Radiographic angles in hallux valgus: Comparison between protractor and iPhone measurements

Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society
Hong-Zheng MengMao-Wei Yang

Abstract

Radiographic angles are used to assess the severity of hallux valgus deformity, make preoperative plans, evaluate outcomes after surgery, and compare results between different methods. Traditionally, hallux valgus angle (HVA) has been measured by using a protractor and a marker pen with hardcopy radiographs. The main objective of this study is to compare HVA measurements performed using a smartphone and a traditional protractor. The secondary objective was to compare the time taken between those two methods. Six observers measured major HVA on 20 radiographs of hallux valgus deformity with both a standard protractor and an Apple iPhone. Four of the observers repeated the measurements at least a week after the original measurements. The mean absolute difference between pairs of protractor and smartphone measurements was 3.2°. The 95% confidence intervals for intra-observer variability were ±3.1° for the smartphone measurement and ±3.2° for the protractor method. The 95% confidence intervals for inter-observer variability were ±9.1° for the smartphone measurement and ±9.6° for the protractor measurement. We conclude that the smartphone is equivalent to the protractor for the accuracy of HVA measurement. But, the time taken in sma...Continue Reading

References

Aug 1, 1990·Foot & Ankle·B J NestorA D Bergmann
Dec 1, 1994·Foot & Ankle International·C L SaltzmanI J Alexander
Jun 29, 2001·Foot & Ankle International·M J Coughlin, E Freund
Jul 15, 2003·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·J M Bland, D G Altman
Nov 30, 2004·Foot & Ankle International·Vinod K Panchbhavi, Saul Trevino
Mar 16, 2005·Foot & Ankle International·Daniel C FarberMaxwell W Steel
Sep 5, 2006·The Journal of Foot and Ankle Surgery : Official Publication of the American College of Foot and Ankle Surgeons·Michael A Schreck
Sep 14, 2010·The Journal of Foot and Ankle Surgery : Official Publication of the American College of Foot and Ankle Surgeons·Subodh SrivastavaTarek El Fakhri

❮ Previous
Next ❯

Citations

Jan 15, 2019·International Journal of Rehabilitation Research. Internationale Zeitschrift Für Rehabilitationsforschung. Revue Internationale De Recherches De Réadaptation·Luca LongoniGiorgio Ferriero
Aug 21, 2020·Foot & Ankle Specialist·Mohammadali KhademiAndrew Strydom

❮ Previous
Next ❯

Software Mentioned

Tiltmeter
Excel
Tiltmeter Pro

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society
Matthew ShawGeoffrey N Askin
The Journal of Foot and Ankle Surgery : Official Publication of the American College of Foot and Ankle Surgeons
Subodh SrivastavaTarek El Fakhri
© 2021 Meta ULC. All rights reserved