scholarly journals Ultrasonic humidifier lung as a mimic of COVID ‐19

2021 ◽  
Vol 9 (6) ◽  
Author(s):  
Shosei Ro ◽  
Ryosuke Imai ◽  
Atsushi Kitamura ◽  
Torahiko Jinta ◽  
Naoki Nishimura
Keyword(s):  
Ultrasonic Humidifier ◽  
Humidifier Lung

Clinical and radiological characteristics of ultrasonic humidifier lung and summer-type hypersensitivity pneumonitis

2020 ◽  
Vol 174 ◽  
pp. 106196
Author(s):  
Susumu Sakamoto ◽  
Marie Furukawa ◽  
Hiroshige Shimizu ◽  
Muneyuki Sekiya ◽  
Shion Miyoshi ◽  
...  
Keyword(s):  
Hypersensitivity Pneumonitis ◽  
Ultrasonic Humidifier ◽  
Humidifier Lung

scholarly journals A case of humidifier lung with a difficult differential diagnosis from COVID-19

2021 ◽  
Vol 2021 (10) ◽  
Author(s):  
Mariko Ono ◽  
Yoko Nagatomo ◽  
Hayato Kinoshita ◽  
Yukihisa Takeda ◽  
Hiroyuki Nakamura ◽  
...  
Keyword(s):  
Differential Diagnosis ◽  
Ct Scan ◽  
Hypersensitivity Pneumonitis ◽  
Challenge Test ◽  
Respiratory Illnesses ◽  
Rare Phenotype ◽  
Inhalation Challenge ◽  
Ultrasonic Humidifier ◽  
Humidifier Lung ◽  
Chest Ct Scan

ABSTRACT Acute respiratory illnesses that presented with diffuse ground-glass opacities (GGOs) on chest computed tomography (CT) scan suggest the diagnosis of coronavirus disease 2019 (COVID-19). However, many other diseases show similar CT findings, which often offer a difficult differential diagnosis. Here, we report a case of humidifier lung, a rare phenotype of hypersensitivity pneumonitis (HP), which mimicked COVID-19. A 71-year-old man was admitted because of dyspnea and diffuse GGOs found on chest CT scan. Although COVID-19 was initially suspected, his symptoms rapidly improved by the next day. A medical interview revealed that he had started using an ultrasonic humidifier 1 month ago. A high-resolution CT (HRCT) scan showed ill-defined centrilobular nodules and mosaic attenuation, which are typical of HP but atypical of COVID-19. The inhalation challenge test confirmed the diagnosis of humidifier lung. History-taking of humidifier use and a precise HRCT interpretation are helpful to differentiate it from COVID-19.

scholarly journals Features of humidifier lung and comparison with summer‐type hypersensitivity pneumonitis

Respirology ◽  
2021 ◽  
Author(s):  
Masafumi Shimoda ◽  
Kozo Morimoto ◽  
Yoshiaki Tanaka ◽  
Koji Furuuchi ◽  
Takeshi Osawa ◽  
...  
Keyword(s):  
Hypersensitivity Pneumonitis ◽  
Humidifier Lung

scholarly journals Development and Evaluation of an Ultrasonic Humidifier to Control Humidity in a Cold Storage Room for Postharvest Quality Management of Dates

Foods ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 949
Author(s):  
Maged Mohammed ◽  
Nashi Alqahtani ◽  
Hamadttu El-Shafie
Keyword(s):  
Quality Management ◽  
Cold Storage ◽  
Cooling System ◽  
Positive Impact ◽  
Droplet Diameter ◽  
Postharvest Quality ◽  
Main Element ◽  
Small Scale ◽  
Storage Room ◽  
Ultrasonic Humidifier

Dates are subjected to postharvest losses in quality and quantity caused by water loss, fermentation, insect infestation, and microbial spoilage during storage. Cold storage is the main element in the postharvest quality management used for fruit preservation. Although cold storage is used for dates, precision control of the relative humidity (RH) using ultrasonic applications is not used thus far, or it is applied to other fruits on a small scale. Therefore, we designed and constructed an ultrasonic humidifier (DUH) for RH control in the cold storage room (CSR) of dates. The optimum air velocity of 3 m s−1 at the outlets of the DUH ducts produced a mist amount of 6.8 kg h-1 with an average droplet diameter of 4.26 ± 1.43 µm at the applied voltage of 48 V and frequency of 2600 kHz of the transducers. The experimental validation was carried out by comparing a CSR controlled with the DUH with two conventional CSRs. The three tested CSRs were similar in dimensions, cooling system, and amount of stored dates. The time required for cooling 800 kg of dates in the controlled CSR from 25 °C to the target temperature of 5 °C was approximately 48 h. The DUH precisely controlled the RH at the maximum RH set point of 80% in the tested CSR at 5 °C. The controlled RH at 80% has a positive impact on the physicochemical characteristics of the stored dates. It significantly reduced the weight loss of the fruits and preserved fruit mass, moisture content, water activity, firmness, and color parameters. However, no significant effect was observed on fruit dimensions, sphericity, and aspect ratio. The microbial loads of mesophilic aerobic bacteria, molds, and yeasts fell within the acceptable limits in all tested CSRs. Both stored date fruits and artificially infested dates showed no signs of insect activity in the controlled CSR at the temperature of 5 °C and RH of 80%. The DUH proved to be a promising technology for postharvest quality management for dates during cold storage.

