Abstract: Disclosed herein are devices, systems, and methods for monitoring a formation of an iceball at a cryoablation needle. An example method includes receiving an impedance from at least one electrode in an electrode arrangement that is disposed at a cryoablation needle distal portion. The electrode arrangement is configured to engage the iceball as the iceball is formed over the cryoablation needle distal portion so as to cause a change in the impedance. The example method includes determining one or more physical attributes of the iceball based on a rate of the change in the impedance.

Abstract: A medical device including elongate probe defining proximal and distal ends and a thermally-transmissive region at its distal end, the elongate probe including a first fluid supply line in fluid communication with the thermally-transmissive region. A second fluid supply line is provided in fluid communication with the thermally-transmissive region, the second fluid supply line being connected to the elongate probe separately from the first fluid supply line. An exhaust line in fluid communication with the first and second fluid supply lines.

Abstract: A medical device including elongate probe defining proximal and distal ends and a thermally-transmissive region at its distal end, the elongate probe including a first fluid supply line in fluid communication with the thermally-transmissive region. A second fluid supply line is provided in fluid communication with the thermally-transmissive region, the second fluid supply line being connected to the elongate probe separately from the first fluid supply line. An exhaust line in fluid communication with the first and second fluid supply lines.