An Ergonomic Testing System for the First Metatarsophalangeal Joint Stiffness

2018 ◽  
Vol 140 (10) ◽  
Author(s):  
Fatemeh Farhadi ◽  
Muhammad Faraz ◽  
Marabelle Heng ◽  
Shane Johnson
Keyword(s):  
Measurement Errors ◽  
Intraclass Correlation ◽  
Joint Stiffness ◽  
Metatarsophalangeal Joint ◽  
Testing System ◽  
Device Design ◽  
First Metatarsophalangeal Joint ◽  
Left And Right ◽  
The Mean ◽  
The Right

Osteoarthritis sufferers commonly have first metatarsophalangeal joint (MTPJ) problems in which articular surfaces are changed permanently due to fatigue. Therefore, medical devices for early diagnosis would increase the opportunity for prevention of disease progression. In previous studies on stiffness of the first MTPJ many details, although functionally of great importance, have not been fully considered including: design and size of the device, tribology consideration, and errors from device. Therefore, the motivation of our research was to enhance the device design by reducing the size of the device, and device design was enhanced by minimizing measurement errors through development of a new ergonomic left and right foot instrument located medial to the first MTPJ (instead of beneath the foot). The first MTPJ stiffness (N mm/kg radian) measurement was taken on 28 subjects with two replicates per subject by the same tester. The first MTPJ stiffness ranged from 3.49 to 14.42 N mm/kg radian with the mean (SD) value of 8.28 (3.15) N mm/kg radian for the left feet and 3.91 to 11.90 N mm/kg radian with the mean (SD) value of 7.65 (2.07) N mm/kg radian for the right feet. Reliability evaluation was measured using intraclass correlation coefficient and described an excellent reliability between two tests.

Arch Height Index Normative Values of College-Aged Women Using the Arch Height Index Measurement System

2013 ◽  
Vol 103 (3) ◽  
pp. 213-217 ◽  
Author(s):  
Wendi H. Weimar ◽  
Justin F. Shroyer
Keyword(s):  
Measurement System ◽  
Metatarsophalangeal Joint ◽  
Standing Position ◽  
Normative Values ◽  
Arch Height ◽  
First Metatarsophalangeal Joint ◽  
Index Measurement ◽  
Foot Arch ◽  
Left And Right ◽  
The Mean

Background: The arch height index measurement system (AHIMS) device has been found to be a reliable and valid instrument for measuring the arch height index (AHI) of the feet of individuals; however, normative data for the AHI are lacking for various populations. Therefore, the purposes of this study were to establish population normative AHI values for college-aged females and to compare the observed AHI data across right and left feet. Methods: Seventy-nine college-aged females served as study participants, and both feet were measured using the AHIMS in the seated and standing positions. The AHI was calculated as the ratio of the dorsum height of the foot at half the total foot length to the length of the foot from the heel to the base of the first metatarsophalangeal joint. Results: The mean ± SD AHI values for the left and right feet in the seated position were 0.355 ± 0.031 and 0.369 ± 0.034, respectively. The mean ± SD AHI values for the left and right feet in the standing position were 0.338 ± 0.031 and 0.343 ± 0.033, respectively. There were significant differences observed between the left and right feet for the seated (P < .001) and standing (P = .003) positions. Conclusions: Normative values were established for college-aged females for the AHI using the AHIMS. Differences were noted between the right and left feet of the participants sampled. Although normative values were obtained, we caution against using these values to classify foot arch types based solely on a sample of the population studied. (J Am Podiatr Med Assoc 103(3): 213–217, 2013)

Correlation analysis of the x-ray and functional parameters from the results of chevron (Austin) osteotomy for hallux valgus

2020 ◽  
pp. 54-63
Author(s):  
Ruslan Khairutdinov ◽  
Timur Minasov ◽  
Ekaterina Yakupova ◽  
Elvina Mukhametzyanova
Keyword(s):  
Hallux Valgus ◽  
Rating Scale ◽  
Metatarsophalangeal Joint ◽  
Valgus Deformity ◽  
First Metatarsophalangeal Joint ◽  
Chevron Osteotomy ◽  
Hallux Valgus Deformity ◽  
Valgus Angle ◽  
The Right ◽  
Bone Structures

