Mech vent final rev. Word Scramble

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Mech vent final rev.

Shanti's class @ ATI

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

Created by: celina1382 on 2009-04-22