PiCCO, CeVOX & LiMON Technology Training in methodology, operation, application and safety Icons & Navigation i More information (within the presentation) More information (external documents) Video Back to start position Start animation 2 Overview A. Introduction B. Disposables C. Start-Up D. Measurement E. Parameters F. PiCCO Strategies 3 User orientated presentation Basic nurse training Basic medical training Intensive care nurse training Intensive care medical training 4 A. Introduction 5 History of the PiCCO-Technology • Intelligent hemodynamic monitoring • Paradigm shift in hemodynamic monitoring • Integration into patient monitoring monitors • Most widely used less-invasive method PulsioFlex™ 2010 PiCCO2 2007 Dräger Smart Pod 2005 PiCCO 1997 PiCCO plus 2002 COLD System 1990 6 Philips PiCCO Module 2003 PULSION – Made in Germany PULSION Head Office • Medical device manufacturer based in Munich, founded in 1990 • Production, development, management, marketing and distribution in Munich Clean Room • Subsidiaries in USA, France, Spain, United Kingdom, Benelux, Poland, Austria and Switzerland • Distribution and licensing worldwide Production 7 Why Monitor Hemodynamics? • What are hemodynamics? • When is hemodynamic monitoring indicated? • What types of hemodynamic monitoring are there? • Why do you need the PiCCO-Technology? Illustrative case 8 Key questions Is the O2 supply sufficient? Volume or catecholamine's ? Is there Pulmonary edema? 9 What are Hemodynamics? O2 uptake Gas exchange O2 transport O2 delivery O2 consumption Macro-circulation (Cardiac Output, Hb) Micro-circulation Cellular O2 consumption (ScVO2, PDRICG*) Maintenance of oxygen extraction! * Parameter is not available in the USA 10 Intervention Options - + Respiration - - + + Volume Catecholamines Volume loading? Volume withdrawal? Diuretics? Vasopressors? Vasodilators? Inotropes? The correct decision, early! 11 - + Hemoglobin Anatomy and physiology of the circulatory system Determinants of cardiac output: Preload: - Blood volume, blood available for pumping Afterload: - Resistance, against which the heart must pump Contractility: - Performance of the heart muscle Heart rate Circulatory model Flow is the result of: preload, afterload, contractility & heart rate 12 Hemodynamic Parameters O2 Delivery DO2 Gas exchange? SaO2 O2 Transport? Hb Flow? CI Stroke Volume SVI Preload GEDI SVV Lung ELWI PVPI* ! O2 Consumption Mixed- / CentralVenous O2-Saturation VO2 ScVO2 DO2 VO2 Frequency HR x Afterload MAP SVRI Contractility dPmx, CPI* CFI*, GEF* * Parameters are not available in the USA 13 Treatment strategies Sepsis Cardiac surgery Cardiology Neurosurgery/ Neurology /Stroke Burns Trauma 14 Monitoring and Diagnostic systems Diagnostics CO - Monitoring Doppler TTE/TEE CT/ MRI LiDCO rapid Diagnostics & Advanced Monitoring Vigileo Bioimpendance PulsioFlex Vigilance / PAC 15 PiCCO2 B. Disposables 16 PiCCO Catheter • For advanced hemodynamic monitoring with the PiCCO-Technology • Temperature sensor at the catheter tip for transpulmonary thermodilution • Pressure lumen for arterial pressure measurement • For use with • PiCCO2 • PiCCO plus • Philips PiCCO technology module and • Draeger Infinity® PiCCO SmartPod®. 17 PiCCO Catheter Placement Options A. Axilla Adult A. Brachial Proximal 4F - 16cm Adult distal (cubital) 4F - 22cm A. Femoral Adult 5F - 20cm Children/peds 3F - 07cm Adult 4F - 50cm* A. Radial 4F - 08cm * Product is not available in the USA 18 PiCCO Catheter Safety Tips • Catheter handling according to hospital hygiene policy • Latex and DEHP free • Remove catheter if there are any signs of inflammation/infection 19 CeVOX Probe* • Continuous monitoring of ScvO2 • Convenient application • Access via already placed standard CVC • Easy application • Continuous ScvO2 within minutes * Product is not available in the USA 20 CeVOX Probe Selection and Placement Remove slide clamp from CeVOX lumen Insert probe through the distal lumen of your CVC Secure CeVOX probe Luer lock to CVC distal Luer lock Tip of CeVOX probe is positioned 2.5 ± 