Hallux valgus is characterized by the appearance and growth of a painful “lump” in the region of the first metatarsophalangeal joint, the development of forefoot corns, and inability to choose the right shoes, which leads to a significant decrease in the quality of life of these patients. Corrective osteotomies that preserve the metatarsophalangeal joint, for example Austin (Chevron) osteotomy, are usually used for hallux valgus deformity of the I, II degrees. Radiography with the study of the hallux valgus angle (HVA), the intermetatarsal angle (IMA), the distal metatarsal articular angle (DMAA) is a research method that shows the true correlation between bone structures. The correlation between the radiological and functional indicators of osteotomy allows us to determine possible recommendations for indications for surgical treatment of Hallux valgus. Correlation shows that the largest correction of hallux valgus in older patients occurs due to a small adjustment of the angle of DMMA and HVA. IMA had the best correction after Austin osteotomy among patients of a younger age, then the HVA, and the DMMA had minimum correction according to the AOFAS rating scale (Kitaoka). The revealed correlations allow us to determine the correct tactics for the treatment of hallux valgus by identifying the benefits of Austin osteotomy.

scholarly journals Distribution of bony erosions in feet and performance of two bone erosion scores: A dual-energy computed tomography study of 61 patients with gout

PLoS ONE ◽  
2021 ◽  
Vol 16 (11) ◽  
pp. e0259194
Author(s):  
Amandine Chabernaud Negrier ◽  
Lokmane Taihi ◽  
Eric Vicaut ◽  
Pascal Richette ◽  
Thomas Bardin ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Bone Erosion ◽  
Intraclass Correlation ◽  
Metatarsophalangeal Joint ◽  
Dual Energy ◽  
Radiology Department ◽  
Crystal Deposition ◽  
First Metatarsophalangeal Joint ◽  
Dual Energy Computed Tomography ◽  
Bone Erosions

Objectives To assess the distribution of bone erosions and two erosion scores in the feet of patients with gout and analyze the association between erosion scores and monosodium urate (MSU) crystal deposition using dual-energy computed tomography (DECT). Materials and methods We included all patients who underwent DECT of both feet between 2016 and 2019 in our radiology department, with positive detection of MSU deposits. Data on sex, age, treatment, serum urate, and DECT urate volumes were obtained. CT images were analyzed to score bone erosions in 31 sites per foot by using the semi-quantitative method based on the Rheumatoid Arthritis MRI Scoring (RAMRIS) system and the Dalbeth-simplified score. Reproducibility for the two scores was calculated with intraclass correlation coefficients (ICCs). Correlations between clinical features, erosion scores and urate crystal volume were analyzed by the Spearman correlation coefficient (r). Results We studied 61 patients (mean age 62.0 years); 3,751 bones were scored. The first metatarsophalangeal joint and the midfoot were the most involved in terms of frequency and severity of bone erosions. The distribution of bone erosions was not asymmetrical. The intra- and inter-observer reproducibility was similar for the RAMRIS and Dalbeth-simplified scores (ICC 0.93 vs 0.94 and 0.96 vs 0.90). DECT urate volume was significantly correlated with each of the two erosion scores (r = 0.58–0.63, p < 0.001). There was a high correlation between the two scores (r = 0.96, p < 0.001). Conclusions DECT demonstrates that foot erosions are not asymmetric in distribution and predominate at the first ray and midfoot. The two erosion scores are significantly correlated with DECT urate volume. An almost perfect correlation between the RAMRIS and Dalbeth-simplified scores is observed.

scholarly journals Treatment of hallux rigidus with percutaneous arthrodesis

2018 ◽  
Vol 12 (2) ◽  
pp. 90-95
Author(s):  
Vitor Baltazar Nogueira ◽  
Miguel Viana Pereira Filho ◽  
Mauro Cesar Mattos e Dinato ◽  
Márcio De Faria Freitas ◽  
Rodrigo Gonçalves Pagnano
Keyword(s):  
Medical Records ◽  
Case Series ◽  
Metatarsophalangeal Joint ◽  
Conventional Technique ◽  
Hallux Rigidus ◽  
Time Level ◽  
First Metatarsophalangeal Joint ◽  
The Mean ◽  
Pain Improvement ◽  
Consolidation Time

