PubMed · 8041911
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L T Lusk. 1994. Peak performance.. https://pubmed.ncbi.nlm.nih.gov/8041911/
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The breakthrough times of five organic solvents at various vapor concentrations were measured in steady-state and pulsating flows on commercially available respirator cartridges. The relationship between the logarithmic vapor concentration and the logarithmic breakthrough time of each organic solvent showed an inverse correlation in both of the flow patterns. The organic solvents with lower boiling points exhibited the shorter breakthrough times in both of the flow patterns. The ratios of the breakthrough times in the pulsating flow to those in the steady-state flow were lower than 0.9 when the vapor concentrations were higher than 600 ppm for ethyl acetate, methyl acetate, acetone and dichloromethane. From the present study, the breakthrough in the pulsating flow tends to occur earlier than in the steady-state flow when using a highly concentrated vapor of an organic solvent with a low boiling point.
The following are things I have learned, routines my nurses have brought to me, or that we have developed together during 11-years existence with amyotropic lateral sclerosis (ALS) eight of which have been burdened by ALS induced quadriplegia and ventilator dependence. Items are listed, not in order of importance, which may vary from individual to individual, but alphabetically. Some are unique. Some commonplace. All are useful and many are of surprising value. Deviations from common understanding or practice are marked with an asterisk, and practices that can afford significant economies are double asterisked. This is written in an attempt to share with others in the profession lessons I have learned from personal experience--the hard way.