Cíl studie: Cílem studie bylo zjištění vztahů mezi manifestací tinnitu, nálezem na sluchových evokovaných potenciálech a genetickým pozadím u receptoru pro gamaaminomáselnou kyselinu typu A (GABA(A) receptor), podporující desinhibiční hypotézu vzniku tinnitu. Soubor a metodika: Bylo vyšetřeno 131 pacientů z hlediska sluchové ztráty, provedena kvantifikace tinnitu, sluchové evokované potenciály střední latence (MLR) a kmenové sluchové evokované potenciály (BAEP) a dále stanovení genotypu (CA)n repetitivní sekvence pro beta‑3 podjednotku GABA(A) receptoru. Následně byly hledány vztahy mezi jednotlivými výsledky a manifestací tinnitu. Výsledky: Byla nalezena korelace tinnitus skóre s amplitudovým poměrem vln V/III v BAEP (R = 0,22, p < 0,001) a s průměrným sluchovým prahem (R = 0,22, p = 0,17). Rovněž byla nalezena korelace tinnitus skóre s amplitudou vlny PA v MLR (R = 0,31–0,37; p < 0,001). Výsledky MLR neukázaly žádný vztah k průměrnému sluchovému prahu. U skupiny s kratší anamnézou tinnitu (méně než devět měsíců) byl prokázán rozdíl v manifestaci tinnitu na genotypu pro (CA)n repetitivní sekvenci genu pro beta‑3 podjednotku GABA(A) receptoru (p = 0,002). Tento výsledek byl rovněž konzistentní s rozložením amplitudy vlny PA v dané subpopulaci. Závěr: Tyto výsledky svědčí o existenci dvou hlavních regulačních mechanizmů vzniku tinnitu: první, který je závislý na velikosti sluchové ztráty, je na úrovni mozkového kmene, zatímco druhý je na úrovni korové s možnou souvislostí s genotypem (CA)n repetitivní sekvence pro beta‑3 podjednotku GABA(A) receptoru., Study aim:Study objective was to explore associations between manifestation of tinnitus, auditory evoked potentials and genetic background of gamma‑aminobutyric acid type A (GABA(A) receptors) to support the disinhibited feedback hypothesis of tinnitus generation. Materials and methods: A population of 131 patients was assessed for severity of hearing loss, quantification of tinnitus, mid‑latency responses (MLR) and brainstem auditory evoked potentials (BAEP), and (CA)n tandem repeat polymorphism in GABA(A) Beta‑3 subunit gene to establish any correlation with manifestation of tinnitus. Results: It was observed that tinnitus score correlates with V/III amplitude ratio in BAEP (R = 0.22, p < 0.001) and with mean pure tone audiometry (PTA) threshold (R = 0.22, p = 0.017). Analysis of the MLR results showed a significant correlation between the PA wave amplitude and the tinnitus score (R = 0.31–0.37; p < 0.001). MLR result analysis showed no statistically significant correlation between the wave amplitudes and the mean auditory threshold. An analysis of a subgroup with shorter clinical history (less than nine months) revealed a statistically significant difference in the tinnitus score in relation to the genotype of (CA)n tandem repeat of the GABRß3 receptor subunit gene (p = 0.002). This result was also consistent with the distribution of the PA wave amplitude in the given subpopulation. Conclusion: Our findings indicate existence of two main regulatory mechanisms of tinnitus generation: first, the brainstem mechanism is dependent on the severity of the hearing loss; second, the cortical mechanism is likely to be dependent on the genotype of (CA)n tandem repeat in GABA(A) beta‑3 subunit gene., and J. Rottenberg, M. Zallmann, R. Kostrica, M. Jurajda, T. Talach
BACKGROUND: The presence of several risk factors (genetic and non-genetic) has greater impact on the risk of premature coronary artery disease (CAD) than single risk factor. OBJECTIVE: The aim of the study was to establish possible relations between genotypes and alleles of 677C>T polymorphism of MTHFR gene and some traditional risk factors e.g. elevated levels of lipid parameters and smoking in development of premature CAD. METHODS: The groups comprised 152 patients with angiographically documented premature CAD (aged 42.9 +/- 5.5) and 121 age-matched blood donors (aged 42.3 +/- 6.5) were studied. The MTHFR 677C>T polymorphism was genotyped with Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR-RFLP) method. RESULTS: Patients with TT genotype who simultaneously smoked had increased risk of premature CAD compared to non-smoking cases with CC genotype (OR = 24.62). We also found that individuals with TT genotype and elevated LDL-cholesterol (LDL-chol.) level had significantly higher risk of CAD (OR = 9.92) than individuals with normal LDL-chol. level and CC genotype. CONCLUSIONS: The present study shows that simultaneous presence of MTHFR TT genotype and smoking or elevated levels of LDL-chol. influences the risk of premature CAD. This findings give interesting contribution to gene-environment interaction problem that may have clinical implications in the future. and B. Sarecka-Hujar, I. Zak, J. Krauze
