US5486208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for controlling a patient's body temperature by in situ blood temperature modification
Assignee: Zoll Circulation Inc
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Filing: 1994-10-18
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Granted: 1996-01-23
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Expires: 2014-10-18
Abstract
Abstract The present invention provides a method and apparatus for controlling the internal body temperature of a patient. According to the present invention, a catheter is inserted through an incision into a large blood vessel of a patient. By selectively heating or cooling a portion of the catheter lying within the blood vessel, heat may be transferred to or from blood flowing within the vessel and the patient's body temperature may thereby be increased or decreased as desired. The invention will find use in treating undesirable conditions of hypothermia and hyperthermia, or for inducing a condition of artificial hypothermia when desired.
Inventors
- 👤 Robert Ginsburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:42
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362; A61N1/365; A61N1/36514; A61F; A61F7/00; A61F7/12; A61F7/123; A61N1/36585; A61B; A61B18/00; A61B18/04; A61B18/08; A61B18/082; A61B18/18; A61B18/20; A61B18/22; A61B18/24; A61B18/245; A61B17/00; A61B2017/00017; A61B2017/00022; A61B2017/00084; A61B17/22; A61B2017/22051; A61B2018/00053; A61B2018/00059; A61B2018/00089; A61B2018/00095; A61F2007/0054; A61F7/007; A61F2007/0071; A61F2007/126; A61M; A61M25/00; A61M25/10; A61M2025/1043; A61M2025/1072; A61M2025/1086; A61M25/1011
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
A method for increasing a patient's body temperature by warming blood within the patient, the method comprising the steps of: inserting a catheter having a heating element into a blood vessel of the patient so that the heating element lies within the blood vessel; providing heat transfer fins projecting radially outward from the catheter in the region of the heating element; transferring heat to the blood through the heating element, wherein heat transfer is enhanced by the presence of the heat transfer fins.
Claim 2
Independent Claim
83 words
A method for increasing a patient's body temperature by warming blood within the patient, the method comprising the steps of: inserting a catheter having a heating element into a blood vessel of the patient so that the heating element lies within the blood vessel; providing heat transfer fins projecting radially outward from the catheter in the region of the heating element; transferring heat to the blood through the heating element, wherein heat transfer is enhanced by the presence of the heat transfer fins.
Claim 3
Dependent Claim
28 words
A method as in claim 1, wherein the heating element is a resistance heating element and heat is transferred by conducting electrical current through the resistance heating element.
Claim 4
Dependent Claim
49 words
A method as in claim 1, further comprising inflating a balloon around the heating element with a heat transmissive fluid, wherein the heat transfer fins project radially outward from the balloon and the heat transmissive transfer fluid effects heat transfer from the heating element to the heat transfer fins.
Claim 5
Dependent Claim
25 words
A method as in claim 1 wherein the heating element is heated to a temperature not exceeding 43° C. to transfer heat to the blood.
Claim 6
Independent Claim
90 words
A method for treating a patient suffering from hypothermia by warming blood within the patient, the method comprising the steps of: inserting a catheter having a heating element into a blood vessel of the patient so that the heating element lies within the blood vessel; providing heat transfer fins projecting radially outward from the catheter in the region of the heating element; transferring heat to the blood through the heating element to increase the patient's body temperature, wherein heat transfer is enhanced by the presence of the heat transfer fins.
Claim 7
Independent Claim
90 words
A method for treating a patient suffering from hypothermia by warming blood within the patient, the method comprising the steps of: inserting a catheter having a heating element into a blood vessel of the patient so that the heating element lies within the blood vessel; providing heat transfer fins projecting radially outward from the catheter in the region of the heating element; transferring heat to the blood through the heating element to increase the patient's body temperature, wherein heat transfer is enhanced by the presence of the heat transfer fins.
Claim 8
Dependent Claim
28 words
A method as in claim 5, wherein the heating element is a resistance heating element and heat is transferred by conducting electrical current through the resistance heating element.
Claim 9
Dependent Claim
48 words
A method as in claim 5, further comprising inflating a balloon around the heating element with a heat transmissive fluid, wherein the heat transfer fins project radially outward from the balloon and the heat transmissive fluid effects heat transfer from the heating element to the heat transfer fins.
References Cited (Backward Citations)
US2308484A
Cited
US3425419A
Cited
US4672962A
Cited
US5019075A
Cited
US4748979A
Cited
US4754752A
Cited
US4899741A
Cited
US5106360A
Cited
US5041089A
Cited
US5151100A
Cited
US5191883A
Cited
WO1991005528A1
Cited
US5147385A
Cited
US5092841A
Cited
US5196024A
Cited
US5250070A
Cited
US5211631A
Cited
US5248312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-22 | 1999-07-24 | 2000-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-22 | 2003-07-24 | 2004-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-22 | 2007-07-24 | 2008-01-23 | $7700.00 | Window Closed / Lapsed |