Medical Gases Lecture Notes

These flashcards cover key concepts and terminology related to medical gases as discussed in the lecture notes.

Oxygen (O2)

Colorless, odorless, transparent, and tasteless therapeutic gas used for patients with hypoxemia.

Air

A colorless, odorless gas mixture containing 20.95% O2 and 78.1% nitrogen, used as a medical-grade gas.

Nitrous Oxide (N2O)

Colorless gas with a sweet odor and taste, used as an anesthetic agent.

Carbon Dioxide (CO2)

Colorless, odorless gas used for calibration of blood gas analyzers.

Helium (He)

Odorless and tasteless gas used therapeutically when mixed with oxygen (Heliox).

Fractional Distillation

Process for separating a mixture into its components based on differences in boiling points.

Joule-Thompson Effect

A process used to liquefy gases through rapid expansion after compression.

Vacuum

Used in medical settings, it refers to the absence of air or gas, essential for certain equipment.

Methemoglobinemia

Condition where blood can't carry oxygen properly, caused by exposure to high nitrous oxide concentrations.

Anesthetic Gases

Gases combined with O2 to provide anesthesia during surgical procedures.

Pin-Index Safety System (PISS)

A system for small gas cylinders to prevent accidental misconnections.

American Standard Safety System (ASSS)

A connection system for large gas cylinders to ensure correct gas source connections.

Diameter-Index Safety System (DISS)

Used for low-pressure gas connectors in medical equipment.

Gas Cylinder

Container for storing and transporting compressed or liquefied medical gases.

Safety Relief Valves

Designed to vent gas to the atmosphere if tank pressure becomes too high.

Cylinder Factors

Values used to calculate the duration of gas flow from a cylinder.

Therapeutic Gases

Gases used to relieve symptoms and improve patient oxygenation.

Heliox

A mixture of helium and oxygen used to manage severe airway obstruction.

Vacuum System

System used for suction in medical settings.

Regulator

Device used to control the pressure and flow of gases to patients.

Flowmeter

Device used to measure and control the flow of gas to a patient.

Fixed Orifice

Component of a flow restrictor that delivers a specific flow at constant pressure.

Bourdon Gauge

Type of flowmeter used under variable pressures, not gravity dependent.

Thorpe Tube

Type of flowmeter that measures true flow and depends on gravity.

Emergency Oxygen Supply

Backup system in healthcare facilities to provide oxygen in case of supply failure.

Cylinder Color Code for O2

Green - Indicating the gas contained in the cylinder.

Cylinder Storage Guidelines

Procedures for safely storing gas cylinders to prevent accidents.

Air Composition

Approximately 21% oxygen and 78% nitrogen; essential for medical air supply.

Oxygen Production Method

Primarily produced through fractional distillation of atmospheric air.

Medical Gases Classification

Includes laboratory, therapeutic, and anesthetic gases.

Toxic Gases

Gases like nitric oxide that can have harmful effects on health.

Compressed Gas

Gas that is kept in a cylinder under pressure for medical use.

Inhalation Therapy

Use of medical gases to treat respiratory conditions.

Gauges and Valves

Components of gas delivery systems for measuring and controlling gas flow.

Flammable Gases

Gases that can ignite and cause combustion; need careful handling.

Clinical Application of CO2

Used for diagnostic purposes in various laboratory settings.

Patient Transport Safety

Procedures to ensure safe use of gases during patient transfers.

Long-term Exposure Risks

Potential health issues arising from prolonged exposure to gases like nitrous oxide.

Nitric Oxide Uses

Approved for treating hypoxic respiratory failure in infants.

Oxygen Enrichment Feature

Important for enhancing oxygen delivery to patients requiring respiratory therapy.

Pressure-Dropping Alarm System

Alarms that notify staff of any pressure drops in the gas supply system.