Recidyvų vertinimas po hallux valgus korekcijos Lapidus operacijos ir Z-osteotomijos metodais

Tirti pacientai, dėl hallux valgus patologijos operuoti Respublikinėje Vilniaus universitetinėje ligoninėje 2006–2008 metais, atliekant Z-osteotomiją arba Lapidus operaciją: 70 pacientų (4 vyrai, 66 moterys), kuriems buvo operuota 80 pėdų (4 – vyrų, 76 – moterų) – po 40 atvejų abiejų operacijos tipų. Tirtų pacientų priešoperaciniai patologijos kriterijai buvo identiški ir sutapo svarbiausias indikacijų parametras – kampas tarp pirmo ir antro padikaulių (IMT1) buvo 16°–23°. Darbo tikslas – palyginti šių grupių recidyvų skaičių. Palyginus grupių pooperacinius rezultatus paaiškėjo, kad recidyvų skaičius vertinant tiek HV kampą, tiek IMT1 kampą po Z-osteotomijos yra mažesnis. Kadangi Z-osteotomija yra mažesnės apimties operacija ir techniškai paprastesnė, o pooperacinis laikotarpis trumpesnis, esant IMT1 kampui 16°–23°, ši operacija turėtų būti pasirenkama pirmiausiai. MTC1 sąnario artrodezė neapsaugo nuo hallux valgus deformacijos.Assessment of relapse after halux valgus Lapidus correction surgery and Z-osteotomy techniques The aim of this study was to compare the number of relapses in two analogous groups after hallux valgus correction surgery by the Lapidus and Z-osteotomy techniques. The study included 70 patients (4 men, 66 women), who met the inclusion criteria. In total, 80 feet were analyzed (4 males and 76 female), i. e. two comparable groups of 40 feet. The postoperative results showed that the number of relapses as regards both the hallus valgus and the IMT1 angles was less after Z-osteotomy

Rezultatų vertinimas po hallux valgus korekcijos Lapidus operacijos ir Z-osteotomijos metodais

BackgroundTo evaluate the number of complications and patients` satisfaction after hallux valgus deformity correction using the Lapidus procedure and Z-osteotomy.Matherials and methodsSeventy patients (mean age 51.9 years; 4 men and 66 women) who underwent hallux valgus deformity correction using the Lapidus procedure (L group) or Z-osteotomy (Z group), were studied not less than 2 years after the operation. Before the operation, all patients had a 16–23° angle between the first and the second metatarsals. Physical examination, MTP1 jointamplitude measurement and X-rays of operated feet were performed. Also, patients were asked about the postoperative complications. To evaluate the satisfaction of patients, the visual analog scale (VAS) was used.ResultsThe studied patients (4 male and 76 female) had 80 operated feet; 40 (50%) operations were performed using the Lapidus procedure and 40 (50%) Z-osteotomy. In 61% of cases, there was at least one complication. The frequency of complications did not differ in the groups (p > 0.05). Cases of MTP1 arthrosis were similar in both groups (p > 0.05).There was a correlationbetween patients` satisfaction after operation and the number of complications, r = 0.44 (p < 0.05).ConclusionsPatients’ satisfaction after operation correlates with the number of complications. There was no difference between patients`satisfaction after operation and the frequency of complications after the Lapidus procedure and Z-osteotomy. Įvadas / tikslasPalyginti komplikacijų skaičių bei ligonių pasitenkinimą turimais rezultatais po hallux valgus patologijos korekcijos Lapidus operacijos ir Z-osteotomijos metodais.Pacientai ir metodaiTirta 70 pacientų (amžiaus vidurkis 51,9 metų; 4 vyrai ir 66 moterys), kuriems VšĮ RVUL 2006–2008 metais operuota hallux valgus patologija atliekant Lapidus operaciją (L grupė) arba Z-osteotomiją (Z grupė). Visų pacientų kampas tarp pirmo ir antro padikaulio prieš operaciją buvo 16–23°. Rezultatai vertinti praėjus ne mažiau kaip dvejiems metams po operacijos. Apžiūros metu pacientai buvo klausiami apie atsiradusias komplikacijas, atliktas fizinis ištyrimas, matuota MTP1 sąnario judesių amplitudė, atlikta ir įvertinta operuotos pėdos rentgenograma. Pasitenkinimui įvertinti naudota vizualinė analogijų skalė (VAS).RezultataiIš viso tirtiems pacientams buvo išoperuota 80 pėdų (4 vyrų, 76 moterų). Atlikta po 40 (50 %) abiejų tipų operacijų. 61 % atveju po operacijos buvo bent viena komplikacija. Komplikacijų dažnumas nesiskyrė abejose grupėse (p>0,05). MTP1 artrozės išsivystymo atvejai abiejų grupių buvo panašūs (p>0,05). Nustatyta koreliacija tarp pacientų pasitenkinimo operacijos rezultatu ir komplikacijų skaičiaus, r=0,44 (p<0,05).IšvadosPacientų pasitenkinimas koreliuoja su komplikacijų skaičiumi. Komplikacijų pasiskirstymas ir pacientų pasitenkinimas po Lapidus operacijos ir Z-osteotomijos nesiskyrė. Vadinasi, šiais aspektais abu metodai lygiaverčiai

Potential representation method for the Schrödinger equation

A general solution of the Schrödinger equation in the potential representation has been obtained in the form of integral equations. In this representation, the wave function for positive and negative energies or bound states can be expressed as a product of the unperturbed solution for model potential and the function which depends on the additional potential or potential perturbation. Here we have proved that this method is equivalent to the method of variation of constants for negative energies. The linearly independent solutions of Schrödinger equation for harmonic oscillator potential have been obtained for derivation of integral equations, which are used for finding eigenfunctions and eigenvalues for Woods–Saxon potential. Eigenvalues obtained by numerical iterations of these integral equations are in good agreement with results obtained by the discretization method. The kernels of the obtained integral equations are proportional to the perturbation or difference of Woods–Saxon and harmonic oscillator potentials

