Medical device control handle with multiple puller wires

Abstract

A medical device control handle or catheter includes deflection assembly and at least one of the following: a disk actuator, a lever actuator and a ring actuator for actuating additional puller wires in manipulation of multiple features of the medical device or catheter independently of each other. The disk actuator has a common rotational axis with but is rotationally independent of the deflection assembly. The lever actuator has a separate rotational axis. The ring is mounted outside of the control handle and rotatable relative to the control handle to actuate another puller wire for manipulating another feature of the catheter. Each of the disk, lever and ring actuators are of a design that allows existing control handles and catheters to be readily modified to include these actuators.

What is claimed is: 
     
         1 . An electrophysiological catheter, comprising:
 an elongated catheter body connected to a distal assembly;   a control handle defining a longitudinal axis, the control handle including a deflection assembly comprising:
 a pulley arm adapted for rotation about a first rotational axis that is generally perpendicular to the longitudinal axis of the control handle, the pulley arm having a first radial bearing formation and a second radial bearing formation; 
 a deflection actuator coupled to the first radial bearing formation; and 
 a tension adjustment assembly coupled to the second radial bearing formation. 
   
     
     
         2 . The electrophysiological catheter of  claim 1 , in which the tension adjustment assembly comprises:
 a locking plate comprising a guiding groove and a through hole having a polygonal shape; and   a dial comprising a prong that extends through the guiding groove of the locking plate.   
     
     
         3 . The electrophysiological catheter of  claim 2 , in which the tension adjustment assembly further comprises:
 a tension cap screw;   a washer, configured to be compressed against the pulley arm from a compression load applied by the tension cap screw to the washer; and   a retaining nut also having the polygonal shape, such that the retaining nut is lockable with the through hole of the locking plate when the compression load is applied by the tension cap screw.   
     
     
         4 . The electrophysiological catheter of  claim 3 , further comprising a plurality of puller wires extending from the control handle and through at least the elongated catheter body to the distal assembly. 
     
     
         5 . The electrophysiological catheter of  claim 4 , in which at least a first of the plurality of puller wires is coupled to the pulley arm such that rotation of the pulley arm actuates the first of the plurality of puller wires. 
     
     
         6 . The electrophysiological catheter of  claim 5 , in which the control handle further includes a disk actuator comprising a disk-shaped body adapted for rotation about the first rotational axis, a second of the plurality of puller wires being coupled to the disk actuator, such that rotation of the disk actuator actuates the second of the plurality of puller wires to manipulate the distal section. 
     
     
         7 . The electrophysiological catheter of  claim 6 , in which the disk actuator is positioned on the first radial bearing formation such that a rotation of the disk actuator wraps the second of the plurality of puller wires on the first radial bearing formation. 
     
     
         8 . The electrophysiological catheter of  claim 7 , in which the disk actuator comprises a first disk actuator. 
     
     
         9 . The electrophysiological catheter of  claim 8 , further comprising a second disk actuator adapted for rotation about the first rotational axis, a third of the plurality of puller wires being coupled to the second disk actuator, such that rotation of the second disk actuator actuates the third of the plurality of puller wires to manipulate the distal section. 
     
     
         10 . The electrophysiological catheter of  claim 6 , further comprising a lever actuator comprising an outer end extending through an opening in the housing, the lever actuator adapted for rotation about a second rotational axis by the user, the second rotational axis being generally parallel with the longitudinal axis of the control handle, a fourth of the plurality of puller wires being coupled to the lever actuator such that rotation of the lever actuator actuates the fourth of the plurality of puller wires to manipulate the distal assembly. 
     
     
         11 . The electrophysiological catheter of  claim 10 , further comprising a ring actuator mounted on the control handle and adapted for rotation about the longitudinal axis of the control handle, a fifth of the plurality of puller wires being coupled to the ring actuator such that rotation of the ring actuator actuates the fifth puller wire to manipulate the distal assembly. 
     
     
         12 . The electrophysiological catheter of  claim 11 , in which the pulley arm, the lever actuator, the ring actuator, the first disk actuator, and the second disk actuator are rotationally independent of each other. 
     
     
         13 . The electrophysiological catheter of  claim 11 , in which the pulley arm has a main body and the first disk actuator is positioned between the main body and the housing of the control handle. 
     
     
         14 . The electrophysiological catheter of  claim 11 , in which the lever actuator further comprises an inner end connected to a pin disposed inside the housing. 
     
     
         15 . The electrophysiological catheter of  claim 14 , in which the fourth of the plurality of puller wires extends about the pin. 
     
     
         16 . The electrophysiological catheter of  claim 14 , in which the opening includes at least two edges that limit a range of rotation of the lever actuator. 
     
     
         17 . The electrophysiological catheter of  claim 11 , in which a rotation of the ring actuator wraps the fifth of the plurality of puller wires around the control handle. 
     
     
         18 . The electrophysiological catheter of  claim 17 , in which the housing includes an aperture and a proximal portion of the fifth of the plurality of puller wires extends through the aperture and is anchored to the ring actuator. 
     
     
         19 . The electrophysiological catheter of  claim 8 , in which the first disk actuator comprises a tab and an enlarged handle mounted on the tab. 
     
     
         20 . The electrophysiological catheter of  claim 19 , in which the tab extends from the disk-shaped body and through a slot in the housing.