Shanti's class @ ATI
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What are the advantages of negative pressure ventilator? | We breathe negative pressure
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| What are the disadvantages of negative pressure ventilator? | Limited effectiveness in volume produced, low cardiac output in hypovolemic patients, can facilitate upper airway obstruction
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| Define Transpulmonary Pressure (PL) | pressure difference between alveolus and pleural space. Prevents atelectasis.
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| A patient with this disease has his Transpulmonary pressure. | Congestive Heart Failure
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| Define Transairway Pressure (PTA) | pressure between mouth and the alveolus
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| A patient with this diseaswe has high transairway pressure | Asthma
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| Define Peak Pressure | highest pressure recorded or seen on manometer at end of inspiration.
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| Define plateau pressure | pressure at end of inspiration following a 0.5 to 1.0 second hold.
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| Define static compliance | determines stiffnes of the lung at full inspired ventilator breath
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| What is the normal lung compliance for an intubated male? | 40-50 ml/cmH2O
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| What is the normal lung compliance for an intubated female? | 35-45 ml/cmH2O
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| What is the normal lung compliance for a non-intubated person | 50-170 ml/cmH2O
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| Define time constant | The rate at which lungs are filled
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| Define Dynamic Compliance | determines overall stiffness of lungs to ventilation
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| Define Airway resistance | frictional forces associated with ventilation due to lung tissue viscosity, the anatomical structure of the conducting airways and adjacent tissues and organs.
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| Normal RAW for non-intubated person | .6-2.4L/sec
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| Normal RAW for intubated patient | 6 cmH2O/L/sec
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| Calculation for static compliance | Vt/Plt-PEEP
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| Calculation for dynamic compliance | Vt/PIP-PEEP
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| Calculation for Airway Resistance | [(PIP-PLT)/Insp flow]*60
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| Control Panel AKA | User interface
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| Control Circuit | Brain. Logical decision making unit of the vent. aka microprocessor
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| Control Variable | Variables remain constant with any change in lung mechanics
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| Conditional Variable | Variable changes with changes in lung mechanics
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| Phase Variable | 3 phases of breath: Trigger, Limit, & Cycle
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| What is trigger variable | Beginning of inspiration, can be patient or machine. machine>time. patient>pressure or flow
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| What is limit variable | Max value
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| What is cycle variable | End of Inspiration
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| Examples of electrically powered ventilator | Bear I & Mac I
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| Examples of pneumatically Powered ventilator | Bird Mark 14 & Monoghan
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| Examples of combined electrically/pneumatically ventilator | Evita Dragger, Servo, Servo 300, 840, Sechrist, star, Bear 1000, viasys
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