scholarly journals Improvement of transosseous osteosynthesis with ring fixators in the treatment of tibial nonunions

TRAUMA ◽  
2021 ◽  
Vol 22 (2) ◽  
pp. 68-73
Author(s):  
A.K. Rushai ◽  
Yu.S. Lisaychuk ◽  
A.A. Martynchuk ◽  
M.V. Baida
Keyword(s):  
Evaluation System ◽  
Lower Leg ◽  
Functional Evaluation ◽  
Optimal Conditions ◽  
Treatment Technology ◽  
Results Of Treatment ◽  
Distraction Osteosynthesis ◽  
Severe Pathology ◽  
Modified Functional ◽  
Leg Bones

Background. Treatment of tibial nonunions is not a fully resolved problem. The use of ring fixators (RF) for this pathology is competitive in modern conditions. However, there are also disadvantages. Improvement of RF treatment technology is a promising direction for improving the results of treatment of this severe pathology. Purpose of work was to improve the results of the treatment of nonunions of the shin bones based on improving the technique of using RF taking into account the problematic issues of their use; to determine their effectiveness. Materials and methods. According to the proposed method, 42 patients with tibial nonunions were treated. Spoke-rod devices were used with the improvements we proposed — sharpening, modes of conducting and arrangement of spokes in a ring at angles in different planes. In the ring, which was used to bring the osteotomized segment down du-ring distraction osteosynthesis, the outward pins were inserted to prevent it from tipping over. Semi-closed osteotomy (minimally traumatic and safe) was performed with fan-shaped with a chisel from a cross section up to 2 cm, with the formation of a comminuted fracture. External fusion Softcast/Scotchcast allowed avoi-ding deformation of the regenerate and creating optimal conditions for the fusion of fragments. Results. The following results were obtained for the treatment of patients with nonunions of the lower leg bones using RF with our proposed modes of use according to the Modified Functional Evaluation System by Karlstrom-Olerud. Good results were obtained in 20 patients — 55.6 %. In 4 patients (11.1 %), the results were assessed as good with elements of mode-rate dysfunction. They were 22.000 ± 1.323 points. Satisfactory results were obtained in 7 patients (19.4 %), estimated at 28.0 ± 0.125 points. Bad, unsatisfactory results were observed in 1 case (2.8 %); excellent functional status — in 4 (11.1 %). Conclusions. Bearing in mind the severity of the lesion, we find this result encouraging. Given the insufficient number of observations, it is necessary to recommend the use of the proposed improvements in the use of RF for the treatment of tibial nonunions after fractures and further study of their effectiveness.

The Influence of Hand Dominance in Wrist Fracture Post-Operative Functional Evaluation

2020 ◽  
pp. 229255032093369
Author(s):  
Ronit Wollstein ◽  
Dafna Michael ◽  
Hani Harel ◽  
Lois Carlson
Keyword(s):  
Wrist Fracture ◽  
Functional Evaluation ◽  
Dominant Hand ◽  
Hand Dominance ◽  
Radius Fractures ◽  
Results Of Treatment ◽  
Post Surgery ◽  
Time Period ◽  
Dominant Side ◽  
Little Finger

Sensorimotor testing is used to measure outcomes in surgery, to document results of treatment and rehabilitation, and to compare results between surgeons, therapists, and institutions. When performing sensorimotor testing, failure to address dominant side differences may cause a bias in evaluation of outcomes. This study evaluated the effect of hand dominance on outcomes testing performed on patients following surgery for distal radius fractures (DRF). We hypothesized that the injured dominant hand will perform differently than the injured non-dominant hand. This is a retrospective study of patients following DRF treated surgically and evaluated in therapy. The patients were evaluated at fixed intervals: initially, at 6 weeks, and at 3 months post-surgery. Testing included grip strength, monofilaments, static and moving 2-point discrimination, Moberg testing, and stereognosis. Sixty patients included 46 (76.6%) females. Age averaged 62.1 (standard deviation: 16.9) years, and 54 were right-handed (90%). There were differences between dominant and non-dominant hand injury in 2 of 9 tests of sensibility for each time period, including little finger monofilament and Moberg testing initially, and moving 2-point discrimination in the little finger, monofilament testing of the thumb at 3 months. Both groups improved between initial and 3-month evaluation without differences in amount of improvement. Despite some significant differences in the applied tests between dominant and non-dominant injured hands, our results do not support correction for hand-dominance when using the described examinations in evaluating outcomes following DRF surgery.

