Subcutaneous veins depth measurement using diffuse reflectance images.

Area of Science:

• Biomedical Optics
• Medical Imaging
• Vascular Access Technologies

Background:

• Intravenous (IV) procedures are frequently complicated by poor visualization of subcutaneous veins.
• Current vein locators cannot assess vein depth, leading to issues like mis-punctures and difficult vascular access.
• Accurate vein depth and thickness assessment is crucial for improving the success rate of IV insertions.

Purpose of the Study:

• To propose and demonstrate a novel imaging system for measuring subcutaneous vein depth and thickness.
• To overcome the limitations of existing vein locators by providing depth assessment capabilities.
• To enhance the reliability and success of vascular access procedures through improved vein visualization.

Main Methods:

• Development of an imaging system utilizing diffuse reflectance at three isosbestic wavelengths.
• Application of the Monte Carlo (MC) method and an optical density (OD) ratio to a multi-layer diffuse reflectance model for measurements.
• Validation of the optical system's results through comparative ultrasound measurements in 11 volunteers.

Main Results:

• The proposed optical system demonstrated proof-of-principle for measuring subcutaneous vein depth and thickness.
• Experimental trials showed good agreement between the optical method and ultrasound measurements for vein depth.
• Vein thickness measurements showed some unreliability due to the collapsible nature of vein walls under pressure.

Conclusions:

• The developed optical imaging system shows promise for non-invasively determining subcutaneous vein depth.
• Further refinement is needed to address the challenges in accurately measuring vein thickness due to wall collapsibility.
• This technology has the potential to significantly improve the accuracy and efficiency of intravenous procedures.