Medical gases (Practice Questions) And Quality Answers | ACE THE TEST| 2026/27

Medical Gas Therapy refers to - CORRECT ANSWER deliverance of gases for therapeutic purposes Oxygen is a prescribed drug that is given to patients requiring - CORRECT ANSWER emergency life support, pulmonary disability, and post-operative states that have or may develop cardiopulmonary complications. What are the three types of oxygen delivery - CORRECT ANSWER 1) Low-flow, (2) High-flow, and (3)Reservoir three ways to determine the need for oxygen therapy - CORRECT ANSWER Documented labs, a specific clinical problem or condition, and hypoxemia What is an air entrainment system - CORRECT ANSWER delivers direct high-pressure oxygen through a small nozzle or jet surrounded by ports. It depends on the air-to-oxygen ratio and amount of flow resistance downstream for the mixing site. How can oxygen toxicity be avoided - CORRECT ANSWER Limit patient exposure to 100% oxygen to less than 24 hours whenever possible. A high FiO2 is okay when the concentration can be decreased to 70% within 2 days and 50% or less in 5 days When are bag-mask devices used - CORRECT ANSWER emergency life support, critical care, and can provide up to 100% FiO2 What is Carbon Dioxide-Oxygen therapy - CORRECT ANSWER treatment for hiccups, carbon monoxide poisoning, and to prevent a complete CO2 washout. (Rarely used) What are enclosures - CORRECT ANSWER They are the oldest form of oxygen therapy, such as oxygen tents, hoods, and incubators How do you estimate the FiO2 with a low flow system - CORRECT ANSWER 1 L/min of nasal oxygen increases the FiO2 by 4%. 1L/min starts at an FiO2 of 24% examples of a reservoir system - CORRECT ANSWER Reservoir cannula, reservoir mask, and non-rebreathing reservoir circuit Describe a flow of less than 5 L/min in a reservoir mask - CORRECT ANSWER It acts as dead space and causes CO2 rebreathing What is heliox therapy - CORRECT ANSWER It is used to reduce the work of breathing, in patients with severe acute asthma or upper airway obstructions What is a high-flow nasal cannula - CORRECT ANSWER provides heated and humidified oxygen up to 60 L/min. can be hard to determine the amount of positive pressure delivered What is the high-flow system - CORRECT ANSWER Oxygen therapy equipment that supplies inspired gases at a consistent preset oxygen concentration How does oxygen therapy correct hypoxemia - CORRECT ANSWER By increasing the alveolar and blood levels of oxygen What is hyperbaric oxygen therapy - CORRECT ANSWER The therapeutic application of oxygen at pressures greater than one atm What are some causes of hypoxemia - CORRECT ANSWER Pulmonary vasoconstriction and pulmonary hypertension Hypoxemia can cause other manifestation such as - CORRECT ANSWER Tachypnea, tachycardia, cyanosis, and a distressed appearance What is the most common mode of respiratory therapy - CORRECT ANSWER Gas therapy What are the most common air entrainment devices - CORRECT ANSWER Air entrainment mask (i.e. Venturi mask) and air entrainment nebulizer What are oxygen blenders - CORRECT ANSWER They help provide a precise FiO2 by mixing air and oxygen. Air and oxygen enter this device and pass through dual pressure regulators to match pressures What can oxygen reduce - CORRECT ANSWER It can help to reduce high ventilatory demand and the work of breathing What are oxygen hoods - CORRECT ANSWER The best method for controlled oxygen therapy for infants and also allows access for infant care. It has a heated air entrainment nebulizer What are oxygen tents - CORRECT ANSWER A method for delivering cooled oxygen to pediatric patients. The opening often makes it hard to keep the oxygen concentration at the needed level. It's used mostly for pediatric aerosols for croup What is a reservoir mask - CORRECT ANSWER It is the most common reservoir system. The types include: simple mask, partial re-breathing mask, and nonrebreathing mask What is a reservoir system - CORRECT ANSWER An oxygen delivery system that provides a reservoir oxygen volume that the patient taps into when the patient's inspiratory flow exceeds the device flow. What is retinopathy of prematurity (ROP) - CORRECT ANSWER An abnormal ocular condition that occurs in some premature or low birth-weight infants who receive oxygen. What are the two types of reservoir cannulas - CORRECT ANSWER Nasal reservoir and pendant reservoir How is a transtracheal catheter placed - CORRECT ANSWER It is surgically placed in the trachea through the neck by a physician Hyperbaric Oxygen Therapy is administered via what - CORRECT ANSWER It is administered via a multiplace or monoplace chamber What are two acute conditions for which Hyperbaric Oxygen would be administered - CORRECT ANSWER Air embolism and Carbon Monoxide Poisoning. What bedside findings would lead to the necessity of oxygen therapy - CORRECT ANSWER Tachypnea, tachycardia, and confusion What are determining factors for oxygen toxicity - CORRECT ANSWER The PO2 and exposure time What are drawbacks of Hyperbaric Oxygen therapy - CORRECT ANSWER Ear or sinus trauma (i.e. busted eardrum), worsened pneumothorax (don't use if diagnosed), oxygen toxicity, fire (not spontaneous combustion) What are the drawbacks to Nitric Oxide Therapy - CORRECT ANSWER Poor paradoxical response, rebound hypoxemia, and pulmonary hypertension What are examples of high flow oxygen delivery systems - CORRECT ANSWER They provide 100% of the patient's oxygen needs. Examples are: High flow nasal cannula, Cascade high-flow, Passover high-flow, and Venturi Mask What are examples of low flow oxygen delivery systems - CORRECT ANSWER They provide part of the patient's oxygen needs. Examples are: Nasal cannula, regular mask, partial rebreather mask, oxymizer, and a non-rebreather mask.