Miokardo reperfuzijos adekvatumo po pirminės perkutaninės transliuminės vainikinių arterijų angioplastikos ir stentavimo palyginimas

Edvardas Vaicekavičius, Virgilijus Grinius, Ramūnas Navickas, Ramūnas Unikas, Arnoldas JanavičiusKaunas University of Medicine, Institute of CardiologyE-mail: [email protected] Background / objective Reperfusion may limit the amount of potentially salvageable ischemic but viable myocardium due to reperfusion damage and injury. The objective of this study was to compare primary percutaneous transluminal coronary angioplasty (PTCA) with stenting according myocardial reperfusion quality in early hospital period. Methods One hundred nineteen patients presenting with acute myocardial infarction < 12 hours were treated by primary PTCA or stenting (n = 26). PTCA patients (n = 93) were divided in to 1st group (n = 75) of survived and 2nd group (n = 18) of died patients. Stented patients consisted 3rd gr. (n = 26). The main indications for stenting after angioplasty were: 1) significant (type D, E, or F) dissection of coronary arteries, 2) significant elastic recoil. Peri-procedural TIMI flow, resolution of ST elevation and evolution of ECG stages were used for assessment of reperfusion quality. QRS score and left ventricle EF were used for assessment of LV function. Results The highest TIMI flow, the most intensive resolution of ST, the evolution of ECG stages and the lowest QRS score were noticed for 3rd gr. of stented patients. The died patients (2nd gr.) had lower TIMI flow (p = 0,097472), higher ST (p = 0,0073) and lower EF (p = 0,0005) in comparing with the 1st gr. of patients. Conclusions The procedural in-hospital outcome demonstrate that coronary stenting can be used as the primary modality for patients undergoing coronary interventions for acute myocardial infarction, increasing TIMI flow myocardial, reducing reperfusion damage and infarct size. Keywords: myocardial infarct reperfusion, myocardial infarct size, primary percutaneous transluminal coronary angioplasty and stenting

The effect of cement modification on the rheological properties of cement paste

Experimental tests have determined the effect of slag, opoka (silica-calcite sedimentary rock), silica fume (SiO2) suspension, dolomite dust and sodium silicate solution (NaSS) together with the polycarboxylatether based plasticizing admixture on the yield stress and viscosity of Portland cement paste the rheological properties of which have been defined applying a rotational viscometer with co-axial cylinders. The tests have revealed that slag, opoka, silica fume suspension and dolomite dust added to cement paste by replacing 10% of Portland cement (by weight) have an effect on the yield stress and viscosity of the paste subject to the form and fineness of additive particles. When 10wt% of Portland cement is replaced with slag cement, the yield stress of Portland cement paste reduces by about 25.9%, and viscosity increases by about 3.5 times compared with the yield stress and viscosity of reference cement paste. The yield stress of Portland cement paste with 0.5% NaSS admixture increases insignificantly, and viscosity grows approximately twice compared with reference cement paste. The tests have also showed that the modifying admixtures of Portland cement paste enable to control the rheological properties of cement paste

Miokardo reperfuzijos adekvatumo po pirminės perkutaninės transliuminės vainikinių arterijų angioplastikos ir stentavimo palyginimas

Edvardas Vaicekavičius, Virgilijus Grinius, Ramūnas Navickas, Ramūnas Unikas, Arnoldas JanavičiusKaunas University of Medicine, Institute of CardiologyE-mail: [email protected] Background / objective Reperfusion may limit the amount of potentially salvageable ischemic but viable myocardium due to reperfusion damage and injury. The objective of this study was to compare primary percutaneous transluminal coronary angioplasty (PTCA) with stenting according myocardial reperfusion quality in early hospital period. Methods One hundred nineteen patients presenting with acute myocardial infarction < 12 hours were treated by primary PTCA or stenting (n = 26). PTCA patients (n = 93) were divided in to 1st group (n = 75) of survived and 2nd group (n = 18) of died patients. Stented patients consisted 3rd gr. (n = 26). The main indications for stenting after angioplasty were: 1) significant (type D, E, or F) dissection of coronary arteries, 2) significant elastic recoil. Peri-procedural TIMI flow, resolution of ST elevation and evolution of ECG stages were used for assessment of reperfusion quality. QRS score and left ventricle EF were used for assessment of LV function. Results The highest TIMI flow, the most intensive resolution of ST, the evolution of ECG stages and the lowest QRS score were noticed for 3rd gr. of stented patients. The died patients (2nd gr.) had lower TIMI flow (p = 0,097472), higher ST (p = 0,0073) and lower EF (p = 0,0005) in comparing with the 1st gr. of patients. Conclusions The procedural in-hospital outcome demonstrate that coronary stenting can be used as the primary modality for patients undergoing coronary interventions for acute myocardial infarction, increasing TIMI flow myocardial, reducing reperfusion damage and infarct size. Keywords: myocardial infarct reperfusion, myocardial infarct size, primary percutaneous transluminal coronary angioplasty and stenting

Nonlinear Many-Staged Diffusion

We considered and solved the nonlinear diffusion equation formerly. The more complicated but more useful task of many-staged diffusion is solved in this paper. The obtained solution satisfies the initial distribution of the impurities and can be generalized for many-staged diffusion. Using these solutions we can take into account all the stages of a planary transistor formation

Optical information storage in defected photonic crystal

We have studied inverse opal optical properties. Defects, action on photonic band gab position was discussed. We showed that defect gives us possibility to control light flow in photonic crystal.Švietimo akademijaVytauto Didžiojo universiteta