Anesthetic Considerations for Lower Extremity Surgeries in Children

Primary Anesthetic Approach: Multimodal Regional Technique

The American Society of Regional Anesthesia recommends using low-concentration local anesthetics to preserve some sensory and motor function, allowing detection of breakthrough pain that signals potential compartment syndrome 1, 2
The use of bupivacaine or ropivacaine 0.1-0.25% for single-shot blocks is recommended, with 0.1% concentration for continuous peripheral nerve blocks 1, 2, 3, 5
The European Society of Regional Anaesthesia suggests that ultrasound guidance should be used whenever available for safety and efficacy, although the citation provided is from Praxis Medical Insights 4

The American Academy of Pediatrics recommends administering NSAIDs and/or paracetamol pre-operatively or intra-operatively and continuing postoperatively 4
Continuing regular NSAIDs and paracetamol after block resolution is advised to prevent rebound pain 4

Normal compartment pressures are higher in children (13-16 mmHg) compared to adults (0-10 mmHg), according to the American Academy of Orthopaedic Surgeons 2, 3, 8, 5, 9
Younger children cannot articulate pain and paresthesia effectively, making it essential to use the "three As" for diagnosis: anxiety, agitation, and analgesic requirement 3, 8, 9
The incidence of ACS after pediatric trauma is 0.02%, with children aged 12-19 years at highest risk for tibial fractures, as reported by the Orthopaedic Trauma Association 3, 8, 9

The American Society of Anesthesiologists states that since ESRA/ASRA guidelines were published in 2015, there have been no cases of ACS in children associated with regional analgesia when proper protocols are followed 1, 2, 8, 5
An acute pain service must be available for ongoing assessment, and regular pain assessments using objective scoring charts are necessary 1, 2, 3, 4, 6

The American Society of Regional Anesthesia advises against using dense blocks of long duration that significantly exceed surgical duration, as well as avoiding high-concentration local anesthetics that eliminate all sensory function 1, 2, 6
Dense neuraxial or peripheral nerve blockade extended into the postoperative period may delay ACS diagnosis, according to the European Society of Regional Anaesthesia 9

Military experience demonstrates that continuous peripheral nerve blocks with low-dose local anesthetic solutions can be used safely even in high-energy injuries at risk of ACS, providing analgesia while preserving ability to detect breakthrough pain, as reported by the Society of Critical Care Medicine 10, 1, 6