Normal Values and Variation of Radiographic and CT Infant Lateral Iliac Wall Angles in Normal and Dysplastic Hips

Purpose Indices from 3-D ultrasound may have a role in developmental dysplasia of the hip (DDH) assessment, but require a way to determine spatial orientation relative to body axes. The lateral iliac wall angle is a potentially suitable reference axis in 3-D ultrasound. We sought to quantify normal values and variations of the infant iliac wall angle on radiography, and compare with computed tomography (CT). Methods Acetabular and lateral iliac angles were measured on frontal pelvic radiographs of 200 patients (400 hips, 183 with DDH) and coronal CT of 20 patients (40 hips) aged 0-12 months. Relationships among morphologic indices and demographics were assessed using linear regression, Welch's t-test, Pearson's correlation coefficient (r) and coefficients of variance (CoV). Reliability was assessed using intra-class correlation coefficients (ICC). Results The radiographic iliac angle averaged 53.0° ± 7.7° (mean ± standard deviation; 95% CI, 38°-68°) in DDH vs. 56.2° ± 6.7° (95% CI, 43°-69°) in normal hips (p<0.001), correlated weakly with age (r = 0.25), and showed no inter-sex differences (p = 0.79). Inter-reader and intra-reader reliability were ICC = 0.946 and 0.965. CT iliac angle had mean difference 5.8° ± 6.2° (p<0.01), CoV = 10% and r = 0.68 vs. corresponding radiographs. Conclusions The radiographic infant lateral iliac wall angle has mean value 53-56° in dysplastic and normal hips with consistent range of variation approximately ±15°, was measured with high reliability, does not differ by sex, and is only slightly lower in the youngest infants. The iliac wall angle is an unbiased reference axis that may be suitable to establish general spatial orientation of 3-D hip ultrasound images.

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Reliability and cross-cultural validity of the Bulgarian version of IRES-3

Folia Medica ◽

10.2478/v10153-010-0037-7 ◽

2011 ◽

Vol 53 (2) ◽

pp. 51-56

Author(s):

Desislava R. Bakova ◽

Nonka G. Mateva

Keyword(s):

Internal Consistency ◽

High Reliability ◽

Correlation Coefficients ◽

Mean Value ◽

Cross Cultural ◽

Alpha Coefficient ◽

Cultural Validity ◽

Rehabilitation Hospital ◽

The Mean ◽

Rehabilitation Status

Abstract Introduction: The IRES -3 questionnaire (Indicators of rehabilitation status, version 3) was developed to evaluate the rehabilitation effect in patients with psychosomatic, cardiac, orthopedic, oncologic, neurologic, gastroenterological and other disorders. Aim: The aim of the present study was to validate the Bulgarian version of IRES-3 and assess its reliability and internal consistency. Materials and methods: Validation of the IRES-3 questionnaire was carried out at the Specialized Rehabilitation Hospital, the National Complex PLtd, the Hisar branch. The study included 46 patients: 14 males (30.43%) and 32 females (69.57%). Patients’ age ranged between 43 and 75 years (mean age 63.52 ± 1.27). All participants got preliminary instructions and after that, within a period of one week, they completed the questionnaire two times. To evaluate IRES-3 reliability we used the split-half-reliability model and calculated the Spearman-Brown coefficients (rsb) for each of the scales. Internal consistency was estimated using Cronbach’s alpha coefficient. We used the mean value of the inter-item correlation coefficients as well. Results: The high values of rsb and Cronbach’s coefficient alpha as well as the low values of the inter-item correlation coefficient which were obtained in our study demonstrate that the questionnaire under investigation is of high reliability and internal consistency. Our results are very similar to the results of the original German questionnaire which have been reported in literature. Conclusion: The Bulgarian version of the IRES-3 questionnaire shows high reliability and cross-cultural validity and can be applied widely for evaluation of the effect of rehabilitation.

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Is there a relationship between the overhead press and split jerk maximum performance? Influence of sex

International Journal of Sports Science & Coaching ◽

10.1177/17479541211020452 ◽

2021 ◽

pp. 174795412110204

Author(s):

Marcos A Soriano ◽

G Gregory Haff ◽

Paul Comfort ◽

Francisco J Amaro-Gahete ◽

Antonio Torres-González ◽

...

