven steel wire layer is used for enhancing the rigidity and the torque performance of the pipe body.
Further preferably, the layer of braided steel wires is a double-strand braided member.
Further preferably, the adjustable bending section comprises a traction ring and a support hose connected with the traction ring, the traction ring is connected with the tail end sheath, the support hose is connected with the control handle, a traction rope is arranged in the support hose, one end of the traction rope is connected with the traction ring, and the other end of the traction rope is connected with the control handle.
Further preferably, two of the pull cords are attached to opposite sides of the pull ring.
Further preferably, the hauling cable is a stainless steel cable.
Further preferably, the traction ring is a stainless steel ring.
Further preferably, the support hose is a PTFE tube or a polyimide tube, which has a low friction coefficient and can be used for smooth sliding of the pulling rope therein.
Further preferably, the traction ring is connected to the interference assembly.
Preferably, a knob is arranged on the control handle and used for retracting the traction rope to perform bending adjustment control on the adjustable bending section.
Further preferably, the knob is used for controlling the adjustable bending section to bend when rotating clockwise, and is used for controlling the adjustable bending section to straighten when rotating anticlockwise.
Further preferably, the tail part of the control handle is provided with a three-way pipe, and the three-way pipe is used for injecting medicines and physiological saline.
Further preferably, the three-way pipe is connected with a hemostatic valve for the passage of an electrophysiology catheter, a puncture needle or a dilatation tube.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the catheter in-out sheath detection component, the interference component is used for respectively interfering the first magnetic positioning sensor and the second magnetic positioning sensor, and the distance from one end, far away from the tail end sheath opening, of the interference component to the tail end sheath opening is equal to the distance between the first magnetic positioning sensor and the second magnetic positioning sensor, so that when the first magnetic positioning sensor outputs a normal signal and the second magnetic positioning sensor generates an interference signal, the fact that the bendable region of the tail end catheter extends out of the tail end sheath can be judged, and the catheter in-out sheath detection component is simple in structure, convenient to use and good in effect;
2. according to the method for detecting the sheath passing in and out of the catheter, disclosed by the invention, the position of the electrophysiological catheter can be identified on the guiding sheath by utilizing the principle of magnetic field interference under the condition that no processing equipment is added, and whether the adjustable bending area of the tail end catheter extends out of the tail end sheath is judged;
3. the electrophysiology catheter can judge whether the adjustable bending area of the tail end catheter extends out of the tail end sheath catheter or not according to the principle of magnetic field interference, and has the advantages of simple structure, convenience in manufacturing and good effect;
4. the guiding sheath pipe can judge whether the adjustable bending area of the tail end catheter extends out of the tail end sheath pipe or not according to the principle of magnetic field interference.
Drawings
Fig. 1 is a schematic structural view of an adjustable bending guiding sheath according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic sectional view A-A of FIG. 2;
FIG. 4 is a schematic structural diagram of the interference component;
FIG. 5 is a schematic diagram of the magnetic field disturbance principle;
FIG. 6 is a schematic view of catheter access sheath detection (unsheathed);
FIG. 7 is a schematic view of catheter access sheath detection (partial sheath removal);
fig. 8 is a schematic view of catheter access sheath detection (fully unsheathed).
Icon: 01-end catheter, 02-first magnetic positioning sensor, 03-second magnetic positioning sensor, 04-magnetic field generated by magnetic field generator, 1-end sheath, 11-sheath lumen, 2-adjustable bending section, 3-straight tube section, 4-control handle, 41-three-way tube, 42-hemostatic valve, 43-knob, 5-vent hole, 6-interference component, 7-traction ring, 8-traction rope, 9-support hose.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1-8, a guiding sheath and an electrophysiology catheter used in conjunction therewith according to the present invention.
The guide sheath and the electrophysiology catheter are respectively provided with a catheter in-out sheath detection component which is used in a matched mode, and the catheter in-out sheath detection component comprises an interference component 6, a first magnetic positioning sensor 02 and a second magnetic positioning sensor 03.
