Wyniki wyszukiwania - BazTech

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Kinematic gait parameters changes in patients after total knee arthroplasty : Comparison between cruciate-retaining and posterior-substituting design

Hajduk G., Nowak K., Sobota G., Kusz D., Kopeć K., Błaszczak E., Cieliński Ł., Bacik B.

Acta of Bioengineering and Biomechanics

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2016

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Vol. 18, no. 3

137--142

EN

Purpose: The patients expect optimal knee function after Total Knee Arthroplasty. It is necessary to apply appropriate surgical technique and supervised physical therapy. The optimal management of posterior cruciate ligament remains controversial. Both implant designs, i.e., cruciate retaining and posterior substituting, allow the orthopedic surgeon to achieve excellent clinical outcomes, as measured by commonly used questionnaires. Such methods of assessment may poorly reflect the functional status of patients. Therefore, three-dimensional gait analysis is recommended to evaluate the outcomes of surgical intervention. This study sought to determine differences in kinematic gait parameters and Knee Society Score between cruciate-retaining and posterior-substituting patients. Methods:23 individuals after cruciate-retaining total knee arthroplasty and 19 individuals after posterior-substituting total knee arthroplasty were subjected to gait analysis using three-dimensional motion capture system BTS Smart DX 7000. In addition, gait was assessed in 21 patients with knee osteoarthritis and in 30 healthy individuals. Results: The study did not reveal differences between cruciate-retaining and posterior-substituting groups, both in terms of Knee Society Score and kinematic gait parameters. There were also no differences in kinematic gait parameters between patients from the knee osteoarthritis group and total knee arthroplasty groups. The analyzed parameters in all of the groups differed significantly from those found in healthy individuals. Conclusions: Surgical technique and implant design do not affect values of kinematic gait parameters evaluated under natural walking speed. Several months after surgery the patients still demonstrated alterations in gait pattern, similar to those recorded in patients with knee osteoarthritis.

2

The effect of short- and long-term vibration training on postural stability in men

Piecha M., Król P., Juras G., Sobota G., Polak A., Bacik B.

Acta of Bioengineering and Biomechanics

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2013

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Vol. 15, no. 3

29--35

EN

The study aimed to establish the short- and long-term effects of vibration on postural stability in young men. A single set of exercises and a 4-week vibration training were assessed for their impact on the center of foot pressure (COP) sway. The sample consisted of 49 male subjects randomly allocated to seven comparative groups, six of which exercised on a vibration platform whose parameters were set individually for the groups. Group VII was the control group. The stabilographic signal was recorded before the test commenced, after a single application of vibration, before the last set of exercises of the 4-week vibration training, immediately afterwards, as well as one week and one month after the training ended. The subjects were exposed to vibration 3 times a week for 4 weeks. Both a single application of vibration and the 4-week vibration training had an effect on all parameter values, but most changes were statistically insignificant. Group III was the only one where the COP sway in the anterior-posterior direction significantly increased after a single exposure to vibration and significantly decreased in both anterior-posterior and medio-lateral planes one week after vibration training compared with the pre-test recordings.

3

The dependence between clinical condition and value of the maximum force in the quadriceps femoris muscle during MVC test in patients with knee osteoarthritis

Nowak K., Sobota G., Bacik B., Hajduk G., Kusz D.

Acta of Bioengineering and Biomechanics

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2012

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Vol. 14, no. 3

23-27

EN

The aim of this study was to check whether there was a correlation between the value of the maximum developed torque of the quadriceps femoris muscle and subjective evaluation of a patient's pain which is measured by the VAS. Also evaluated were changes in the muscle torque value and KSS scale over time. For examining patient's condition use was made of a KSS scale (knee score: pain, range of motion, stability of joint and limb axis) before the surgery and in weeks 6 and 12, as well as 6 months after surgery. It was found to be constantly improving in comparison with the condition before the surgery. This is confirmed by a significant statistical value difference of KSS scale. The surgery substantially increases the quality of live and function recurrence.

4

Wpływ zmęczenia na wartość sygnału bioelektrycznego w teście MVC u pacjentów z gonartrozą

Nowak K., Sobota G., Hajduk G., Bacik B., Kusz D.

