Circle System
Laurelyn Drescher
Created on September 28, 2023
The circle system componets and the flow of anesthetic.
Over 30 million people build interactive content in Genially.
Check out what others have designed:
SLYCE DECK
Personalized
LET’S GO TO LONDON!
Personalized
ENERGY KEY ACHIEVEMENTS
Personalized
HUMAN AND SOCIAL DEVELOPMENT KEY
Personalized
CULTURAL HERITAGE AND ART KEY ACHIEVEMENTS
Personalized
DOWNFALLL OF ARAB RULE IN AL-ANDALUS
Personalized
ABOUT THE EEA GRANTS AND NORWAY
Personalized
Transcript
Start
Expiratory Breathing Tube
- The expiratory breathing tube is used to carry gases that are expelled from the patient to the CO2 absorber.
- The breathing tubes can be coaxial tubing which the gases going to the patient flow on the inner tubing and the expiratory gasses go to the CO2 absorber flow, the only disadvantage to this system is the coaxial tubles increase resistance in the breathing system.
- Volatile Anesthetic POV: Unused anesthetic, CO2 produced from the patient, and oxygen he did not use travel the expiratory breathing limb/tube.
SIDE NOTE: Describe the circle system's overall flow by tracking a molecule of volatile anesthetic traveling through the system. *** This is included in each interactive element to make the slide less busy and more condensed and educational. Please follow in order of the red arrow.
Expiratory One-way Valve
- The expiratory one-way valve ensures the gasses flow away from the patient due to having a unidirectional valve.
- The valve is marked with the words inspiration or has a directional arrow.
- Volatile Anesthetic POV: The volatile anesthetic, CO2, and unused oxygen push against the one-way valve causing the disc to lift from the seat and open to let the mixed gases pass the valve. While this valve is open the inspiratory one-way valve closes.
ADJUSTABLE Pressure-limiting Valve
- A spring-loaded device that serves as a gas outlet from the breathing system unless a ventilator is being used.
- The APL valve regulates pressure in the breathing system during spontaneous, controlled, or assisted respiration.
- Volatile Anesthetic POV: When the pressure is high in the resouvoir bag it has nowhere to go and therefore leaves the bag and goes to the APL valve. The APL value is the only gas outlet for expelled gases (i.e. our volatile anesthetic molecule) and sends it to the scavenging system via tubing. However, it does not send all anesthetic out through the APL valve.
Scavenger System
- The scavenging system is a disposal system for mixed gases.
- The APL valve sends the mixed gasses over to the scavenging system through transfer tubing.
- Volatile Anesthetic POV: The anesthetic is transferred through the gas disposal tubing to the gas disposal system, which may be a passive or active removal system.
Inspiratory One-Way Valve
- A unidirectional valve that carries gas flow towards the patient.
- The inspiratory valve is marked with the word inspiration or a directional arrow.
- Volatile Anesthetic POV: The volatile anesthetic in addition to the gas flowing lifts the disc from its seat and then passes the vale to the inspiratory limb/tube.When the inspiratory vavle is open the expiratory valve is closed
Reservoir Bag
- The reservoir is the most distensible part of the breathing system and protects the patient from excessive pressure from the breathing system.
- It allows for gas to accumulate from the patient during exhalation and the bag can be operated manually or controlled by the anesthesia machine.
- Volatile Anesthetic POV: All expired gasses from the patient (CO2, unused anesthetic, unused O2) go to the reservoir bag until the bag is full then it goes to the APL valve.
Fresh Gas Inlet
- Fresh gas inlet may be connected to the common gas outlet through flexible tubing.
- New models have there is a direct connection between the machine outlet and the breathing system.
- Volatile Anesthetic POV: No anesthetic flows through the fresh gas inlet.
Inspiratory Breathing Tube
- Breathing tubes connect to a port on the absorber, and the other side connects to the Y-piece.
- The purpose of the inspiratory breathing tube is to carry the gasses to the patient.
- Volatile Anesthetic POV: The anesthetic in combination makes it's way to the patient.
CO2 Absorbers
- Co2 absorbers help with mainating the respiratory balance of CO2/O2 in the anesthesia gas machine.
- They remove CO2 gas from the anesthesia machine through an exothermic chemical reaction that covers CO2 into carbonic acid and this is the reaction of the CO2 absorbers changing colors.
- Volatile Anesthetic POV: The volatile anesthetic passes through the absorbants. Aborsbants (Soda-lime) and Sevoflurane can cause compound A. Isoflurane and desflurane mixed with absorbents (Soda-lime) can create carbon monoxide.