Exam 18: Administration of Gas Mixtures

After increasing the inspiratory flow of the ventilator to decrease the generation of NO₂ the therapist notices many changes in the ventilator parameters.The therapist adds the NO into the inspiratory limb of the ventilator circuit close to the patient.What will be a limitation of the procedure?

The respiratory therapist has initiated iNO at 20 ppm for an infant with pulmonary hypertension.After 2 hours a blood gas test reveals a 10% improvement in SaO₂.What should the therapist do?

What is the product of the reaction between oxygen and nitric oxide?

What is the purpose of administering helium-oxygen gas mixtures to patients?

Which of the following substances prevents the release of Ca²⁺ from the sarcoplasmic reticulum?

The therapist is evaluating a small tachypneic infant receiving heliox mixture 70:30 through an infant hood.Although the SpO₂ has improved,the child shows signs of worsening work of breathing.What is the most probable mechanism to explain this situation?

The therapist taking care of an infant on iNO observes that the NO₂ levels have been increasing.In order to correct the situation he increases the inspiratory flow of the ventilator.What will be some of the limitations associated with this change? I.It reduces time of contact between NO and O₂. II.It affects the mean airway pressure because it changes the inspiratory time. III.It may increase the delivered tidal volume. IV.It reduces the mean airway pressure and increases the inspiratory time.

The therapist is using an oxygen flowmeter to deliver an 80:20 heliox mixture to a patient.The reading on the flowmeter is 10 L/minute.What is the actual flow received by the patient?

An infant on high-flow nasal cannula also requires administration of albuterol every 6 hours.The flow of the cannula was adjusted from 4 to 5 liters per minute.How could this affect the aerosol delivery to this infant?

Which of the following inhaled anesthetic gases has/have demonstrated the possibility to treat status asthmaticus? I.Halothane II.Thromboxane III.Isoflurane IV.Sevoflurane

Which of the following inhaled anesthetics should the therapist recommend to administer via a face mask to a conscious,spontaneously breathing pediatric patient who has status asthmaticus?

Although very small amounts of NO₂ are present at the bedside,which health care workers need to exert special precautions to minimize exposure to NO₂?

The therapist is performing a routine assessment and ventilator check on a patient who is receiving heliox near the wye adapter of the ventilator circuit.He notices a serious discrepancy between the set tidal and the exhaled volume.What should the therapist do to correct this situation?

The therapist is treating a very irritable young child with upper airway obstruction.Which oxygen device will be the most appropriate to administer the greatest concentration of helium?

Which of the following medications contributes to an increased right-to-left intrapulmonary shunting?

Inhaled NO has been administered to an infant for nearly 4 hours.The respiratory therapist notices suboptimal response and suggests HFOV.What is the principle behind the potential benefit of adding this ventilatory modality to this infant?

What is the potential benefit of adding heliox to patients who have status asthmaticus while undergoing mechanical ventilation?

Which of the following parameters of mechanical ventilation are affected negatively by the use of heliox?

Vascular smooth muscle is largely dependent on which of the following Intracellular ions?

An infant has been receiving iNO for the last 3 days.Which important level should be monitored when ordering a co-oximetry?