Efficacy of Various Arrangements of Pelvic External Rod Fixators in Polytraumatized Patients at Resuscitation Step

Application of external fixators (EF) in pelvic fractures is one of the important components of antishock therapy in patients with polytrauma. However various fixation techniques possess certain advantages and disadvantages. Comparative analysis of 4 most commonly used variants of pelvic EF mounting, i.e. classic - via upper flaring portion of the ilium, supra-acetabular, orthogonal - combination of screws passes through the wings and supra-acetabular region, and subcristal, that were applied in 32, 48, 13 and 3 patients, was performed. Results of the analysis showed that supra-acetabular pelvic fixation technique a preferable one due to its high efficacy and lower rate of complications as compared to other external fixation methods.

Download Full-text

Methyl methacrylate in external fixation of supracondylar humerus fractures: An experimental study

Proceedings of the Institution of Mechanical Engineers Part H Journal of Engineering in Medicine ◽

10.1177/0954411918796533 ◽

2018 ◽

Vol 232 (10) ◽

pp. 1025-1029

Author(s):

Ali Güleç ◽

Mehmet Ali Acar ◽

Bahattin Kerem Aydin ◽

Teyfik Demir ◽

Mustafa Özkaya

Keyword(s):

Methyl Methacrylate ◽

External Fixation ◽

External Fixator ◽

External Fixators ◽

Three Point Bending ◽

Fixation Methods ◽

Supracondylar Humerus Fractures ◽

Methacrylate Group ◽

Humerus Fractures ◽

K Wires

Supracondylar humerus fractures are common fractures around the elbow. Open fractures, comminuted metaphyseal fractures and also fractures with bone loss may need to be treated with external fixators. The aim of this study is to compare two different external fixators, tubular external fixators and polymethyl methacrylate with K wires external fixators, with regard to stiffness and stability for metaphyseal-diaphyseal osteotomies of distal humerus close to the joint. Six matched pairs (24 specimens) of second-generation sawbone humerus were prepared in a standard fashion to create a metaphyseal fracture, 5 cm proximal to the distal joint line of humerus and were randomly divided into two groups of 12 specimens each. Each sawbone humerus was osteotomized transversely at the mid-olecranon fossa with a 2-mm oscillating saw to simulate a Gartland type III fracture. The osteotomy was then reduced and stabilized using two different external fixation methods: carbon tubular external fixator with Schanz screws and methyl methacrylate with multiple K wires. Three-point bending and torsion tests were performed on the specimens. Bending and torsional stiffness of specimens were obtained for the fixation methods. According to the results of the study, the methyl methacrylate group has provided higher stiffness than classical tubular fixator with Schanz screws in three-point bending test (7.79 ± 2.33 N/mm vs 3.78 ± 1.18 N/mm, p = 0.006). The methyl methacrylate group also showed better stiffness in torsion test (0.12 ± 0.042 N m/° vs 0.067 ± 0.013 N m/°, p = 0.02). We determined for the first time in literature that external fixation with methyl methacrylate was significantly superior to the classical tubular external fixator with Schanz screws with regard to stiffness and stability under three-point bending and torsional loads. Moreover, methyl methacrylate is inexpensive and easily applied.

Download Full-text

A New Fixation Technique for the Lapidus Bunionectomy

Journal of the American Podiatric Medical Association ◽

10.7547/0950405 ◽

2005 ◽

Vol 95 (4) ◽

pp. 405-409 ◽

Cited By ~ 16

Author(s):

James C. Wang ◽

Brendan M. Riley

Keyword(s):

Internal Fixation ◽

External Fixation ◽

External Fixator ◽

Preliminary Report ◽

Delayed Union ◽

Oral Antibiotics ◽

Fixation Technique ◽

Short Course ◽

Time To Initiation ◽

Fixation Techniques

Presented here is a preliminary report of 102 patients who underwent first metatarsocuneiform joint arthrodeses performed with external fixation for the correction of hallux valgus. The advantages of using external fixation are the ability to initiate early weightbearing, predictable fusion, and removal of all of the hardware postoperatively. In the 102 patients reported here, the average time to initiation of unassisted full weightbearing was 13.1 days. The average time to fusion was 5.3 weeks, with removal of the external fixator at an average of 5.5 weeks postoperatively. There was no incidence of delayed union or nonunion. There was one case of pin-tract irritation, which resolved with appropriate pin care and a short course of oral antibiotics. External fixation is an effective alternative to traditional internal fixation techniques in metatarsocuneiform joint arthrodesis. (J Am Podiatr Med Assoc 95(4): 405–409, 2005)

Download Full-text

C2 Translaminar Screw Fixation (Wright`s Technique) Applicability in Atlantoaxial Instability

JBNC - JORNAL BRASILEIRO DE NEUROCIRURGIA ◽

10.22290/jbnc.v23i2.1163 ◽

2018 ◽

Vol 23 (2) ◽

pp. 152-156

Author(s):

Lucas Alves Aurich ◽

Jerônimo Buzetti Milano ◽

Erasmo Barros Da Silva Júnior ◽

Ricardo Ramina

Keyword(s):

Screw Fixation ◽

Atlantoaxial Instability ◽

Rigid Fixation ◽

Fixation Technique ◽

Advantages And Disadvantages ◽

Risks And Benefits ◽

Translaminar Screw Fixation ◽

Translaminar Screw ◽

Fixation Techniques ◽

Atlantoaxial Fixation

Atlantoaxial instability often requires surgical treatment. Several techniques are available to perform antlantoaxial stabilization, and all of these have their different advantages and disadvantages. In 2004, Wright described the C2translaminar screw fixation, which offers rigid fixation but without the technical demands of C2 pars placement and eliminates the risk of vertebral artery injury. The aim of this study is to review the C2 translaminar screw fixation technique, emphasizing operative details, risks and benefits comparing with the others atlantoaxial fixation techniques.

