CN111789588A - Mapping catheter - Google Patents
Mapping catheter Download PDFInfo
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- CN111789588A CN111789588A CN202010741452.0A CN202010741452A CN111789588A CN 111789588 A CN111789588 A CN 111789588A CN 202010741452 A CN202010741452 A CN 202010741452A CN 111789588 A CN111789588 A CN 111789588A
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- mapping
- catheter
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- curved rod
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6852—Catheters
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6852—Catheters
- A61B5/6856—Catheters with a distal loop
Abstract
The invention provides a mapping catheter, which is used for detecting and treating a heart part and comprises: a catheter body and a mapping curved shaft, the catheter body having a distal end and a proximal end; the mapping curved rod is connected to the distal end part, and a plurality of pairs of mapping electrode pairs for acquiring the electric signals of the heart part are arranged on the mapping curved rod; when the mapping curved rod is in a mapping state, a part of the mapping curved rod forms a closed annular mapping part; when the mapping curved rod is in the accommodating state, the mapping curved rod is in a straightened state and has the same extending direction as the catheter body. According to the mapping catheter provided by the embodiment of the invention, the ring mapping part at the distal end part of the mapping catheter can be opened and closed for adjustment, so that the mapping catheter is suitable for mapping operation aiming at different parts and different targets, and the closed ring mapping part can be rotated in any forward direction or reverse direction, so that the operation technology is simplified, the in-place failure rate is reduced, and the difficulty in learning and training is reduced.
Description
Technical Field
The invention relates to the technical field of medical devices, in particular to a mapping catheter.
Background
The configuration of the ring-shaped mapping portion at the tip of the mapping catheter is a common configuration of the high-density mapping catheter. However, in the related art, the ring mapping portion has an opening, resulting in the following disadvantages of the high-density mapping catheter having the ring mapping portion:
the annular mapping part can only rotate in one direction in a heart cavity, and if the annular mapping part rotates reversely, the head end at the opening is easy to insert into an intracardiac structure to cause the problems of hooking, winding, damage and the like; the annular mapping part is easy to deform in the moving mapping process, so that the positioning accuracy is influenced; when the annular mapping part needs to be operated to enter structures such as blood vessels or auricles, the annular mapping part can only enter the structures in a forward rotating mode, so that the complexity, the failure rate and the learning difficulty of the operation are increased, and the operation efficiency is reduced; due to the cumulative effect of the unidirectional rotation turns in the operation process, the extension connecting wire at the tail end of the mapping catheter is seriously wound, and the fine control of the catheter by an operator and the coordination of the extension guide wire and peripheral instruments are seriously influenced.
Disclosure of Invention
The invention provides a mapping catheter, aiming at solving the technical problem of how to improve the operation convenience and the mapping quality of the mapping catheter.
A mapping catheter according to an embodiment of the present invention for use in detection and treatment of a cardiac site, the mapping catheter comprising:
a catheter body having a distal end and a proximal end;
the mapping curved rod is connected to the distal end part, and a plurality of pairs of mapping electrode pairs for acquiring the electric signals of the heart part are arranged on the mapping curved rod;
when the mapping curved shaft is in a mapping state, a portion of the mapping curved shaft forms a closed annular mapping portion; when the mapping curved rod is in the accommodating state, the mapping curved rod is in a straightened state and has the same extending direction as the catheter body.
According to the mapping catheter disclosed by the embodiment of the invention, the annular mapping part at the distal end part of the mapping catheter can be adjusted in an opening and closing manner, so that the mapping catheter is suitable for mapping operation aiming at different positions and different targets. The annular mapping part can rotate in the heart cavity in two directions, and the problems of hooking, winding, damage and the like caused by the fact that the mapping catheter is inserted into an intracardiac structure due to the open loop are effectively avoided. The diameter of the annular mapping part can be adjusted, when the annular mapping part enters blood vessels with different diameters, the diameter of the electrode ring can be adjusted, and the contact quality of the mapping electrode and the inner wall of the blood vessel is improved.
