US6730043B2 — Bone marrow biopsy needle

Claim 1

Independent Claim 130 words

A bone marrow biopsy device comprising: a handle; an outer cannula secured in the handle, the outer cannula defining a distal tip that provides a distal cutting edge; a stylet designed to be inserted in the outer cannula, the stylet defining a sharp distal tip; and an inner member structured to be inserted in and rotated relative to the outer cannula, the inner member having a proximal tubular portion and a distal portion defining a cutting finger comprising an open, semi-cylindrical structure having a pair of elongate edges and structured to rotatably sever a tissue sample, said inner member further comprising markings on the exterior surface of the proximal portion of said inner member, said markings indicating the length of the sample to be obtained relative to the outer cannula.

Claim 2

Dependent Claim 130 words

A bone marrow biopsy device comprising: a handle; an outer cannula secured in the handle, the outer cannula defining a distal tip that provides a distal cutting edge; a stylet designed to be inserted in the outer cannula, the stylet defining a sharp distal tip; and an inner member structured to be inserted in and rotated relative to the outer cannula, the inner member having a proximal tubular portion and a distal portion defining a cutting finger comprising an open, semi-cylindrical structure having a pair of elongate edges and structured to rotatably sever a tissue sample, said inner member further comprising markings on the exterior surface of the proximal portion of said inner member, said markings indicating the length of the sample to be obtained relative to the outer cannula.

Claim 3

Dependent Claim 21 words

The bone marrow biopsy device of claim 1 further comprising an ejector pin designed to be inserted into the inner member.

Claim 4

Dependent Claim 19 words

The bone marrow biopsy device of claim 1 further comprising a protective sheath designed to surround the inner member.

Claim 5

Dependent Claim 29 words

The bone marrow biopsy device of claim 1 wherein the sharp distal tip of the stylet is designed to extend near to the distal tip of the outer cannula.

Claim 6

Dependent Claim 29 words

The bone marrow biopsy device of claim 1 wherein the distal tip of the inner member cutting finger is positioned proximal to the distal tip of the outer cannula.

Claim 7

Dependent Claim 25 words

The bone marrow biopsy device of claim 1 wherein the cutting finger of the inner member has a length of up to about 4.0 cm.

Claim 8

Dependent Claim 130 words

A member for use with a bone marrow biopsy device and structured for insertion through and rotation within relative to an outer cannula, said member comprising: a tubular proximal end formed with a hub that secures the member; and a distal end defining a cutting finger comprising an open, semi-cylindrical configuration having a pair of substantially parallel elongate edges and beveled distal tip; wherein the cutting finger is structured such that the cutting finger is wide enough to maintain the structural integrity of the cutting finger while being sufficiently narrow to avoid or minimize subjecting a tissue sample to compression forces; and wherein the width of the cutting finger is from about 60% to about 75% of the cross-sectional circumference of the member relative to a complete perimeter circumference thereof.

Claim 9

Dependent Claim 130 words

A member for use with a bone marrow biopsy device and structured for insertion through and rotation within relative to an outer cannula, said member comprising: a tubular proximal end formed with a hub that secures the member; and a distal end defining a cutting finger comprising an open, semi-cylindrical configuration having a pair of substantially parallel elongate edges and beveled distal tip; wherein the cutting finger is structured such that the cutting finger is wide enough to maintain the structural integrity of the cutting finger while being sufficiently narrow to avoid or minimize subjecting a tissue sample to compression forces; and wherein the width of the cutting finger is from about 60% to about 75% of the cross-sectional circumference of the member relative to a complete perimeter circumference thereof.

Claim 10

Dependent Claim 13 words

The member of claim 7 wherein the hub includes a plurality of ribs.

Claim 11

Dependent Claim 17 words

The member of claim 7 wherein the member includes a proximal portion having markings on the surface.

Claim 12

Dependent Claim 40 words

The member of claim 7 wherein the inner member has a diameter of about 0.081 inches and the cutting finger has a width of about 63% of the circumference of the inner member relative to a complete perimeter circumference thereof.

Claim 13

Dependent Claim 40 words

The member of claim 7 wherein the inner member has a diameter of about 0.119 inches and the cutting finger has a width of about 74% of the circumference of the inner member relative to a complete perimeter circumference thereof.

Claim 14

Dependent Claim 18 words

The member of claim 7 wherein the cutting finger has a length of up to about 4.0 cm.

