US 12,433,674 B2
Cooling fluid flow rate monitoring for laser interstitial thermal therapy
Janardan Vaidyanathan, Thane-West (IN); Rebecca Vincelette, Louisville, CO (US); Drew Wilson, Boulder, CO (US); Christine Drown, Louisville, CO (US); Marco Capote, Louisville, CO (US); and Shawn Santana, Louisville, CO (US)
Assigned to Medtronic Navigation, Inc., Lafayette, CO (US)
Filed by Medtronic Navigation, Inc., Lafayette, CO (US)
Filed on Sep. 6, 2022, as Appl. No. 17/929,971.
Claims priority of provisional application 63/366,007, filed on Jun. 7, 2022.
Claims priority of provisional application 63/255,642, filed on Oct. 14, 2021.
Prior Publication US 2023/0121330 A1, Apr. 20, 2023
Int. Cl. A61B 18/20 (2006.01); A61B 18/00 (2006.01); A61B 18/24 (2006.01)
CPC A61B 18/20 (2013.01) [A61B 2018/00577 (2013.01); A61B 2018/00791 (2013.01)] 20 Claims
OG exemplary drawing
 
1. 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 sensor arranged at a point along a length of the inflow channel between the inflow port and the cooling fluid source, 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 outside of the cooling catheter, wherein the second sensor measures the parameter of the fluid within the outflow channel;
wherein at least one of the first sensor and the second sensor comprise a break-beam sensor that counts drops in a respective drip chamber; and
a processor to:
receive inflow data comprising the parameter of the fluid within the inflow channel measured by the first sensor;
receive outflow data comprising the parameter of the fluid within the outflow channel measured by the second sensor;
compare the inflow data to the outflow data to determine a parameter comparison value;
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.