The effect of Valsalva maneuver in attenuating skin puncture pain during spinal anesthesia: a randomized controlled trial.
Sanjay KumarSujeet Kumar Singh GautamDevendra GuptaAnil AgarwalSanjay DhirrajSandeep KhubaPublished in: Korean journal of anesthesiology (2016)
Valsalva can be performed routinely in ASA I and II patients undergoing spinal anesthesia as it is safe, painless and non-pharmacological method of pain attenuation.