Systems, devices, and methods are provided for transseptal access of septa within a patient. The device can be advanced to a septum, e.g., towards a fossa ovalis. Instead of applying positive pressure to “tent” the septum, a negative pressure is applied to a lumen within a sheath, e.g., within an elongated member slidable within the sheath, via a negative pressure source such as a syringe on the proximal end of the sheath. This results in the septum pulling inward. The sheath employs a stationary needle-like central core component contained within the lumen of the sheath that punctures the septum when the same is pulled passed it by the negative pressure. The stationary needle-like central core component may be hollow and may form a portion of the elongated member or may be coupled to a distal end thereof.

Devices, systems, and methods are described including an invasive medical device with a magnetic region. The magnetic region can include a discontinuity in the magnetic region providing a diameter transition, a plurality of spaced magnetic regions can be provided or the magnetic regions can be encoded with data. Systems and methods are described that include ways to read the data.

A medical dispensing device which includes a catheter, an applicator tip at a distal end of the catheter, the catheter and the applicator tip defining a lumen having a longitudinal axis and a distal opening, a plunger in the lumen and movable along the longitudinal axis, and a plurality of elements in the lumen proximal to the distal opening and distal to the plunger, the plurality of elements stacked along the longitudinal axis for dispersement of one element at a time through the distal opening via a force applied by the plunger.

A torque limiting mechanism between a medical device and an implantation accessory is disclosed. In a particular embodiment, a delivery system for a leadless active implantable medical device includes a delivery catheter and a torque shaft disposed within the delivery catheter. The delivery system also includes a docking cap having a distal end for engaging an attachment mechanism of the leadless active implantable medical device. The delivery system also includes a torque limiting component coupled to a distal end of the torque shaft and a proximal end of the docking cap.

The invention comprises an indwelling medical device which is capable of delivering a therapeutic agent evenly along the length of the indwelling portion, including the outer wall, of the device.

Ablation systems of the present disclosure facilitate the safe formation of wide and deep lesions. For example, ablation systems of the present disclosure can allow for the flow of irrigation fluid and blood through an expandable ablation electrode, resulting in efficient and effective cooling of the ablation electrode as the ablation electrode delivers energy at a treatment site of the patient. Additionally, or alternatively, ablation systems of the present disclosure can include a deformable ablation electrode and a plurality of sensors that, in cooperation, sense the deformation of the ablation electrode, to provide a robust indication of the extent and direction of contact between the ablation electrode and tissue at a treatment site.

A medical device includes a tube through which fluid flows; a handle part that is coupled to a proximal end portion of the tube; an electrode tip that is coupled to a distal end portion of the tube; and a fluid injection unit that injects fluid into the tube, in which the electrode tip is formed with one or more injection grooves that communicate with a hollow of the tube to inject the fluid.

A device can detect and retrieve a blood clot by advancing a catheter with a clot sensing element through a patient’s vascular system. The catheter can map, using an electromagnetic sensor disposed at a distal end of the clot sensing element, the patient’s vascular system. A force sensor can generate a position signal indicating the clot sensing element contacted the clot in the patient’s vascular system. Once located, a blood clot retrieval device can be deployed through the catheter and a lumen in the clot sensing element to remove the clot from the patient’s vascular system.

A robotic catheter can include bi-stable concentric tubes and a torsional spring mechanism that can provide torque at the proximal extremity of one or more tubes. The robotic catheter can compensate for the energy that may be released by the tubes snapping from on stable-equilibrium position to another by using the energy stored in the torsional spring mechanism. The energy released by the tubes upon snapping from one stable-equilibrium position to the other can be compensated by the energy stored in the torsional spring at the base, thereby resulting in the first, energy-free, zero stiffness catheter system that (1) synchronizes with the motion of the heart and (2) naturally results in optimal, pseudo-constant contact force with the tissue.

Medical devices and methods for delivering fluid. The medical devices include one or more needles for delivering fluid. The methods may include expanding an expandable member such as an inflatable member to expand an expandable scaffold outward toward a lumen wall.