0.5 cm past the tip of the CVC No stopcock / 3 way tap in-between probe and CVC! Remove slide clamp from CeVOX lumen! * Product is not available in the USA 21 Connect the CeVOX probe to the optical module and perform an in-vivo calibration CeVOX-probe indicator CeVOX* CVC-lumen • Blood samples for in-vivo calibration are withdrawn from the Y-connector at the end of the CeVOX probe. (if not possible then from the next (medial) lumen from the same CVC) • In-vitro calibration (pre-calibration) is not validated and raises hygiene issues • Keep the CeVOX lumen open by continuous flow • • Online CVP via pressure transducer • 3ml/h flush solution via syringe pump Infusions and medication can be administered via the CeVOX-CVC lumen • No catecholamines! * Product is not available in the USA 22 CeVOX* probe safety tips • CeVOX probe and CVC handling according to hospital policy • Latex and DEHP- free • Remove CeVOX probe together with CVC if there are signs of inflammation at the injection site or signs of catheter related infection • Remove slide clamp from CeVOX lumen! • Do not place a stopcock (3 way tap) between probe and CVC * Product is not available in the USA 23 PiCCO Pressure Transducer 24 PiCCO Pressure Transducer • PV8215 PiCCO transducer incl. PV 4046 • PV8215-2 2in1 PiCCO transducer with continuous AP and CVP incl. PV4046 • PV8215CVP PiCCO transducer with discontinuous CVP incl. PV4046 • PV8615 CVP online transducer • DPT-100 In-Line transducer • PV4046 Injectate sensor housing PV82xx transducers are not available in all markets. Alternative products are available on request. 25 Movie Transducer Safety Tips • Change transducer according to hospital policy (usually around every 96 hours) • PV82XX is Latex and DEHP free • Use only PULSION approved transducers for PiCCO monitoring (CE-Conformity). 26 Injectate Sensor Housing PV4046 • Measures the temperature of injectate at time of injection • Included in PiCCO transducer kits • Also available separately 27 C. Start-UP 28 Connectivity PiCCO2 PiCCO plus Philips IntelliVue Model Dräger Infinity PiCCO SmartPod 29 Connectivity PiCCO2 Flush bag LiMON Sensor 1 CeVOX Module (Art. No. PC3015) 1a 1a LiMON Module* CeVOX probe via standard CVC (Art. No. PC5100) 2 Injectate-Sensor cable (Art. No. PC80109) 1 3 Temperature cable (Art. No. PC80150) 2 4 Pressure cable 3 (Art. No. PMK-206) 4 PiCCO monitoring kit PiCCO catheter * Product is not available in the USA 30 Connectivity Philips IntelliVue Module Flush bag 1 Injectate -Sensor cable (Art. No. PC80109) 2 Temperature cable (Art. No. PC80150) 3 Pressure transducer cable (Art. No. PMK-206) 1 2 3 PiCCO catheter PiCCO monitoring Kit 31 Connectivity Dräger Infinity PiCCO SmartPod® 1 Injectate Sensor cable Flush bag (Art. No. PC80109) 2 Temperature cable (Art. No. PC80150) 1 3 Pressure transducer cable 2 (Art. No. PMK-206) To bedside monitor 3 Connected to the back PiCCO catheter PiCCO monitoring kit 32 Connectivity PiCCO plus PV8215 PV2015L20N 33 PiCCO2 Connectivity Input Output CeVOX ScvO2 Module PiCCO – Thermodilution PiCCO – arterial pressure AUX port for connection to bedside monitoring Online - CVP CVP AP 35 PiCCO2 Connectivity Interface Mains Lead 2x USB LAN RS 232 Mains connection PotentialEquilization 36 Start-Up 1. Power Switch 2. On/Off button 3. Alarm indicator 4. Charge warning light PiCCO2 1 2 4 3 Blinking = charging Permanently on = Fully charged 38 Screen layout Information bar Real-time arterial waveform Innovative visualizations Touch screen Direct access buttons & dial knob 39 Parameter fields Direct Access Buttons and Navigation Dial 1. On / Off 2. Help 3. Print 4. Suspend alarm 5. Back (to previous level) 6. Back (to main screen) 1 2 3 4 40 5 6 Help Function - Press Help button to open the help screen Setup scheme 41 Help Function Parameter information 42 Help Function Therapy algorithm 43 Help Function Help funktion Physiological parameter model with intervention options 44 Help Function How to contact PULSION and the PiCCO2 serial number 45 Help Function Press „Exit“ or “Next” to proceed to next screen 46 Zeroing of AP and CVP 47 • Zero pressures once per shift and as required • Manually enter CVP in mmHg • Continuous CVP can be monitored via a second transducer System Check 1 2 1 AP plausible? (PiCCO and patient monitor) 2 Systole identified? 