US 9,801,585 B2 · Electrocardiogram noise reduction

Abstract

A catheterization system that includes an electrophysiologic (EP) catheter which has a lumen receiving an electrically conductive fluid delivered by a hydraulic line that is acted upon by a peristaltic pump advantageously avoids noise in intracardiac ECG signal recordings by using an electrical connection to short triboelectrical charge carried by the conductive fluid in the hydraulic line to an existing analog ground in the system. In one embodiment, the electrical connection includes an electrically conductive wire housed in the control handle and configured to provide electrical connection between the fluid and a pin on a printed circuit board housed in the control handle that is electrically connected to the analog ground. In another embodiment, the electrical connection shorts the electrically conductive fluid proximal of the control handle of the catheter.

Claims18

Dependent claims

A catheterization system, comprising:

a catheter having a flexible catheter shaft with a distal portion adapted for insertion into a heart of a subject, the catheter shaft having a lumen for passing an electrically conductive fluid therethrough to exit the catheter at the distal portion;
a control handle at a proximal end of the catheter, the control handle providing an isolated ground of the system;
an electrical connection having first and second ends, the electrical connection linking the electrically conductive fluid and the isolated ground provided by the control handle, the first end of the electrical connection being in contact with the isolated ground provided by the control handle, and the second end of the electrical connection being in contact with the electrically conductive fluid at a location proximal to the distal portion of the catheter shaft.

Dependencies are inferred from the claim text.

Electrocardiogram noise reduction

Life of this patent

Electrocardiogram noise reduction

Life of this patent

Abstract

Claims18