The design of guide sheath pipe is 8.5F, and its sheath pipe inner chamber 11's wall is made for having good self-lubricating performance's PTFE material, be equipped with the weaving layer outside the 11 walls of sheath pipe inner chamber, the weaving layer is the stainless steel wire weaving layer, be equipped with outer tube layer outward, outer tube layer is polyurethane material or PEBAX, be equipped with development material in the material of outer tube layer, development material accounts for 20% of the material on outer tube layer, specifically, development material is barium sulfate.
The guiding sheath pipe comprises a tail end sheath pipe 1, an adjustable bending section 2, a straight pipe section 3 and an operation handle 4 which are connected in sequence.
Set up on terminal sheath 1 interference subassembly 6, interference subassembly 6 can produce the interference magnetic field, interference subassembly 6 is far away from 1 open-ended one end of terminal sheath is arrived 1 open-ended distance of terminal sheath is D1(ii) a Interference component 6 bond in on the wall of sheath pipe inner chamber 11, be equipped with exhaust hole 5 on the 1 tip lateral wall of terminal sheath pipe, exhaust hole 5 sets up the last purpose of terminal sheath pipe 1 is the suction operation of being convenient for and reduces the cavity bubble, exhaust hole5 is 3mm-5mm away from the opening of the tail end sheath tube 1.
Specifically, the interference component 6 is an annular permanent magnet structure, and includes elements such as iron, cobalt, and nickel.
The adjustable bending section 2 comprises a traction ring 7 and a support hose 9 connected with the traction ring 7, the traction ring 7 is a stainless steel ring, the traction ring 7 is connected with the interference component 6 of the tail end sheath tube 1, the support hose 9 is connected with the control handle 4, two traction ropes 8 are arranged in the support hose 9, the two traction ropes 8 are connected to two opposite sides of the traction ring 7, the traction ropes 8 are stainless steel wire ropes, one end of each traction rope 8 is connected with the traction ring 7, the other end of each traction rope is connected with the control handle 4, the support hose 9 is a PTFE (polytetrafluoroethylene) tube or a polyimide tube, and the friction coefficient of the tube is low, so that the adjustable bending section can be used for smooth sliding of the traction ropes 8 in the tube; the adjustable bending section 2 and the straight pipe section 3 are both provided with a woven steel wire layer, the woven steel wire layer is used for enhancing the rigidity and the torque performance of the pipe body, and the woven steel wire layer is a double-strand woven component.
A knob 43 is arranged on the control handle 4, the knob 43 is used for retracting and releasing the traction rope 8 to perform bending control on the adjustable bending section 2, the knob 43 is used for controlling the adjustable bending section 2 to bend when rotating clockwise, and the knob 43 is used for controlling the adjustable bending section 2 to straighten when rotating anticlockwise; the tail of the control handle 4 is provided with a three-way pipe 41, the three-way pipe 41 is used for injecting medicines and physiological saline, the three-way pipe 41 is connected with a hemostatic valve 42, and the hemostatic valve 42 is used for allowing an electrophysiological catheter, a puncture needle or an expansion tube to pass through.
The electrophysiology catheter comprises a tail end catheter 01, wherein the tail end catheter 01 is axially arranged at intervals with a distance D2The first magnetic positioning sensor 02 and the second magnetic positioning sensor 03, the first magnetic positioning sensor 02 is close to the end part of the tail end catheter 01, the first magnetic positioning sensor 02 is located behind the bending adjustable region of the tail end catheter 01, the first magnetic positioning sensor 02 and the second magnetic positioning sensor 03 can both output normal signals in a magnetic field 04 generated by a magnetic field generator, and D is1＝D2。
Specifically, the first magnetic positioning sensor 02 and the second magnetic positioning sensor 03 are coils wound by electrode wires, and can generate current signals in a magnetic field 04 generated by the magnetic field generator.
The end part of the tail end guide pipe 01 is provided with a plurality of electrodes which are uniformly distributed on the side wall of the tail end guide pipe 01.
