Evidence map›Paper›PMID 38795188›Full record

ArticleArchives of orthopaedic and trauma surgery2024

App-based analysis of the femoral tunnel position in ACL reconstruction using the quadrant method.

Maximilian M Mueller, Oliver Tenfelde, Nico Hinz, Geert Pagenstert, Karl-Heinz Frosch, Juergen Hoeher, Ralph Akoto

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In one paragraph

Article in Archives of orthopaedic and trauma surgery, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing 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

2 citing papers in PubMed.

  1. Standardizing ACL tunnel placement: an automated method for knee quadrant computation.International journal of computer assisted radiology and surgery · 2026
    Article
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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

7 authors.

Maximilian M MuellerDepartment of Trauma Surgery, Orthopaedics and Sports Traumatology, BG Klinikum Hamburg, Bergedorfer Strasse 10, 21033, Hamburg, Germany. maximilian.mueller@bgk-hamburg.de.ORCID http://orcid.org/0009-0008-6456-9518
Oliver TenfeldeDepartment of Orthopaedic Surgery, Trauma Surgery and Sports Medicine, Cologne Merheim Medical Center, University of Witten/Herdecke, Ostmerheimer Str. 200, 51109, Cologne, Germany.
Nico HinzDepartment of Trauma Surgery, Orthopaedics and Sports Traumatology, BG Klinikum Hamburg, Bergedorfer Strasse 10, 21033, Hamburg, Germany.
Geert PagenstertClarahof Clinic of Orthopaedic Surgery, University of Basel, Clarahofweg 19a, 4058, Basel, Switzerland.
Karl-Heinz FroschDepartment of Trauma Surgery, Orthopaedics and Sports Traumatology, BG Klinikum Hamburg, Bergedorfer Strasse 10, 21033, Hamburg, Germany.
Juergen HoeherDepartment of Orthopaedic Surgery, Trauma Surgery and Sports Medicine, Cologne Merheim Medical Center, University of Witten/Herdecke, Ostmerheimer Str. 200, 51109, Cologne, Germany.
Ralph AkotoDepartment of Trauma Surgery, Orthopaedics and Sports Traumatology, BG Klinikum Hamburg, Bergedorfer Strasse 10, 21033, Hamburg, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe purpose of this study was to examine the intra- and interobserver variability of an app-based analysis of the femoral tunnel position using the quadrant method in primary anterior cruciate ligament reconstruction. MATERIALS AND

methodsBetween 12/2020 und 12/2021 50 patients who underwent primary anterior cruciate ligament reconstruction were included in this retrospective study. Intraoperative strictly lateral fluoroscopic images of the knee with marked femoral tunnel were analyzed by four observers using the quadrant method. For retest reliability analysis, measurements were repeated once by 2 observers after 4 weeks.

resultsThe femoral tunnel position of all included patients averaged 27.86% in the depth relation and 15.61% in the height relation. Statistical analysis showed an almost perfect intra- and interobserver reliability in the depth and height relation. The ICC was 0.92 in the depth relation and 0.84 in the height relation. The Pearson's correlation coefficient in the depth and height relation of observer 1 (0.94/0.81) was only slightly different from the Pearson's correlation coefficient of observer 2 (0.92/0.85). The app-based tunnel analysis took on average 59 ± 16 s per measurement.

conclusionThe femoral tunnel analysis with the app-based quadrant method has an almost perfect intra- and interobserver reliability. By smartphone camera, a fast and highly accurate, if necessary also intraoperative, control of the tunnel position can be performed. LEVEL OF EVIDENCE: Level 3-diagnostic retrospective cohort study.

Indexed as

Anterior Cruciate Ligament ReconstructionFemurMobile ApplicationsAdolescentAdultAnterior Cruciate Ligament InjuriesFemaleFluoroscopyHumansMaleObserver VariationReproducibility of ResultsRetrospective StudiesSmartphoneYoung AdultACL reconstructionApp-basedBernard and HertelDigitalFemoral tunnel positionQuadrant method

Identifiers

PMID38795188

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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.