Week 3- Mechanical Ventilation Flashcards
What is the purpose of mechanical ventilation?
Maintain homeostasis between gas concentrations Oxygen and CO2.
Do all mechanical ventilation indications come from a pulmonary impairment?
No
What are (5) indications for mechanical ventilation?
- Airway protection (Preventive measure)
- Cardiac arrest (Life saving measure)
- Management of ICP (Creation of alkalosis ->vasoconstriction ->dec cerebral blood flow/dec ICP)
- Airway obstruction (Maintenance of patent airway)
- Surgery or trauma (General anesthesia)
Describe the mechanical ventilation vocabulary:
- FiO2
- Tidal Volume (TV)
- PEEP
- Flow
- Respiratory Rate
- FiO2: Fraction of inspired oxygen (%)
- Tidal Volume (TV): Normal amount of air ventilated at rest (mL)
- PEEP: Positive End Expiratory Pressure (cmH2O)
- Flow: L/min
- Respiratory Rate: breaths/min
What are the 2 types of mechanical ventilation?
- Invasive
- Non-invasive
With invasive mechanical ventilation, why would we use a nasotracheal tube instead of an endotracheal tube?
If someone has an obstruction in throat or swelling.
What is a tracheostomy?
Invasive mechanical ventilation where tube is inserted straight into trachea.
- What are 2 types of non-invasive mechanical ventilation?
- Often the last step before __________.
- BiPAP or CPAP
- intubation
What is the difference between BiPAP and CPAP?
BiPAP (Bi-Level Positive Airway Pressure)
- BiPAP blows higher pressure while you breathe in. BiPAP blows lower pressure while you breathe out.
- Used for patients who have trouble exhaling.
CPAP (Continuous Positive Airway Pressure)
-CPAP blows constant pressure while you breathe in and out.
Is BiPAP a contraindication to PT?
No. Need to know why, how much they are on, and are they medically stable on BiPAP.
Is CPAP a contraindication?
No
-With mechanical ventilation, there is a ______ at the end of the tube that helps to hold it in place.
What do we suspect if the patient is able to talk or audibe sounds are heard with a tube inserted?
- cuff
- cuff leak
-The average person can be orally ventilated for ____ weeks. Why?
2, respiratory infection risk rises and it is not temporary anyways.
- What is done if the patient is unable to be weaned from the ventilator after 2 weeks?
- What are some reasons a patient would go straight to a trachestomy?
- Tracheostomy
- Difficult intubation (severe morbid obesity), Airway blocked or obstructed (tumor, traumatic injury)
What is a Passy Muir valve?
Valve put on the end of the tracheostomy to make it easier to talk.
- Why do most rehab facilities not take people with tracheostomy?
- Where will most patients with a tracheostomy go?
- High level of care including cleaning tube, access to wall suction.
- Long term acute care
- What is a second discharge option other than long term acute care?
- What are the requirements for them to be admitted here?
- rehab facility
- if they can be put on a trach collar and the percentage of O2 is 28% or less.
MODES OF VENTILATION
MODES OF VENTILATION
What are the main (7) modes of ventilation seen?
-Volume Control (VC)
-Pressure Control (PC)
-Assist Control (AC)
-Pressure Regulated Volume Control (PRVC)
-Synchronous Intermittent Mandatory Ventilation
(SIMV)
-Pressure Support Ventilation
-Volume Support (VS)
-Continuous Positive Airway Pressure (CPAP)
Volume Control (VC):
- Preset _____ volume is delivered at a set ________ rate
- Used when patient has no __________ breathing
- Peak pressures can vary depending on patient’s lung __________ and ___________
- tidal, respiratory rate
- spontaneous
- compliance and resistance
With volume control, pressure from ventilator will ________ if patient’s lung compliance decreases.
increase (stiff lung = increased resistance)
Pressure Control (PC):
- Predetermined amount of _________ at a set rate
- Ventilator determines __________ time
- Patient has no __________ breathing
- ______ used to increase arterial oxygen, improve lung compliance (prevents collapse, makes lungs easier to inflate)
- pressure
- inspiratory
- spontaneous
- PEEP
Assist Control (AC):
- Delivers a specific amount of ______ volume
- Forces air down into lungs
- ________ or ventilator can trigger when breaths are taken
- _____ level of respiratory support
- tidal
- patient
- high
Pressure Regulated Volume Control (PRVC):
- Combines _______ and ______ controlled ventilation
- Preset tidal volume is delivered at set rate, but with ______ possible pressure
- Helps prevent __________
- pressure and volume
- lowest
- barotrauma
