Abstract: Medical devices as well as methods for making and using medical devices are disclosed. An example medical device may include a core wire having a proximal shaft portion and a distal shaft portion coupled to the proximal shaft portion. The proximal shaft portion may include a first material. The distal shaft portion may include an inner shaft formed from a second material and an outer shell disposed along an outer surface of the inner shaft. The outer shell may be formed of the first material.

Abstract: A percutaneous circulatory support device includes a housing comprising an inlet and an outlet, an impeller disposed within the housing and being rotatable relative to the housing to cause blood to flow into the inlet, through the housing, and out of the outlet, a cannula coupled to the housing, the cannula extending between a proximal section and a distal section opposite the proximal section, and an expandable element configured for inflation and deflation, the expandable element having a length that is approximately equal to a length of a body of the cannula. The expandable element is configured for providing an increased stiffness to the cannula.

Abstract: A percutaneous circulatory support device includes a housing and an impeller disposed within the housing and being rotatable relative to the housing to cause blood to flow through the housing. A cannula is coupled to the housing, and a distal tip portion is coupled to the cannula opposite the housing. A control wire is movable to modify at least one of a radius, a stiffness, and a shape of the distal tip portion.

Abstract: A percutaneous circulatory support device includes a housing and an impeller disposed within the housing. The impeller is rotatable relative to the housing to cause blood to flow through the housing. A cannula is coupled to the housing, and a distal tip portion is coupled to the cannula opposite the housing. The distal tip portion includes an inner shaping core configured to maintain a predetermined shape of the distal tip portion and an outer layer disposed outwardly from the inner shaping core or the distal tip portion includes an atraumatic, sphere-shaped distal end.

Abstract: A percutaneous circulatory support device includes a housing, a cannula coupled to the housing, the cannula having a first portion and a second portion, and wherein the cannula includes at least one slot disposed along at least the first portion of the cannula, the at least one slot configured such that the first portion of the cannula is defined by a first stiffness and a second portion of the cannula is defined by a second stiffness, the first stiffness being different than the second stiffness.

Abstract: Pressure sensing guidewires are disclosed. The pressure sensing guidewires may include a tubular member having a proximal portion and a distal portion. The distal portion may have a plurality of slots formed therein. The distal portion may have a first wall thickness along a first region and a second wall thickness smaller than the first wall thickness along a second region. A pressure sensor may be disposed within the distal portion of the tubular member and housed within the second region. An anti-thrombogenic coating may be disposed on an inner surface, an outer surface, or both of the second region of the distal portion of the tubular member.

Abstract: Disclosed herein, among other things, are methods and apparatus related to ablation catheters with wireless temperature sensing. The present subject matter provides an ablation catheter system including an ablation transducer and a wireless temperature sensor. The wireless temperature sensor includes at least one temperature sensing element configured to sense a temperature-dependent parameter, circuitry configured to measure the sensed parameter and compute a temperature, a transmitter configured to wirelessly transmit a signal including at least one of the sensed parameter and the computed temperature, and a power supply. A controller is provided to coordinate timing of ablation therapy and sensing of the wireless temperature sensor, in various embodiments.

Abstract: Pressure sensing guidewires are disclosed. The pressure sensing guidewires may include a tubular member having a proximal portion and a distal portion. The distal portion may have a plurality of slots formed therein. The distal portion may have a first wall thickness along a first region and a second wall thickness smaller than the first wall thickness along a second region. A pressure sensor may be disposed within the distal portion of the tubular member and housed within the second region. An anti-thrombogenic coating may be disposed on an inner surface, an outer surface, or both of the second region of the distal portion of the tubular member.

Abstract: A medical device for measuring blood pressure includes a proximal shaft and a distal member including a slotted tube defining a distal lumen extending through the slotted tube, the distal lumen aligned with the proximal lumen and including a distal lumen inner surface. A distal cap is secured to the distal member, the distal cap including a distal cap inner surface defining a void space and an optical pressure sensor is disposed within the void space. A fiber optic cable is coupled to the optical pressure sensor and extends proximally through the distal lumen. A tolerance between an outer surface of the fiber optic cable and the inner surface of the distal lumen inner surface limits relative radial movement of the optical pressure sensor relative to the distal cap inner surface such that the optical pressure sensor is constrained from contacting the distal cap inner surface.

Abstract: Disclosed herein, among other things, are methods and apparatus related to ablation catheters with wireless temperature sensing. The present subject matter provides an ablation catheter system including an ablation transducer and a wireless temperature sensor. The wireless temperature sensor includes at least one temperature sensing element configured to sense a temperature-dependent parameter, circuitry configured to measure the sensed parameter and compute a temperature, a transmitter configured to wirelessly transmit a signal including at least one of the sensed parameter and the computed temperature, and a power supply. A controller is provided to coordinate timing of ablation therapy and sensing of the wireless temperature sensor, in various embodiments.