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Bone marrow biopsy instrument

  • US 5,357,974 A
  • Filed: 03/04/1993
  • Issued: 10/25/1994
  • Est. Priority Date: 03/04/1993
  • Status: Expired due to Fees
First Claim
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1. A bone marrow biopsy instrument for surgical extracting bone, marrow, fluids and tissue with a single bone puncture, said instrument comprising:

  • a rigid, elongated, hollow aspirate needle comprising open distal end for aspirating bone marrow fluid;

    a rigid, elongated, hollow biopsy needle telescoped within said aspirate needle, said biopsy needle comprising a distal end normally projecting from said aspirate needle distal end for penetrating a bone and obtaining a solid bone marrow sample, said distal end comprising a symmetrical bulbous, sharpened end for captivating a specimen of bone marrow tissue and a set of at least two diametrically opposed longitudinal relief slots defined in said distal end for enabling said bulbous end to compress shut when said biopsy needle is withdrawn from said bone marrow tissue cavity and said bulbous end enters said aspirate needle; and

    ,a rigid, elongated, solid stylet removably telescoped within said biopsy needle, said stylet comprising a sharp distal end extending outwardly from said biopsy needle distal end for initially penetrating body tissue and occluding an interior of said biopsy needle.

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