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US5741214A Expired / Lapsed US ⏱️ 0.0 years remaining

Accessory pathway detecting/cauterizing apparatus

Assignee: Terumo Corp
•
Filing: 1994-12-19
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Granted: 1998-04-21
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Expires: 2014-12-19
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Abstract

Abstract An accessory pathway detecting apparatus measures action potentials from first and second electrode leads, and outputs the obtained action potentials, as potential maps, to a CRT or a printer such that the action potentials can be displayed in the form of a list. An ablation catheter is inserted and located at a preexcitation portion obtained from the display, and the impedance between each of the electrodes of the first and second electrode leads and the electrode of the ablation catheter is measured by an impedance measuring circuit. A point where the lowest impedance is measured is regarded as an accessory pathway portion. The ablation catheter is fixed at this point.

Inventors

  • 👤 Teruhiko Ouchi
  • 👤 Kunimasa Katayama

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 18:17
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/68; A61B5/6846; A61B5/6847; A61B5/6852; A61B5/6855; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1492; A61B5/05; A61B5/053; A61B5/0538; A61B5/24; A61B5/25; A61B5/279; A61B5/28; A61B5/283; A61B5/287; A61B5/30; A61B5/307; A61B5/308; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61B2018/00053; A61B2018/00059; A61B2018/00071; A61B2018/00083; A61B2018/00107; A61B2018/00148; A61B2018/00172; A61B2018/00178; A61B2018/00315; A61B2018/00345; A61B2018/00351; A61B2018/00357; A61B2018/00571; A61B2018/00577; A61B2018/00636; A61B2018/00773; A61B2018/00875; A61B2562/00; A61B2562/04; A61B2562/043

Claims Analysis

Total Claims: 50
Claim 1
Independent Claim 147 words
An accessory pathway detecting apparatus for detecting an accessory pathway in an object to be tested, comprising: a first electrode member having a plurality of electrodes located along a longitudinal extent of the first electrode member, said first electrode member having a wire shape capable of being inserted in a coronary sinus to acquire action potentials at a plurality of locations along the coronary sinus; a second electrode member having a plurality of electrodes located along a longitudinal extent of said second electrode member, said second electrode member having a wire-like shape capable of being inserted in a coronary artery to acquire action potentials at a plurality of locations along the coronary artery; measuring means for simultaneously measuring the action potentials at the plurality of locations by using said first and second electrode members; and output means for visually outputting measurement results obtained by said measuring means.
Claim 2
Dependent Claim 147 words
An accessory pathway detecting apparatus for detecting an accessory pathway in an object to be tested, comprising: a first electrode member having a plurality of electrodes located along a longitudinal extent of the first electrode member, said first electrode member having a wire shape capable of being inserted in a coronary sinus to acquire action potentials at a plurality of locations along the coronary sinus; a second electrode member having a plurality of electrodes located along a longitudinal extent of said second electrode member, said second electrode member having a wire-like shape capable of being inserted in a coronary artery to acquire action potentials at a plurality of locations along the coronary artery; measuring means for simultaneously measuring the action potentials at the plurality of locations by using said first and second electrode members; and output means for visually outputting measurement results obtained by said measuring means.
Claim 3
Dependent Claim 23 words
The apparatus according to claim 1, wherein said output means outputs data displayed on a display on the basis of the measurement results.
Claim 4
Dependent Claim 28 words
The apparatus according to claim 1, wherein said output means outputs data printed on a recording medium by a printing unit on the basis of the measurement results.
Claim 5
Dependent Claim 22 words
The apparatus according to claim 1, wherein said output means stores data based on the measurement results in a data storage media.
Claim 6
Dependent Claim 44 words
The apparatus according to claim 1, wherein the plurality of electrodes of each of said first and second electrode members are insulated from each other and arranged at predetermined intervals on a distal end portion of each of said first and second electrode members.
Claim 7
Dependent Claim 18 words
The apparatus according to claim 1, wherein said first electrode member is in a shape of a catheter.
Claim 8
Dependent Claim 19 words
The apparatus according to claim 1, wherein said second electrode member is in a shape of a guide wire.
