Hand washing compliance detection system

• US 7,978,083 B2
• Filed: 05/03/2010
• Issued: 07/12/2011
• Est. Priority Date: 06/08/2007
• Status: Active Grant

• Current Assignee: Biovigil Hygiene Technologies LLC (BioVigil Healthcare Systems, Inc.)
• Original Assignee: University of Florida Research Foundation, Incorporated (State University System of Florida)
• Inventors: Gravenstein, Nikolaus, Melker, Richard J., Batich, Christopher D., Dennis, Donn M.
• Primary Examiner(s): Hunnings; Travis R
• Application Number:
  US12/772,583
• Publication Number:
  US 20100231385A1
• Time in Patent Office: 435 Days
• Field of Search: None
• US Class Current: 340/573.1
• CPC Class Codes: G08B 21/245 Reminder of hygiene compliance policies, e.g. of washing hands
• CPC Class Codes: G16H 40/20 for the management or administration of healthcare resources or facilities, e.g. managing hospital staff or surgery rooms

Abstract

Systems and methods are provided for monitoring use of hand washing agents to determine compliance with hand hygiene guidelines. A hand washing agent is provided with a detectable, volatile compound, such as odors, which is then rubbed onto a subject'"'"'s hands using the subject'"'"'s hand washing technique. After the hand washing event, the subject'"'"'s hand is then exposed to an detector (such as a badge), which includes a sensor capable of detecting the volatile compound, and an indicator that communicates detection of the volatile compound, indicating use of the hand washing agent and hand hygiene compliance.

Claims

1. A system for monitoring hand hygiene comprising:

a hand washing agent comprising a detectable, volatile compound for application to the hands of a subject; and

a detector comprising a sensor and an indicator operably connected to the sensor, wherein the sensor detects the detectable, volatile compound, wherein detection of said detectable, volatile compound by said sensor occurs without physical contact of the hands of said subject with said detector, wherein said system further comprises at least one of the following;

(a) the detector is in the form of a wearable or portable housing;

(b) when a subject performs appropriate hand washing measures, the subject passing his/her hands in close proximity to the detector, or waving his/her hands in front of said detector'"'"'s sensor, or placing his/her hands slowly in front of the detector, which will detect whether the detectable, volatile compound is present on or is emanating from the subject'"'"'s skin;

(c) said hand washing agent comprises 60%-95% ethanol, isopropanol, n-propanol, or any combination of these compounds.

2. The system of claim 1, wherein the hand washing agent is selected from the group consisting of:

alcohol-based hand rubs;

antimicrobial soaps;

antiseptic hand washes;

antiseptic hand rubs;

detergents;

soaps;

waterless antiseptic agents; and

surgical hand scrubs.

3. The system of claim 1, wherein the detectable, volatile compound is a taggant selected from the group consisting of:

dimethyl sulfoxide (DMSO), acetaldehyde, acetophenone, trans-Anethole (1-methoxy-4-propenyl benzene) (anise), benzaldehyde (benzoic aldehyde), benzyl alcohol, benzyl cinnamate, cadinene, camphene, camphor, cinnamaldehyde (3-phenylpropenal), garlic, citronellal, cresol, cyclohexane, eucalyptol, and eugenol, eugenyl methyl ether;

butyl isobutyrate (n-butyl 2, methyl propanoate) (pineapple);

citral (2-trans-3,7-dimethyl-2,6-actadiene-1-al);

menthol (1-methyl-4-isopropylcyclohexane-3-ol);

α

-Pinene (2,6,6-trimethylbicyclo-(3,1,1)-2-heptene);

sodium bisulfate, dioctyl sodium sulfosuccinate, polyglycerol polyricinoleic acid, calcium casein peptone-calcium phosphate, botanicals (i.e., chrysanthemum;

licorice;

jellywort, honeysuckle;

lophatherum, mulberry leaf;

frangipani;

selfheal;

sophora flower bud), ferrous bisglycinate chelate, seaweed-derived calcium, DHASCO (docosahexaenoic acid-rich single-cell oil) and ARASCO (arachidonic acid-rich single-cell oil), fructooligosaccharide, trehalose, gamma cyclodextrin, phytosterol esters, gum arabic, potassium bisulfate, stearyl alcohol, erythritol, D-tagatose, a GRAS compound, and mycoprotein.

4. The system of claim 1, where the detectable, volatile compound is either a halogenated compound or an isotope.

5. The system of claim 1, wherein the detectable, volatile compound is a taggant.

6. The system of claim 1, wherein the detector is in the form of a wearable or portable housing.

7. The system of claim 1, wherein the sensor is selected from the group consisting of:

high electron mobility transistors (HEMT), nuclear magnetic resonance (NMR), polymer based membranes—

chemoresistive (Cyranose);

polymer-surface acoustic wave (SAW) and electrochemical chemical array (Hazmatcad and Hazmatcad Plus);

spectroscopy-based analysis;

visible spectroscopy;

UV spectroscopy;

TIF TIFXP-1A Negative Corona Leak Detector;

negative ion capture sensors;

heated sensors/ceramic semiconductor sensors;

infrared absorption;

nuclear magnetic resonance spectroscopy;

photoemission spectroscopy;

Raman spectroscopy;

Fourier transform spectroscopy—

FTIR;

time-resolved spectroscopy;

flame spectroscopy;

plasma emission spectroscopy;

force spectroscopy;

dielectric spectroscopy;

circular dichroism spectroscopy;

refractory indices;

metal oxide sensors; and

sensors based on microcantilevers, molecularly imprinted polymers, and amplifying fluorescent polymers.

