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US 2014/0180278 A1Published application
System and method for monitoring bioimpedance and respiration
AssigneeMedtronic CryoCath LP
InventorsMarwan ABBOUD, Johnny Al ASMAR, Chadi HARMOUCHE
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Abstract
A method of treating tissue is provided, including positioning a portion of a catheter in proximity to cardiac tissue; measuring an impedance value with the catheter; determining a respiratory rate based at least in part on the measured impedance value; and thermally treating the cardiac tissue with the catheter.
Claims20
A medical device for thermally treating cardiac tissue, comprising:
- a catheter body having a proximal end, a distal end defining a distal tip, and a thermally conductive region;
- a first electrode on the catheter proximal to the thermally conductive region;
- a second electrode on the catheter proximal to the first electrode, the first and second electrodes being operable to measure an impedance value across at least a portion of a thoracic cavity.
A medical system for thermally treating cardiac tissue, the system comprising:
- a catheter, the catheter including:
- a proximal end, a distal end, and a thermally conductive region;
- a first electrode on the catheter proximal to the thermally conductive region;
- a second electrode on the catheter proximal to the first electrode;
- and
- an impedance measurement system in communication with the catheter, the impedance measurement system being programmed to:
- initiate thermal treatment of tissue proximate a phrenic nerve;
- measure an impedance value;
- correlate the impedance value to a respiratory status, the respiratory status being a response of the phrenic nerve to the thermal treatment;
- define a respiratory status threshold value;
- and
- terminate the thermal treatment of the tissue when the correlated respiratory status is below the predefined threshold value.
9 more elements
A medical system for thermally treating cardiac tissue, the system comprising:
- a catheter, the catheter including:
- a proximal end, a distal end defining a distal tip, and a thermally conductive region;
- a first electrode on the catheter proximal to the thermally conductive region;
- a second electrode on the catheter proximal to the first electrode, the first and second electrodes being operable to provide an excitation current;
- a third electrode proximate the first electrode;
- and
- a fourth electrode proximate the second electrode, the third and fourth electrodes being operable to measure an impedance value across at least a portion of a thoracic cavity;
- and
- an impedance measurement system in communication with the catheter, the impedance measurement system being programmed to:
- initiate thermal treatment of tissue by the thermally conductive region proximate a phrenic nerve;
- receive impedance value signals from the third and fourth electrodes;
- correlate the impedance value to a respiratory status, the respiratory status being a response of the phrenic nerve to the thermal treatment;
- define a respiratory status threshold value;
- and
- terminate the thermal treatment of the tissue when the correlated respiratory status is below the predefined threshold value.
12 more elements
Dependencies are inferred from the claim text.