Systems for deploying medical diagnostics and/or therapy and delivery tools thereof

A system for deploying medical diagnostics and/or therapy, the system comprising an implantable medical device including an elongate body for delivery of the therapy therethrough and a helix fixation element coupled to the body, and a delivery tool for implanting the elongate body, the delivery tool comprising:

• a deployment member comprising a tubular sidewall and an elastic cantilever element, the tubular sidewall defining an elongate lumen of the deployment member that extends along a longitudinal axis of the tool, from a proximal opening of the lumen to a distal opening of the lumen, the lumen being configured to receive passage of the elongate body therethrough, and the elastic cantilever element being secured to the tubular sidewall in proximity to the distal opening of the lumen, the cantilever element being spring biased to extend outward from the sidewall, in a direction approximately orthogonal to the longitudinal axis, and being formed to bend inward around the longitudinal axis of the tool, from where the element is secured to the tubular sidewall;
• and
• a sheath including a tubular sidewall, the sheath sidewall defining an elongate lumen of the sheath that extends along the longitudinal axis of the tool, from a proximal opening of the sheath lumen to a distal opening of the sheath lumen, the sheath lumen being configured to receive passage of both the tubular sidewall of the deployment member and the elastic cantilever element of the deployment member therethrough, the cantilever element, when received within the sheath lumen, being pushed inward by the sheath sidewall, against the spring bias thereof, to bend around the tool axis;
• and
• wherein the elastic cantilever element of the deployment member, when bending around the longitudinal axis of the tool, has a radius of curvature that approximately conforms to a curvature of an outer surface of the tubular sidewall of the deployment member.