An optical device to measure blood components by a photoplethysmographic method

Kraitl, J.; Ewald, Hartmut; Gehring, Hartmut

doi:10.1088/1464-4258/7/6/010

Cited by 46 publications

(16 citation statements)

References 10 publications

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“…Activation of the sympathetic nerve leads to vasoconstriction. This is the result of low compliance (high resistance) in the arterial system and reduction in blood flow in tissue, which results in the increase of I T and reduction of I S 9,26-28…”

Section: Methodsmentioning

confidence: 99%

Non-Invasive Estimation of Systolic Blood Pressure and Diastolic Blood Pressure Using Photoplethysmograph Components

Jeong

Jun

et al. 2010

Yonsei Med J

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PurposePhotoplethysmography (PPG) is a noninvasive optical technology that detects changes in blood volume in the vascular system. This study aimed to investigate the possibilities of monitoring the cardiovascular system status by using PPG.Materials and MethodsForced hemodynamic changes were induced using cardiac stimulants; dopamine and epinephrine, and PPG components were recorded by a noninvasive method at the peripheral blood vessels. The results were compared among 6 dogs. Endotracheal intubation was performed after an intramuscular injection of 25 mg/kg ketamine sulfate, and anesthesia was maintained with 2% enflurane. After stabilizing the animals for 15 min, 16 mg/mL diluted dopamine was injected into a vein for 2 min at 20 µg/kg· min-1 by using an infusion pump. Thereafter, the infusion pump was stopped, and 1 mg epinephrine was injected intravenously. Fluid administration was controlled to minimize preload change in blood pressure.ResultsAfter stimulant administration, systolic blood pressure (SBP) and diastolic blood pressures (DBP) increased. The direct current (DC) component, which reflects changes in blood volume, decreased while the alternating current (AC) component, which reflects changes in vascular compliance and resistance, increased. The correlation coefficient between SBP and the foot of the DC component was 0.939 (p < 0.01), while it was 0.942 (p < 0.01) for DBP and the peak of the DC component. The AC component could predict the increase in vascular resistance from a stable pulse blood volume, even with increased pulse pressure.ConclusionsThese results support the possibility that PPG components may be used for easy and noninvasive measurement of hemodynamic changes in the cardiovascular system.

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Section: Methodsmentioning

confidence: 99%

Non-Invasive Estimation of Systolic Blood Pressure and Diastolic Blood Pressure Using Photoplethysmograph Components

Jeong

Jun

et al. 2010

Yonsei Med J

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“…The basic principal of OxyTrue Hb® is a four wavelength measurement in the range of 600nm to 1400nm [2,3]. To enable the possibility to measure also the hemoglobin derivate MetHb a change in the sensor setup was necessary.…”

Section: Non-invasive Determination Of the Methemoglobinmentioning

confidence: 99%

Novel multi wavelength sensor concept to detect total hemoglobin concentration, methemoglobin and oxygen saturation

et al. 2015

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“…The elementary component of red blood cells is Hemoglobin (H) and a main parameter which its concentration is for determining whether the blood components are healthy or not [1]? Another important parameter to determine the capability of oxygen transportation in blood is the Hb concentration in human blood [2].…”

Section: Introductionmentioning

confidence: 99%

“…Another important parameter to determine the capability of oxygen transportation in blood is the Hb concentration in human blood [2]. Anemia (lower hemoglobin concentration) and polycythemia (higher hemoglobin concentration) can be diagnosed and monitored using this information [1]. It is also possible to observe imminent postoperative bleedings and autologous re-transfusions [2].…”

Section: Introductionmentioning

confidence: 99%