Abstract: An adjustable diameter catheter includes a wall extending in an axial direction surrounding a lumen of the catheter, the wall having at least one outer spring and at least one inner spring arranged coaxially to the outer spring. The at least one outer spring surrounds the at least one inner spring. The at least one inner and outer springs each have a distal end which are connected to one another. The at least one inner and outer springs each have a plurality of windings. A winding direction of the at least one outer spring is opposite to a winding direction of the at least one inner spring.

Abstract: The invention describes an implantable pressure sensor having a housing, wherein the housing has walls and two or more pressure transfer membranes bounding an internal volume, wherein the pressure transfer membranes are not coplanar.

Abstract: An implantable pressure sensor device (100) has a housing (10) which is at least partially made of a pressure transmitting membrane (20), and which includes one or more regions which can reversibly deform while maintaining the surface area of the membrane (20) when the internal volume of the housing (10) is changed. The housing (10) has a non-circular cross-section which can deform to a more circular shape when pressure in the internal volume increases. An inner housing is preferably situated within the housing, with its exterior spaced from the interior of the housing, and has its inner volume in fluid communication with the space between the housing and inner housing.

Abstract: A catheter device for implanting an implant includes a self-expandable framework and an outer shaft having a capsule at a distal end. The capsule surrounds the framework such that they are displaceable relative to one another, which permits the framework to be released in sections. A released portion of the framework expands automatically and can be re-introduced into the capsule. A ring structure is displaceable in the distal direction (R?) beyond the capsule, such that an already released, expanded portion of the framework is contactable by the ring structure to limit axial forces exerted on the capsule and facilitate re-sheathing. The framework can be a self-expanding stent that supports a heart valve prosthesis.

Abstract: An adjustable diameter catheter includes a wall extending in an axial direction surrounding a lumen of the catheter, the wall having at least one outer spring and at least one inner spring arranged coaxially to the outer spring. The at least one outer spring surrounds the at least one inner spring. The at least one inner and outer springs each have a distal end which are connected to one another. The at least one inner and outer springs each have a plurality of windings. A winding direction of the at least one outer spring is opposite to a winding direction of the at least one inner spring.

Abstract: The invention describes an implantable pressure sensor having a housing, wherein the housing has walls and two or more pressure transfer membranes bounding an internal volume, wherein the pressure transfer membranes are not coplanar.

Abstract: An implantable pressure sensor device (100) has a housing (10) which is at least partially made of a pressure transmitting membrane (20), and which includes one or more regions which can reversibly deform while maintaining the surface area of the membrane (20) when the internal volume of the housing (10) is changed. The housing (10) has a non-circular cross-section which can deform to a more circular shape when pressure in the internal volume increases. An inner housing is preferably situated within the housing, with its exterior spaced from the interior of the housing, and has its inner volume in fluid communication with the space between the housing and inner housing.