An anesthesia vaporizer system includes a vaporizer reservoir forming a sump chamber containing a liquid anesthetic agent, a piston that forms a first chamber on a first side of the piston. The vaporizer reservoir has a fill port configured to receive a refill container containing liquid anesthetic agent and to permit flow into the first chamber. A motor moves the piston between a first position and a second position, wherein the volume of the first chamber increases as the piston moves from the first position towards the second position. The liquid anesthetic agent is thereby drawn from the refill container into the first chamber. A transfer valve is configured to permit the liquid anesthetic agent to flow from the first chamber into the sump chamber. An outlet port delivers the liquid anesthetic agent from the sump chamber into a vaporizing system that vaporizes it for delivery to a patient.

Methods and systems are provided for delivering anesthetic agent to a patient. In one embodiment, a system includes an anesthetic agent reservoir, a pump fluidically coupled to the agent reservoir, an injector configured to receive pressurized anesthetic agent from the pump, a vaporizer comprising a heated chamber configured to receive and vaporize the anesthetic agent injected by the injector and supply a mix of the vaporized anesthetic agent and medical gas to a subject via a supply line, and a controller. The controller stores instructions executable to determine a concentration of the vaporized anesthetic agent in the mix and adjust one or more injector parameters based on a difference between the concentration of the vaporized anesthetic agent and a commanded concentration.

A connecting valve structure and an anesthetic filling system are provided. When a valve core assembly is in the open state, a pipe and a filling port are in seal fit, besides, the connecting ring, the seal pipe, and the drug guiding pipe are integrated as a whole, when the seal pipe is inserted into or pulled out of the filling port of the evaporator, no BHT exudate occurs. In addition, an inner pipe wall of the seal pipe, a surface of the connecting ring facing towards a first pipe end, and an outer pipe wall of the drug guiding pipe opposite to the seal pipe together form a pressure stabilizing groove which is used to equilibrate pressure in the container and the evaporator during the open state.

The present invention provides a new inhaler device for the storage and administration of inhalable liquids to a patient, such as halogenated volatile liquids, particularly methoxyflurane for use as an analgesic, the device having one or more advantages or improvements over known inhalers.

An anesthetic delivery system for use in conjunction with an anesthetic return system for reutilizing anesthetic exhaled by a subject, the system including a measurement system operatively connected to a breathing circuit for continuously measuring at least one flow parameter and anesthetic content of a gas stream reaching the subject and a control system for receiving input from the measurement system and controlling the amount of anesthetic entering the system, the control system including an input device for inputting a setting that corresponds to a desired amount of anesthetic in the gas stream reaching the subject, and utilizing a control algorithm for controlling the amount of anesthetic entering the system based on said desired amount of anesthetic, and flow and anesthetic content parameters as determined by the measurement system, such that the control algorithm is adapted to supplement anesthetic already in gas stream flowing to the subject to attain a level of anesthetic reaching the subject that correspond to the desired amount set via the input device.

An anesthetic evaporator is provided. The anesthetic evaporator includes a housing, an anesthetic agent storage tank, a cover, a mechanical pressure relief assembly connected with the anesthetic agent storage tank, and a linkage mechanism. The mechanical pressure relief assembly is provided with a first state in which a pressure within the anesthetic agent storage tank is maintained and a second state in which a pressure within the anesthetic agent storage tank is released. When adding an anesthetic agent, an operation action on the anesthetic evaporator drives the linkage mechanism, and the linkage mechanism drives the mechanical pressure relief assembly to be switched from the first state to the second state.

An anesthetic tank includes an insertion mouth for inserting an injection adapter of an anesthetic container, and a storage portion communicating with the insertion mouth. A volatile anesthetic inside of the anesthetic container is injected into the storage portion. An identifying member is arranged on the outside of the insertion mouth and is rotatable around the center axis of the insertion mouth. The identifying member has key groove formed in the internal surface of an insertion hole for inserting the injection adapter. The key groove are used for identifying the type of the volatile anesthetic in collaboration with keys formed in the injection adapter. A cover member has an opening formed in the position facing the insertion mouth and the insertion hole and presses the peripheral part of the identifying member.

An anesthetic tank includes an insertion mouth for inserting an injection adapter of an anesthetic container, and a storage portion communicating with the insertion mouth. A volatile anesthetic inside of the anesthetic container is injected into the storage portion. An identifying member is arranged on the outside of the insertion mouth and is rotatable around the center axis of the insertion mouth. The identifying member has key groove formed in the internal surface of an insertion hole for inserting the injection adapter. The key groove are used for identifying the type of the volatile anesthetic in collaboration with keys formed in the injection adapter. A cover member has an opening formed in the position facing the insertion mouth and the insertion hole and presses the peripheral part of the identifying member.

The present invention provides a new inhaler device for the storage and administration of inhalable liquids to a patient, such as halogenated volatile liquids, particularly methoxyflurane for use as an analgesic, the device having one or more advantages or improvements over known inhalers.

Disclosed is an anesthetic evaporator, including a housing, a drug reservoir, and a cover movably connected to the housing. The drug reservoir is provided with a drug adding barrel arranged corresponding to the cover, and further includes a mechanical pressure relief assembly and a linkage mechanism. The mechanical pressure relief assembly is connected to the drug reservoir. The mechanical pressure relief assembly has a first state in which the pressure within the drug reservoir is maintained and a second state in which the pressure within the drug reservoir is released. When adding a drug, the operation action on the anesthetic evaporator drives the linkage mechanism, and the linkage mechanism drives the mechanical pressure relief assembly to switch same from the first state to the second state. The pressure of the anesthetic evaporator can be mechanically released, making it more reliable