scholarly journals Influence of morphometric intercondylar notch parameters in ACL ruptures

2006 ◽  
Vol 53 (4) ◽  
pp. 79-83 ◽  
Author(s):  
L. Stijak ◽  
V. Nikolic ◽  
Z. Blagojevic ◽  
V. Radonjic ◽  
G. Santrac-Stijak ◽  
...  
Keyword(s):  
Distal Part ◽  
Knee Injuries ◽  
Morphometric Parameters ◽  
Intercondylar Notch ◽  
Acl Injuries ◽  
Notch Width ◽  
Methods Of Calculation ◽  
Maximal Width ◽  
History Of ◽  
The Difference

The most important anatomic risk factors in ACL lesions are the morphometric parameters of intercondylar notch. In the morphometric studies index of notch width and index of notch shape (NWI and NSI) are commonly used. The certain morphologic parameters of distal femoral part are used in calculation. Beside standard parameters we measured the maximal width of intercondylar notch and distal part of femur, which we used for calculation of maximal index of notch width and maximal index of notch shape (NWI max and NSI max). We compared two different methods of calculation of intercondylar notch indexes to find out which one represent anatomic risk factor and influence the ACL lesions. The indexes were measured in the two groups of patients (33) who have the history of knee injuries, the first group has document of ACL injuries and the second without ACL injuries (control one). The important difference between two groups was founded in NWI (p<0.01) and NSI (p<0.05). NWImax and NSImax do not show the difference (p>0.05). The NWI and NSI importance is higher in males, and smaller in females. There is no difference in NWImax and NSImax (p>0.05) comparing to the gender.

scholarly journals The Effect of The Intercondyler Notch Width Index on Anterior Cruciate Ligament Injuries

2014 ◽  
Vol 2 (11_suppl3) ◽  
pp. 2325967114S0020
Author(s):  
Cemile Ayşe Görmeli ◽  
Gökay Görmeli ◽  
Yağmur Burak Öztürk ◽  
Zeynep Özdemir ◽  
Ayşegül Kahraman
Keyword(s):  
Injury Risk ◽  
Acl Injury ◽  
Intercondylar Notch ◽  
Mr Images ◽  
Acl Injuries ◽  
Notch Width ◽  
Increased Risk ◽  
Significant Difference ◽  
Intercondylar Notch Width ◽  
Notch Width Index

Objectives: To evaluate the relationship of the intercondylar notch width with unilateral and bilateral ACL injury by using MR images. Methods: The intercondylar notch width index was measured on the MR images of 18 patients with a bilateral ACL injury, 38 patients with a unilateral ACL injury and 53 healthy subjects with a normal ACL and the results of all groups were compared with each other. Results: The mean NWI values were 0.227 (±0.008) in bilateral injured; 0.245 (±0.009) in unilateral injured and 0.272 (±0.01) in control groups and 0.251(±0.01) in unaffected side of the unilateral group. There were statistically significant differences in intercondylar notch width index (NWI) values between all groups and there was a significant difference between the affected and the unaffected sides in group with unilateral ACL injury. A cutoff value of 0.25 for NWI gave an odds ratio of 26.5 for bilateral and 3.23 for unilateral ACL injuries. Conclusion: The finding that NWI is significantly narrowed in patients with bilateral and unilateral ACL tears compared with the healthy controls suggest a relationship between a narrow NWI and an increased risk of ACL injury. The patients with a narrow NWI should also be screened contralaterally for assessment of ACL injury risk on the other knee. So, specialized training programmes for the people with narrow NWI can be prepared for preventing ACL injuries.

