Patent ID: 8900193

Claim:
A transseptal medical device, comprising: a dilator having a proximal end and a distal end; a needle disposed within the dilator, the needle having a proximal end and a distal end; and a needle control mechanism operably connected to at least one of the proximal end of the needle and the dilator for selective adjustment of the distal end of the needle from a first position within the dilator to a second position external to the dilator, wherein the needle control mechanism comprises the following: a latch, the latch including a portion external to the dilator; an actuator configured for engagement with the latch, wherein the actuator is configured to undergo a predetermined amount of rotation while making intermittent contact with the needle; wherein the actuator is configured to engage the latch in a first actuator orientation and is configured to avoid engagement with the latch in a second actuator orientation following at least part of the predetermined amount of rotation of the actuator; and a torsion spring for rotating the actuator.