Direct estimation using calibrated drapes vs indirect estimation using gravimetric technique: Maternal blood loss of 500 mL or greater
Direct measurement using calibrated drapes leads to higher blood loss ≥ 500 mL compared with indirect estimation using gravimetric technique (high certainty).
What each review found
Current versions only| Finding | Effect | Studies | GRADE certainty |
|---|---|---|---|
Direct measurement using calibrated drapes vs indirect estimation using gravimetric technique Blood loss ≥ 500 mL · women undergoing vaginal birth Direct measurement using calibrated drapes leads to higher blood loss ≥ 500 mL compared with indirect estimation using gravimetric technique (high certainty). Methods for blood loss estimation after vaginal birth (2018) · Cochrane Headline outcomes only | RR 1.86 [1.11, 3.11] | 1 study · 900 participants | High |
Findings are shown side by side, never pooled across reviews.
The reviews
| Review | Searched up to | Included studies | AMSTAR 2 |
|---|---|---|---|
| Methods for blood loss estimation after vaginal birth 2018 · Cochrane Headline outcomes only | Not reported | list not extracted yet | Not assessed |
Studies behind the findings
None of these reviews ties its included studies to this outcome in the data here. Cochrane reviews and reviews with headline outcomes only do not list their studies yet.
How reviews are matched to this question
Reviews word the same question differently. Four decision models (TypeSafe's Jev, Liquid AI's d1-ultra, SubQ Snap and Baseten's Elephant) judged each wording of the population, intervention, comparator and outcome against the others; two wordings count as the same when at least three of them agree and none clearly disagrees, and findings count as this question only when all four elements match. Timing, setting and subgroup never split a question: they are shown on each finding.