You are restraining a Besenji dog for cephalic venipuncture. When the operator says 'Okay', he is most likely asking you to:

• A. Lift the thumb that is occluding the vein
• B. Release the animal from restraint
• C. Verbally indicate that he has made contact with the vein
• D. Roll the vein in the opposite direction

Answer: (A)

During cephalic venipuncture, the restrainer often occludes the vein with the thumb to make it stand out and stay stable while the site is prepared. When the operator says “Okay,” the cue is to lift that occluding thumb and release the vein so blood can refill the lumen. This prepares the vein for needle entry and helps ensure a smooth, successful draw. Releasing the animal from restraint or verbally indicating vein contact aren’t the cues in this moment, and rolling the vein in the opposite direction isn’t a standard step.