CHAPTER 53 - AIRWAY MANAGEMENT Flashcards
CHAPTER 53
Airway Management
Managing airway compromise
includes respiratory assessment and measuring vital signs, including oxygen saturation via pulse oximetry and administration of oxygen.
Oxygen helps maintain adequate
cellular oxygenation for clients who have many acute and chronic respiratory problems (bronchitis, cystic fibrosis, asthma) or are at risk for developing hypoxia (respiratory illness, circulatory impairment).
Maintaining a patent airway is a nursing priority. It involves
mobilizing secretions, suctioning the airway, and managing artificial airways (endotracheal tubes, tracheostomy tubes) to promote adequate gas exchange and lung expansion.
● A pulse oximeter is a device
with a sensor probe that attaches securely to the fingertip, toe, bridge of nose, earlobe, or forehead with a clip or band.
● A pulse oximeter measures pulse saturation (SpO2) via a wave of
infrared light that measures light absorption by oxygenated and deoxygenated hemoglobin in arterial blood. SpO2 reliably reflects the percent of saturation of hemoglobin (SaO2) when the SaO2 is greater than 70%.
● Oxygen is a tasteless and colorless gas that accounts fo
r 21% of atmospheric air.
● Oxygen flow rates vary to maintain an SpO2 of
95% to 100% using the lowest amount of oxygen to achieve the goal without risking complications.
● The fraction of inspired oxygen (FiO2) i
s the percentage of oxygen the client receives.
Noninvasive measurement of the oxygen saturation of the blood for monitoring respiratory status when assessment findings include any of the following.
● Increased work of breathing
● Wheezing
● Coughing
● Cyanosis
● Changes in respiratory rate or rhythm
● Adventitious breath sounds
● Restlessness, irritability, confusion
● Dyspnea
● Orthopnea
● The expected reference range is 95% to 100%. Acceptable levels range from
91% to 100%. Some illness states can allow for 85% to 89%.
Readings less than 90% reflect
hypoxemia.
● Values can be slightly lower for
older adult clients and clients who have dark skin.
● Additional reasons for low readings include
hypothermia, poor peripheral blood flow, too much light (sun, infrared lamps), low hemoglobin levels, jaundice, movement, edema, metal studs in nails, and nail polish.
Oxygen is a therapeutic gas that
treats hypoxemia (low levels of arterial oxygen).
Administering and adjusting it requires
a prescription.
MANIFESTATIONS OF HYPOXIA - early on
EARLY
● Tachypnea
● Tachycardia
● Restlessness, anxiety, confusion
● Pale skin, mucous membranes
● Elevated blood pressure
● Use of accessory muscles, nasal flaring, adventitious lung sounds
MANIFESTATIONS OF HYPOXIA - later on
LATE
● Stupor
● Cyanotic skin, mucous membranes
● Bradypnea
● Bradycardia
● Hypotension
● Cardiac dysrhythmias
NURSING ACTIONS for hypoxia
● Monitor respiratory rate and pattern, level of consciousness, SpO2, and arterial blood gases (ABGs).
● Provide oxygen therapy at the lowest liter flow that will correct hypoxia.
● Make sure the mask creates a secure seal over the nose and mouth.
● Assess/monitor hypoxia and hypercarbia (elevated levels of CO2): restlessness, hypertension, and headache.
● Auscultate the lungs for breath sounds and adventitious sounds (crackles and wheezes).
● Assess/monitor oxygenation status with pulse oximetry and ABGs.
● Promote oral hygiene.
● Encourage turning, coughing, deep breathing, and the use of incentive spirometry and suctioning.
● Promote rest and decrease environmental stimuli.
● Provide emotional support.
● Assess nutritional status. Provide supplements.
● Assess skin integrity. Provide moisture and pressure‑relief devices.
● Assess and document the response to oxygen therapy.
● Titrate oxygen to maintain the recommended oxygen saturation.
● Discontinue supplemental oxygen gradually.
● Monitor for respiratory depression (decreased respiratory rate and level of consciousness).
● Low‑flow oxygen delivery systems deliver varying amounts of oxygen based on the delivery method and the client’s breathing pattern.
LOW‑FLOW OXYGEN DELIVERY SYSTEMS
Nasal cannula / simple face mask / Partial rebreather mask / Non-rebreather mask
Nasal cannula
Tubing with two small prongs for insertion into the nares
FRACTION OF INSPIRED OXYGEN
FRACTION OF INSPIRED OXYGEN: Delivers an FiO2 of 24% to 44% at a flow rate of 1 to 6 L/min.
ADVANTAGES nasal canula
● A cannula is a safe, simple, and easy‑to‑apply method.
● A cannula is comfortable and well‑tolerated.
● The client is able to eat, talk, and ambulate.
DISADVANTAGES nasal canula
● The FiO2 varies with the flow rate, and the rate and depth of the client’s breathing.
● Extended use can lead to skin breakdown and dry mucous membranes.
● Tubing is easily dislodged.
NURSING ACTIONS - nasal canula
● Assess the patency of the nares.
● Ensure that the prongs fit in the nares properly.
● Use water‑soluble gel to prevent dry nares.
● Provide humidification for flow rates of 4 L/min and greater.