Prevention of ACL Injuries

1997 ◽  
Vol 6 (2) ◽  
pp. 80-96 ◽  
Author(s):  
Steven H. Ryder ◽  
Robert J. Johnson ◽  
Bruce D. Beynnon ◽  
Carl F. Ettlinger
Keyword(s):  
At Risk ◽  
Female Athletes ◽  
Cruciate Ligament ◽  
Knee Injuries ◽  
Shielding Effect ◽  
Ligament Injury ◽  
Acl Injuries ◽  
Notch Width ◽  
Width Measurements ◽  
Anterior Cruciate

Athletes are particularly at risk for anterior cruciate ligament injury, and there is some evidence that female athletes are more at risk than males. The conflicting principles of stability and mobility are at odds within the knee, setting the stage for potentially serious injuries. Some investigators suggest that the size of the intercondylar notch should be used to identify athletes at risk for ACL damage, but more research is required before clinical decisions can be based on notch width measurements. Athletic shoe modifications and artificial playing surfaces may influence the incidence of ACL injures. Functional knee braces appear to have beneficial strain shielding effect on the ACL for anterior directed loads and internal–external torques applied to the tibia, but this effect appears to decrease as the magnitude of these anterior directed loads and torques increases. Ski equipment is often pointed to as a contributing factor in ACL injuries, but there is no evidence that modifications in ski equipment will decrease ACL disruptions. An education program based on recognizing the events that lead to ACL injury in skiing may reduce knee injuries in the future.

scholarly journals The influence of the morphometric parameters of the intercondylar notch on rupture of the anterior cruciate ligament

2012 ◽  
Vol 69 (7) ◽  
pp. 576-580 ◽  
Author(s):  
Lazar Stijak ◽  
Milos Malis ◽  
Ruzica Maksimovic ◽  
Milan Aksic ◽  
Branislav Filipovic
Keyword(s):  
Risk Factors ◽  
Anterior Cruciate Ligament ◽  
Cruciate Ligament ◽  
Shape Index ◽  
Morphometric Parameters ◽  
Control Group ◽  
Study Group ◽  
Intercondylar Notch ◽  
Notch Width ◽  
Anterior Cruciate

Background/Aim. Morpohometric parameters of the intercondylar notch of femur present one of the substantial risk factors for rupture of the anterior cruciate ligament (ACL). In morphometric studies of the knee the most often referred indexes are notch width index and notch shape index. The aim of this study was to identificate the morphometric parameters of the intercondylar notch as risk factors for ACL rupture. Methods. This study included 99 patients divided into two groups: the study group (n = 57) composed of patients with chronic instability of the knee because of previos rupture of the ACL, and the control group (n = 42) composed of patients with lesion of the knee, but without rupture of the ACL. Measuring the width and height of intercondylar notch and epicondylar width was observed on a horizontal MR section. According to these values notch width and notch shape indexes were calculated. Results. The study group had statistically significantly higher (p < 0.05) intercondylar notch and lesser notch shape index than the control group (p < 0.05). The difference was highly statistically significant (p < 0.01) only in males, but not in females (p > 0.05). Absolute dimensions of the morphometric parameters of the distal part of the femur had highly statatistically significant larger values (p < 0.01) in males than females, exept in case of the intercondilar height in the control group (p > 0.05). Conclusion. Enhanced height of the intercondylar notch as well as lesser value of the notch shape index are associated with rupture of the ACL in males but not in females.

Harsdörffers Geschirr

2019 ◽  
Vol 10 (1) ◽  
pp. 23-37
Author(s):  
Natalie Binczek
Keyword(s):  
Design History ◽  
History Of ◽  
The Difference

Der deutsche Barockdichter Georg Philipp Harsdörffer skizziert eine Theorie der Emblematik, die vor allem dessen Anwendungsvielfalt hervorhebt. Er hebt dabei besonders den Unterschied zwischen buchinterner und buchexterner Verwendung auf, indem er sich nicht nur für die Aufnahme der Embleme in Büchern, sondern auch auf Geschirr und Tapeten ausspricht. Der Beitrag liest Harsdörffers extensive Überlegungen nicht nur als Beiträge zur Theorie und Geschichte der Embleme als ›Sinn-Bilder‹, sondern auch als Beitrag zur Designgeschichte. German Baroque poet Georg Philipp Harsdörffer delineates a theory of emblematics that clearly sets itself apart from other contemporary theories, especially by its versatility. In particular, the author negates the difference between internal and external usage of emblems in books not only by promoting the incorporation of emblems into printed works but also by supporting their depiction on dishes and tapestries. This article strives to read Harsdörffer’s extensive thoughts on the matter of emblems not simply as another work on the theory and history of emblematics but rather as a contribution to design history as well