8. The system of claim 1, wherein the sensor is an electronic nose.

9. The system of claim 1, wherein the indicator comprises a computer processor in which visual, audible, and/or tactile results are provided.

10. The system of claim 1, wherein the indicator further comprises a processing means.

11. The system of claim 1, further comprising a communications device.

12. The system of claim 1, further comprising an electronic clock.

13. The system of claim 1, further comprising a means for active detection of the detectable, volatile compound.

14. The system of claim 13, wherein the means for active detection of the detectable, volatile compound is a suction pump that directs air flow to the sensor.

15. The system according to claim 14 wherein said suction pump is activated by an individual before hand washing or which is automatically activated by a means for establishing subject identity.

16. The system according to claim 1 wherein, when a subject performs appropriate hand washing measures, the subject passes their hands in close proximity to the detector, or waves his/her hands in front of said detector'"'"'s sensor, or places their hands slowly in front of the detector, which will detect whether the detectable, volatile compound is present on or is emanating from the subject'"'"'s skin.

17. The system according to claim 1, wherein the detector is located at a particular location.

18. The system according to claim 17, wherein the detector located at a particular location is situated at a hand washing station, near a dispenser for hand washing agent, at a door to a patient'"'"'s room, or at a door to a kitchen.

19. The system according to claim 18, wherein the frequency of hand washing is compared with the frequency of entry to specific locations.

20. The system according to claim 19 further comprising a means for ascertaining subject identity.

21. The system according to claim 20 wherein said means for ascertaining subject identity notifies a central computer system when a subject enters a particular location.

22. The system according to claim 21 wherein said means for ascertaining subject identity waits for the subject to wash his/her hands before leaving.

23. The system according to claim 1 wherein said detectable, volatile compound is microencapsulated, coated or incorporated into particle/polymers.

24. The system according to claim 23 wherein said microencapsulation, coating or incorporating into particle/polymers remain stable until released during hand washing thereby guaranteeing vigorous hand washing by said subject.

25. The system according to claim 1 which, in order for the system to record hand hygiene, hand washing is required to occur both before and after an encounter with a patient.

26. The system according to claim 1 comprising a plurality of sensors.

27. The system according to claim 1, further comprising a communication means for storing detection of detectable, volatile compound for storage in a database.

28. The system according to claim 1, further comprising a clock, activated on initiation of hand washing, and which communicates via an indicator a specified time that a subject should devote to a hand washing event.

29. The system according to claim 1 wherein, said hand washing agent comprises 60%-95% ethanol, isopropanol, n-propanol, or any combination of these compounds.

30. The system according to claim 1 wherein said sensor for detecting/quantifying the detectable, volatile compound utilizes a detection time of a few seconds.

31. The system according to claim 30 wherein said sensor detects the presence or absence of said detectable, volatile compound such that said indicator reports a “

pass”

or “

fail”

reading based on the presence or absence, respectively, of the detectable, volatile compound on or emanating from the subject'"'"'s skin, which information can optionally be fed to a central computer, whereby a subject'"'"'s compliance with hand hygiene measures can be determined.

32. The system according to claim 31 wherein, if said sensor does not detect the presence of said detectable, volatile compound, a reminder alarm is activated to remind said subject to wash their hands with a hand wash composition comprising said detectable, volatile compound.

33. The method according to claim 32 wherein said sensor detects the presence or absence of said detectable, volatile compound such that said indicator reports a “

pass”

or “

fail”

reading based on the presence or absence, respectively, of the detectable, volatile compound on or emanating from the subject'"'"'s skin, which information can optionally be fed to a central computer, whereby a subject'"'"'s compliance with hand hygiene measures can be determined.

34. The method according to claim 33 wherein, if said sensor does not detect the presence of said detectable, volatile compound, a reminder alarm is activated to remind said subject to wash their hands with a hand wash composition comprising said detectable, volatile compound.

35. The system according to claim 1 wherein said indicator, within a period of time after said subject has washed their hands and the indicator reflects the compliant hand wash status of said subject, said indicator communicates that said period of time has expired.

36. The system according to claim 35 wherein, when said indicator communicates that said period of time has expired, it does so by changing a green light on a badge worn by said subject to another color.

37. The system according to claim 1 wherein said system requires that the system must detect, store and document subject compliance in washing their hands before and after each medical procedure or encounter with a patient.

