Processing

Please wait...

Settings

Settings

1. WO2007005073 - PRIMARY HEAT EXCHANGER FOR PATIENT TEMPERATURE CONTROL

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

WHAT IS CLAIMED IS:
1. A heat exchange system, comprising:
a primary heat transfer element (22) through which primary coolant from a primary heat exchange element (12/18) flows;
a secondary heat transfer element (24) containing a bath of secondary heat exchange fluid; and
at least one switch (72) connecting the secondary heat transfer element (24) to ground substantially when the primary coolant heat transfer element (22) is not immersed in the bath and substantially disconnecting the secondary heat transfer element (24) from ground when the primary coolant heat transfer element (22) is immersed in the bath.
2. The system of Claim 1, wherein the primary heat exchange element includes an intravascular catheter (12).
3. The system of Claim 1 , wherein the primary heat exchange element includes at least one pad (18) applied externally to a patient's skin.

4. The system of Claim 1, wherein the switch (72) is mounted on the secondary heat transfer element (24) and is biased to a closed position to ground the secondary heat transfer element (24) when the primary heat transfer element (22) is at a disengaged position, the switch (72) being moved by the primary heat transfer element (22) to an open position to unground the secondary heat transfer element (24).

5. The system of Claim 4, wherein the primary heat transfer element (22) includes a hollow sleeve (42) moving the switch (72).
6. The system of Claim 5, wherein the sleeve (42) surrounds a hollow coil (62) through which primary coolant flows.
7. The system of Claim 6, wherein the secondary heat transfer element (24) includes a jacket (29) and a bath container (30), the sleeve (42) being disposed therebetween when the primary heat transfer element (22) is fully engaged with the secondary heat transfer element (24), the coil (62) being disposed in the container (30), the container (30) holding a secondary heat exchange fluid.