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Related Concept Videos

Local Anesthetics: Clinical Application as Intravenous Regional Anesthesia01:16

Local Anesthetics: Clinical Application as Intravenous Regional Anesthesia

377
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.
One of the advantages of...
377
Local Anesthetics: Differential Sensitivity of Nerve Fibers01:24

Local Anesthetics: Differential Sensitivity of Nerve Fibers

793
Local anesthetics (LAs) block the sodium channels of nerve trunks, sensory nerve endings, and neuromuscular junctions. Although LAs can block all kinds of nerves, the sensitivity of nerve fibers differs according to nerve types and structures. LAs are known to block myelinated fibers faster than unmyelinated ones. Also, they block pain or sensory neurons at low concentrations without affecting the motor neurons involved in muscle contractions. This helps relieve labor pain without affecting the...
793
Local Anesthetics: Clinical Application as Surface, Infiltration, and Conduction Block Anesthesia01:30

Local Anesthetics: Clinical Application as Surface, Infiltration, and Conduction Block Anesthesia

987
Depending on the target organ, local anesthetics (LAs) can be administered via various routes. In surface anesthesia, LAs are applied directly to the surface of the skin or mucous membranes. It is widely used for topical skin numbing before venipuncture or minor surgical procedures. Commonly used surface local anesthetics are lidocaine or benzocaine sprays or creams. Surface anesthesia occurs within 5 minutes and lasts for about 60 minutes. One of the main disadvantages of topical anesthesia is...
987
Local Anesthetics: Clinical Application as Spinal Anesthesia01:11

Local Anesthetics: Clinical Application as Spinal Anesthesia

591
Spinal anesthetics are given during lower abdomen and limb surgeries to block sensory and motor neurons. They are administered in the mid to low lumbar regions, primarily acting on the cauda equina's nerve roots. The blockade level depends on the local anesthetic (LA) concentration. Usually, low LA concentrations are sufficient to block sensory fibers, while only high LA concentrations block motor fibers. Other factors like injection volume and speed, the patient's posture, and the drug...
591

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Related Experiment Video

Updated: Jun 12, 2025

Author Spotlight: Enhancing Success of Ultrasound-Guided Neuraxial Anesthesia in Cases with Difficult Anatomy
03:14

Author Spotlight: Enhancing Success of Ultrasound-Guided Neuraxial Anesthesia in Cases with Difficult Anatomy

Published on: January 31, 2025

301

Ultrasound-Guided Nerve Blocks.

David A Martin1, Henry Ashworth1, Arun Nagdev1

  • 1Department of Emergency Medicine, Alameda Health System - Highland Hospital, 1411 East 31st Street, Oakland, CA 94602, USA.

Emergency Medicine Clinics of North America
|September 26, 2024
PubMed
Summary

Ultrasound-guided nerve blocks offer an efficient pain management solution for emergency department patients with acute injuries. This technique provides a valuable alternative to lengthy procedural sedation methods.

Keywords:
Multimodal analgesiaNerve blocksPain managementPoint-of-care ultrasound

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Area of Science:

  • Emergency Medicine
  • Pain Management
  • Anesthesiology

Background:

  • Acute injuries in the emergency department (ED) often require effective pain management.
  • Multimodal pain strategies are crucial for optimizing patient care.
  • Procedural sedation can be time-consuming and resource-intensive in the ED setting.

Purpose of the Study:

  • To evaluate ultrasound-guided nerve blocks as a component of multimodal pain management.
  • To assess the efficiency of ultrasound-guided nerve blocks compared to procedural sedation.

Main Methods:

  • Utilized ultrasound guidance for peripheral nerve blocks.
  • Integrated nerve blocks into the pain management protocols for acutely injured ED patients.
  • Compared procedural times and resource utilization with traditional procedural sedation.

Main Results:

  • Ultrasound-guided nerve blocks demonstrated significant utility in managing acute pain.
  • The procedure offered a more efficient alternative to procedural sedation for specific patient populations.
  • Successful pain reduction was observed in patients receiving nerve blocks.

Conclusions:

  • Ultrasound-guided nerve blocks are a valuable and efficient tool for acute pain management in the emergency department.
  • This technique enhances multimodal pain strategies, potentially reducing the need for procedural sedation.