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Mech Vent Units 3&4
SPC Mechanical Vent Units 3 & 4
| Question | Answer |
|---|---|
| What are the indications for artificial airways? | Suction, Airway/Aspiration, Ventilation, Obstruction |
| What types of pts are NIFS & VCs commonly done on? | SOB, muscular disease |
| What are Cheyne Stokes respirations? | Vt gradually increases & decreases followed by brief apneic period. |
| What are Biot's respirations? | Respiratory rate changes but Vt stays the same |
| What are the methods of triggering inspiration? | Pressure, Flow, Time |
| Things that increase a pt's drive to breathe? | Airway resistance, chest wall deformities, ARDS |
| Things that decrease a pt's drive to breathe? | Depressant drugs, brainstem lesions, hypothyroidism |
| What is positive pressure ventilation? | Pressure at mouth is above ambient pressure causing air to rush into lungs - pushing air into lungs via the mouth. |
| What are the types of a breath? | Mandatory, Assisted, & Spontaneous |
| What are the variable modes of ventilation? | Volume, Pressure, Flow, Time |
| What is the factor that begins inspiration? | Triggering |
| What is the factor that ends inspiration & begins exhalation? | Cycling |
| Define respiratory failure | pH < 7.25 and PaCO2 > 50 |
| What is the normal A-a gradient range? | 5-15 mmHg |
| What are the main waveforms monitored in mech. vent.? | Pressure, Volume, Flow |
| What is compliance? | Stretchability of lung tissue & thoracic wall |
| What are 2 goals of mechanical ventilation? | Decrease WOB, restore normal acid-base balance |
| What is the normal Vd/Vt range? | 0.20 - 0.40 |
| What is mandatory breath? | Vent is doing all the work of breathing |
| What is assisted breath? | Pt begins breath, vent controls inspiratory phase & ends expiration. |
| What is spontaneous breath? | Pt controls all phases of breathing |
| What is the normal range for airway resistance? | 1-2 cmH2O/L/sec(not tubed), 5-7 cmH2O/L/sec(tubed) |
| The formula used to derive Vd? | PaCO2 - PeCO2 / PaCO2 |
| What is the #1 deadspace disease? | Pulmonary Embolus |
| What is the normal & critical range for pH? | Normal: 7.35-7.45, Critical: <7.25 |
| What is the normal & critical range for PaCO2? | Normal: 35-45, Critical: >50 |
| What is the normal & critical range for Vd/Vt? | Normal: .2 -.4, Critical: >.6 |
| What is the normal & critical range for PaO2? | Normal: 80 - 100, Critical: <70(on O2) |
| What is the normal & critical range for P(A-a)O2? | Normal: 5 - 15, Critical: >450(on O2) |
| What is the normal & critical range for a/A O2? | Normal: 0.75 - 0.95, Critical: <0.15 |
| What is the normal & critical range for PaO2/FiO2? | Normal: 475, Critical: <200 |
| What is the normal & critical range for MIP/NIF cmH2O? | Normal: -50 to -100, Critical: 0 to -20 |
| What is the normal & critical range for MEP cmH2O? | Normal: +100, Critical: <40 |
| What is the normal & critical range for VC (ml/kg)? | Normal: 65 to 75, Critical: <15 |
| What is the normal & critical range for Vt (ml/kg)? | Normal: 5 to 8, Critical: <5 |
| What is the normal & critical range for RR/Frequency? | Normal: 12-20bpm, Critical: >35bpm |
| What is the normal & critical range for FEV1 (ml/kg)? | Normal: 50 to 60, Critical: <10 |
| What is the normal range for Peak flow (L/sec)? | Normal: 100 to 850 L/min |
Created by:
vgflgirl
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