Sinus Tachycardia: a Multidisciplinary Expert Focused Review.

Sinus tachycardia (ST) is ubiquitous, but its presence outside of normal physiological triggers in otherwise healthy individuals remains a commonly encountered phenomenon in medical practice. In many cases, ST can be readily explained by a current medical condition that precipitates an increase in the sinus rate, but ST at rest without physiological triggers may also represent a spectrum of normal. In other cases, ST may not have an easily explainable cause but may represent serious underlying pathology and can be associated with intolerable symptoms.

The differential impact of respiratory event scoring criteria on CPAP eligibility in women and men.

Study Objectives: Obstructive sleep apnea is more prevalent and severe in men than women. The American Academy of Sleep Medicine offers 2 definitions for scoring hypopneas: "acceptable" = associated with a ≥ 4% oxygen desaturation, adopted by Center for Medicare and Medicaid Services (CMS), and "recommended" = associated with a ≥ 3% oxygen desaturation and/or an arousal. We hypothesized that CMS vs American Academy of Sleep Medicine scoring criteria would differentially impact continuous positive airway pressure eligibility in women and men.

Impact of the COVID-19 Pandemic on Orthopedic and Trauma Departments in Tunisia.

Objective: Measure the effect of the strategy to fight the Covid-19 pandemic, based on containment, on the practice of orthopedic and trauma surgery in Tunisia.

Methods: This is a comparative study, concerning the impact of Covid-19 on the flow of patients, operated in orthopedic surgery and trauma departments, during the containment period from March 12, 2020 to April 30, 2020, comparing it to the same period of the year 2019, in the Central-East region of Tunisia (Kairouan, Sousse, Mahdia, Monastir).

Results: A significant decrease of 27% in the flow of patients admitted to orthopedic surgery departments in central-eastern Tunisia, during the 2020 containment period, compared to the same period of the previous year was documented.

COVID-19 and Management of Orthopedic Emergencies. Producing a Consensus of Experts.

Objective: Report the results of a participatory approach in Tunisian orthopedic surgery, for the development of a consensus of experts, on the identification of the list of pathologies to always be considered as non-postponable emergencies, during the COVID-19 pandemic.

Material And Methods: This descriptive study of the opinions of Tunisian experts covered all orthopedic morbidities classified into three homogeneous groups: trauma, infections and tumors of the musculoskeletal system. The attitudes of the interviewees were collected using the "Delphi" method, using a "Google-Form" questionnaire, sent by email to all of the Tunisian university orthopedic surgeons in practice, and registered at the SOTCOT.

Massive hemorrhage after inspection bronchoscopy for carcinoid tumor.

Carcinoid tumor is a neuroendocrine tumor that can arise in the bronchial tree and can be hypervascular. Here we describe a case of bronchial carcinoid tumor in a 34-year-old previously healthy male who presented with hemoptysis and right lung mass. Inspection bronchoscopy revealed bronchus intermedius endobronchial lesion and was complicated by urgent intubation and placement of endobronchial blocker for massive hemorrhage.

High Interrater Reliability of Overnight Pulse Oximetry Interpretation Among Inexperienced Physicians Using a Structured Template.

Study Objectives: To assess the interrater reliability and accuracy of overnight pulse oximetry (OPO) interpretations by pulmonary fellows using a comprehensive structured template and after a brief educational session.

Methods: Using the template, four pulmonary and critical care (PCC) fellows interpreted OPO saturation waveforms and parameters extracted from 50 adult consecutive in-laboratory sleep studies. The template included three saturation parameters (mean saturation, oxygen desaturation index [ODI], and cumulative desaturation time) and description of the saturation waveform.

Pulmonary Hemorrhage following Edge-to-Edge Mitral Valve Repair.

Mitral valve repair with the MitraClip device has emerged as an effective treatment option for patients with severe mitral regurgitation and contraindications for surgical interventions. While the procedure is not known to cause pulmonary complications, we describe two cases of pulmonary hemorrhage following percutaneous mitral valve repair. The patients did well with supportive care and reinitiation of anticlotting agents was well tolerated after resolution of bleeding.

IR Near-Field Study of the Solid Electrolyte Interphase on a Tin Electrode.

There has been a dearth of suitable techniques for studying the chemical composition of solid electrolyte interphase (SEI) on Li-ion negative electrodes at a resolution of its basic building blocks' length scale. Infrared apertureless near-field scanning optical microscopy (IR aNSOM) is an emerging tool in the chemical characterization of interfacial layers on the nanometer scale. This work demonstrates an IR aNSOM imaging of the SEI layer on a model Sn electrode.

Deformable image tracking of the parotid gland for adaptive radiotherapy application.

Radiation therapy is a type of cancer treatment using radiation at different times defined as treatment sessions, distributed over different weeks. In each session, we have to determine and define the optimal treatment parameters for the patient. The aim of Adaptive Radiotherapy Treatment (ART) is to identify any change of initial parameters during the treatment course and modify the treatment plan for the purpose of maintaining optimal treatment objectives.

Nonreciprocal light propagation in a silicon photonic circuit.

Optical communications and computing require on-chip nonreciprocal light propagation to isolate and stabilize different chip-scale optical components. We have designed and fabricated a metallic-silicon waveguide system in which the optical potential is modulated along the length of the waveguide such that nonreciprocal light propagation is obtained on a silicon photonic chip. Nonreciprocal light transport and one-way photonic mode conversion are demonstrated at the wavelength of 1.

Near-field measurement of amplitude and phase in silicon waveguides with liquid cladding.

Heterodyne near-field scanning optical microscopy (H-NSOM) has proven useful as a tool for characterization of both amplitude and phase of on-chip photonic devices in air, but it has previously been unable to characterize devices with a dielectric overcladding, which is commonly used in practice for such devices. Here we demonstrate H-NSOM of a silicon waveguide with a liquid cladding emulating the solid dielectric. This technique allows characterization of practical devices with realistic refractive index profiles.

Micro-resonator with metallic mirrors coupled to a bus waveguide.

We demonstrate a micro-resonator based on a channel waveguide terminated with metallic mirrors side coupled to a bus waveguide. Transmission through such a resonant structure implemented in a silicon-on-insulator platform is investigated theoretically and demonstrated experimentally. The resonator is 13.

Compact chip-scale filter based on curved waveguide Bragg gratings.

We propose a method for miniaturization of filters based on curved waveguide Bragg gratings, so that long structures can be packed into a small area on a chip. This eliminates the stitching errors introduced in the fabrication process, which compromise the performance of long Bragg gratings. Our approach relies on cascading curved waveguide Bragg gratings with the same radius of curvature.