Anaesthetic system which is automatically switched to temporary operation as an open breathing system upon a change in an anesthetic, and method for operating same
AssigneeSiemens Elema AB
InventorsAnders Lekholm, Leif W.ang.rd
Life of this patent
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Abstract
An anaesthetic system, which can be switched between an open system and a rebreathing system, includes a breathing circuit, a setting unit and a switching unit. When the breathing circuit is connected as a rebreathing system and a change in anaesthetic concentration or a change of anaesthetic type is initiated via the setting unit, the switching unit automatically sets the breathing circuit as an open system for a predetermined period of time, at the end of which the breathing circuit is automatically reset as a rebreathing system.
Claims9
In an anesthetic system comprising a breathing circuit, switching means for switching said breathing circuit between operation as an open system and operation as a rebreathing system, and setting means for setting a type of anesthetic and an anesthetic concentration, the improvement comprising:
- said setting means being connected said switching means and said setting means comprising means, when said breathing circuit is being operated as a rebreathing system, for automatically causing said switching means to switch said breathing circuit for operation as an open system for a predetermined period of time when a change in anesthetic is initiated via said setting means, and for automatically causing said switching unit to switch said breathing circuit back to operation as a rebreathing system after the expiration of said predetermined period of time.
A method for operating an anesthetic system having a breathing circuit comprising the steps of:
- providing an anesthetic system comprising a breathing circuit and switching means;
- operating said breathing circuit as a closed system and administering anesthetic, via said breathing circuit, to a patient connected to said breathing circuit;
- initiating a change in anesthetic;
- upon said change in anesthetic, said switching means automatically switching said breathing circuit for operation as an open system for a predetermined period of time;
- and
- after expiration of said predetermined period of time, said switching means automatically resetting said breathing circuit for operation as a closed system.
Dependencies are inferred from the claim text.