A-a gradiatian calculation is a calculation of what? - level of hypoxia
PA02-Pa02
A-a gradiant varies with age, calculation - 2.5 + 0.21 x age in years
5 causes of hypoxemia - VQ mismatch
shunt
PNA, interstitial lung dz
hypoventilation
high altitude
clinical symptoms that require intubation - neuromuscular depression or failure.
, spinal cord injuries
guillain barre syndrome
trauma-spinal cord injuries, phrenic nerve injury
myasthenia gravis
shock
status asthmaticus
sustained apnea of any kind
indications for weaning from vent - underlying process that required the vent is corrected
maintaining oxygen status
no presser support- levophed, epinephrine, etc.
Pa02 >80, FI02 of 0.5, and PEEP <8.0 cm H20
prior to seperation from the vent proceed with this ...... to determine if pt is able to dc vent - trial of
spontaneous breathing
Volume targeted assist control (AC) mode - the clinician determines tidal volume and rate/ pt can still
breath over the vent. example: pt gets RR of 12 but has an additional 2 breaths on their own, pt will still
breathe 14 breaths/min. tidal volume is based on the vent.
Synchronized intermittent mandatory ventilation SIMV - clinician sets rate, and tidal volume, and peak
inflation pt can also have their own breaths. tidal volume is set based on the patient. VENT doesn't
specify tidal volume.
Pressure Control - A mode of ventilation that is normally patient or time triggered, pressure targeted and
time cycled.
AC control vent settings how do you determine tidal volume? - is based on ideal body weight. careful
with obese patients.
tidal volume - Amount of air that moves in and out of the lungs during a normal breath
peep - positive end expiratory pressure
Static Pressure - the pressure of air at rest, or that portion in moving air, if the air stream were to stop
Plateau pressure - Measures the compliance the entire lung
End inspiratory pause button
Peak pressure - Pressure required to get a volume of air into the lungs, fighting resistance
increase in peak pressure is a complication from which patients? - ARDS or restrictive airway patients.
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