An analysis of Q angle with respect to various body parameters in athletes

The relationship between body height and body weight has been described by using various terms. Notable among them is the body mass index, body surface area, body shape index and body surface index. In clinical setting the first descriptive parameter is the BMI scale, which provides information about whether an individual body weight is proportionate to the body height. Since the development of BMI, two other body parameters have been developed in an attempt to determine the relationship between body height and weight. These are the body surface area (BSA) and body surface index (BSI). Generally, these body parameters are described as clinical health indicators that described how healthy an individual body response to the other internal organs. The aim of the study is to discuss the use of BSI as a better clinical health indicator for preclinical assessment of body-organ/tissue relationship. Hence organ health condition as against other body composition. In addition the study is `also to determine the best body parameter the best predict other parameters for clinical application. The model parameters are presented as; modeled height and weight; modelled BSI and BSA, BSI and BMI and modeled BSA and BMI. The models are presented as clinical application software for comfortable working process and designed as GUI and CAD for use in clinical application.

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Kinect Azure–Based Accurate Measurement of Dynamic Valgus Position of the Knee—A Corrigible Predisposing Factor of Osteoarthritis

Applied Sciences ◽

10.3390/app11125536 ◽

2021 ◽

Vol 11 (12) ◽

pp. 5536

Author(s):

Ádám Uhlár ◽

Mira Ambrus ◽

Márton Kékesi ◽

Eszter Fodor ◽

László Grand ◽

...

Keyword(s):

Motion Capture ◽

Optical System ◽

Lower Limb ◽

Cruciate Ligament ◽

Movement Pattern ◽

Recognition Algorithm ◽

Predisposing Factor ◽

Lower Limb Injury ◽

Q Angle ◽

Dynamic Valgus

(1) Dynamic knee valgus is a predisposing factor for anterior cruciate ligament rupture and osteoarthritis. The single-leg squat (SLS) test is a widely used movement pattern test in clinical practice that helps to assess the risk of lower-limb injury. We aimed to quantify the SLS test using a marker-less optical system. (2) Kinect validity and accuracy during SLS were established by marker-based OptiTrack and MVN Xsens motion capture systems. Then, 22 individuals with moderate knee symptoms during sports activities (Tegner > 4, Lysholm > 60) performed SLS, and this was recorded and analyzed with a Kinect Azure camera and the Dynaknee software. (3) An optical sensor coupled to an artificial-intelligence-based joint recognition algorithm gave a comparable result to traditional marker-based motion capture devices. The dynamic valgus sign quantified by the Q-angle at the lowest point of the squat is highly dependent on squat depth, which severely limits its comparability among subjects. In contrast, the medio-lateral shift of the knee midpoint at a fixed squat depth, expressed in the percentage of lower limb length, is more suitable to quantify dynamic valgus and compare values among individual patients. (4) The current study identified a new and reliable way of evaluating dynamic valgus of the knee joint by measuring the medial shift of the knee-over-foot at a standardized squat depth. Using a marker-less optical system widens the possibilities of evaluating lower limb functional instabilities for medical professionals.

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Allometric relationships between the length of pregnancy and body parameters in mammals

10.1063/1.4897887 ◽

2014 ◽

Author(s):

A. T. Atanasov ◽

M. Todorova ◽

D. T. Valev ◽

R. Todorova

Keyword(s):

Allometric Relationships ◽

Body Parameters

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Greater Q angle may not be a risk factor of Patellofemoral Pain Syndrome

Clinical Biomechanics ◽

10.1016/j.clinbiomech.2010.11.015 ◽

2011 ◽

Vol 26 (4) ◽

pp. 392-396 ◽

Cited By ~ 23

Author(s):

Sang-Kyoon Park ◽

Darren J. Stefanyshyn

Keyword(s):

Risk Factor ◽

Pain Syndrome ◽

Patellofemoral Pain Syndrome ◽

Patellofemoral Pain ◽

Q Angle

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Effect of Q-angle on patellar positioning and thickness of knee articular cartilages

Surgical and Radiologic Anatomy ◽

10.1007/s00276-010-0715-4 ◽

2010 ◽

Vol 33 (2) ◽

pp. 97-104 ◽

Cited By ~ 8

Author(s):

Aikaterini E. Tsakoniti ◽

Dimitris G. Mandalidis ◽

Spyros I. Athanasopoulos ◽

Christoforos A. Stoupis

Keyword(s):

Q Angle ◽

Articular Cartilages

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Response to letter to the editor “A reliable Q angle measurement using a standardized protocol”

The Knee ◽

10.1016/j.knee.2020.07.091 ◽

2020 ◽

Vol 27 (6) ◽

pp. 2023-2024

Author(s):

Alan C. Merchant

Keyword(s):

Angle Measurement ◽

Standardized Protocol ◽

Letter To The Editor ◽

Q Angle

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Frequencies of different phenotypes and body parameters of mature indigenous chicken in deciduous rainforest zone of Nigeria

Nigerian Journal of Animal Production ◽

10.51791/njap.v38i1.686 ◽

2021 ◽

Vol 38 (1) ◽

pp. 4-13

Author(s):

S. O. K. Fajemilehin

Keyword(s):

