1,721,018 research outputs found
Epistaxis in hospitalized patients with COVID-19
No full textSpontaneous epistaxis in patients with COVID-19 can represent a clinical challenge with respect to both the risk of contamination and the treatment options. We herein present the data of 30 patients with COVID-19 who developed spontaneous epistaxis while hospitalized at Eastern Piedmont Hospital during March and April 2020. All patients received low-molecular-weight heparin during their hospital stay and required supplementary oxygen therapy either by a nasal cannula or continuous positive airway pressure. Both conditions can represent risk factors for developing epistaxis. Prevention of crust formation in patients with rhinitis using a nasal lubricant should be recommended. If any treatment is required, appropriate self-protection is mandatory
Maxillo-mandibular osteoradionecrosis following C-ion radiotherapy: Clinical notes and review of literature
No full textOsteoradionecrosis (ORN) is one of the most feared complications after head and neck radiotherapy. Among head and neck sites, the mandible is the most commonly involved bone. Heavy ion radiotherapy delivers high-dose distribution focused to the target while simultaneously sparing of the adjacent organs but there are anyway some reported cases of ORN. Cases in literature reported well-known risk factors for its developing (e.g. tobacco and alcohol abuse, diabetes), but other are still debated (e.g. teeth extraction during radiotherapy). Prevention is mandatory but multimodal care may be required, tailoring all treatments on the patient needs. This study, after a brief revision of the literature, reports and a case of maxillo-mandibular ORN following carbon-ion (C-ion) radiotherapy and its treatment
A solitary sinonasal angiomatous polyp presenting with obstructive sleep apnea in an adult
No full textBackground: Obstructive sleep apnea (OSA) is frequently encountered in adult sleep disorders and needs careful differential diagnosis. Ear, nose, throat examination, including naso-laryngeal endoscopy, is mandatory in all cases to rule out potential obstructing lesions causing OSA. Clinical presentation: This report presents a 64-year-old male with snoring, nasal blockage (especially during night-time), and mild OSA. Physical-examination and CT revealed a unilateral vascularized left sinonasal mass extending to the nasopharynx and protruding into the oropharynx during inhalation. Due to suspicions of malignancy or vascular tumor, the patient also underwent contrast MRI. Endoscopic surgery was performed, and the final diagnosis was a sinonasal angiomatous polyp (SAP). SAPs are rare, and this is the first reported case of an adult solitary unilateral angiomatous polyp referral for OSA. Conclusion: Nasal masses need to be considered in the differential diagnosis of patients with obstructive sleep disorders in order to avoid wrong or ineffective treatment
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Spontaneous Nasal Cerebrospinal Fluid Leak Repaired With Single-Layer Mucoperichondrial Graft: Long-term Results
No full textBackground: Spontaneous cerebrospinal fluid leak (sCSFL) has been historically related to obesity and elevated intracranial pressure (ICP), with a lower rate of success of endoscopic repair reported in the literature. Moreover, defects related to this condition have been largely repaired with multilayer reconstructions and pedicled flaps. Long-term postoperative results have not been appropriately discussed yet. Objective: The aim of this study is to investigate the outcome of a cohort of patients treated with single-layer mucoperichondrial graft. Methods: A retrospective review of clinical records of a consecutive series of patients who underwent endonasal endoscopic surgery for sCSFL was carried out at a tertiary care referral center for skull base pathologies. All patients underwent reconstruction with single-layer mucoperichondrial free graft. Local flap failures and postoperative outcomes, in terms of recurrence of sCSFL or brain herniation, were registered. Results: Neither intraoperative nor perioperative complications were reported. Definitive closure was achieved in 27 of 29 (93%) patients after the first attempt, while in 2 cases, a revision surgery was required. In both of these, an inadequate position of the graft was detected and was repaired likewise with the same mucoperichondrial graft. None of the patients required postoperative lumbar drain placement. After a median follow-up period of 57 months, only 1 patient developed a meningocele without CSFL about 2 years after surgery at the contralateral lateral recess of the sphenoid sinus. None of the patients reported symptoms referable to elevated ICP nor underwent ventricular derivation. Conclusions: Single-layered mucoperichondrial free graft was safe and effective in the majority of the examined patients. In 7% of the study population, a surgical revision was necessary due to local failure of the graft. However, during long-term follow-up, only 1 case of recurrent meningocele without CSFL was reported in a patient who presented borderline ICP
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
- …
