System, method and devices for tissue-based diagnosis

Patent metadata

Field	Value
Publication number	US-9328324-B2
Application number	US-201514591792-A
Country	US
Kind code	B2
Filing date	Jan 7, 2015
Priority date	Feb 13, 2009
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

Described are devices, methods and systems for applying energy and/or a liquefaction promoting medium to a tissue of interest to generate a liquefied tissue sample. The liquefied tissue sample may be removed from the tissue of interest. Also described are compositions of the liquefaction promoting medium that may facilitate liquefaction, preserve liquefied tissue constituents, and/or enable delivery of molecules into tissues. The sample may include tissue constituents to provide for rapid tissue sampling, tissue decontamination as well as detection of analytes. One or more drugs may be delivered through or into the tissue of interest. Determination of tissue composition in the liquefied tissue sample can be used, e.g., for diagnosis or prognosis of diseases, evaluating bioavailability of therapeutic agents in different tissues following administration, forensic detection of drugs-of-abuse, evaluating changes in the tissue microenvironment following exposure to a harmful agent, and the like.

First claim

The invention claimed is:

1. A device for at least partly liquefying a tissue, comprising:
a reservoir;
an abrasive material operatively coupled to the reservoir;
a liquefaction promoting medium,
the liquefaction promoting medium comprising a non-ionic surfactant and a zwitterionic surfactant, the non-ionic surfactant comprising one or more of: polyethylene glycol dodecyl ether, polyoxyethylene 23-lauryl ether, polyoxyethylene 2-cetyl ether, polyoxyethylene 10-cetyl ether, polyoxyethylene 20-cetyl ether, polyoxyethylene 2-stearyl ether, polyoxyethylene 10-stearyl ether, polyoxyethylene 20-stearyl ether, polyoxyethylene 2-oleyl ether, polyoxyethylene 10-oleyl ether, polyoxyethylene 100-stearyl ether, or polyoxyethylene 21-stearyl ether;
the reservoir being configured:
to transmit energy through the abrasive material to the tissue; and
to be operatively connected to the tissue to apply the liquefaction promoting medium to the tissue.

2. The device of claim 1 , a total concentration of the non-ionic surfactant and the zwitterionic surfactant (w/v) in the liquefaction promoting medium being between about 0.5% to about 10%.

3. The device of claim 1 , the non-ionic surfactant and the zwitterionic surfactant being in a ratio of between about 25:75 and about 75:25.

4. The device of claim 1 , the zwitterionic surfactant comprising one or more of a sulfonate or a betaine.

5. The device of claim 1 , the reservoir being configured to transmit energy through the abrasive material to the tissue in the form of stirring, abrasion, pressure, ultrasound, or shear force.

6. The device of claim 5 , the abrasive material comprising at least one of: a fabric, abrasive crystals, diamond dust, a polymeric sponge, a natural sponge, an abrasive disc, or a brush.

7. The device of claim 5 , the abrasive material including a sponge, the sponge being configured to store the liquefaction promoting medium.

8. The device of claim 1 , further comprising a plunger operatively connected to the reservoir and configured to apply the liquefaction promoting medium from the reservoir to the tissue.

9. The device of claim 1 , at least a portion of the device being one or more of disposable or sterile.

10. The device of claim 1 , further comprising an optical energy source configured to apply optical energy to the tissue.

11. A device for at least partly liquefying a tissue to form a liquefied tissue and delivering a drug to the liquefied tissue, comprising:
a reservoir;
an abrasive material operatively coupled to the reservoir;
a liquefaction promoting medium, the liquefaction promoting medium comprising a non-ionic surfactant and a zwitterionic surfactant; and
a drug,
the non-ionic surfactant comprising one or more of: polyethylene glycol dodecyl ether, polyoxyethylene 23-lauryl ether, polyoxyethylene 2-cetyl ether, polyoxyethylene 10-cetyl ether, polyoxyethylene 20-cetyl ether, polyoxyethylene 2-stearyl ether, polyoxyethylene 10-stearyl ether, polyoxyethylene 20-stearyl ether, polyoxyethylene 2-oleyl ether, polyoxyethylene 10-oleyl ether, polyoxyethylene 100-stearyl ether, or polyoxyethylene 21-stearyl ether, and
the reservoir being configured:
to transmit energy through the abrasive material to the tissue; and
to be operatively connected to the tissue to apply to the tissue at least one of: the liquefaction promoting medium and the drug.

12. The device of claim 11 , a total concentration of the non-ionic surfactant and the zwitterionic surfactant (w/v) in the liquefaction promoting medium being between about 0.5% to about 10%.

13. The device of claim 11 , the non-ionic surfactant and the zwitterionic surfactant being in a ratio of between about 25:75 and about 75:25.

14. The device of claim 11 , the zwitterionic surfactant comprising one or more of a sulfonate or a betaine.

15. The device of claim 11 , the reservoir being configured to transmit energy through the abrasive material to the tissue in the form of stirring, abrasion, pressure, ultrasound, or shear force.

16. The device of claim 11 , the abrasive material comprising at least one of: a fabric, abrasive crystals, diamond dust, a polymeric sponge, a natural sponge, an abrasive disc, or a brush.

17. The device of claim 11 , the abrasive material including a sponge, the sponge being configured to store the liquefaction promoting medium.

18. The device of claim 11 , further comprising a plunger operatively connected to the reservoir and configured to apply the liquefaction promoting medium from the reservoir to the tissue.

19. The device of claim 11 , at least a portion of the device being one or more of: disposable or sterile.

20. The device of claim 11 , further comprising an optical energy source configured to apply optical energy to the tissue.

Assignees

• Univ California

Inventors

• Mitragotri Samir
• Paliwal Sumit
• Ogura Makoto

Classifications

• A61K38/28

  Insulins · CPC title

• A61B10/0045

  Devices for taking samples of body liquids · CPC title

• G01N1/4044

  by chemical techniques; Digestion; Chemical decomposition · CPC title

• A61M2037/0046

  Solid microneedles · CPC title

• A61B10/0283

  with vacuum aspiration, e.g. caused by retractable plunger or by connected syringe (A61B10/025, A61B10/0266 take precedence) · CPC title