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August 20, 2025Annals of African Medicine

Ultrasound-guided Assessment of Phrenic Nerve Involvement after Interscalene Brachial Plexus Block

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Authors

JBJyothi BiradarManipal Academy of Higher EducationMEM. V. EeshwarManipal Academy of Higher EducationLSLaxmi ShenoyManipal Academy of Higher Education

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Implication

Observational study reveals incidence of hemidiaphragmatic paresis in patients receiving interscalene brachial plexus block, suggesting volume of local anesthesia impacts outcomes.

Key Points

  • Significant increase in hemidiaphragmatic paresis was noted with higher local anesthesia volume.
  • In patients receiving 20–30 mL of local anesthetic, 66.7% experienced total hemidiaphragmatic paresis during quiet breathing.
  • This observational study tracked diaphragmatic excursions before and after interscalene brachial plexus block administration using ultrasound.
  • The findings highlight a correlation between local anesthesia volume and diaphragm function, underscoring important perioperative considerations.

Cite This Study

Biradar et al. (2025) studied this question.

synapsesocial.com/papers/68af4eb9ad7bf08b1ead7743https://doi.org/10.4103/aam.aam_154_25
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Also Consider

Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Interscalene Brachial Plexus Block with Bupivacaine and Ropivacaine in Patients with Chronic Renal Failure: Diaphragmatic Excursion and Pulmonary Function Changes2005 · 32 citations
  2. 2Prolonged Horner??s Syndrome After Inter scalene Block1994 · 32 citations
  3. 3Hemidiaphragmatic Paresis During Interscalene Brachial Plexus Block1992 · 327 citations
  4. 4Ultrasonographic evaluation of diaphragmatic motion.2001 · 320 citations