In addition, in the moving mapping process, the annular mapping part is in a completely closed state, so that deformation is not easy to cause, and the accuracy of mapping and positioning is ensured. When the cyclic mapping part needs to be operated to enter special structures such as blood vessels or auricles, the cyclic mapping part can be operated to enter the vessels or auricles in any forward or reverse rotation mode, the operation technology is simplified, the in-place failure rate is reduced, the learning and training difficulty is reduced, the operation efficiency is obviously improved, the accumulation effect of the number of unidirectional rotation turns of the existing cyclic mapping catheter in the operation process is overcome, meanwhile, the catheter can be rotated reversely at any time, the winding of the extension lead at the tail end of the catheter is loosened, and the fine control of a surgeon on the catheter and the coordination and matching of the extension lead and peripheral instruments are effectively guaranteed.
In addition, when the catheter is currently sent and withdrawn, the annular mapping part is in a completely closed state, so that the annular mapping part is not deformed and does not move slowly, and the contact stability and the operation speed of the mapping electrode pair are improved.
According to some embodiments of the invention, the mapping catheter further comprises: a control assembly, the control assembly comprising:
a control knob disposed at the proximal end portion;
the first traction wire is connected between the free end of the mapping curved rod and the control button, and when mapping is performed, the control button controls the mapping curved rod to move through the first traction wire so as to form the annular mapping part.
In some embodiments of the invention, the control knob is switchable between a first operative state and a second operative state,
when the control knob is in the first working state, the first traction wire is in a loose state;
when the control knob is in the second working state, the control knob is matched with the first traction wire, and when the control knob is rotated in a first direction, the mapping bending rod moves towards the trend of closing the annular detection part under the action of the first traction wire; when the control knob is rotated in a second direction, the mapping bending rod moves towards the trend of opening the annular detection part under the action of elastic restoring force;
wherein the direction of rotation of the first direction is opposite to the direction of rotation of the second direction.
According to some embodiments of the invention, the mapping catheter further comprises:
a guide sleeve slidably disposed over the catheter body, the guide sleeve straightening and receiving the mapping curved shaft into the guide sleeve when the guide sleeve is slid over the catheter body toward the distal end portion.
In some embodiments of the invention, the control assembly further comprises:
the control handle is arranged at the proximal end part;
a second pull wire connected between the control handle and the distal end portion, the control handle controlling bending and straightening of the distal end portion of the catheter body via the second pull wire.
According to some embodiments of the invention, the plane of the ring-shaped mapping portion is perpendicular to the extending direction of the catheter body when the mapping catheter is in the mapping state.
In some embodiments of the invention, the plurality of pairs of mapping electrodes are equally spaced on the curved mapping shaft.
According to some embodiments of the present invention, the mapping curved shaft is further provided with a plurality of positioning chips for positioning.
In some embodiments of the present invention, one positioning chip is disposed on the mapping curved shaft adjacent to each pair of the mapping electrode pairs.
According to some embodiments of the invention, the mapping curved shaft is a pre-formed helically curved flexible shaft.
Drawings
Fig. 1 is a schematic structural view of a mapping catheter according to an embodiment of the present invention, with a ring-shaped mapping portion in a closed state;
fig. 2 is a schematic structural view of a mapping catheter according to an embodiment of the present invention, with the ring mapping portion in a deployed state;
fig. 3 is a schematic structural view of a mapping catheter according to an embodiment of the present invention, with the annular mapping portion in a straightened containment state;
fig. 4 is a schematic structural view of a curved mapping rod according to an embodiment of the present invention, with the annular mapping portion in a closed state;
fig. 5 is a schematic view of a structure of a mapping curved shaft according to an embodiment of the invention, with the ring mapping portion in a deployed state;
fig. 6 is a schematic structural view of a mapping curved shaft according to an embodiment of the present invention, wherein the annular mapping portion is in a straightened containment state;
fig. 7 is a schematic partial structure view of a mapping catheter according to an embodiment of the invention;
fig. 8 is a partial structural schematic view of a control assembly of a mapping catheter in accordance with an embodiment of the invention.
Reference numerals:
a mapping catheter 100;
a mapping curved rod 20, a mapping electrode pair 210, a proximal electrode 211, a distal electrode 212, a positioning chip 220, and a ring mapping part 230;
a control knob 310, a first pull wire 321, a second pull wire 322, a control handle 330;
a guide sleeve 40;
and a plug 50.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.
