Abstract: An adaptor for use on an anesthesia machine having of three or more vaporizer units removably mounted thereon by an interlock/exclusion system. The interlock/exclusion system includes plural vertically oriented pins that are coupled together and are operative to move upward prevent opening of any vaporizer units if one is open. One of the vaporizer units includes a horizontally oriented pin which moves outward when that unit is opened. The adaptor is arranged to mount that vaporizer on the machine and to couple the horizontally oriented pin to an associated vertically oriented pin of the interlock/exclusion system.

Abstract: A gas administration apparatus, e.g., anesthesia machine, making use of three or more gas flow, e.g., vaporizer, units removably mounted thereon by an interlock exclusion system. The interlock/exclusion systems is operative to prevent opening of any gas flow unit if one gas flow unit is already open and irrespective of how many gas flow units are mounted on the apparatus at the time.

Abstract: A gas administration apparatus, e.g., anesthesia machine, making use of three or more gas flow, e.g., vaporizer, units removably mounted thereon by an interlock exclusion system. The interlock/exclusion systems is operative to prevent opening of any gas flow unit if one gas flow unit is already open and irrespective of how many gas flow units are mounted on the apparatus at the time.

Abstract: A ventilation sound detection system includes an audible display that emits a series of sounds based upon information provided by a ventilator. In particular, there are two different sound patterns emitted by the system. One sound represents inspiration and the other sound represents expiration. The inspiration sound is enunciated when monitored breathing pressure crosses a threshold level, thereby communicating to an anesthesiologist/clinician that a significant pressure has been developed in the breathing circuit (e.g., a proper inspiration breath has been taken by the patient). The exhalation sound is enunciated when the rising edge of a valid CO2 breath has been returned to the breathing circuit (e.g., a proper exhalation breath has been made). Accordingly, the system provides the anesthesiologist/clinician with a new way of verifying that the patient is being properly ventilated. Therefore, ventilation changes or problems can be identified quickly and effectively.

Abstract: A ventilation sound detection system includes an audible display that emits a series of sounds based upon information provided by a ventilator. In particular, there are two different sound patterns emitted by the system. One sound represents inspiration and the other sound represents expiration. The inspiration sound is enunciated when monitored breathing pressure crosses a threshold level, thereby communicating to an anesthesiologist/clinician that a significant pressure has been developed in the breathing circuit (e.g., a proper inspiration breath has been taken by the patient). The exhalation sound is enunciated when the rising edge of a valid CO2 breath has been returned to the breathing circuit (e.g., a proper exhalation breath has been made). Accordingly, the system provides the anesthesiologist/clinician with a new way of verifying that the patient is being properly ventilated. Therefore, ventilation changes or problems can be identified quickly and effectively.

Abstract: The magnetic shield preferably encloses circuitry connected to equipment in a high magnetic field (e.g., two transformers of a gas flow transducer in an MRI suite). The magnetic shield is preferably oriented so that its long axis is aligned with the axis of maximum magnetic sensitivity of the enclosed circuitry. The shield shunts external magnetic flux around the enclosed circuitry to protect the circuitry from saturation in the high magnetic field. The shield is preferably made from hot rolled low carbon steel which has relatively low permeability and saturates slowly. The physical size and construction of the shield reduces magnetic flux within the shield with a minimal amount of iron. In another embodiment, a magnetic field sensor is mounted within the shield to measure the magnetic field affecting the enclosed circuitry. The sensor is coupled to an external circuit which indicates when the magnetic flux is strong enough to affect the operation of the enclosed circuitry.

Abstract: The magnetic shield preferably encloses circuitry connected to equipment in a high magnetic field (e.g., two transformers of a gas flow transducer in an MRI suite). The magnetic shield is preferably oriented so that its long axis is aligned with the axis of maximum magnetic sensitivity of the enclosed circuitry. The shield shunts external magnetic flux around the enclosed circuitry to protect the circuitry from saturation in the high magnetic field. The shield is preferably made from hot rolled low carbon steel which has relatively low permeability and saturates slowly. The physical size and construction of the shield reduces magnetic flux within the shield with a minimal amount of iron. In another embodiment, a magnetic field sensor is mounted within the shield to measure the magnetic field affecting the enclosed circuitry. The sensor is coupled to an external circuit which indicates when the magnetic flux is strong enough to affect the operation of the enclosed circuitry.