Cannula deployment mechanism
AssigneeBecton, Dickinson and Company
InventorsRussell COLE, Alyssa JACKSON
Life of this patent
Estimating the term…
Abstract
A cannula insertion device is disclosed. The device includes a needle carriage, a rail device on which the needle carriage is slidable, a yoke having a channel, a linkage connected to the needle carriage and extending into the channel, a torsion spring with one end connected to the linkage, and locking device for locking the torsion spring in tension and maintaining the needle carriage and the linkage in a locked position prior to activation. Upon release of the locking device, the tension of the torsion spring is released, which causes the linkage to move in the channel and slide the needle carriage along the rail device. A catheter carriage may also be provided for actuation by the linkage.
Claims26
A cannula insertion device comprising:
- a first carriage comprising a cannula;
- a yoke comprising a channel;
- a linkage connected to the first carriage and extending into the channel;
- a spring with one end connected to the linkage;
- and
- a locking device for locking the spring in tension, the first carriage, and the linkage prior to activation;
- wherein upon release of the locking device, the tension of the spring is released to cause the linkage to move in the channel and slide the first carriage toward an infusion site.
A patch pump comprising:
- a reservoir;
- a pump;
- a cannula insertion device powered by a torsion spring for inserting an introducer needle and a catheter into an infusion site and for retracting the introducer needle while the catheter remains inserted into the infusion site;
- wherein infusate from the reservoir is pumped by the pump into the infusion site after the catheter is inserted into the infusion site.
A method for operating a cannula insertion device, comprising:
- providing a first carriage comprising a cannula, a yoke comprising a channel, a linkage connected to the first carriage and extending into the channel, a spring with one end connected to the linkage, and a locking device;
- tensioning the spring;
- resting another end of the tensioned spring on a part of the device;
- causing the locking device to lock the yoke and linkage after the spring is tensioned;
- releasing the locking device to release the tension on the spring and allow the linkage to move in the channel and move the first carriage toward an infusion site.
Dependencies are inferred from the claim text.