Evidence map›Paper›PMID 37592159›Full record

ArticleArchives of orthopaedic and trauma surgery2023

Digital measurement of anterolateral knee laxity using strain sensors.

Hermann O Mayr, Nikolaus Rosenstiel, Karthika S Prakash, Laura M Comella, Peter Woias, Hagen Schmal, Michael Seidenstuecker

Abstract read
In one paragraph

Article in Archives of orthopaedic and trauma surgery, 2023. 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. 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.

Hermann O MayrDepartment of Orthopedic and Trauma Surgery, Faculty of Medicine, Medical Center-University of Freiburg, Hugstetter Straße 55, 79106, Freiburg, Germany. hermann.mayr@uniklinik-freiburg.de.ORCID http://orcid.org/0000-0002-5100-0372
Nikolaus RosenstielDepartment of Orthopedic and Trauma Surgery, Faculty of Medicine, Medical Center-University of Freiburg, Hugstetter Straße 55, 79106, Freiburg, Germany.ORCID http://orcid.org/0000-0001-6883-5854
Karthika S PrakashDepartment of Microsystems Engineering IMTEK, Albert-Ludwigs-University of Freiburg, Georges-Koehler-Allee 103, 79110, Freiburg, Germany.ORCID http://orcid.org/0000-0002-3279-9713
Laura M ComellaDepartment of Microsystems Engineering IMTEK, Albert-Ludwigs-University of Freiburg, Georges-Koehler-Allee 103, 79110, Freiburg, Germany.ORCID http://orcid.org/0000-0001-8283-1454
Peter WoiasDepartment of Microsystems Engineering IMTEK, Albert-Ludwigs-University of Freiburg, Georges-Koehler-Allee 103, 79110, Freiburg, Germany.ORCID http://orcid.org/0000-0002-4715-6032
Hagen SchmalDepartment of Orthopedic and Trauma Surgery, Faculty of Medicine, Medical Center-University of Freiburg, Hugstetter Straße 55, 79106, Freiburg, Germany.ORCID http://orcid.org/0000-0002-8801-2385
Michael SeidenstueckerG.E.R.N. Center of Tissue Replacement, Regeneration & Neogenesis, Department of Orthopedics and Trauma Surgery, Faculty of Medicine, Medical Center-University of Freiburg, Albert-Ludwigs-University of Freiburg, Hugstetter Straße 55, 79106, Freiburg, Germany.ORCID http://orcid.org/0000-0001-6643-6358

Funding

Deutsche Forschungsgemeinschaft 222567169
6 · The paper itself

Abstract

purposeThe ambition of the research group was to develop a sensor-based system that allowed the transfer of results with strain sensors applied to the knee joint. This system was to be validated in comparison to the current static mechanical measurement system. For this purpose, the internal rotation laxity of the knee joint was measured, as it is relevant for anterolateral knee laxity and anterior cruciate ligament (ACL) injury.

methodsThis is a noninvasive measurement method using strain sensors which are applied to the skin in the course of the anterolateral ligament. The subjects were placed in supine position. First the left and then the right leg were clinically examined sequentially and documented by means of an examination form. 11 subjects aged 21 to 45 years, 5 women and 6 men were examined. Internal rotation of the lower leg was performed with a torque of 2 Nm at a knee flexion angle of 30°.

resultsComparison of correlation between length change and internal knee rotation angle showed a strong positive correlation (r = 1, p < 0.01). Whereas females showed a significant higher laxity vs. males (p = 0.003).

conclusionsThe present study showed that the capacitive strain sensors can be used for reproducible measurement of anterolateral knee laxity. In contrast to the previous static systems, a dynamic measurement will be possible by this method in the future.

Indexed as

Anterior Cruciate Ligament InjuriesJoint InstabilityBiomechanical PhenomenaCadaverFemaleHumansKnee JointMaleRange of Motion, ArticularAnterolateral knee laxityDigital measurementMeasurement knee rotationRotational laxity kneeStrain sensors

Identifiers

PMID37592159
PMCPMC10542724

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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.