Objective: The objective of this study was to describe the percutaneous arthrodesis technique with single medial portal of the first metatarsophalangeal joint and to evaluate the results of a series of nine cases (10 feet) with a diagnosis of hallux rigidus subjected to this technique, comparing the results with literature data regarding the conventional technique. Methods: This was a retrospective, observational study performed by analysis of medical records and radiographs of nine patients undergoing percutaneous arthrodesis of the hallux metatarsophalangeal joint. Gender, age, consolidation time, level of postoperative pain and degree of patient satisfaction were evaluated. Results: Eight patients were female, and one patient was male. The mean age was 68.7 years, the mean consolidation time was 8 weeks, the consolidation ratio was 70%, there was pain improvement in the postoperative period, and all patients considered themselves satisfied with the surgery. Conclusion: Percutaneous arthrodesis of the metatarsophalangeal hallux joint potentially yields results similar to those of the conventional method demonstrated in the literature but uses smaller incisions.Level of Evidence IV, Therapeutic Studies, Case Series.

scholarly journals Using Smart Bracelets to Assess Heart Rate Among Students During Physical Education Lessons: Feasibility, Reliability, and Validity Study (Preprint)

2020 ◽  
Author(s):  
Jiangang Sun ◽  
Yang Liu
Keyword(s):  
Heart Rate ◽  
Physical Education ◽  
Intraclass Correlation ◽  
Reliability And Validity ◽  
Correlation Coefficients ◽  
Left Wrist ◽  
Intraclass Correlation Coefficients ◽  
Estimate Reliability ◽  
Left And Right ◽  
The Right

BACKGROUND An increasing number of wrist-worn wearables are being examined in the context of health care. However, studies of their use during physical education (PE) lessons remain scarce. OBJECTIVE We aim to examine the reliability and validity of the Fizzo Smart Bracelet (Fizzo) in measuring heart rate (HR) in the laboratory and during PE lessons. METHODS In Study 1, 11 healthy subjects (median age 22.0 years, IQR 3.75 years) twice completed a test that involved running on a treadmill at 6 km/h for 12 minutes and 12 km/h for 5 minutes. During the test, participants wore two Fizzo devices, one each on their left and right wrists, to measure their HR. At the same time, the Polar Team2 Pro (Polar), which is worn on the chest, was used as the standard. In Study 2, we went to 10 schools and measured the HR of 24 students (median age 14.0 years, IQR 2.0 years) during PE lessons. During the PE lessons, each student wore a Polar device on their chest and a Fizzo on their right wrist to measure HR data. At the end of the PE lessons, the students and their teachers completed a questionnaire where they assessed the feasibility of Fizzo. The measurements taken by the left wrist Fizzo and the right wrist Fizzo were compared to estimate reliability, while the Fizzo measurements were compared to the Polar measurements to estimate validity. To measure reliability, intraclass correlation coefficients (ICC), mean difference (MD), standard error of measurement (SEM), and mean absolute percentage errors (MAPE) were used. To measure validity, ICC, limits of agreement (LOA), and MAPE were calculated and Bland-Altman plots were constructed. Percentage values were used to estimate the feasibility of Fizzo. RESULTS The Fizzo showed excellent reliability and validity in the laboratory and moderate validity in a PE lesson setting. In Study 1, reliability was excellent (ICC&gt;0.97; MD&lt;0.7; SEM&lt;0.56; MAPE&lt;1.45%). The validity as determined by comparing the left wrist Fizzo and right wrist Fizzo was excellent (ICC&gt;0.98; MAPE&lt;1.85%). Bland-Altman plots showed a strong correlation between left wrist Fizzo measurements (bias=0.48, LOA=–3.94 to 4.89 beats per minute) and right wrist Fizzo measurements (bias=0.56, LOA=–4.60 to 5.72 beats per minute). In Study 2, the validity of the Fizzo was lower compared to that found in Study 1 but still moderate (ICC&gt;0.70; MAPE&lt;9.0%). The Fizzo showed broader LOA in the Bland-Altman plots during the PE lessons (bias=–2.60, LOA=–38.89 to 33.69 beats per minute). Most participants considered the Fizzo very comfortable and easy to put on. All teachers thought the Fizzo was helpful. CONCLUSIONS When participants ran on a treadmill in the laboratory, both left and right wrist Fizzo measurements were accurate. The validity of the Fizzo was lower in PE lessons but still reached a moderate level. The Fizzo is feasible for use during PE lessons.

scholarly journals The impact of functional excess of footwear on the foot shape of 7-year-old girls and boys

