Passive safety intraosseous device

Abstract

A portable and passive safety intraosseous device to allow for direct introduction of medications, etc., within the intermedullary space of a subject patient's bone or, if needed, the removal of certain substances from such a subject patient's bone. Such a device permits direct drilling and placement of a cannula within the subject bone with access external to the subject patient's skin, permitting, as well, connection of a tube for such introduction/removal purposes. The ability to provide a passive safety unit allows for facilitated utilization in, for instance, emergency situations with the entire device provided for utilization thereof. The device includes a drilling component with a permanently attached stylet and a removable cannula, a power supply for a single drilling operation, a mechanism to draw the stylet back into the drill component after use and disengagement from the cannula, and an automatic closure that activates with the separation of the cannula.

What is claimed is: 
     
         1 . A drill/stylet combination, wherein said drill includes a stylet retraction port therein, a retracting mechanism attached to said stylet and disposed within said drill, a gearbox, a motor, a power supply, and a cannula connected in detachable relation to said stylet, wherein said stylet is attached to said gearbox or rotating component attached therto, wherein said retracting mechanism operates subsequent to utilization of said drill to introduce said stylet and cannula within the intermedullary space of a subject bone, said retracting mechanism moving said stylet from an external location to said stylet retraction port within said drill subsequent to a drilling operation, and wherein said cannula is attached to said drill with a Luer lock component with a lip portion present external to said drill and an automatic closure internally within said drill that activates upon disengagement of said cannula from said drill. 
     
     
         2 . The device  claim 1  further including a sensor on said stylet, wherein said sensor measures pressure subsequent to bone entry such that once passed through to said intermedullary space the pressure difference deactivates the drill and activates the retraction mechanism and detaching from said cannula. 
     
     
         3 . A method of introducing substances into and/or removing substances from a target intramedullary space of a bone utilizing the device of  claim 1 , said method comprising the steps of:
 a) providing said device;   b) determining the properly located bone portion for introduction thereof said stylet/cannula of said device;   c) activating said device to drill said stylet/cannula therein until reaching the desired depth within the intermedullary space of said bone;   d) deactivating said drill once said depth is reached, thereby activating the retracting mechanism thereof thereby decoupling said stylet from said cannula and retracting said stylet into said drill within a retraction port therein;   e) placing said drill/retracted stylet implement within a disposable container;   f) utilizing said retained cannula for introduction or removal of said substances.   
     
     
         4 . A method of introducing substances into and/or removing substances from a target intramedullary space of a bone utilizing the device of  claim 2 , said method comprising the steps of:
 a) providing said device;   b) determining the properly located bone portion for introduction thereof said stylet/cannula of said device;   c) activating said device to drill said stylet/cannula therein until reaching the desired depth within the intermedullary space of said bone as indicated by said sensor;   d) deactivating said drill once said depth is reached through a signal from said sensor, thereby activating the retracting mechanism thereof thereby decoupling said stylet from said cannula and retracting said stylet into said drill within a retraction port therein;   e) placing said drill/retracted stylet implement within a disposable container;   f) utilizing said retained cannula for introduction or removal of said substances.