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Treatment catheter member with encircling function

  • US 9,770,332 B2
  • Filed: 03/05/2013
  • Issued: 09/26/2017
  • Est. Priority Date: 03/06/2012
  • Status: Active Grant
First Claim
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1. Catheter member for interacting with a circumferential tissue structure comprising:

  • an elongate primary catheter which has at least one inner lumen and which extends along a longitudinal axis and has a distal end portion,first and second elongate secondary catheters each extending along a longitudinal axis, each comprising a distal end portion and a proximal end portion and an inner lumen, and each comprising a secondary alignment portion, which is located between the distal and proximal end portions and adjacent to the distal end portion, and each positionable in an inner lumen of the primary catheter to be moveable relatively thereto and exposable therefrom,first and second elongate tertiary catheters to be guided by the first and second secondary catheters, respectively, each extending along a longitudinal axis and each comprising a distal end portion and a proximal end portion, the first and second elongate tertiary catheters being moveable relatively to the first and second secondary catheters, respectively, and exposable from the respective distal end portion of the first and second secondary catheters,a first flexing mechanism to provide the distal end portion of the first and/or second secondary catheter with a tendency to assume a first secondary bent shape, anda second flexing mechanism to provide the secondary alignment portion of the first and/or second secondary catheter with a tendency to assume a second secondary bent shape,wherein the distal end portion of at least one of the first and second secondary catheters is configured to be able to be flexed by the first flexing mechanism to form an arm portion substantially transverse to the direction of the longitudinal axis of the primary catheter so as to assume the first secondary bent shape, when being exposed from the distal end portion of the primary catheter,wherein the secondary alignment portion of at least one of the first and second secondary catheters is configured to be able to be flexed by the second flexing mechanism to assume the second secondary bent shape having a predetermined curvature, optionally with a radius of substantially 30 to 70 mm and optionally describing an angle of 90°

    to 270°

    , andwherein the arm portions of the first and second secondary catheters, respectively, extend in generally opposite directions to each other when the secondary alignment portions of the first and second secondary catheters assume the second secondary bent shape in parallel to each other,wherein the first and second tertiary catheters each comprises an inner lumen,wherein a wire having a free distal end is provided in the inner lumen of the first tertiary catheter, and a catching wire is provided in the inner lumen of the second tertiary catheter, andwherein a strength of the wire and/or the catching wire is higher than a strength of the distal end portion of the first and/or second tertiary catheter so that the wire and/or catching wire unwinds a coil shape of the distal end portion when forwarded through the first and/or second tertiary catheter.

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