METHOD FOR DETECTION AND DISPLAY OF EXTRAVASATION AND INFILTRATION OF FLUIDS AND SUBSTANCES IN SUBDERMAL OR INTRADERMAL TISSUE

摘要

A method for the real-time visualization and detection of extravasated and or infiltrated fluid and substances, including blood, that occur near the cannulation site of an injection is described wherein illumination or transillumination with near infrared light is used to image the contrast in real-time between absorbing and nonabsorbing subdermal and intradermal structures of blood vessels and remaining surrounding tissue, foreign substances and other structures in order to establish a baseline image of the body area of interest, and any new image is monitored and compared with the baseline image to detect the extravasation and/or infiltration of fluids and substances, including blood, around a vein or artery into the subdermal or intradermal tissue.

主权项

1. A method for real-time visualization and detection of extravasted and/or infiltrated fluids and substances, including blood, that occur near the cannulation site of an injection comprising the steps of:
(a) providing a light source in the wavelength range of about 0.3 to about 1.0 micron; (b) illuminating a portion of the body near the intended site of an injection in at least one of a reflection mode and a transillumination mode; (c) providing a detector sensitive to light in said wavelength range of said light source for receiving said light transmitted from said portion of the body; (d) selectively filtering the light received by said detector using a filter having a narrow passband centered substantially on at least one wavelength in said wavelength range of said light source; (e) generating a first image from the filtered light to provide a baseline image of the subdermal and intradermal tissues in said portion of the body; (f) generating at least one additional image of said portion of the body during a procedure that includes an injection at said body portion; and (g) comparing said at least one additional image with said baseline image to detect changes near the vasculature in said portion of the body to detect extravasation or infiltration in said portion of the body.