Aim: The aim of this paper is to develop an evidence-based clinical protocol for the use of gum chewing in postoperative care to reduce the risk of paralytic postoperative ileus in patients who have undergone abdominal surgery. Methods: A clinical question (For adult patients who have undergone abdominal surgery, does the use of gum chewing postoperatively reduce the risk of paralytic postoperative ileus in comparison with the usual care regimen?) was formulated, a population and setting were defined, and the databases OVID Medline®, CINAHL, and PubMed were searched for relevant material. Six data-based research articles were chosen for review: four randomized controlled trials and two meta-analyses. Finally, the articles were critically appraised to generate evidence on which to base the clinical protocol. Results: The development team created a detailed description of the clinical protocol as well as a protocol algorithm to assist clinicians in determining patient eligibility. In addition, protocol implementation and evaluation plans were proposed. Conclusion: An evidence-based clinical protocol was developed to provide a template for identification of patients eligible for gum chewing, implementation, and evaluation of this intervention to reduce the risk of paralytic postoperative ileus after abdominal surgery., Renáta Zeleníková, Anthony Chao, Gloria Enright, Mary Rogers Schubert, Kaitlin Shotsberger, Cecelia Wise, Elizabeth A. Schlenk, and Literatura
INTRODUCTION: The aim of this study was to find out the impact of degradation and regeneration of force over time at NiTi springs on the value and course of the final acting force and to verify the possibility of using these phenomena for a directed transition to the reverse plateau and its maintaining. METHODS: Static and cyclic mechanical loadings were performed. At first unused springs were tested. Afterwards the springs were mechanically stabilized by stress cycling and finally tested again. The difference in shape of the working curves was assessed. For simulation and description of the force degradation the modified Voight model was used. RESULTS: New springs, mainly those with large hysteresis, showed a significant stress-strain curve movement and shape changes during the cycling. The effect of the stress-strain curve course change disappeared fully in the stabilized springs. Multiple loading led to an overall decrease of force value during the measurement. The effect of force degradation and regeneration over time by simple static loading varies in the range of percentage of the nominal force in the plateau area. The transition between stress-strain curve phases caused by the degradation or regeneration of the force wasn't observed in case of mechanically stabilized springs. CONCLUSIONS: Springs should be mechanically stabilized before their application. The degree of force degradation over time is insignificant for mechanically stabilized springs. Degradation or regeneration of force over time, mechanical stabilization or micromovements in the mouth don't cause any transition between individual stress-strain curve phases. and A. Bezrouk, L. Balský, M. Smutný, T. Nosek, J. Záhora, J. Hanus, R. Polma
Článek nabízí několik tipů a triků, které by měly napomoci v procesu psaní přesvědčivého a čtivého rukopisu. S pomocí webových stránek zmiňovaných v článku, by měl být proces psaní vědeckého článku jednodušší, zejména pro nezkušené autory., In this manuscript some writing tips and tricks are offered which can be of help in the process of creating a convincing and readable manuscript. The process of writing a manuscript itself should become easier, in particular for the inexperienced writer, with help of the websites mentioned in this article., and Assoc. Prof. Jitse P. van Dijk MD PhD
Cardiac surgery is inseparably linked to the activation of innate immunity cells recognizing danger signals of both endogenous and exogenous origin via pattern recognition receptors such as TLR receptors. Therefore, we followed by flow cytometry TLR2 and TLR4 expression on blood monocytes and granulocytes of patients who underwent coronary artery bypass grafting using beating heart surgery (off-pump, n = 34), with use of standard cardiopulmonary bypass (CPB), (on-pump, n = 30), and miniinvasive CPB (mini on-pump, n = 25), respectively, before, during surgery, and up to 7th postoperative day. TLR2 and TLR4 expression both on monocytes and granulocytes was significantly diminished already at the end of CPB being highly significantly decreased at the end of surgery in all patients' groups. TLR2 and TLR4 expression reached preoperative value at the 1st postoperative day being significantly higher at the 3rd postoperative day. Using intracellular staining we found the peak of TLR2 and TLR4 expression inside of monocytes and granulocytes at the first postoperative day in a subgroup of on-pump patients. In conclusion, TLR2 and TLR4 expression is significantly modulated in patients undergoing coronary artery bypass grafting as a part of adaptive homeostatic mechanisms induced by major surgery. The very surgical trauma is responsible for TLR2 and TLR4 modulation. Surprisingly, cardiopulmonary bypass itself was little contributing to the modulation of TLR2 and TLR4 expression. and J. Krejsek, M. Kolácková, J. Mand'ák, P. Kunes, Z. Holubcová, D. Holmannová, M. AbuAttieh, C. Andrýs
