A New Method of Selective, Rapid Cooling of the Brain: An Experimental Study

Allers, Mats; Boris-Möller, Fredrik; Lunderquist, Anders; Wieloch, Tadeusz
March 2006
CardioVascular & Interventional Radiology;Mar/Apr2006, Vol. 29 Issue 2, p260
Academic Journal
Purpose: To determine whether retrograde perfusion of cooled blood into one internal jugular vein (IJV) in the pig can selectively reduce the brain temperature without affecting the core body temperature (CBT). Methods: In 7 domestic pigs, the left IJV was catheterized on one side and a catheter placed with the tip immediately below the rete mirabile. Thermistors were placed in both brain hemispheres and the brain temperature continuously registered. Thermistors placed in the rectum registered the CBT. From a catheter in the right femoral vein blood was aspirated with the aid of a roller pump, passed through a cooling device, and infused into the catheter in the left IJV at an initial rate of 200 ml/min. Results: Immediately after the start of the infusion of cooled blood (13.8°C) into the IJV, the right brain temperature started to drop from its initial 37.9°C and reached 32°C within 5 min. By increasing the temperature of the perfusate a further drop in the brain temperature was avoided and the brain temperature could be kept around 32°C during the experiment. In 4 of the animals a heating blanket was sufficient to compensate for the slight drop in CBT during the cooling period. Conclusions: We conclude that brain temperature can be reduced in the pig by retrograde perfusion of the internal jugular vein with cooled blood and that the core body temperature can be maintained with the aid of a heating blanket.


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