Keyword(s):

Confidence Intervals ◽

Body Mass ◽

Upper Limb ◽

High Reliability ◽

Intraclass Correlation ◽

Correlation Coefficients ◽

Training Experience ◽

Maximum Performance ◽

Repetition Maximum ◽

Intraclass Correlation Coefficients

The aims of this study were to (I) determine the differences and relationship between the overhead press and split jerk performance in athletes involved in weightlifting training, and (II) explore the magnitude of these differences in one-repetition maximum (1RM) performances between sexes. Sixty-one men (age: 30.4 ± 6.7 years; height: 1.8 ± 0.5 m; body mass 82.5 ± 8.5 kg; weightlifting training experience: 3.7 ± 3.5 yrs) and 21 women (age: 29.5 ± 5.2 yrs; height: 1.7 ± 0.5 m; body mass: 62.6 ± 5.7 kg; weightlifting training experience: 3.0 ± 1.5 yrs) participated. The 1RM performance of the overhead press and split jerk were assessed for all participants, with the overhead press assessed on two occasions to determine between-session reliability. The intraclass correlation coefficients (ICC) and 95% confidence intervals showed a high reliability for the overhead press ICC = 0.98 (0.97 – 0.99). A very strong correlation and significant differences were found between the overhead press and split jerk 1RM performances for all participants (r = 0.90 [0.93 – 0.85], 60.2 ± 18.3 kg, 95.7 ± 29.3 kg, p ≤ 0.001). Men demonstrated stronger correlations between the overhead press and split jerk 1RM performances (r = 0.83 [0.73-0.90], p ≤ 0.001) compared with women (r = 0.56 [0.17-0.80], p = 0.008). These results provide evidence that 1RM performance of the overhead press and split jerk performance are highly related, highlighting the importance of upper-limb strength in the split jerk maximum performance.

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The potential role of the Alsberg angle as a predictor of lateral growth disturbance of the capital femoral epiphysis in children with developmental dysplasia of the hip treated by closed reduction

Journal of Children s Orthopaedics ◽

10.1302/1863-2548.14.190158 ◽

2020 ◽

Vol 14 (2) ◽

pp. 106-111 ◽

Cited By ~ 1

Author(s):

Ronghua Gui ◽

Federico Canavese ◽

Shuang Liu ◽

Lianyong Li ◽

Lijun Zhang ◽

...

Keyword(s):

Closed Reduction ◽

Normal Values ◽

Developmental Dysplasia ◽

Lateral Growth ◽

Growth Disturbance ◽

Level Of Evidence ◽

Normal Children ◽

One Year ◽

Dysplasia Of The Hip

Purpose Early diagnosis and prevention of lateral growth disturbance of the capital femoral epiphysis is challenging after treatment for developmental dysplasia of the hip (DDH). The aim of the study was to evaluate the radiographic changes of the Alsberg angle (AA) in normal children and those with DDH, and to assess the role of AA as a potential predictor of lateral growth disturbance of the capital femoral epiphysis. Methods AA was measured on the anterior-posterior pelvic radiographs of 1000 normal children ranging in age from one to ten years and in 66 children (92 hips) with DDH treated by closed reduction (CR). A comparative analysis was performed. Results In the normal children, mean AA decreased linearly with age, from 76° at age one year to 65° at age ten years, irrespective of gender and laterality. In children with DDH, the average AA was 81.5°(sd 3.9°; 74° to 87°) prior to CR; it was 75.9° (sd 4.5°; 68° to 83°) in normal children of the same age (p < 0.001). Among the 42 children (64 hips) with successfully and uneventfully treated DDH, AA reached normal values between the ages of five and six years. In contrast, children with lateral growth disturbance of the proximal femur physis (24 children, 28 hips) showed significantly higher AA values in comparison with the age-matched controls. Conclusion In DDH patients with successful CR, AA could be expected to match normal values in children between the ages of five and six years. On the other hand, AA can be used as an early predictor for lateral growth disturbance of the capital femoral epiphysis. Level of Evidence Level III

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Diagnostics of Advanced Power Intensive Power Sources Based on the Acoustic Spectroscopy Method

Herald of the Bauman Moscow State Technical University Series Natural Sciences ◽

10.18698/1812-3368-2021-6-121-127 ◽

2021 ◽

pp. 121-127

Author(s):

E.M. Petrenko ◽

V.A. Semenova

Keyword(s):

