Dear foreveryoung908, While it’s certainly true that many naturopathic and homeopathic products such as Ginko, ginger, glucosamine and antioxidant juices can affect platelet function and tint the blood excessively leading to bruising or even a hematoma following surgery. A small and accidental amount of blueberry juice injection is extremely unlikely to alter your coagulation profile. I’d feel quite confident not being concerned leading up to your surgery, but of course, if you’re having an aneurysm clip this would be far more concerning than if you’re having cosmetic plastic surgery. Please review with your plastic surgeon to ensure they agree with this advice and I’m sure everything will turn out well. R. Stephen Mulholland, M.D. Certified Plastic Surgeon Yorkville, Toronto