Evidence map›Paper›PMID 26510621›Full record

Trial reportBMC musculoskeletal disorders2015

Tourniquet induced ischemia and changes in metabolism during TKA: a randomized study using microdialysis.

Ashir Ejaz, Anders C Laursen, Andreas Kappel, Thomas Jakobsen, Poul Torben Nielsen, Sten Rasmussen

Open access · goldAbstract readRandomized Controlled Trial
In one paragraph

Trial report in BMC musculoskeletal disorders, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 3 pooled it
2.0field-weighted citation impact, top 15% of its field
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

14 citing papers in PubMed, 3 syntheses or guidelines pooled it, 34 citations in OpenAlex.

  1. Pooled it
  2. Tourniquet use for knee replacement surgery.The Cochrane database of systematic reviews · 2020
    Pooled it
  3. Pooled it
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  8. Observational
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  11. Review
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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 at 1 institution in 1 country.

Ashir EjazDepartment of Orthopedic Surgery, Aalborg University Hospital, Aalborg, Denmark. asej@rn.dk.
Anders C LaursenDepartment of Orthopedic Surgery, Aalborg University Hospital, Aalborg, Denmark.
Andreas KappelDepartment of Orthopedic Surgery, Aalborg University Hospital, Aalborg, Denmark.
Thomas JakobsenDepartment of Orthopedic Surgery, Aalborg University Hospital, Aalborg, Denmark.
Poul Torben NielsenDepartment of Orthopedic Surgery, Aalborg University Hospital, Aalborg, Denmark.
Sten RasmussenDepartment of Orthopedic Surgery, Aalborg University Hospital, Aalborg, Denmark.
Aalborg University Hospital · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundTourniquet use in total knee arthroplasty (TKA) surgery is applied to minimize blood loss thereby creating better overview of the surgical field. This induces ischemia in the skeletal muscle resulting in reperfusion injury. Our aim was to investigate the in vivo metabolic changes in the skeletal muscle during TKA surgery using microdialysis (MD).

methodsSeventy patients were randomly allocated to tourniquet group (n = 35) or non-tourniquet group (n = 35). Prior to surgery, catheters were inserted in the operated leg and non-operated leg. Interstitial dialysate was collected before and after surgery and at 20 min intervals during a 5 h reperfusion period. Main variables were ischemic metabolites: glucose, pyruvate, lactate and glycerol and L/P ratio.

resultsSignificant difference in all metabolites was detected between the two groups, caused by tourniquet application. Tourniquet induced ischemia resulted in decreased levels of glucose and pyruvate to 54 and 60 % respectively, compared to baseline. Simultaneously, accumulation of lactate to 116 % and glycerol to 190 % was observed. L/P ratio was elevated indicating ischemia. In the non-tourniquet group the metabolite changes were less profound and normalized within 60 min.

conclusionsMicrodialysis revealed that performing TKA with tourniquet is associated with increased ischemia. This affects all metabolites but the changes are normalized after 5 h.

Indexed as

Arthroplasty, Replacement, KneeAgedFemaleHumansIschemiaMaleMiddle AgedMuscle, SkeletalProspective StudiesTourniquets

Identifiers

PMID26510621
PMCPMC4625433
OpenAlexW2162630602

What OpenQuestion holds

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Registered trials

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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.