38. A method for monitoring hand hygiene comprising:

(a) providing a hand washing agent that includes a detectable, volatile compound for application to the hands of a subject;

(b) providing a detector that comprises a sensor capable of detecting the detectable, volatile compound and an indicator operably connected to the sensor; and

(c) communicating, using the indicator, when a detectable, volatile compound is detected by the sensor;

wherein detection of said detectable, volatile compound by said sensor occurs without physical contact of the hands of said subject with said detector, wherein said method further comprises at least one of the following;

(a) the detector is in the form of a wearable or portable housing;

(b) when a subject performs appropriate hand washing measures, the subject passing his/her hands in close proximity to the detector, or waving his/her hands in front of said detector'"'"'s sensor, or placing his/her hands slowly in front of the detector, which will detect whether the detectable, volatile compound is present on or is emanating from the subject'"'"'s skin;

(c) said hand washing agent comprises 60%-95% ethanol, isopropanol, n-propanol, or any combination of these compounds.

39. The method of claim 38, further comprising the step of sensing the detectable, volatile compound using the sensor comprising, when a subject performs appropriate hand washing measures, the subject passing their hands in close proximity to the detector, or waving his/her hands in front of said detector'"'"'s sensor, or placing their hands slowly in front of the detector, which will detect whether the detectable, volatile compound is present on or is emanating from the subject'"'"'s skin.

40. The method of claim 39, further comprising the step of storing data regarding when a detectable, volatile compound is detected by the sensor.

41. The method of claim 40, further comprising the step of analyzing the data.

42. The method of claim 41, further comprising the step of intervening based on the analyzed data.

43. The method of claim 38, further comprising the step of providing an electronic clock to identify time associated with detection of the detectable, volatile compound.

44. The method according to claim 38 wherein hand washing agent comprises 60%-95% ethanol, isopropanol, n-propanol, or any combination of these compounds.

45. The method according to claim 38 wherein said sensor for detecting/quantifying the detectable, volatile compound utilizes a detection time of a few seconds.

46. The method according to claim 38 wherein said indicator, within a period of time after said subject has washed their hands and the indicator reflects the compliant hand wash status of said subject, said indicator communicates that said period of time has expired.

47. The method according to claim 46 wherein, when said indicator communicates that said period of time has expired, it does so by changing a green light on a badge worn by said subject to another color.

48. The method according to claim 38 wherein said detectable, volatile compound is a taggant selected from the group consisting of:

dimethyl sulfoxide (DMSO), acetaldehyde, acetophenone, trans-Anethole (1-methoxy-4-propenyl benzene) (anise), benzaldehyde (benzoic aldehyde), benzyl alcohol, benzyl cinnamate, cadinene, camphene, camphor, cinnamaldehyde (3-phenylpropenal), garlic, citronellal, cresol, cyclohexane, eucalyptol, and eugenol, eugenyl methyl ether;

butyl isobutyrate (n-butyl2, methyl propanoate) (pineapple);

citral (2-trans-3,7-dimethyl-2,6-actadiene-1-al);

menthol (1-methyl-4-isopropylcyclohexane-3-ol);

α

-Pinene (2,6,6-trimethylbicyclo-(3,1,1)-2-heptene);

sodium bisulfate, dioctyl sodium sulfosuccinate, polyglycerol polyricinoleic acid, calcium casein peptone-calcium phosphate, botanicals (i.e., chrysanthemum;

licorice;

jellywort, honeysuckle;

lophatherum, mulberry leaf;

frangipani;

selfheal;

sophora flower bud), ferrous bisglycinate chelate, seaweed-derived calcium, DHASCO (docosahexaenoic acid-rich single-cell oil) and ARASCO (arachidonic acid-rich single-cell oil), fructooligosaccharide, trehalose, gamma cyclodextrin, phytosterol esters, gum arabic, potassium bisulfate, stearyl alcohol, erythritol, D-tagatose, a GRAS compound, and mycoprotein.

49. The method according to claim 38 wherein said detectable, volatile compound is microencapsulated, coated or incorporated into particle/polymers.

50. The method according to claim 49 wherein said microencapsulation, coating or incorporating into particle/polymers remain stable until released during hand washing thereby guaranteeing vigorous hand washing by said subject.

51. The method according to claim 38 wherein said monitoring requires the detecting, storing and documenting subject compliance in washing their hands before and after each medical procedure or encounter with a patient.

52. An apparatus for monitoring hand hygiene comprising:

a hand washing agent comprising a detectable, volatile compound for application to the hands of a subject; and

a detector comprising a sensor and an indicator operably connected to the sensor, wherein the sensor detects the detectable, volatile compound, wherein detection of said detectable, volatile compound by said sensor occurs without physical contact of the hands of said subject with said detector, wherein said apparatus further comprises at least one of the following;

(a) the detector is in the form of a wearable or portable housing;

(b) when a subject performs appropriate hand washing measures, the subject passing his/her hands in close proximity to the detector, or waving his/her hands in front of said detector'"'"'s sensor, or placing his/her hands slowly in front of the detector, which will detect whether the detectable, volatile compound is present on or is emanating from the subject'"'"'s skin;

(c) said hand washing agent comprises 60%-95% ethanol, isopropanol, n-propanol, or any combination of these compounds.