Results 261 to 270 of about 626,371 (315)

Improving Ventilation Rates During Pediatric Cardiopulmonary Resuscitation

Pediatrics, 2022
BACKGROUND Excessive ventilation at rates of 30 breaths per minute (bpm) or more during cardiopulmonary resuscitation (CPR) decreases venous return and coronary perfusion pressure, leading to lower survival rates in animal models.
Jennifer D, Chapman, Andrew S, Geneslaw, John, Babineau, Anita I, Sen   +3 more
openaire   +2 more sources

Field measurement of ventilation rates

Indoor Air, 2015
Ventilation rates have significant impacts on building energy use and indoor contaminant concentrations, making them key parameters in building performance. Ventilation rates have been measured in buildings for many decades, and there are mature measurement approaches available to researchers and others who need to know actual ventilation rates in ...
openaire   +2 more sources

Predicting ventilation rates in hybrid ventilated pig housing facilities

2008 Providence, Rhode Island, June 29 - July 2, 2008, 2008
To determine the emission rates of particulate matter and volatile organic compounds (VOC), the prediction of the air exchange rate of an animal housing facility must be accurate. This applies to mechanically and naturally ventilated facilities or a combination referred to as hybrid ventilation systems (HV) that are becoming common in Quebec ...
null Frédéric Pelletier, null Stéphane P Lemay, null John J.R Feddes, null Stéphane Godbout, null Martin Belzile   +4 more
openaire   +1 more source

How to quantify natural ventilation rate of single-sided ventilation with trickle ventilator?

Building and Environment, 2020
Abstract This study quantifies the natural ventilation rate in single-sided natural ventilation with a trickle ventilator, inserted in a window frame or a shutter box. The seasonal characteristics of natural ventilation in actual residential conditions were examined by long-term field measurements in a multi-residential building during spring and ...
Younhee Choi, Doosam Song
openaire   +1 more source

Gas flow rates through transtracheal ventilation catheters

The American Journal of Emergency Medicine, 2004
The purpose of the study was to measure gas flow rates using different methods of transtracheal ventilation. Wall oxygen flow (WOF) at 10 and 15L/min, and a self-inflating ventilation bag (SIVB) were used to deliver gas flow through three transtracheal catheters: 13, 14, and 16 gauge (5 trials each). WOF mean gas flow rates (L/min) through the 16G, 14G,
Jonathan K, Marr, Loren G, Yamamoto
openaire   +2 more sources

Synchronous Respiration: Which Ventilator Rate Is Best?

Acta Paediatrica, 1987
Twenty‐four infants were ventilated through a series of rates (30, 60 and 120/min), to determine which rate was most successful in provoking synchronous respiration. Their spontaneous respiratory rate was also documented during a temporary disconnection from the ventilator: respiratory rate and gestational age were significantly correlated (r=–0.85 ...
A, Greenough, F, Greenall, H, Gamsu
openaire   +2 more sources

Using Conventional Infant Ventilators at Unconventional Rates

Pediatrics, 1984
The effect of progressive increases in ventilator rate on delivered tidal and minute volumes, and the effect of changing peak inspiratory pressure (Pmax), positive end-expiratory pressure (PEEP), and inspiration to expiration (I:E) ratio at different ventilator rates were examined.
S J, Boros, D R, Bing, M C, Mammel, E, Hagen, M J, Gordon   +4 more
openaire   +2 more sources

Control of Resting Ventilation Rate in Grasshoppers

Journal of Experimental Biology, 1996
ABSTRACT We examined the effect of extracellular acid–base status and tracheal gas levels on the ventilation rate of resting Romalea guttata and Schistocerca americana grasshoppers. We manipulated haemolymph pH and [HCO3- ] within normal physiological ranges using injections of HCl, NaOH, NaHCO3 and NaCl into the haemocoel.
, Gulinson, , Harrison
openaire   +2 more sources

Ventilation rate formula for mechanically ventilated broiler houses considering aerodynamics and ventilation operating conditions

Biosystems Engineering, 2018
Precise ventilation control of broiler houses is essential to effectively exhaust pollutants and attain the required breeding environment. However, the ventilation rate used in practise is always lower than the desired or designed value because of difficulties in measuring the pressure difference between the indoor and outdoor pressure of the facility.
Gwanyong Park, In-bok Lee, Uk-hyeon Yeo, Taehwan Ha, Rack-woo Kim, Sang-yeon Lee   +5 more
openaire   +1 more source

Transfer rates in single-sided ventilation

Building and Environment, 1990
Abstract This paper describes a numerical study of the transfer rates associated with single-sided ventilation. It discusses the relationship between the heat transfer rate across the plane of the window opening and the mean temperature maintained in the room.
M.R. Mokhtarzadeh-dehghan, M.M.M. El Telbany, A.J. Reynolds   +2 more
openaire   +1 more source