Claim 9
Dependent Claim 41 words
The apparatus according to claim 1, wherein said second electrode member is in a shape of a guide wire and has physical characteristics equivalent to those of a PTCA guide wire in terms of at least wire diameter and elastic force.
Claim 10
Dependent Claim 48 words
The apparatus according to claim 1, wherein said first electrode member has a diameter small enough to allow said member to be inserted in a coronary sinus, and said second electrode member has a diameter small enough to allow said member to be inserted in a coronary artery.
Claim 11
Dependent Claim 18 words
The apparatus according to claim 1, further comprising pacing means for giving an electrical stimulus to the object.
Claim 12
Dependent Claim 33 words
The apparatus according to claim 10, wherein said pacing means is adapted to be inserted in a predetermined portion in the object to give the object a stimulus pulse for an electrophysiological test.
Claim 13
Dependent Claim 40 words
The apparatus according to claim 10, wherein the measurement results obtained by said measuring means indicate a conduction time taken to conduct an electrical stimulus given by said pacing means to each electrode of said first and second electrode members.
Claim 14
Dependent Claim 111 words
An accessory pathway detecting apparatus for detecting an accessory pathway in an object to be tested, comprising: a first electrode member having a plurality of electrodes insulated from each other and having a shape capable of being inserted in the object; action potential measuring means for simultaneously measuring action potentials at a plurality of locations by using the plurality of electrodes of said first electrode member; a second electrode member having a shape capable of being inserted in the object and having an electrode at a predetermined position; and measuring means for measuring an impedance between each electrode of said first electrode member and the electrode of said second electrode member.
Claim 15
Dependent Claim 111 words
An accessory pathway detecting apparatus for detecting an accessory pathway in an object to be tested, comprising: a first electrode member having a plurality of electrodes insulated from each other and having a shape capable of being inserted in the object; action potential measuring means for simultaneously measuring action potentials at a plurality of locations by using the plurality of electrodes of said first electrode member; a second electrode member having a shape capable of being inserted in the object and having an electrode at a predetermined position; and measuring means for measuring an impedance between each electrode of said first electrode member and the electrode of said second electrode member.
Claim 16
Dependent Claim 43 words
The apparatus according to claim 13, wherein said first electrode member is in a shape of a wire, and the plurality of electrodes on said first electrode member are arranged at predetermined intervals on a distal end portion of said first electrode member.
Claim 17
Dependent Claim 82 words
The apparatus according to claim 13, wherein said measuring means comprises: selecting means for selecting at least one of the plurality of electrodes of said first electrode member, applying means for applying a predetermined voltage between the selected electrode and the electrode of said second electrode member, and detecting means for detecting a current generated on the basis of the applied voltage, wherein an impedance is acquired on the basis of the predetermined voltage and the current detected by said detecting means.
Claim 18
Dependent Claim 25 words
The apparatus according to claim 15, further comprising notification means for performing notification on the basis of an impedance value obtained by said measuring means.
Claim 19
Dependent Claim 23 words
The apparatus according to claim 16, wherein said notification means notifies an impedance measured by said measuring means by means of a sound.
Claim 20
Dependent Claim 17 words
The apparatus according to claim 13, wherein said second electrode member is constituted by an ablation catheter.
Claim 21
Dependent Claim 135 words
An accessory pathway cauterizing apparatus for detecting and cauterizing an accessory pathway in an object to be tested, comprising: a first electrode having a shape capable of being inserted in a first portion of the object and having a plurality of electrodes insulated from each other; a second electrode having a shape capable of being inserted in a second portion of the object and having a plurality of electrodes insulated from each other; action potential measuring means for simultaneously measuring action potentials at a plurality of locations by using the plurality of electrodes of said first and second electrode members; an ablation catheter having an electrode arranged at a predetermined position; and measuring means for measuring an impedance between each electrode of said first and second electrode members and the electrode of said ablation catheter.
Claim 22
Dependent Claim 135 words
An accessory pathway cauterizing apparatus for detecting and cauterizing an accessory pathway in an object to be tested, comprising: a first electrode having a shape capable of being inserted in a first portion of the object and having a plurality of electrodes insulated from each other; a second electrode having a shape capable of being inserted in a second portion of the object and having a plurality of electrodes insulated from each other; action potential measuring means for simultaneously measuring action potentials at a plurality of locations by using the plurality of electrodes of said first and second electrode members; an ablation catheter having an electrode arranged at a predetermined position; and measuring means for measuring an impedance between each electrode of said first and second electrode members and the electrode of said ablation catheter.