3 3.. Blood temp (TB) plausible? 3 48 PiCCO2 Supports Your Decisions Spider Vision View the patient status at a glance Profile Detailed insight at a parameter level Trends Clinical course & treatment success 50 Configuration of Parameters Press on the parameter field on the right side of the screen to go to parameter configuration 51 Configuration of Alarms 80 65 52 Configuration of Normal and Target Values • Switch to target mode via Selection “Target Values” • Enter your target values • It is possible to adjust target ranges for each individual patient Normal values 53 Target values Configuration SpiderVision • Select the number of required arms • Place the parameters onto the arms by: 1. Selecting a SpiderVision parameter 2. Touching the parameter label onto the Spider arm 54 Configuration Trend Screen • Customizable trend screen with up to 8 parameters • Select: 55 - Trend period - Trend graphic or - Trend table D. Thermodilution 56 Principles of the PiCCO-Technology T P Injection t Thermodilution t Pulse contour analysis Calibration The PiCCO-Technology is a unique combination of two methods; • Firstly the hemodynamic and volumetric status is determined by transpulmonary thermodilution (TD). • Secondly arterial pulse contour is calibrated. 57 Thermodilution Detection Injection • • The indicator passes through heart and lungs. CO, Preload and Lung water are measured. 58 PiCCO2 Booklet Pulse Contour Analysis The second step is that arterial pulse contour is calibrated by TD - CO T •The systolic part of the curve, representing stroke volume, is calibrated. Injection t • Each new TD automatically recalibrates the pulse contour Calibration • PiCCO-PCCI is “beat to beat” P •Calibration also integrates the patients aortic compliance t 59 Workflow - Thermodilution PiCCO2 PiCCO plus Philips IntelliVue Model Dräger Infinity PiCCO SmartPod 60 Start thermodilution •1 Select the injectate volume • For an adult 15mls saline is recommended • In the „Measurement“ menu you will find the recommended volume 1 •2 Press „Start“ 2 Auto – Thermodilution mode (x in a row) 61 Thermodilution When „Wait“ is displayed in the TD window the blood temperature profile is being calculated. 1 Once the message ‘Inject xx ml’ appears, inject the saline bolus rapidly past the injectate sensor housing. 2 The word ‘Injection’ indicates that the monitor has recognized the bolus injection. 3 The thermodilution curve appears in the TD window. 4 The results are highlighted in green in the table above the thermodilution curve. 4 2 1 62 3 Selection of results • The TD results are averaged from the set of TD measurements. • CI, GEDI and ELWI should be within 10% of each other • Results that are outside this range should be excluded from the set of measurements. • Measurements can be excluded by double clicking on the results. • Excluded results are crossed out 63 Quality of the thermodilution 36,7° 36,8° Quality of thermodilution: ∆T =0.3°C Optimized when ∆T >0.3°C Good when ∆T >0.2°C Weak when ∆T <0.15°C ∆T = change in temperature - 36,9° 37° Optimize the thermodilution by: 36,7° - 36,8° 36,9° ∆T =0.14°C 37° 64 More injection volume Colder injection Faster injection Raising blood temperature if hypothermic (after surgery) ScvO2 Calibration • Press ScVO2 CAL to start calibration • The quality indicator should show a medium to high signal • Withdraw blood from the Y- connector of the CeVOX probe. Ensure that you get only blood and no infusion fluid. • Do a venous blood gas sample and flush the lumen with saline afterwards. • Press “Sample drawn” after withdrawing blood. • Enter the results of the BGA . • Press „Confirm“ • If DO2 and VO2 are enabled you need to enter the SaO2 (SpO2) value DO2 & VO2 Measurement 66 LiMON – PDRICG* • Press to go to LiMON calibration. • Attach