By applying the guiding sheath and the electrophysiology catheter, whether the adjustable bending area of the tail end catheter 01 extends out of the tail end sheath 1 can be judged according to the principle of magnetic field interference, specifically, the interference component 6 is used for respectively interfering the first magnetic positioning sensor 02 and the second magnetic positioning sensor 03, since the distance from the end of the interference element 6 remote from the opening of the distal sheath 1 to the opening of the distal sheath 1 is equal to the distance between the first magnetic positioning sensor 02 and the second magnetic positioning sensor 03, therefore, when the first magnetic positioning sensor 02 outputs a normal signal, and the second magnetic positioning sensor 03 generates an interference signal, the bending adjustable area of the tail end catheter 01 can be judged to extend out of the tail end sheath 1, and the guiding sheath and the electrophysiology catheter are simple in structure, convenient to manufacture and good in effect.
Example 2
As shown in fig. 1-8, a method for detecting sheath entry and exit of a catheter according to the present invention is applied to a guiding sheath and an electrophysiology catheter used with the guiding sheath as described in embodiment 1, and the method comprises the following steps:
A. the distal catheter 01 is inserted into the guiding sheath, and the first magnetic positioning sensor 02 and the second magnetic positioning sensor 03 both output normal signals in the magnetic field 04 generated by the magnetic field generator, and no electrophysiological signal is detected by the electrode on the distal catheter 01;
B. continuing to advance the distal catheter 01, the first magnetic positioning sensor 02 generates an interference signal and the second magnetic positioning sensor 03 outputs a normal signal indicating that the first magnetic positioning sensor 02 is now at the interfering assembly 6;
C. continue to propel forwardThe distal catheter 01 until the first magnetic positioning sensor 02 outputs a normal signal, the second magnetic positioning sensor 03 generates an interference signal, and the electrode on the distal catheter 01 detects the electrophysiological signal, indicating that the second magnetic positioning sensor 03 is located at the interfering component 6, due to D1＝D2The bending adjustable area of the tail end catheter 01 extends out of the tail end sheath 1.
By using the principle of magnetic field interference, the method for detecting the sheath passing in and out of the catheter can identify the position of the electrophysiological catheter on the guiding sheath without adding processing equipment, and judge whether the bendable region of the tail end catheter 01 extends out of the tail end sheath 1.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A catheter access sheath detection component, comprising:
the interference assembly (6) is arranged at the tail end sheath (1) of the guide sheath, and the interference assembly (6) can generate an interference magnetic field;
the first magnetic positioning sensor (02) is arranged on a tail end catheter (01) of the electrophysiological catheter, and the first magnetic positioning sensor (02) can output a normal signal in a magnetic field (04) generated by the magnetic field generator;
a second magnetic positioning sensor (03) arranged on the tail end catheter (01), wherein the second magnetic positioning sensor (03) can output a normal signal in a magnetic field (04) generated by the magnetic field generator;
wherein, the distance from one end of the interference component (6) far away from the opening of the tail end sheath tube (1) to the opening of the tail end sheath tube (1) is DlThe first magnetic positioning sensor (02) and the second magnetic positioning sensor (03) are axially arranged at intervals along the tail end catheter (01), and the distance is D2The first magnetic positioning sensor (02) is close to the end part of the tail end catheter (01), the first magnetic positioning sensor (02) is positioned behind the adjustable bending area of the tail end catheter (01), and D1= D2When the first magnetic positioning sensor outputs a normal signal and the second magnetic positioning sensor generates an interference signal, the bendable region of the tail end catheter can be judged to extend out of the tail end sheath.
2. The detection member according to claim 1, wherein the interference component (6) is of annular configuration.
3. Detection member according to claim i, characterized in that the interference component (6) is a permanent magnet.
4. A sensing member according to any of claims 1-3, characterized in that the first magnetic position sensor (02) and the second magnetic position sensor (03) are each a coil of electrode wire.
