Abstract: Objective To construct a phase intervention program for parents of infants with enterostomy based on Timing it Right (TIR) theory. Methods Based on the framework of TIR theory, the draft of the intervention program was developed after literature review, and 10 experts were selected to modify the intervention period and specific measures after 2 rounds of expert letter consultation. Finally, the construction of the phase intervention program for parents of infants with enterostomy was completed. Results The recovery rate and enthusiasm of experts were 100%; the expert authority coefficients were all greater than 0.90, and Kendall’s W coefficients were 0.223 and 0.293, respectively, with statistical significance (P<0.05). After two rounds of expert consultation, four intervention phases which included perioperative period, discharge preparation period, adjustment period and adaptation period, were finally determined, and 13 intervention measures, including sending education handbook and video in the hospital, guiding how to make use of enterostomy model to practice, and the combination of ostomy nursing specialist outpatient service and online extended care service after discharge, etc. Conclusion The TIR theory-based phase intervention program for parents of infants with enterostomy is scientific and reliable, which provides reference and guidance for the formulation of nursing support and the development of extending nursing for infants with enterostomy as well as their parents in different phases.

Key words: timing it right, enterostomy, parent, Delphi, intervention program