Claim 23
Dependent Claim 56 words
The apparatus according to claim 19, wherein each of said first and second electrode members is in a shape of a wire, and the plurality of electrodes insulated from each other and used to acquire a plurality of action potentials are arranged at predetermined intervals at a distal end portion of each of said electrode members.
Claim 24
Dependent Claim 18 words
The apparatus according to claim 20, wherein said first electrode member is in a shape of a catheter.
Claim 25
Dependent Claim 19 words
The apparatus according to claim 20, wherein said second electrode member is in a shape of a guide wire.
Claim 26
Dependent Claim 41 words
The apparatus according to claim 20, wherein said second electrode member is in a shape of a guide wire and has physical characteristics equivalent to those of a PTCA guide wire in terms of at least wire diameter and elastic force.
Claim 27
Dependent Claim 48 words
The apparatus according to claim 20, wherein said first electrode member has a diameter small enough to allow said member to be inserted in a coronary sinus, and said second electrode member has a diameter small enough to allow said member to be inserted in a coronary artery.
Claim 28
Dependent Claim 24 words
The apparatus according to claim 19, wherein the electrode of said ablation catheter is arranged on a distal end portion of said ablation catheter.
Claim 29
Dependent Claim 81 words
The apparatus according to claim 19, wherein said measuring means comprises selecting means for selecting at least one of the plurality of electrodes of said first electrode member, applying means for applying a predetermined voltage between the selected electrode and the electrode of said ablation catheter, and detecting means for detecting a current generated on the basis of the applied voltage, wherein an impedance is acquired on the basis of the predetermined voltage and the current detected by said detecting means.
Claim 30
Dependent Claim 25 words
The apparatus according to claim 26, further comprising notification means for performing notification on the basis of an impedance value obtained by said measuring means.
Claim 31
Dependent Claim 23 words
The apparatus according to claim 27, wherein said notification means notifies an impedance measured by said measuring means by means of a sound.
Claim 32
Dependent Claim 196 words
An accessory pathway detecting apparatus for detecting an accessory pathway in a heart to be tested, comprising: a first electrode member having a plurality of electrodes located along a longitudinal extent of said first electrode member and insulated from each other, said first electrode member being in a shape of a wire and being capable of being inserted in a coronary sinus of the heart; a second electrode member having a plurality of electrodes located along a longitudinal extent of the second electrode member and insulated from each other, said second electrode member being in the shape of a wire and being capable of being inserted in a coronary artery of the heart; a third electrode member having a shape capable of being inserted in the heart and having an electrode at a predetermined position; first measuring means for simultaneously measuring action potentials at a plurality of locations by using said first and second electrode members; output means for visually outputting results obtained by said first measuring means; and second measuring means for measuring an impedance between each of the electrodes of said first and second electrode members and the electrode of said third electrode member.
Claim 33
Dependent Claim 196 words
An accessory pathway detecting apparatus for detecting an accessory pathway in a heart to be tested, comprising: a first electrode member having a plurality of electrodes located along a longitudinal extent of said first electrode member and insulated from each other, said first electrode member being in a shape of a wire and being capable of being inserted in a coronary sinus of the heart; a second electrode member having a plurality of electrodes located along a longitudinal extent of the second electrode member and insulated from each other, said second electrode member being in the shape of a wire and being capable of being inserted in a coronary artery of the heart; a third electrode member having a shape capable of being inserted in the heart and having an electrode at a predetermined position; first measuring means for simultaneously measuring action potentials at a plurality of locations by using said first and second electrode members; output means for visually outputting results obtained by said first measuring means; and second measuring means for measuring an impedance between each of the electrodes of said first and second electrode members and the electrode of said third electrode member.
