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Intravenous regional anesthesia or the Bier block technique is used to anesthetize a specific limb or extremity. It uses exsanguinated or blood-drained vessels to transport local anesthetics or LAs to the peripheral nerve trunks. Lidocaine without vasoconstrictors like epinephrine is most commonly used for this technique. Other drugs used are prilocaine, ropivacaine, and chloroprocaine. Bupivacaine is not recommended for this technique due to its high cardiac toxicity.
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Regional anesthesia for cardiac surgery.

Thomas J Caruso1, Kiley Lawrence2, Ban C H Tsui1

  • 1Department of Anesthesiology, Perioperative, and Pain Medicine, Division of Pediatric Anesthesia, Stanford University School of Medicine.

Current Opinion in Anaesthesiology
|July 30, 2019
PubMed
Summary

Regional anesthesia techniques can reduce opioid use and complications in cardiac surgery. Emerging methods like erector spinae plane blocks offer potentially safer alternatives to traditional approaches, though more research is needed.

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Area of Science:

  • Anesthesiology
  • Cardiovascular Surgery
  • Pain Management

Background:

  • Traditional cardiac anesthesia relies on high-dose opioids, linked to prolonged intubation and increased morbidity.
  • Opioid exposure in hospitals raises concerns about dependency and patient outcomes.
  • Regional techniques are explored as adjuncts for perioperative analgesia in cardiac surgery.

Purpose of the Study:

  • To review conventional and novel regional anesthesia techniques for cardiac surgery.
  • To highlight the benefits and risks associated with different regional approaches.
  • To identify areas for future research in perioperative pain management for cardiac patients.

Main Methods:

  • Review of established regional anesthesia techniques (thoracic epidurals, paravertebral blocks).
  • Exploration of emerging superficial regional blocks (parasternal, pectoral, erector spinae plane blocks).
  • Analysis of potential benefits such as reduced opioid exposure and perioperative myocardial infarction.

Main Results:

  • Thoracic epidurals and paravertebral blocks show benefits but have limited adoption.
  • Newer superficial blocks may offer lower risks, especially in anticoagulated patients.
  • Promising efficacy data for novel techniques exist, but large-scale studies are lacking.

Conclusions:

  • Emerging regional techniques show potential as effective perioperative analgesic adjuncts in cardiac surgery.
  • Further well-designed studies are required to confirm the safety and efficacy of these blocks.
  • Optimizing regional anesthesia can improve patient outcomes and reduce opioid-related complications.