Download Full-text

Agrarian receipts as a tool for the structural transformation of financial and credit relations in the agrarian business of the region

Problems of Innovation and Investment Development ◽

10.33813/2224-1213.18.2019.5 ◽

2019 ◽

pp. 40-53

Author(s):

Yuliia Nehoda

Keyword(s):

Comparative Analysis ◽

Retrospective Analysis ◽

Structural Transformation ◽

Pilot Project ◽

Bank Lending ◽

Economic Benefits ◽

Advantages And Disadvantages ◽

New Instrument ◽

Agricultural Business ◽

Business Entities

The subject of the research – is a set of organizational-economic relations arising in the process of structural transformation of financial and credit relations in the agricultural business. The purpose of the article is a retrospective analysis of structural transformations of financial and credit relations in the agricultural business, evaluation of the effectiveness and feasibility of the introduction of agricultural receipts as a new instrument of lending to the agricultural business of the regions. Methodology of work – system-structural and comparative analyzes (to determine the effectiveness of the crediting mechanism according to the agricultural receipts of the farmers of the region); monographic (when studying the problems of the functioning of the mechanism of lending to agrarians by agrarian receipts) economic analysis (when carrying out a comparative analysis of the mechanism of classical bank lending to the agrarian business and the mechanism of lending to agrarians according to agrarian receipts); modeling and forecasting (when determining ways to overcome the existing deficiencies in the mechanism of lending to agrarian business entities of the region according to agrarian receipts). The results of the work – a retrospective analysis of the structural transformation of financial and credit relations in the agricultural business was carried out. The mechanism of crediting agrarians according to agrarian receipts and the scale of its distribution in the agrarian business of the region are considered. A comparative analysis of the mechanism of classical bank lending to the agrarian business and the mechanism of lending to agrarians according to agrarian receipts was carried out. In the framework of the pilot project “Agrarian receipts in Ukraine” of the international financial corporation (IFC) in partnership with the Swiss Confederation in Ukraine, the example of the Poltava region defined the effectiveness of the crediting mechanism according to the agrarian receipts of the agrarians of the region. The advantages and disadvantages of the mechanism of crediting the subjects of the agrarian business on agrarian receipts are noted. The ways to overcome the existing shortcomings of the mechanism of crediting the subjects of the agrarian business of the region according to agricultural receipts are determined. Conclusions – according to the results of the conducted research, the effectiveness of the mechanism of lending to the agricultural business of the regions according to agricultural receipts was proved, its advantages and disadvantages were noted, and attention was also focused. Proposed in Art. 7 of Law No. 5479-VI clearly delineate cases and restrictions on the debtor’s reimbursement of expenses incurred by the lender with the acquisition of the right to grow and harvest the pledged crop of agricultural products, which will ensure the principle of equality of parties on economic benefits and distribution of credit risks according to agricultural receipts.

Download Full-text

Research of methods of protecting organizations from inimical mergers and acquisitions

10.33983/2075-1826-2020-1-29-45 ◽

2020 ◽

pp. 29-45

Author(s):

O.A. Naydis ◽

I.O. Naydis

Keyword(s):

Comparative Analysis ◽

Mergers And Acquisitions ◽

Positive Effects ◽

Advantages And Disadvantages ◽

Preventive Methods

The article considers the types, forms, mechanisms and classification of mergers and acquisitions, identifies their positive effects, and studies the tactics of acquisitions. The analysis of anti-capture measures: active and preventive methods of protection against hostile mergers and acquisitions. A comparative analysis of anti-capture measures with acquisitions tactics was carried out, the advantages and disadvantages of their application were identified.

Download Full-text

ON COMPARATIVE ANALYSIS OF PERFORMANCE OPTIMIZATION METHODS OF MULTI-PUMP UNITS

СИСТЕМЫ УПРАВЛЕНИЯ И ИНФОРМАЦИОННЫЕ ТЕХНОЛОГИИ ◽

10.36622/vstu.2020.31.10.005 ◽

2020 ◽

pp. 23-28

Author(s):

A.I. Glushchenko ◽

M.Yu. Serov

Keyword(s):

Energy Efficiency ◽

Control System ◽

Comparative Analysis ◽

Performance Optimization ◽

Optimization Methods ◽

Online Optimization ◽

New Approach ◽

Advantages And Disadvantages ◽

Analysis Of Performance

В статье рассматривается вопрос совершенствования системы управления параллельно-работающими насосными агрегатами с целью повышения энергоэффективности их работы. Проведено сравнение и выявление недостатков существующих методов решения рассматриваемой проблемы. Предложена идея нового подхода на базе онлайн оптимизации. The problem under consideration is improvement of the energy efficiency of a control system of parallel-running pump units. Known methods used to solve this problem are considered. Their advantages and disadvantages are shown. Finally, the idea of a new approach, which is based on online optimization, is proposed.

Download Full-text