| 摘要 |
1,255,849. Suction catheter. BECTON, DICKINSON & CO. 12 March, 1969 [12 March, 1968], No. 13128/69. Heading A5R. [Also in Division F2] A suction catheter 10, Fig. 1, for the removal of liquids from body cavities, comprises a flexible, elongated catheter tube 26, an adaptor 12 with an open upper end and a closed lower end 20, the adaptor having two fluid ports, one, 16 connected to a vacuum source (not shown) and the other 18 connected to the catheter tube 26, a valve key 14, Fig. 2, fitting within the adaptor having two ports 42, 44 at its lower side and a port open to the atmosphere at its upper end, so that in one position the port leading to the catheter is closed, and the vacuum port is in contact with the atmospheric port, and in another position, both the catheter and vacuum ports are in contact with the atmospheric port. The atmospheric port is finger-engageable, so that with a finger closing that port, the full vacuum is exerted on the catheter in the second open, position. The valve key may be rotatable within the adaptor body through approximately 90‹, or it may be axially displaceable as in Figs. 14, 15 (not shown). The axially displaceable element may have resilient biasing means, Figs. 16, 17 (not shown) for maintaining the catheter port normally closed. |
