Adhesive polymatroids were defined by F. Matúš motivated by entropy functions. Two polymatroids are adhesive if they can be glued together along their joint part in a modular way; and are one-adhesive, if one of them has a single point outside their intersection. It is shown that two polymatroids are one-adhesive if and only if two closely related polymatroids have joint extension. Using this result, adhesive polymatroid pairs on a five-element set are characterized., Laszlo Csirmaz., and Obsahuje bibliografické odkazy
Mitral allografts are still used only exceptionally in the mitral or tricuspid position. The main indication remains infectious endocarditis of atrioventricular valves for its flexibility and low risk of infection. The aim of our study was to evaluate 1-year results of mitral allografts transplantation into the tricuspid position in a sheep model. Mitral allografts were processed, cryopreserved, a nd transplanted into the tricuspid position anatomically (Group I - 11 animals) or antianatomically (Group II - 8 animals). All survivors (4 from Group I, and 3 from Group II) were checked at 3, 6, and 12 months by echocardiography with the exception of one survivor from Group II (which was examinated only visually). Examination throughout follow-up included for mitral allograft regurgitation and annuli dilatation. At postmortem, the papillary muscles were healed and firmly anchored to the right ventricular wall in all subjects. Transventricular fixation of the papillary muscles with buttressed sutures was proven to be a stable, reproducible, and safe method for anchoring mitral allograft leaflets. There were no significant differences between the two implan tation methods. Annulus support of mitral allografts might be very useful in this type of operation and could prevent annular dilatation., A. Mokracek, J. Canadyova, Z. Simunkova, R. Fiala, M. Hmirak, M. Sulda, J. Burkert, J. Tintera, P. Kobylka, J. Spatenka., and Obsahuje bibliografii
Karcinom penisu patří mezi řídce se vyskytující onemocnění, avšak s významnými psychosociálními následky. Postihuje muže převážně vyššího věku s maximem výskytu v šesté dekádě života. Etiologické a epidemiologické faktory jeho vzniku jsou poměrně dobře známy. Významnou roli při vzniku nádoru hraje infekce HPV, zejména typy HPV 16 a 18. Vzhledem k nízké incidenci karcinomu penisu kolem 1/100 000 osob jsou na většině urologických a onkologických pracovišť malé zkušenosti s jeho terapií. Neexistují žádné prospektivní randomizované studie o jeho léčbě. Literární soubory o chirurgické a další onkologické léčbě, jako je radioterapie a chemoterapie, se týkají obvykle jen několika desítek pacientů léčených během dlouhého období. Časná chirurgická léčba lokálního nálezu a případného uzlinového postižení hraje podstatnou roli ve vyléčení a prognóze pacienta. Nechirurgická léčba karcinomu penisu je v českém písemnictví málo publikována. V přehledovém článku je zdůrazněna nutnost přesné diagnózy a stagingu pro stratifi kaci pacientů do skupin ke vhodné léčbě podle rizika a prognostických faktorů. Dále je uveden pohled na současné možnosti a roli radioterapie a chemoterapie v léčbě karcinomu penisu. Stručně jsou také uvedeny vlastní zkušenosti s léčbou 25 pacientů ozářených pomocí HDR brachyterapie., Penile cancer is a rare tumour, however it has serious psychological and social consequences. The incidence of penile cancer increases with reaching with maximum in the sixth decade of life. The aetiological and epidemiological penile cancer risk factors are well recognized. Among them human papilloma virus infection, namely types HPV 16 and 18 is an important. Due to its low incidence about 1/100 000, there is limited experience with penile cancer therapy in most of urology or oncology departments. Randomised prospective studies are not available. Reports about surgical and other oncological therapy describe small studies with patients treated during long period. Early surgical treatment of penile lesions, and if possible of nodal metastases, plays an essential role in curing the disease and its prognosis. The review article highlights the importance of precise diagnosis and staging for the stratifi cation of the patients and selection appropriate therapy according to risk and prognostic factors. The role of contemporary radiotherapy and chemotherapy in multimodal treatment of penile cancer is discussed. Additionally, personal experience with HDR brachytherapy in the treatment of 25 patients is discussed., Hana Stankušová, and Literatura