5. A method of catheter access sheath testing using the test device of any one of claims 1-4, the method comprising the steps of:
A. the end catheter (01) is inserted into the guiding sheath, and the first magnetic positioning sensor (02) and the second magnetic positioning sensor (03) both output normal signals in a magnetic field (04) generated by the magnetic field generator;
B. continuing to advance the distal catheter (01), the first magnetic positioning sensor (02) generating an interfering signal and the second magnetic positioning sensor (03) outputting a normal signal indicating that the first magnetic positioning sensor (02) is now at the interfering component (6);
C. and continuously advancing the tail end catheter (01) until the first magnetic positioning sensor (02) outputs a normal signal, the second magnetic positioning sensor (03) generates an interference signal, the second magnetic positioning sensor (03) is positioned at the interference component (6) at the moment, and the bendable region of the tail end catheter (01) extends out of the tail end sheath (1).
6. An electrophysiology catheter, characterized by comprising a distal catheter (01), along which a first magnetic positioning sensor (02) and a second magnetic positioning sensor (03) are axially spaced at a distance D2The first magnetic positioning sensor (02) is close to the end part of the tail end catheter (01), the first magnetic positioning sensor (02) is positioned behind the adjustable bending area of the tail end catheter (01), and the first magnetic positioning sensor (02) and the second magnetic positioning sensor (03) can both output normal signals in a magnetic field (04) generated by a magnetic field generator;
the electrophysiology catheter is used for being matched with a guide tip, an interference component (6) is arranged on a tail end sheath (1) of the guide tip, the interference component (6) can generate an interference magnetic field, and the distance from one end, opening of the tail end sheath (1), of the interference component (6) to the opening of the tail end sheath (1) is D1，D1=D2 ；
When the first magnetic positioning sensor outputs a normal signal and the second magnetic positioning sensor generates an interference signal, the adjustable bending area of the tail end catheter can be judged to extend out of the tail end sheath.
7. The electrophysiology catheter according to claim 6, characterized in that the tip catheter (01) is terminated with several electrodes.
8. The utility model provides a guide sheath pipe, its characterized in that, includes terminal sheath pipe (1), be equipped with interference subassembly (6) on terminal sheath pipe (1), interference subassembly (6) can produce the interference magnetic field, interference subassembly (6) are kept away from terminal sheath pipe (1) open-ended one end is arrived terminal sheath pipe (1) open-ended distance is D1；
The guiding sheath is used for matching with an electrophysiology catheter, and the tail end catheter (01) of the electrophysiology catheter is axially provided with a distance D at intervals2A first magnetic positioning sensor (02) and a second magnetic positioning sensor (03), said first magnetic positioning sensor (02) being proximate to said end conductorThe end of a pipe (01), the first magnetic positioning sensor (02) is positioned behind the adjustable bending area of the tail end catheter (01), the first magnetic positioning sensor (02) and the second magnetic positioning sensor (03) can both output normal signals in a magnetic field (04) generated by the magnetic field generator, and D1= D2 ；
When the first magnetic positioning sensor outputs a normal signal and the second magnetic positioning sensor generates an interference signal, the adjustable bending area of the tail end catheter can be judged to extend out of the tail end sheath.
9. Guiding sheath according to claim 8, characterized in that the distal sheath (1) is connected to an adjustable bending section (2), the adjustable bending section (2) being connected to a steering handle (4).
10. Guiding sheath according to claim 9, characterized in that the adjustable bending section (2) comprises a pulling ring (7) and a supporting hose (9) connected to the pulling ring (7), the pulling ring (7) is connected to the end sheath (1), the supporting hose (9) is connected to the control handle (4), a pulling rope (8) is arranged in the supporting hose (9), one end of the pulling rope (8) is connected to the pulling ring (7), and the other end is connected to the control handle (4).
CN201911352374.9A 2019-12-24 2019-12-24 Catheter in-out sheath detection component and method, electrophysiology catheter and guiding sheath Active CN111068162B (en)

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CN115212434A (en) * 2021-04-15 2022-10-21 上海微创电生理医疗科技股份有限公司 Medical catheter and three-dimensional magnetic positioning system
CN114209417A (en) * 2021-12-13 2022-03-22 四川锦江电子科技有限公司 Visual depth ablation catheter

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Denomination of invention: Detection components and methods for catheter in and out sheath, as well as electrophysiological catheter and guide sheath

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