Phenotypic Expression ◽

Recessive Gene ◽

Sampling Technique ◽

The Body ◽

Capital City ◽

Indigenous Chicken ◽

Gene Frequencies ◽

Convenience Sampling ◽

Body Parameters ◽

Dominant Genes

The study was conducted using 800 adult local chickens comprising 355 males and 445 females, which were obtained from 2 major markets in Ado Ekiti, the capital city of Ekiti state, Nigeria. Convenience sampling technique was employed in selecting animals for observation. The birds were individually observed for phenotypic expression of shank colour, feather morphology, feather structure, polydactyly, ptylopody and comb types. The number in each group was expressed as a percentage of the total number of birds. The body size parameters measured include body weight, body girth, body length, shank length, wing length, toe length, keel length and shank diameter. The result revealed that the phenotypic frequencies of birds with dominant genes for feather morphology (FF, Ff), feather structure (NaNa + Nana), poly dactyl (PoPo + Popo) and ptylopods (FshFsh + Fshfsh) were 0.033, 0.037, 0.042 and 0.046 respectively, while that of the recessive gene carriers were 0.967, 0.963, 0.958 and 0.954 respectively. The calculated gene frequencies for frizzled (F), Naked neck (Na), Polydactyly (Po) and ptylopods (Fsh) were 0.035, 0.024, 0.034 and 0.035 respectively. The local chicken showed different plumage coloration with black, brown and pink predominating. The male birds were superior to their female counterparts with significant differences (P<0.05) in all the parameters measured except weight.

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Determination of the Relationship between Renal Volume Model and Related Body Indices for Clinical Application in Ghana

International Journal of Scientific Research in Science Engineering and Technology ◽

10.32628/ijsrset173169 ◽

2017 ◽

pp. 313-320

Author(s):

Issahaku Shirazu ◽

Y. B. Mensah ◽

Cyril Schandorf ◽

S. Y. Mensah

Keyword(s):

Clinical Application ◽

Body Height ◽

Reference Value ◽

Renal Volume ◽

Water Displacement ◽

Volume Model ◽

Measuring Machine ◽

And Gender ◽

Body Parameters ◽

The Relationship

The study was done to establish the relationship between measured renal volume and body parameters to estimate standard reference value of renal volume related body parameters (RV-BMI, RV-BSI and RV-BSA) in Ghana for clinical application. The estimates were done based on age and gender variation and compare the established standard reference renal volume with its related body parameters. The weight and BMI measuring machine together with tape measure and glass beaker were the measuring tools used. The procedure involve measurement of body height and weight and using the estimated values to calculate BMI with the BMI calculator. It also involve using DuBois formula to estimate local standard reference values of BSI and BSA in Ghana. The reference standard renal volume was determined using water displacement with the Archimedes' principle to confirm the established values in Ghana. These value were compare with established standard reference renal volume model in Ghana which were estimated using abdominal images on MeVisLab application software platform and determined the relationship between these parameters. The determined Ghanaian standard reference renal volume were: 146.74cm3, 151.76cm3, 142.04cm3 and 148.29cm3 for male and female, with its corresponding right and left kidneys respectively. The estimated mean BMI, BSI and BSA were; 25.19kg/m2 39.81 kg/m2 and 2.02m2 for male and 21.91kg/m2 36.58kg/m2 and 1.69m2 for female respectively. Hence from these set of values, the relationship between renal volume and its related BMI was determined to be 6.04cm3-kg/m2 for male and 6.47cm3-kg/m2 for female. While the male RV related-BSA was also determine to be 74.05cm3-m2 and 84.09cm3-m2 for female. Finally, the renal volume related-BSI was also estimated to be 3.81cm3-kg/m2 for male and 3.88cm3-kg/m2 for female. The standard reference renal volume related BMI, BSI and BSA are recommended to be used for renal assessment for clinical application in Ghana.

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Clinical rearfoot and knee static alignment measurements are not associated with patellofemoral pain syndrome

Fisioterapia e Pesquisa ◽

10.1590/s1809-29502012000100009 ◽

2012 ◽

Vol 19 (1) ◽

pp. 45-51 ◽

Cited By ~ 2

Author(s):

Sandra Aliberti ◽

Mariana Souza Xavier Costa ◽

Sílvia Maria Amado João ◽

Anice de Campos Pássaro ◽

Antonio Carlos Arnone ◽

...

Keyword(s):

Odds Ratio ◽

Pain Syndrome ◽

Patellofemoral Pain Syndrome ◽

Patellofemoral Pain ◽

Cross Sectional ◽

Q Angle ◽

Limited Applicability ◽

Mean Differences ◽

Continuous Measures ◽

Control Study

The aim of the present study was to investigate the association between the patellofemoral pain syndrome and the clinical static measurements: the rearfoot and the Q angles. The design was a cross-sectional, observational, case-control study. We evaluated 77 adults (both genders), 30 participants with patellofemoral pain syndrome, and 47 controls. We measured the rearfoot and Q angles by photogrammetry. Independent t-tests were used to compare outcome continuous measures between groups. Outcome continuous data were also transformed into categorical clinical classifications, in order to verify their statistical association with the dysfunction, and χ2 tests for multiple responses were used. There were no differences between groups for rearfoot angle [mean differences: 0.2º (95%CI -1.4-1.8)] and Q angle [mean differences: -0.3º (95%CI -3.0-2.4). No associations were found between increased rearfoot valgus [Odds Ratio: 1.29 (95%CI 0.51-3.25)], as well as increased Q angle [Odds Ratio: 0.77 (95%CI 0.31-1.93)] and the patellofemoral pain syndrome occurrence. Although widely used in clinical practice and theoretically thought, it cannot be affirmed that increased rearfoot valgus and increased Q angle, when statically measured in relaxed stance, are associated with patellofemoral pain syndrome (PFPS). These measures may have limited applicability in screening of the PFPS development.

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