a1_The purpose of the present study was to compare the ontogenetic development of the activity of myocardial energy-supplying enzymes in two mammalian species, differing significantly in their level of maturation at birth. The animals were investigated during the late prenatal period and 2, 7, 14, 21, 25, 30, 63, 120 and 730 days after birth in the rat and 2, 21, 84 and 175 days in the guinea-pig. The following enzymes were assayed in the right and left ventricular myocardium: lactate dehydrogenase (LDH, lactate uptake and/or formation), triose phosphate dehydrogenase (TPDH, carbohydrate metabolism), glycerol phosphate dehydrogenase (GPDH, glycerol-P shuttle)), hexokinase (HK, glucose phosphorylation), malate dehydrogenase (MDH, tricarboxylic cycle), citrate synthase (CS, tricarboxylic cycle) and hydroxyacyl-CoA dehydrogenase (HOADH, fatty acid breakdown). The rat heart, highly immature at birth, exhibits three different developmental patterns of energy-supplying enzymes, identical in both ventricles: (i) two mitochondrial enzymes of aerobic metabolism (CS, HOADH) and GPDH have a relatively low activity at the end of prenatal life; thereafter their activity steadily increases, approaching the adult levels between the 3rd and 4th postnatal weeks. A significant decrease was observed between the 4th and 24th months. (ii) MDH and LDH: prenatal values were significantly higher as compared with the 2nd postnatal day; after this period the activities increased up to adulthood (4 months) and decreased during senescence. (iii) The activities of HK and TPDH are characterized by only moderate changes during development. HK differs from all other enzymes by the highest prenatal values, which exceed even adult values. In contradiction to the rat heart, the developmental differences in more mature guinea-pig heart were significantly less pronounced., a2_The only ontogenetic differences observed were the lower activities of enzymes connected with aerobic metabolism at the end of the prenatal period. Our results point to possible differences in the development of adaptive metabolic pathways in animals with different levels of maturation at birth., A. Bass, M. Stejskalová, A. Stieglerová, B. Ošťádal, M. Šamánek., and Obsahuje bibliografii
Local application of four concentrations of bicuculline methiodide (a specific antagonist of GABAA receptors) was used to study a sensitivity of somatosensory cortex in four age groups of immature rats with implanted electrodes. Presence and latencies of two epileptic phenomena (focal discharges and seizures) were evaluated. Focal discharges exhibited moderate tendency to a decrease of sensitivity to bicuculline methiodide with maturation. Concentration-effect relation of incidence of focal discharges was observed only in 7- and 12-day-old but not in older animals. Results with incidence and latencies of seizures did not show relations to age or concentration of bicuculline. Neither of the epileptic phenomena can be used as a reliable index of cortical maturation., P. Mareš, K. Bernášková, H. Kubová., and Seznam literatury
An ontogenetic study of ecto-ATPase activity and the content of enzyme proteins was assessed in the caudate nucleus and hippocampal synaptic plasma membranes isolated from rats at various ages (15, 30, 90, 180 and 365 days). The ontogenetic profile revealed that the enzyme activities in both brain areas were the highest on day 30 and 365, while the ecto-ATPase protein abundance was the highest on day 15 after birth. Possible explanation for obtained ontogenetic profile and the discrepancy between activity and abundance may reside in the fact that ecto-ATPase during development could exert additional roles other than those related to metabolism of ATP. It is likely that ecto-ATPase, regulating the concentration of ATP and adenosine in synaptic cleft, has important role in the processes of brain development and aging., A. Banjac, N. Nedeljković, A. Horvat, D. Kanazir, G. Nizekić., and Obsahuje bibliografii
