Abstract: Apparatus for analyzing fluid supplied to it through a tube, comprising an analyzing instrument within an enclosure, a first connector attached to the tube and having an end face, a second connector, mating with the first connector and attached to the enclosure, a pair of optical fibers disposed inside the enclosure, a first end of each of the fibers is mounted in the second connector, there is a clear optical path between the end face of each of the first ends of the fibers and at least one common point on the end face. A light source is optically coupled to the second end of a first one of the pair of fibers, and a light detector optically coupled to the second end of the second one of the pair of fibers.

Abstract: A nasal/oral cannula for the collection of exhaled gases from the nostrils of a patient, made up of two nasal prongs for insertion into the patient's nostrils and a collection tube for the collection of the exhaled gases, the nasal prongs and the collection tube being connected at a single junction, such that the exhaled gases flow freely from the nasal prongs to the collection tube. An oral prong can also be provided, whose end is placed near the oral cavity of the patient, the oral prong too being connected at the single junction of the nasal prongs and the collection tube.

Abstract: A nasal/oral cannula for the collection of exhaled gases from the nostrils of a patient, made up of two nasal prongs for insertion into the patient's nostrils and a collection tube for the collection of the exhaled gases, the nasal prongs and the collection tube being connected at a single junction, such that the exhaled gases flow freely from the nasal prongs to the collection tube. An oral prong can also be provided, whose end is placed near the oral cavity of the patient, the oral prong too being connected at the single junction of the nasal prongs and the collection tube.

Abstract: A multiple channel sample port for an airway adaptor, which includes a substantially spherical projection with a plurality of inlet tubes and an outlet, which is designed to be placed substantially within the main channel of the airway adaptor through an opening in the side wall of main channel of the airway adaptor. The outlet is connected to, or integrally formed with, one end of a substantially cylindrical chamber. The opposite end of the substantially cylindrical chamber is adapted to be connected to a gas analyzer. When a pressure reduced below atmospheric pressure is applied at the gas analyzer, gas flows from the main channel of the airway adaptor into the inlets of the substantially spherical projection, through the spherical projection into the substantially cylindrical projection, and from thence to the gas analyzer.