Methods and apparatus to reduce biological carryover using induction heating

Patent metadata

Field	Value
Publication number	US-9974872-B2
Application number	US-201715593955-A
Country	US
Kind code	B2
Filing date	May 12, 2017
Priority date	Dec 28, 2011
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

Methods and apparatus to reduce biological carryover using induction heating are disclosed herein. An example method includes washing an aspiration and dispense device. The example method includes generating an alternating electromagnetic field and introducing the aspiration and dispense device into the alternating electromagnetic field. In the example method, the washing is to occur prior to introducing the aspiration and dispense device into the alternating electromagnetic field. The example method includes inductively heating the aspiration and dispense device with the alternating electromagnetic field.

First claim

What is claimed is:

1. A method comprising:
washing an aspiration and dispense device;
generating an alternating electromagnetic field;
introducing the aspiration and dispense device into the alternating electromagnetic field, the washing to occur prior to introducing the aspiration and dispense device into the alternating electromagnetic field; and
inductively heating the aspiration and dispense device with the alternating electromagnetic field.

2. The method of claim 1 , wherein the generating the alternating electromagnetic field includes flowing a current through an electrically conducting media, a frequency of the current to be adjusted based on a diameter of the aspiration and dispense device.

3. The method of claim 2 , wherein the electrically conducting media is a coil.

4. The method of claim 2 , wherein a tip of the aspiration and dispense device has a first diameter and a body of the aspiration and dispense device has a second diameter and further including adjusting the frequency to generate a first frequency based on the first diameter and a second frequency based on the second diameter.

5. The method of claim 1 , wherein generating the alternating electromagnetic field includes flowing a current through an electrically conducting media, a frequency of the current to be adjusted based on a thickness of a skin of the aspiration and dispense device.

6. The method of claim 1 , wherein the introducing the aspiration and dispense device into the alternating electromagnetic field includes introducing only a portion of the aspiration and dispense device into the alternating electromagnetic field, the portion to be inductively heated with the alternating electromagnetic field.

7. The method of claim 6 , wherein the aspiration and dispense device includes a first portion and a second portion, the first portion smaller than the second portion, and further including adjusting a frequency of the electromagnetic field to generate a first frequency based on the first portion and a second frequency based on the second portion.

8. The method of claim 1 , wherein the generating the alternating electromagnetic field includes using a standard electrical wall outlet.

9. The method of claim 1 , wherein the inductively heating the aspiration and dispense device includes inductively heating one or more of an interior surface of the aspiration and dispense device and an exterior surface of the aspiration and dispense device.

10. The method of claim 1 , wherein generating the alternating electromagnetic field includes flowing a current through an electrically conducting media, and further including:
detecting a change in the current based on a load change with respect to the electrically conducting media, the load change to be associated with the introduction of the aspiration and dispense device into the alternating electromagnetic field; and
adjusting a frequency of the current based on the change.

11. A method comprising:
generating an alternating electromagnetic field;
introducing an aspiration and dispense device into the alternating electromagnetic field;
inductively heating the aspiration and dispense device with the alternating electromagnetic field; and
washing the aspiration and dispense device after inductively heating the aspiration and dispense device with the electromagnetic field.

12. The method of claim 11 , wherein the washing includes washing the aspiration and dispense device with a fluid to lower a temperature of the aspiration and dispense device.

13. The method of claim 11 , further including disposing at least a portion of the aspiration and dispense device into a wash cup during the inductive heating, the wash cup to be disposed proximate to an electromagnetic field generator used to generate the alternating electromagnetic field.

14. The method of claim 13 , wherein the wash cup is coupled to the electromagnetic field generator.

15. The method of claim 11 , wherein generating the alternating electromagnetic field includes flowing a current through an electrically conducting media, and further including:
detecting a change in the current based on a load change with respect to the electrically conducting media, the load change to be associated with the introduction of the aspiration and dispense device into the alternating electromagnetic field; and
adjusting a frequency of the current based on the change.

16. The method of claim 11 , wherein generating the alternating electromagnetic field includes flowing a current through an electrically conducting media, a frequency of the current to be adjusted based on a diameter of the aspiration and dispense device.

17. A method comprising:
generating an alternating electromagnetic field by flowing a current though an electrically conducting media, a frequency of the current to be based on a characteristic of an aspiration and dispense device;
introducing the aspiration and dispense into the alternating electromagnetic field;
inductively heating the aspiration and dispense device with the electromagnetic field; and
raising or lowering the aspiration and dispense device through the alternating electromagnetic field to inductively heat the aspiration and dispense device along a length of the aspiration and dispense device.

18. The method of claim 17 , wherein the characteristic includes a thickness of a skin of the aspiration and dispense device, the thickness to vary along a length of the aspiration and dispense device and further including adjusting the frequency based on the thickness as the aspiration and dispense device is raised or lowered.

19. The method of claim 17 , wherein the characteristic includes a diameter of the aspiration and dispense device and further including adjusting the frequency based on the diameter of the aspiration and dispense device.

20. A method comprising:
generating an alternating electromagnetic field using a current via an electromagnetic field generator;
detecting a change in the current based on a load change with respect to the electromagnetic field generator or a temperature change;
detecting a presence of an aspiration and dispense device in the alternating electromagnetic field based on the change; and
inductively heating the aspiration and dispense device with the electromagnetic field.

21. The method of claim 20 , further including adjusting a frequency of the current based on one or more of (a) contents of the aspiration and dispense device prior to exposure to the alternating electromagnetic field or (b) contents to be disposed in the aspiration and dispense device after exposure to the alternating electromagnetic field.

22. The method of claim 21 , further including adjusting the frequency based on an amount of proteins associated with the contents of the aspiration and dispense device prior to exposure to the alternating electromagnetic field.

23. The method of claim 20 , further including adjusting a frequency of the current based on the load change.

Assignees

• Abbott Lab

Inventors

• Weston Brad
• Mitchell Jeffrey

Classifications

• B01L3/021

  Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids · CPC title

• A61L2/04 Primary

  Heat (radiation A61L2/08) · CPC title

• B01L2200/141

  Preventing contamination, tampering · CPC title

• H05B6/08

  using compensating or balancing arrangements · CPC title

• B01L13/02

  for receptacle or instruments · CPC title