The high-density annular mapping electrode catheter is mainly used for overall three-dimensional modeling of a target heart cavity, high-density mapping of local structures and fine positioning of target points. To achieve these objectives, it is necessary to rapidly and accurately reach the target site with the tip electrode ring of the extracorporeal catheter, ensuring high quality contact of all electrodes with the inner wall of the cardiovascular cavity. The basic mapping action of moving the catheter by the external manipulation handle includes: advancing and retracting the catheter, rotating the catheter, changing the bend of the tip of the catheter, and an organic combination of the three.
Because the head electrode rings of the existing annular high-density mapping catheter all adopt an open-loop structure, the following defects of inconvenient operation and influence on mapping precision exist as described in the background technology.
In addition to the foregoing major drawbacks, there are significant limitations to how the operator manipulates the handle in vitro to perform the basic mapping described above:
when the catheter is fed and withdrawn at present, the head end of the electrode ring of the catheter is easy to deform and move and delay due to the open-loop structure, so that the contact stability and the operation speed of the electrode are influenced; due to the adoption of the open-loop design, the catheter can only be operated in a one-way rotation mode along the open-loop direction, and only half of operation paths and methods can be used for all positioning and moving, so that the operation speed, the success rate of in-place catheter and the efficiency are obviously reduced; when the bending degree of the head end of the catheter is changed by operating the handle, the head end of the electrode ring is easy to deform when encountering the cardiovascular intracavity structure, and the subsequent movement and mapping of the electrode ring are influenced.
In view of the above-mentioned drawbacks of the existing mapping catheters, the present invention provides a mapping catheter 100, and according to the mapping catheter 100 of the embodiment of the present invention, the mapping catheter 100 is used for detecting and treating a heart region. As shown in fig. 1 and 2, the mapping catheter 100 includes: a catheter body 10 and a mapping curved shaft 20.
Wherein the catheter body 10 has a distal end and a proximal end. It should be noted that the "distal end" and "proximal end" are described herein with respect to the location of the mapping catheter 100 near the operator. In performing the procedure, one end of the mapping catheter 100 extends into the patient, which may be understood as a distal end of the catheter body 10 (e.g., the front end of the mapping catheter 100 shown in fig. 1 and 2), while the end located outside the patient and near the operator may be understood as a proximal end of the catheter body 10 (e.g., the rear end of the mapping catheter 100100 shown in fig. 1 and 2).
The curved mapping rod 20 is connected to the distal end portion, and a plurality of pairs of mapping electrode pairs 210 for acquiring electrical signals of the heart portion are arranged on the curved mapping rod 20. As shown in fig. 4-6, each pair of mapping electrodes 210 includes two mapping electrodes, a proximal electrode 211 and a distal electrode 212.
As shown in fig. 1 and 4, when the mapping curved rod 20 is in the mapping state, a portion of the mapping curved rod 20 forms a closed loop mapping portion 230. It can be appreciated that by forming the closed mapping ring 230, hooking and damaging of the open mapping curved shaft 20 to the tissue structure during the operation can be effectively avoided, and the mapping ring 230 can be conveniently rotated in both clockwise and counterclockwise directions.
It should be noted that the diameter of the enclosed cyclic mapping portion 230 may be adjusted to adjust the cyclic mapping portion 230 accordingly for different detection targets. Furthermore, as shown in fig. 2 and 5, the annular mapping portion 230 may also be deployed to a certain configuration when a particular target structure is being marked.
As shown in fig. 3 and 6, when the mapping curved rod 20 is in the stowed state, the mapping curved rod 20 is in a straightened state and in the same direction as the catheter body 10. Thereby, the expansion space of the mapping curved shaft 20 may be reduced, facilitating the delivery of the mapping catheter 100 to the target location, and, further, facilitating the withdrawal of the mapping catheter 100 from the patient.