scholarly journals Multi-Criteria Evaluation of Best Available Treatment Technology for Waste Lead-Acid Battery: The Case of China

2020 ◽  
Vol 12 (11) ◽  
pp. 4479 ◽  
Author(s):  
Wei Wang ◽  
Yi He ◽  
Deyuan Zhang ◽  
Yufeng Wu ◽  
Dean Pan
Keyword(s):  
Pollution Control ◽  
Evaluation System ◽  
Lead Acid Battery ◽  
Treatment Technology ◽  
Safety Hazards ◽  
Factors Affecting ◽  
Multi Criteria Evaluation ◽  
Potential Safety ◽  
Attribute Hierarchy ◽  
Lead Acid

Improper waste lead-acid battery (LAB) disposal not only damages the environment, but also leads to potential safety hazards. Given that waste best available treatment technology (BATT) plays a major role in environmental protection, pertinent research has largely focused on evaluating typical recycling technologies and recommending the BATT for waste LABs. First the evaluation indicators were selected based on the analysis of main factors affecting the pollution control of waste LAB treatment. The relative weights of each indicator were determined via the Delphi-attribute hierarchy model (AHM) in the second step. To determine the BATT, the attributive mathematics theory was adopted to calculate the attribute measure of single and multiple indices. Then, five recycling technologies commonly used in the secondary lead industry were estimated using the proposed evaluation system, and the feasibility of the recommended BATT was preliminarily verified. The results indicated that mixed smelting technology (MST), pre-desulfurization and multi-chamber smelting technology (PD-MCST), and direct smelting technology (DST) were found to perform well and were therefore deemed optimal for waste LAB disposal at this stage. The validation study showed that the DST can meet the requirements of pollution control, which is consistent with the evaluation results.

Intraoperative hearing evaluation during tympanoplasty – surgical technique and measurement method using OssiMon LAIOM system

2018 ◽  
Vol 7 (3) ◽  
pp. 1-8
Author(s):  
Kazimierz Niemczyk ◽  
Krzysztof Morawski ◽  
Rafael Delgado ◽  
Maria Małkowska ◽  
Robert Bartoszewicz ◽  
...  
Keyword(s):  
Surgical Technique ◽  
Evaluation System ◽  
Single Point ◽  
Hearing Level ◽  
Functional Evaluation ◽  
Steady State Response ◽  
Functional Effect ◽  
State Response ◽  
Auditory Steady State Response ◽  
Hearing System

We present a surgical technique of closed tympanoplasty for chronic otitis, together with an intraoperative functional evaluation system with the OssiMon LAIOM software. The technique can be used in one or two steps for an intraoperative evaluation of the functional effect during ear operation. Using OssiMon LAIOM, we were able to simultaneously measure the auditory steady-state response (ASSR), as well as to perform laser dopler vibrometry (LDV). For electrophysiologic measurements, OssiMon LAIOM uses the Intelligent Hearing System platform, and the Polytec single-point laser to evaluate the ossicular mobility. The measurements can be conducted using both methods at the same time or separately, applying each method independently. The OssiMon LAIOM software records the ASSR response intraoperatively and marks it automatically on the audiogram with the preoperative hearing level. The ossicular vibration level is determined based on the measured LDV response. To the best of our knowledge, OssiMon LAIOM is the first solution allowing to objectively measure the effectiveness of tympanoplasty using two methods simultaneously, i.e. ASSR and LDV. The system could be widely applied in the functional evaluation of the middle ear and in clinical practice.

