Cool catheter: Device developed to control induced hypothermia precisely. (Application Ideas).Neurosurgeons often use induced hypothermia to reduce tissue and organ damage during periods of ischemia (e.g. acute stroke and heart attack). conventional methods for cooling the body use cooling blankets and other exodermic treatments. These methods lack precise control of temperature and cooling rate. Innercool Therapies Inc, San Diego, CA, developed its celsius control System for cooling (& rewarming) the body intravenously through a catheter inserted into the inferior vena cava inferior vena cava n. Abbr. IVC A large vein formed by the union of the two common iliac veins that receives blood from the lower limbs and the pelvic and abdominal viscera and empties into the right atrium of the heart. via the femoral vein femoral vein n. A vein that accompanies the femoral artery in the same sheath and becomes the external iliac vein. . The disposable single-use catheter assembly exchanges heat between a closed loop saline solution saline solution n. A solution of any salt, usually an isotonic sodium chloride solution. Also called salt solution. Saline solution A solution of sterile water and salt used in a variety of medical procedures. (heat exchange fluid) and the blood stream. The distal end of the catheter has a Temperature control Element that has been designed with circular "bellow bellow one of the voices of cattle. Usually refers to the arrogant call of the bull used to announce territorial rights. Abnormalities of the voice include hoarseness as in rabies, or continuous repetition as in nervous acetonemia. See also low, moo. " segments that provide flexibility and durability so that the catheter may be guided to its location in the vascular system. Engineers used 3-D computer flow modeling to optimize the surface features of the heat exchanger to induce gentle mixing of the blood around the heat exchanger and enhance the transfer of energy. A proprietary alloy allows the system to operate over a temperature range from 0[degrees]C to 42[degrees]C while maintaining clinically important physical properties of catheter handling and guiding capabilities. Hemocompatibility is enhanced through the use of covalently bonded heparin. As for the console, the engineers developed a closed-loop system that accurately controls the induction and maintenance of the hypothermia hypothermia Abnormally low body temperature, with slowing of physiological activity. It is artificially induced (usually with ice baths) for certain surgical procedures and cancer treatments. delivery. The company's well-tuned PID controller adapts to the patients' physiology to prevent any temperature overshoots while providing a very responsive system. A computer model was developed to simulate and predict a patient's temperature response from thermal inputs from an endovascular catheter under varying environmental situations. This model was then optimized to create the adaptive control algorithm This system has been undergoing clinical trials in cerebrovascular cer·e·bro·vas·cu·lar adj. Relating to the blood supply to the brain, particularly with reference to pathological changes. cerebrovascular pertaining to the blood vessels of the cerebrum or brain. aneurysm aneurysm (ăn`y  rĭzəm), localized dilatation of a blood vessel, particularly an artery, or the heart. surgery, fever therapy, and acute ischemic stroke. Other trials
in the works include cardiac surgery.
For more information: Circle 400--Innercool Therapies Inc, or connect directly to their website via the Online Reader Service Program at www.rsleads.com/205md-400 |
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