Respiratory Flashcards
Tidal Volume
6-8 mL/kg
Average Tidal volume (Vt)
500mL
Average inspiratory reserve volume (IRV)
3000mL
Average Expiratory reserve volume (ERV)
1200mL
Average Residual volume (RV)
1300mL
Average Inspiratory capacity (IC)
3500mL
Average Functional residual capacity (FRC)
2500mL
Average Vital capacity (VC)
4700mL
Average Total lung capacity (TLC)
6000mL
pH
7.35-7.45
CO2
35-45
HCO3
22-26
PaO2
80-100
Room air FiO2
21%
Nasal cannula FiO2
24-45%
NRB FiO2
60-80%
How much does each L of O2 add to room air
3-4% mainly 4%
Respiratory failure definition
PaO2 <60 (50) with FiO2 >50 PaCO2 >50 with pH <7.25 50/50 rule Respirations less than 10 GCS less than 8
Vent: AC
Assist patient with all breaths, initiated or not
Vent: SIMV
Only assists with mandatory breaths
Vent: Pressure ventilation
CPAP, BiPAP, Pressure support- (Vent helps when you take a breath but turns off during exhale)
PEEP
Positive end expiratory pressure
Keeps lungs/alveoli open
Increased PEEP causes
Decreased CO and BP
Increased ICP
Barotrauma
Tension pneumo
Ventilation Perfusion Mismatch
V/Q: 1
(ventilation < perfusion) <1: Atelectasis, tumor, mucus plug, pneumonia, pulmonary edema
(perfusion < ventilation) >1: PE, pulmonary edema, infarction ,cardiogenic shock
ARDS
Acute onset within one week of clinical insult
Diffuse, bilateral pulmonary opacities not explained by other conditions
Peak inspiratory pressure
<40
PEEp for normal lung
5