Geoinformation Mapping Through the Types of Geological and Geomorphological Structure of the Katun Valley (Altay Mountains) Based on Morphometric Indicators

2018 ◽  
Vol 938 (8) ◽  
pp. 38-43
Author(s):  
S.A. Kotler ◽  
I.D. Zolnikov ◽  
D.V. Pchelnikov
Keyword(s):  
Morphometric Parameters ◽  
Morphometric Parameter ◽  
Geological History ◽  
Mountain Rivers ◽  
Quaternary Period ◽  
Modern Variety ◽  
Altay Mountains ◽  
History Of

The types of geological and geomorphological structure of the Katun valley are distinguished in the work. For this, a method of geoinformation mapping using morphometric indicators of the valley’s width and meandering of the channel was developed. The morphometric parameter of the valley’s width was calculated as the total area of terraces. As the morphometric parameters of the channel’s meandering, the angles of the river segments’ deviation relative to each other were calculated. Conjugated analysis of these morphometric indicators enabled identifying 18 morphotypes. These morphotypes according to the geological and geomorphological structure of the valley were combined into 4 classes. Separation of the Katun valley in certain classes and morphotypes is due to the different geological history of these sites during the Quaternary period. The most important reasons predetermining the modern variety of geological and geomorphological types of the valley are neotectonic movements and exogenous phenomena (glaciers, dam lakes, landslides, etc.) naturally localized in the space from the upstream of the river to its exit into the foothills. The developed method can be applied for quantitative morphometric classification of the mountain rivers’ valleys in other regions.

Introduction

2017 ◽  
Author(s):  
Simon Kirchin
Keyword(s):  
Hilary Putnam ◽  
Bernard Williams ◽  
General Methodology ◽  
Thick Concepts ◽  
History Of ◽  
Philippa Foot ◽  
The Difference

This chapter introduces the distinction between thin and thick concepts and then performs a number of functions. First, two major accounts of thick concepts—separationism and nonseparationism—are introduced and, in doing so, a novel account of evaluation is indicated. Second, each chapter is outlined as is the general methodology, followed, third, by a brief history of the discussion of thick concepts, referencing Philippa Foot, Hilary Putnam, Gilbert Ryle, and Bernard Williams among others. Fourth, a number of relevant contrasts are introduced, such as the fact–value distinction and the difference between concepts, properties, and terms. Lastly, some interesting and relevant questions are raised that, unfortunately, have to be left aside.

The Early History of Financial Economics, 1478–1776. By Geoffrey Poitras. Cheltenham and Northampton: Edward Elgar, 2000. Pp. x, 522.

2002 ◽  
Vol 62 (1) ◽  
pp. 268-269
Author(s):  
Larry Neal
Keyword(s):  
Economic History ◽  
Financial Analysis ◽  
Adam Smith ◽  
Economic Thought ◽  
Financial History ◽  
X 522 ◽  
History Of ◽  
The Difference ◽  
Wealth Of Nations ◽  
Simon Fraser University

