US 6,036,654 A · Multi-lumen, multi-parameter catheter

Abstract

A multi-lumen catheter capable of measuring cardiac output continuously, mixed venous oxygen saturation as well as other hemodynamic parameters. The catheter is also capable of undertaking therapeutic operations such as drug infusion and cardiac pacing. The catheter includes optical fibers for coupling to an external oximeter, an injectate port and thermistor for bolus thermodilution measurements, a heating element for inputting a heat signal and for coupling to an external processor for continuously measuring cardiac output, and a distal lumen for measuring pressure, withdrawing blood, guidewire passage or drug infusion. In a preferred embodiment, the catheter includes a novel lumen configuration permitting an additional infusion lumen for either fast drug infusion or cardiac pacing.

Claims15

Dependent claims

A multi-lumen catheter system configured to accommodate various diagnostic and therapeutic procedures, comprising:

a flexible elongated tubing portion having a longitudinal axis, an exterior wall and defining multiple lumens therein, including:
an interior lumen positioned off-center with respect to the longitudinal axis to be closer to a first side of the exterior wall, and farther from a second side of the exterior wall opposite the first side, wherein the interior lumen is elliptically shaped in cross-section;
a plurality of outer lumens defined within the tubing portion surrounding the interior lumen and generally between the interior lumen and the exterior wall, a pair of the outer lumens being positioned between the interior lumen and the first side and having smaller cross-sectional areas than the other outer lumens for an efficient lumen space utilization, and at least one outer lumen being larger than the interior lumen and being positioned generally between the interior lumen and the second side, wherein the offset interior lumen accommodates the differing sized outer lumens to optimize their relative sizes and positions.

A multi-lumen catheter system configured to accommodate various diagnostic and therapeutic procedures, comprising:

a flexible elongated tubing portion having an exterior wall and a plurality of webs defining multiple lumens within the catheter, including:
an interior, fiber optic lumen elliptically shaped in cross-section and positioned off-center to be closer to a first side of the exterior wall, and farther from a second side of the exterior wall opposite the first side;
and
a plurality of outer lumens surrounding the fiber optic lumen and generally between the fiber optic lumen and the exterior wall, a pair of the outer lumens being positioned generally between the fiber optic lumen and the first side of the exterior wall and sized smaller in cross-sectional area than the other outer lumens for an efficient lumen space utilization, and at least one outer lumen being larger than the fiber optic lumen and being positioned generally between the fiber optic lumen and the second side of the exterior wall opposite the first side, wherein the relative sizes and positions of the lumens between the webs enhances use of the cross-sectional area and kink-resistance of the catheter.

1 more element

Dependencies are inferred from the claim text.

Multi-lumen, multi-parameter catheter

Life of this patent

Multi-lumen, multi-parameter catheter

Life of this patent

Abstract

Claims15