2brt mechanical vent info. egans 42
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| vents can mesure what? | presure, vol., flow or time
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| conditional variable is used for what? | used by vent control circuit to make decisions.
Ex: if value of a cond. variable reaches preset level, than some action occurs to change vent pattern.
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| how is acute cardiogenic pulmonary edema managed if hypercarbia is present? | NPPV non invasive positive presure ventilation
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| What is NPPV used for in hypoxemic resp. failure? | it is used if pt with poor outcome from intubation
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| when do intubate a pt with ALI/ARDS? | if no improvement within 1 to 2 hours
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| how do you manage acute cardiogenic pulmonary edema? | CPAP of 8 to 12 cm H2O with 100% O2
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| What are the weaning modes | CPAP, SIMV, IMV, SMV
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| What control do you use with head injury? | volume control
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| peep is used for what? | presure at elvated level at expiration
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| what will peep help with? | increased PaO2, increased FRC, improves o2
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| motion equation | p=(elastance x vol) + resistance x flow)
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| ventilation cycle of breath | initiation of inspiration, inspiration its self, end of inspiration, expiration
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| what are the diffrent ramps? | ascending above base and decending below base
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| trigger variable | causing breath to begin
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| a vent has a preset presure early in inspiration and holds it for spacific time for which inspiration ends. What cycle is it? | time cycle
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| tidal vol is a function of a set ______ and set_________ | inspiratory flow and inspiratory time
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| vol. cycle vent, it provides gas under positive presure during inspiration till what point? | tidal vol needed reaches a preset volume
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| Breath initiated by the vent | mandatory breath
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| when would I us vol control ventilation | RENT
Retention (CO2), Even distrubution needed, Neuro patient, Trauma to head
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| combination of machanical and spontanious breaths | intermittent mandatory breaths
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| 3 variables that vents control | vol flow and pressure (remember that vol and flow they allways go because of the pressure)
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| how to figure minute ventilation | vt x rr
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| which varible maintains preset level before inspiration begins? | cycle varible
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| What is preset rate | rate set to acomplish desired tidal vol
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| 2 primary drive mechanismes | Electric and Pneumatic
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| sensitivity | presure drop to initiate patients breath. higher more effort, lower less effort
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| when do we use presure control ventilation | Pt. isn't maintaining oxygnation on own, ARDS, Restrictive diseases, refractory high poximia
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| setting range for presure trigger | .5 to 1.5 cmH2O
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| setting range for flow trigger | 1 to 3 L/min
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| vent device does not directly control the delivered vol. | flow control
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| during volume targeted ventilation what determins total cycle time? | rate
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| what variables will help determine expiratory time? | flow volume rate
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| what paramiter serves as baseline of all ventilators? | presure
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| what baseline variable is used on all modern ventilators? | PEEP
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| What are the variables a vent can control? | flow volume presure
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| ventilator used to transport? | punmatic battery fluid logic
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| with neuro muscular disorder which setting do I use? | volume control
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| cause a breath to end? | cycle variable
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| highest peak insparatory presure | ascending wave
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| flow control variable constant? varies? | flow and volume constant, presure varies
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| what control is used for restrictive disease? | presure control (is restrictive so we need presure to get O2 into lungs)
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