Continuous cardiac output monitoring system
A continuous cardiac output monitoring system has been developed in the laboratory to allow the real-time measurement of the cardiac output. This form of continuous cardiac output measurement allows the doctor to view the beat-to-beat cardiac output and can be employed to measure artery constriction...
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| Veröffentlicht in: | Medical & biological engineering & computing 2001, Vol.39 (1), p.101-104 |
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| creator | TJIN, S. C HO, Y. C LAM, Y.-Z HAO, J NG, B. K |
| description | A continuous cardiac output monitoring system has been developed in the laboratory to allow the real-time measurement of the cardiac output. This form of continuous cardiac output measurement allows the doctor to view the beat-to-beat cardiac output and can be employed to measure artery constrictions as well. The sensor comprises a laser Doppler velocimeter and an impedance measurement unit. The laser Doppler velocimeter is capable of measuring bi-directional blood flow within the vessel while the impedance measurement unit determines the cross-sectional area of the vessel. In laboratory tests, it was demonstrated on a heart-lung machine that the product of the two parameters measured is proportional to the actual flow volume of up to 6 lmin(-1) with a mean percentage error of 12.4% and a mean square error of 0.09 (using the lmin(-1) scale) were obtained. This is significantly more accurate than the measurement made using the thermodilution cathether. |
| doi_str_mv | 10.1007/BF02345272 |
| format | Article |
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C ; HO, Y. C ; LAM, Y.-Z ; HAO, J ; NG, B. K</creator><creatorcontrib>TJIN, S. C ; HO, Y. C ; LAM, Y.-Z ; HAO, J ; NG, B. K</creatorcontrib><description>A continuous cardiac output monitoring system has been developed in the laboratory to allow the real-time measurement of the cardiac output. This form of continuous cardiac output measurement allows the doctor to view the beat-to-beat cardiac output and can be employed to measure artery constrictions as well. The sensor comprises a laser Doppler velocimeter and an impedance measurement unit. The laser Doppler velocimeter is capable of measuring bi-directional blood flow within the vessel while the impedance measurement unit determines the cross-sectional area of the vessel. In laboratory tests, it was demonstrated on a heart-lung machine that the product of the two parameters measured is proportional to the actual flow volume of up to 6 lmin(-1) with a mean percentage error of 12.4% and a mean square error of 0.09 (using the lmin(-1) scale) were obtained. This is significantly more accurate than the measurement made using the thermodilution cathether.</description><identifier>ISSN: 0140-0118</identifier><identifier>EISSN: 1741-0444</identifier><identifier>DOI: 10.1007/BF02345272</identifier><identifier>PMID: 11214260</identifier><language>eng</language><publisher>Heidelberg: Springer</publisher><subject>Anemometers ; Biological and medical sciences ; Cardiac Output ; Cardiovascular system ; Electric Impedance ; Heart Diseases - physiopathology ; Humans ; Investigative techniques, diagnostic techniques (general aspects) ; Laboratories ; Laser Doppler velocimeters ; Laser-Doppler Flowmetry ; Mean square errors ; Medical sciences ; Monitoring systems ; Monitoring, Physiologic - instrumentation ; Pathology. Cytology. Biochemistry. Spectrometry. 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C</creatorcontrib><creatorcontrib>HO, Y. C</creatorcontrib><creatorcontrib>LAM, Y.-Z</creatorcontrib><creatorcontrib>HAO, J</creatorcontrib><creatorcontrib>NG, B. K</creatorcontrib><title>Continuous cardiac output monitoring system</title><title>Medical & biological engineering & computing</title><addtitle>Med Biol Eng Comput</addtitle><description>A continuous cardiac output monitoring system has been developed in the laboratory to allow the real-time measurement of the cardiac output. This form of continuous cardiac output measurement allows the doctor to view the beat-to-beat cardiac output and can be employed to measure artery constrictions as well. The sensor comprises a laser Doppler velocimeter and an impedance measurement unit. The laser Doppler velocimeter is capable of measuring bi-directional blood flow within the vessel while the impedance measurement unit determines the cross-sectional area of the vessel. In laboratory tests, it was demonstrated on a heart-lung machine that the product of the two parameters measured is proportional to the actual flow volume of up to 6 lmin(-1) with a mean percentage error of 12.4% and a mean square error of 0.09 (using the lmin(-1) scale) were obtained. This is significantly more accurate than the measurement made using the thermodilution cathether.</description><subject>Anemometers</subject><subject>Biological and medical sciences</subject><subject>Cardiac Output</subject><subject>Cardiovascular system</subject><subject>Electric Impedance</subject><subject>Heart Diseases - physiopathology</subject><subject>Humans</subject><subject>Investigative techniques, diagnostic techniques (general aspects)</subject><subject>Laboratories</subject><subject>Laser Doppler velocimeters</subject><subject>Laser-Doppler Flowmetry</subject><subject>Mean square errors</subject><subject>Medical sciences</subject><subject>Monitoring systems</subject><subject>Monitoring, Physiologic - instrumentation</subject><subject>Pathology. Cytology. Biochemistry. Spectrometry. 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The laser Doppler velocimeter is capable of measuring bi-directional blood flow within the vessel while the impedance measurement unit determines the cross-sectional area of the vessel. In laboratory tests, it was demonstrated on a heart-lung machine that the product of the two parameters measured is proportional to the actual flow volume of up to 6 lmin(-1) with a mean percentage error of 12.4% and a mean square error of 0.09 (using the lmin(-1) scale) were obtained. This is significantly more accurate than the measurement made using the thermodilution cathether.</abstract><cop>Heidelberg</cop><pub>Springer</pub><pmid>11214260</pmid><doi>10.1007/BF02345272</doi><tpages>4</tpages></addata></record> |
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| identifier | ISSN: 0140-0118 |
| ispartof | Medical & biological engineering & computing, 2001, Vol.39 (1), p.101-104 |
| issn | 0140-0118 1741-0444 |
| language | eng |
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| source | MEDLINE; SpringerLink Journals |
| subjects | Anemometers Biological and medical sciences Cardiac Output Cardiovascular system Electric Impedance Heart Diseases - physiopathology Humans Investigative techniques, diagnostic techniques (general aspects) Laboratories Laser Doppler velocimeters Laser-Doppler Flowmetry Mean square errors Medical sciences Monitoring systems Monitoring, Physiologic - instrumentation Pathology. Cytology. Biochemistry. Spectrometry. Miscellaneous investigative techniques Sensitivity and Specificity Signal Processing, Computer-Assisted Ultrasonic investigative techniques Velocity measurement |
| title | Continuous cardiac output monitoring system |
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