초록 ▼

A catheter is adapted to exchange heat with a body fluid, such as blood, flowing in a body conduit, such as a blood vessel. The catheter includes a shaft with a heat exchange region disposed at its distal end. This region may include at least one balloon which is adapted to receive a remotely cooled

A catheter is adapted to exchange heat with a body fluid, such as blood, flowing in a body conduit, such as a blood vessel. The catheter includes a shaft with a heat exchange region disposed at its distal end. This region may include at least one balloon which is adapted to receive a remotely cooled heat exchange fluid preferably flowing in a direction counter to that of the body fluid. Embodiments including multiple balloons enhance the surface area of contact, and the mixing of both the heat exchange and the body fluid. The catheter can be positioned to produce hypothermia in a selective area of the body without cooling the entire body system. It is of particular advantage in brain surgeries where stroke, trauma or cryogenic tumors can best be addressed under hypothermic conditions. Heat pipe technology can be used to form a heat pipe heat exchange catheter. The heat pipe heat exchange catheter includes metallic bellows which allow for flexibility. The temperature control source can be portable to enable the heat pipe heat exchange catheter to be used in the ambulatory environment.

대표청구항 ▼

A catheter is adapted to exchange heat with a body fluid, such as blood, flowing in a body conduit, such as a blood vessel. The catheter includes a shaft with a heat exchange region disposed at its distal end. This region may include at least one balloon which is adapted to receive a remotely cooled

A catheter is adapted to exchange heat with a body fluid, such as blood, flowing in a body conduit, such as a blood vessel. The catheter includes a shaft with a heat exchange region disposed at its distal end. This region may include at least one balloon which is adapted to receive a remotely cooled heat exchange fluid preferably flowing in a direction counter to that of the body fluid. Embodiments including multiple balloons enhance the surface area of contact, and the mixing of both the heat exchange and the body fluid. The catheter can be positioned to produce hypothermia in a selective area of the body without cooling the entire body system. It is of particular advantage in brain surgeries where stroke, trauma or cryogenic tumors can best be addressed under hypothermic conditions. Heat pipe technology can be used to form a heat pipe heat exchange catheter. The heat pipe heat exchange catheter includes metallic bellows which allow for flexibility. The temperature control source can be portable to enable the heat pipe heat exchange catheter to be used in the ambulatory environment. 0, Samuels, 600/200; US-5876367, 19990300, Kaganov et al., 604/008; US-5893867, 19990400, Bagaoisan et al., 606/198; US-5895399, 19990400, Barbut et al., 606/159; US-5902263, 19990500, Patterson et al., 604/022; US-5906618, 19990500, Larson, III, 606/108; US-5908435, 19990600, Samuels, 606/200; US-5910154, 19990600, Tsugita et al., 606/200; US-5911734, 19990600, Tsugita et al., 606/200; US-5916193, 19990600, Stevens et al., 604/053; US-5925016, 19990700, Chrnenky et al., 604/096; US-5925060, 19990700, Forber, 606/191; US-5925062, 19990700, Purdy, 606/200; US-5925063, 19990700, Khosravi, 606/200; US-5928203, 19990700, Davey et al., 604/247; US-5928218, 19990700, Gelbfish, 604/540; US-5934284, 19990800, Plaia et al., 128/898; US-5935139, 19990800, Bates, 606/159; US-5938645, 19990800, Gordon, 604/264; US-5941869, 19990800, Patterson et al., 604/508; US-5941896, 19990800, Kerr, 606/200; US-5947995, 19990900, Samuels, 606/200; US-5951585, 19990900, Cathcart et al., 606/198; US-5954745, 19990900, Gertler et al., 606/200; US-5976172, 19991100, Homsma et al., 606/200; US-5980555, 19991100, Barbut et al.; US-5989210, 19991100, Morris et al., 604/022; US-5989271, 19991100, Bonnette et al., 606/159; US-5989281, 19991100, Barbut et al., 606/200; US-5993469, 19991100, McKenzie et al., 606/159; US-5997557, 19991200, Barbut et al., 606/159; US-6001118, 19991200, Daniel et al., 606/200; US-6007557, 19991200, Ambrisco et al., 606/200; US-6010522, 20000100, Barbut et al., 606/200; US-6013085, 20000100, Howard, 606/108; US-6027520, 20000200, Tsugita et al., 606/200; US-6042598, 20000300, Tsugita et al.; US-6051014, 20000400, Jang, 606/200; US-6051015, 20000400, Maahs, 606/200; US-6053932, 20000400, Daniel et al., 606/200; US-6059814, 20000500, Ladd, 606/200; US-6066149, 20000500, Samson et al., 606/200; US-6068645, 20000500, Tu, 606/200; US-6086605, 20000700, Barbut