Home Forums MCQ 20b 12: Safety & Quality in Anaesthesia TRUE | FALSE Statements

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    BT_SQ 1.3
    A fresh gas outlet must have a standard 22mm, 15mm or 8.5mm connector compliant with ISO 5356. TRUE/FALSE 
An anaesthetic machine must contain an integral high pressure relief valve to prevent high pressures in the breathing system TRUE/FALSE 
The scavenging connector to the circuit must be a 22mm tapered conical fitting compliant with ISO 5356 TRUE/FALSE 
An anaesthetic machine which requires electrical power must have a backup power supply which permits normal operation for at least 20 mins TRUE/FALSE 
The emergency oxygen flush must have a locking feature to facilitate use in airway emergencies TRUE/FALSE
    The oxygen failure alarm shall activate at pressures of less than 410 kPa. TRUE/FALSE
    The anaesthetic machine must contain an automatically activated reserve oxygen supply. TRUE/FALSE
    The oxygen supply failure alarm must be user cancellable. TRUE/FALSE
    The oxygen supply failure alarm must shut off the supply of all other gases in the event of oxygen failure. TRUE/FALSE
    The oxygen supply failure alarm must shut off the supply of all other gases in the event of oxygen failure. TRUE/FALSE
    If the anaesthetic machine incorporates a gas flowmeter bank, oxygen must be the first gas to enter the common gas manifold at the top of the flowmeter tubes. TRUE/FALSE

    BT_SQ 1.5
    Laryngoscope blades should be sterilised after use TRUE/FALSE
    Single use items may be sterilised if the process complies with AS/NZS 4187 TRUE/FALSE
    Disinfection involves the inactivation of non-sporing organisms and spores. TRUE/FALSE
    Bougies should be disinfected after use. TRUE/FALSE
    The surface of the anaesthetic machine should be disinfected between patients TRUE/FALSE

    BT_PO 1.38
    At a relative humidity of 100%, a litre of gas at 21 degrees Celcius will contain the same amount of water as a litre of gas at 37 degrees Celcius TRUE/FALSE
    In an awake person, during quiet nasal breathing, humidification of inhaled air occurs in the upper airway TRUE/FALSE
    Airway lining fluid acts as heat and moisture exchanger during respiration TRUE/FALSE
    Relative humidity levels need to be monitored and controlled in the operating theatre TRUE/FALSE
    Administration of dry gases may impair surfactant activity TRUE/FALSE

    Turbulent flow in the upper airway is better than laminar flow for humidification TRUE/FALSE
    High minute volumes will move the isothermic saturation boundary distally TRUE/FALSE
    With an unchanged absolute humidity, relative humidity will decrease as temperature increases  TRUE/FALSE
    Gas in an oxygen cylinder has a relative humidity of 50%  TRUE/FALSE
    Physiological humidification of inhaled gas requires more energy than warming it  TRUE/FALSE

    BT_RA 1.8
    The frequency and amplitude of a wave are synonymous terms TRUE/FALSE
    One Hertz = 100 cycles per second TRUE/FALSE
    Ultrasound consists of high frequency sound waves above the human hearing range (medical ultrasound is 2.5 – 15 MHz) TRUE/FALSE
    Ultrasound waves are produced by a piezo-electric crystal. The crystal vibrates in response to an electric current. TRUE/FALSE
    Choosing an ultrasound transducer with a higher frequency will produce a higher resolution image, at a greater depth TRUE/FALSE
    Ultrasound waves are propagated through all tissues at the same velocity TRUE/FALSE
    When using ultrasound for an invasive procedure, the probe must be covered by a sterile cover, and sterile gel must be used (see ANZCA PS 28) TRUE/FALSE

    BT_RA 1.9
    A short stimulation pulse is an advantage in a nerve stimulator for nerve localisation for neural blockade TRUE/FALSE
    A nerve stimulator for nerve localisation should have a constant voltage output TRUE/FALSE
    When performing a nerve block with a nerve stimulator, the needle should be connected to the positive electrode TRUE/FALSE
    When performing a nerve block with a nerve stimulator, injection of 5% dextrose increases current density at the tip of the needle TRUE/FALSE
    Nerve stimulators can be used to locate nerves with no motor innervation TRUE/FALSE

    BT_SQ 1.6
    Damping is a reduction in the amplitude of an oscillation as a result of energy being drained from the system to overcome frictional or other resistive forces. TRUE/FALSE
    The natural resonant frequency of a system is proportional to the stiffness or tension in the system, and inversely proportional to the mass. TRUE/FALSE
    As in tightening a violin or guitar string, increasing the stiffness or tension will lead to an increase in the natural resonant frequency (a higher note on the instrument) TRUE/FALSE

    An operating room paramagnetic analyser incorporates a pressure transducer TRUE/FALSE
    Pressure exerted on the side of a tube decreases as flow rate increases TRUE/FALSE
    Nitric oxide at clinically used concentrations will falsely increase oxygen concentration in a paramagnetic analyser used in theatre TRUE/FALSE
    Paramagnetic analysis degrades oxygen molecules into free radicals so the gas cannot be returned to the circuit TRUE/FALSE
    Oxygen tension can also be measured with infrared analysis TRUE/FALSE
    Operating room paramagnetic analysers use 100% oxygen as the reference gas TRUE/FALSE
    Gas sampled from the patient wye will allow measurement of both inspired and exhaled gas tension TRUE/FALSE
    A fuel cell is a battery TRUE/FALSE
    A fuel cell requires temperature compensation TRUE/FALSE
    A fuel cell lifespan can be increased by exposing it to air instead of oxygen at the end of the list TRUE/FALSE
    The 90-95% response time for a CO2 analyser should be less than 150ms TRUE/FALSE  
Volatile agents can be distinguished from each other by measuring infrared absorbance at 3.3µm TRUE/FALSE  
Collision broadening means that the absorption peak for CO2 at 4.3µm is made wider in the presence of Nitrous Oxide TRUE/FALSE  
Infrared analysers measure gas concentration rather than partial pressure TRUE/FALSE  
Water is a powerful absorber of infrared light TRUE/FALSE

    A pulse oximeter radiating 2 wavelengths of light can only differentiate 2 different forms of Hb. TRUE/FALSE
    Oxygenated haemoglobin absorbs light at a wavelength of 660nm. TRUE/FALSE
    The y axis on the plethysmograph is an estimate of arterial calibre and thus sympathetic tone. TRUE/FALSE
    Methaemoglobin is strongly absorbed at 660 and 940nm TRUE/FALSE
    An adult pulse oximeter cannot accurately read oxygen saturations when foetal haemoglobin is present. TRUE/FALSE
    Response time is faster when the oximeter is on the earlobe cf the finger TRUE/FALSE
    Bilirubinaemia can result in a falsely low oxygen saturation with pulse oximetry TRUE/FALSE
    The percentage of the signal which is pulsatile in finger pulse oximetry is approximately 80% TRUE/FALSE
    Anaemia may cause under-reading of oxygen saturations with pulse oximetry TRUE/FALSE
    A pulse oximeter will detect a drop in oxygen tension from 600mmHg to 200mmHg TRUE/FALSE
    Pulsatile venous flow may cause an over estimation of SpO2 TRUE/FALSE
    The red:IR absorption modulation ratio (R) equals 1 at SpO2 85% TRUE/FALSE
    Intravenous injection of indocyanine green causes a transient reduction in SpO2 TRUE/FALSE
    The accuracy of SpO2 in humans has not been calibrated below 70% TRUE/FALSE
    Red nail polish is likely to cause inaccurate SpO2 readings TRUE/FALSE

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