System and method for bringing hypothermia rapidly onboard
View Patent ↗An intravenous heat exchange catheter and/or an external cooling pad/bladder can be used to maintain hypothermia in, e.g., a cardiac arrest patient, but to accelerate the cooling process the patient first can be infused with cold saline before the opportunity arises to connect the catheter or pad to the patient.
1. A system for controlling patient temperature, comprising:
a closed loop heat exchange catheter configured for placement in the circulatory system of a patient to exchange heat with the blood of the patient;
an external heat exchange bladder configured for exchanging heat with the skin of a patient; and
a heat exchange system engageable with both the catheter and the bladder, wherein the heat exchange system includes at least one coolant loop having a coldwell, the catheter being associated with a catheter working fluid loop including a catheter coil disposable in the coldwell, the bladder being associated with a bladder working fluid loop including a bladder coil.
2. The system of claim 1 , wherein the heat exchange system includes a housing holding at least one sensor sensing the fluid flow engagement of the heat exchange system with at least one of: the bladder, and the catheter, the sensor providing a signal to a controller in the housing.
3. The system of claim 1 , comprising a controller receiving a patient temperature signal from a BTT sensor.
4. The system of claim 1 , comprising at least one IV bag supported on a housing of the system for infusing cold saline through an IV line and directly into the bloodstream of a patient.
5. The system of claim 1 , wherein the heat exchange system includes at least one coolant loop, the coolant loop configured for exchanging heat with a working fluid loop associated with the catheter, the coolant loop also being configured for fluid communication with the bladder.
6. The system of claim 1 , wherein the heat exchange system includes at least one refrigerant loop including a compressor and at least one heat exchanger communicating with the compressor.
7. The system of claim 6 , comprising two heat exchangers in fluid flow parallel with each other.
8. The system of claim 1 , wherein both working fluid loops are associated with respective pumps.
9. The system of claim 8 , wherein the heat exchange system includes an internal reservoir for priming the bladder.
10. The system of claim 1 , wherein the heat exchange system simultaneously controls respective temperatures of respective fluids flowing through both the catheter and bladder.
11. A beat exchange system, comprising:
a coolant loop;
at least a first working fluid loop in thermal communication with the coolant loop;
at least one intravascular heat exchange catheter associated with the first working fluid loop such that working fluid circulates through the heat exchange catheter without entering the patient's bloodstream when the catheter is positioned in the bloodstream; and
at least one external heat exchange member configured for placement against a patient's skin to heat or cool the skin, the external heat exchange member being configured for heat transfer using the coolant loop.
12. The system of claim 11 , wherein the external heat exchange member is associated with a second working fluid loop, the second working fluid loop exchanging heat with the coolant loop.
13. The system of claim 11 , wherein the external heat exchange member is configured for connecting to the coolant loop to receive coolant therefrom.
14. The system of claim 11 , wherein the coolant loop is embodied in a heat exchange system contained in a single housing and engageable with both the catheter and the external heat exchange member.
15. The system of claim 14 , wherein the housing includes at least one sensor sensing the fluid flow engagement of the heat exchange system with at least one of: the external heat exchange member, and the catheter, the sensor providing a signal to a controller in the housing.
16. The system of claim 14 , comprising a controller in the housing and receiving a patient temperature signal from a BTT sensor.
17. The system of claim 14 , comprising at least one IV bag supported on the housing for infusing cold saline directly into the bloodstream of a patient.
18. The system of claim 14 , wherein the heat exchange system simultaneously controls respective temperatures of respective fluids flowing through both the catheter and bladder.
19. A method for patient temperature control, comprising:
providing a heat exchange system;
engaging an intravascular heat exchange catheter with the system and with a patient to exchange heat with the patient; and
engaging at least one bladder with the system and placing the bladder against the patient's skin to exchange heat with the patient.