CA2169374A1 - Method and apparatus for measuring continuous blood flow at low power - Google Patents
Method and apparatus for measuring continuous blood flow at low powerInfo
- Publication number
- CA2169374A1 CA2169374A1 CA002169374A CA2169374A CA2169374A1 CA 2169374 A1 CA2169374 A1 CA 2169374A1 CA 002169374 A CA002169374 A CA 002169374A CA 2169374 A CA2169374 A CA 2169374A CA 2169374 A1 CA2169374 A1 CA 2169374A1
- Authority
- CA
- Canada
- Prior art keywords
- level
- location
- blood flow
- determining
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims abstract description 69
- 230000017531 blood circulation Effects 0.000 title claims abstract description 66
- 230000008859 change Effects 0.000 claims abstract description 24
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 12
- 230000000747 cardiac effect Effects 0.000 claims description 105
- 239000008280 blood Substances 0.000 claims description 32
- 210000004369 blood Anatomy 0.000 claims description 32
- 238000010438 heat treatment Methods 0.000 claims description 27
- 210000005245 right atrium Anatomy 0.000 claims description 17
- 230000000241 respiratory effect Effects 0.000 claims description 16
- 210000005241 right ventricle Anatomy 0.000 claims description 10
- 210000001147 pulmonary artery Anatomy 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 238000012935 Averaging Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 3
- 238000003780 insertion Methods 0.000 claims 2
- 230000037431 insertion Effects 0.000 claims 2
- 230000008569 process Effects 0.000 description 22
- 238000005259 measurement Methods 0.000 description 20
- 239000012530 fluid Substances 0.000 description 15
- 238000013480 data collection Methods 0.000 description 8
- 230000002596 correlated effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000000875 corresponding effect Effects 0.000 description 3
- 210000004072 lung Anatomy 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 206010067171 Regurgitation Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 210000000709 aorta Anatomy 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 210000002318 cardia Anatomy 0.000 description 1
- 210000005242 cardiac chamber Anatomy 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000010247 heart contraction Effects 0.000 description 1
- 210000005246 left atrium Anatomy 0.000 description 1
- 210000005240 left ventricle Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002685 pulmonary effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
- A61B5/026—Measuring blood flow
- A61B5/0275—Measuring blood flow using tracers, e.g. dye dilution
- A61B5/028—Measuring blood flow using tracers, e.g. dye dilution by thermo-dilution
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
- A61B5/026—Measuring blood flow
- A61B5/029—Measuring blood output from the heart, e.g. minute volume
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hematology (AREA)
- Cardiology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Physiology (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/106,068 US5797398A (en) | 1993-08-13 | 1993-08-13 | Method and apparatus for measuring continuous blood flow at low power |
| US08/106,068 | 1993-08-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2169374A1 true CA2169374A1 (en) | 1995-02-23 |
Family
ID=22309307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002169374A Abandoned CA2169374A1 (en) | 1993-08-13 | 1994-08-11 | Method and apparatus for measuring continuous blood flow at low power |
Country Status (5)
| Country | Link |
|---|---|
| US (6) | US5797398A (en, 2012) |
| EP (1) | EP0712290A1 (en, 2012) |
| JP (2) | JP3557211B2 (en, 2012) |
| CA (1) | CA2169374A1 (en, 2012) |
| WO (1) | WO1995005115A2 (en, 2012) |
Families Citing this family (104)
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| US5174299A (en) * | 1991-08-12 | 1992-12-29 | Cardiac Pacemakers, Inc. | Thermocouple-based blood flow sensor |
| US5217019A (en) * | 1991-12-27 | 1993-06-08 | Abbott Laboratories | Apparatus and method for continuously monitoring cardiac output |
| US5305760A (en) * | 1992-02-07 | 1994-04-26 | Interflo Medical Inc. | Method for rejecting electrical interference from physiological measurements |
| US5797398A (en) * | 1993-08-13 | 1998-08-25 | Thermal Technologies, Inc. | Method and apparatus for measuring continuous blood flow at low power |
| US5509424A (en) * | 1994-01-28 | 1996-04-23 | Aws Salim Nashef | Continuous cardiac output monitoring system |
-
1993
- 1993-08-13 US US08/106,068 patent/US5797398A/en not_active Expired - Lifetime
-
1994
- 1994-08-11 CA CA002169374A patent/CA2169374A1/en not_active Abandoned
- 1994-08-11 JP JP50706695A patent/JP3557211B2/ja not_active Expired - Fee Related
- 1994-08-11 EP EP94925821A patent/EP0712290A1/en not_active Ceased
- 1994-08-11 WO PCT/US1994/009064 patent/WO1995005115A2/en not_active Application Discontinuation
-
1995
- 1995-05-24 US US08/449,205 patent/US5692514A/en not_active Expired - Lifetime
-
1997
- 1997-10-07 US US08/946,366 patent/US6203501B1/en not_active Expired - Fee Related
- 1997-10-07 US US08/946,367 patent/US6165132A/en not_active Expired - Fee Related
-
2000
- 2000-12-08 US US09/733,595 patent/US6565516B2/en not_active Expired - Fee Related
-
2003
- 2003-02-11 US US10/364,773 patent/US6913576B2/en not_active Expired - Fee Related
-
2004
- 2004-03-09 JP JP2004065117A patent/JP2004195251A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO1995005115A3 (en) | 1995-04-13 |
| US5797398A (en) | 1998-08-25 |
| US6203501B1 (en) | 2001-03-20 |
| JP2004195251A (ja) | 2004-07-15 |
| US20010000792A1 (en) | 2001-05-03 |
| JP3557211B2 (ja) | 2004-08-25 |
| EP0712290A4 (en, 2012) | 1996-07-03 |
| EP0712290A1 (en) | 1996-05-22 |
| US6913576B2 (en) | 2005-07-05 |
| US5692514A (en) | 1997-12-02 |
| US20030120162A1 (en) | 2003-06-26 |
| WO1995005115A2 (en) | 1995-02-23 |
| JPH09501591A (ja) | 1997-02-18 |
| US6165132A (en) | 2000-12-26 |
| US6565516B2 (en) | 2003-05-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |