| 摘要 |
A directional application system for applying materials such as biopolymers and fibrin sealants to a desired internal site in a human or animal within a range of angular directions includes a source of the materials and an endoscopic delivery device to deliver the materials from a source or sources of the materials and from a nozzle end to the tissue. The device includes an inner tube of resilient material to which, at a first end, the materials are supplied and having a nozzle at a second end. The second end is bent by the self-tension in the walls of the inner tube to the maximum angle within the desired range of directions. An outer tube of a material more rigid than the inner tube slidingly encases the inner tube. As the inner tube is pulled through or pushed out of the rigid outer tube and handle by the sliding handle, the nozzle end will bend less or more in accordance with the length of the inner tube projecting from the end of the rigid tube, to thereby change the direction in which the materials can be deposited from the nozzle.
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