scholarly journals Performing Qualitative Mask Fit Testing Without a Commercial Kit: Fit Testing Which Can Be Performed at Home and at Work

2020 ◽  
pp. 1-5
Author(s):  
Eugenia O’Kelly ◽  
Anmol Arora ◽  
Charlotte Pearson ◽  
James R. Ward ◽  
P. John Clarkson
Keyword(s):  
Qualitative Study ◽  
High Accuracy ◽  
Test Solution ◽  
Additional Research ◽  
Popular Method ◽  
Test Kit ◽  
Fit Testing ◽  
Safety And Reliability ◽  
Testing Solution ◽  
Commercial Kit

ABSTRACT Objective: Qualitative fit testing is a popular method of ensuring the fit of sealing face masks such as N95 and FFP3 masks. Increased demand due to the coronavirus disease 2019 (COVID-19) pandemic has led to shortages in testing equipment and has forced many institutions to abandon fit testing. Three key materials are required for qualitative fit testing: the test solution, nebulizer, and testing hood. Accessible alternatives to the testing solution have been studied. This exploratory qualitative study evaluates alternatives to the nebulizer and hoods for performing qualitative fit testing. Methods: Four devices were trialed to replace the test kit nebulizer. Two enclosures were tested for their ability to replace the test hood. Three researchers evaluated promising replacements under multiple mask fit conditions to assess functionality and accuracy. Results: The aroma diffuser and smaller enclosures allowed participants to perform qualitative fit tests quickly and with high accuracy. Conclusions: Aroma diffusers show significant promise in their ability to allow individuals to quickly, easily, and inexpensively perform qualitative fit testing. Our findings indicate that aroma diffusers and homemade testing hoods may allow for qualitative fit testing when conventional apparatus is unavailable. Additional research is needed to evaluate the safety and reliability of these devices.

scholarly journals Performing Qualitative Mask Fit Testing without a Commercial Kit: Fit Testing Which can be Performed at Home and at Work

2020 ◽  
Author(s):  
Eugenia O'Kelly ◽  
Anmol Arora ◽  
Charlotte Pearson ◽  
James Ward ◽  
P John Clarkson
Keyword(s):  
Qualitative Study ◽  
High Accuracy ◽  
Test Solution ◽  
Testing Methods ◽  
Popular Method ◽  
Test Kit ◽  
Fit Testing ◽  
Safety And Reliability ◽  
Testing Solution ◽  
Commercial Kit

Introduction: Qualitative fit testing is a popular method of ensuring the fit of sealing face masks such as N95 and FFP3 masks. Increased demand due to the COVID-19 pandemic has led to shortages in testing equipment and has forced many institutions to abandon fit testing. Three key materials are required for qualitative fit testing: the test solution, nebulizer, and testing hood. Accessible alternatives to the testing solution have been studied. This exploratory qualitative study evaluates alternatives to the nebulizer and hoods for performing qualitative fit testing. Methods: Four devices were trialled to replace the test kit nebulizer. Two enclosures were tested for their ability to replace the test hood. Three researchers evaluated promising replacements under multiple mask fit conditions to assess functionality and accuracy. Results: The aroma diffuser and smaller enclosures allowed participants to perform qualitative fit tests quickly and with high accuracy. Discussion & Conclusion: Aroma diffusers show significant promise in their ability to allow individuals to quickly, easily, and inexpensively perform qualitative fit testing. Our findings indicate that aroma diffusers and homemade testing hoods may allow for qualitative fit testing when conventional apparatus is unavailable. Additional research is needed to evaluate the safety and reliability of these devices.

Insights from a Focused Autobiography

1997 ◽  
Vol 17 (2) ◽  
pp. 99-104 ◽  
Author(s):  
Virginia Allen Dickie
Keyword(s):  
Qualitative Study ◽  
Additional Research ◽  
Necessary Condition ◽  
Unintended Effect ◽  
Research Questions ◽  
Researcher Bias

Use of a focused autobiographical account to explicate researcher bias in a qualitative study had the unintended effect of identifying additional research questions and analytical insights. Hermeneutic theory suggests that bias, or “pre-understanding,” is a necessary condition of any interpretative endeavor.

Preservation of Plant Cell Surfaces For Scanning Electron Microscopy

1973 ◽  
Vol 31 ◽  
pp. 472-473
Author(s):  
Linda M. Sicko ◽  
Thomas E. Jensen
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Critical Point ◽  
Filter Paper ◽  
Freeze Drying ◽  
Cell Surfaces ◽  
Air Drying ◽  
Popular Method ◽  
Critical Point Drying ◽  
Scanning Electron

The use of critical point drying is rapidly becoming a popular method of preparing biological samples for scanning electron microscopy. The procedure is rapid, and produces consistent results with a variety of samples. The preservation of surface details is much greater than that of air drying, and the procedure is less complicated than that of freeze drying. This paper will present results comparing conventional air-drying of plant specimens to critical point drying, both of fixed and unfixed material. The preservation of delicate structures which are easily damaged in processing and the use of filter paper as a vehicle for drying will be discussed.

A New 1,000 kV Electron Microscope

1967 ◽  
Vol 25 ◽  
pp. 260-261
Author(s):  
M. Nishigaki ◽  
S. Katagiri ◽  
H. Kimura ◽  
B. Tadano
Keyword(s):  
Electron Microscope ◽  
High Voltage ◽  
Basic Research ◽  
Chromatic Aberration ◽  
High Accuracy ◽  
Biological Specimen ◽  
Voltage Electron ◽  
High Voltage Electron Microscope ◽  
High Voltage Electron

The high voltage electron microscope has many advantageous features in comparison with the ordinary electron microscope. They are a higher penetrating efficiency of the electron, low chromatic aberration, high accuracy of the selected area diffraction and so on. Thus, the high voltage electron microscope becomes an indispensable instrument for the metallurgical, polymer and biological specimen studies. The application of the instrument involves today not only basic research but routine survey in the various fields. Particularly for the latter purpose, the performance, maintenance and reliability of the microscope should be same as those of commercial ones. The authors completed a 500 kV electron microscope in 1964 and a 1,000 kV one in 1966 taking these points into consideration. The construction of our 1,000 kV electron microscope is described below.