The aim of this work was to evaluate ontogeny of reactive nitrogen species (RNS) production by peripheral blood phagocytes in pig. Pig fetuses (55 and 92 days of gestation) and postnatal piglets (1, 3, 8, 17, 31 and 41 days after birth) were used. RNS production was measured by fluorescent probes diaminofluorescein-diacetate (DAF-FMDA) and dichloro-fluorescein-diacetate (H2DCFDA). Levels of nitration of cell proteins were established by immunofluorescent detection of nitrotyrosine. Levels of plasma nitrites/nitrates were detected spectrophotometrically by Griess reaction. Nitric oxide production measured by DAF-FMDA in neutrophils decreased during postnatal life. Spontaneous RNS measured by H2DCFDA decreased from 55th day of gestation to the 41st day of life. Phorbol-12-myristate-13-acetate activated production decreased during postnatal life. Production of NO measured by DAF-FMDA in macrophages decreased from the 1st to 41st day after birth. RNS production measured by H2DCFDA in monocytes did not show any significant changes during ontogeny. The level of nitrotyrosine significantly decreased from the 3rd to 17th day. Levels of plasma nitrites/nitrates gradually decreased from the 55th day of gestation to the 41st day after birth. A temporary increase in all parameters occurred after weaning, but without any significance. In conclusion, RNS production has a decreasing trend during ontogeny and is transiently upregulated after weaning., P. Zelníčková, M. Faldyna, J. Ondráček, H. Kovářů, F. Kovářů., and Obsahuje bibliografii a bibliografické odkazy
Thirty-eight specimens of Oochoristica macallisteri sp. n. were recovered from the small intestines of 16 of 123 (13 %) side-blotched lizards, Ota stansburiana Baird et Girard from California, USA. Oochoristica macallisteri sp. n. belongs to a group of species of Oochoristica possessing fewer than 25 testes in a single cluster and circular suckers, namely, O. elongata, O. junkea, O. lygosnmae. O. lygosomalis, O. novaezealandae, O. parvngenitalis and O. sobolevi. The new species can be readily differentiated from the other species of this group by number of lobules of the ovary or number of proglottids and from other species from California by number of testes or shape of vitellarium.
ONSTEP (Open New Simplified Totally Extraperitoneal) technika reparace tříselné/femorální kýly je inovativní metoda, jejímiž autory jsou portugalští chirurgové Dr. Augusto Lourenço a Dr. Rui Soares da Costa. Prezentace formou posteru proběhla na EHS/AHS kongresu v březnu 2012. Na území České republiky jsou prvními pracovišti provádějícími tento typ operace Chirurgické oddělení nemocnice Prostějov a Chirurgické oddělení Nemocnice ve Frýdlantě. ONSTEP technika představuje minimálně traumatizující přední přístup k operaci tříselné kýly s použitím samoexpandibilní síťky (oválná, anatomicky tvarovaná polypropylenová síťka s obvodovým paměťovým prstencem z polyetylen tereftalátu). Hlavní výhody této metody spočívají v krátké době operačního výkonu, možnosti provedení v lokální anestezii, krátké době rekonvalescence, nízkém výskytu pooperační chronické bolesti, nízkém počtu recidiv, krátké době hospitalizace a dobrém kosmetickému efektu. Je vhodná pro pracoviště zabývající se jednodenní chirurgií. Klíčová slova: tříselná kýla – operace – ONSTEP, The ONSTEP (Open New Simplified Totally Extraperitoneal) inguinal/femoral hernia repair technique is an innovative procedure presented by Portuguese surgeons Augusto Lourenço and Rui Soares da Costa within the EHS/AHS Congress in March 2012. The first institutions to perform this kind of hernia surgery in the Czech Republic are the Department of Surgery at Prostejov Hospital and the Department of Surgery at Frydlant Hospital. The ONSTEP technique represents a minimally traumatizing frontal approach to inguinal hernia repair using a special self-expanding mesh patch (an oval, anatomically-shaped moderate-pore polypropylene mesh with the circumferential memory-ring consisting of polyethylene terephthalate). The main advantages of this method are: short duration of surgery, the possibility of performing the procedure under local anaesthesia, short recovery time and rapid return to daily activities, low incidence of chronic post-operative groin pain, low recurrence rate, short hospital stay, good cosmetic effect and a low price. It is suitable for institutions performing outpatient surgery. Key words: inguinal hernia − repair technique − ONSTEP, and L. Kohoutek, J. Musil, P. Plecháčová, A. Gryga
