scholarly journals Comparing Dimensions of Four-Strand Hamstring Tendon Grafts with Native Anterior and Posterior Cruciate Ligaments

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Barış Yılmaz ◽  
Güzelali Özdemir ◽  
Elif N. Keskinöz ◽  
Gamze Tümentemur ◽  
Kemal Gökkuş ◽  
...  
Keyword(s):  
Significant Relationship ◽  
Hamstring Tendon ◽  
Hamstring Tendons ◽  
Cruciate Ligaments ◽  
Cross Sectional ◽  
Fresh Frozen ◽  
Length Width ◽  
Tendon Grafts ◽  
The Cross ◽  
Made In

Background. The aim of the study was to evaluate whether or not there was any incompatibility between four-strand hamstring tendons taken from the same knee and the dimensions of the ACL and PCL.Methods. 15 fresh frozen cadaver hamstrings were prepared as four-strand grafts and measurements made of the ACL and PCL circumferences in the midsection were made in the narrowest part of the midsection. The cross-section areas and diameters were calculated with geometric calculations used to measure the cross-sectional area of cylinders. Accepting that the geometric insertions were elliptical, the length, width, and area were calculated for entry areas.Results. A significant relationship at 96.2% was determined between the ACL mid and the hamstring diameter. A significant relationship at 96.7% was determined between the ACL and the hamstring mid area. A significant relationship at 96.4% was determined between the PCL mid and the hamstring diameter. A significant relationship at 95.7% was determined between the PCL and the hamstring mid area.Conclusion. For the reconstruction of ACL and PCL, it was determined that there is less incompatibility between the four-strand hamstring tendons taken from the same knee and the dimensions of the midsection PCL compared to the ACL dimensions.

scholarly journals A T-capsulotomy provides increased hip joint visualization compared with an extended interportal capsulotomy

2019 ◽  
Vol 6 (2) ◽  
pp. 157-163 ◽  
Author(s):  
Gregory L Cvetanovich ◽  
David M Levy ◽  
Edward C Beck ◽  
Alexander E Weber ◽  
Benjamin D Kuhns ◽  
...  
Keyword(s):  
High Resolution ◽  
Hip Joint ◽  
Cross Sectional Area ◽  
T Test ◽  
Sectional Area ◽  
Cross Sectional ◽  
Digital Photograph ◽  
Fresh Frozen ◽  
The Cross ◽  
Cadaveric Model

Abstract The purpose of this study was to compare the cross-sectional area (CSA) of joint visualization between extended interportal and T-capsulotomies. Twenty fresh-frozen cadaveric hips were dissected to their capsuloligamentous complexes and fixed in a custom apparatus in neutral hip position. Ten hips underwent sequential interportal capsulotomies at lengths of 2, 4, 6, and 8 cm. Ten hips underwent sequential T-capsulotomies starting from a 4 cm interportal capsulotomy, creating a 2 cm T-capsulotomy (Half-T), and finally a 4 cm T-capsulotomy (Full-T). Following each sequential capsule change in both groups, a high-resolution digital photograph was taken to measure the visualized intra-articular cross-sectional area (CSA). Independent t-test was used to compare CSA interportal and T-capsulotomy groups. Analysis demonstrated a statistically significant increase in CSA visualization with each sequential increase in interportal capsulotomy length up to 6 cm (2cm: 0.6 ± 0.2 cm2; 4cm: 2.1 ± 0.5 cm2 (p<0.001); 6cm: 3.6 ± 1.0 cm2 (p=0.001)), and no difference at 8cm (4.2 ± 1.2 cm2 (p=0.20)). For the T-capsulotomy group the average CSA visualization significantly increased from 3.2 ± 0.9 cm2 for the Half-T to 7.1 ± 1.0 cm2 for the Full-T (p<0.001). The Half-T CSA visualization was not statistically different from the 6 cm capsulotomy (p=0.4) and the 8cm capsulotomy (p=0.05). The Full-T had significantly superior CSA visualization area as compared to the 6 cm and 8 cm interportal capsulotomies (p<0.001 for both). In conclusion, T-capsulotomy resulted in improved cross-sectional area of joint visualization compared to an extended (8cm) interportal capsulotomy in a cadaveric model. Surgeons must weigh the benefits of greater visualization from T-capsulotomy that may help to avoid residual FAI while ensuring to completely repair the capsulotomy to avoid iatrogenic instability.

