Evidence map›Paper›PMID 22903286›Full record

Trial reportClinical orthopaedics and related research2012

Does minimally invasive total knee arthroplasty improve isokinetic torque?

Michael C Liebensteiner, Martin Krismer, Arnold Koller, Barbara Semenitz, Eckart Mayr

Abstract readClinical Trial
In one paragraph

Trial report in Clinical orthopaedics and related research, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 3 pooled it
–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

9 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Post-operative limb position can influence blood loss and range of motion after total knee arthroplasty: a systematic review.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2015
    Pooled it
  4. Trial
  5. Effect of different postoperative flexion regimes on the outcomes of total knee arthroplasty: randomized controlled trial.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2017
    Trial
  6. Better outcomes after mini-subvastus approach for primary total knee arthroplasty: a Bayesian network meta-analysis.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2020
    Review
  7. Article
  8. Article
  9. Mini-midvastus total knee arthroplasty does not result in superior gait pattern.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2015
    Article
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

5 authors.

Michael C LiebensteinerDepartment of Orthopaedic Surgery, Innsbruck Medical University, Anichstrasse 35, 6020 Innsbruck, Austria. michael.liebensteiner@i-med.ac.at
Martin Krismer
Arnold Koller
Barbara Semenitz
Eckart Mayr

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundLess invasive dissection of the extensor apparatus, one of the aspects of minimally invasive surgical (MIS) TKA, might result in less reduction of postoperative quadriceps strength. However, it is unclear whether MIS is associated with less strength reduction. QUESTIONS/PURPOSES: We asked whether knee strength (extensor or flexor torque) would be greater in patients having a MIS TKA compared with patients having a standard TKA and whether knee scores, alignment, ROM, tourniquet and operating times, and hospital length of stay were improved.

methodsWe prospectively recruited 52 patients awaiting MIS or standard TKA, matched for age, weight, height, BMI, sex, and surgically treated side, but not randomized. Isokinetic tests were performed preoperatively and postoperatively to obtain peak values of extensor and flexor torque. Postoperative-to-preoperative ratios and the extensor-flexor torque ratio also were calculated.

resultsMean baseline extensor torques were 57 Nm and 53 Nm for MIS and standard TKAs, respectively. At 8 weeks postoperatively, absolute values of the mean postoperative knee extensor torque also were similar: 47 and 45 Nm for patients with MIS and standard TKAs, respectively. The postoperative-to-preoperative ratios were 0.8 for extensor and flexor torque in both groups. The extensor-flexor torque ratios were similar between groups.

conclusionsOur data suggest a less invasive dissection of the extensor apparatus involved in MIS TKA does not enhance postoperative quadriceps strength. LEVEL OF EVIDENCE: Level III, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.

Indexed as

Arthroplasty, Replacement, KneeMinimally Invasive Surgical ProceduresTorqueAgedBiomechanical PhenomenaFemaleHumansJoint DiseasesKnee JointMaleMiddle Aged

Identifiers

PMID22903286
PMCPMC3462860

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.