Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

774 questions · 787 findings · 58 reviews · Anaesthesia

No studies found 123 · 15.6%GRADE not reported 179 · 22.7%Very low 192 · 24.4%Low 188 · 23.9%Moderate 72 · 9.1%High 33 · 4.2%

Summary of findings ‐ Erector spinae plane block vs paravertebral block

Rates of block‐related adverse events · adults undergoing surgery with general anaesthesia

Summary of findings ‐ Erector spinae plane block probably leads to lower rates of block‐related adverse events compared with paravertebral block (moderate certainty).

1 finding from 1 review

Summary of findings ‐ Erector spinae plane block vs transversus abdominis plane block

Rates of block‐related adverse events · adults undergoing surgery with general anaesthesia

Summary of findings ‐ Erector spinae plane block showed no clear difference in rates of block‐related adverse events compared with transversus abdominis plane block (low certainty).

1 finding from 1 review

Bispectral index vs clinical signs

Occurrence of intraoperative awareness Time points of measure after surgery: 2 to 6 hours;12 hours; 1 day; 2 days; 3 days; 14 days; 30 days; or time point was not reported Measurement tools: simple questioning; interviews; or structured questionna... · adults undergoing surgery with general anaesthesia

Bispectral index may leads to lower occurrence of intraoperative awareness Time points of measure after… compared with clinical signs (low certainty).

1 finding from 1 review

Bispectral index vs ETAG

Occurrence of intraoperative awareness Time points of measure after surgery: 2 to 6 hours;12 hours; 1 day; 2 days; 3 days; 14 days; 30 days; or time point was not reported Measurement tools: simple questioning; interviews; or structured questionna... · adults undergoing surgery with general anaesthesia

BIS showed no clear difference in occurrence of intraoperative awareness Time points of measure after… compared with ETAG (low certainty).

1 finding from 1 review

Ultrasound guidance vs no ultrasound

Failed blocks · children (≤ 18 years of age) undergoing any type of surgical procedure (open or laparoscopic) for which a neuraxial (spinal, epidural,…

Ultrasound guidance showed no clear difference in failed blocks compared with no ultrasound guidance (moderate certainty).

1 finding from 1 review

Ultrasound guidance vs no ultrasound

Minor complications (3 to 6 weeks · children (≤ 18 years of age) undergoing any type of surgical procedure (open or laparoscopic) for which a neuraxial (spinal, epidural,…

Ultrasound guidance showed no clear difference in minor complications compared with no ultrasound guidance (low certainty).

1 finding from 1 review

Ultrasound guidance vs no ultrasound

Major complications · children (≤ 18 years of age) undergoing any type of surgical procedure (open or laparoscopic) for which a neuraxial (spinal, epidural,…

Ultrasound guidance showed no clear difference in major complications compared with no ultrasound guidance (moderate certainty).

1 finding from 1 review

Supplemental IV crystalloid vs control IV crystalloid volume

Nausea · participants aged 6 months or older undergoing surgical procedures under general anaesthesia

Supplemental IV crystalloid probably leads to lower risk of PON, defined as the presence of subjective nausea, reported… compared with control IV crystalloid volume (moderate certainty).

1 finding from 1 review