摘要:
Annuloplasty rings and methods for inserting annuloplasty rings are herein disclosed. The annuloplasty ring has a ring shell and a plurality of anchoring fasteners for anchoring the ring shell to adjacent hear tissue. To maintain the shape of the annuloplasty ring upon attachment of the ring to the patient's heart, a hardening polymer is inserted into the ring shell, which is permitted to cure, thereby providing support for the annuloplasty ring and the patient's heart valve.
摘要:
Techniques are described that allow intravascular ultrasound (“IVUS”) imaging of patient tissue, e.g., a blood vessel wall, to be performed at one or more angles selected by a clinician, for example. In one example, a method includes receiving user input, via interaction with a user interface, that defines a range of angles through which a scan will be performed, determining, based on the received user input, at least one current value to be applied to at least one lead of a stator of a motor, controlling application of the at least one current to the at least one lead of the stator in order to rotate a rotor of the motor through the range of angles, and through the range of angles, receiving and processing electrical signals from at least one transducer to form at least one image.
摘要:
A medical device system includes an elongated body with a distal end that is configured and arranged for insertion into a patient. A housing is disposed in the distal end of the body. A rotatable magnet is disposed in the housing. At least one magnetic field winding is configured and arranged to generate a magnetic field at the location of the magnet. The magnetic field causes rotation of the magnet at a target frequency. An array of magnetic field sensors is disposed external to the patient. The magnetic field sensors are configured and arranged to sense the location and orientation of the magnet in relation to the array of magnetic field sensors.
摘要:
A percutaneous pumping system for providing hemodynamic support to a patient includes a pumping sleeve that defines a lumen extending along the length of the pumping sleeve. The pumping sleeve is configured and arranged for insertion into patient vasculature. At least one rotatable magnet is disposed in the pumping sleeve. The at least one first magnet is configured and arranged to be driven to rotate by a magnetic field generated external to the pumping sleeve. At least one impeller is coupled to the at least one magnet. Rotation of the at least one magnet causes a corresponding rotation of the at least one impeller. An anchoring arrangement is coupled to the pumping sleeve. The anchoring arrangement is configured and arranged to anchor the pumping sleeve at a target pumping location when the pumping sleeve is inserted into patient vasculature.
摘要:
Annuloplasty rings and methods for inserting annuloplasty rings are herein disclosed. The annuloplasty ring has a ring shell and a plurality of anchoring fasteners for anchoring the ring shell to adjacent heart tissue. To maintain the shape of the annuloplasty ring upon attachment of the ring to the patient's heart, a hardening polymer is inserted into the ring shell, which is permitted to cure, thereby providing support for the annuloplasty ring and the patient's heart valve.
摘要:
A percutaneous pumping system for providing hemodynamic support to a patient includes a pumping sleeve that defines a lumen extending along the length of the pumping sleeve. The pumping sleeve is configured and arranged for insertion into patient vasculature. At least one rotatable magnet is disposed in the pumping sleeve. The at least one first magnet is configured and arranged to be driven to rotate by a magnetic field generated external to the pumping sleeve. At least one impeller is coupled to the at least one magnet. Rotation of the at least one magnet causes a corresponding rotation of the at least one impeller. An anchoring arrangement is coupled to the pumping sleeve. The anchoring arrangement is configured and arranged to anchor the pumping sleeve at a target pumping location when the pumping sleeve is inserted into patient vasculature.
摘要:
A medical device system includes an elongated body with a distal end that is configured and arranged for insertion into a patient. A housing is disposed in the distal end of the body. A rotatable magnet is disposed in the housing. At least one magnetic field winding is configured and arranged to generate a magnetic field at the location of the magnet. The magnetic field causes rotation of the magnet at a target frequency. An array of magnetic field sensors is disposed external to the patient. The magnetic field sensors are configured and arranged to sense the location and orientation of the magnet in relation to the array of magnetic field sensors.
摘要:
A catheter assembly for an intravascular ultrasound system includes a catheter insertable into patient vasculature via a guidewire. A watertight imaging core is disposed in the distal end of the catheter. The imaging core includes a motor, at least one fixed transducer, and a signal redirection unit. The motor includes a magnet configured and arranged to rotate upon generation of a magnetic field by magnetic field windings. The signal redirection unit is coupled to the magnet such that rotation of the magnet causes a corresponding rotation of at least a portion of the signal redirection unit. The signal redirection unit includes a tilted mirror that redirects acoustic signals transmitted from the fixed transducer to patient tissue. At least one transducer conductor and at least one stator conductor are electrically coupled to the imaging core and in electrical communication with the proximal end of the catheter.
摘要:
Devices, systems, and methods associated with pressure sensing are described herein. In one or more embodiments, an intravascular pressure sensing device includes a magnetic sensing element fixedly positioned within a sensor tube, a magnet located a distance from the magnetic sensing element within the sensor tube, the magnet movably positioned within the sensor tube via a ferrofluid magnetically attached to the magnet, and an amount of compressible fluid sealed between the magnetic sensing element and the magnet.
摘要:
An imaging core, that is configured and arranged for insertion into a catheter, includes a mirror disposed at a distal end of a rotatable driveshaft; a motor coupled to the driveshaft and including a rotatable magnet and at least two magnetic field windings disposed around at least a portion of the magnet on a rigid slotted material; and at least one fixed transducer positioned between the motor and the rotatable mirror. The driveshaft extends through an aperture in the magnet to allow passage of the driveshaft through the at least one transducer to the rotatable mirror. At least one transducer conductor is electrically coupled to the at least one transducer and in electrical communication with the proximal end of the catheter. At least one motor conductor is electrically coupled to the magnetic field windings and in electrical communication with the proximal end of the catheter.