VEIN IMAGING SYSTEMS AND METHODS

• US 20140046291A1
• Filed: 03/13/2013
• Published: 02/13/2014
• Est. Priority Date: 04/26/2012
• Status: Abandoned Application

• Current Assignee: Evena Medical, Inc.
• Original Assignee: Evena Medical, Inc.
• Inventors: Harris, Melvyn L., Ball, Frank J.
• Application Number:
  US13/802,423
• Publication Number:
  US 20140046291A1
• Time in Patent Office: Days
• US Class Current: 604/503
• CPC Class Codes: A61M 2005/1588 having means for monitoring, controlling or visual inspection, e.g. for patency check, avoiding extravasation
• CPC Class Codes: A61M 2205/3306 Optical measuring means
• CPC Class Codes: A61M 2209/04 Tools for specific apparatus
• 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

Abstract

Some embodiments of this disclosure relates to systems and methods for imaging a patient'"'"'s vasculature. For example, near infrared (NIR) light can be used to illuminate a target area and light that is reflected or scattered from the target area can be used for generate an image of the target area. In some embodiments, the system can be configured such that the image shows the presence, absence, or extent of infiltration or extravasation in the target area. The system can be configured to document that presence, absence, or extend of infiltration or extravasation at an infusion site. In some embodiments, an imaging system can be mounted onto a patient so that the imaging system can monitor an infusion site, and the imaging system can be configured to automatically detect the presence of infiltration or extravasation.

Claims

1-94. -94. (canceled)

95. A method of infusing a medical fluid into a patient, the method comprising:

actuating an infusion pump to infuse a medical fluid into a patient through an infusion site located on a body portion of the patient;

illuminating the body portion with near infrared (NIR) light from a light source, wherein a support member couples the light source to the patient such that light source is continuously oriented to direct light onto the body portion of the patient;

receiving light that is reflected or scattered from the body portion onto a light sensor, wherein the support member couples the light sensor to the patient such that the light sensor is continuously oriented to receive light from the body portion;

generating image data from the light received by the light sensor;

analyzing the image data using a controller that comprises one or more computer processors to automatically detect the presence of infiltration or extravasation in the body portion; and

automatically stopping the infusion pump to cease infusion of the medical fluid in response to a detection of infiltration or extravasation.

96. The method of claim 95, further comprising automatically posting an alarm, using the controller, in response to the detection of infiltration or extravasation.

97. The method of claim 95, further comprising sending the image data to a display in response to the detection of infiltration or extravasation.

98. The method of claim 95, wherein analyzing the image data comprises performing image processing on the image data using the controller to detect the presence of infiltration or extravasation.

99. The method of claim 95, wherein analyzing the image data comprises comparing the image data to a baseline image to detect the presence of infiltration or extravasation.

100. The method of claim 95, wherein analyzing the image data comprises analyzing a rate of change of the brightness or darkness of at least a portion of the image data.

101. A system for monitoring an infusion site on a body portion of a patient, the system comprising:

a light source;

a light sensor;

a support member configured to couple the light source and light sensor to the patient such that light from the light source is directed onto the infusion site, and such that the light sensor receives light from the infusion site to generate image data of the infusion site; and

a controller configured to;

analyze the image data and automatically detect the presence of infiltration or extravasation based at least in part on the image data; and

send an instruction to an infusion pump to stop infusion in response to a detection of infiltration or extravasation.

102. The system of claim 101, wherein the controller is configured to post an alarm in response to a detection of infiltration or extravasation.

103. The system of claim 101, wherein the controller is configured to send the image data to a display in response to the detection of infiltration or extravasation.

104. The system of claim 101, further comprising:

a supporting portion configured to be positioned generally adjacent the infusion site, wherein the light source and the light sensor are positioned in or on the supporting portion;

an extension portion configured to extend from the supporting portion such that at least a portion of the extension portion is positioned generally over the infusion site; and

one or more light guides configured to guide light from the extension portion to the light source and to guide line from the light source to the extension portion.

105. The system of claim 101, wherein the system comprises an imaging head that comprises the light sensor and the light source, wherein at least a portion of the imaging head is removably attachable to at least a portion of the support member, wherein the at least a portion of the support member is disposable, and wherein the at least a portion of the imaging head is configured to be reusable.

106. The system of claim 101, wherein the controller is configured to perform image processing on the image data to detect the presence of infiltration or extravasation.

107. The system of claim 101, wherein the controller is configured to compare the image data to a baseline image to detect the presence of infiltration or extravasation.

108. The system of claim 101, wherein the controller is configured to detect the presence of infiltration or extravasation based at least in part on a rate of change of the brightness or darkness of at least a portion of the image data.

109. A system for monitoring an infusion site on a body portion of a patient, the system comprising:

a light source;

a light sensor;

a support member configured to position the light source and the light sensor relative to the body portion of the patient such that light from the light source is directed onto the infusion site, and such that the light sensor receives light from the infusion site to generate image data of the infusion site; and

a controller configured to analyze the image data and automatically detect the presence of infiltration or extravasation based at least in part on the image data.

110. The system of claim 109, wherein the controller is configured to send an instruction to an infusion pump to stop infusion in response to a detection of infiltration or extravasation.

111. The system of claim 109, wherein the controller is configured to post an alarm in response to a detection of infiltration or extravasation.

112. The system of claim 109, wherein the support member is configured to couple the light sensor to the body portion of the patient.

113. The system of claim 109, wherein the system is configured to automatically generate image data of the infusion site and detect whether infiltration or extravasation is present at least once every 1 second to 5 minutes.

114. The system of claim 109, wherein the system is configured to monitor the infusion site for infiltration or extravasation on a substantially continuous basis.