Apparatus and method for harvesting bone marrow

• US 20070055282A1
• Filed: 11/09/2006
• Published: 03/08/2007
• Est. Priority Date: 03/31/2003
• Status: Abandoned Application

• Current Assignee: Cleveland Clinic Foundation
• Original Assignee: Cleveland Clinic Foundation
• Inventors: Muschler, George
• Application Number:
  US11/595,472
• Publication Number:
  US 20070055282A1
• Time in Patent Office: Days
• US Class Current: 606/92
• CPC Class Codes: A61B 10/0045 Devices for taking samples of body liquids devices for taking blood samples A61B5/15
• CPC Class Codes: A61B 10/0233 Pointed or sharp biopsy instruments
• CPC Class Codes: A61B 10/025 for taking bone, bone marrow or cartilage samples
• CPC Class Codes: A61B 10/0283 with vacuum aspiration, e.g. caused by retractable plunger or by connected syringe A61B10/025, A61B10/0266 take precedence
• CPC Class Codes: A61B 17/1635 for grafts, harvesting or transplants
• CPC Class Codes: A61B 17/1664 for the hip
• CPC Class Codes: A61B 17/32002 with continuously rotating, oscillating or reciprocating cutting instruments
• CPC Class Codes: A61B 2010/0258 Marrow samples
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61B 2217/007 with irrigation system

Abstract

A minimally invasive apparatus and method for harvesting bone marrow cells, blood, and bone fragments includes a rigid cannula having a proximal end and a distal end with an opening. The distal end includes a cutting tip that is movable axially and radially to cut and disrupt bone tissue while preserving necessary viability among harvested marrow cells. The cannula further includes an inner surface defining an internal passage that extends from the opening toward the proximal end. Suction is applied to the passage to draw disrupted bone marrow cells, blood, and bone fragments into the internal passage for collection. The apparatus may include a rotatable shaft disposed co-axially within the internal passage. The shaft has a distal end with a cutting bit for further cutting and disrupting of bone tissue, and a lumen for supplying bone cement to the cutting bit to promote bone growth and healing within the bone.

Claims

1. A minimally invasive apparatus for harvesting bone marrow cells, blood, and bone fragments from bone, said apparatus comprising:

a rigid cannula having a proximal end and a distal end with an opening, said distal end including a cutting tip that is movable axially and radially to cut and disrupt bone tissue while preserving necessary viability among harvested marrow cells, said cannula further including an inner surface defining an internal passage that extends from said opening toward said proximal end;

a shaft disposed within said internal passage, said shaft having a proximal end and a distal end having a cutting bit with an opening, said shaft further having a lumen extending from said proximal end of the shaft to said opening in said cutting bit;

means for applying suction to said internal passage in said cannula for drawing bone marrow cells, blood, and bone fragments disrupted from the bone tissue by said cutting tip into said internal passage for collection; and

means for supplying bone cement to said lumen in said shaft to promote bone growth and healing within said bone.

2. A minimally invasive method for harvesting bone marrow cells, blood, and bone fragments, said method comprising the steps of:

(a) providing an apparatus having a rotatable shaft with a distal end for disrupting bone tissue, the rotatable shaft further including a lumen for delivering bone cement to the bone, the apparatus further including means for rotating the shaft and a cannula encircling the shaft to define an annular passage;

(b) inserting the distal end of the shaft through a puncture site, through the cortex of a bone, and into the intramedullary canal of the bone;

(c) rotating the shaft to cause the cutting bit to rotate and disrupt the cancellous bone in the intramedullary canal;

(d) applying suction to the annular passage which draws bone marrow cells, blood, and bone fragments disrupted from the cancellous bone into the annular passage for collection;

(e) manually moving the distal end of the shaft to different locations in the cancellous bone and disrupting additional bone tissue with the apparatus remaining in the same puncture site; and

(f) repeating steps (c) and (d) to further collect bone marrow cells, blood, and bone fragments.

(g) supplying bone cement to the lumen of the rotatable shaft to promote bone growth and healing in the bone.