Kontinuální tvorba výpotků jakékoliv etiologie zásadním způsobem ovlivňuje kvalitu života nemocných. Akumulace tekutiny v pleurální dutině postupně komprimuje plicní parenchym. Prvním příznakem bývá progrese námahové dušnosti, později se přidává i klidová dušnost. S nárůstem výpotku dochází ke kompresi plicního parenchymu s rozvojem plicní atelektázy. Nemocný je ohrožen vznikem zánětového onemocnění plic v nevzdušném plicním parenchymu. U diagnózy maligního onemocnění je riziko zánětových komplikací výrazně vyšší vzhledem k předchozí chemoterapii či radioterapii, která zásadním způsobem snižuje imunitu. Opakovaná tvorba výpotku se výrazně podílí na rozvoji terminálního stavu nádorové kachexie. Efektivní metodou léčby je chemická pleurodéza, která se užívá u vybraného spektra nemocných. Principem je navození aseptické pleuritidy. Nejefektivnější cestou aplikace léčiva je videotorakoskopie. V souboru bylo 47 nemocných, 29 (61,7 %) mužů a 18 (38,3 %) žen, s cytologicky prokázaným recidivujícím maligním pleurálním výpotkem. Věkové rozmezí 42–80 let, Ø věk 65 let. Cílem práce bylo objektivizovat průběh celkových a lokálních zánětových změn po talkáži. Efekt léčby nebyl ovlivněn základním typem nádorového onemocnění. U obou skupin nebyly významně odlišné pooperační komplikace, což dokládá bezpečnost zvolené metody a podporuje správně zvolený algoritmus léčby., Continuous pleural effusion production of any aetiology can significantly affect the quality of patients life. Chronic effusion accumulation in the pleural cavity can lead to lung parenchyma compression. The first symptom of this entity is a progressive exertional dyspnea, which can later turn in dyspnea at rest. With the increase of the pleural effusion volume, pulmonary atelectasis can develop due to chronic parenchycha compression. The patient is at risk of inflamatory complications from the territory of non-ventilated parenchyma. Patients with a diagnosis of malignant disease have this risk considerably higher due to their previous chemotherapy or radiation, which substantially affect the immunity system. Repeated pleural effusion formation can significantly take part in the development of the terminal status of cancer cachexia. An effective method of palliative treatment is a chemical pleurodesis, which is used in selected patients. The principle is inducing aseptic inflammation. The most effective way of application is via videothoracoscopy. In a group of 47 patients, there were 29 (61.7 %) men and 18 (38.3 %) women with cytologically diagnosed recurrent malignant pleural. The age ranged between 42 and 80 with average age of 65 years. The aim was to assess the course of local and systemic inflammatory changes after talc application. The effect of treatment was not influenced by the type of malignancy . In both groups there was no significant difference in postoperative complications. This proves the safety of the selected procedure and also supports the correctness of the chosen algorithm of treatment., Petr Habal, Nedal Omran, Karolina Jankovičová, Kateřina Kondělková, Jan Krejsek, Jiří Manďák, and Literatura
The aim of this study is to evaluate the results of total hip arthroplasty in patients with Parkinson's disease during a period of five years, focusing on the assessment of the risks and benefits of surgery. During this period we performed total hip arthroplasty in 14 patients (15 hips) with Parkinson's disease. Patients were evaluated by subjective symptoms and objective findings, with a focus on the use of support while walking and walking distance, severity of Parkinson's disease before surgery and at the time of the last follow-up. During the postoperative period, the following parameters were assessed: length of ICU stay, mobilization, complications, the total duration of hospitalization and follow-up care after discharge. Of the 11 patients (12 hips) followed-up 1-5 years with an average of 3 years after operation 8 cases showed progression of neurological disability. 5 patients (6 hips) showed an increased dependence on the use of support when walking and reduced distance that the patient was able to walk. Subjectively, 10 hip joints were completely painless and 2 patients complained of only occasional mild pain in the operated hip. Complications that were encountered were urinary tract infection (5 patients), cognitive impairment (3 patients) and pressure ulcer (2 patients). We did not observe any infection or dislocation of the prosthesis. Three patients fell and fractured the femur and 3 patients in our cohort died during follow up. Implantation of total replacement is possible with judicious indication after careful evaluation of neurological finding in patients with minimal or mild functional impairment of the locomotor system. Prerequisite for a good result is precise surgical technique and optimal implant position with balanced tension of the muscles and other soft tissues around the hip. and PG. Mathew, P. Sponer, T. Kucera, M. Grinac, J. Knízek
