US 2025/0152237 A1 · System and Method for Mitigating Rising Impedance Via a Pump Assembly During Use of Cooled Radiofrequency Probes

Abstract

A method of treating tissue of a patient's body includes providing a power source coupled to at least one probe assembly. The probe assembly includes an elongate member with a distal region and a proximal region. The distal region has an electrically and thermally-conductive energy delivery device for delivering one of electrical and radiofrequency energy to the patient's body. The electrically and thermally-conductive energy delivery device has one or more internal lumens for circulating a cooling fluid therethrough and an electrically and thermally-conductive protrusion having a temperature sensing element. The temperature sensing element extends from a distal end of the energy delivery device. The method includes inserting the energy delivery device of the at least one probe assembly into the patient's body. Further, the method includes routing the energy delivery device of the at least one probe assembly to the tissue of the patient's body. The method also includes simultaneously circulating the cooling fluid through the one or more internal lumens via at least one pump assembly and delivering energy from the power source to the tissue through the energy delivery device. Further, the method includes monitoring one or more procedure parameters while delivering the energy from the power source to the tissue through the energy delivery device. Moreover, the method includes determining, in real-time, whether a rising impedance event is likely to occur in a predetermined time period based on the one or more procedure parameters and determining a command for the pump assembly based on whether the rising impedance event is likely to occur in the predetermined time period.

Claims20

Dependent claims

A method of treating tissue of a patient's body, the method comprising:

providing a power source coupled to at least one probe assembly, the at least one probe assembly having an electrically and thermally-conductive energy delivery device for delivering one of electrical and radiofrequency energy to the patient's body, the electrically and thermally-conductive energy delivery device having one or more internal lumens for circulating a cooling fluid therethrough;
inserting the electrically and thermally-conductive energy delivery device of the at least one probe assembly into the patient's body;
routing the electrically and thermally-conductive energy delivery device of the at least one probe assembly to the tissue of the patient's body;
simultaneously circulating the cooling fluid through the one or more internal lumens via at least one pump assembly and delivering energy from the power source to the tissue through the electrically and thermally-conductive energy delivery device;
monitoring one or more procedure parameters while delivering the energy from the power source to the tissue through the electrically and thermally-conductive energy delivery device;
determining, in real-time, whether a rising impedance event is likely to occur in a predetermined time period based on the one or more procedure parameters based on the one or more procedure parameters including at least one of a temperature of the tissue, an impedance of the tissue, and a power demand of the electrically and thermally-conductive energy delivery device;
and,
responsive to determining that the rising impedance event is likely to occur in the predetermined time period, decreasing a flow rate of the at least one pump assembly;
and
responsive to determining that the rising impedance event is unlikely to occur in the predetermined time period, increasing the flow rate of the at least one pump assembly up to a predetermined maximum flow rate or rotational speed.

7 more elements

A medical probe assembly for delivering energy to a patient's body, the probe assembly comprising:

an electrically and thermally-conductive energy delivery device for delivering one of electrical and radiofrequency energy to the patient's body, the electrically and thermally-conductive energy delivery device comprising one or more internal lumens configured for circulating a cooling fluid therethrough;
at least one pump assembly for circulating the cooling fluid to and from the electrically and thermally-conductive energy delivery device;
one or more sensors for monitoring one or more procedure parameters including at least one of a temperature of the patient's tissue, an impedance of the tissue, and a power demand of the electrically and thermally-conductive energy delivery device;
and
a controller communicatively coupled to the one or more sensors, the controller comprises a rising impedance detection engine configured to perform one or more operations, the one or more operations comprising:
determining, in real-time, whether a rising impedance event is likely to occur in a predetermined time period based on the one or more procedure parameters,
responsive to determining that the rising impedance event is likely to occur in the predetermined time period, decreasing a flow rate of the at least one pump assembly, and
responsive to determining that the rising impedance event is unlikely to occur in the predetermined time period, increasing the flow rate of the at least one pump assembly up to a predetermined maximum flow rate or rotational speed.

5 more elements

Dependencies are inferred from the claim text.

System and Method for Mitigating Rising Impedance Via a Pump Assembly During Use of Cooled Radiofrequency Probes

Life of this patent

System and Method for Mitigating Rising Impedance Via a Pump Assembly During Use of Cooled Radiofrequency Probes

Life of this patent

Abstract

Claims20