Detection of bubbles in irrigation fluid
AssigneeBiosense Webster (Israel) Ltd.
InventorsEitan Peri, Alaa Zoubi, Lior Botzer
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Abstract
A method, including ejecting irrigation fluid from a distal end of a probe so as to irrigate tissue, and receiving, over a period of time, initial signals indicative of respective temperatures of the distal end, from a temperature sensor in the distal end. The method also includes formulating from the initial signals a temperature range between upper and lower temperature thresholds and, when a further signal from the temperature sensor, received subsequent to the period of time, is indicative of a further temperature above the upper temperature threshold, raising an alarm that a bubble is present in the irrigation fluid.
Claims16
A method, comprising:
- ejecting irrigation fluid from a distal end of a probe so as to irrigate tissue;
- receiving, over a period of time, initial signals indicative of respective temperatures of the distal end, from a temperature sensor in the distal end;
- formulating from the initial signals a temperature range between upper and lower temperature thresholds;
- and
- when a further signal from the temperature sensor, received subsequent to the period of time, is indicative of a further temperature above the upper temperature threshold, raising an alarm that a bubble is present in the irrigation fluid.
Apparatus, comprising:
- a probe having a distal end configured to eject irrigation fluid so as to irrigate tissue;
- a temperature sensor located in the distal end;
- and
- a processor configured to:
- receive from the temperature sensor, over a period of time, initial signals indicative of respective temperatures of the distal end,
- formulate from the initial signals a temperature range between upper and lower temperature thresholds, and
- when a further signal from the temperature sensor, received subsequent to the period of time, is indicative of a further temperature above the upper temperature threshold, raising an alarm that a bubble is present in the irrigation fluid.
A method, comprising:
- ejecting irrigation fluid from a distal end of a probe so as to irrigate tissue;
- receiving, over a period of time, initial signals indicative of respective temperatures of the distal end, from a temperature sensor in the distal end;
- formulating from the initial signals derivatives of the respective temperatures;
- and
- when successive derivatives cross respective preset thresholds, and occur within a predetermined time, raising an alarm that a bubble is present in the irrigation fluid.
Apparatus, comprising:
- a probe having a distal end configured to eject irrigation fluid so as to irrigate tissue;
- a temperature sensor located in the distal end;
- and
- a processor configured to:
- receive from the temperature sensor, over a period of time, initial signals indicative of respective temperatures of the distal end,
- formulate from the initial signals derivatives of the respective temperatures, and
- when successive derivatives cross respective preset thresholds, and occur within a predetermined time, raise an alarm that a bubble is present in the irrigation fluid.
Dependencies are inferred from the claim text.