This study aims to evaluate the effects of Pursed-Lip Breathing (PLB) exercises on physiological parameters (such as respiratory rate, heart rate, and oxygen saturation) and discharge readiness in children diagnosed with pneumonia. The study is designed as a randomized controlled trial involving pediatric patients between the ages of 3 and 4. The intervention includes guided PLB exercises performed twice daily for three consecutive days. Data will be collected before and after each session to assess changes in physiological measures and readiness for hospital discharge.

Pneumonia remains one of the leading causes of hospitalization and morbidity in early childhood, often requiring supportive respiratory interventions. Pursed-Lip Breathing (PLB) is a simple, non-pharmacological respiratory technique that has shown promise in improving respiratory function by increasing exhalation time, enhancing oxygenation, and reducing respiratory workload.

This randomized controlled trial aims to evaluate the effects of PLB exercises on physiological parameters (respiratory rate, heart rate, and oxygen saturation) and readiness for hospital discharge in children aged 3-4 years diagnosed with community-acquired pneumonia. Participants will be randomized into intervention and control groups. The intervention group will receive PLB exercises using a toy-based blowing device (saxophone ball blower) twice daily for three consecutive days under supervision, while the control group will receive standard care.

Physiological parameters will be measured immediately before and after each PLB session using standardized methods. In addition, parental perception of discharge readiness will be assessed using the Pediatric Readiness for Hospital Discharge Scale - Parent Form (Ped-RHDS) on the first and third days of hospitalization.

The study hypothesizes that PLB exercises will lead to improved oxygen saturation, reduced respiratory and heart rates, and increased readiness for discharge in the intervention group compared to controls. This research will contribute to the evidence supporting non-pharmacological nursing interventions that can enhance respiratory outcomes and discharge processes in pediatric pneumonia patients.

Inclusion Criteria:

• Children aged 3 to 4 years
• Diagnosed with community-acquired pneumonia (CAP), defined as pneumonia occurring in a previously healthy child within 14 days of symptom onset and requiring hospitalization
• The child's primary caregiver is the mother
• Both mother and child must remain in the hospital for at least 3 days
• Hospitalization due to pneumonia with an expected average stay of 4-5 days, based on disease severity and clinical condition
• Mother must be present as a caregiver throughout the hospital stay
• Voluntary participation with signed informed consent from the parent or legal guardian

Exclusion Criteria:

• Presence of any chronic disease in addition to pneumonia
• Mother not staying as a caregiver during hospitalization
• Withdrawal of consent by the mother and/or child
• Discharge before 3 days for any reason (e.g., refusal of treatment, early discharge request)

Individual participant data (IPD) that underlie the results reported in this study (after de-identification) will be shared with qualified researchers. Data will be available for secondary analysis upon request, starting 6 months after publication and for a period of 2 years.

Beginning 6 months after publication and ending 2 years later.

With researchers who submit a methodologically sound proposal and receive approval from the study team.

Outcome assessors will be blinded to participant group assignments to minimize detection bias. Data analysis will also be conducted by an independent researcher who is unaware of group allocations. Due to the nature of the intervention, participants and intervention providers cannot be blinded.