Economic historians usually have to explain to their economist colleagues the difference between economic history, which focuses on facts, and history of economic thought, which focuses on ideas. Our colleagues in finance departments, typically fascinated by episodes in financial history treated by economic historians, are bound to be disappointed in the lack of attention given to the development of ideas in finance by historians of economic thought. Geoffrey Poitras, a professor of finance at Simon Fraser University, makes a valiant effort to remedy these oversights in his collection of vignettes that highlight the sophistication of financial instruments and analysts of financial markets well before the time of Adam Smith. Starting in 1478 with the publication of the Treviso Arithmetic, a typical textbook of commercial arithmetic for Italian merchants, and ending with brief snippets from the Wealth of Nations, Poitras treats the reader to a fascinating potpourri of excerpts from various manuals, brief biographies of pioneers in financial analysis, and historical discursions on foreign-exchange and stock markets.

scholarly journals Reproducibility and Instruction Following in the Shop Floor Laboratory Work: The Case of a TMS Experiment

2021 ◽  
pp. 016224392110323
Author(s):  
Kristina Popova
Keyword(s):  
Measurement Procedure ◽  
Shop Floor ◽  
Experimental Uncertainty ◽  
Local Measurement ◽  
Replication Crisis ◽  
History Of ◽  
Per Se ◽  
The Difference ◽  
Methodological Guidelines ◽  
Local Procedure

The article addresses the production of reproducibility as a topic that has become acutely relevant in the recent discussions on the replication crisis in science. It brings the ethnomethodological stance on reproducibility into the discussions, claiming that reproducibility is necessarily produced locally, on the shop floor, with methodological guidelines serving as references to already established practices rather than their origins. The article refers to this argument empirically, analyzing how a group of novice neuroscientists performs a series of measurements in a transcranial magnetic stimulation experiment. Based on ethnography and video analysis, the article traces a history of the local measurement procedure invented by the researchers in order to overcome the experimental uncertainty. The article aims to demonstrate (1) how reproducibility of the local procedure is achieved in the shop floor work of the practitioners and (2) how the procedure becomes normalized and questioned as incorrect in the course of experimental practice. It concludes that the difference between guidelines and practical actions is not problematic per se; what may be problematic is that researchers can be engaged in different working projects described by the same instruction.

Incidence of postural headache after lumbar puncture requiring epidural blood patch: Effects of needle caliber; 2-year experience

2021 ◽  
pp. 197140092110006
Author(s):  
Warren Chang ◽  
Ajla Kadribegic ◽  
Kate Denham ◽  
Matthew Kulzer ◽  
Tyson Tragon ◽  
...  
Keyword(s):  
Risk Factors ◽  
Lumbar Puncture ◽  
Conservative Management ◽  
Epidural Blood Patch ◽  
Female Gender ◽  
Regional Hospital ◽  
Younger Age ◽  
Blood Patch ◽  
History Of ◽  
The Difference

Purpose A common complication of lumbar puncture (LP) is postural headaches. Epidural blood patches are recommended if patients fail conservative management. Owing to a perceived increase in the number of post-lumbar puncture headaches (PLPHs) requiring epidural blood patches at a regional hospital in our network, the decision was made to switch from 20 to 22 gauge needles for routine diagnostic LPs. Materials and methods Patients presenting for LP and myelography at one network regional hospital were included in the study. The patients were contacted by nursing staff 3 days post-procedure; those patients who still had postural headaches after conservative management and received epidural blood patches were considered positive cases. In total, 292 patients were included; 134 underwent LP with 20-gauge needles (53 male, 81 female, average age 57.7) and 158 underwent LP with 22-gauge needles (79 male, 79 female, average age 54.6). Results Of 134 patients undergoing LP with 20-gauge needles, 15 (11%) had PLPH requiring epidural blood patch (11 female, 3 male, average age 38). Of 158 patients undergoing LP with 22-gauge needles, only 5 (3%) required epidural blood patches (all female, average age 43). The difference was statistically significant ( p < 0.01). Risk factors for PLPH included female gender, younger age, lower body mass index, history of prior PLPH and history of headaches. Conclusion Switching from 20-gauge to 22-gauge needles significantly decreased the incidence of PLPH requiring epidural blood patch. Narrower gauge or non-cutting needles should be considered in patients with risk factors for PLPH, allowing for CSF requirements.

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