High Reliability ◽

Methodological Approach ◽

Spectral Characteristics ◽

Experimental Studies ◽

Mechanical Action ◽

Mean Value ◽

Spectroscopy Method ◽

Power Sources ◽

Acoustic Spectroscopy ◽

Noise Diagnostics

Objective of this article is to develop a method for lithium chemical current sources diagnostics, which would ensure high reliability in assessing their technical state (primarily, the discharge degree) close to potentially achievable introduction of the acoustic spectroscopy method. Today, microcalorimetric studies and methods of impedance and noise spectroscopy make it possible to predict the lithium chemical current sources service life. However, implementation of the microcalorimetric studies result requires a lot of time accompanied by using stationary and large-size equipment, which is practically impossible in the autonomous conditions. Application of the impedance spectroscopy method provides satisfactory results only with high degrees of discharge. In the range of 0--30 %, it is very difficult to determine the discharge degree, since noticeable alteration in the correlate within its deviation from the mean value is missing. In this regard, it is proposed in order to provide diagnostics of the lithium chemical current sources in the region of initial degrees of discharge to introduce the noise diagnostics method. In order to increase reliability of the diagnostic estimates, it is advisable to use acoustic spectroscopy as a physically independent method in diagnosing the state of lithium chemical current sources. Results of the preliminary measurements analysis confirm the prospects of using the acoustic spectroscopy method in assessing the current state of primary lithium chemical current sources. Experimental studies of the lithium chemical current sources response to acoustic (mechanical) action made it possible to determine a set of parameters characterizing the proposed methodological approach. This provided a possibility to search for correlation dependences of the lithium chemical current sources spectral characteristics on the degree of their discharge. This makes it possible to use the method of acoustic spectroscopy in prompt and reliable diagnostics of the primary current sources in the region of low discharge degrees

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Ultrasound-Guided Percutaneous Release Procedures in the Lumbar Ligamentum Flavum by Acupotomy: A Cadaveric study

Evidence-based Complementary and Alternative Medicine ◽

10.1155/2019/2807901 ◽

2019 ◽

Vol 2019 ◽

pp. 1-9

Author(s):

Xinyue Zhu ◽

Yifeng Shen ◽

Zixiang Liu ◽

Peiliang Gu ◽

Shiliang Li ◽

...

Keyword(s):

Ultrasound Guidance ◽

Ligamentum Flavum ◽

Spinous Process ◽

Correlation Coefficients ◽

Longitudinal Axis ◽

Ultrasound Images ◽

Ultrasound Guided ◽

Transverse Axis ◽

Needle Penetration ◽

Percutaneous Release

Objective. This study aims to determine the methods of percutaneous release procedures in the lumbar ligamentum flavum (LF) under ultrasound guidance by acupotomy and provide an anatomical basis for intrusive treatment of lumbar disc herniation and lumbar spinal canal stenosis. Methods. Twelve cadavers including 4 females and 8 males aged 60 to 90 years (73.42 ± 14.57 years), without formalin fixation, were selected. Guided by an ultrasound transducer, we punctured acupotomy to release lumbar LF in L3/L4, L4/L5, and L5/S1 segments. In the transverse-axis approach, the probe was placed transversely, while in the longitudinal-axis approach, the probe was placed longitudinally. The depth of needle penetration (A), the distance between the puncture point and spinous process (B), and the distance between the puncture point and sacral cornu (C) were measured on cadavers, and the depth of needle penetration (U-A), the distance between the puncture point and spinous process (U-B), and the angle for acupotomy (D) on ultrasound images were also measured. Statistical analyses were carried out using SPSS. Paired sample t-tests and homogeneity of variance tests and one-way analysis of variance (ANOVA) were performed. The Pearson correlation coefficients and linear correlation coefficients were calculated for the data obtained from ultrasound and cadaver measurements. Results. No obvious blood vessels and nerves were observed in the puncture path, and the spinal dura was intact. There was no statistical difference between the left and right side measurements obtained from the ultrasound images and the cadavers. The penetration depth in the transverse-axis approach was less than that in the longitudinal-axis approach, and the angle of the needle in the transverse-axis approach was greater than that in the longitudinal-axis approach. The measured data for the transverse-axis approach for L3/L4, L4/L5, and L5/S1 segments showed that there were no differences in the needle angle, the depth of needle penetration, and the distance from the spinous process to the puncture point among the three segments. There was a strong correlation between the depth of needle penetration and the distance from the spinous process to the puncture point on the ultrasonic images and the cadavers on the path of acupotomy. Linear equation A = 2.02 + 0.83 ∗ U-A, R2 = 0.352; B = 1.37 + 0.71 ∗ U-B, R2 = 0.252, where A/B refers to the data measured on the cadavers and U-A/U-B refers to the data measured on the ultrasound images. Conclusion. In this study, ultrasound guidance was applied, which better guaranteed the safety and feasibility of acupotomy therapy. Before performing the treatment, the depth of needle penetration in the human body can be determined by measuring the distance between the needle point and the target position on the ultrasound image. Under ultrasound guidance, the transverse-axis approach has a smaller puncture depth and greater puncture angle than the longitudinal-axis approach. Hence, this study believes that the transverse-axis approach is safer for the clinical application of ultrasound-guided LF acupotomy lysis.

