Final answer:
The statement is true. 'Spacer' and 'valved holding chamber' are global terms for devices attached to MDIs, improving medication delivery efficiency in respiratory conditions.
Step-by-step explanation:
The statement is true: A global term that describes or refers to extensions, auxiliary devices, or add-ons attached to Metered Dose Inhalers (MDIs) for administration includes 'spacer' and 'valved holding chamber'.
MDIs are commonly used devices for administering medication to individuals with respiratory conditions such as asthma or COPD. A spacer is a device that attaches to an MDI to help deliver medication more effectively by creating space between the patient's mouth and the medication spray, allowing for better inhalation and less medication to be deposited in the mouth and back of the throat. A valved holding chamber works similarly but has a one-way valve to hold the medication in the chamber until the patient inhales, which further ensures that a maximal amount of medication is delivered to the lungs.
The use of these devices can significantly improve the efficiency of the drug delivery and reduce the potential side effects associated with direct sprays from MDIs.