According to the mapping catheter 100 of the embodiment of the invention, the ring-shaped mapping portion 230 at the distal end of the mapping catheter 100 can be adjusted in an opening and closing manner, and is suitable for mapping operations aiming at different positions and different targets. The cyclic mapping portion 230 can rotate bi-directionally in the heart chamber, and effectively avoids the problems of hooking, winding, damage and the like caused by the fact that the mapping catheter 100 is inserted into an intracardiac structure due to an open loop. The diameter of the annular mapping part 230 can be adjusted, when the blood vessel with different diameters is entered, the diameter of the electrode ring can be adjusted, and the contact quality of the mapping electrode and the inner wall of the blood vessel is improved.
Moreover, in the moving mapping process, the ring mapping part 230 is in a completely closed state, so that deformation is not easy to cause, and the accuracy of mapping and positioning is ensured. When the cyclic mapping part 230 needs to be operated to enter special structures such as blood vessels or auricles, the cyclic mapping catheter can be operated to enter the vessels or auricles in any forward or reverse rotation mode, the operation technology is simplified, the in-place failure rate is reduced, the difficulty in learning and training is reduced, the operation efficiency is obviously improved, the accumulation effect of the number of unidirectional rotation turns of the existing cyclic mapping catheter 100 in the operation process is overcome, meanwhile, the catheter can be rotated reversely at any time, the winding of the extension lead at the tail end of the catheter is loosened, and the fine control of a surgeon on the catheter and the coordination and matching of the extension lead and peripheral instruments are effectively guaranteed.
In addition, when the catheter is advanced and retracted, the mapping portion 230 does not deform and move slowly because the mapping portion 230 is in a fully closed state, which improves the contact stability and operation speed of the mapping electrode pair 210.
According to some embodiments of the present invention, as shown in fig. 1, 7, and 8, the mapping catheter 100 further comprises: a control assembly, the control assembly comprising: a control knob 310 and a first pull wire 321.
The control button 310 is disposed at the proximal end, the first traction wire 321 is connected between the free end of the mapping curved rod 20 and the control button 310, and the control button 310 controls the mapping curved rod 20 to move through the first traction wire 321 to form the annular mapping portion 230 during the mapping. Thus, the state of the mapping ring 230 can be conveniently adjusted by the control knob 310.
In some embodiments of the present invention, and as shown in conjunction with fig. 7 and 8, control knob 310 is switchable between a first operating state and a second operating state. For example, the control knob 310 may be pressed to a predetermined depth within the catheter body 10 or may be in a non-pressed home position. The first operation state may be a state in which the control knob 310 is in the original position, and the second operation state may be understood as a state in which the control knob 310 is pressed to a predetermined depth in the catheter main body 10.
When the control knob 310 is in the first working state, the first traction wire 321 is in a slack state; when the control knob 310 is in the second working state, the control knob 310 is engaged with the first traction wire 321, and when the control knob 310 is rotated in the first direction, the mapping curved rod 20 moves towards the closed loop detection part under the action of the first traction wire 321; when the control knob 310 is rotated in the second direction, the mapping bent rod 20 moves toward a tendency of opening the loop detection part by the elastic restoring force.
Wherein the rotation direction of the first direction is opposite to the rotation direction of the second direction. For example, one of the first direction and the second direction may be a clockwise rotation direction and the other may be a counterclockwise rotation direction.
According to some embodiments of the present invention, as shown in fig. 3, the mapping catheter 100 further comprises: and the guide sleeve 40, wherein the guide sleeve 40 is slidably sleeved on the catheter body 10, and when the guide sleeve 40 slides on the catheter body 10 towards the distal end part, the mapping curved rod 20 is straightened and contained in the guide sleeve 40. It should be noted that during the process of delivering the mapping catheter 100 into the patient or withdrawing the mapping catheter 100 from the patient, the annular mapping portion 230 may be straightened into the guide sleeve 40, thereby facilitating the advancement and retraction of the mapping catheter 100.
In some embodiments of the present invention, as shown in fig. 7, the control assembly further comprises: a control handle 330 and a second pull wire 322.
Wherein the control handle 330 is disposed at the proximal end portion, the second pull wire 322 is connected between the control handle 330 and the distal end portion, and the control handle 330 controls the bending and straightening of the distal end portion of the catheter body 10 through the second pull wire 322. Thus, the bent and straightened configuration of the distal end portion of the catheter body 10 can be conveniently adjusted by the control handle 330.