Claim 34
Dependent Claim 207 words
An accessory pathway detecting apparatus for detecting and cauterizing an accessory pathway in an object to be tested, comprising: a first electrode member having a plurality of electrodes located along a longitudinal extent of the first electrode member and insulated from each other, said first electrode member being in a shape of a wire and being capable of being inserted in a coronary sinus of the heart; a second electrode member having a plurality of electrodes located along a longitudinal extent of the second electrode member and insulated from each other, said second electrode member being in a shape of a wire and being capable of being inserted in a coronary artery of the heart; an ablation catheter having a shape capable of being inserted in the heart and having an electrode at a predetermined position; first measuring means for simultaneously measuring action potentials at pluralities of locations by using said first and second electrode members; output means for visually outputting results obtained by said first measuring means such that the results are displayed in the form of a list; and second measuring means for measuring an impedance between each of the electrodes of said first and second electrode members and the electrode of said ablation catheter.
Claim 35
Dependent Claim 207 words
An accessory pathway detecting apparatus for detecting and cauterizing an accessory pathway in an object to be tested, comprising: a first electrode member having a plurality of electrodes located along a longitudinal extent of the first electrode member and insulated from each other, said first electrode member being in a shape of a wire and being capable of being inserted in a coronary sinus of the heart; a second electrode member having a plurality of electrodes located along a longitudinal extent of the second electrode member and insulated from each other, said second electrode member being in a shape of a wire and being capable of being inserted in a coronary artery of the heart; an ablation catheter having a shape capable of being inserted in the heart and having an electrode at a predetermined position; first measuring means for simultaneously measuring action potentials at pluralities of locations by using said first and second electrode members; output means for visually outputting results obtained by said first measuring means such that the results are displayed in the form of a list; and second measuring means for measuring an impedance between each of the electrodes of said first and second electrode members and the electrode of said ablation catheter.
Claim 36
Dependent Claim 56 words
The apparatus according to claim 30, wherein said ablation catheter has an electrode for generating an electrical stimulus, and the measurement results obtained by said first measuring means indicate a conduction time taken to conduct an electrical stimulus generated by said ablation catheter to a position of each electrode of said first and second electrode members.
Claim 37
Independent Claim 157 words
The method of detecting an accessory pathway in an object to be tested, comprising the steps of: inserting a first electrode member in a coronary sinus of a heart, said first electrode member being in a shape of a wire and having a plurality of electrodes located along a longitudinal extent of the first electrode member, said first electrode member being adapted to acquire action potentials at a plurality of locations along the coronary sinus; inserting a second electrode member in a coronary artery of the heart, said second electrode member having a wire shape and a plurality of electrodes located along a longitudinal extent of the second electrode member, said second electrode member being adapted to acquire action potentials at a plurality of locations along the coronary artery; simultaneously measuring the action potentials at the plurality of locations by using said first and second electrode members; and visually outputting measurement results obtained in said measuring step.
Claim 38
Independent Claim 157 words
The method of detecting an accessory pathway in an object to be tested, comprising the steps of: inserting a first electrode member in a coronary sinus of a heart, said first electrode member being in a shape of a wire and having a plurality of electrodes located along a longitudinal extent of the first electrode member, said first electrode member being adapted to acquire action potentials at a plurality of locations along the coronary sinus; inserting a second electrode member in a coronary artery of the heart, said second electrode member having a wire shape and a plurality of electrodes located along a longitudinal extent of the second electrode member, said second electrode member being adapted to acquire action potentials at a plurality of locations along the coronary artery; simultaneously measuring the action potentials at the plurality of locations by using said first and second electrode members; and visually outputting measurement results obtained in said measuring step.
Claim 39
Dependent Claim 34 words
The method according to claim 32, further comprising the step of inserting a third electrode member in the heart, said third electrode member having an electrode for giving an electrical stimulus to the object.
Claim 40
Independent Claim 99 words
A method of detecting an accessory pathway in an object to be tested, comprising the steps of: inserting a first electrode member in the object, said first electrode member having a plurality of electrodes insulated from each other; simultaneously measuring action potentials at a plurality of locations by using the plurality of electrodes of said first electrode member; inserting a second electrode member in the object; said second electrode member having an electrode at a predetermined position; and measuring an impedance between each of the electrodes of said first electrode member and the electrode of said second electrode member.
