초록 ▼

A multi-lumen coaxial catheter and method for making such a catheter are provided. The catheter includes three generally coaxially disposed catheter tubes having proximal and distal portions and defining three coaxial lumens. The distal portions are attached to the proximal portion of a sleeve. The

A multi-lumen coaxial catheter and method for making such a catheter are provided. The catheter includes three generally coaxially disposed catheter tubes having proximal and distal portions and defining three coaxial lumens. The distal portions are attached to the proximal portion of a sleeve. The distal portion of the sleeve extends outwardly from the proximal portion of the sleeve around the inner catheter tube to form a tip. The proximal portions of the catheter tubes are attached to a hub having passageways in fluid communication with the lumens extending longitudinally within the catheter tubes. The passageways are further in fluid communication with extension tubes also attached to the hub.

대표청구항 ▼

[ I claim:] [1.] A multi-lumen catheter having a generally coaxial lumen configuration in use, comprising:(a) a first catheter tube having a proximal portion and a distal portion and defining a first lumen extending longitudinally within the catheter from a proximal end to a distal end of the first

[ I claim:] [1.] A multi-lumen catheter having a generally coaxial lumen configuration in use, comprising:(a) a first catheter tube having a proximal portion and a distal portion and defining a first lumen extending longitudinally within the catheter from a proximal end to a distal end of the first catheter tube;(b) a second catheter tube having a proximal portion and a distal portion and disposed generally coaxially around the first catheter tube, the first and second catheter tubes defining an annular second lumen extending longitudinally within the catheter from a proximal end to a distal end of the second catheter tube;(c) a third catheter tube having a proximal portion and a distal portion and disposed generally coaxially around the second catheter tube, the second and third catheter tubes defining an annular third lumen extending longitudinally within the catheter from a proximal end to a distal end of the third catheter tube;(d) a sleeve having a distal portion and a proximal portion, the proximal portion of the sleeve being attached to the distal portions of the first, second and third catheter tubes to hold the first and second catheter tubes within the third catheter tube and to seal the second and third lumens in the distal portions of the second and the third catheter tubes, the third lumen being sealed proximally to the second lumen, the distal portion of the sleeve extending outwardly from the proximal portion of the sleeve to the distal end of the first catheter tube and forming a tip around the distal end of the first catheter tube;(e) a first opening extending transversely through the third catheter tube, the sleeve and the second catheter tube and in fluid communication with the second lumen;(f) a second opening extending transversely through the third catheter tube and in fluid communication with the third lumen, the second opening being proximal to the first opening;(g) a third opening extending through the distal portion of the sleeve and influid communication with the first lumen;(h) a hub having a plurality of passageways, each of the passageways being in fluid communication with one of the first, second and third lumens; and(i) a plurality of extension tubes, each of the extension tubes being in fluid communication with each of the passageways in the hub.