Impact of nebulization versus metered-dose inhaler utilization on viral particle dispersion in patients with COVID-19.

Background: Conflicting guidance exists regarding the characterization of nebulization as an aerosol-generating procedure and subsequent risk of transmission of SARS-CoV-2 to healthcare workers.

Aim/objective: This study sought to address whether SARS-CoV-2 viral load distribution was impacted by bronchodilator delivery via nebulizer versus metered-dose inhaler (MDI).

Methods: Adults infected with COVID-19 were enrolled and received a single dose of albuterol sulfate nebulized solution (2.

Dissemination of UTC(NIST) over 20 km of commercial optical fiber with active phase stabilization.

We demonstrate the transfer of a cesium frequency standard steered to UTC(NIST) over 20 km of dark telecom optical fiber. Our dissemination scheme uses an active stabilization technique with a phase-locked voltage-controlled oscillator. Out-of-loop characterization of the optical fiber link performance is done with dual-fiber and single-fiber transfer schemes.

Hepatic Dysfunction Quantified by HepQuant DuO Outperforms Child-Pugh Classification in Predicting the Pharmacokinetics of Ampreloxetine.

HepQuant tests quantify liver function from clearance of deuterium- and 13C-labeled cholates administered either intravenously and orally (SHUNT) or orally (DuO). Hepatic impairment studies have relied on clinical or laboratory criteria like Child-Pugh classification to categorize the degree of hepatic dysfunction. We compared HepQuant tests with Child-Pugh classification in predicting the pharmacokinetics of ampreloxetine.

Update and Advances on Post-dural Puncture Headache.

This document provides an overview of post-dural puncture headache (PDPH), covering its historical perspective, anatomy and physiology of cerebrospinal fluid (CSF), pathophysiology, risk factors, diagnosis, and treatment options. PDPH is a common complication of dural puncture, characterized by a postural headache due to CSF leakage. The understanding of CSF and dural anatomy has evolved over time, leading to advancements in diagnosing and managing PDPH.