Abstract: Manually driven intraosseous devices and associated methods are disclosed. The intraosseous device includes a housing and a transmission at least partially disposed within the housing. The transmission includes a first portion and a second portion. The second portion including a manual actuator that is at least partially disposed outside of the housing. The intraosseous device also includes a penetrator assembly releasably connected to the first portion of the transmission. The transmission is configured to transmit a force, which is applied manually to the manual actuator, to the penetrator assembly to rotate the penetrator assembly relative to the housing and to drive the penetrator assembly through a bone into an intraosseous space. The manual actuator is a pull chord and the force is configured to be applied by an operator to a first end of the pull chord to unwind the pull chord and transmit the force to the penetrator assembly.

Abstract: Penetrator assemblies operable to provide access to an intraosseous space are disclosed. The penetrator assembly may include a flexible outer penetrator having a longitudinal bore and a distal end operable to penetrate bone and associated bone marrow. The penetrator assembly may also include a rigid inner penetrator including a distal end operable to penetrate bone and associated bone marrow. A hub having a distal end is connected to a proximal end of the flexible outer penetrator. A connector having a distal end is connected to a proximal end of the rigid inner penetrator. A proximal end of the connector can releasably engage a driver. The longitudinal bore of the flexible outer penetrator can removably receive the rigid inner penetrator to prevent or minimize the flexible outer penetrator from bending during an insertion procedure. The flexible outer penetrator can bend after removal of the rigid inner penetrator from the longitudinal bore.