Claim 41
Independent Claim 99 words
A method of detecting an accessory pathway in an object to be tested, comprising the steps of: inserting a first electrode member in the object, said first electrode member having a plurality of electrodes insulated from each other; simultaneously measuring action potentials at a plurality of locations by using the plurality of electrodes of said first electrode member; inserting a second electrode member in the object; said second electrode member having an electrode at a predetermined position; and measuring an impedance between each of the electrodes of said first electrode member and the electrode of said second electrode member.
Claim 42
Independent Claim 155 words
A method of detecting and cauterizing an accessory pathway in an object to be tested, comprising the steps of: inserting a first electrode member in a first portion of the object, said first electrode member having a plurality of electrodes insulated from each other; inserting a second electrode member in a second portion of the object, said second electrode member having a plurality of electrodes insulated from each other; simultaneously measuring action potentials at a plurality of locations by using the plurality of electrodes of said first and second electrode members; inserting an ablation catheter having an electrode arranged at a predetermined position into the object and measuring an impedance between each of the electrodes of said first and second electrode members and the electrode of said ablation catheter; and specifying an accessory pathway portion on the basis of measurement results of the impedances, and cauterizing the accessory pathway portion by using said ablation catheter.
Claim 43
Independent Claim 155 words
A method of detecting and cauterizing an accessory pathway in an object to be tested, comprising the steps of: inserting a first electrode member in a first portion of the object, said first electrode member having a plurality of electrodes insulated from each other; inserting a second electrode member in a second portion of the object, said second electrode member having a plurality of electrodes insulated from each other; simultaneously measuring action potentials at a plurality of locations by using the plurality of electrodes of said first and second electrode members; inserting an ablation catheter having an electrode arranged at a predetermined position into the object and measuring an impedance between each of the electrodes of said first and second electrode members and the electrode of said ablation catheter; and specifying an accessory pathway portion on the basis of measurement results of the impedances, and cauterizing the accessory pathway portion by using said ablation catheter.
Claim 44
Dependent Claim 22 words
The method according to claim 35, wherein the first portion is a coronary sinus, and the second portion is a coronary artery.
Claim 45
Independent Claim 200 words
A method of detecting an accessory pathway in an object to be tested, comprising the steps of: inserting a first electrode member in a coronary sinus of a heart, said first electrode member having a wire shape and a plurality of electrodes located along a longitudinal extent of the first electrode member and insulated from each other; inserting a second electrode member in a coronary artery of the heart, said second electrode member having a wire shape and a plurality of electrodes located along a longitudinal extent of the second electrode member and insulated from each other; simultaneously measuring action potentials at a plurality of locations of the coronary sinus and coronary artery by using said first and second electrode members; visually outputting measurement results obtained in said measuring step so that an accessory pathway portion can be recognized by the output; inserting a third electrode member having an electrode into the heart to a position near the recognized accessory pathway portion; and specifying the accessory pathway portion by measuring an impedance between an electrode, of the electrodes of said first and second electrode members, located near the recognized accessory pathway portion and the electrode of said third electrode member.
Claim 46
Independent Claim 200 words
A method of detecting an accessory pathway in an object to be tested, comprising the steps of: inserting a first electrode member in a coronary sinus of a heart, said first electrode member having a wire shape and a plurality of electrodes located along a longitudinal extent of the first electrode member and insulated from each other; inserting a second electrode member in a coronary artery of the heart, said second electrode member having a wire shape and a plurality of electrodes located along a longitudinal extent of the second electrode member and insulated from each other; simultaneously measuring action potentials at a plurality of locations of the coronary sinus and coronary artery by using said first and second electrode members; visually outputting measurement results obtained in said measuring step so that an accessory pathway portion can be recognized by the output; inserting a third electrode member having an electrode into the heart to a position near the recognized accessory pathway portion; and specifying the accessory pathway portion by measuring an impedance between an electrode, of the electrodes of said first and second electrode members, located near the recognized accessory pathway portion and the electrode of said third electrode member.
