Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

567 questions · 573 findings · 37 reviews · Headline outcomes only

No studies found 89 · 15.5%GRADE not reported 156 · 27.2%Very low 140 · 24.4%Low 127 · 22.2%Moderate 47 · 8.2%High 14 · 2.4%

Lidocaine IV vs placebo or no treatment

Nausea · adults undergoing surgery with general anaesthesia

It is very uncertain whether intravenous (IV) lidocaine changes postoperative nausea, 'overall' (0 to 24 h, to 48 h, to 72 h) compared with placebo or no treatment (very low certainty).

1 finding from 1 review

Intervention not reported

Postoperative delirium (POD) within 7 days (As assessed by any method such as the Mini‐Mental State Examination (MMSE) and Confusion Assessment Method (CAM) in the first week after operation) · adults aged 18 years or over undergoing general anaesthesia for non‐cardiac or non‐neurosurgical elective operations

The intervention probably leads to lower postoperative delirium (POD) within 7 days (As assessed by any… (moderate certainty).

1 finding from 1 review

Intervention not reported

Postoperative cognitive dysfunction (POCD) (As determined by any method of assessing POCD including a battery of neuropsychological tests according to the criteria described by the International Study of Postoperative Cognitive Dysfunction (ISPOCD)) · adults aged 18 years or over undergoing general anaesthesia for non‐cardiac or non‐neurosurgical elective operations

The intervention showed no clear difference in postoperative cognitive dysfunction (POCD) (As determined by any… (moderate certainty).

1 finding from 1 review

Intervention not reported

Any postoperative complication · adults aged 18 years or over undergoing general anaesthesia for non‐cardiac or non‐neurosurgical elective operations

The intervention probably leads to lower any postoperative complication (moderate certainty).

1 finding from 1 review

CHRONIC: ACEi or ARB vs placebo

All‐cause mortality · Patients undergoing any type of surgery under general anaesthesia receiving ACEIs or ARBs perioperatively

It is very uncertain whether ACEIs or ARBs changes all‐cause mortality compared with placebo (very low certainty).

1 finding from 1 review

CHRONIC: ACEi or ARB vs placebo

Risk of acute myocardial ischaemia · Patients undergoing any type of surgery under general anaesthesia receiving ACEIs or ARBs perioperatively

It is very uncertain whether ACEIs or ARBs changes risk of acute myocardial ischaemia compared with placebo (very low certainty).

1 finding from 1 review

CHRONIC: ACEi or ARB vs placebo

Rate of perioperative cerebrovascular complications · Patients undergoing any type of surgery under general anaesthesia receiving ACEIs or ARBs perioperatively

It is very uncertain whether ACEIs or ARBs changes rate of perioperative cerebrovascular complications compared with placebo (very low certainty).

1 finding from 1 review