The patient's body weight is often taken as a basis when calculating drug doses and determining equipment sizes for pediatric patients presenting to the emergency department.

The methods used to determine body weight are the family's estimated weight, formulas for estimating weight according to age, or the Broselow band used to estimate weight according to height.

Weight estimates that are incomplete compared to the child's actual body weight lead to medication errors, wrong material selection and prolongation of the procedure, resulting in increased mortality and morbidity.

This study will be carried out to create an evidence-based practice in the selection of catheters to be used during peripheral intravenous catheter insertion, urinary catheter insertion, nasogastric/orogastric catheter insertion and aspiration in children using the Broselow band in non-resuscitation applications coming to the Pediatric Emergency Department.

By using the Boselow band in non-resuscitation pediatric emergency department applications, reducing the number of attempts and errors by ensuring the correct equipment selection in the procedures applied to patients, and increasing the success of the procedure; This will be done to ensure that the decisions taken by nurses using their experience and previous knowledge are more systematic.

Inclusion Criteria:

• Children weighing 3 to 36 kg and 47 to 143 cm tall
• Children aged 0-18
• Patients coming to the emergency department for non-resuscitation procedures
• Patients and their families who volunteer to participate in the research
• Patients who will have a peripheral intravenous catheter inserted
• Patients who will have a urinary catheter inserted
• Patients who will have a nasogastric/orogastric catheter inserted
• Patients who will undergo aspiration procedure

Exclusion Criteria:

• Children weighing less than 3 kg and taller than 143 cm
• Children with anomaly contractures that may prevent measurement during measurement with the Broselow tape
• Patients with central venous catheter
• Patients with peripheral intravenous catheters outside the pediatric emergency department
• Patients who have a urinary catheter inserted outside the pediatric emergency department
• Patients who have a nasogastric/orogastric catheter inserted outside the pediatric emergency department

In the research, control group data will be collected first. After the data of the control group is collected, the data of the experimental group will be collected.