the LiMON sensor to a well perfused finger. • Wait 3 minutes until the finger perfusion becomes adapted to the sensor. • Ensure that the sensor is not subjected to strong direct light. If necessary cover the sensor during the measurement of the PDRICG • SpO2 and perfusion level will be displayed. The signal should be stable. • Press Calc to calculate the ICG dose. • Select target concentration: 0.25mg/Kg or 0.5mg/Kg • Select the number and size of vials • Use XX mls ‘water for injection’ • ICG quantity: dose in mgs to inject • Volume: Volume in mls to inject * Parameter is not available in the USA 67 LiMON – PDRICG* 4 2 3 5 1. Prepare the calculated ICG bolus 2. Press ‘START’ 3. “Wait” will be displayed until the signal is stable. 4. Inject calculated volume of ICG. 5. Curve detected will be displayed 6. PDRICG reading will be displayed after 5 – 8 mins 7. Time of next possible measurement will be displayed. 6 7 * Parameter is not available in the USA 68 E. - Parameters 69 Therapy control Maintenance of oxygen extraction O2 uptake Gas exchange O2 transport Macro-hemodynamics O2 delivery O2 consumption Micro-circulation Cellular O2 consumption Options for Intervention - + Respiration - - + + Catecholamine Volume 70 - + Hemoglobin Main Parameters • ScvO2: Adequate global tissue oxygenation? • CI: Adequate flow? • GEDI: Adequate cardiac preload? • SVV/PPV: Volume responsiveness? • SVRI: Vasopressor therapy necessary? • ELWI: Lung edema? 71 Monitoring Strategy 1. Identification of the problem 3. Coordination of suitable interventions 5. Quality check 2. Identification of the cause 4. Goal directed therapy 72 Hemodynamic parameters O2 Delivery DO2 Gas exchange? SaO2 O2 Transport? Hb Flow? CI Stroke Volume SVI Preload GEDI SVV/PPV Lung ELWI PVPI* ! O2 Consumption Mixed- / CentralVenous O2-Saturation DO2 VO2 ScVO2 VO2 Organ function? Frequency HR x Afterload MAP SVRI Contractility dPmx, CPI* CFI*, GEF* * Parameters are not available in the USA 73 If ScVO2 >75% PDRICG* - Liver ScvO2 - Indicates insufficient tissue oxygenation ScvO2 – Central venous oxygen saturation • Imbalance between O2 delivery and O2 consumption? • Measurement via standard CVC • ScvO2 (via CVC) correlates with SvO2 (via Pulmonary Artery Catheter) O2 Delivery O2 Consumption • CO • Hemoglobin • Arterial O2 saturation • Fever • Stress • Muscle work (shivering) ScvO2 74 ScvO2 SvO2 70-80% 65-75% Cardiac Output – Blood volume, amount of blood pumped by the heart per minute CI – Cardiac Index (Thermodilution) PCCI – Pulse Contour Cardiac Index (Cont. Pulse Contour) SVI – Stroke Volume Index • • • • Cardiac Index indicates the global blood flow Cardiac Index is Heart Rate x Stroke Volume Index Stroke Volume depends on preload, afterload and contractility Cardiac Index is indexed to the Body Surface Area (BSA) CO Stroke volume Preload Heart rate Afterload Contractility 75 PCCI SVI 3-5 l/min/m2 40-60 ml/m2 Preload Volume – Blood volume which fills the heart just prior to beating GEDI – Global End-diastolic Volume Index • Filling volume of all 4 heart chambers • Adequate preload volume is necessary for an adequate CO • GEDI is indexed to the PBSA* • Volumetric preload assessment * Predicted Body Surface Area (normalized body surface area) 76 GEDI 680-800 ml/m2 Direct correlation between GEDI and CO CI (l/min/m2) 7.5 Frank-Starling-Curve 5.0 Inotropes 2.5 Preload increase 200 400 600 800 1000 1200 1400 GEDI (ml/m2) • Preload optimization (GEDI) will increase Cardiac Index (CI) to a defined maximum (top of the Frank-Starling-Curve) • After preload optimization CI can be increased further by inotropes 77 Volume responsiveness – predicts the response of cardiac output to volume loading SVV – Stroke Volume Variation PPV – Pulse Pressure Variation Stroke volume (SV) Respiratory fluctuations in the arterial pressure curve in fully controlled ventilated patients. • High SVV/PPV (>10%) indicates the stroke volume will increase following preload volume loading • At values >10% volume replacement can be useful SVV > 10% PPV > 10% SVV 0-10% PPV 