Researchers have developed a fabric made from compounds used by the body to clot blood that could become a "natural bandage."
The nano-fiber mat is spun from strands of fibrinogen, which are 1,000 times thinner than human hair, and could be placed on a wound and never taken off, as eventually it would be absorbed by the body.
Typically, when bandages or gauze are placed on a wound to stop bleeding, the bleeding starts up again when the bandage is ripped off. Since the "natural bandage" does not always need to be removed, it could be placed directly on the bleeding site to start the clotting process and would minimize blood loss while encouraging natural healing.
The mat is made out of fibrinogen, a natural compound found in the bloodstream. When you get cut, your body’s clotting mechanism causes fibrinogen to be broken down and converted to fibrin. Fibrin holds the clot together and keeps it from dissolving quickly. After the clot is formed, the fibrin meshwork aids in the healing process.
Researchers have made the fibrinogen fibers to be nearly the same dimensions as are formed in a natural blood clot. Therefore, the body will accept the mat and promote natural healing.
The mat would be useful for a variety of purposes including minor cuts, battlefield wounds and bleeding in surgeries, where surgeons could apply the mat and leave it there, researchers mentioned.
Using the same technique that they used for the mats, researchers have also made synthetic blood vessels from collagen that are six times smaller than those available to doctors now.
Nanoletters February 12, 2003
Amazing new benefits from nanotechnology are on the horizon. If you aren’t familiar with this process I have included a description below from Zyvex, the first molecular nanotechnology company:
Manufactured products are made from atoms. The properties of those products depend on how those atoms are arranged. If we rearrange the atoms in coal we can make diamond. If we rearrange the atoms in sand (and add a few other trace elements) we can make computer chips. If we rearrange the atoms in dirt, water and air we can make potatoes.
Today’s manufacturing methods are very crude at the molecular level. Casting, grinding, milling and even lithography move atoms in great thundering statistical herds. It's like trying to make things out of LEGO blocks with boxing gloves on your hands. Yes, you can push the LEGO blocks into great heaps and pile them up, but you can't really snap them together the way you'd like.
In the future, nanotechnology will let us take off the boxing gloves. We'll be able to snap together the fundamental building blocks of nature easily, inexpensively and in most of the ways permitted by the laws of physics. This will be essential if we are to continue the revolution in computer hardware beyond about the next decade, and will also let us fabricate an entire new generation of products that are cleaner, stronger, lighter and more precise.
It's worth pointing out that the word "nanotechnology" has become very popular and is used to describe many types of research where the characteristic dimensions are less than about 1,000 nanometers.
For example, continued improvements in lithography have resulted in line widths that are less than one micron: this work is often called "nanotechnology." Sub-micron lithography is clearly very valuable (ask anyone who uses a computer!), but it is equally clear that lithography will not let us build semiconductor devices in which individual dopant atoms are located at specific lattice sites.
Many of the exponentially improving trends in computer hardware capability have remained steady for the last 50 years. There is fairly widespread belief that these trends are likely to continue for at least another several years, but then lithography starts to reach its fundamental limits.
If we are to continue these trends we will have to develop a new "post-lithographic" manufacturing technology that will let us inexpensively build computer systems with mole quantities of logic elements that are molecular in both size and precision and are interconnected in complex and highly idiosyncratic patterns. Nanotechnology will let us do this.
When it's unclear from the context whether we're using the specific definition of nanotechnology (given here) or the broader and more inclusive definition (often used in the literature), we'll use the terms "molecular nanotechnology" or "molecular manufacturing."
Whatever we call it, it should let us:
There is a brief and accessible video introduction to the basic idea of nanotechnology (Windows Media Player 38 kilobits/second or 165 kilobits/second) from Big Thinkers "Ralph Merkle: Nanotechnology."