Device and method for aspirating bone marrow

Abstract

A device and method for aspirating bone barrow. The device includes a double syringe assembly having a distal syringe and a proximal syringe coupled to the distal syringe. A plunger includes a distal end disposed within a barrel of the distal syringe and a proximal end disposed within a barrel of the proximal syringe. A needle assembly is coupled to the double syringe assembly and includes a needle having an outer tube and an inner tube disposed within the outer tube. Upon actuation of the plunger, the distal syringe aspirates bone marrow through the outer tube of the needle and into a chamber of the distal syringe. At the same time, the proximal syringe injects fluid through the inner tube of the needle at the same rate in which the bone marrow is aspirated.

1 .- 26 . (canceled) 
     
     
         27 . A method of aspirating bone marrow comprising:
 extracting tissue from an aspiration hole in a target area;   injecting fluid through one or more of the aspiration hole or a separate injection hole in the target area one or more of simultaneous to or before extracting the tissue.   
     
     
         28 . The method of  claim 27 , wherein injecting fluid through one or more of the aspiration hole or a separate injection hole in the target area one or more of simultaneous to or before extracting the tissue comprises injecting one or more of a saline or other salt-balanced sterile solution, an antibiotic, or an anesthetic. 
     
     
         29 . The method of  claim 27 , wherein extracting bone marrow from an aspiration hole in a target area comprises extracting the tissue through one of an aspiration needle or an outer tube of a needle of a needle assembly. 
     
     
         30 . The method of  claim 27 , wherein injecting fluid through one or more of the aspiration hole or a separate injection hole in the target area one or more of simultaneous to or before extracting the tissue comprises injecting fluid through one of an injection needle separate from the aspiration needle or an inner tube of a needle of a needle assembly. 
     
     
         31 . The method of  claim 27 , wherein extracting tissue from the aspiration hole in a target area comprises extracting the tissue into one of a chamber of a distal syringe or an aspiration syringe. 
     
     
         32 . The method of  claim 31 , wherein injecting fluid through one or more of the aspiration hole or a separate injection hole in the target area one or more of simultaneous to or before extracting the tissue comprises injecting fluid disposed within one of a chamber of a proximal syringe coupled to a distal syringe or an injection syringe. 
     
     
         33 . The method of  claim 27 , wherein extracting tissue from an aspiration hole in a target area comprises extracting bone marrow from the aspiration hole in the target area. 
     
     
         34 . The method of  claim 27 , wherein injecting fluid through one or more of the aspiration hole or a separate injection hole in the target area one or more of simultaneous to or before extracting the tissue comprises injecting fluid through one or more of the aspiration hole or a separate injection hole in the target area before extracting the tissue. 
     
     
         35 . The method of  claim 34 , wherein, after extracting tissue from the aspiration hole in the target area, the method further comprises again injecting the fluid through one or more of the aspiration hole or a separate injection hole in the target area before extracting the tissue and extracting tissue from the aspiration hole in the target area in sequence for one or more additional times.