Evidence map›Paper›PMID 40350157›Full record

ArticleAnesthesia and pain medicine2025

Pathway from anterior suprascapular nerve block to the phrenic nerve: a cadaveric dye study.

Sandeep Diwan, Deepika Sathe, Anjali Sabnis, Prakash Mane, Anju Gupta

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Article in Anesthesia and pain medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

3 citing papers in PubMed.

  1. Review
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors.

Sandeep DiwanDepartment of Anesthesiology, Sancheti Hospital, Pune, India.
Deepika SatheDepartment of Anesthesia, MGM Hospital, Navi Mumbai, India.
Anjali SabnisDepartment of Anatomy, MGM Hospital, Navi Mumbai, India.
Prakash ManeDepartment of Anatomy, MGM Hospital, Navi Mumbai, India.
Anju GuptaDepartment of Anesthesiology, Critical Care and Pain Medicine, All India Institute of Medical Sciences, New Delhi, India.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAnterior suprascapular nerve block is widely used for postoperative shoulder pain management. Although cadaveric studies show the spread and smudging of the phrenic nerve, our cadaveric injection investigation was conducted to investigate the pathway of diffusion of the dye toward the phrenic nerve from a more distal injection at the suprascapular nerve.

methodsWe injected 5 ml of 0.1% methylene blue dye into the proximal portion of the suprascapular nerve (infra-omohyoid in the posterior triangle) in 12 neck specimens from six cadavers. Following meticulous dissection, we assessed the spread of the dye along the brachial plexus to the nerve roots and traced the phrenic nerve for staining.

resultsThe phrenic nerve was stained in 41.7% of the cases, the inferior trunk of the brachial plexus was unstained in all cases (100%), and the posterior division and suprascapular nerve were stained in all cases (100%). The nerves to the subclavius, dorsal aspect of the superior trunk, and C5 and C6 roots were stained in all cases. Anterior division of the superior trunk was observed in 75% of the specimens. The dye-spread pathway along the brachial plexus was dorsal, sparing the ventral aspect.

conclusionsOur study demonstrated that the dye-spread pathway from the suprascapular nerve at the infra-omohyoid level to the phrenic nerve is dorsal to the brachial plexus.

Indexed as

Brachial plexusCadaverMethylene bluePain managementPhrenic nerveShoulder

Identifiers

PMID40350157
PMCPMC12066203

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