	US 12,226,124 B2
	Constant-torque intraosseous access devices and methods thereof
Daniel Pett, Sandy, UT (US); Daniel B. Blanchard, Bountiful, UT (US); Eric W. Lindekugel, Salt Lake City, UT (US); Joe Spataro, Cottonwood Heights, UT (US); and Ralph Sonderegger, Farmington, UT (US)
Assigned to Bard Access Systems, Inc., Salt Lake City, UT (US)
Filed by Bard Access Systems, Inc., Salt Lake City, UT (US)
Filed on Sep. 11, 2023, as Appl. No. 18/244,730.
Application 18/244,730 is a division of application No. 17/035,272, filed on Sep. 28, 2020, granted, now 11,759,235.
Claims priority of provisional application 62/907,454, filed on Sep. 27, 2019.
Prior Publication US 2023/0414251 A1, Dec. 28, 2023
Int. Cl. A61B 17/34 (2006.01); A61B 17/16 (2006.01)

CPC A61B 17/3472 (2013.01) [A61B 17/1624 (2013.01); A61B 17/164 (2013.01)]

20 Claims

1. A method of using an intraosseous access device including a constant-torque spring assembly disposed in a housing, the constant-torque spring assembly including a metal ribbon reversely wound onto an output spool, a drive shaft extending from the housing, the drive shaft coupled to the constant-torque spring assembly, an intraosseous needle coupled to the drive shaft, and a cannula, the method comprising:

inserting a distal end of the intraosseous needle through a skin surface at an insertion site of a patient;

applying a contacting force to a bone beneath the insertion site via the distal end of the intraosseous needle, the contacting force initiating a winding of the metal ribbon of the constant-torque spring assembly from the output spool onto a storage spool, thereby initiating a drilling rotation of the intraosseous needle;

drilling through the bone until the intraosseous needle enters a medullary cavity of the patient;

removing the intraosseous needle from the medullary cavity of the patient;

confirming the cannula is disposed in the medullary cavity by aspirating bone marrow through a syringe;

securing the cannula to the patient; and

initiating interosseous infusion.