Claims
- 1. A device for heating or cooling a surrounding fluid in a feeding vessel, comprising:a catheter assembly capable of insertion to a selected feeding vessel in the vascular system of a patient, including: a heat transfer element at a distal end of the catheter assembly, the heat transfer element having a plurality of exterior surface irregularities shaped and arranged to create turbulence in a surrounding fluid, the surface irregularities having a depth at least equal to the boundary layer thickness of flow of the surrounding fluid in the feeding vessel, the surface irregularities comprising a helical ridge and a helical groove formed on each of successive heat transfer segments, the helical ridge on each heat transfer segment has an opposite helical twist to the helical ridges on adjacent heat transfer segments; a supply catheter to deliver a working fluid to an interior of the heat transfer element; a return catheter to return a working fluid from the interior of the heat transfer element; and a drug delivery catheter running substantially parallel to the axis of the catheter assembly.
- 2. A method for selectively controlling the temperature of a selected volume of blood in a patient, comprising:introducing a catheter assembly into a blood vessel feeding a selected volume of blood in a patient; delivering a working fluid through a supply catheter in the catheter assembly and returning the working fluid through a return catheter in the catheter assembly; transferring heat between a heat transfer element forming a distal end of the catheter assembly and the volume of blood in the feeding vessel; delivering a liquid through a drug delivery catheter to the volume of blood in the feeding vessel; creating mixing around a plurality of surface irregularities that comprise a plurality of segments of helical ridges and grooves having alternating directions of helical rotation on the heat transfer element by establishing repetitively alternating directions of helical blood flow with the alternating helical rotations of ridges and grooves.
CROSS REFERENCE TO RELATED APPLICATIONS
This is a continuation patent application of co-pending U.S. patent application Ser. No. 09/246,788 filed on Feb. 9, 1999 entitled “Method and Device for Applications of Selective Organ Cooling”, Now U.S. Pat. No. 6,491,716 which is a continuation-in-part patent application of U.S. patent application Ser. No. 09/103,342, filed on Jun. 23, 1998, and entitled “Selective Organ Cooling Catheter and Method of Using the Same”, Now U.S. Pat. No. 6,096,068; Ser. No. 09/052,545, filed on Mar. 31, 1998, and entitled “Circulating Fluid Hypothermia Method and Apparatus”, Now U.S. Pat. No. 6,231,595; Ser. No. 09/047,012, filed on Mar. 24, 1998, and entitled “Improved Selective Organ Hypothermia Method and Apparatus”, now U.S. Pat. No. 5,957,963; Ser. No. 09/215,038, filed on Dec. 16, 1998, and entitled “An Inflatable Catheter for Selective Organ Heating and Cooling and Method of Using the Same”, now U.S. Pat. No. 6,261,312; Ser. No. 09/215,039, filed on Dec. 16, 1998, and entitled “Method for Low Temperature Thrombolysis and Low Temperature Thrombolytic Agent with Selective Organ Control”, now U.S. Pat. No. 6,251,129; Ser. No. 09/232,177, filed on Jan. 15, 1999, and entitled “Method and Apparatus for Location and Temperature Specific Drug Action such as Thrombolysis”, now U.S. Pat. No. 6,245,095, the entirety of each being incorporated by reference herein.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
5902268 |
Saab |
May 1999 |
A |
6497716 |
Green et al. |
Dec 2002 |
B1 |
Continuations (1)
|
Number |
Date |
Country |
Parent |
09/246788 |
Feb 1999 |
US |
Child |
10/210819 |
|
US |
Continuation in Parts (6)
|
Number |
Date |
Country |
Parent |
09/232177 |
Jan 1999 |
US |
Child |
09/246788 |
|
US |
Parent |
09/215039 |
Dec 1998 |
US |
Child |
09/232177 |
|
US |
Parent |
09/215038 |
Dec 1998 |
US |
Child |
09/215039 |
|
US |
Parent |
09/052545 |
Mar 1998 |
US |
Child |
09/215038 |
|
US |
Parent |
09/047012 |
Mar 1998 |
US |
Child |
09/052545 |
|
US |
Parent |
09/103342 |
Jun 1998 |
US |
Child |
09/246788 |
|
US |