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  • 1
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    Milano : Springer
    (Springer ABC, 5)  
    Keywords: Medicine ; Medicine & Public Health ; Medicine/Public Health, general ; Springer eBooks
    Description / Table of Contents: 〈p〉Introduzione -- Tecnica d€™índagine -- Anatomia e punti critici.-Ruolo della TC nella valutazione preimplantare -- Altre applicazioni della TC Dentascan -- Bibliografia.〈/p〉
    Abstract: Il successo del trattamento chirurgico implantare ©· strettamente correlato a un€™ádeguata pianificazione dell€™íntervento e a una rigorosa valutazione preoperatoria. L€™ímpiego di software di ricostruzione delle immagini dedicati alla diagnostica dentale, del tipo Dentascan, permette di ottenere ricostruzioni cross-section e simil-panoramiche (panorex) che misurano la quantit© di tessuto osseo disponibile e definiscono accuratamente le strutture anatomiche contigue o la presenza di eventuali patologie associate. Questo manuale, dal taglio pratico e sintetico, affronta le principali questioni di ordine tecnico e metodologico relative allo studio TC mirato delle arcate dentarie e alla descrizione dell€™ánatomia e dei punti critici. Particolare rilievo ©· attribuito alle problematiche relative alla valutazione pre-implantologica, ai risultati e alle complicanze del trattamento, con cenni anche ad alcune indicazioni extra-implantari
    Pages: IX, 47 pagg. : digital.
    ISBN: 9788847027398
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  • 2
    ISSN: 1432-1084
    Keywords: Liver, neoplasms ; Liver, diseases ; Liver, focal nodular hypersplasia ; Magnetic resonance imaging ; Magnetic resonance imaging ; Magnetic resonance (MR), tissue characterization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Two cases of local nodular hyperplasia (FNH), in which ultrasound (US), computed tomography (CT), and magnetic resonance imaging (MR) studies detected an atypical hemorrhagic pattern associated with an intrahepatic arterio venous malformation (AVM) around the growths, are presented. In both cases, histology demonstrated a very early regenerative stage — without central scar or fibrosis — and necrotichemorrhagic areas within the lesions. In these cases, the analysis of radiological findings, surgical specimens and histology seemed to confirm the pathogenetic hypothesis suggested by Wanless [1]: in normal liver parenchyma, a “blood steal” phenomenon due to congenital or acquired intrahepatic AVM — arterio portal or porto systemic shunt — could cause ischemic damaged, appering as a hemorrhagic necrotic area, the extent of which depends on the degree of residual portal supply (maintained in Case 1, and markedly reduced in Case 2 due to arterio portal shunting). The subsequent phase of repair could activate the regenerative-hyperplastic process, evolving into final fibrosis, which represents the “mature” pattern of FHN.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1084
    Keywords: Key words: Liver – Transplantation – Pulmonary complications – Lung infection – Lung interstitial diseases – Lung radiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The aim of this study was to evaluate the incidence, radiographic appearance, time of onset, outcome and risk factors of non-infectious and infectious pulmonary complications following liver transplantation. Chest X-ray features of 300 consecutive patients who had undergone 333 liver transplants over an 11-year period were analysed: the type of pulmonary complication, the infecting pathogens and the mean time of their occurrence are described. The main risk factors for lung infections were quantified through univariate and multivariate statistical analysis. Non-infectious pulmonary abnormalities (atelectasis and/or pleural effusion: 86.7 %) and pulmonary oedema (44.7 %) appeared during the first postoperative week. Infectious pneumonia was observed in 13.7 %, with a mortality of 36.6 %. Bacterial and viral pneumonia made up the bulk of infections (63.4 and 29.3 %, respectively) followed by fungal infiltrates (24.4 %). A fairly good correlation between radiological chest X-ray pattern, time of onset and the cultured microorganisms has been observed in all cases. In multivariate analysis, persistent non-infectious abnormalities and pulmonary oedema were identified as the major independent predictors of posttransplant pneumonia, followed by prolonged assisted mechanical ventilation and traditional caval anastomosis. A “pneumonia-risk score” was calculated: low-risk score ( 〈 2.25) predicts 2.7 % of probability of the onset of infections compared with 28.7 % of high-risk ( 〉 3.30) population. The “pneumonia-risk score” identifies a specific group of patients in whom closer radiographic monitoring is recommended. In addition, a highly significant correlation (p 〈 0.001) was observed between pneumonia-risk score and the expected survival, thus confirming pulmonary infections as a major cause of death in OLT recipients.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-2277