According to some embodiments of the present invention, as shown in fig. 1, the plane in which the ring-shaped mapping portion 230 lies is perpendicular to the direction of extension of the catheter body 10 when the mapping catheter 100 is in the mapping state. Thus, the attachment of the annular mapping portion 230 to the target location is facilitated, improving the ease of attachment of the mapping electrode pair 210.
In some embodiments of the present invention, as shown in fig. 4-6, multiple pairs of mapping electrode pairs 210 are arranged at equal intervals on the mapping curved shaft 20. As such, uniformity of distribution of the mapping electrode pairs 210 may be improved, which may improve accuracy and reliability of mapping. For example, the mapping curved shaft 20 may have 10 pairs of mapping electrode pairs 210 disposed thereon at equal intervals.
According to some embodiments of the present invention, a plurality of positioning chips 220 for positioning are further disposed on the mapping curved shaft 20. Thereby, the circular mapping portion 230 is positioned by the positioning chip 220.
In some embodiments of the present invention, one positioning chip 220 is disposed on the curved mapping rod 20 adjacent to each pair of mapping electrode pairs 210. Thus, the location and distribution of the mapping electrode pairs 210 is conveniently obtained.
According to some embodiments of the present invention, the mapping curved shaft 20 is a pre-formed helically curved flexible shaft. As shown in fig. 5, the mapping curved shaft 20 is in a helically curved state without being subjected to other external forces. When the mapping bending rod 20 is acted by external force, elastic deformation is generated, and after the external force is withdrawn, the mapping bending rod 20 is restored to a spiral bending state under the action of the elastic restoring force of the mapping bending rod 20.
A mapping catheter 100 according to the present invention is described in detail below in one specific embodiment with reference to the drawings. It is to be understood that the following description is only exemplary, and not a specific limitation of the invention.
The mapping catheter 100 of the present invention is a deformable high-density mapping catheter 100. As shown in fig. 1 and 2, the mapping catheter 100 includes: a catheter body 10, a mapping curved shaft 20, an introducer sheath 40, and a control assembly. The proximal end of the mapping catheter 100 has a pigtail socket 110 for connecting a plug 50 that mates with a catheter extension.
The mapping curved shaft 20 is a preformed spiral-curved elastic flexible shaft, and the mapping curved shaft 20 is located at the distal end of the catheter body 10 (i.e., the front end of the mapping catheter 100 shown in fig. 1 and 2) and connected to the catheter body 10. The mapping curved shaft 20 has four functional states: a fully closed ring state (fig. 4), a maximally open state (fig. 5), a fully straightened state (fig. 6), and an adjusted open state (similar to fig. 5, except that the degree of opening is reduced). In the natural state, the mapping bent rod 20 is in the maximum opening state by means of the preset tension of the mapping bent rod (fig. 5).
The basic configuration and function of the mapping curved shaft 20 is as follows:
as shown in fig. 4, when the curved mapping rod 20 is in the fully closed state, a closed ring-shaped mapping portion 230 is formed, and the diameter D of the ring-shaped mapping portion 230 is greater than 2cm and the outer diameter is greater than 4F. In the initial state, if the external force is not applied, the mapping bending rod 20 is in the maximum open loop state by the self-tension, as shown in fig. 5.
The mapping bent rod 20 is uniformly provided with 10 pairs of mapping electrode pairs 210, and the number of the mapping electrode pairs 210 is 1-10 from the far end to the near end. The individual mapping electrodes are numbered 1-20 from cephalic to caudal. Each mapping electrode pair 210 is provided with a micro-positioning chip 220 near, and the number of the micro-positioning chip is consistent with that of the adjacent mapping electrode pair 210, so that the micro-positioning chip is used for realizing accurate positioning by matching with three-dimensional electrophysiological mapping.
As shown in fig. 7 and 8, the control assembly includes: a control knob 310, a control handle 330, a first pull wire 321, and a second pull wire 322.
