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Related Concept Videos

Local Anesthetics: Clinical Application as Intravenous Regional Anesthesia01:16

Local Anesthetics: Clinical Application as Intravenous Regional Anesthesia

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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.
One of the advantages of...
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Local Anesthetics: Adverse Effects01:12

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While local anesthetics are generally safe and well-tolerated, they can occasionally cause adverse effects that vary in severity. Local anesthetics can induce toxicity at two distinct levels. They can either produce local effects through direct contact with the neural elements or be absorbed into the bloodstream from the injection site, leading to systemic effects.
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Local Anesthetics: Differential Sensitivity of Nerve Fibers01:24

Local Anesthetics: Differential Sensitivity of Nerve Fibers

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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...
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Peripheral Artery Disease V: Postoperative Nursing Management01:23

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During the postoperative period, it is crucial to focus on maintaining circulation, identifying and managing potential complications, and planning for discharge.Nursing AssessmentVital signs monitoring: Regularly monitor vital signs, including blood pressure, heart rate, respiratory rate, and temperature, to detect early signs of complications such as bleeding and infection.Circulation assessment: Monitor pulses, perform Doppler assessments, and check capillary refill, color, temperature, and...
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Nondepolarizing (Competitive) Neuromuscular Blockers: Pharmacological Actions01:27

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Nondepolarizing neuromuscular blockers prevent the membrane depolarization of muscle cells and inhibit muscle contraction. These are usually administered with anesthetics to achieve complete muscle relaxation. Upon administration, these drugs first block the small, rapidly contracting muscles of the face and hands, followed by the larger muscles of the trunk and the intercostal muscles. The diaphragm is the last muscle to be affected.
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Local Anesthetics: Clinical Application as Surface, Infiltration, and Conduction Block Anesthesia01:30

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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...
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[Risks when applying peripheral nerve blocks].

Alex Jørgen Romanowski1, Jakob Hessel Andersen2, Peter Toquer3

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Peripheral nerve blocks may cause temporary nerve damage. Current research is insufficient to establish consensus on their use in patients at risk for acute compartment syndrome, highlighting a need for more interdisciplinary studies.

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Area of Science:

  • Anesthesiology
  • Orthopedic Surgery
  • Trauma Care

Background:

  • Peripheral nerve blocks are commonly used for pain management.
  • A potential risk includes temporary direct nerve damage.
  • There is a lack of consensus regarding their use in patients at risk for acute compartment syndrome (ACS).

Purpose of the Study:

  • To review the current literature on peripheral nerve blocks and their potential impact on the diagnosis of acute compartment syndrome.
  • To highlight the differing opinions and lack of consensus among anesthesiology and orthopedic associations.
  • To advocate for increased interdisciplinary research in this area.

Main Methods:

  • Literature review of existing studies and guidelines.
  • Analysis of differing opinions from anesthesiology and orthopedic associations.
  • Identification of research gaps and areas for future investigation.

Main Results:

  • Peripheral nerve blocks carry a small risk of temporary direct nerve damage.
  • Existing research is insufficient to determine if nerve blocks delay the diagnosis of acute compartment syndrome.
  • Significant divergence exists between anesthesiology and orthopedic associations regarding the use of nerve blocks in at-risk patients.

Conclusions:

  • Further interdisciplinary research is crucial to address the diagnostic challenges posed by peripheral nerve blocks in patients susceptible to acute compartment syndrome.
  • An evidence-based discussion is needed to establish clear guidelines and consensus.
  • The current lack of consensus necessitates a cautious approach in at-risk populations.