Claim 15

Dependent Claim 156 words

A kit for use in performing a bone marrow biopsy comprising: a handle having an outer cannula secured therein, the outer cannula defining a distal tip that provides a distal cutting edge; a stylet structured to be inserted in the outer cannula, the stylet defining a sharp distal tip; an inner member designed to be inserted in and rotated relative to the outer cannula, the inner member defining a cutting finger comprising an open, semi-cylindrical configuration having a pair of substantially parallel elongate edges and beveled distal tip; wherein the cutting finger is structured such that the cutting finger is wide enough to maintain the structural integrity of the cutting finger while being sufficiently narrow to avoid or minimize subjecting a tissue sample to compression forces; and wherein the width of the cutting finger is from about 60% to about 75% of the cross-sectional circumference of the inner member relative to a complete perimeter circumference thereof.

Claim 16

Dependent Claim 156 words

A kit for use in performing a bone marrow biopsy comprising: a handle having an outer cannula secured therein, the outer cannula defining a distal tip that provides a distal cutting edge; a stylet structured to be inserted in the outer cannula, the stylet defining a sharp distal tip; an inner member designed to be inserted in and rotated relative to the outer cannula, the inner member defining a cutting finger comprising an open, semi-cylindrical configuration having a pair of substantially parallel elongate edges and beveled distal tip; wherein the cutting finger is structured such that the cutting finger is wide enough to maintain the structural integrity of the cutting finger while being sufficiently narrow to avoid or minimize subjecting a tissue sample to compression forces; and wherein the width of the cutting finger is from about 60% to about 75% of the cross-sectional circumference of the inner member relative to a complete perimeter circumference thereof.

Claim 17

Dependent Claim 26 words

The kit for use in performing a bone marrow biopsy of claim 13 further comprising an ejector pin structured to be inserted into the inner member.

Claim 18

Dependent Claim 23 words

The kit for use in performing a bone marrow biopsy of claim further comprising a protective sheath structured to surround the inner member.

Claim 19

Dependent Claim 30 words

The kit for use in performing a bone marrow biopsy of claim 13 wherein the cutting finger of the inner member has a length of up to about 4.0 cm.

Claim 20

Independent Claim 96 words

A method for sampling bone marrow tissue comprising: inserting a stylet into an outer cannula; penetrating the bone cortex with the stylet and outer cannula; removing the stylet; further inserting the outer cannula into the medular cavity, thereby trapping bone marrow tissue within the outer cannula; estimating the length of tissue sample by inserting an ejector pin into the outer cannula; extending an inner member into the outer cannula, the inner member defining a cutting finger; rotating the inner member to shear off the specimen with the cutting finger; and removing the specimen from the patient.

Claim 21

Independent Claim 96 words

A method for sampling bone marrow tissue comprising: inserting a stylet into an outer cannula; penetrating the bone cortex with the stylet and outer cannula; removing the stylet; further inserting the outer cannula into the medular cavity, thereby trapping bone marrow tissue within the outer cannula; estimating the length of tissue sample by inserting an ejector pin into the outer cannula; extending an inner member into the outer cannula, the inner member defining a cutting finger; rotating the inner member to shear off the specimen with the cutting finger; and removing the specimen from the patient.

Claim 22

Dependent Claim 155 words

A bone marrow biopsy device comprising: a handle; an outer cannula secured in the handle, the outer cannula defining a distal tip that provides a distal cutting edge; a stylet structured to be inserted in the outer cannula, the stylet defining a sharp distal tip; and an inner member structured to be inserted in and rotated relative to the outer cannula, the inner member defining a cutting finger comprising an open, semi-cylindrical configuration having a pair of substantially parallel elongate edges and beveled distal tip; wherein said cutting finger has a width structured such that the cutting finger is wide enough to maintain the structural integrity of the cutting finger while being sufficiently narrow to avoid or minimize subjecting a tissue sample to compression forces; and wherein the width of the cutting finger is from about 60% to about 75% of the cross-sectional circumference of the inner member relative to a complete perimeter circumference thereof.

Claim 23

Dependent Claim 155 words

A bone marrow biopsy device comprising: a handle; an outer cannula secured in the handle, the outer cannula defining a distal tip that provides a distal cutting edge; a stylet structured to be inserted in the outer cannula, the stylet defining a sharp distal tip; and an inner member structured to be inserted in and rotated relative to the outer cannula, the inner member defining a cutting finger comprising an open, semi-cylindrical configuration having a pair of substantially parallel elongate edges and beveled distal tip; wherein said cutting finger has a width structured such that the cutting finger is wide enough to maintain the structural integrity of the cutting finger while being sufficiently narrow to avoid or minimize subjecting a tissue sample to compression forces; and wherein the width of the cutting finger is from about 60% to about 75% of the cross-sectional circumference of the inner member relative to a complete perimeter circumference thereof.

