Cardiac Output Measurement
Cardiac output; Adolf Eugen Fick (1829-1901) in 1870, was the first to measure cardiac output; assumes oxygen consumption is a function of rate of blood flow and rate of oxygen pick pick up by RBC’s.
Capnography and CO2 Detectors
Capnography and CO2 Detectors: help confirm endotracheal intubation; monitor ventilation during procedural sedation (e.g. via Hudson mask) without mechanical ventilation; monitoring during mechanical ventilation
Capnography Waveform Interpretation
Capnography waveform interpretation can be used for diagnosis and ventilator-trouble shooting. The CO2 waveform can be analyzed for 5 characteristics:–Height–Frequency–Rhythm–Baseline–Shape
Bag-Valve-Mask (BVM) Ventilation
Bag-Valve-Mask (BVM) apparatus are also known as manual resuscitators and as self-inflating resuscitation systems
AHA/ACC Guidelines (2007)
AHA/ACC Guidelines (2007) – Perioperative Cardiovascular Evaluation of the Patient undergoing Non-cardiac Surgery Take Home Message = if assessment and evaluation not indicated irrespective of perioperative context then just crack on (its all about symptoms). 3 factors involved in risk…
Bubble CPAP
USES neonatal respiratory failure (surfactant deficiency) asthma bronchiolitis DESCRIPTION METHOD OF INSERTION 3 basic parts: (1) supply humidified and heated air(2) nasal cannula or face mask(3) positive pressure provided by depth of immersion of the expiratory air flow in water…
Blood Warmer
Blood Warmer: Used with rapid transfusion rates (e.g. >50 mL/kg/hr), in already hypothermic patients or rare conditions where cold fluid delivery is problematic (e.g. cold agglutinins); massive transfusion (avoid hypothermia)
Blood gas syringe
Blood gas syringe: used for blood gas analysis; collection of a blood sample for accurate analysis by a blood gas machine
Arterial line and Pressure Transducer
Arterial line and Pressure Transducer
Blood filter
Blood filter: removal of microaggregates during blood transfusion; platelet, leucocyte and fibrin aggregates form in stored blood and are thought to produce pulmonary microembolism -> pulmonary dysfunction
Emergent Valve Disorders
Emergent Valve Disorders: regurgitation most common; acute or acute on chronic valve dysfunction; acute on chronic often precipitated by increase in metabolic or haemodynamic requirements (sepsis, bleeding, pregnancy).
Aortic Regurgitation
Aortic regurgitation is diastolic reflux of blood from aorta to LV due to malposition of the aortic cusps. RISK FACTORS age enlarged aortic root diameter: Marfans, Enhlers-Danlos, oesteogenesis imperfecta, connective tissue disorders bicuspid AV atherosclerosis infective endocarditis rheumatic heart disease…