Ever wondered what happens when neuromuscular blocking agents infiltrate into surrounding tissue instead of flowing smoothly through an IV? The consequences can be serious and potentially life-threatening for patients recovering from anesthesia.We dive deep into a complication that affects nearly 14% of the 150 million peripheral IV catheter insertions performed annually in the United States. While most healthcare providers have experienced IV infiltrations, few understand the unique dangers posed when paralytics like rocuronium leak into surrounding tissues. This scenario creates unpredictable pharmacokinetics with delayed absorption that can lead to secondary recurarization – muscle weakness and respiratory compromise that may occur hours after a patient appears to have fully recovered.Experts Dr. Andrea Vannucci and Dr. Karolina Brook share their insights and clinical experience on this important patient safety topic. They outline a comprehensive management approach including immediate interventions (attempting medication aspiration, establishing alternative IV access), treating the infiltration site (with nitroglycerin paste and hyaluronidase), and preventing recurarization through careful medication dosing and extended monitoring. Most critically, they recommend monitoring extubated patients for a minimum of four hours following infiltration of neuromuscular blocking agents – a practice not universally followed but essential for patient safety.Whether you're an anesthesiologist, CRNA, resident, or any perioperative clinician, this episode provides crucial information to help you recognize, manage, and prevent complications from this common but potentially dangerous event. Subscribe to the Anesthesia Patient Safety Podcast for more evidence-based strategies to protect your patients from harm.For show notes & transcript, visit our episode page at apsf.org: https://www.apsf.org/podcast/268-beyond-the-vein-the-dangers-of-infiltrated-muscle-relaxants/© 2025, The Anesthesia Patient Safety Foundation

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