It's not hard to stay out of the muscle when you maintain constant awareness of where your cannula tip is. Also, by injecting from above vs. below its very hard to accidentally get into the muscle (and artery and vein) because of the shape of the pelvic bones prevents the cannula from pointing deep. Hope that helps!
Thanks for writing,I am happy to see you are aware of the risks, because the consequences of fat emboli are serious. As my peers have said, experience, above the muscle, no sharp cannulas, cannulla size, pressure used to inject are just some of the things being done to significantly reduce the risks. Find a Board Certified Plastic Surgeon who does a lot of this, he/she should be able to answer all your questions and let you know if you are a good candidate as well as a risk profile.Stephen M. Davis, MD, FACSCertified: American Board of Plastic SurgeryMember: American Society for Aesthetic Plastic SurgeryMember: American Society of Plastic SurgeonsMember: RealSelf Hall of Fame