초록 ▼

A breathing circuit for providing conduit from a breathing apparatus or anaesthetic device to a patient, the breathing circuit being generally coaxial and including a first flexible tube and a second flexible tube inside the first flexible tube. The first flexible tube has a smooth inner surface and

A breathing circuit for providing conduit from a breathing apparatus or anaesthetic device to a patient, the breathing circuit being generally coaxial and including a first flexible tube and a second flexible tube inside the first flexible tube. The first flexible tube has a smooth inner surface and a reinforcing cord or ribbing along its length and integral around its outer surface. The first flexible tube has a relatively thin wall with the cord, which is preferably in a spiral, providing structural strength or stiffness while retaining flexibility.

대표청구항 ▼

A breathing circuit comprising: a first flexible tube with connection means at each end and a second flexible tube inside said first flexible tube and generally coaxial therewith and attached to said connection means at each end, said first and second flexible tubes providing two passageways between

A breathing circuit comprising: a first flexible tube with connection means at each end and a second flexible tube inside said first flexible tube and generally coaxial therewith and attached to said connection means at each end, said first and second flexible tubes providing two passageways between said connection means, said first flexible tube having means for effecting low compliance both axially and radially including (a) a spiral cord continuously attached along its length and integral with its outer surface and (b) a non-corrugated tube wall, said first flexible tube having a thin wall relative to the thickness of said second flexible tube and a smooth inner surface along its length.