For clarification, further information or specific questions, please contact our Medical Help Desk by calling 1-800-310-9556, Option 1 (or direct dial 41 Eligibility and Donor Self-Screening Information The goal of the UCLA Blood & Platelet Center is to provide patients with safe blood collected from volunteer donors. Like all. Actual donation–the amount of blood to be donated (either 350cc or 450cc) will depend on the donor’s weight and blood pressure….