Úvod: Problematika náhlých příhod břišních (NPB) u gravidních pacientek představuje specifickou oblast na rozhraní chirurgie a gynekologie. I když zdravotní péče o těhotnou pacientku spadá do péče gynekologa-porodníka, indikace operačního výkonu pro NPB je požadována od chirurga, který má obvykle znalosti a zkušenosti s vyšetřováním těhotných pacientek. Tato skutečnost nabízí prostor ke vzniku pochybení v poskytování zdravotní péče s možnými velmi závažnými důsledky pro matku i plod. Metoda: Byla provedena literární rešerše studií publikovaných za posledních 10 let v databázi PubMed týkajících se apendektomie, cholecystektomie a laparoskopie v těhotenství v kontextu náhlých příhod břišních. Vylučovacím kritériem byly operace provedené z porodnické indikace. Výsledky: Těhotenství je doprovázeno řadou anatomických a fyziologických změn, které je nutné brát v úvahu při klinickém vyšetření pacientky, analýze výsledků laboratorních vyšetření i v rámci operační taktiky. Využití zobrazovacích technik v diagnostice NPB u těhotných je výrazně omezeno prokázaným škodlivým efektem ionizujícího záření, jakož i nejasným dopadem silného magnetického pole na plod. Timing akutního operačního výkonu pro NPB u těhotných by neměl být odlišný od časování operační intervence u ostatních pacientek s NPB. Miniinvazivní chirurgie, resp. laparoskopické řešení vybraných NPB u těhotných představuje v současnosti již standardní operační techniku. Mnohé z obecných výhod laparoskopického přístupu (nižší riziko infekcí a dehiscencí operačních ran, rychlejší rekonvalescence atd.) se uplatňují i u gravidních pacientek. Závěr: Náhlé příhody břišní v těhotenství je nutné řešit v rámci multidisciplinární spolupráce mezi chirurgem, gynekologem, anesteziologem a neonatologem. S ohledem na dostupné výsledky publikovaných studií je laparoskopické řešení NPB u těhotných pacientek považováno za bezpečné a efektivní., Introduction: Acute abdomen during pregnancy presents very specific problem on the boundary of surgery and gynaecology. Although gynaecologists provide healthcare to pregnant women, surgery indication because of acute abdomen during pregnancy should be done by surgeon (who has usually little knowledge and experience regarding pregnant women examination and management). There is therefore real opportunity for possible mistakes origin with serious consequences for mother and foetus. Methods: Literature search in PubMed was done aimed at studies within the last 10 years dealing with appendectomy, cholecystectomy and laparoscopy during pregnancy in the context of acute abdomen. Surgical interventions done from obstetrics indications were excluded. Results: Pregnancy is associated with many anatomical and physiological changes which have to be considered not only during clinical examination, but also when analysing laboratory findings and considering operative tactics. Imaging modalities employment during pregnancy is very limited due to harmful effect of ionising radiation and not clear impact of strong magnetic field on the foetus. Timing of surgical interventions because of acute abdomen during pregnancy should be the same as timing of acute abdomen interventions in non-pregnant patients. Minimally invasive surgery in acute abdomen during pregnancy presents standard technique nowadays. Many advantages of laparoscopic approach (lower rate of surgical site infections, quicker convalescence etc.) are valid also during pregnancy. Conclusion: Acute abdomen during pregnancy should be managed within a multidisciplinary cooperation between gynaecologist, surgeon, anaesthesiologist and neonatologist. With respect to results of published studies, laparoscopic approach in the management of acute abdomen during pregnancy should be considered safe and effective., and P. Zonča, P. Ihnát, M. Peteja