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US 10,702,672 B2Granted
Pressure-sensing catheters and related methods
AssigneeMerit Medical Systems, Inc.
InventorsFred Lampropoulos, Nicholas Accisano, III, Jim Mottola
Life of this patent
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Abstract
A multi-lumen catheter can be used to measure pressure at multiple locations within the vasculature. The multi-lumen catheter can include multiple segments, such as a proximal portion, an intermediate portion, and a distal portion. A segment of a multi-lumen catheter may differ from another segment of the same multi-lumen catheter in radiodensity, hardness, and/or some other characteristic. Some multi-lumen catheters are designed to permit measurements of pressure in different lumens.
Claims18
A catheter comprising:
- a body portion comprising:
- a main lumen centrally disposed along the body portion;
- a first lumen disposed radially outward from the main lumen;
- a second lumen disposed radially outward from the main lumen opposite the first separate lumen;
- a distal portion having at least one port that is in fluid communication with the first lumen of the catheter, wherein the distal portion has a first radiodensity;
- a proximal portion having at least one port that is in fluid communication with the second lumen of the catheter, wherein the proximal portion has a second radiodensity;
- and
- an intermediate portion disposed between the proximal portion and the distal portion, the intermediate portion having a third radiodensity;
- and
- an integrated pressure readout housing disposed at a proximal end of the body portion;
- wherein the proximal end of the body portion terminates in a main proximal conduit that comprises the main lumen, a first conduit that comprises the first lumen, and a second conduit that comprises the second lumen, wherein a portion of each conduit is disposed within the integrated pressure readout housing and a portion of each conduit is disposed outside of the integrated pressure readout housing;
- wherein a first inline pressure sensor is disposed within the integrated pressure readout housing and is in communication with the first lumen of the first conduit and a second inline pressure sensor is disposed within the integrated pressure readout housing and is in communication with the second lumen of the second conduit;
- wherein the third radiodensity differs from both the first radiodensity and the second radiodensity;
- wherein the intermediate portion comprises a bend when the catheter is in an unconstrained state;
- and
- wherein the third radiodensity facilitates positioning the intermediate portion across a heart valve.
13 more elements
A catheter comprising:
- a body portion comprising:
- a main lumen centrally disposed along the body portion,
- a first lumen disposed radially outward from the main lumen,
- a second lumen disposed radially outward from the main lumen opposite the first lumen,
- a distal portion having at least one port that is in fluid communication with the first lumen of the catheter, wherein the distal portion has a first durometer hardness;
- a proximal portion having at least one port that is in fluid communication with the second lumen of the catheter, wherein the proximal portion has a second durometer hardness;
- and
- an intermediate portion disposed between the proximal portion and the distal portion, the intermediate portion having a third durometer hardness;
- an integrated pressure readout housing disposed at a proximal end of the body portion;
- wherein the proximal end of the body portion terminates in a main proximal conduit that comprises the main lumen, a first conduit that comprises the first lumen, and a second conduit that comprises the second lumen, wherein a portion of each conduit is disposed within the integrated pressure readout housing and a portion of each conduit is disposed outside of the integrated pressure readout housing;
- wherein a first inline pressure sensor is disposed within the integrated pressure readout housing and is in communication with the first lumen of the first conduit and a second inline pressure sensor is disposed within the integrated pressure readout housing and is in communication with the second lumen of the second conduit;
- wherein the first durometer hardness is between 45 and 55 Shore D, the second durometer hardness is between 90 and 100 Shore D, and the third durometer hardness is between 65 and 80 Shore D;
- and
- a transition zone disposed between the proximal portion and the intermediate portion, wherein the transition zone comprises:
- a proximal portion inner tube, a proximal portion outer tube, and an annular space disposed between the proximal portion inner tube and the proximal portion outer tube;
- and
- a proximal end portion of the intermediate portion,
- wherein the proximal end portion is disposed in the annular space and fixedly coupled to the proximal portion inner tube and the proximal portion outer tube.
15 more elements
Dependencies are inferred from the claim text.