Abinash Nayak

US Patent:

6984218, Jan 10, 2006

Filed:

May 21, 2002

Appl. No.:

10/153165

Inventors:

Abinash Nayak - Vernon Hills IL, US
James Jacobson - Lindenhurst IL, US
Tom Westberg - Gurnee IL, US
William E Brach - Cary IL, US
Richard I Brown - Northbrook IL, US

Assignee:

Baxter International Inc. - Deerfield IL

International Classification:

A61M 37/00
C02F 1/00

US Classification:

604 611, 604 601, 604 61, 604 401, 210782

Abstract:

Systems and related methods pump fluid through a pump. The pump comprises a pump chamber, which is responsive to applied pressures to convey fluid. The systems and methods place an electrode in electrical conductive contact with fluid in the pump chamber which, in use, is coupled to an electrical source. The electrode generates an electrical field in the pump chamber that varies according volume of fluid in the pump chamber. The systems and methods register variations in the electrical field as fluid is conveyed through the pump chamber.

US Patent:

20020077582, Jun 20, 2002

Filed:

Oct 13, 2001

Appl. No.:

09/976831

Inventors:

Nabil Mehdi - Grayslake IL, US
Kelly Smith - Gurnee IL, US
Abinash Nayak - Gurnee IL, US

Assignee:

Baxter International Inc.

International Classification:

A61M037/00

US Classification:

604/006110

Abstract:

Systems and methods detect when a potential donor draw occlusion condition occurs. The systems and methods attempt to rectify the condition, e.g., by increasing pressure of the pressure cuff and/or decreasing the commanded draw rate, before generating a processing-halting vein occlusion alarm.

US Patent:

62610651, Jul 17, 2001

Filed:

Sep 3, 1999

Appl. No.:

9/390491

Inventors:

Abinash Nayak - Grayslake IL
James D. Jacobson - Lindenhurst IL
Tom Westberg - Gurnee IL
William E Brach - Cary IL
Richard I Brown - Northbrook IL

Assignee:

Baxter International Inc. - Deerfield IL

International Classification:

F04B 1924

US Classification:

417 53

Abstract:

Systems and related methods pump fluid through a pump. The pump comprises a pump chamber, which is responsive to applied pressures to convey fluid. The systems and methods place an electrode in the pump chamber which, in use, is coupled to a current source. The electrode generates an electrical field in the pump chamber that varies according volume of fluid in the pump chamber. The systems and methods register variations in the electrical field as fluid is conveyed through the pump chamber.

US Patent:

62547844, Jul 3, 2001

Filed:

Oct 30, 1997

Appl. No.:

8/961340

Inventors:

Abinash Nayak - Grayslake IL
Clint D. Luckinbill - Carpentersville IL
John T. Foley - Wheeling IL
Minh D. Tran - Grayslake IL
James R. Bradley - Palatine IL
Timothy J. Patno - Mundelein IL

Assignee:

Baxter International Inc. - Deerfield IL

International Classification:

B01D 1712
G01N 3348

US Classification:

210745

Abstract:

A centrifuge for continuously separating the various constituents of blood or other biological fluids includes a rotating bowl having high-G and low-G walls. An inwardly directed ramped surface on the high-G wall interacts with an interface region between the separated fluid constituents to provide an optically detectable indication of the position of the interface between the high-G and low-G walls. An optical sensor sensing each passage of the ramped surface past a point develops a changing signal indicative of the interface position. Signal processing circuitry responsive to the signal measures such signal parameters as peak amplitude, signal area and signal shape. By so monitoring these signal parameters, a better indication of actual interface position between the high-G and low-G walls can be obtained. This, in turn, results in better control over centrifuge operation and improved separation of the desired fluid components.