Trial reportJournal of orthopaedic surgery and research2015
Effects of knee position on blood loss following total knee arthroplasty: a randomized, controlled study.
Trial report in Journal of orthopaedic surgery and research, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 2 of them syntheses that pooled it.
What it found
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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.
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.
Who cites it
8 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- An updated meta-analysis evaluating limb management after total knee arthroplasty-what is the optimal method?Journal of orthopaedic surgery and research · 2019Pooled it
- Impact of flexion versus extension of knee position on outcomes after total knee arthroplasty: a meta-analysis.Archives of orthopaedic and trauma surgery · 2017Pooled it
- Reduction of Blood Loss by Intra-articular Injection of Tranexamic Acid Combined with Knee and Hip Flexion at 45° During Primary Total Knee Arthroplasty: A Randomized Controlled Trial.Orthopaedic surgery · 2020Trial
- Effects of sealing the intramedullary femoral canal in total knee arthroplasty: A randomized study.Medicine · 2017Trial
- Enhancing bleeding control in total knee arthroplasty for osteoarthritis and rheumatic diseases: strategies and insights.Reumatologia · 2025Review
- [The influence of knee flexion position on postoperative blood loss and knee range of motion after total knee arthroplasty].Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 2020Review
- Tranexamic Acid Reduces Total Blood Loss and Inflammatory Response in Computer-Assisted Navigation Total Knee Arthroplasty.BioMed research international · 2019Article
- Perioperative Blood Management Strategies for Total Knee Arthroplasty.Orthopaedic surgery · 2018Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveBlood loss following total knee arthroplasty is a serious side-effect of surgery and impacts on patient recovery and quality of life. The aim of this study was to assess the effect of postoperative knee position during recovery on blood loss and range of motion.
methodsOne hundred consecutive patients, with stage III or IV degenerative osteoarthritis, were enrolled in the study and randomized equally between two treatment groups: flexion and extension. In the flexion group, the affected leg was elevated postoperatively by 45° at the hip, with 45° flexion at the knee, while patients in the extension group had the knee extended fully. Blood loss, pre- and postoperative hemoglobin levels, and range of motion were recorded together with duration of hospital stay and complications.
resultsCalculated blood loss, hidden blood loss, and postoperative hemoglobin levels between the two groups were significantly different, with patients in the flexion group experiencing lower blood loss than those in the extension group (P < 0.05). After 6-week rehabilitation, patients from both groups attained a similar range of motion in the joint. Duration of hospital stay was shorter in the flexion group by 1.6 days. Wound infection rates were similar in both groups, and we observed no proven deep vein thrombosis.
conclusionsPostoperative elevation of the hip by 45°, with 45° knee flexion, is an effective and simple method of reducing blood loss and hospital stay following unilateral primary total knee arthroplasty.
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