Funds Review Exam 2 Flashcards
Identify the clinical objective for oxygen therapy
Active Humidifiers and Passive Humidifier:
– Active: actively adding heat or water or both to the device patient interface
–Passive: recycling exhaled heat and humidity from the patient
Identify the Humidifiers: Passover (active)
– pass gas over a large surface area of water
–directs gas over water surface
–maintains saturation at high flow rate
–add little or no flow resistance to spontaneous breathing circuits
–does not generate any aerosols that can spread infection
Identify the Humidifiers: Heat and Moisture exchangers
Identify the Humidifiers: Bubble Humidifiers
Goals of Humidity Therapy
–is the addition of water to the gas delivered to the airways
–is to maintain normal physiologic conditions
Goals of Bland Aerosol Therapy
–provides humidification with solution such as saline for therapeutic and diagnostic purpose
–to provide humidification of medical gases for patient with bypasses upper airway
Indications of Humidity Therapy
–maintain normal physiologic conditions
–humidify dry medical gases
–overcoming humidity deficit created when the upper airway is bypassed
–treating bronchospasm caused by cold air
–thick, copious, or bloody secretions
–with a body temp below 32
Indications of Bland Aerosol Therapy
–presence of upper airway edema
–Laryngotracheobronchitis (croup)
–Subglottic edema/Epiglottis
–Post-extubating edema
–Postoperative management of the upper airway
–presence of a bypassed upper airway
–need for sputum specimens or mobilization of secreation
Contraindications of Humidity therapy
–temperature: the higher the temperature of gas, more water it can hold
–Surface area: affects rate of evaporation
-the grater the area of contact between water and gas, the more opportunity there is for evaporation to occur
–Time of contact: evaporation increases as contact time increases, the longer a gas remains in contact with water, the greater opportunity for evaporation to occur
–Thermal mass: the greater the amount of water in humidifier, the greater the thermal mass and capacity to hold and transfer heat to therapeutic
Contraindications of Bland Aerosol Therapy
–Bronchoconstriction
–History of airway Hyperresponsiveness
Complications for Humidity Therapy
–potential electrical shock
–potential for burns to caregivers from hot metal
–hypothermia
–hyperthermia
–thermal injury
–underhydration and mucous impaction
–hypoventilation
–increased work of breathing
–airway burns or tubing meltdown
Complications with Bland Aerosol Therapy
–wheezing or bronchospasm
–infection
–overhydration
–patient discomfort
–caregiver exposure to airborne contagions produced during coughing or sputum induction
–edema of the airway wall
Cool Humidified Gas
Heated Humidification
–used
Passover Humidifiers: Simple Condenser Humidifier
–simple condenser units contain a condenser element with high thermal conductivity
–can recapture only some 50% of a patient’s exhaled moisture
–contain a condenser element with high thermal conductivity, usually consisting of metallic gauze, corrugated metal, or parallel metal tubes
Passover Humidifiers: Hygroscopic Condenser
– absorb moisture from the air
–these units typically achiever approximately 70% efficiency