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11277
Author(s):  
Ewa Puszczalowska-Lizis ◽  
Aleksandra Lukasiewicz ◽  
Sabina Lizis ◽  
Jaroslaw Omorczyk
Keyword(s):  
Regression Analysis ◽  
Hallux Valgus ◽  
Metatarsophalangeal Joint ◽  
Rank Test ◽  
Chi Square ◽  
First Metatarsophalangeal Joint ◽  
Longitudinal Arch ◽  
Transverse Arch ◽  
The Right ◽  
The Impact

Background Properly fitted shoes can support the development of growing feet and prevent problems and pathologies, not only in childhood, but also in adulthood. This points to the need to conduct research on the impact of shoe fitting on the structure of the foot in order to raise awareness and importance of this problem, to enable proper decisions regarding the purchase and use of shoes. The aim of this study was to analyze indoor footwear fit and its impact on foot structure in 7-year-old schoolchildren. Methods The CQ-ST podoscope and the Clevermess device were used for measurements. The analysis was carried out using the Mann Whitney U test, Wilcoxon signed-rank test, Chi-square test, regression analysis. Results About 40% of girls and boys had shoes that were incorrectly fitted in length, while as many as 74% of girls and 66% of boys wore shoes that were incorrectly fitted in width. Regression analysis demonstrated a statistically significant influence of the footwear length on longitudinal arch of the right and left foot and the transverse arch of the right foot. In boys, the length of the shoes shows associations with the right and left hallux valgus angle. Conclusion A significant percentage of the studied 7-year-olds, regardless of gender, wears inappropriately fitted shoes. In both sexes, the length of the footwear influenced the longitudinal arch of the right and left foot and the transverse arch of the right foot. Due to the deformity of the first metatarsophalangeal joint, the boys with hallux valgus require footwear which is wider and therefore their shoes need to be bigger in size.

Reliability Study of Diagnostic Tests for Functional Hallux Limitus

2020 ◽  
Vol 41 (4) ◽  
pp. 457-462 ◽  
Author(s):  
Rubén Sánchez-Gómez ◽  
Ricardo Becerro-de-Bengoa-Vallejo ◽  
Marta Elena Losa-Iglesias ◽  
César Calvo-Lobo ◽  
Emmanuel Navarro-Flores ◽  
...  
Keyword(s):  
High Reliability ◽  
Intraclass Correlation ◽  
Metatarsophalangeal Joint ◽  
Signs And Symptoms ◽  
Metatarsal Head ◽  
Reliability Study ◽  
Level Of Evidence ◽  
First Metatarsophalangeal Joint ◽  
Limited Mobility ◽  
Hallux Limitus

Background: Functional hallux limitus (FHL) refers to dorsiflexion hallux mobility limitation when the first metatarsal head is under loading conditions but not in the unloaded state. The goal of the study was to evaluate 3 common manual tests (Buell, Dananberg, and Jack tests) for assessing first metatarsophalangeal joint (MPJ) mobility and determining the normal values needed to detect FHL, and clarify the signs and symptoms associated with this pathology. Methods: Forty-four subjects were included in this reliability study. Subjects were divided into healthy control (non-FHL) and FHL groups according to the Buell first MPJ limitation values in addition to signs and symptoms derived from the literature. In both groups, we measured the mobility in the Buell, Dananberg, and Jack tests using a goniometer; their intraclass correlation coefficients (ICCs), sensitivities, and specificity indexes were also calculated. Results: All techniques showed high reliability across measurement trials with ICCs ranging from 0.928 to 0.999. The optimal mobility grades for predicting FHL were 68.6 ± 3.7 degrees, 21 ± 5.9 degrees, and 25.5 ± 6.5 degrees (mean±SD) ( P < .05) for the Buell, Dananberg, and Jack tests, respectively. Conclusion: Normal and limited mobility values were established for assessing FHL using each technique. The sensitivity and specificity data were perfect for the Dananberg and Jack tests, thus identifying these tests as specific and valid tools for use in FHL diagnosis. Pinch callus was the sign most associated with FHL. Level of Evidence: Level II, comparative series.