Aktualne Problemy Biomechaniki

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2010

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z. 4

143--146

PL

Celem pracy była ocena zmian amplitudy sygnału bioelektrycznego mięśnia czworogłowego uda, rejestrowanego podczas maksymalnego skurczu izometrycznego {maximum voluntary contraction - MVC) przed i po serii testów funkcjonalnych. Badaniu poddano 22 osoby zakwalifikowane do zabiegu endoplastyki stawu kolanowego. Zaobserwowano wzrost wartości amplitudy sygnału bioelektrycznego poszczególnych głów mięśnia czworogłowego podczas maksymalnego skurczu izometrycznego (MVC) po wykonanych testach funkcjonalnych. Mogłoby to świadczyć o zmęczeniu mięśnia i konieczności uwzględnienia tego efektu w procedurach normalizacji zapisu EMG oraz podczas interpretacji wyników lub modyfikacji metodyki prowadzonych testów funkcjonalnych.

EN

The aim of this paper was the evaluation of the change of the bioelectrical signal amplitude of the guadriceps femoris muscle traffic recorded during the maximal voluntary isometric contraction (MVC test) before and after functional tests are conducted, which could influence the analysis and interpretation of the normalized bioelectrical signal. The research was conducted at the Orthopaedics and Musculoskeletal Traumatology Department at the, Silesian Medical University in Katowice. Twenty-two people with gonarthrosis underwent the clinical evaluation and were qualifited for the endoplastic surgery. The EMG was used register the tension of the quadriceps femoris muscle MyoTrace (Noraxon, USA). It has been observed, the amplitude value executed after the functional test increase statiscially with respect of the conducted. However, not all of the examinet quadriceps femoris muscle showed significant differences. It could prove the muscle’s fatigue and the necesity of considering this effect in the normalization procedures of EMG as well as during the interpretation of the results all the modification of the methodology of the conduction functional tests.

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Influence of stretching exercises on viscoelastic charactenstics in control of stable standing posture

Bacik B., Plewa M., Sulicz E., Sobota G.

Zeszyty Naukowe Katedry Mechaniki Stosowanej / Politechnika Śląska

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2006

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z. 26

25-28

EN

The model of control of body sway movements in quiet standing proposed by Winter (1998) predicts the role of passive control resulting from stiffness of ankle joint muscles. The objective of the present study was to evaluate if exercises of muscle contract-stretch type performed in particular joints of lower extremities and lumbo-pelvic-hip region would result in change of postural stiffness and of the remaining characteristics of viscoelastic model in control of quiet standing. The study group consisted of 14 men. The subjects were performing stretching exercises affecting the muscles of ankle, knee and hip joints as well as lumbo-pelvic-hip complex. Exercise sessions were preceded by 10-second stabilographic measurements in quiet standing with eyes closed. Out of all evaluated parameters only postural stiffness changed considerably and only after the stretching of lumbo-pelvic-hip complex.

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Badania modelowe i doświadczalne ruchu kończyny dolnej człowieka

Tejszerska D., Michnik R., Jureczko P., Jurkoić J., Bacik B.

Zeszyty Naukowe Katedry Mechaniki Stosowanej / Politechnika Śląska

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2000

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nr 13

335-340

PL

W pracy przedstawiono model matematyczny ruchu kończyn dolnych człowieka. Zastosowany aparat matematyczny, w ramach zagadnienia odwrotnego dynamiki pozwala na wyznaczenie reakcji w stawach i momentów sił mięśniowych przy zadanych przebiegach parametrów kinematycznych poszczególnych stawów oraz reakcji podłoża. Założono, że ruch kończyny dolnej jest ruchem płaskim, układ kończyny dolnej traktuje się jako zespół sztywnych członów połączonych przegubowo stawami. W modelu uwzględniono siły ciężkości, siły bezwładności i momenty bezwładności, reakcje w stawach, momenty sił mięśniowych, reakcje podłoża

EN

In the paper the mathematical model of lower limbs motion is presented. The application of the inverse dynamic problem enables evaluation of reactions in joints and moments of muscular forces when the course of kinematic parameters of each joint and reaction of base are given. It is assumed that the movement of the lower limb is planar and the lower limb is treated as a set of the rigid elements joined together by joints. In this model the gravity forces, inertial forces, moments of inertia, reactions in joints, moments of muscular forces and reactions of base are taken into account.