Simple fabrication of a three-dimensional porous polymer film as a diffuser for organic light emitting diodes

Nanoscale ◽  
2014 ◽  
Vol 6 (23) ◽  
pp. 14446-14452 ◽  
Author(s):  
Byung Wan Lim ◽  
Min Chul Suh
Keyword(s):  
Polymer Film ◽  
Spin Coating ◽  
Three Dimensional ◽  
Cost Effective ◽  
Porous Polymer ◽  
Organic Light Emitting Diodes ◽  
Coating Process ◽  
Light Emitting ◽  
Organic Light ◽  
Ultrasonic Humidifier

We have investigated a simple and cost-effective fabrication method for a porous polymer film employing the spin-coating process during continuous supply of water droplets by an ultrasonic humidifier.

Portable ultrasonic humidifier exacerbates indoor bioaerosol risks by raising bacterial concentrations and fueling pathogenic genera

Indoor Air ◽  
2021 ◽  
Author(s):  
Zili Yang ◽  
Lu‐An Chen ◽  
Chuanjun Yang ◽  
Yuqian Gu ◽  
Rong Cao ◽  
...  
Keyword(s):  
Ultrasonic Humidifier ◽  
Bacterial Concentrations

Enhancement of the productivity for single solar still with ultrasonic humidifier combined with evacuated solar collector: An experimental study

2020 ◽  
Vol 208 ◽  
pp. 112592 ◽  
Author(s):  
Ali I. Shehata ◽  
A.E. Kabeel ◽  
Mohamed M. Khairat Dawood ◽  
Aly M. Elharidi ◽  
A. Abd_Elsalam ◽  
...  
Keyword(s):  
Experimental Study ◽  
Solar Collector ◽  
Solar Still ◽  
Ultrasonic Humidifier

Behavioral characteristics of polyhexamethyleneguanidine (PHMG) particles in aqueous solution and air when sprayed into an ultrasonic humidifier

2020 ◽  
Vol 182 ◽  
pp. 109078 ◽  
Author(s):  
Sunju Kim ◽  
Seonkyeong Park ◽  
Hyeri Jo ◽  
Seungwhan Song ◽  
Seunghon Ham ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Behavioral Characteristics ◽  
Ultrasonic Humidifier

Hyperplastic effects of aerosolized sodium metabisulfite on rat airway mucus-secretory epithelial cells

1994 ◽  
Vol 72 (9) ◽  
pp. 1025-1030 ◽  
Author(s):  
Douglas J. Pon ◽  
Carlo J. van Staden ◽  
Louise Boulet ◽  
Ian W. Rodger
Keyword(s):  
Animal Models ◽  
Epithelial Cells ◽  
Bronchoalveolar Lavage ◽  
Lung Tissue ◽  
Small Animal ◽  
Sodium Metabisulfite ◽  
Airway Epithelia ◽  
Tissue Changes ◽  
Small Animal Models ◽  
Ultrasonic Humidifier

The ability of aerosolized sodium metabisulfite to induce hypertrophic and hyperplastic changes in rat airway secretory epithelial cells was investigated. A 10% solution of sodium metabisulfite was aerosolized into a Plexiglas exposure chamber, using an ultrasonic humidifier. The level of SO2 gas generated by this apparatus was measured to be 500 ppm. Measured levels of neutral and acidic mucous glycoproteins in extracts from tracheal and lung tissue were used as indices of hypertrophic (increases in mucus content per cell) and hyperplastic (increased numbers of cells containing mucus per gram of tissue) changes occurring in mucus-secreting cells of the airways. Exposing rats to sodium metabisulfite for 3 weeks resulted in profound increases in total neutral mucous glycoproteins found in tracheal and lung tissue (6.2-fold and 10.1-fold, respectively), compared with the H2O-treated counterparts. Total acidic mucous glycoproteins were significantly elevated in lung tissue only (13.5-fold). In addition, neutral and acidic mucous glycoproteins were elevated 20-fold and 9-fold, respectively, in bronchoalveolar lavage samples prepared from sodium metabisulfite exposed animals. These results indicate that aerosolized sodium metabisulfite may be a useful agent for developing small animal models of mucus hypersecretion.Key words: mucus, hypertrophy, hyperplasia, secretion, airway, epithelia.

Sign in / Sign up

Export Citation Format

Share Document