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Unformatted text preview: Augmented Leads Precordial Limb Leads Other Biopotential Measuring Devices pH Electrode ' 61.5( ) glass E E pH = + CO 2 Electrode O 2 Electrode Transistor/Enzymatic Detection As a positive voltage is applied between the source and gate, the drain current rises. (underneath the oxide) a- The membrane modulates current between source and drain b – A stretched ISFET maximizes the spacing between the sample and electric connections Optical Sources/Sensors He:Ne Laser Photomultiplier Tube (PMT) Spectrophotometry Absorbance: A aLC = Electron Tube Beer’s Law: 10 A I I- = (Continuous Dynodes) Fluorometry (measure of fluorescence) Matrix Laser Assisted Blood Cell Counter Desorption/Ionization Photoplethsmography THb = HbO 2 + Hb + HbCO + metHb ; [ ] [ ] 2 2 HbO O sat THb = ( 29 ( 29 ( 29 ( 29 2 2 ( ) ( ) 1.0 o o r r o r A A a C a C a C C λ λ λ λ λ = + + = Hematology HCT (Hematocrit) - % vol RBC’s - ~40% Flow Cytometry Low angle scatter – cell volume High angle scatter – cell type...
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This note was uploaded on 02/09/2010 for the course MSE 518248 taught by Professor Cahler during the Spring '10 term at University of Balamand.
- Spring '10