Anesthesia Machines and Anesthetic Breathing System
Improving Anesthesia Technical Staff’s Skills, Springer International Publishing Ag, ss.117-123, 2022
- Yayın Türü: Kitapta Bölüm / Araştırma Kitabı
- Basım Tarihi: 2022
- Doi Numarası: 10.1007/978-3-030-88849-7_8
- Yayınevi: Springer International Publishing Ag
- Sayfa Sayıları: ss.117-123
- Anahtar Kelimeler: Absorbents, Anesthesia machine, Breathing systems, Vaporizers, Ventilators
- Sağlık Bilimleri Üniversitesi Adresli: Evet
Özet
Anesthesia machine provides control of patient’s gas exchange. Anesthesia machine reduces the pressure of desired gases to a safe level. The anesthesia machine can be divided into three parts as high, intermediate, and low pressure systems. The high pressure system includes cylinders and pressure regulators. The intermediate pressure system starts from pressure regulators and continues to the flow control valves. The low pressure system contains the flowmeter tubes, vaporizers, unidirectional valves, and components up to the common gas outlet. Modern anesthesia machines have many safety equipment to minimize the risk of hypoxic gas mixture. Vaporizers are the devices which convert liquid anesthetics into vapor and deliver volatile anesthetics to the breathing circuit. Sodalyme and barolyme are the most commonly used absorbents to eliminate CO2. Ventilators are classified as single-circuit and double-circuit systems according to the movement mechanism. Modern ventilators are timed and electronically controlled. Breathing systems are classified as open, semi-open, semi-closed, and closed systems. There is no anesthetic gas reservoir balloon in open systems. It is used with insufflation by open drop or mask method. Semi-open systems are flow-controlled, valve-free, and non-rebreathing systems. There are types as Mapleson A, B, C, D, E, and F. Semi-closed breathing systems are the most commonly used breathing system in adults and older children. In closed systems, the entire volume of expiratory gas returns to the patient after CO2 is absorbed. Today, modern devices with increased safety are used for different patient types.