Claim 47
Independent Claim 210 words
A method of detecting and cauterizing an accessory pathway in an object to be tested, comprising the steps of: inserting a first electrode member in a coronary sinus of a heart, said first electrode member having a wire shape and a plurality of electrodes located along a longitudinal extent of the first electrode member and insulated from each other; inserting a second electrode member in a coronary artery of the heart, said second electrode member having a wire shape and plurality of electrodes located along a longitudinal extent of the second electrode member and insulated from each other; simultaneously measuring action potentials at a plurality of locations along the coronary sinus and coronary artery by using said first and second electrode members; visually outputting measurement results so that an accessory pathway portion in the heart can be recognized on the basis of the output; inserting and locating an ablation catheter at the accessory pathway portion, said ablation catheter having an electrode at a predetermined position; measuring an impedance between each of the electrodes of said first and second electrode members and the electrode of said ablation catheter, thereby detecting the accessory pathway portion accurately and fixing said ablation catheter; and cauterizing the accessory pathway portion by using said ablation catheter.
Claim 48
Independent Claim 210 words
A method of detecting and cauterizing an accessory pathway in an object to be tested, comprising the steps of: inserting a first electrode member in a coronary sinus of a heart, said first electrode member having a wire shape and a plurality of electrodes located along a longitudinal extent of the first electrode member and insulated from each other; inserting a second electrode member in a coronary artery of the heart, said second electrode member having a wire shape and plurality of electrodes located along a longitudinal extent of the second electrode member and insulated from each other; simultaneously measuring action potentials at a plurality of locations along the coronary sinus and coronary artery by using said first and second electrode members; visually outputting measurement results so that an accessory pathway portion in the heart can be recognized on the basis of the output; inserting and locating an ablation catheter at the accessory pathway portion, said ablation catheter having an electrode at a predetermined position; measuring an impedance between each of the electrodes of said first and second electrode members and the electrode of said ablation catheter, thereby detecting the accessory pathway portion accurately and fixing said ablation catheter; and cauterizing the accessory pathway portion by using said ablation catheter.
Claim 49
Independent Claim 238 words
A method of detecting and cauterizing an accessory pathway in an object to be tested, comprising the steps of: inserting a first electrode member in a coronary sinus of a heart, said first electrode member having a wire shape and a plurality of electrodes located along a longitudinal extent of the first electrode member and insulated from each other; inserting a second electrode member in a coronary artery of the heart, said second electrode member having a wire shape and a plurality of electrodes located along a longitudinal extent of the second electrode member and insulated from each other; inserting an ablation catheter in the heart, said ablation catheter having an electrode for generating a stimulus pulse and performing impedance measurement; measuring a conduction time of a stimulus pulse generated by said catheter by simultaneously measuring action potentials at a plurality of locations along the coronary artery and the coronary sinus by using said first and second electrode members; visually outputting measurement results so that an accessory pathway portion of the heart can be recognized on the basis of the output; moving said ablation catheter to the accessory pathway portion of the heart; measuring an impedance between each of the electrodes of said first and second electrode members and the electrode of said ablation catheter, thereby detecting the accessory pathway portion accurately and fixing said ablation catheter; and cauterizing the accessory pathway portion by using said ablation catheter.
Claim 50
Independent Claim 238 words
A method of detecting and cauterizing an accessory pathway in an object to be tested, comprising the steps of: inserting a first electrode member in a coronary sinus of a heart, said first electrode member having a wire shape and a plurality of electrodes located along a longitudinal extent of the first electrode member and insulated from each other; inserting a second electrode member in a coronary artery of the heart, said second electrode member having a wire shape and a plurality of electrodes located along a longitudinal extent of the second electrode member and insulated from each other; inserting an ablation catheter in the heart, said ablation catheter having an electrode for generating a stimulus pulse and performing impedance measurement; measuring a conduction time of a stimulus pulse generated by said catheter by simultaneously measuring action potentials at a plurality of locations along the coronary artery and the coronary sinus by using said first and second electrode members; visually outputting measurement results so that an accessory pathway portion of the heart can be recognized on the basis of the output; moving said ablation catheter to the accessory pathway portion of the heart; measuring an impedance between each of the electrodes of said first and second electrode members and the electrode of said ablation catheter, thereby detecting the accessory pathway portion accurately and fixing said ablation catheter; and cauterizing the accessory pathway portion by using said ablation catheter.

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