0-10% Preload (GEDI) 78 SVV PPV < 10% < 10% SVV / PPV – Safety Tips SVV / PPV – can only be used as a volume responsive parameter under controlled conditions. Is the patient on fully controlled ventilation? Spontaneous breathing or assisted breathing may cause incorrect measurements. Is the patient in sinus rhythm? The arterial pressure curve cannot be used in arrhythmic patients. Is the arterial pressure curve free from artifacts? Artifacts such as coughing or dys-synchronisation with the ventilator. Sufficiently high tidal volume? In cases of low tidal volume, the effect of ventilation on the arterial pressure curve is inadequate. (usable with a tidal volume >= 8ml/KG* PBW). * Muller et al. The influence of the airway driving pressure on pulsed pressure variation as a predictor of fluid responsiveness . ICM 2010; 36: 496-503 De Backer et al. Pulse pressure variations to predict fluid responsiveness: influence of tidal volume. ICM 2005; 31:517–523 79 Lung water– water content of the lungs ELWI – Extravascular Lung Water Index • Measurement of the intracellular, interstitial and intra-alveolar water content of the lungs (not pleural effusion) • Direct and easy bedside quantification and tracking of pulmonary edema ELWI = 19 ml/kg ELWI = 7 ml/kg ELWI = 14 ml/kg ELWI = 8 ml/kg 80 ELWI 3-7 ml/kgPBW Predicted Body Weight (PBW) • Absolute values (cardiac output, GEDV, EVLW) are indexed to the body surface area (BSA) and body weight (BW indexed) to make values comparable between patients. • The size of the heart and lungs are proportional to ‘ideal’ BSA and ‘ideal’ weight, but not to actual BSA and weight KG • GEDV and EVLW are indexed to ‘ideal’ BSA (PBSA) and ‘ideal’ weight (PBW). In order to avoid an underestimation of values in obese patients • Cardiac output is indexed to the current BSA in order to ensure comparability to other systems. 81 5 CI Hydrostatic volume shift 3 1. If preload is low, volume is given. 2. Preload loading can increase CI to its maximum. 3. Excessive preload loading will also increase the hydrostatic pressure in the vascular system. This can lead to an increase in lung water. ELWI GEDI 7 3 680 800 GEDI 82 Hydrostatic vs. osmotic edema Infusion Hydrostatic Edema Osmotic Edema Intravascular Extravascular Normal tissue permeability Disturbed tissue permeability Osmotically active particle (protein & salt) H2O 83 Differentiate between types of pulmonary edema PVPI* – Pulmonary Vascular Permeability Index • Provides a differentiated view of pulmonary edema: • cardiac • osmotic • Corresponds to the ratio between lung water (EVLW) and pulmonary blood volume (PBV) * Parameter is not available in the USA Normal situation PVPI 1-3 EVLW PBV 1 1 PVPI =1 3 3 PVPI =1 Cardiac lung edema PVPI 1-3 EVLW PBV Osmotic lung edema PVPI 3-5 Extravascular fluid / EVLW Intravascular fluid / PBV EVLW PBV 4 1 84 PVPI =4 PVPI* 1-3 Afterload – Resistance against which the heart must overcome to eject blood SVRI - Systemic Vascular Resistance Index • Measurement of the resistance against which the heart must pump • Depends on the degree of vasoconstriction • Increased: Centralization, Vasopressor therapy, Cardiogenic shock • Decreased: Septic shock, Anaphylactic shock . Resistance = Vasoconstriction: Flow (CO) Pressure (RR) Pressure Flow (CO) Vasodilation: Flow (CO) Pressure (RR) 85 SVRI 1700-2400 dyn/sec/m2 Contractility - Performance of the heart muscle GEF* – Global Ejection Fraction • Ratio of ejection to ventricular filling • Measures global cardiac contractility • GEF correlates well with LVEF (Echocardiography) * Parameter is not available in the USA GEF* = 86 4 x SV GEDV GEF* 25 - 35 % LVEF 50 – 70 % Contractility - Performance of the heart muscle CFI* – Cardiac Function Index • Index of the relationship between flow and cardiac preload • Measures global cardiac performance * Parameter is not available in the USA CI 5 4,9 7 4 3,5 1,5 High contractility 9 Normal contractility 5 6 CFI* = 2 2 Low contractility CO GEDV 3 400ml 700ml 900ml GEDI 87 CFI* 4,5 – 6,5 Contractility - Performance