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Magnetic Resonance Imaging of Cerebral Central Sulci: a Study of Monozygotic Twins

Acta geneticae medicae et gemellologiae twin research ◽

10.1017/s000156600000026x ◽

1998 ◽

Vol 47 (2) ◽

pp. 89-100 ◽

Cited By ~ 6

Author(s):

I. Bonan ◽

A.M. Argenti ◽

M. Duyme ◽

D. Hasboun ◽

A. Dorion ◽

...

Keyword(s):

Intraclass Correlation ◽

Monozygotic Twins ◽

Correlation Coefficients ◽

Mean Value ◽

Resonance Imaging ◽

Mr Images ◽

Central Sulcus ◽

Intraclass Correlation Coefficients ◽

Left Right Asymmetry ◽

The Brain

AbstractThe cerebral central sulci, seat of the sensorimotor cortex, vary anatomically in form, length and depth among individuals and present a left/right asymmetry. The purpose of this work was to measure central sulcus's lengths, at the surface and in-depth, in each hemisphere of monozygotic twins in order to evaluate the influence of environmental factors on the morphometry and asymmetry of this structure. A measurement technique on MR images of the brains using 3 D software was developed. Two operators applied this technique to measure central sulcus lengths at the surface of the brain and in-depth in each hemisphere. Besides the fact that the technique developed gave high Intraclass Correlation Coefficients (ICC) for the surface lengths (mean value 0.94), and slightly less high for the in-depth length (mean value 0.87), we found a weak (from 0.57 to 0.73 for raw data) but significant ICC between homologous sulci in pairs of twins. In addition, the ICC for asymmetry indices were not significant. Hence, if central sulcus morphometry is in part genetically influenced, these results show that nongenetic factors are nonetheless important in their development.

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Correlation between ultrasonic and radiographic imaging of developmental dysplasia of the hip

Journal of Children s Orthopaedics ◽

10.1302/1863-2548.13.180165 ◽

2019 ◽

Vol 13 (2) ◽

pp. 155-160 ◽

Cited By ~ 2

Author(s):

A. J. Spaans ◽

F. J. A. Beek ◽

C. S. P. M. Uiterwaal ◽

J. E. H. Pruijs ◽

R. J. Sakkers

Keyword(s):

Femoral Head ◽

Developmental Dysplasia ◽

Acetabular Index ◽

Ultrasound Images ◽

Radiographic Imaging ◽

Femoral Head Coverage ◽

Level Of Evidence ◽

Developmental Hip Dysplasia ◽

Α Angle

Purpose The correlation between the degree of developmental hip dysplasia (DDH) measured on ultrasound images compared with that measured on radiographs is not clear. Most studies have compared ultrasonography (US) and radiographic images made at different times of follow-up. In this study the correlation between US images and radiographs of the hip made on the same day was evaluated. Methods US images and radiographs of both hips of 74 infants, who were treated for stable DDH, were reviewed in a retrospective study. Only infants who had an US examination and a radiograph on the same day were included. Results The correlation between α-angle of Graf and femoral head coverage on US was strong (p ≤ 0.0001). Weak correlations were found between the acetabular index of Tönnis on radiographs and α-angle of Graf on US (p = 0.049) and between acetabular index of Tönnis on radiographs and femoral head coverage of Morin on US (p = 0.100). Conclusion This study reports on the correlation between US and radiographic imaging outcomes, both made on the same day in patients for treatment and follow-up of DDH. Level of Evidence IV

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PLATELET MEMBRANE GLYCOPROTEINS ABNORMALITIES IN MYELOPROLIFERATIVE DISORDERS. STRUCTURE/FUNCTION RELATIONSHIP

10.1055/s-0038-1643508 ◽

1987 ◽

Author(s):

M Mazzucato ◽

M G Del Ben ◽

A Casonato ◽

V De Angelis ◽

L De Marco

Keyword(s):

