• Journal of anesthesia · Apr 2019

    The F Breathing Circuit, a universal single-limb breathing circuit: brief historical perspective.

    • Atsuo Fukunaga.
    • Professor Emeritus, Department of Anesthesiology, Harbor-UCLA Medical Center, UCLA School of Medicine, 1000 West Carson Street, Torrance, CA, 90509, USA. fukunagaatsuo@gmail.com.
    • J Anesth. 2019 Apr 1; 33 (2): 317320317-320.

    AbstractThis article presents a brief historical perspective of the F Breathing Circuit, a universal single-limb breathing circuit. The single-limb breathing circuit (tube within a tube configuration) comprises two tubes of sufficient size and compliance, so that either channel enables safe, unrestricted inspiration/expiration at all times in spontaneous and controlled ventilation. The single-limb circuit can function in various modes: as an anesthetic circle circuit as well as a Mapleson-type rebreathing circuit and as a non-rebreathing circuit (e.g., with ICU ventilators) in adult and pediatric patients. Therefore, it qualifies as a universal breathing circuit. Since its first introduction in Japan (1978), which was followed by further modifications and improvements, the circuit was made available in USA and worldwide.

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