Braided Hamstring Tendons for Reconstruction of the Anterior Cruciate Ligament: A Biomechanical Analysis

2002 ◽  
Vol 30 (5) ◽  
pp. 684-688 ◽  
Author(s):  
John E. Tis ◽  
William R. Klemme ◽  
Kevin L. Kirk ◽  
Kevin P. Murphy ◽  
Bryan Cunningham
Keyword(s):  
Anterior Cruciate Ligament ◽  
Patellar Tendon ◽  
Cruciate Ligament ◽  
Hamstring Tendon ◽  
Biomechanical Analysis ◽  
Hamstring Tendons ◽  
Tendon Grafts ◽  
Anterior Cruciate ◽  
Strength And Stiffness ◽  
Bone Patellar Tendon

Background: In an effort to improve the strength and stiffness of anterior cruciate ligament grafts, several authors have advocated alterations of graft structure and orientation, including braiding the tendons in hamstring tendon grafts. Hypothesis: Braiding hamstring tendons does not increase graft strength and stiffness. Study Design: Controlled laboratory study. Methods: Sixteen hamstring tendon and 21 bone-patellar tendon-bone grafts were harvested from 12 cadavers and divided into three groups: 1) braided four-strand hamstring tendon, 2) unbraided four-strand hamstring tendon, and 3) bone-patellar tendon-bone. All grafts were placed under a 50-N preload on a servohydraulic testing device and were tensioned to failure. Results: The strength and stiffness of the tested specimens averaged 427 ± 36 N and 76 ± 10 N/mm, respectively, for braided specimens, 532 ± 44 N and 139 ± 18 N/mm for unbraided specimens, and 574 ± 46 N and 158 ± 15 N/mm for patellar tendon specimens. There was a 20% decrement in hamstring tendon graft tensile strength and a 45% decrease in stiffness after braiding because of the suboptimal multidirectional orientation of individual tendons within the braided grafts. Conclusions: In vitro braided hamstring tendon grafts demonstrated mechanically inferior strength and stiffness characteristics compared with unbraided hamstring tendon grafts and patellar tendon grafts. Clinical Relevance: Braiding of hamstring tendon grafts provides no mechanical advantage in anterior cruciate ligament reconstruction.

scholarly journals Faktor-faktor Marketing Mix yang Berhubungan dengan Keputusan Pasien Memilih Rawat Inap Rumah Sakit Manembo-Nembo Bitung

2020 ◽  
Vol 1 (2) ◽  
pp. 061
Author(s):  
Rickhard Williams Makawimbang ◽  
Grace Ester Caroline Korompis ◽  
Sylvia L Mandey
Keyword(s):  
Logistic Regression ◽  
Multivariate Analysis ◽  
Significant Relationship ◽  
Marketing Mix ◽  
Research Data ◽  
Dominant Factor ◽  
Cross Sectional ◽  
Physical Evidence ◽  
A Value ◽  
Made In

Background: Hospital marketing management is an effort that can be done to make utilization of hospital services higher and thus impact on the decision of patient choosing a hospital, the high and low desire of consumers or the public to use a hospital service product based on the application of the existing marketing mix. Research Methods: This study was an observational study with a cross sectional study design. The population in this study were patients from all classes of hospital care. The sample in the study was a sample that met the inclusion and exclusion criteria of 53 patients. The variables in this study were the marketing mix variable, namely: location, cost, personnel, promotion, physical evidence, products with the dependent variable, namely the decision to choose hospitalization. The research data were analyzed using univariate, bivariate and multivariate analysis and logistic regression statistical calculations. Presentation of data was made in table and narrative form. The research data were analyzed using univariate, bivariate and multivariate analysis and logistic regression statistical calculations. Data presentation was made in the form of tables and narratives. Research Results: The results showed that there was a significant relationship between the location and the decision to choose hospitalization with a value of p = 0.004, there was a significant relationship between costs and the decision to choose hospitalization with a value of p = 0.000, there was a significant relationship between personnel and the decision to choose hospitalization with a value of p = 0,000, there was no significant relationship between promotion and the decision to choose hospitalization with a value of p = 0.184, there was a significant relationship between the process and the decision to choose hospitalization with a value of p = 0.018, there was a relationship between the product and the decision choosing hospitalization with a value of p = 0.013 and there was no significant relationship between physical evidence and the decision to choose to be hospitalized with a value of p = 0.300. The results of the multivariate analysis showed that cost (p = 0.001) was the most dominant factor influencing the decision to choose to be hospitalized at Manembo-nembo Type C Hospital. Conclusion: The conclusion of this study is that the factors of location, cost, personnel, processes and products are related to the decision to choose to be hospitalized. The most dominant factor related to the decision to choose to hospitalization is cost.