Wherein, the distal attachment point of the first traction wire 321 is located at the head end of the mapping bending rod 20, and the proximal attachment point is located on the control knob 310. The first traction wire 321 functions to include: the shape (fully closed loop, maximum opening, different opening diameters as required) of the bending rod 20 is adjusted and mapped by straightening the electrode ring with the guide sleeve 40.
The functions of the control handle 330 include: advancing and retracting the mapping catheter 100, rotating the mapping catheter 100 clockwise and counterclockwise, bending the tip of the mapping catheter 100 to different degrees, and adjusting the functional status of the mapping bent rod 20.
The control handle 330 includes: a handle and a sliding handle. The handle is used for holding the catheter body 10, completing various operation actions and adjusting the functional state of the mapping bending rod 20. The sliding handle is used to bend the head end of the mapping catheter 100, sliding forward to increase bending and returning backward to decrease bending.
The mapping catheter 100 has a pull wire therein for controlling the bending operation of the tip. The distal attachment point of the pull wire is at the expected bend of the distal portion and the proximal attachment point is at the tail of the slider. The sliding point of the traction steel wire is positioned at the bottom of the sliding handle sliding groove, and the sliding handle sliding groove is used for fixing the sliding handle, providing a track for the sliding handle to move back and forth, reserving a space for the sliding handle to move back and forth and realizing the sliding turning of the traction steel wire.
The control knob 310 is located at the tail of the handle and has two functional states: the knob is pulled out a little and enters a ready state. At this time, the first traction wire 321 can be rapidly paid out and retracted by a little pulling force. And pressing the knob to return to the original position and entering a working state. At this time, rotating the control knob 310 clockwise or counterclockwise can precisely extend and retract the first traction wire 321, thereby accurately adjusting the opening and closing degree of the ring mapping portion 230.
The control knob 310 functions to control different functional states of the mapping curved shaft 20:
1. when the control knob 310 is in the ready state, the first traction wire 321 can be easily released or retracted, and the guide sleeve 40 is engaged to straighten the mapping curved rod 20.
2. The opening and closing degree of the mapping curved rod 20 is adjusted. When the control knob 310 is in the working state, the operator rotates the control knob 310 clockwise or counterclockwise to adjust the diameter of the ring mapping portion 230 according to the requirement.
3. A fully closed loop state mapping portion. Rotating the control knob 310 may fully tighten the first traction wire 321, leaving the cyclic mapping portion 230 in a fully closed ring state.
The first traction wire 321 is connected with a damping spring for presetting a minimum tension of the first traction wire 321 and keeping the first traction wire 321 in a straightened state.
The introducer sheath 40 is preloaded onto the catheter body 10 immediately distal of the slide handle and is free to slide back and forth. When the distal end is extended a little, the opening at the tail of the sheath can be accessed, allowing the straightened mapping curved shaft 20 to enter the channel of the sheath. The guide sleeve 40 is used to cooperate with the control assembly to straighten the mapping curved rod 20 and guide the distal tip of the mapping catheter 100 into the sheath opening. After the mapping curved shaft 20 has fully entered the sheath, the guide sleeve 40 may be retracted to near the sliding handle for use.
The method of operation of the retractable loop high-density mapping catheter 100 is as follows:
s1, the control button 310 is pulled out, and the device enters a ready state. At this time, the first traction wire 321 can be easily paid out or retracted with only a small pulling force.
S2, moving the guide sleeve 40 to the heel of the mapping curved rod 20. The control handle 330 is held in one hand and the guide sheath 40 is advanced in one hand until the mapping curve shaft 20 is fully straightened and enters the guide sheath 40 (as shown in fig. 3).
S3, the head end of the guiding sleeve 40 is sent to the tail entrance of the sheath, and a temporary passage for the mapping curved rod 20 to enter the sheath is established.
S4, holding the sheath end with one hand, and advancing the mapping catheter 100 with the other hand until reaching the first depth mark of the catheter body of the mapping catheter 100. At this point, the mapping curved shaft 20 is fully extended out of the introducer sheath 40 and all the way into the sheath.
S5, withdraw the guide sleeve 40 and move to the vicinity of the sliding handle for standby.
S6, advancing the mapping catheter 100 to a second depth marker of the catheter body, where the mapping curved shaft 20 is located within 2cm of the sheath tip.
