Fluid flow control device with retractable cannula
A device having a housing; a cannula projecting forwardly from the housing; a connector useful for attaching the device to a fluid source or receptacle; a fluid flow path establishing fluid communication between the cannula and the connector; a retraction mechanism biasing the cannula away from its projecting position; and an actuator supported by the housing and configured to modify the fluid flow path so as to terminate fluid flow through the device, seal off the fluid flow path, and release the retraction mechanism to retract the cannula into the housing. The subject device is particularly preferred for use in the medical field, for example, as part of an infusion set or as a collection device for blood, or other fluids or flowable matter.
1. A device comprising:
a housing;
a cannula;
a connector attachable to a fluid source or a receptacle external to the device;
a fluid flow path in fluid communication with the connector;
a retraction mechanism biasing the cannula rearwardly;
a retraction cavity having a front portion, wherein the retraction cavity is connected to the housing such that at least the front portion of the retraction cavity can move laterally from a first position to a second position, and wherein the retraction mechanism is separate from and not coaxial with the fluid flow path;
wherein when the front portion of the retraction cavity is in the first position, the cannula projects forwardly from the housing, the cannula is in fluid communication with the connector through the fluid flow path, and the retraction cavity is not coaxial to or aligned with the cannula;
wherein when the front portion of the retraction cavity is in the second position, the front portion of the retraction cavity is aligned with the cannula and the retraction mechanism retracts the cannula into the retraction cavity such that the cannula no longer projects forwardly from the housing and the cannula is no longer in fluid communication with the connector.
2. The device of claim 1 further comprising at least one sealing element configured to prevent fluid leakage into or out of the fluid flow path.
3. The device of claim 1 wherein at least a portion of the retraction activity is slidably disposed within the housing.
4. The device of claim 1 wherein the retraction cavity is pivotally connected to the housing.
5. The device of claim 1 wherein the fluid flow path is substantially parallel to the retraction cavity.
6. The device of claim 1 wherein the entire retraction cavity is moved laterally to move the front portion from the first to the second portion.