Alterations in Ultrastructure of Skeletal Muscle From Newborn Guinea Pigs Following in Utero Exposure to Ethanol

1985 ◽  
Vol 43 ◽  
pp. 686-687
Author(s):  
C. Uphoff ◽  
C. Nyquist-Battie ◽  
T.B. Cole
Keyword(s):  
Skeletal Muscle ◽  
Guinea Pigs ◽  
Muscle Development ◽  
In Utero ◽  
Ethanol Exposure ◽  
Prenatally Exposed ◽  
Chronic Alcoholic ◽  
Test Kit ◽  
Food And Water Intake ◽  
Post Intubation

Ultrastructural alterations of skeletal muscle have been observed in adult chronic alcoholic patients. However, no such study has been performed on individuals prenatally exposed to ethanol. In order to determine if ethanol exposure in utero in the latter stages of muscle development was deleterious, skeletal muscle was obtained from newborn guinea pigs treated in the following manner. Six Hartly strain pregnant guinea pigs were randomly assigned to either the ethanol or the pair-intubated groups. Twice daily the 3 ethanol-treated animals were intubated with Ensure (Ross Laboratories) liquid diet containing 30% ethanol (6g/Kg pre-pregnant body weight per day) from day 35 of gestation until parturition at day 70±1 day. Serum ethanol levels were determined at 1 hour post-intubation by the Sigma alcohol test kit. For pair-intubation the Ensure diet contained sucrose substituted isocalorically for ethanol. Both food and water intake were monitored.

Qualitative study on “hydropic degeneration” of The hepatocytes in viral hepatitis

1990 ◽  
Vol 48 (3) ◽  
pp. 568-569
Author(s):  
Le Meizhao ◽  
Ye Ming ◽  
Song Xiaoming ◽  
Xu Jiazhang
Keyword(s):  
Qualitative Study ◽  
Viral Hepatitis ◽  
Chronic Active Hepatitis ◽  
Microscopic Observation ◽  
Hydropic Degeneration ◽  
Light Microscopic Observation ◽  
Biopsy Specimens ◽  
Endoplasm Reticulum ◽  
Mixed Fluid ◽  
Peripheral Cytoplasm

“Hydropic degeneration” of the hepatocytes are often found in biopsy of the liver of some kinds of viral hepatitis. Light microscopic observation, compareted with the normal hepatocytes, they are enlarged, sometimes to a marked degree when the term “balloning” degeneration is used. Their cytoplasm rarefied, and show some clearness in the peripheral cytoplasm, so, it causes a hydropic appearance, the cytoplasm around the nuclei is granulated. Up to the present, many studies belive that main ultrastructural chenges of hydropic degeneration of the hepatocytes are results of the RER cristae dilatation with degranulation and disappearance of glycogen granules.The specimens of this study are fixed with the mixed fluid of the osmium acidpotassium of ferricyanide, Epon-812 embed. We have observed 21 cases of biopsy specimens with chronic severe hepatitis and severe chronic active hepatitis, and found that the clear fields in the cytoplasm actually are a accumulating place of massive glycogen. The granules around the nuclei are converging mitochondria, endoplasm reticulum and other organelles.

American Speech-Language Pathologists' Training and Legislative Knowledge When Working With Immigrant and Refugee Populations: A Qualitative Study

2019 ◽  
Vol 4 (5) ◽  
pp. 1148-1161
Author(s):  
Camilo Maldonado ◽  
Alejandro Ashe ◽  
Kerri Bubar ◽  
Jessica Chapman
Keyword(s):  
Qualitative Study ◽  
Service Provision ◽  
Limited English Proficiency ◽  
Linguistic Diversity ◽  
Speech Language Pathologists ◽  
Federal Mandates ◽  
Refugee Families ◽  
Provision Of Services ◽  
English Speaking ◽  
Immigrant And Refugee

Background American educational legislation suggests culturally competent speech and language services should be provided in a child's native language, but the number of multilingual speech-language pathologists (SLPs) is negligible. Consequently, many monolingual English-speaking practitioners are being tasked with providing services to these populations. This requires that SLPs are educated about cultural and linguistic diversity as well as the legislation that concerns service provision to non-English or limited English proficiency speakers. Purpose This qualitative study explored the experiences of monolingual, American, English-speaking SLPs and clinical fellows who have worked with immigrant and refugee families within a preschool context. It investigated what training SLPs received to serve this population and what knowledge these SLPs possessed with regard to federal legislation governing the provision of services to culturally and linguistically diverse (CLD) communities. Method Ten American clinicians with experience treating CLD children of refugee and immigrant families in the context of preschool service provision participated in the study. Semistructured interviews were utilized to better understand the type of training clinicians received prior to and during their service delivery for CLD populations. Additionally, questions were asked to explore the degree to which practitioners understood federal mandates for ethical and effective service provision. The data collected from these interviews were coded and analyzed using the principles of grounded theory. Findings The results of this study revealed that there was a general sense of unpreparedness when working with CLD clients. This lack of training also attributed to a deficiency of knowledge surrounding legislation governing service provision to CLD populations.

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