S7, the mapping catheter 100 is advanced to the third depth marker of the catheter body, and the electrode ring is fully extended out of the sheath tip and naturally restores its preformed helical curve shape and maintains the maximum opening state (as shown in fig. 2).
S8, the control button 310 is pressed to enter the working state. The control knob 310 is rotated clockwise until the mapping ring 230 is fully closed, at which point the control knob 310 is adjusted clockwise to a maximum.
S9, when the ring mapping portion 230 is in the completely closed state, the three-dimensional modeling operation of the target cardiac chamber is completed (as shown in fig. 1).
S10, when a tubular structure, such as a pulmonary vein opening, needs to be mapped finely, the ring-mapping portion 230 is first operated in a fully closed-loop state into the pulmonary vein. After the depth of the mapping ring 230 is adjusted to a predetermined position, the control knob 310 is rotated in a reverse clock direction, and the mapping ring 230 is opened to a proper size to start mapping. When the mapping catheter 100 is rotated clockwise, on the one hand, the contact quality of the electrodes can be improved, and on the other hand, the circular mapping of the tubular structure can be completed in cooperation with the bending adjustment of the circular mapping portion 230.
S11, the mapping catheter 100 may be rotated either clockwise or counterclockwise when the annular mapping portion 230 is in the fully closed state.
S12, the mapping catheter 100 can only be rotated clockwise when the annular mapping portion 230 is in the open state.
S13, when the mapping catheter 100 needs to be moved forward or backward, the annular mapping portion 230 is preferably pre-adjusted to a fully closed state.
S14, when the mapping curved rod 20 needs to be retracted into the sheath, the mapping catheter 100 is retracted first until the tail of the sheath reveals the third depth mark of the mapping catheter 100. At this point, the mapping curved shaft 20 is in close proximity to the sheath tip.
S15, the control button 310 is pulled out and put into a ready state.
S16, holding the sheath end with one hand, and retracting the mapping catheter 100 with the other hand until the second depth marker is revealed. At this point, the mapping curved shaft 20 is fully straightened and advanced into the sheath tip.
S17, the mapping catheter 100 continues to be withdrawn until the first depth marker is revealed. At this time, the mapping curved rod 20 is located at the tail of the sheath in a straight shape.
S18, the head end of the guide sleeve 40 is advanced to enter the tail part of the sheath.
S19, grasp the guiding sleeve 40 with one hand, and withdraw the mapping catheter 100 with the other hand until the curved marking shaft is seen from the tail of the guiding sleeve 40.
S20, synchronously withdrawing the mapping catheter 100 and the guide sleeve 40. At this time, the mapping curved shaft 20 is located in the guiding sleeve 40 in a straight state.
In summary, the mapping catheter 100 proposed by the present invention has the following advantages:
the annular mapping portion 230 of the distal end of the mapping catheter 100 is adjustable in opening and closing, suitable for mapping procedures for different sites and different targets. The cyclic mapping portion 230 can rotate bi-directionally in the heart chamber, and effectively avoids the problems of hooking, winding, damage and the like caused by the fact that the mapping catheter 100 is inserted into an intracardiac structure due to an open loop. The diameter of the annular mapping part 230 can be adjusted, when the blood vessel with different diameters is entered, the diameter of the electrode ring can be adjusted, and the contact quality of the mapping electrode and the inner wall of the blood vessel is improved.
Moreover, in the moving mapping process, the ring mapping part 230 is in a completely closed state, so that deformation is not easy to cause, and the accuracy of mapping and positioning is ensured. When the cyclic mapping part 230 needs to be operated to enter special structures such as blood vessels or auricles, the cyclic mapping catheter can be operated to enter the vessels or auricles in any forward or reverse rotation mode, the operation technology is simplified, the in-place failure rate is reduced, the difficulty in learning and training is reduced, the operation efficiency is obviously improved, the accumulation effect of the number of unidirectional rotation turns of the existing cyclic mapping catheter 100 in the operation process is overcome, meanwhile, the catheter can be rotated reversely at any time, the winding of the extension lead at the tail end of the catheter is loosened, and the fine control of a surgeon on the catheter and the coordination and matching of the extension lead and peripheral instruments are effectively guaranteed.
