Overview

General Books publication date: 2009 Original publication date: 1885 Original Publisher: Longmans, Green Subjects: Respiratory organs Respiratory therapy Notes: This is a black and white OCR reprint of the original. It has no illustrations and there may be typos or missing text. When you buy the General Books edition of this book you get free trial access to Million-Books.com where you can select from more than a million books for free. Excerpt: CHAPTER II. THE PRINCIPLES CONCERNED IN THE VOLATILIZATION AND INHALATION OF MEDICAMENTS. There are several principles and circumstances which govern and affect the volatilization of the medicaments employed in inhalation. The nature of some of these is either not understood, or in some cases altogether overlooked. In fact, the chemistry and physics of inhalation have been but little studied by medical men. The chief circumstances to be taken into consideration are: the relative volatility of the substances employed, temperature, relative humidity of the air, the motion of the air, the extent of the surface of exposure, the physical condition of the medicaments themselves, whether in solution or not, whether wholly or only partially dissolved, the nature of the media by which they are held in solution, and, lastly, the manner in which they are inhaled. With respect to volatility, medicaments vary greatly; some pass into a state of vapour rapidly at the ordinary temperature of the air, as alcohol, chloroform, and ether, while others do so only slowly and with difficulty, as carbolic acid, creasote, and thymol. The expression, ordinary temperature of the air, is a very wide one, and may include all degrees of temperature above 32 F., the freezing point, up to 76 F., or summer heat, a range of no less than 4:4: . Now the rate of evaporation of any given substance will vary greatly between this range; it will s much diminished as the lower limit is approached, and still more augmented in proportion as the higher l...

Full Product Details

9781144345622

Table of Contents

Reviews

Author Information

Tab Content 6

Customer Reviews

Recent Reviews

Countries Available