scholarly journals PEKERJAAN IBU MEMPENGARUHI PEMBERIAN MPASI DINI BAYI 0 - 6 BULAN

2018 ◽  
Vol 9 (1) ◽  
pp. 42-44
Author(s):  
Diah Eka Nugraheni
Keyword(s):  
Significant Relationship ◽  
Complementary Feeding ◽  
Health Workers ◽  
Sampling Technique ◽  
P Value ◽  
Analytic Method ◽  
Supplemental Feeding ◽  
Cross Sectional ◽  
High Incidence ◽  
The Cross

Early complementary feeding in Bengkulu is still highbased on data obtainedfrom Bengkulu Profile Provinsi in 2012 the total of babies who are exclusively breastfedbabies 417 803 (41%) of the 43 953, meaning there is 26.015 infants (51%) were gets anearlycomplementary feeding. The problem of this study is the high incidence of givingextra food for baby before the baby is 6 months old. The purpose ofthis research was todetermine the factor sassociated with Early complementary feeding in Sawah lebar KotaBengkulu. Types of research is descriptive analytic method with the cross sectional studydesign. The population is mothers with infants aged 0-6 months which amounted to 279babies. Samples were taken by using a Acciedental sampling technique as many as 164babies. The results showed, work have p value=0.009 with OR2.48, This indicates that thevariable, work has p value<0.05 means significant relationship with the provision of earlycomplementary feeding. Health workers are expected to conduct health educationregarding appropriate supplemental feeding on the baby's mother.

scholarly journals The emergence of free intervals in the traffic flow depending on the intensity of movement and speed

2021 ◽  
pp. 184-190
Author(s):  
Tetiana Sokolenko ◽  
◽  
Anatoliy Palchyk ◽  
Keyword(s):  
Traffic Flow ◽  
Delay Time ◽  
Lag Time ◽  
Traffic Flows ◽  
Cross Sectional ◽  
Free Interval ◽  
Vehicle Delay ◽  
Flow Intensity ◽  
The Cross ◽  
Made In

The movement of single and group cars in traffic flows was investigated during the work. These studies are used to calculate the vehicle delay time during maneuvers through crossings and adjacencies at the same level. On the basis of the data obtained, the technical and economic discussion of the cross-sectional or adjoining parameters under consideration can be made. In the course of the study, examination will be conducted on the influence of intensity, velocity and traffic flow on the distribution intervals between cars and a graph of this effect for different traffic intensities is to be constructed. On the basis of the provided charts, the dependence of the free interval, necessary for maneuvering, on the traffic flow intensity is described. Using this dependence, you can figure out the number of cars that can be transported continuously. Knowing the traffic flow, its intensity and the distribution of free intervals between cars and groups of vehicles, the lag time of cars that are waiting for the ability to maneuver as well as their quantity can be calculated with the help of the proposed method.

scholarly journals Lottery-like preferences and the MAX effect in the cryptocurrency market

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Melisa Ozdamar ◽  
Levent Akdeniz ◽  
Ahmet Sensoy
Keyword(s):  
Significant Relationship ◽  
Investor Sentiment ◽  
Portfolio Analysis ◽  
Expected Returns ◽  
Sample Period ◽  
Short Term ◽  
Cross Sectional ◽  
Daily Return ◽  
Price Momentum ◽  
The Cross

AbstractWe investigate the significance of extreme positive returns in the cross-sectional pricing of cryptocurrencies. Through portfolio-level analyses and weekly cross-sectional regressions on all cryptocurrencies in our sample period, we provide evidence for a positive and statistically significant relationship between the maximum daily return within the previous month (MAX) and the expected returns on cryptocurrencies. In particular, the univariate portfolio analysis shows that weekly average raw and risk-adjusted return differences between portfolios of cryptocurrencies with the highest and lowest MAX deciles are 3.03% and 1.99%, respectively. The results are robust with respect to the differences in size, price, momentum, short-term reversal, liquidity, volatility, skewness, and investor sentiment.

