MANIFOLD FOR FILLING PLURAL CANNULAE, THE MANIFOLD INCLUDING ROTATING FITTINGS THAT CLOSE WHEN A CANNULA IS REMOVED FROM THE FITTING AND THAT OPEN WHEN A CANNULA IS ATTACHED TO THE FITTING

摘要

A manifold for loading plural cannulae with a substance The manifold includes a housing with a plurality of channels that route the flow of the mixed substance from a single central channel to multiple sub-channels for the simultaneous filling of attached cannulae. Each sub-channel extends to a fitting to which a cannula may be attached. The fittings are rotatably mounted to the housing. A lock assembly holds the cannulae to the individual fittings are so that when a cannula is removed from a fitting, the fitting rotates so as to close the fluid path from the sub-channel. In order to attach a second cannula to the same fitting the lock system requires the fitting to be rotates into a position in which the fluid communications path from the associated sub-channel is reopened.

主权项

1. An assembly for loading cannulae with a substance that is injected into living tissue, the assembly including:
a shell, said shell defining a reservoir in which the substance for injection to living tissue is held, said shell having opposed proximal and distal ends and being open at the distal end; a piston that is moveably mounted to the shell so as to move proximally to distally through the reservoir so as to force the substance out of the opening in the proximal end of the shell; and a manifold is attached to said shell, said manifold including:
a housing, said housing: having an inlet opening for receiving the substance ejected from the shell reservoir proximal end opening; a plurality of channels that branch away from the inlet opening so that the substance introduced through the inlet opening simultaneously flows through the channels wherein the channels have separate outlet openings;a plurality of fittings attached to the housing, wherein each said fitting is located adjacent a separate one of the channel outlet openings; is configured to removably receive a cannula configured for insertion into a living being; shaped to define a lumen that extends to the cannula received by said fitting and further shaped so that when the said fitting is in a first rotational orientation relative to the housing, the fitting lumen is in not in fluid communication with the outlet opening of the adjacent channel and, when the said fitting is in a second rotational orientation relative to said housing, the fitting lumen is in fluid communication with the outlet opening of the associated housing channel; and a lock assembly attached to said housing that is connected to cannualae connected to said fitting that is configured to releasably lock the cannulae to said housing such that:
when said lock assembly locks a cannula to said housing said lock assembly causes the cannula to rotate said fitting to the second rotational orientation; andwhen said lock assembly is set to release the cannula said housing, said lock assembly causes the cannula to rotate the said fitting from the second rotational orientation to the first rotational orientation.