Evidence map›Paper›PMID 42233595›Full record

SynthesisKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2026

Substantial blood loss and transfusion burden after periacetabular osteotomy: Benchmark estimates from a systematic review and meta-analysis.

Nikolai Ramadanov, Jonathan Lettner, Roland Becker, Robert Prill, Marko Ostojic, Sufian S Ahmad

Abstract readSystematic ReviewMeta-Analysis
In one paragraph

Synthesis in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Nikolai RamadanovCenter of Orthopaedics and Traumatology, Brandenburg Medical School, University Hospital Brandenburg an der Havel, Brandenburg an der Havel, Germany.ORCID https://orcid.org/0000-0003-4669-8187
Jonathan LettnerCenter of Orthopaedics and Traumatology, Brandenburg Medical School, University Hospital Brandenburg an der Havel, Brandenburg an der Havel, Germany.
Roland BeckerCenter of Orthopaedics and Traumatology, Brandenburg Medical School, University Hospital Brandenburg an der Havel, Brandenburg an der Havel, Germany.
Robert PrillCenter of Orthopaedics and Traumatology, Brandenburg Medical School, University Hospital Brandenburg an der Havel, Brandenburg an der Havel, Germany.
Marko OstojicSports Traumatology Division, Traumatology Department "Draškovićeva", University Hospital "Sisters of Mercy", Zagreb, Croatia.
Sufian S AhmadDepartment of Orthopaedic Surgery, Hannover Medical School, Hannover, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo establish pooled benchmark estimates for perioperative blood loss and transfusion burden after periacetabular osteotomy (PAO) and to explore potential study-level moderators across the available literature.

methodsA systematic search of PubMed, Embase, Epistemonikos and CENTRAL was performed up to 30 March 2026. Prospective and retrospective primary clinical studies reporting at least one predefined perioperative blood management outcome after PAO were included. Outcomes comprised transfusion rate, units transfused, intraoperative blood loss, estimated blood loss, haemoglobin drop and postoperative haemoglobin levels. Random-effects meta-analyses of proportions and means were performed. Univariable meta-regression was used to explore study-level moderators.

resultsForty-seven studies comprising 4402 patients and 4767 hips were included. The pooled transfusion rate was 16.2% (95% confidence interval [CI] = 11.1-23.0), and the pooled mean number of transfused units was 1.94 (95% CI = 1.32-2.55). The pooled mean intraoperative blood loss was 961.8 mL (95% CI = 804.1-1119.5), and the pooled mean estimated blood loss was 809.9 mL (95% CI = 706.4-913.5). The pooled mean haemoglobin drop was 32.4 g/L (95% CI = 27.7-37.1), and the pooled mean postoperative haemoglobin level was 99.4 g/L (95% CI = 97.2-101.6). Longer operative time was significantly associated with higher intraoperative and estimated blood loss. Higher preoperative haemoglobin was associated with greater haemoglobin drop, while higher age was associated with transfusion-related outcomes.

conclusionPAO is associated with substantial perioperative blood loss and a relevant transfusion burden. These pooled estimates provide clinically useful benchmark values for perioperative blood management after PAO. LEVEL OF EVIDENCE: Level III systematic review and meta-analysis of predominantly retrospective cohort studies.

Indexed as

AcetabulumBlood Loss, SurgicalBlood TransfusionOsteotomyBenchmarkingHumansblood lossblood transfusionhip dysplasiameta‐analysisperiacetabular osteotomyperioperative management

Identifiers

PMID42233595
PMCPMC13327451

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.