Progress Seminar 2015.10.30 신희안

연구 진행 상황 보고서 재난 대응 장비 인공 심폐기 어지럼증 심전도 신호처리 2주전 계획 연구 결과 문제점 및 대책 시나리오 수정 산소포화도 정리 회전판 제질 선택 Flow Chart 작성 중 문제점 및 대책 목표 및 계획 LCD 구동 펌프 성능 곡선 회로 구성 소자 선택 및 확정 월요일 첫 미팅

Heads And Plates

SAME EFFECTIVE AREA! Biopump Terumo Magnet Size of Heads Inner Diameter: 30mm Outer Diameter: 70mm Inner Diameter: 31.72mm Outer Diameter: 70.28mm SAME EFFECTIVE AREA!

Magnet Strength of Plates Stainless Plate Aluminum Plate Bio Pump Plate 4200 Gauss 5000 Gauss 1600 Gauss

Magnet Strength of Plates Terumo Bio Pump 서강대 550 Gauss 420 Gauss 800Gauss

Magnet Selection 자석 분포 불균등의 효과 감소 >도넛형태의 이유? 2t (1600~1800Gauss), 5t (3600~3800Gauss), 10t (4800~5000Gauss)

Magnet Selection 판 두께 변경 2t 5t 10t 2 5t

Plate Material Selection Stainless 420 Permeability: 950 Stainless: High Durability

SvO2 Measurement

Pulmonary Artery Pulmonary Artery All blood “mixed” after circulating “all” tissues in body

:Mixed Venous Oxygen Saturation What is SvO2? :Mixed Venous Oxygen Saturation Oxygen Saturation of Pulmonary Artery   Normal SvO2 = 60%~80% Average amount of oxygen remaining after all tissues oxygen consumption Determine the Cardiac Output & Oxygen Delivery

Pulsatile Oximeter Saturated Oxygen Concentration (SaO2)

Absorption Characteristics Oxyhemoglobin VS Deoxyhemoglobin Two Variables -> Two Equations   Red Light Infra Red Light

Absorption by TUBE & BLOOD (Absorption of TUBE known) Pulsatile Oximeter Pulsatile Flow: Increases travel length of wavelength Increased Absorption (AC Component) Without Pulse: Almost no change of travel length Constant Absorption (DC Component) Artery Pulsatile Flow Absorption by TUBE & BLOOD (Absorption of TUBE known) Measures Saturated Oxygen Concentration (SaO2)

Invasive Measurements Blood Sampling Fiber-optic Catheter Sample from Pulmonary Artery Error caused from sampling from unhomogenized blood Intermittent Relative O2 Concentration: Spectrophotometry + Measurement of Hematocrit Almost Continuous Invasive

Fiber-optic Catheter Transmitting Fiber Optic: Transmit various wavelengths in red and infrared(Diode) Illuminate the blood Receiving Fiber Optic: Transmit reflected light to photodetector Light Intensity (cf. Pulsatile Oximeter)

Increased SvO2 indicates: SvO2 Indications Increased SvO2 indicates: Increased O2 Delivery Decreased O2 Demand Decreased SvO2 indicates: Decreased O2 Delivery Decreased Hemoglobin Concentration Decreased SaO2 Not Enough Cardiac Output Increased O2 Demand

Non Invasive Measurement https://www.youtube.com/watch?v=KCJbv_lYB8E&feature=youtu.be