Aspiration needle and method

• US 5,902,279 A
• Filed: 04/13/1995
• Issued: 05/11/1999
• Est. Priority Date: 04/20/1993
• Status: Expired due to Fees

• Current Assignee: Advanced Cytometric Incorporated
• Original Assignee: Advanced Cytometric Incorporated
• Inventors: Imran, Mir A., Powles, Trevor J., Syed, Baber R., Gandhi, Deepak
• Primary Examiner(s): Stright, Jr., Ronald
• Assistant Examiner(s): NGUYEN, ANH TUAN TUONG
• Application Number:
  US08/421,063
• Time in Patent Office: 1,489 Days
• Field of Search: 604/239, 604/240, 604/272-274, 604/287, 604/264, 604/51, 604/243, 604/247, 604/140, 604/141, 604/147, 604/22, 604/168, 128/763, 128/765, 128/751, 128/770, 600/577, 600/578
• US Class Current: 604/239
• 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 2017/00973 pedal-operated
• CPC Class Codes: A61B 2017/32007 with suction or vacuum means
• CPC Class Codes: A61B 2090/378 using ultrasound
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61B 2217/007 with irrigation system

Abstract

An aspiration needle for use in collecting larger cell samples with a source of vacuum for fine needle aspiration cytology without increasing the size of the needle having a rigid elongate tubular member having distal and proximal extremities. The tubular member has a bore extending therethrough from the distal extremity to the proximal extremity and has an opening at the distal extremity in communication with the bore. A body is secured to the proximal extremity of the tubular member and forms a chamber therein in communication with and in close proximity to the opening into the bore of the tubular member. The chamber is formed by a sloping uninterrupted wall leading distally to the opening to the bore of the tubular member. The body includes a hub proximal of the chamber for receiving the source of vacuum and for establishing communication between the source of vacuum and the chamber. The body has an enlarged portion adjacent the proximal extremity of the tubular member permitting viewing of the chamber in the vicinity of the proximal extremity of the tubular member to facilitate observation of aspirate as it is collected in the chamber.

Claims

1. An aspiration needle for use in collecting larger cell samples with a source of vacuum for fine needle aspiration cytology without increasing the size of the needle comprising a rigid elongate tubular member having distal and proximal extremities, the tubular member having a bore extending therethrough from the distal extremity to the proximal extremity of the rigid elongate tubular member and having an opening at the distal extremity in communication with the bore and a body secured to the proximal extremity of the tubular member and forming a collection chamber therein in communication with and in close proximity to the opening to the bore of the tubular member, said collection chamber being formed by a sloping uninterrupted wall leading distally to the opening to the bore of the tubular member, said body including a hub proximal of the collection chamber for receiving said source of vacuum and for establishing communication between the source of vacuum and the collection chamber, said body having an enlarged portion adjacent the proximal extremity of the tubular member permitting magnified viewing of the collection chamber in the vicinity of the proximal extremity of the tubular member to facilitate observation of aspirate as it is collected in the collection chamber.

2. A needle as in claim 1 wherein said enlarged portion encircles said collection chamber.

3. A needle as in claim 1 wherein said collection chamber is conical in shape and is formed by an inclined uninterrupted conical wall extending in a substantially straight line.

4. A needle as in claim 3 wherein the body has a central axis and wherein said conical wall extends at an angle of approximately 3°

to 6°

with respect to the central axis of the body.

5. An aspiration needle for use in collecting larger cell samples with a source of vacuum for fine needle aspiration cytology without increasing the size of the needle comprising a rigid elongate tubular member having distal and proximal extremities, the tubular member having a bore extending therethrough from the distal extremity to the proximal extremity of the rigid elongate tubular member and having an opening at the distal extremity in communication with the bore and a body secured to the proximal extremity of the tubular member and forming a collection chamber therein in communication with and in close proximity to the opening to the bore of the tubular member, said collection chamber being formed by a sloping uninterrupted wall leading distally to the opening to the bore of the tubular member, said body including a hub proximal of the collection chamber for receiving said source of vacuum and for establishing communication between the source of vacuum and the collection chamber, said body having an enlarged portion adjacent the proximal extremity of the tubular member permitting magnified viewing of the collection chamber in the vicinity of the proximal extremity of the tubular member to facilitate observation of aspirate as it is collected in the collection chamber and a ring formed of a ferro-magnetic material carried by the proximal extremity of the body.

6. A needle as in claim 5 further including a vibrator disposed on the needle and overlying at least a portion of the metal ring.

7. An aspiration needle for use in collecting larger cell samples with a source of vacuum for fine needle aspiration cytology without increasing the size of the needle comprising a rigid elongate tubular member having distal and proximal extremities, the tubular member having a first bore extending therethrough from the distal extremity to the proximal extremity of the rigid elongate tubular member and having an opening at the distal extremity in communication with the first bore and a body secured to the proximal extremity of the tubular member and forming a collection chamber therein in communication with and in close proximity to the opening to the first bore of the tubular member, said collection chamber being formed by a sloping uninterrupted wall leading distally to the opening to the bore of the tubular member, said body including a hub proximal of the collection chamber for receiving said source of vacuum and for establishing communication between the source of vacuum and the collection chamber, said body having an enlarged portion adjacent the proximal extremity of the tubular member permitting magnified viewing of the collection chamber in the vicinity of the proximal extremity of the tubular member to facilitate observation of aspirate as it is collected in the collection chamber, said rigid elongate tubular member having a second bore therein extending therethrough from the distal extremity of the rigid elongate tubular member, said body having a recess therein adapted to be connected to the source of fluid, said elongate tubular member having a hole therein proximal of the opening and in communication with the second bore for supplying fluid from the source fluid to the distal extremity of the rigid elongate tubular member to aid in the collection of the cell sample through the first bore.