Magnetic field phase drift verifier and cooling system checker

A method of laser ablation therapy, comprising:

• providing a laser fiber cooling monitoring system, comprising:
• a cooling catheter extending a length from a proximal end of the cooling catheter to a distal end of the cooling catheter, the cooling catheter comprising:
• an inflow port disposed adjacent the proximal end;
• an outflow port disposed adjacent the proximal end;
• and
• a fluid flow path comprising a first fluid flow channel extending from the inflow port to a point inside the cooling catheter adjacent the distal end and a second fluid flow channel extending from the point inside the cooling catheter adjacent the distal end to the outflow port;
• a cooling fluid source comprising a container that contains a cooling fluid;
• an inflow channel arranged in fluid communication with the cooling fluid source, the inflow port, and the first fluid flow channel;
• an outflow channel arranged in fluid communication with the outflow port and the second fluid flow channel;
• a first temperature sensor arranged at a point along a length of the inflow channel between the inflow port and the cooling fluid source, wherein the first temperature sensor measures a temperature of a fluid within the inflow channel;
• and
• a second temperature sensor arranged at a point along a length of the outflow channel outside of the cooling catheter, wherein the second temperature sensor measures a temperature of the fluid within the outflow channel;
• initiating a flow of the cooling fluid from the cooling fluid source through the fluid flow path, wherein a laser fiber is arranged in contact with a portion of the cooling fluid flowing along a length of the laser fiber in the fluid flow path;
• receiving, from the first temperature sensor, a first temperature value comprising the temperature of the fluid within the inflow channel prior to flowing along the length of the laser fiber in the fluid flow path;
• receiving, from the second temperature sensor, a second temperature value comprising the temperature of the fluid within the outflow channel after flowing along the length of the laser fiber in the fluid flow path;
• comparing, by a processor, the first temperature value to the second temperature value to obtain a temperature comparison value;
• determining, by the processor, whether the temperature comparison value is outside a tolerance range;
• and
• causing, by the processor when the temperature comparison value is determined to be outside of the tolerance range, a signal to be output by at least one of a display and a speaker that notifies a user of a fluid flow restriction or a malfunction of the laser fiber cooling monitoring system.

A laser fiber cooling monitoring system, comprising:

• a cooling fluid source comprising a container that contains a cooling fluid;
• an inflow channel extending from the cooling fluid source to an inflow port of a cooling catheter, wherein the inflow channel is arranged in fluid communication with the cooling fluid source and the inflow port of the cooling catheter;
• an outflow channel extending from an outflow port of the cooling catheter to the cooling fluid source, wherein the outflow channel is arranged in fluid communication with the outflow port and the cooling fluid source;
• a first sensor arranged at a point along a length of the inflow channel between the inflow port of the cooling catheter and the cooling fluid source, wherein the first sensor comprises a first temperature sensor, and wherein the first sensor measures a parameter of a fluid within the inflow channel;
• a second sensor arranged at a point along a length of the outflow channel between the outflow port of the cooling catheter and the cooling fluid source, wherein the second sensor comprises a second temperature sensor, and wherein the second sensor measures the parameter of the fluid within the outflow channel;
• and
• a processor to:
• receive, from the first sensor, inflow data comprising the parameter of the fluid within the inflow channel, wherein the inflow data comprises a first temperature of the fluid within the inflow channel;
• receive, from the second sensor, outflow data comprising the parameter of the fluid within the outflow channel, wherein the outflow data comprises a second temperature of the fluid within the outflow channel;
• compare the inflow data to the outflow data to determine a parameter comparison value that is at least based on the first temperature and the second temperature;
• determine whether the parameter comparison value is outside of a tolerance range;
• and
• cause, when the parameter comparison value is determined to be outside of the tolerance range, a signal to be output by at least one of a display and a speaker that notifies a user of a fluid flow restriction or a malfunction of the laser fiber cooling monitoring system.