Postnatal Development of a Left-Right Atrial Pressure Gradient

1956 ◽  
Vol 186 (3) ◽  
pp. 521-524 ◽  
Author(s):  
A. van Harreveld ◽  
F. E. Russell
Keyword(s):  
Left Ventricle ◽  
Pressure Gradient ◽  
Left Atrium ◽  
Postnatal Development ◽  
Right Atrial ◽  
Left And Right ◽  
The Mean ◽  
The Right ◽  
The Relationship ◽  
Equal Thickness

The mean left and right atrial pressures were measured in six groups of 10 kittens each. One group was examined between the 12th and 24th hour after birth, one group after 3 days, after 1 week, 2 weeks, 1 month and 2 months. The left and right atrial pressures were almost equal in the first group. With age an increasing left to right pressure gradient developed. In the oldest group the pressure in the left atrium was almost twice as great as in the right. Parallel with the pressure gradient a difference developed in the wall thicknesses of the left and right ventricles. At birth the ventricular walls were of about equal thickness; at age 2 months the left ventricle wall was more than twice as thick as the right. The relationship between ventricle wall thicknesses and atrial pressures is discussed.

scholarly journals Growth-Related Differences in Maximum Laterotrusion and Retrusion between Children and Adults

2009 ◽  
Vol 79 (2) ◽  
pp. 265-270 ◽  
Author(s):  
Claudia A. Reicheneder ◽  
Peter Proff ◽  
Uwe Baumert ◽  
Tomas Gedrange
Keyword(s):  
Temporomandibular Joint ◽  
Null Hypothesis ◽  
Population Based ◽  
Adult Group ◽  
Population Based Study ◽  
Significant Difference ◽  
Left And Right ◽  
The Mean ◽  
The Right

Abstract Objective: To test the null hypothesis that there are no differences between children and adults in maximum laterotrusion and maximum retrusion on the right and left sides. Materials and Methods: This population-based study included 81 randomly selected children between the ages of 6 and 10 years and 67 adults. Kinematic variables were measured with the ultrasonic JMA-System for registration. Results: The mean maximum laterotrusion of the children's group (10.6 ± 1.5 mm on the left, 11.0 ± 1.7 mm on the right) was significantly smaller than that of the adult group (11.7 ± 2.0 mm on the left, 12.2 ± 1.7 mm on the right). The maximum laterotrusion of the children's group corresponded to about 90% on the left and right sides of that of the adult group. The mean maximum retrusion of the children's group was significantly bigger than that of the adult group. There, the adult values corresponded to 66.7% on the left and 50% on the right side of the children's values. No significant difference in maximum laterotrusion and retrusion was noted on the right and left sides, and no significant differences according to gender specificities were observed in either group. Conclusions: The hypothesis is rejected. In development of the temporomandibular joint, maximum laterotrusion on the right and left sides increases significantly with age, and maximum retrusion decreases significantly with age.

scholarly journals TL 18237 - First metatarsophalangeal joint arthrodesis using a minimally invasive technique

2019 ◽  
Vol 13 (Supl 1) ◽  
pp. 112S
Author(s):  
Luiz Carlos Ribeiro Lara ◽  
Lúcio Carlos Torres ◽  
Gabriel Cervone ◽  
Juan Antonio Grajales ◽  
Fabio Lemos Rodrigues
Keyword(s):  
Minimally Invasive ◽  
Metatarsophalangeal Joint ◽  
Hallux Rigidus ◽  
Minimally Invasive Technique ◽  
Invasive Technique ◽  
Percutaneous Technique ◽  
First Metatarsophalangeal Joint ◽  
The Mean ◽  
Larger Sample

Introduction: Metatarsophalangeal joint arthrodesis (MTPA) is a surgical technique indicated for the treatment of hallux rigidus with advanced arthrosis and for rheumatic diseases. This classic surgery is widely used and effective; however, the use of a minimally invasive technique remains mostly unknown. Objective: To present the outcome of MTPA performed using a percutaneous technique. Methods: Hallux MTPA was performed in 8 feet from 4 patients with hallux rigidus and 4 with rheumatoid arthritis, with a higher prevalence of women than men (5 vs. 3) and a mean postoperative follow-up time of 1.5 years. The outcomes were evaluated using a modified version of the American Orthopedic Foot and Ankle Society (AOFAS) questionnaire and the union time. Results: All patients who underwent surgery showed improvements in pain and arthrodesis union at approximately 8 weeks. The mean AOFAS score increased to 85 points (of a total of 90 possible points). There were no complications, such as infection, nonunion or persistent pain. Conclusion: The percutaneous technique of hallux MTPA was effective, with satisfactory outcomes, reduced surgical invasiveness, immediate walking, rapid union with “arthrodesis take” and significant improvement in pain. However, a larger sample is required to confirm the outcomes.

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