Abstract: During a medical procedure, a transseptal fenestration is made at a septum of the heart and a shunt is implanted into the transseptal fenestration. During the same medical procedure, a transapical puncture is made into a left ventricle of the heart. A prosthetic valve is delivered via the transapical puncture and implanted at a mitral valve of the heart. Subsequently to delivering the prosthetic valve and making the transseptal fenestration, the transapical puncture is closed. Other embodiments are also described.

Abstract: An antenna system includes a stacked patch antenna (100) comprising two or more patch antennas symmetrically aligned around an axis. The stacked patch antenna (100) comprises a differential feed patch antenna. The two or more patch antennas include a first patch antenna (105) and a second patch antenna (110). At least a portion of the second patch antenna (110) serves as a ground plane for the first patch antenna (105).

Abstract: An apparatus and method for viewing and analyzing the interior of a molten metal bath during treatment in a metallurgical vessel comprises a concentric pipe tuyere extending into an open mouth of the vessel and below the surface of the bath and comprising an inner pipe through which a pressurized transparent fluid is passed, and an outer pipe forming, with the inner pipe, an annulus through which a cooling fluid is passed. A sight glass is disposed in alignment with an opening in the inner pipe and with a centerline of the tuyere providing visual access to the interior of the bath. An optical sensor is associated with the sight glass to receive and analyze light generated in the bath to determine molten metal properties such as temperature and chemical composition.