Wheezing in infants: the response to epinephrine

Area of Science:

• Pediatrics
• Respiratory Medicine

Background:

• Wheezing in infants is a common condition with controversial treatment options.
• Bronchodilator therapy's role in infant wheezing remains debated.

Purpose of the Study:

• To evaluate the effectiveness of subcutaneous epinephrine versus placebo for acute wheezing in children under 24 months.
• To assess respiratory distress using a standardized instrument.

Main Methods:

• A double-blind, randomized trial comparing subcutaneous epinephrine to normal saline placebo.
• Respiratory assessments were conducted using the Respiratory Distress Assessment Instrument before and after injections.
• Strict criteria were used to define improvement in respiratory status.

Main Results:

• Significantly more children receiving epinephrine improved (9/16) compared to placebo (1/14) (P = .0067).
• Improvement rates were higher in younger infants (63% <12 months) and older infants (92% 12-24 months).
• Seven of ten children with respiratory syncytial virus bronchiolitis showed improvement with epinephrine.

Conclusions:

• Subcutaneous epinephrine is effective in treating acute wheezing in children under 24 months.
• The study provides evidence supporting the use of epinephrine for infant wheezing.
• Response to initial epinephrine dose may not predict final outcome.