Tensile mechanical properties of human forearm tendons

2015 ◽  
Vol 40 (7) ◽  
pp. 711-719 ◽  
Author(s):  
J. F. Weber ◽  
A. M. R. Agur ◽  
A. Y. Fattah ◽  
K. D. Gordon ◽  
M. L. Oliver
Keyword(s):  
Mechanical Properties ◽  
Biomechanical Properties ◽  
Cross Sectional Area ◽  
Sectional Area ◽  
Visual Estimation ◽  
Cross Sectional ◽  
Laser Reflectance ◽  
Human Forearm ◽  
Fresh Frozen ◽  
The Cross

Previous studies of the mechanical properties of tendons in the upper limb have used embalmed specimens or sub-optimal methods of measurement. The aim of this study was to determine the biomechanical properties of all tendons from five fresh frozen cadaveric forearms using updated methodology. The cross-sectional area of tendons was accurately measured using a laser reflectance system. Tensile testing was done in a precision servo-hydraulic device with cryo-clamp fixation. We determined that the cross-sectional area of some tendons is variable and directly influences the calculated material properties; visual estimation of this is unreliable. Data trends illustrate that digital extensor tendons possess the greatest tensile strength and a higher Young’s modulus than other tendon types.

On the cross-sectional shape of the cellulose crystallites in the tunicate Halocynthia papillosa

1990 ◽  
Vol 48 (3) ◽  
pp. 566-567
Author(s):  
J.-F. Revol ◽  
Y. Van Daele ◽  
F. Gaill
Keyword(s):  
Contrast Imaging ◽  
Animal Kingdom ◽  
Bright Field ◽  
Field Mode ◽  
Cross Sectional ◽  
Ultrathin Sections ◽  
The Cross ◽  
Sectional Shape ◽  
Valonia Ventricosa ◽  
C Nmr

The only form of cellulose which could unequivocally be ascribed to the animal kingdom is the tunicin that occurs in the tests of the tunicates. Recently, high-resolution solid-state l3C NMR revealed that tunicin belongs to the Iβ form of cellulose as opposed to the Iα form found in Valonia and bacterial celluloses. The high perfection of the tunicin crystallites led us to study its crosssectional shape and to compare it with the shape of those in Valonia ventricosa (V.v.), the goal being to relate the cross-section of cellulose crystallites with the two allomorphs Iα and Iβ.In the present work the source of tunicin was the test of the ascidian Halocvnthia papillosa (H.p.). Diffraction contrast imaging in the bright field mode was applied on ultrathin sections of the V.v. cell wall and H.p. test with cellulose crystallites perpendicular to the plane of the sections. The electron microscope, a Philips 400T, was operated at 120 kV in a low intensity beam condition.

Gender determination of caucasoid hair using image analysis

1993 ◽  
Vol 51 ◽  
pp. 216-217
Author(s):  
T.B. Ball ◽  
W.M. Hess
Keyword(s):  
Image Analysis ◽  
Cross Sections ◽  
Scalp Hair ◽  
The Body ◽  
Equivalent Diameter ◽  
Cross Sectional ◽  
Hair Samples ◽  
Length Width ◽  
Morphological Differences

It has been demonstrated that cross sections of bundles of hair can be effectively studied using image analysis. These studies can help to elucidate morphological differences of hair from one region of the body to another. The purpose of the present investigation was to use image analysis to determine whether morphological differences could be demonstrated between male and female human Caucasian terminal scalp hair.Hair samples were taken from the back of the head from 18 caucasoid males and 13 caucasoid females (Figs. 1-2). Bundles of 50 hairs were processed for cross-sectional examination and then analyzed using Prism Image Analysis software on a Macintosh llci computer. Twenty morphological parameters of size and shape were evaluated for each hair cross-section. The size parameters evaluated were area, convex area, perimeter, convex perimeter, length, breadth, fiber length, width, equivalent diameter, and inscribed radius. The shape parameters considered were formfactor, roundness, convexity, solidity, compactness, aspect ratio, elongation, curl, and fractal dimension.

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