    Keywords: Key words Liver transplantation ; technique ; Piggy-back ; liver transplantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Liver transplantation with preservation of the recipient vena cava (the “piggy-back” technique) has been proposed as an alternative to the traditional method. We performed a randomized study on 39 cirrhotic patients, 20 who underwent the piggy-back technique (group 1) and 19 the traditional method using venovenous bypass (group 2) to evaluate the feasibility and true advantages of the piggy-back technique compared to the traditional method. Two patients were switched to the conventional technique due to the presence of a caudate lobe embracing the vena cava in one patient and a caval lesion in the other. Statistically significant differences between the two groups were only found for the warm ischemia time (48.5 ± 13 min for piggy-back vs 60 ± 12 min for the conventional method) and for renal failure (zero cases in group 1 vs four cases in group 2). We therefore believe that liver transplantation with the piggy-back technique can easily be performed in almost all cases, and that only a few, specific situations, such as a very enlarged caudate lobe, do not justify its routine use.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Hepatitis B (HBV) and hepatitis C (HCV) viral infections often recur after orthotopic liver transplantation (OLT), but viral infections acquired with OLT have not been widely investigated. The aim of the study was to evaluate the incidence, evolution, and diagnostic problems of de novo HBV and HCV infections in liver transplant recipients with long-term follow-up. Altogether 121 transplant recipients entered the study. HBV, HDV, and HCV infections were diagnosed by means of serology and the polymerase chain reaction (PCR). Three patients became hepatitis B surface antigen (HBsAg)-positive after OLT, all of whom showed signs of persistent viral replication. Twelve patients became anti-HCV-positive after OLT: After clearance of passive antibodies, active anti-HCV seroconversion was usually delayed. The viral genome was detected in 9 of 12 patients, with fluctuations of viremia during their follow-up. The other three patients, who were HBsAg-positive before and after OLT, were repeatedly HCV-RNA-negative despite persistent anti-HCV reactivity. Four pre-OLT HBsAg-positive patients had evidence of HBV-related liver transplant disease. The remaining 8 of 12 patients experienced repeated alanine aminotransferase increases more than two times normal after transplant. De novo infections due to primary hepatotropic viruses were frequent after OLT in our experience. Early diagnosis of infection, especially when the HCV is involved, may be problematic and should be taken into account in patients showing persistent aminotransferase abnormalities. Monitoring viral markers and accurate evaluation of biopsy specimens are mandatory. The interference between HBV and HCV might play a role in the replicative cycle of one or both viruses in co-infected patients.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-0509
    Keywords: Key words: Fibrovascular polyp—Fibrovascular polyp, CT—Fibrovascular polyp, MR.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. We present a case of giant fibrovascular polyp of the esophagus with predominant fat contents. Both computed tomography (CT) and magnetic resonance imaging (MRI) findings of this rare tumor are reported. The employment of CT and MRI in the presurgical evaluation of fibrovascular esophageal polyp is suggested.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-0509
    Keywords: Key words: Magnetic resonance, liver—Echinococcus—Echinococcus, transphrenic migration, bronchial fistula.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We present an uncommon case of hepatic hydatidosis, complicated by transphrenic migration of the cyst, in which the use of magnetic resonance performed with ultrafast, breath-hold, heavily T2-weighted sequences (HASTE) demonstrated a bronchial fistula.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1617-4623
    Keywords: Antibiotics ; Archaebacteria ; Ribosomes ; Evolution ; Thermoplasma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The susceptibility of Thermoplasma acidophilum (an extremely acidophilic, moderately thermophilic, wall-less sulphur-oxidizing archaebacterium) to 50 ribosome-specific inhibitors of polypeptide elongation was surveyed using efficient poly(U)-and poly(UG)-directed cell-free systems and comparable reference systems derived from eubacterial (Bacillus stearothermophilus, Escherichia coli) and eukaryotic (Saccharomyces cerevisiae) species. Under optimum temperature (58° C) and ionic conditions for polypeptide synthesis Thermoplasma ribosomes are only sensitive to the 70 S/80 S ribosome-directed aminoglycoside neomycin, and to five 80 S ribosome-directed inhibitors all of which (α-sarcin, mitogillin, restrictocin, dianthin and gelonin) impair the functioning of the large (60 S) ribosomal subunit. Sensitivity of the three structurally related compounds α-sarcin, mitogillin and restrictocin and susceptibility to neomycin place Thermoplasma ribosomes between those of Sulfolobus solfataricus (only sensitive to α-sarcin) and Methanococcus vannielli (sensitive to α-sarcin, mitogillin, restrictocin and neomycin but also affected by a variety of 70 S ribosome-directed drugs). The phylogenetic significance of the greatly diversified antibiotic sensitivity spectra displayed by archaebacteria in general, as opposed to the uniform ones exhibited by eubacteria and eukaryotes, is discussed.
    Type of Medium: Electronic Resource
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  • 9
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 250 (1974), S. 645-646 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] All these theories, however, do agree that although there is no clear relationship between the functional group(s) present and odour, the mechanism of interaction with the receptor(s) must be physicochemical involving either electronic, vibrational or rotational forces or any combination of these. ...
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