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Midclavicle block: An anatomical study.

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PubMed
Summary
This summary is machine-generated.

This anatomical study found that a dual clavipectoral fascia plane block (CPB) with subclavius muscle injection effectively distributes anesthetic around the mid-clavicle. However, it does not achieve complete periosteal coverage, suggesting potential limitations for full clavicle surgery pain management.

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Area of Science:

  • Anatomy
  • Regional Anesthesia
  • Surgical Neuroanatomy

Background:

  • Clavipectoral fascia plane block (CPB) efficacy may be linked to injectate spread to the anterosuperior clavicular periosteum.
  • Anatomical investigation combining CPB with subclavius muscle injection was performed.

Purpose of the Study:

  • To test the hypothesis that anesthetic injectate would fully cover both anterosuperior and posteroinferior surfaces of the clavicular periosteum in the midclavicular region.

Main Methods:

  • Observational human cadaver study involving 10 clavicular regions in five fresh cadavers.
  • Ultrasound-guided CPB and subclavius muscle injections were administered.
  • Anatomical dissection and methylene blue distribution analysis on the clavicular periosteum were conducted.

Main Results:

  • Methylene blue stained 37% ± 16% of the anterosuperior and 23% ± 13% of the posteroinferior clavicular periosteum, primarily in the middle third.
  • Complete circumferential coverage of the clavicular periosteum was not achieved.
  • Significant distribution and relevant coverage were observed, with close proximity between stained surfaces.

Conclusions:

  • The midclavicular dual block technique provides effective distribution around the middle third of the clavicle.
  • Complete circumferential periosteal anesthesia was not achieved, potentially leaving other pain sources unaddressed.
  • Further clinical studies are required to assess the efficacy of this dual block for clavicle surgery pain management.