초록 ▼

Breathing circuits for medical respiratory devices which have an inspiratory conduit for delivery of respiration-related aeriform substances to a patient, may also have a expiratory conduit, and, in any case are arranged to communicate with a patient interface, such as a wye (14), and have heating m

Breathing circuits for medical respiratory devices which have an inspiratory conduit for delivery of respiration-related aeriform substances to a patient, may also have a expiratory conduit, and, in any case are arranged to communicate with a patient interface, such as a wye (14), and have heating means for respiration-related aeriform substances in at least the inspiratory conduit. The heating means may be a heated-liquid heating tube (11) within at least the inspiratory conduit or an electrical heating wire (38) on or in an inspiratory conduit comprising respiratory hose (37). The tube is in circulatory relationship with a heated-liquid reservoir (13) and is arranged internally to contain heated liquid (30) from the reservoir, and to transfer heat from the liquid--by radiation and conduction from the tube wall--to the substances in the conduit. This transferred heat tends to inhibit or to control formation of dangerous aqueous condensate from the substances by compensating heat losses they otherwise sustain, enhancing their capacity to retain water vapor and providing an intra-conduit environment in which the condensate is unlikely to form. A manifold (12) enables the tube to extend to the expiratory conduit.

대표청구항 ▼

[ What is claimed is:] [1.] A breathing circuit of a respiratory device with inspiratory and expiratory conduits providing a flow path and with the improvement comprisinga heating tube within a portion of each conduit, anda manifold includinga cross member definingexterior wall portions, andan inter

[ What is claimed is:] [1.] A breathing circuit of a respiratory device with inspiratory and expiratory conduits providing a flow path and with the improvement comprisinga heating tube within a portion of each conduit, anda manifold includinga cross member definingexterior wall portions, andan interior wall within the exterior wall portions, said interior wall being a common wall for the conduits, and defining a port in the common wall for transit of the heating tube from one conduit to the other conduit;an inspiratory side portion on the cross member and defining walls for the inspiratory conduit and up-path and down path openings; and,an expiratory side portion on the cross member and defining walls for the expiratory conduit and up-path and down-path openings.