In addition, when the catheter is advanced and retracted, the mapping portion 230 does not deform and move slowly because the mapping portion 230 is in a fully closed state, which improves the contact stability and operation speed of the mapping electrode pair 210.
While the invention has been described in connection with specific embodiments thereof, it is to be understood that it is intended by the appended drawings and description that the invention may be embodied in other specific forms without departing from the spirit or scope of the invention.
Claims (10)
1. A mapping catheter for detection and treatment of a cardiac site, the mapping catheter comprising:
a catheter body having a distal end and a proximal end;
the mapping curved rod is connected to the distal end part, and a plurality of pairs of mapping electrode pairs for acquiring the electric signals of the heart part are arranged on the mapping curved rod;
when the mapping curved shaft is in a mapping state, a portion of the mapping curved shaft forms a closed annular mapping portion; when the mapping curved rod is in the accommodating state, the mapping curved rod is in a straightened state and has the same extending direction as the catheter body.
2. The mapping catheter of claim 1, further comprising: a control assembly, the control assembly comprising:
a control knob disposed at the proximal end portion;
the first traction wire is connected between the free end of the mapping curved rod and the control button, and when mapping is performed, the control button controls the mapping curved rod to move through the first traction wire so as to form the annular mapping part.
3. The mapping catheter of claim 2, wherein the control knob switches between a first operational state and a second operational state,
when the control knob is in the first working state, the first traction wire is in a loose state;
when the control knob is in the second working state, the control knob is matched with the first traction wire, and when the control knob is rotated in a first direction, the mapping bending rod moves towards the trend of closing the annular detection part under the action of the first traction wire; when the control knob is rotated in a second direction, the mapping bending rod moves towards the trend of opening the annular detection part under the action of elastic restoring force;
wherein the direction of rotation of the first direction is opposite to the direction of rotation of the second direction.
4. The mapping catheter of claim 2, further comprising:
a guide sleeve slidably disposed over the catheter body, the guide sleeve straightening and receiving the mapping curved shaft into the guide sleeve when the guide sleeve is slid over the catheter body toward the distal end portion.
5. The mapping catheter of claim 4, wherein the control assembly further comprises:
the control handle is arranged at the proximal end part;
a second pull wire connected between the control handle and the distal end portion, the control handle controlling bending and straightening of the distal end portion of the catheter body via the second pull wire.
6. The mapping catheter of claim 1, wherein the plane of the annular mapping portion is perpendicular to the direction of extension of the catheter body when the mapping catheter is in the mapping state.
7. The mapping catheter of claim 1, wherein a plurality of pairs of the mapping electrode pairs are equally spaced on the mapping curved shaft.
8. The mapping catheter of claim 1, wherein a plurality of positioning chips are further disposed on the mapping curved shaft for positioning.
9. The mapping catheter of claim 8, wherein one of the positioning chips is disposed on the mapping curved shaft adjacent to each pair of the mapping electrode pairs.
10. The mapping catheter of any one of claims 1-9, wherein the mapping curved shaft is a pre-formed helically curved flexible tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010741452.0A CN111789588A (en) | 2020-07-29 | 2020-07-29 | Mapping catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010741452.0A CN111789588A (en) | 2020-07-29 | 2020-07-29 | Mapping catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111789588A true CN111789588A (en) | 2020-10-20 |
Family
ID=72827977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010741452.0A Pending CN111789588A (en) | 2020-07-29 | 2020-07-29 | Mapping catheter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111789588A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116965908A (en) * | 2023-06-27 | 2023-10-31 | 上海玮启医疗器械有限公司 | Intracardiac mapping electrode catheter |
-
2020
- 2020-07-29 CN CN202010741452.0A patent/CN111789588A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116965908A (en) * | 2023-06-27 | 2023-10-31 | 上海玮启医疗器械有限公司 | Intracardiac mapping electrode catheter |
| CN116965908B (en) * | 2023-06-27 | 2024-04-09 | 上海玮启医疗器械有限公司 | Intracardiac mapping electrode catheter |
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