Intraosseous device for inserting a cannula into a bone
Inventors
Tzachar, Barak • Kalnitskiy, Alexander • Gomberg, Yosef
Assignees
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Publication Number
US-9173679-B2
Publication Date
2015-11-03
Expiration Date
Abstract
The invention relates to a device for the insertion of a cannula into a bone of a patient, which comprises: (a) an activator assembly for activating the device; (b) needle assembly which comprises a stylet and cannula; (c) barrel assembly for containing said stylet and cannula in a loaded state prior to the device activation; and (d) a setting assembly for adjusting the penetration depth of said cannula into the patient's bone.
Core Innovation
The invention relates to an intraosseous cannula-stylet injection device for the insertion of a cannula into a bone of a patient. The device includes an activator assembly for activating the device, a needle assembly which comprises a stylet and cannula, a barrel assembly for containing said stylet and cannula in a loaded state prior to device activation, and a setting assembly for adjusting a penetration depth of said cannula into the patient's bone.
A central aspect of the device is that erroneous activation is prevented by multiple safety mechanisms. The activator assembly comprises a first safety mechanism in a form of a safety catch that prevents activation unless said safety catch is released. The activator assembly also comprises a trigger that triggers activation only if pulled toward a proximal direction, while pulling to a distal direction is prevented, thereby eliminating reverse direction activation.
In addition, a second safety mechanism prevents activation by locking it unless the setting assembly is pushed against the patient's body, thereby causing closure of a gap in the device between a jacket located in said barrel assembly and said activator assembly. The device includes spring/hammer-driven needle insertion, leaving the setting assembly on the patient after activation to stabilize the cannula, and removing the stylet so that a channel to the medullary cavity remains for fluid administration or marrow sampling.
Claims Coverage
The independent claim defines a cannula insertion device with four core assemblies and activation gated by three distinct safety mechanisms. Inventive features are centered on a released safety catch, directional triggering that prevents reverse activation, a lock condition dependent on pushing the setting assembly against a patient's body to close a gap, and penetration depth adjustment via the setting assembly.
Safety catch release prevents activation
Said activator assembly comprises a first safety mechanism in a form of a safety catch that prevents activation of the device unless said safety catch is released.
Proximal-only directional trigger eliminates reverse activation
Said activator assembly comprises a trigger that triggers activation of the device only if pulled toward a proximal direction, while pulling to a distal direction is prevented, thereby eliminating reverse direction activation.
Body-contact locking closes a gap to allow activation
The device comprises a second safety mechanism that prevents activation of the device by locking it unless said setting assembly is pushed against a patient's body, thereby causing closure of a gap in the device between a jacket which is located in said barrel assembly and said activator assembly.
Setting assembly adjusts cannula penetration depth
A setting assembly for adjusting a penetration depth of said cannula into the patient's bone.
Overall claim coverage centers on an intraosseous cannula insertion device with an activator assembly gated by a released safety catch, a proximal-only trigger to eliminate reverse direction activation, and a second safety mechanism that locks activation until the setting assembly is pushed against a patient's body to close a gap. Penetration depth adjustment is provided by the setting assembly.
Stated Advantages
Prevents activation of the device unless the first safety catch is released.
Eliminates reverse direction activation by allowing triggering only when pulled toward a proximal direction.
Prevents activation by locking it until the device is properly placed against the patient's body, making the device ready for activation only when placed properly.
Documented Applications
Fluid administration into a medullary cavity via a channel formed after stylet removal.
Bone marrow sampling via a channel to the medullary cavity formed after stylet removal.
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