Claim 24

Dependent Claim 41 words

The bone biopsy of claim 18 wherein the inner member has a diameter of about 0.081 inches and the cutting finger has a width of about 63% of the circumference of the inner member relative to a complete perimeter circumference thereof.

Claim 25

Dependent Claim 42 words

The bone biopsy device of claim 18 wherein the inner member has a diameter of about 0.119 inches and the cutting finger has a width of about 74% of the circumference of the inner member relative to a complete perimeter circumference thereof.

Claim 26

Dependent Claim 171 words

A bone marrow biopsy device comprising: a handle; an outer cannula secured in the handle, the outer cannula defining a distal tip that provides a distal cutting edge; a stylet structured to be inserted in the outer cannula, the stylet defining a sharp distal tip; and an inner member structured to be inserted in and rotated relative to the outer cannula, the inner member defining a cutting finger comprising an open, semi-cylindrical configuration having a pair of substantially parallel elongate edges; wherein said cubing finger has a width structured such that the cutting finger is wide enough to maintain the structural integrity of the cutting finger while being sufficiently narrow to avoid or minimize subjecting a tissue sample to compression forces; and wherein the cutting finger defines a distal tip that is beveled and the distal tip of the outer cannula is tapered such that the taper of the distal tip of the outer cannula directs the cutting finger inwardly when extended near to the distal end of the outer cannula.

Claim 27

Dependent Claim 171 words

A bone marrow biopsy device comprising: a handle; an outer cannula secured in the handle, the outer cannula defining a distal tip that provides a distal cutting edge; a stylet structured to be inserted in the outer cannula, the stylet defining a sharp distal tip; and an inner member structured to be inserted in and rotated relative to the outer cannula, the inner member defining a cutting finger comprising an open, semi-cylindrical configuration having a pair of substantially parallel elongate edges; wherein said cubing finger has a width structured such that the cutting finger is wide enough to maintain the structural integrity of the cutting finger while being sufficiently narrow to avoid or minimize subjecting a tissue sample to compression forces; and wherein the cutting finger defines a distal tip that is beveled and the distal tip of the outer cannula is tapered such that the taper of the distal tip of the outer cannula directs the cutting finger inwardly when extended near to the distal end of the outer cannula.

Claim 28

Independent Claim 107 words

A method for sampling bone marrow tissue comprising: inserting a stylet into an outer cannula; penetrating the bone cortex with the stylet and the outer cannula; removing the stylet; further inserting the outer cannula into the medular cavity, thereby trapping bone marrow tissue within the outer cannula; estimating the length of tissue sample by viewing markings on the surface of the proximal portion of an inner member relative to the outer cannula; extending the inner member into the outer cannula, the inner member defining a cutting finger; rotating the inner member to shear off the specimen with the cubing finger; and removing the specimen from the patient.

Claim 29

Independent Claim 107 words

A method for sampling bone marrow tissue comprising: inserting a stylet into an outer cannula; penetrating the bone cortex with the stylet and the outer cannula; removing the stylet; further inserting the outer cannula into the medular cavity, thereby trapping bone marrow tissue within the outer cannula; estimating the length of tissue sample by viewing markings on the surface of the proximal portion of an inner member relative to the outer cannula; extending the inner member into the outer cannula, the inner member defining a cutting finger; rotating the inner member to shear off the specimen with the cubing finger; and removing the specimen from the patient.

Claim 30

Dependent Claim 48 words

The method for sampling bone marrow tissue of claim 22 wherein the step of penetrating the bone cortex with the stylet and the outer cannula is achieved by penetrating the bone cortex with a sharp distal end of the stylet and a beveled distal end of the cannula.

Claim 31

Dependent Claim 32 words

The method for sampling bone marrow tissue of claim 22 further including the step of extending the distal end of the cutting finger near to the distal end of the outer cannula.

Claim 32

Dependent Claim 21 words

The method for sampling bone marrow of claim 22 wherein said rotation of the inner member is about a 360° rotation.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2007-05-04	2007-11-03	2008-05-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2011-05-04	2011-11-03	2012-05-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2015-05-04	2015-11-03	2016-05-04	$7700.00	Window Closed / Lapsed

Bone marrow biopsy needle

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