Anesthesiology
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Randomized Controlled Trial
Effects of Serratus Anterior Plane Block on Early Recovery from Thoracoscopic Lung Resection: A Randomized, Blinded, Placebo-Controlled Trial.
The efficacy of serratus anterior plane block for treatment of pain after minimally invasive thoracic surgery remains unclear. This trial assesses the impact of serratus anterior plane block on postoperative opioid consumption and on measures of early recovery after thoracoscopic lung resection. ⋯ The protocol-specified intention-to-treat analysis demonstrated that serratus anterior plane block did not result in a significant reduction in opioid consumption when added to a multimodal analgesic regimen after thoracoscopic anatomic lung resection. The sensitivity as-treated analysis showed a significant and modest clinical reduction in the primary outcome that warrants further investigation.
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Randomized Controlled Trial Comparative Study
Paravertebral versus Pectoralis-II (Interpectoral and Pectoserratus) Nerve Blocks for Postoperative Analgesia after Non-Mastectomy Breast Surgery: A Randomized, Controlled, Observer-Masked Noninferiority Trial.
Pectoralis-II and paravertebral nerve blocks are both used to treat pain after breast surgery. Most previous studies involving mastectomy identified little difference of significance between the two approaches. Whether this is also accurate for nonmastectomy procedures remains unknown. ⋯ After nonmastectomy breast surgery, two-level paravertebral blocks provided superior analgesia and opioid sparing compared with pectoralis-II blocks. This is a contrary finding to the majority of studies in patients having mastectomy, in which little significant difference was identified between the two types of blocks.
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Comparative Study
Mechanical power in decelerating flow versus square flow ventilation in pediatric ARDS.
Mechanical power is a summary variable quantifying the risk of ventilator-induced lung injury. The original mechanical power equation was developed using square flow ventilation. However, most children are ventilated using decelerating flow. It is unclear whether mechanical power differs according to mode of flow delivery. This study compared mechanical power in children with acute respiratory distress syndrome who received both square and decelerating flow ventilation. ⋯ Mechanical power was marginally lower in square flow than in decelerating flow, although the clinical significance of this is unclear. Upward of 30% of mechanical power may go toward overcoming resistance, regardless of age. This is nearly three-fold greater resistance compared to what has been reported in adults.