System and method for accurate placement of a catheter tip in a patient
First Claim
Patent Images
1. A system for accurate placement of a catheter tip in a patient, the system comprising:
- a catheter adapted for placement within a vein of a patient, the catheter having a tip at a distal end thereof and having a proximal end which is normally located outside of the patient;
a pressure sensor adapted to sense pressure within the vein of said patient at said tip of said catheter, said pressure sensor being adapted to sense a venous pressure waveform including at least one of a V pressure wave, generated by filling of the right atrium, and an A pressure wave, generated by contraction of the right atrium; and
catheter tip placement location indicating circuitry operative in response to at least an output of said pressure sensor and an ECG signal to provide an indication that said catheter tip is located in said patient at the junction of the superior vena cava (SVC) and the right atrium (RA),an R wave of said ECG signal being employed by said catheter tip placement location indicating circuitry as a fiducial point with respect to which a propagation delay of said venous pressure waveform is measured, said catheter tip placement location indicating circuitry employing said propagation delay to provide said indication that said catheter tip is located at the junction of the superior vena cava (SVC) and the right atrium (RA).
1 Assignment
0 Petitions
Accused Products
Abstract
A system for accurate placement of a catheter tip in a patient, the system including a catheter adapted for placement within a patient, the catheter having a tip at a distal end thereof and having a proximal end which is normally located outside of the patient, a pressure sensor adapted to sense pressure at the tip of the catheter and catheter tip placement location indicating circuitry operative in response to at least an output of the pressure sensor for indicating the location of the catheter tip in the patient.
126 Citations
13 Claims
-
1. A system for accurate placement of a catheter tip in a patient, the system comprising:
-
a catheter adapted for placement within a vein of a patient, the catheter having a tip at a distal end thereof and having a proximal end which is normally located outside of the patient; a pressure sensor adapted to sense pressure within the vein of said patient at said tip of said catheter, said pressure sensor being adapted to sense a venous pressure waveform including at least one of a V pressure wave, generated by filling of the right atrium, and an A pressure wave, generated by contraction of the right atrium; and catheter tip placement location indicating circuitry operative in response to at least an output of said pressure sensor and an ECG signal to provide an indication that said catheter tip is located in said patient at the junction of the superior vena cava (SVC) and the right atrium (RA), an R wave of said ECG signal being employed by said catheter tip placement location indicating circuitry as a fiducial point with respect to which a propagation delay of said venous pressure waveform is measured, said catheter tip placement location indicating circuitry employing said propagation delay to provide said indication that said catheter tip is located at the junction of the superior vena cava (SVC) and the right atrium (RA). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for accurate placement of a catheter tip in a patient, the method comprising:
-
placing a catheter within a vein of a patient, said catheter having a tip at a distal end thereof and having a proximal end which is normally located outside of the patient; sensing pressure within the vein of said patient at said tip of said catheter, said sensing pressure comprising sensing a venous pressure waveform including at least one of a V pressure wave, generated by filling of the right atrium, and an A pressure wave, generated by contraction of the right atrium; receiving an ECG signal; measuring a propagation delay of said venous pressure waveform using a processor, said measuring comprising employing an R wave of said ECG signal as a fiducial point with respect to which said propagation delay is measured; and employing said propagation delay to provide an indication that said catheter tip is located in said patient at the junction of the superior vena cava (SVC) and the right atrium (RA). - View Dependent Claims (10, 11, 12, 13)
-
Specification