Final answer:
Parents of a child with moderate persistent asthma should be instructed to use a peak flow meter to monitor respiratory status regularly, which is the best option among those provided. Outdoor activities should be approached with caution and awareness of triggers. Other options presented regarding water intake and rescue inhaler use are not appropriate for proper asthma management.
Step-by-step explanation:
The discharge teaching for parents of a child with moderate persistent asthma should focus on managing the condition effectively and preventing exacerbations. From the given options, Option 4 is the most appropriate to include in the instructions. The nurse should definitely teach the parents how to use a peak flow meter to regularly monitor their child's respiratory status. A peak flow meter is a valuable tool that can provide early warning of an impending asthma exacerbation, allowing for timely intervention. It is important to use it regularly and record the readings to track the child's respiratory function over time.
Option 1, which suggests encouraging outdoor activities, could be acceptable with caution, as environmental factors can sometimes trigger asthma symptoms. However, proper moderation and awareness of triggers would be necessary. Option 2, limiting water intake, does not typically relate to asthma management and may be inappropriate advice. Option 3, using the rescue inhaler only during asthma attacks, neglects the importance of regular use of control medication which can prevent attacks and is not the recommended practice for managing moderate persistent asthma.