Using Yeast to Treat Soybean Wastewater and Realize Resource Recovery

2014 ◽  
Vol 675-677 ◽  
pp. 733-737 ◽  
Author(s):  
Hai Feng Lu ◽  
Guang Ming Zhang ◽  
Jing Jing Zhou
Keyword(s):  
Candida Utilis ◽  
Hydraulic Retention Time ◽  
Ph Value ◽  
Optimal Conditions ◽  
Critical Factors ◽  
High Concentration ◽  
Treatment Technology ◽  
Rotating Speed ◽  
Factors Influencing ◽  
Yeast Wastewater

Soybean wastewater is a kind of nutrients wastewater. Using yeast to treat this kind of wastewater can not only degrade high concentration organic pollutants, but the yeast cell itself also can be harvest and realize the resources recycling. In this work, the feasibility and the optimal conditions of using yeast to treat soybean wastewater were investigated. Results showed that the initial COD and hydraulic retention time were the critical factors influencing COD degradation. Under 28 °C and with the initial soybean wastewater of 4800 mg/L, usingCandida utiliswith 20% of inoculums dosage could realize the higher reduction of the concentration of COD. And after 18 h’s treatment with rotating speed of 160 rpm, the COD removal could reach to 90%. The yeast wastewater treatment technology has the prospect of resources recycling. Besides, the pH value is very important for yeast to treat soybean wastewater.

scholarly journals The Potential Relationship Between Leg Bone Length and Running Performance in Well‐Trained Endurance Runners

2019 ◽  
Vol 70 (1) ◽  
pp. 165-172 ◽  
Author(s):  
Hiromasa Ueno ◽  
Tadashi Suga ◽  
Kenji Takao ◽  
Yuto Miyake ◽  
Masafumi Terada ◽  
...  
Keyword(s):  
Body Height ◽  
Lower Leg ◽  
Resonance Imaging ◽  
Running Performance ◽  
Race Time ◽  
Tibial Length ◽  
Bone Length ◽  
Endurance Runners ◽  
The Relationship ◽  
Leg Bones

Abstract The present study aimed to determine the relationship between leg bone length and running performance in well-trained endurance runners. The lengths of the leg bones in 42 male endurance runners (age: 20.0 ± 1.0 years, body height: 169.6 ± 5.6 cm, body mass: 56.4 ± 5.1 kg, personal best 5000-m race time: 14 min 59 s ± 28 s) were measured using magnetic resonance imaging. The lengths of the femur and tibia were calculated to assess the upper and lower leg lengths, respectively. The total length of the femur + tibia was calculated to assess the overall leg bone length. These lengths of the leg bones were normalized with body height, which was measured using a stadiometer to minimize differences in body size among participants. The relative tibial length was significantly correlated with personal best 5000-m race time (r = -0.328, p = 0.034). Moreover, a trend towards significance was observed in the relative femoral length (r = -0.301, p = 0.053). Furthermore, the relative total lengths of the femur + tibia were significantly correlated with personal best 5000-m race time (r = -0.353, p < 0.05). These findings suggest that although the relationship between the leg bone length and personal best 5000-m race time was relatively minor, the leg bone length, especially of the tibia, may be a potential morphological factor for achieving superior running performance in well-trained endurance runners.

scholarly journals Thermal power treatment of step shafts

2019 ◽  
Vol 298 ◽  
pp. 00034
Author(s):  
Alexander V. Bobrowskii ◽  
Oleg I. Drachev ◽  
Igor V. Turbin ◽  
Vyacheslav E. Epishkin
Keyword(s):  
Thermal Power ◽  
Residual Deformation ◽  
Deformation Analysis ◽  
Optimal Conditions ◽  
Treatment Technology ◽  
Product Use

This article reviews the design of thermal power units for performing thermal operations of hardening and tempering of non-rigid parts of the “shaft” type. The authors describe the thermal power treatment technology, the residual deformation analysis and the optimal conditions definition. The units operation principles and algorithms are given. The developed technology and the design of the frame for thermal operations make it possible to maintain accuracy throughout the term of the product use.

scholarly journals Are short forms of Barthel Index equally useful in assessment of ADL?

