Clinical-evolutional particularities of the cryoglobulinemic vasculitis in the case of a patient diagnosed with hepatitis C virus in the predialitic phase

Hepatitis C virus (HCV) represents a fundamental issue for public health, with long term evolution and the gradual appearance of several complications and associated pathologies. One of these pathologies is represented by cryoglobulinemic vasculitis, a disorder characterized by the appearance in the patient’s serum of the cryoglobulins, which typically precipitate at temperatures below normal body temperature (37°C) and dissolve again if the serum is heated. Here, we describe the case of a patient diagnosed with HCV that, during the evolution of the hepatic disease, developed a form of cryoglobulinemic vasculitis. The connection between the vasculitis and the hepatic disorder was revealed following treatment with interferon, with the temporary remission of both pathologies and subsequent relapse at the end of the 12 months of treatment, the patient becoming a non-responder. The particularity of the case is represented by both the severity of the vasculitic disease from its onset and the deterioration of renal function up to the predialitic phase, a situation not typical of the evolution of cryoglobulinemia. Taking into account the hepatic disorder, the inevitable evolution towards cirrhosis, and the risk of developing the hepatocellular carcinoma, close monitoring is necessary

Historical vignette: The first brain surgery performed by the first woman neurosurgeon in Romania, Dr. Sofia Ionescu-Ogrezeanu

Introduction. Sofia Ionescu-Ogrezeanu (b. April 25, 1920, F?lticeni - d. March 21, 2008, Bucharest), also known as the Lady of Romanian Neurosurgery, became the first woman neurosurgeon in the world after performing a brain surgery during World War II, a fact recognized as a world premiere during the 13th World Congress of the World Federation of Neurosurgical Societies (WFNS) in Morocco, in 2005. [1] Materials and methods. Sofia Ionescu is the first woman neurosurgeon. She was born on the fields of Bucovina, in F?lticeni, and became part of the "golden team" of the Romanian neurosurgery of the pioneering period. The decisive moment of her career took place in 1944, during the war when she was forced to perform an emergency operation on a child, a victim of the bombing. The article coagulates the reports regarding the description of the first brain surgery performed by the first woman neurosurgeon with the continuous activity integrated with the field of neurosurgery. Both specialized articles, biographical books, and television interviews were used as references. Results. The operation performed in the fifth year of faculty was the first step of a journey of 47 years of neurosurgical career, practised with high morality and devotion. The sacrifice of the pioneer of the first woman neurosurgeon was recognized in the press in the country and abroad, as well as by the recognition of different titles and distinctions

Electrical behavior of multi-walled carbon nanotube network embedded in amorphous silicon nitride

The electrical behavior of multi-walled carbon nanotube network embedded in amorphous silicon nitride is studied by measuring the voltage and temperature dependences of the current. The microstructure of the network is investigated by cross-sectional transmission electron microscopy. The multi-walled carbon nanotube network has an uniform spatial extension in the silicon nitride matrix. The current-voltage and resistance-temperature characteristics are both linear, proving the metallic behavior of the network. The I-V curves present oscillations that are further analyzed by computing the conductance-voltage characteristics. The conductance presents minima and maxima that appear at the same voltage for both bias polarities, at both 20 and 298 K, and that are not periodic. These oscillations are interpreted as due to percolation processes. The voltage percolation thresholds are identified with the conductance minima

Alveolar ridge preservation following tooth extraction – basic concepts

After tooth extraction due different clinical situations, there are some physiological changes that include volumetric resorption of the bone, leading to changes in the dimensions and contours of the alveolar ridge that can negatively impact the aesthetic outcome of an implant or of a conventional prosthetic rehabilitation. In order to prevent and minimize adverse consequences from such dimensional changes, the present review aims to present some fundamental basis regarding alveolar ridge preservation and biomaterials used to prevent bone resorption

Periodontal Medicine: Impact of Periodontal Status on Pregnancy Outcomes and Carcinogenesis

Periodontal medicine is a broad term commonly used to define the relationship between periodontitis and systemic health. Periodontitis is a highly prevalent, chronic multifactorial infectious disease, induced by the dysbiotic biofilm that triggers a persistent systemic inflammation and recurrent bacteremia. There is a growing body of scientific evidence that suggests the potential implication of periodontitis in the causation and progression of various systemic disease and conditions, such as diabetes, cardiovascular disease, pulmonary disease, adverse pregnancy outcomes and cancer. Some studies consider periodontitis as an independent risk factor for preterm birth, growth restriction, low birth-weight and pre-eclampsia. However not all studies support the association. Despite sparse scientific data, some studies indicate that individuals with periodontitis are at increased risk for cancer development, due to the increased inflammatory burden sustained by the presence of periodontal pathogens. This chapter emphasis the relationship between periodontitis and adverse pregnancy outcomes and the underlying mechanisms that link peridontitis to oral carcinogenesis

Periodontitis and Heart Disease: Current Perspectives on the Associative Relationships and Preventive Impact

Due to the important advancement and the accumulation of new evidence on the periodontitis-cardiovascular disease (CVD) relationship as well as the major medical, economic and social burden caused by both diseases this chapter aims to review existing epidemiological and pathogenetic links related to this topic. Also, this chapter aims to highlight the impact of the periodontitis-CVD relationships on clinical practice and on the preventive approaches targeting to decrease the impact of periodontitis on CVD. Periodontitis is an infectious disease eliciting local and general inflammation, which leads to periodontal destruction and systemic involvement. Several pathways could explain the link between periodontitis and CVD such as bacteraemia, chronic persistent systemic inflammation and oxidative stress. The first step in the treatment of periodontitis addresses the elimination of microbial components, which lead to a decrease in local and systemic inflammation. Periodontal therapy seems to positively impact CVD. Specialists should inform patients with CVD on the negative impact of periodontitis on their systemic status and refer patients to the periodontist for an extensive examination as routine management of CVD. Some possible risks of periodontal therapy should be considered in patients undergoing antithrombotic medication

Minimum parametric flow in time-dependent dynamic networks

The paper presents a dynamic solution method for the parametric minimum flow in time-dependent, dynamic network. This approach solves the problem for a special parametric dynamic network with linear lower bound functions of a single parameter. Instead of directly working in the original network, the method implements a labelling algorithm which works in the parametric dynamic residual network where repeatedly decreases the flow along quickest dynamic source-sink paths for different subintervals of parameter values, in their increasing order. In each iteration, the algorithm computes both the parametric minimum flow within a certain subinterval, and the new subinterval for which the flow needs to be computed