Inline filter

• US 6,189,704 B1
• Filed: 10/23/1997
• Issued: 02/20/2001
• Est. Priority Date: 07/12/1993
• Status: Expired due to Term

• Current Assignee: Fenwal Incorporated (Fresenius SE & Co. KGaA)
• Original Assignee: Baxter International Inc.
• Inventors: Dennehey, T. Michael, Yang, James W., West, Joseph C. Jr.
• Primary Examiner(s): KIM, SUN U
• Application Number:
  US08/955,409
• Time in Patent Office: 1,216 Days
• Field of Search: 210/435, 210/437, 210/446, 210/453, 210/499, 604/406, 604/408
• US Class Current: 210/435
• CPC Class Codes: A61B 10/025 for taking bone, bone marrow or cartilage samples
• CPC Class Codes: A61B 2010/0258 Marrow samples
• CPC Class Codes: A61M 1/79 Filters for solid matter specially adapted for dental use A61C17/065

Abstract

A bone marrow collection kit is provided comprising a collection container for receiving a bone marrow containing fluid having a body that defines an interior and an inlet opening and an outlet opening and including a prefilter that extends from the outlet opening into the interior of the collection container so that fluid must flow through the prefilter to exit the collection container through the outlet opening. A first inline filter member is coupled to the outlet opening of the collection container, the first inline filter member having a flexible plastic body that defines an interior, and an inlet opening and an outlet opening and the interior including a filter so constructed and arranged that fluid that enters the inlet opening must flow through the filter to exit the first inline filter member through the outlet opening. A container for receiving a resultant filtered bone marrow containing fluid having an interior in fluid communication with the outlet opening of the first inline filter member is also provided. Methods for processing the bone marrow and constructing the inline filter are also provided.

Claims

1. An inline filter for filtering biological suspension comprising:

a body having a first side and a second side constructed from flexible sheets of polyvinyl chloride containing plastic and defining an interior having an inlet and an outlet opening; and

a filter screen, constructed from a flurocarbon plastic, that is sealed along edges of the first and second sides so as to extend for an entire width and for an entire length of the interior.

2. The inline filter of claim 1 wherein the body and the filter screen each have a circular cross-sectional shape.

3. The inline filter of claim 1 wherein the body and the filter screen each have a square cross-sectional shape.

4. The inline filter of claim 1 wherein the first and second sides comprise separate sheets of flexible plastic.

5. The inline filter of claim 1 wherein the biological suspension is a bone marrow containing fluid.

6. The inline filter of claim 1 wherein the flexible plastic is sufficiently flexible to allow manual manipulation of the filter screen through the sheets.

7. The inline filter of claim 1 wherein the flexible plastic has a thickness of approximately 0.005 to approximately 0.030 inches.