Effects of shoulder rotation and table tilt maneuvers on the lumbar and thoracic paramedian acoustic window in older adults: a quasi-experimental study.
Nunes de Souza MV; Caetano AMM; Duarte NMC; Nunes de Souza CT; Bezerra AJL; Silva ETAGBB · 2026 · Brazilian journal of anesthesiology (Elsevier)
WASTE classifies this as Negative / Null Result Report · AI classification, approximate
The study found no significant effect — useful as a negative control or null benchmark for your own design.
Abstract (excerpt)
Background Shoulder rotation and table tilt have been reported to increase the acoustic window for spinal ultrasonography. However, evidence in older adults remains scarce. This study evaluated their anatomical effects on lumbar (L3-L4)…
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Metadata source: Europe PMC · DOI 10.1016/j.bjane.2026.844769