2018 ◽  
Vol 22 (2) ◽  
pp. 40-44 ◽  
Author(s):  
Józef Opara
Keyword(s):  
Activities Of Daily Living ◽  
Barthel Index ◽  
Daily Living ◽  
Functional Evaluation ◽  
Review Of The Literature ◽  
Advantages And Disadvantages ◽  
Short Forms ◽  
Results Of Treatment ◽  
Self Reliance ◽  
Barthel Score

It has been more than 50 years ago, when in 1965 Florence Mahoney and Dorothea Barthel published an article entitled "Functional evaluation: the Barthel Index." Since then, Barthel scale, also known as a Basic ADL Index (BI), Barthel Score and Maryland Disability Index, is one of the most well-known scales ADL (Activities of Daily Living) and is still popular. This simple scale is still used by the representatives of a number of medical workers for many pur-poses, including the assessment of the results of treatment, rehabilitation, prognosing, assess-ment of self-reliance, assessment of needs for care and for the purposes of the judgment. De-spite its simplicity, the administration of the original Barthel questionnaire takes about 5-10 minutes; that`s why there is a demand for a shortened form of BI. Based on a review of the literature the advantages and disadvantages of the abbreviated BI versions in assessing activities of daily living has been presented. Key Words ADL, Barthel Index, Barthel scale, clinimetrics, short forms Opara J. Are short forms of Barthel Index equally useful in the assessment of ADL? Med Rehabil 2018; 22(2): 40-44. DOI: 10.5604/01.3001.0012.6932

scholarly journals Mathematical modeling of the osteosynthesis of the lower leg bones using a titanium mesh for their congenital pseudoarthrosis in the lower third

TRAUMA ◽  
2021 ◽  
Vol 22 (4) ◽  
pp. 23-29
Author(s):  
S.O. Khmyzov ◽  
E.S. Katsalap ◽  
M.Yu. Karpinsky ◽  
O.V. Yaresko
Keyword(s):  
Bone Graft ◽  
Strain State ◽  
Lower Leg ◽  
Control Points ◽  
Titanium Mesh ◽  
Non Union ◽  
Congenital Pseudarthrosis ◽  
Almost All ◽  
Leg Bones ◽  
Additional Fixation

Background. Congenital pseudarthrosis of the lower leg bones belongs to the group of orphan diseases and manifests itself in non-union (pseudarthrosis) of the lower leg bones, which leads to the formation of deformity and shortening of the limb, and, as a result, is accompanied by a persistent violation of the limb’s supportability. To date, the question of choosing a surgical technique and optimal fixation in the surgical treatment of congenital pseudarthrosis of the lower leg bones remains unresolved. The purpose was to investigate the stress-strain state of the shin model with pseudarthrosis of its bones in the lower third during their osteosynthesis using a titanium mesh. Materials and methods. Osteosynthesis was simulated with an intramedullary nail, wires, and a block of bone grafts on both shin bones with the imposition of a titanium mesh over the grafts under the influence of two types of compression and torsion loads. Results. Studies have shown that additional fixation of the bone graft block with a titanium mesh allows reducing the stress level at almost all control points of the model of osteosynthesis of the lower leg bones in their congenital pseudarthrosis, both under compression and torsion. As the most positive changes, we can note a decrease in the stress values on the tibia around the nonunion line. This can be explained by the fact that the bone graft block reinforced with a titanium mesh takes on a great load. The same fact contributes to the increase in the level of stress at the lower border of the graft block and tibia. The negative factors include an increase in the level of stress along the line of non-union of the fibula. This is also explained by an increase in the modulus of elasticity of the bone graft block, which further loads the fibula. Conclusions. The use of a titanium mesh for additional fixation of the shin bones in the treatment of their congenital pseudarthrosis has a positive effect on the stress-strain state of the model, which is confirmed by a decrease in the stress level at almost all control points of the model, both under compression and torsion loads. The most positive changes are observed along the line of non-union of the tibia.

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