Normal Values ◽

Dissociation Constants ◽

Platelet Rich Plasma ◽

Myeloproliferative Disorders ◽

Mean Value ◽

Platelet Membrane ◽

P Value ◽

Computer Assisted ◽

Membrane Glycoproteins ◽

Binding Isotherms

The platelet membrane glycoproteins (GP) lb and GPIIb/IIIa were investigated in 10 patients with myeloproliferative disorders. 2 patients had essential thrombocytemia (ET), 2 had chronic myeloid leukemia (CML) and 6 policytemia vera (PV). The number of GP molecules were detected by radiolabelled monoclonal antibodies anti GPIb and anti GPIIb/IIIa complex (gift of dr. Z.M. Ruggeri) and their function was evaluated by using, in a binding assay, purified radiolabelled asialo von Willebrand factor (1251 ASvWF) and purified radiolabelled fibrinogen (1251 F). Binding isotherms were evaluated by Scatchard type analysis using the computer assisted programLigand. The binding of 1251 anti GPIb to the platelets of the ten patients showed 14,955 ∓ 4,636 molecules/platelet (M/Plt) compared to 19,790 ∓ 3,791 M/Plt of 11 normals with a p value < 0.01. The binding of 125IAsvWF to the GPIb of nonstimulated platelets in platelet rich plasma (PRP) was then measured and ound to be decreased. The dissociation constants (Kds) were within normal values except in one patient. There was a good correlation (r = 0.91, p < 0.01) between the amount of 1251 ASvWF bound and GPIb molecules. The binding of radiolabelled anti GPIIb/IIIa to the platelets of six patients (4 with PV and 2 with CML) was measured and found to be constantly decreased in all patients with a mean value of 25,349 ∓ 2,077 M/Plt compared to 43,192 ∓ 6,354 M/Plt found in normals (p < 0.01). 1251 fibrinogen binding to the GPIIb/IIIa complex of ADP + adrenalin stimulated washed platelet was studied in 2 patients and we found 16,267 M/Plt and 14,752 M/Plt respectively, significantly diminished when compared to the mean value of 36,591 M/Plt found in 2 normal controls. The Kds were within normal values. Our studies demonstrate a significant decrease of GPIb and GPIIb/IIIa on the platelet membrane of patients with myeloproliferative disorders. Furthermore this decrease is accompanied by a diminished binding of both vWF and F to their platelets receptors. These findings may partly explain the hemorragic tendency often encountered in these patients.

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Between-Day Reliability of a Cluster-Based Method for Multisegment Kinematic Analysis of the Foot-Ankle Complex

Journal of the American Podiatric Medical Association ◽

10.7547/8750-7315-104.6.601 ◽

2014 ◽

Vol 104 (6) ◽

pp. 601-609 ◽

Cited By ~ 6

Author(s):

Thales R. Souza ◽

Haroldo L. Fonseca ◽

Ana Carolina A. Vaz ◽

Juliana S. Antero ◽

Cristiano S. Marinho ◽

...

Keyword(s):

Subtalar Joint ◽

High Reliability ◽

Intraclass Correlation ◽

Correlation Coefficients ◽

Neutral Position ◽

Multiple Correlation ◽

Noninvasive Methods ◽

Intraclass Correlation Coefficients ◽

Ankle Complex ◽

Kinematic Evaluation

Background Detailed description of foot pronation-supination requires multisegment evaluation of the kinematics of the foot-ankle complex. There are noninvasive methods with independent (single) tracking markers attached directly to the skin. However, these methods are inconsistent with the usual rigid segments assumption. In contrast, using clustered markers is compatible with this assumption and is necessary for analyses that need tracking markers to be distant from the foot (eg, shod walking). This study investigated the between-day reliability of a cluster-based method for multisegment analysis of foot-ankle angles related to pronation-supination. Methods Ten healthy adults participated in the study. An anatomically based, three-dimensional model comprising the shank, calcaneus, and forefoot was created. Rigid clusters of tracking markers were used to determine the relative positions and motions of the segments. Mean positions were measured with the subtalar joint in neutral position during standing. Furthermore, mean angles, peaks, and timings of peaks were measured during the stance phase of walking. All of the variables were measured twice, with a 1-week interval. To evaluate reliability, intraclass correlation coefficients were calculated for discrete variables and coefficients of multiple correlation for entire gait curves. Results Intraclass correlation coefficients varied from 0.8 to 0.93 for the angles obtained when the subtalar joint was in neutral and from 0.76 to 0.9 for walking variables. Coefficients of multiple correlation varied from 0.93 to 0.97 for walking curves. Conclusions The method described has good to high reliability and provides a systematic method for multisegment kinematic evaluation of foot-ankle pronation-supination.

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