Infrared Thermography for Prediction of Successful Erector Spinae Plane Block in Unilateral Inguinal Hernia Surgery in Paediatric Patients

Inclusion Criteria: * Age from 3 months to 6 years. * Both genders. * American Society of Anesthesiologists (ASA) Physical Status I-II. * Children undergoing elective unilateral open inguinal hernia surgery. Exclusion Criteria: * Parents' or guardians' refusal * Known Allergy to local anesthetics. * Coagulopathy \[international normalised ratio (INR) \>1.4 or platelets \<75.000\]. * Infection at the site of injection or wound close to the puncture site. * preexisting neuropathy (with sensory and/or motor deficits). * Diseases interfere with thermal imaging (as skin infections). * Baseline oesophageal body temperature of more than 37.5 °C. * Emergency and re-do cases will be excluded.