of the heart muscle dPmx – Left Ventricular (LV) contractility • Measures the contractility of the left ventricle to afterload • Maximum pressure increase over time in the aorta (∆Pmax / ∆t) • Trending parameter, no normal range • NB: Preload and afterload both influence dPmx Steep pressure increase High LV Contractility Flatter pressure increase Low LV Contractility dPmx 900-1200 for a healthy heart 88 Contractility - Performance of the heart muscle CPI* – Cardiac Power Index • CPI is the left ventricular cardiac output (W) as a product of flow and pressure • The strongest independent predictor of hospital mortality in cardiogenic shock * Parameter is not available in the USA Power = Watt 1 Watt = 1 Joule/Second Power (Watt) = Current (V) x Amps (A) (x conversion factor) CPI* = MAP x CI (x 0.0022) 89 CPI* 0.5 – 0.7 W/m² The relationship between DO2 and VO2 Delivery: DO2I = CI x Hb x 1.34 x SaO2 SaO2 CO, Hb Oxygen uptake Oxygen transport Oxygen release Oxygen consumption S(c)vO2 Consumption: VO2I = CIxHbx1.34x(SaO2 – S(c)vO2) O2 supply VO2 ml/min/m² Enough - DO2 and VO2 indicate the relationship between O2 supply and O2 consumption - If DO2 falls below a critical point, tissue hypoxia will occur O2 transport capacity DO2 ml/min/m² 90 DO2I 400-650 ml/min/m2 VO2I 125-175 ml/min/m2 Liver perfusion / Splanchnic perfusion PDRICG*– Plasma Disappearance Rate of Indocyanine Green (ICG) • Shows the excretion of ICG dye from the blood by the liver • Is a marker of global liver function and perfusion • The value is decreased if: • the liver cell function is impaired. • the liver has insufficient perfusion. • Highly prognostic regarding mortality * Parameter is not available in the USA Hepatocyte Distribution in blood Transport to the liver Liver ICG Injection Gall bladder Colon Excretion by the liver 91 PDRICG*18 - 25 %/min Therapy control 93 Doctor & Nurse Communication Planning Phase Doctor: Examination and diagnosis Doctor: Treatment Decisions Implementation Phase Do Plan Evaluation Phase Doctor: Follow up or redefinition of treatment Nurse: Execution of the treatment plan Control Phase Act Check Nurse: Monitoring ongoing situation 94 94 I. Summary Thank you for your attention! Contact: PULSION Medical Systems AG Joseph-Wild-Str. 20 81829 Munich Germany Tel: +49 (0) 89 45 99 14 – 0 Fax: +49 (0) 89 45 99 14 – 18 info@pulsion.com www.PULSION.com 95 96 Auto Thermodilution mode In the configuration screen the Auto thermodilution function can be activated Option to select 3 – 5 measurements in a row, without having to press the start button each time 97 Selection of oxygen parameters • Visualization of DO2 and VO2 in real-time to monitor oxygen delivery and oxygen consumption (CI and ScvO2 must be monitored continuously) *Physically dissolved oxygen is ignored. Oxygenation 98 Patient admission Admission from a general ward: 5 days post-operative after a colon resection, no CVC, no A-line Vital signs • GCS: • Respiration: • Pulse: • NIBP • Temperature somnolent tachypnea 120 90/50 39.8°C 99 Patient admission ECG • Monitor heart rhythm SR • Monitor heart rate 120/min SpO2 > O2 mask with 5l/min • Awareness of respiratory failure 95% • Monitor O2-supply and respiration > Intubation 100 Basic Monitoring Electrocardiogram (ECG) NIBP (RR) Pulse oximetry (SpO2) • Can we identify the source of the shock? • Can we control the patients circulation with this level of monitoring? 101 Standard Monitoring Invasive blood pressure monitoring • • • • A. Axilla A. Brachial A. Radial A. Femoral Differentiation • Central perfusion (Femoral, Brachial and Axilla) • Peripheral perfusion (Radial) 102 Compensation mechanism 10:30 RR is decreasing! AP CI MAP 65mmHg MAP 55mmHg CI 3L/min CI 2L/min 10:00 10:30 10:22 Flow decreasing! • The blood pressure gives only a delayed picture when a circulatory problem is occurring. • Continuous CI responds to problems much earlier. • Conventional parameters for monitoring circulation (RR + HR) may be meaningless or even misleading 103 Physiological model of the circulatory system Pump 104