Catheter with multi-functional control handle having rotational mechanism

摘要

A catheter for use in a patient's heart, especially for mapping a tubular region of the heart, has a catheter body, a deflectable intermediate section and a distal mapping assembly that has a generally circular portion adapted to sit on or in a tubular region of the heart. A control handle of the catheter allows for single-handed manipulation of various control mechanisms that can deflect the intermediate section and contract the mapping assembly by means of a deflection control assembly and a rotational control assembly. The deflection control assembly has a deflection arm and a rocker member. The rotational control assembly has an outer rotational member, an inner rotational member and a cam. A pair of puller members are responsive to the deflection control assembly to bi-directionally deflect the intermediate section. A third puller member is responsive to the rotational control assembly to contract the generally circular portion of the mapping assembly.

主权项

1. A catheter comprising:
a catheter body; a deflectable intermediate section distal the catheter body; a mapping assembly distal the intermediate section, the mapping assembly having a generally circular portion; a control handle proximal the catheter body, the control handle having:
a control handle housing;a deflection control assembly; anda rotational control assembly having an outer rotational member, an inner rotational member and a cam, the outer rotational member being in rotational engagement with the inner rotational member, the inner rotational member surrounding and being rotatably mounted on at least a portion of the cam, the cam being fixed to the control handle housing; first and second puller members responsive to the deflection control assembly adapted to deflect the intermediate section; and a third puller member responsive to the rotational control assembly, a proximal end of the third puller member anchored to the rotational control assembly such that rotation of the outer rotational member in a first direction moves the third puller member proximally to contract the generally circular portion of the mapping assembly and rotation of the outer rotational member in a second direction opposite the first direction moves the third puller member distally to expand the generally circular portion of the mapping assembly.