Central nervous system localized hypothermia apparatus and methods

A spinal cooling and drainage apparatus, comprising:

• a drainage and cooling catheter assembly adapted for intrathecal insertion into a patient comprising an insertion portion and a working end portion, wherein the maximum cross-sectional dimension of the inserted portion of the drainage and cooling catheter assembly is about 5 Fr;
• and
• a console, comprising:
• a drainage pump;
• a drainage control system operatively connected to the drainage pump wherein the control system is configured to control the rate of drainage of cerebrospinal fluid from a patient;
• a cerebrospinal fluid collection reservoir fluidically coupled to the drainage and cooling catheter assembly and comprising a float sized to float freely on a volume of cerebrospinal fluid collected inside the collection reservoir;
• a coolant pump coupled to the drainage and cooling catheter assembly and configured to circulate a coolant between the drainage and cooling catheter assembly and the console;
• and
• a chiller assembly comprising a thermoelectric cooling unit.