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17 terms

Humidity and aerosol therapy

What is the primary goal of humidity in respiratory care?
The primary goal of humidification is to maintain normal physiologic conditions in the airways.
List the roles that bland aerosol therapy has in respiratory care.
To treat upper airway edema, overcome heat and humidity deficits in patients with tracheal airways, and to help obtain sputum specimens.
What is the goal of aerosol drug therapy
To deliver therapeutic doses of selected drugs to the desired site of action.
5 mechanisms for artificially adding humidity to a gas?
Bubble, passover, wick, and membrane humidifiers and heat and moisture exchangers are the mechanisms for adding water vapor to a gas.
What is humidity
Humidity is the addition of water vapor to a gas and can be measured with a hygrometer.
What does humidity consist of?
molecular water
What is an aerosol?
An aerosol is a suspension of solid or liquid particles in a gas.
How does humidity differ from aerosol?
Humidity is composed of only water, whereas aerosol can be water or another substance such as pollen, dust, and so on.
What is humidity used for in resp care
Humidity is used to maintain normal physiologic conditions in the airways.
Why is humidity therapy necessary when supplemental oxygen is administered?
Supplemental oxygen is cold and dry and causing drying of the airways and reduce cilia mobility.
What is aerosol therapy used in resp care?
Aerosols may be bland or medicated. Bland aerosol is used to humidify bypassed airways, induce sputum, or reduce upper airway edema. Medicated aerosol therapy is the delivery of a therapeutic dose of a selected agent to the desired site of action (for example: a β2-agonist or anticholinergic).
7 clinical signs and symptoms, along w the administration of dry medical gas, are indications for humidity therapy?
(1) Atelectasis; (2) dry, nonproductive cough; (3) increased airway resistance; (4) infection; (5) increased work of breathing; (6) substernal pain; and (7) thick, dehydrated secretions.
7 indications for the use of cool humidified gas (bland aerosol) as mentioned in the American Association for Resp Care (AARC) C(CPG) for bland aerosol Administration.
(1) The presence of upper airway edema; (2) laryngotracheobronchitis; (3) subglottic edema; (4) postextubation edema; (5) postoperative management of the upper airway; (6) the presence of a bypassed upper airway; and (7) the need for sputum specimens or mobilization of secretions.
13 hazards and complications. Humidification during mechanical ventilation assoc w heated humidification.
1) High flow rates during disconnect might aerosolize contaminated condensate; (2) underhydration and mucus impaction; (3) increased work of breathing; (4) elevated airway pressures caused by condensation; (5) patient-ventilator dysynchrony and improper ventilator function caused by condensation in the circuit; (6) hypoventilation and gas-trapping caused by mucus plugging; (7) hypothermia; (8) burns to caregivers from hot metal; (9) potential electrical shock; (10) airway burns or tubing meltdown if heated-wire circuits are covered or incompatible with humidifier; (11) possible increased work of breathing caused by mucus-plugging; (12) unintended tracheal lavage from inadvertent overfilling; and (13) inadvertent tracheal lavage from pooled condensate in circuit.
5 contraindications for use of HMEs?
(1) Patients with thick, copious, or bloody secretions; (2) patients with expired tidal volume <70% of the delivered tidal volume because of large bronchopleural fistulas or incompetent or absent endotracheal tube cuffs; (3) patients with body temperature <32°C; (4) patients with minute volumes >10 L/min; (5) must be removed from the patient circuit during inline aerosol drug treatment
2 containdications for the use of bland aerosol administration?
Bronchospasm and history of airway hyperresponsiveness
What type of humidifier brings the gas under the surface of the water?
Bubble humidifier