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US 7,464,602 B2Granted
Pressure transmission catheter with sheath
AssigneeTransoma Medical, Inc.
InventorsLynn M. Zwiers, Gregg Lichtscheidl, Eric Rudie
Life of this patent
Estimating the term…
Abstract
Methods and apparatus for sensing pressure are disclosed. One disclosed pressure measuring device comprises a pressure transmission catheter including a stem portion and a sheath fixed to the stem portion. The disclosed sheath comprises a wall defining a cavity that is in fluid communication with a stem lumen defined by the stem portion. The disclosed sheath has a first transverse extent and a second transverse extent that is different from the first transverse extent.
Claims24
An implantable pressure sensor, comprising:
- a pressure transducer with a mechanical sensing input and an electrical output that provides an indication of a sensed pressure level;
- and
- an elongate pressure transmission catheter comprising an outer covering that forms an inner cavity, and a pressure transmission substance contained within the inner cavity;
- wherein at least a portion of the outer covering is formed to have a cross-sectional shape that is a partially flattened circle;
- and
- wherein the pressure transmission catheter is formed so that external pressure forces acting upon an outside surface of the portion of the outer covering having partially-flattened-circle-cross-sectional-shape compress the pressure transmission substance within the inner cavity and are conveyed via the pressure transmission substance to the mechanical sensing input of the pressure transducer to provide an indication of a pressure level of an environment within which the pressure transmission catheter is positioned.
3 more elements
An implantable pressure sensor, comprising:
- a pressure transducer with a mechanical sensing input and an electrical output that provides an indication of a sensed pressure level;
- and
- an elongate pressure transmission catheter comprising an outer covering that forms an inner cavity, and a pressure transmission substance contained within the inner cavity;
- wherein at least a portion of the outer covering is formed to have a non-circular cross-sectional shape;
- and
- wherein the pressure transmission catheter is formed so that external pressure forces acting upon an outside surface of the portion of the outer covering having non-circular- cross-sectional-shape compress the pressure transmission substance within the inner cavity and are conveyed via the pressure transmission substance to the mechanical sensing input of the pressure transducer to provide an indication of a pressure level of an environment within which the pressure transmission catheter is positioned.
3 more elements
Dependencies are inferred from the claim text.