Assessment of organs for transplant, xenotransplant, and predicting time of death

• US 6,587,715 B2
• Filed: 05/03/2001
• Issued: 07/01/2003
• Est. Priority Date: 05/03/2001
• Status: Active Grant

• Current Assignee: The Nutrition Solutions Corporation
• Original Assignee: The Nutrition Solutions Corporation
• Inventors: Singer, Michaeal G.
• Primary Examiner(s): Hoang, Tu Ba
• Application Number:
  US09/848,242
• Publication Number:
  US 20020165464A1
• Time in Patent Office: 789 Days
• Field of Search: 600/300, 600/384, 600/506, 600/546, 600/547, 600/508, 600/536, 600/587, 324/76.41, 324/89, 324/611, 324/668, 324/670, 324/692, 330/51, 330/69, 128/898
• US Class Current: 600/547
• CPC Class Codes: A61B 5/053 Measuring electrical impedance or conductance of a portion of the body
• CPC Class Codes: A61B 5/413 Monitoring transplanted tissue or organ, e.g. for possible rejection reactions after a transplant
• CPC Class Codes: A61B 5/4869 Determining body composition
• CPC Class Codes: G01N 33/48707 by electrical means G01N33/49, G01N33/493 take precedence

Abstract

A method for determining illness, progression to death, and timing of death of a biological entity, in which whole body measurements of electrical impedance and composition of the biological entity are taken and recorded at predetermined intervals of time for providing initially measured values and serially measured values, and then the initially measured values are compared to normal values and to the serially measured values to determine hallmarks or characteristics of illness, progression to death and timing to death of the biological entity.

Claims

1. A method for determining illness of a biological entity, progression to death of said biological entity, or timing of death of said biological entity, comprising the steps of:

providing normal values of resistance, reactance, phase angle, extracellular water volume, and intracellular water volume of the whole body of the biological entity;

measuring initial values of resistance, phase angle, extracellular water volume, and intracellular water volume of the whole body of the biological entity;

taking whole body measurements of phase angle, extracellular water volume, and intracellular water volume at predetermined intervals of time;

recording said whole body measurements;

comparing initial values of said whole body measurements to said normal values of said whole body measurements and to serially measured values of said whole body measurements; and

determining from said comparison steps hallmarks of said illness of said biological entity, said progression to said death of said biological entity, or said timing of death of said biological entity.

2. A method according to claim 1, wherein:

said hallmarks include an uncorrectable loss of cell mass and membrane capacity as evidenced by a reduction in said reactance and phase angle.

3. A method according to claim 1, wherein:

said hallmarks include an uncorrectable and increasing disparity of said extracellular water volume being greater than said intracellular water volume.

4. A method according to claim 2, wherein:

said hallmarks include an uncorrectable and increasing disparity of said extracellular water volume being greater than said intracellular water volume.

5. A method according to claim 2, wherein:

when said uncorrectable loss of cell mass and membrane capacity remains uncorrectable, said uncorrectable loss of cell mass and membrane capacity comprise hallmarks of said progression of said death of said biological entity.

6. A method according to claim 4, wherein:

when said uncorrectable loss of cell mass and membrane capacity remains uncorrectable, said uncorrectable loss of cell mass and membrane capacity comprise hallmarks of said progression to said death of said biological entity.

7. A method according to claim 3, wherein:

when said uncorrectable and increasing disparity of said extracellular water volume being greater than said intracellular water volume remains uncorrectable, said uncorrectable and increasing disparity of said extracellular water volume comprise hallmarks of said progress to said death of said biological entity.

8. A method according to claim 4, wherein:

when said uncorrectable and increasing disparity of said extracellular water volume being greater than said intracellular water volume remains uncorrectable, said uncorrectable and increasing disparity of said extracellular water volume comprise hallmarks of said progress to said death of said biological entity.

9. A method according to claim 6, wherein:

when said uncorrectable and increasing disparity of said extracellular water volume being greater than said intracellular water volume remains uncorrectable, said uncorrectable and increasing disparity of said extracellular water volume comprise hallmarks of said progress to said death of said biological entity.

10. A method according to claim 1, wherein:

values of said phase angle less than four degrees denote serious illness of said biological entity, and

values of said phase angle less than two degrees denote imminent death of said biological entity.

11. A method according to claim 2, wherein:

values of said phase angle less than four degrees denote serious illness of said biological entity; and

values of said phase angle less than two degrees denote imminent death of said biological entity.

12. A method according to claim 3, wherein:

values of said phase angle less than four degrees denote serious illness of said biological entity; and

values of said phase angle less than two degrees denote imminent death of said biological entity.

13. A method according to claim 4, wherein:

values of said phase angle less than four degrees denote serious illness of said biological entity; and

values of said phase angle less than two degrees denote imminent death of said biological entity.

14. A method according to claim 5, wherein:

values of said phase angle less than four degrees denote serious illness of said biological entity; and

values of said phase angle less than two degrees denote imminent death of said biological entity.

15. A method according to claim 1, wherein:

said whole body measurements of said resistance, said reactance, said phase angle, said extracellular water volume, and said intracellular water volume are taken every other day.

16. A method according to claim 2, wherein:

said whole body measurements of said resistance, said reactance, said phase angle, said extracellular water volume, and said intracellular water volume are taken every other day.

17. A method according to claim 3, wherein:

said whole body measurements of said resistance, said reactance, said phase angle, said extracellular water volume, and said intracellular water volume are taken every other day.