EXTRAVASATION AND INFILTRATION DETECTION DEVICE

• US 20140228686A1
• Filed: 08/29/2012
• Published: 08/14/2014
• Est. Priority Date: 09/02/2011
• Status: Active Grant

• Current Assignee: Battelle Memorial Institute
• Original Assignee: Battelle Memorial Institute
• Inventors: Bouton, Chad E.
• Granted Patent: US 11,234,608 B2
• Time in Patent Office: Days
• US Class Current: 600/442
• CPC Class Codes: A61B 5/0022 Monitoring a patient using a global network, e.g. telephone networks, internet
• CPC Class Codes: A61B 5/0507 using microwaves or terahertz waves
• CPC Class Codes: A61B 5/0537 Measuring body composition by impedance, e.g. tissue hydration or fat content
• CPC Class Codes: A61B 5/4839 combined with drug delivery
• CPC Class Codes: A61B 5/4875 Hydration status, fluid retention of the body
• CPC Class Codes: A61B 5/4878 Evaluating oedema
• CPC Class Codes: A61B 5/6824 Arm or wrist
• CPC Class Codes: A61B 5/7203 for noise prevention, reduction or removal
• CPC Class Codes: A61B 5/7246 using correlation, e.g. template matching or determination of similarity
• CPC Class Codes: A61B 5/7282 Event detection, e.g. detecting unique waveforms indicative of a medical condition A61B5/4094, A61B5/4818, A61B5/349, A61B5/0823 take precedence
• CPC Class Codes: A61B 8/08 Detecting organic movements or changes, e.g. tumours, cysts, swellings A61B8/02 - A61B8/06 take precedence
• CPC Class Codes: A61B 8/42 Details of probe positioning or probe attachment to the patient
• CPC Class Codes: A61B 8/4472 Wireless probes
• CPC Class Codes: A61B 8/56 Details of data transmission or power supply
• CPC Class Codes: A61M 2205/3317 Electromagnetic, inductive or dielectric measuring means
• CPC Class Codes: A61M 5/16831 Monitoring, detecting, signalling or eliminating infusion flow anomalies low-level float-valves causing cut-off A61M5/40; indicating or recording presence, absence or direction of flow in general G01P13/0066
• CPC Class Codes: A61M 5/16836 by sensing tissue properties at the infusion site, e.g. for detecting infiltration detecting tissue temperature for diagnostic purposes A61M39/0247
• CPC Class Codes: F04C 2270/041 Controlled or regulated

Abstract

An integrated device of a patch and sensor assembly detects extravasation or infiltration. A transmitter is positioned to direct power into a body portion. A sensor is positioned to receive the power transmitted through the body portion. A substrate is attachable to an outer surface of the body portion and supports the transmitter and the sensor. A signal processor is coupled to the transmitter and the sensor for detecting a change in a fluid level in the body portion from extravasation or infiltration based on the power received by the sensor. A power supply is coupled to the transmitter and the sensor. An indicator is responsive to the signal processor to indicate a detected change in a fluid level in the body portion from extravasation or infiltration.

Claims

1-14. -14. (canceled)

15. An apparatus for detecting extravasation, comprising:

a transmitter positioned to direct power into a body portion;

a sensor positioned to receive the power transmitted through the body portion;

a signal processor coupled to said transmitter and said sensor for detecting a change in a fluid level in the body portion from extravasation or infiltration based on the power received by said sensor;

a power supply coupled to said transmitter and said sensor;

a substrate attachable to an outer surface of the body portion and supporting said transmitter, said sensor and at least one of said signal processor and said power supply;

an indicator responsive to the signal processor to indicate a detected change in a fluid level in the body portion from extravasation or infiltration; and

wherein said substrate supports said signal processor, said power supply and said indicator.

17. The apparatus of claim 15, further comprising a fluid guiding component positioned on the substrate.

18. The apparatus of claim 15, further comprising a marked transparent substrate for exposing a vascular structure of the body portion.

19. The apparatus of claim 15, wherein the transmitter comprises a Radio Frequency (RF) transmitter and the sensor comprises an RF sensor.

20. The apparatus of claim 19, further comprising an RF absorbing layer externally disposed over at least a portion of the transmitter, sensor and substrate.

21. The apparatus of claim 15, wherein the transmitter comprises an ultrasonic transmitter and the sensor comprises an ultrasonic sensor.

22. The apparatus of claim 21, wherein the signal processor is further for detecting the change in the fluid level in the body portion from extravasation or infiltration based upon changes in amplitude and phase for propagation of the directed power.

23. The apparatus of claim 15, wherein the indicator indicates a selected one of a deactivated state, a baseline state, and a fluid detected state.

24. The apparatus of claim 15, wherein the indicator indicates a range of sensed values of the power sensed at the sensor, the substrate comprising a flexible material for physical palpation.

25. The apparatus of claim 15, wherein the substrate comprises wound dressing material.

16. (canceled)

26. A device for detecting extravasation, comprising:

a transmitter positioned to direct power into a body portion;

a sensor positioned to receive the power transmitted through the body portion;

a signal processor coupled to said transmitter and said sensor for detecting a change in a fluid level in the body portion from extravasation or infiltration based on the power received by said sensor;

a power supply coupled to said transmitter and said sensor;

an indicator responsive to the signal processor to indicate a detected change in a fluid level in the body portion from extravasation or infiltration;

a substrate attachable to an outer surface of the body portion and supporting said transmitter, said sensor, said signal processor, said power supply, and said indicator; and

a fluid guiding component positioned on the substrate, the transmitter and sensor positioned relative to the fluid guiding component to detect fluid extravasation or infiltration arising from fluid insertion to a vascular structure.

27. A method for detecting extravasation or infiltration, comprising:

inserting a fluid injection conduit into a vascular structure in a body portion;

activating detection circuitry attached to a substrate to obtain a baseline measurement for a power waveform transmitted into the body portion;

injecting fluid into the vascular structure via the fluid injection conduit;

detecting a change in the power waveform by the detection circuitry due to extravasation or infiltration; and

determining a duty cycle for the detection circuitry required to effectively monitor the type of fluid being injected into the body portion and to minimize power consumption.

28. An apparatus for detecting a change in a body portion, comprising:

a transmitter positioned to direct power into a body portion;

a sensor positioned to receive the power transmitted through the body portion;

a signal processor coupled to said transmitter and said sensor for detecting a change in the body portion based on the power received by said sensor;

a power supply coupled to said transmitter and said sensor;

a substrate attachable to the body portion and supporting said transmitter, said sensor, and at least one of said signal processor and said power supply; and

an indicator provided on said substrate responsive to the signal processor to indicate a detected change in the body portion.

29. The apparatus of claim 28, wherein the substrate supports said signal processor and said power supply.

30. The apparatus of claim 29, further comprising a fluid guiding component positioned on the substrate.

31. The apparatus of claim 29, wherein said signal processor detects a change in a body portion comprising a change in fluid level in the body portion.