1 edition of Ventilation design handbook on animal research facilities using static microisolators found in the catalog.
|Statement||Farhad Memarzadeh, principal investigator, Division of Engineering Services, Office of Research Services, Office of the Director, National Institutes of Health, Bethesda, Maryland, September 1998|
|Contributions||National Institutes of Health (U.S.). Division of Engineering Services|
|The Physical Object|
|Pagination||2 v. :|
Discussion of acquisition and operation of an industrial ventilation system from developing the initial design requirements to successful system maintenance and operation that keeps the system within design parameters. Various types of heating equipment may be included in ventilation, but they need to perform well in dusty and corrosive atmospheres. Designers should consider that equipment must repay costs through improved economic productivity. Particulate levels in swine buildings have been measured to range from 0. Some animal workers wear personal protection devices appropriate masks to reduce inhaled particulates.
Therefore, a more appropriate animal model would be one raised and living in an enriched environment Smith and Corrow ; Arranz et al. The emphasis throughout the book is on presenting material in a reader-friendly, practical style incorporating numerous figures and tables. The energy exchange between an animal and various areas of the environment is illustrated in Figure 3. There are many ways to enrich animals because animals have a variety of behaviors to fulfill.
The increased use of ventilated racks for housing rodents has raised concerns about the potential for higher airflow to cause dehydration Bekkevold et al. Recommended cage sizes for rodents are primarily based on the weight of the animal and the numbers of animals per cage; however, as cage density increases, cage change frequency must also increase to prevent accumulation of waste gases Gonder and Laber ; Rosenbaum et al. Evaporative Cooling Supplemental cooling of animals in intensive housing conditions may be necessary during heat waves to prevent heat prostration, mortality, or serious losses in production and reproduction. Both of these configurations provide excellent bioprotection for the majority of rodent pathogens and allergens, although they do not provide appropriate guarantees of protection of the worker from possibly infectious zoonotic pathogens or from exposure to chemical contaminants, such as isoflurane.
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The emphasis throughout the book is on presenting material in a reader-friendly, practical style incorporating numerous figures and tables.
The use of IVC systems and isolators may remove the requirement for the high level of air changes for the control of odors and dander, especially if the racks exhaust directly into the building exhaust. When working with agents that are listed at biosafety level 2 or higher, a changing station will not provide sufficient personnel protection and a biological safety cabinet BSC should be used.
Respirable dust concentration should be kept below 0. Mechanical Refrigeration Mechanical refrigeration can be designed for effective animal cooling, but it is considered uneconomical for most production animals. The general consensus within the laboratory animal community is that PPE is important; however, recent discussion regarding PPE has focused on determining what amount of PPE is essential for disease control versus what is worn as part of historical practices ACLAM The animal visitors were also comfortable in the winter because of a radiant heating system installed throughout the kennel area consisting of a Triangle Tube Prestige Solo condensing boiler and an Uponor in-floor polyethylene PEX-a tubing system.
The use of closed-top or specialized caging systems to maintain barrier classifications for rodent housing has implications for water delivery and consumption. InPrincipal-in-Charge Marie S.
When pads are not used in cool weather, they should be sealed to prevent dusty inside air from exhausting through them. His initiative, interest, and efforts far surpassed my expectations. In addition, specialized caging and equipment, such as ventilated racks, flexible film, or hard-sided isolators, may be utilized to create a barrier within a specific area of an animal facility Hessler Methods of removing contaminants from the air are essentially limited to particulate removal, because gas removal methods are often too costly for animal facilities.
Continual improvements in understanding and technology should be used to reduce and refine animal use Russell and Burch Engineers, likewise, must balance costs of modifying the environment against potential economic losses incurred through plants or animals kept in a less than ideal environment.
Most groundwater in the United States contains significant levels of calcium, magnesium, or iron, which may cause mineral scale to develop within pipes or sipper tubes. It is also beneficial for swine boars and gestating sows. All feces and urine are collected over a period of time, generally 24 hours.
Providing high levels of ventilation can be costly in winter, can create drafts on the animals, and can increase the release of gas contaminants by increasing air velocity across the source.
The most serious problem encountered with evaporative pads for agricultural applications is clogging by dust and other airborne particles. The enthalpy wheel enables the system to recover up to 80 percent of the heating and cooling energy contained in the exhaust air and also removes humidity from the outside air in the summer prior to passing through the cooling coil, therefore reducing the tonnage necessary for cooling.
Bond et al. The undersurface should be painted a dark color to prevent multiple reflection of shortwave energy onto animals under the shade. Although it has been assumed that a standardized environment results in standardized animals, the concerns with this assumption are demonstrated repeatedly in colonies of genetically identical rodents where there are behavioral differences in incidence of maternal cannibalism, fighting, and self-destructive compulsive behaviors.
Water may be supplied to cages by water bottles, pouches i. Odors from animal facilities are an increasing concern, both in the facilities and surrounding areas. Materials or supplies that are cleaned or set up outside of the barrier may be wrapped or autoclaved for transport into the barrier.This new edition of Understanding Mechanical Ventilation: a Practical Handbook familiarizes physicians, nurses and respiratory technologists with the concepts that underlie mechanical ventilation.
Physiological concepts are stressed throughout this book in order to address the specifics of mechanical ventilation, while currently accepted. Jan 20, · Industrial Ventilation Design Guidebook [Howard D. Goodfellow, Esko Tahti] on atlasbowling.com *FREE* shipping on qualifying offers.
The Industrial Ventilation Design Guidebook addresses the design of air technology systems for the control of contaminants in industrial workplaces such as factories and manufacturing plants. It covers the basic theories and science behind the /5(4). Description: ERRATA Errata Listing (as of 09/28/) Errata Listing (as of 08/13/) Since its first edition inIndustrial Ventilation: A Manual of Recommended Practice has been used by engineers, regulators and industrial hygienists to design and evaluate industrial ventilation systems.
Nov 26, · The aim of this study was to test the hypothesis that a new mode of ventilation (pressure-regulated volume control; PRVC) is associated with improvements in respiratory mechanics and outcome when compared with conventional volume control (VC) ventilation in patients with acute respiratory failure.
We conducted a randomised, prospective, open, cross over trial on 44 patients with acute. Why is it important to use natural ventilation in building design?
The added oxygen content keeps occupants more awake. Natural ventilation can carry pleasant smells from outside. And the experience of air movement from the exterior is a reminder of the larger world around us. Troubleshooting Natural Ventilation Systems - Livestock Industry Facilities and Environment Jay Harmon, Steven Hoff Get details on using these four tools for trouble-shooting natural ventilation systems: a hi-low thermometer, a relative humidity sensor, ventilation smoke tubes, and your sensory perceptions.