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Linkage steering mechanism for deflectable catheters
| Details |
Inventors: Mogul, Jamil;
Assignee: Mogul Enterprises, Inc. (San Jose, CA)
Primary Examiner: Lucchesi; Nicholas D.
Assistant Examiner: Bouchelle; Laura A.
Attorney, Agent or Firm: Buchanan Ingersoll & Rooney PC
A dual 4-bar linkage steering mechanism consists of four strip/rod-like prismatic or disk/sphere-like revolute side links, called, side link 1A, side link 1B, side link 2A and side link 2B; two strip/rod-like prismatic coupler links, called, coupler link A, coupler link B; and a common fixed link. In one option, the side link 1A and the side link 1B are integrated to act as a whole, and side link 2A and the side link 2B are also integrated to act as a whole. In other option, the side link 1A and the side link 1B are separate and move independently, and the side link 2A and the side link 2B are also separate and move independently. The coupler link A and coupler link B are either rigid or flexible. |
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DETAILED DESCRIPTION What is claimed is: 1.
A rotationally-actuated mechanism for deflectable catheters, comprising: a handle connected to a sheath of a deflectable catheter containing at least two mechanical catheter control wires each having a distal end affixed to a distal end portion of the catheter, and a proximal end; a linkage steering mechanism disposed within said handle and including first and second side links each having an engagement end and a first pivot end, said engagement ends extending outside of said handle for operative engagement by a user, said first pivot ends being pivotally affixed to a first pivot pin that is fixed relative to said handle, third and fourth side links each having a distal end and a second pivot end, the proximal ends of said third and fourth side links being respectively connected to a second pivot pin, and the distal ends of said third and fourth pivot links being respectively connected to the proximal ends of said control wires, and first and second coupler links respectively connecting said first side link to said third side link and said second side link to said fourth side link, whereby when said first side link is engaged and caused to rotate in a first direction about said first pivot pin, said first coupler link is translated and causes said third side link to rotate about said second pivot pin thereby causing the attached control wire to be translated within said sheath and the distal tip to be deflected in one direction from the tip's straight position to an arc angle in a plane, and wherein when said second side link is engaged and caused to rotate in the opposite direction about said first pivot pin, said second coupler link is translated and causes said fourth side link to rotate about said second pivot pin thereby causing the attached control wire to be translated within said sheath and brings the tip back to the straight position, while a further rotation of the second side link causes the tip to be further deflected in an opposite direction to an arc angle in the same plane
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