Vetland EX3000, Operator'S Manual

Page: 63 / 88

Useful Information 9-3
Definition of Terms
absorbent - A chemical substance such as Litholyme
TM
that removes carbon dioxide (CO
2
) from the
breathing circuit by a chemical neutralization process which produces carbonates, water, and heat.
absorber system - The components of a rebreathing system designed to remove carbon from patient
exhaled gas. This includes the inspiration and expiration valves, CO
2
absorbent canister, pop-off valve,
breathing bag port, and related tubing.
anesthesia - Partial or complete loss of sensation with or without loss of consciousness induced by an
anesthetic agent.
anesthetic agent - A drug that induces anesthesia.
anesthetic vaporizer - A device that converts a liquid anesthetic into a gas or vapor.
breathing bag - A reservoir in which fresh gas and exhaled gases including CO
2
are stored during
exhalation.
breathing circuit - A system that delivers anesthetic gases from the anesthesia apparatus to the patient
and also transfers exhaled patient gas to the breathing hag; corrugated hoses with 22 mm inner diameter
connections must be used for patient breathing circuits.
cc - cubic centimeter -1/1,000 of a liter; also equal to 1 ml (milliliter).
check valve - A valve used in pneumatic systems that opens to allow gas flow only in one direction.
cmH
2
O - Centimeters of water pressure - A relatively low pressure which is used to measure inspiratory
and sometimes expiratory pressures in the breathing circuit (1 psi = 70.3 cmH
2
0).
CO
2
- carbon dioxide
directional valves - The inspiration and expiration valves present in the patient breathing system.
DISS - Diameter Index Safety System - A threaded connector system for medical gases, which prevents
the incorrect connection of medical gas supply lines to medical gas equipment.
endotracheal adapter - A 15 mm tapered adapter which connects the endotracheal tube to the wye
connector of the patient’s breathing circuit.
endotracheal tube - A tube inserted into the patient’s trachea for ventilation purposes (e.g. the act of
breathing in and out).
expiratory flow rate - The rate at which a gas is exhaled (l/min).
expiratory time - The time that is required to exhale all of the inhaled gas (tidal volume).
expiration valve - A unidirectional valve with a 22 mm outer diameter hose connector which opens only
when the patient exhales.
flush button - A valve located prior to the inspiratory port of the anesthesia apparatus which delivers
approximately 15-18 l/min oxygen flow (on Landmark Veterinary Anesthesia Systems ) to the patient’s
breathing circuit for quick oxygenation, while by-passing the anesthetic vaporizer and any other medical
gases.
fresh gas - The mixture of medical gases and anesthetic vapors to be delivered to the patient
hyperventilation - increased ventilation which results in lower CO
2
levels.
inspiration - The act of breathing in or drawing gas into the lungs.
inspiratory flow rate - The rate at which gas is inhaled (l/min).
inspiration valve - A unidirectional valve with a 22 mm outer diameter hose connector which opens only
when the patient inhales.