Úvod: Tato práce referuje první zkušenosti s laparoskopicky asistovanou transanální totální excizí mezorekta u pacientů s karcinomem středního a dolního rekta. Metody: V období od října 2013 do května 2014 bylo na dvou pracovištích (CHK FN Brno, CHO KOC Nový Jičín) operováno 17 pacientů technikou transanální totální mezorektální excize. V souboru bylo 11 mužů a 6 žen ve věku 49–81 let. Vzdálenost dolního okraje tumoru od análního okraje byla 30–80 mm, medián 60 mm. U všech pacientů byla konstruována ručně šitá kolo-anální anastomóza. Výsledek: U všech operovaných byl dosažen negativní distální resekční okraj. Cirkumferentní resekční okraj byl pozitivní ve dvou případech. Kvalita totální mezorektální excize byla hodnocena v 8 případech jako kompletní a v 9 případech jako téměř kompletní. Dehiscence kolo-anální anastomózy byla zaznamenána ve dvou případech (12 %). Operační čas se pohyboval v rozsahu 212–375 minut (medián 280 minut). Medián pooperační hospitalizace byl 9 dnů v rozsahu 6 až 30 dnů, v případě řešení anastomotické a rané komplikace. Závěr: Na základě prvních získaných zkušeností hodnotíme výkon jako realizovatelný a bezpečný v podmínkách našich chirurgických pracovišť s uspokojivými patologickými výsledky. Přesné indikace zatím nelze jednoznačně doporučit. Předpoklad je, že k transanální totální mezorektální excizi by měli být indikováni pacienti s nízce uloženým karcinomem rekta, event. s úzkou pánví, objemným mezorektem a objemnou prostatou., Introduction: First experiences with laparoscopic low anterior resection with transanal mesorectal excision in patients with low and mid rectal cancer are referred. Methods: During a 9 month period (between October 2013 and May 2014), 17 laparoscopically assisted rectal resections with transanal total mesorectal excision, hand-sewn colo-anal anastomosis and protective ileostomy were performed at two institutions (CHK FN Brno, CHO KOC Nový Jičín). There were 11 males and 6 females, with a mean age 68 years (range 49–81 years) in our cohort. The tumor was located 30–80mm from the anal verge (median 60 mm). Results: A negative distal resection margin was achieved in all patients. The circumferential resection margin was positive in two cases. The TME quality was described as complete in 8 cases and nearly complete in 9 cases. Mean operative time was 280 min (range 212–375 min) with no intra-operative complications. Anastomotic leakage was observed in two patients (12%). Median length of postoperative hospital stay was 9 days with a range of 6–30 days, in case of anastomotic and wound complications. Conclusion: According to our first experience we evaluated this method as feasible and safe with satisfactory pathological outcomes. We cannot recommend exact indications yet. It is assumed that the transanal approach for total mesorectal excision should be indicated in obese patients with a narrow pelvis and voluminous prostate., and V. Procházka, Z. Kala, M. Škrovina, T. Grolich, K. Klos
Transarteriální chemoembolizace (TACE) má v současnosti důležitou roli v managementu vybraných nádorů jater. Technikou provedení TÁCE zásadně nevybočuje od jiných embolizačních výkonů, nicméně kromě obecných se zde můžeme setkat s některými specifickými technickými problémy a komplikacemi. Mezi technické problémy patří technické obtíže při selektivní katetri-zaci (např. při přítomnosti odstupové stenózy či anatomických variant větvení truncus coeliacus nebo vinutosti a ostrých odstupů cílové tepny), vznik disekcí a spasmů, přítomnost extrahepatálního zásobení lézí či přítomnost arterioportálních nebo arteriovenózních zkratů. K nejčastějším specifickým komplikacím řadíme nežádoucí únik chemoembolizačního materiálu do necílových tepen zásobujících okolní orgány (žlučník, gastrodudoenum), vznik jaterních abscesů nebo rozvoj jaterního selhání. Znalost možných technických problémů a komplikací TACE a možností jejich předcházení může podstatně zlepšit prognózu pacientů indikovaných k tomuto výkonu., Transcathetral arterial chemoembolization of the liver (TACE) plays important role in management of selected liver tumours nowdays. The technique is similar to other embolization procedures, nevertheless besides general it is also associated with specific technical problems and complications. Technical problems are represented by technical difficulties of catheterization (stenosis, anatomical variants, etc.), occurence of dissections or spasms, presence of extra hepatic collateral supply and occurence of arterioportal or arterivenous shunts. Specific complications include nontarget embolization of arteries supplying surrounding organs (gallbladder, gastroduodenum), development of liver abscess or liver failure. The knowledge of potential complications and technical problems of TACE can significantly improve the outcome of patients indicated to this procedure., Jakub Hustý, Jaroslav Boudný, Vlastimil Válek, Tomáš Andrašina, and Literatura