Simple face mask
Covers the client’s nose and mouth
FRACTION OF INSPIRED OXYGEN
● It delivers an FiO2 of 35% to 50% at flow rates of 6 to 12 L/min.
● The minimum flow rate is 6 L/min to ensure flushing of CO2 from the mask.
ADVANTAGES - simple face mask
● A face mask is easy to apply and can be more comfortable than a nasal cannula.
● It is a simple delivery method.
● It is more comfortable than a nasal cannula.
● It provides humidified oxygen.
DISADVANTAGES - simple face mask
● Flow rates less than 6 L/min can result in rebreathing of CO2.
● Clients who have anxiety or claustrophobia do not tolerate it well.
● Eating, drinking, and talking are impaired.
● Moisture and pressure can collect under the mask and cause skin breakdown.
● Face masks pose a greater risk of aspiration.
NURSING ACTIONS simple face mask
● Assess proper fit to ensure a secure seal over the nose and mouth.
● Make sure the client wears a nasal cannula during meals.
● Use with caution for clients who have a high risk of aspiration or airway obstruction.
● Monitor for skin breakdown.
Partial rebreather mask
Covers the client’s nose and mouth
FRACTION OF INSPIRED OXYGEN:
FRACTION OF INSPIRED OXYGEN:
Delivers an FiO2 of 60% to 75% at flow rates of 6 to 11 L/min.
ADVANTAGES: Partial rebreather mask
The mask has a reservoir bag attached with no valve, which allows the client to rebreathe up to ⅓ of exhaled air together with room air. It also allows easier humidification of oxygen.
DISADVANTAGES - Partial rebreather mask
● Complete deflation of the reservoir bag during inspiration causes CO2 buildup.
● The FiO2 varies with the client’s breathing pattern.
● Clients who have anxiety or claustrophobia do not tolerate it well.
● Eating, drinking, and talking are impaired.
● The bag can twist or kink easily.
NURSING ACTIONS - Partial rebreather mask
● Keep the reservoir bag from deflating by adjusting the oxygen flow rate to keep the reservoir bag ⅓ to ½ full on inspiration.
● Assess proper fit to ensure a secure seal over nose and mouth. Assess for skin breakdown beneath the edges of the mask and bridge of the nose.
● Make sure the client uses a nasal cannula during meals.
● Use with caution for clients who have a high risk of aspiration or airway obstruction.
Non-rebreather mask
Covers the client’s nose and mouth
FRACTION OF INSPIRED OXYGEN:
FRACTION OF INSPIRED OXYGEN:
Delivers an FiO2 of 80% to 95% at flow rates of 10 to 15 L/min to keep the reservoir bag ⅔ full during inspiration and expiration.
ADVANTAGES - Non-rebreather mask
It delivers the highest O2 concentration possible (except for intubation).
● A one‑way valve situated between the mask and reservoir allows the client to inhale maximum O2 from the reservoir bag. The two exhalation ports have flaps covering them that prevent room air from entering the mask.
DISADVANTAGES - Non-rebreather mask
The valve and flap on the mask must be intact and functional during each breath.
● It is poorly tolerated by clients who have anxiety or claustrophobia.
● Eating, drinking, and talking are impaired.
● Use with caution for clients who have a high risk of aspiration or airway obstruction.
NURSING ACTIONS - Non-rebreather mask
Perform an hourly assessment of the valve and flap.
● Assess proper fit to ensure a secure seal over the nose and mouth. Assess for skin breakdown beneath the edges of the mask and bridge of nose.
● Make sure the client uses a nasal cannula during meals.
HIGH‑FLOW OXYGEN DELIVERY SYSTEMS
Venturi mask / Aerosol mask
Venturi mask
Covers the client’s nose and mouth
FRACTION OF INSPIRED OXYGEN:
Delivers an FiO2 of 24% to 50% at flow rates of 4 to 12 L/min via different size adapters, which allows specific amounts of air to mix with oxygen.
ADVANTAGES Venturi mask
It delivers the most precise oxygen concentration w/ humidity added.
● Best for clients who have chronic lung disease.
DISADVANTAGES Venturi mask
Use is expensive.
● Eating, drinking, and talking are impaired.
● The mask and added humidity can lead to skin breakdown.
NURSING ACTIONS Venturi mask
Assess frequently to ensure an accurate flow rate.
● Assess proper fit to ensure a secure seal over the nose and mouth. Assess for skin breakdown beneath the edges of the mask, particularly on the nares.
● Make sure the tubing is free of kinks.
● Ensure that the client wears a nasal cannula during meals.
Aerosol mask
Face tent: fits loosely around the face and neck
Tracheostomy collar: a small mask that covers the surgically created opening of the trachea
FRACTION OF INSPIRED OXYGEN
● Delivers an FiO2 of 24% to 100% at flow rates of at least 10 L/min.
● Provides high humidification with oxygen delivery.
ADVANTAGES Aerosol mask
● Use with clients who do not tolerate masks well.
● Useful for clients who have facial trauma, burns, and thick secretions.
DISADVANTAGES: Aerosol mask
High humidification requires frequent monitoring.
NURSING ACTIONS Aerosol mask
● Empty condensation from the tubing often.
● Ensure adequate water in the humidification canister.
● Ensure that the aerosol mist leaves from the vents during inspiration and expiration
● Make sure the tubing does not pull on the tracheostomy.