Patents. An implantable endoluminal device that is fabricated from materials that present a blood or body fluid and tissue contact surface that has controlled heterogeneities in material constitution. An endoluminal stent-graft and web-stent that is made of an monolithic material deposited into a monolayer and...he endoluminal stent-graft is characterized by having controlled heterogeneities in the stent material along the blood flow surface of the stent and the method of fabricating the stent using vacuum deposition methods.
Formaldehyde is naturally produced in very small amounts in our bodies as a part of our normal, everyday metabolism and causes us no harm. It can also be found in the air that we breathe at home and at work, in the food we eat, and in some products that we put on our skin.
In view of its widespread use, toxicity, and volatility, formaldehyde is a significant consideration for human health. In 2011, the US National Toxicology Program described formaldehyde as  known to be a human carcinogen .ormaldehyde is a naturally-occurring organic compound with the formula CH 2 O. It is the simplest aldehyde and is also known by its systematic name methanal.