Vessel Localization
Suna Seo
TRANSILLUMINATION
B. Contraindications
None
C. Precautions
Verify that the light source equipment has an intact heat-absorbing glass and infrared and UV filters (6).
D. Equipment
1. Transillumination source
a. High-intensity cold source with a fiberoptic cable (Fig. 15.1)
2. Alcohol swab
3. Sterile glove or disposable plastic covers
 FIGURE 15.1 Fiberoptic transilluminator placed on the palmar surface to visualize veins on the dorsum of hand. |
 FIGURE 15.2 LED transilluminator positioned to visualize a scalp vein. (Courtesy of Veinlite by Translite, Sugar Land, Texas.) |
 FIGURE 15.3 Otoscope placed on the palmar surface to visualize cephalic vein. |
E. Technique
1. Clean end of light source with an alcohol swab. Cover with sterile glove or disposable plastic cover.
2. Dim light in room. Some residual light is necessary to visualize operating field.
3. Set light source at low intensity and increase as needed for visualization.
4. Position probe to transilluminate vessel.
 FIGURE 15.4 Transilluminator placed on the palmar surface to visualize the veins on the dorsum during IV insertion. |
6. Compensate for distortion if light is not directly opposite the puncture site.
7. Do not maintain contact between light source and extremity for long periods of time.
 FIGURE 15.5 Transilluminator placed posteriorly to visualize the posterior tibial artery. |
