Step 3: Coating

Pour your vinegar into a small container. 
Place your choice of gauze pads in the vinegar. The pads will sink to the bottom when they are fully soaked.
With your pliers or surgical forceps grasp a single gauze pad and place it into your chitosan powder.
Gently shake the chitosan container side to side to fully cover the bandage.  Now let the bandage soak in the chitosan for 30 seconds

Double Dip (Its OK This Time.. Honestly)
Repeat this process 1 more time by dipping the powdered gauze into the vinegar and then back into the chitosan powder. A quick dip in the chitosan is all that is necessary for the second dip.

After you have completed coating the pad, place it on your cookie cooling tray or sterilized chicken mesh.  Have a baking sheet or tray below to catch any excess powder or vinegar droppings. 

You should notice that the bandage will swell after coating.  This is normal so don't run out of your house like a mad man/woman

You don't want to place the powder or granules directly on a wound to stop bleeding. The problem that occurs is some of the substance can become loose and enter the bloodstream. This will cause clotts to occur anywhere including the lungs heart and brain, which most likely could prove deadly.
Instead of Dry Ice to displace the O2, what about purging the cavity with something like Falcon 'Computer Dust Off'. It is similar to Nitrogen and displaces oxygen, and easier to find than Dry Ice these days. <br> <br>What would happen if you just sprinkled the chitosan from a gel cap driectly into the wound?
AllaQuix may be easier
So can we use the kaolin powder the same way?
We used these in the Army and I just wanted to add a note. If you have a serious gash or really deep cut or puncture and blood loss is a serious issue to the point that life may be in danger, don't mess around putting these guys on the outside of the wound. Stuff them in there as far as you can without doing more damage. Break them or tear them or fold them to get the bandage in there deep, because if an artery is damaged, just clotting the surface won't immediately stop that bleeding and their life could still be in danger. The closer you get that chitosan to the source, the faster it will stop the bleeding.
I think I might just get some Celox and sterile gauze off of Amazon for this kind of thing. <br> <br>An interesting instructable though!
how about using a vacume sealer after sterilizing the bag in boiling water and treating it with alcohol afterwards. that will *definetly keep out moisture as well as providing a waterproof package. <br><br>*i know its spelled wrong but spell check gives me crap answers like definitively and defiantly so i said screw it and left it as it is.
The bandages are only meant to be used on yourself and family/close friends. Unlike you, most people caught in an emergency don't know specific pressure points to stop bleeding. The bandages work just as well.
Absolutely no experience here, but strictly from what I've been reading, the consensus seems to be that using pressure points isn't terribly safe either if you are untrained, which is kind of the audience here.
Thanks much for this; putting together a library of improvised medicine for personal use and this looks like it will be a useful addition; never seen this before which is surprising.
&nbsp;At the very least - being a vegetarian I also avoid products made from animals.<br /> Why not just carry bandages. &nbsp;And vinegar on an open wound? &nbsp;I use vinegar a lot for cleaning &amp; if I get it on cuts or cracked hands...YOUCH!
Usually, <em>avoiding animal products </em>classifies as <em>Veganism</em>, and not <em>Vegetarianism</em>.<br /> <br /> Yes, there is a difference: one is a political movement, the other is a radical diet.<br />
vegan is not politic, it's considered religion. vegan people cannot shut up and keep their belief to themself, but they need to shout it and force people to join them too, like religion.<br>
I suppose some people are Vegans for religious reasons, but Veganism in general is a practical concept, not spiritual; I don't see how it can be related to religion. By the way, strong supporters of certain political groups love spewing out their ideals like a broken faucet...like Liberals! Ironically, most Vegans are Liberals. But, anyway, my point was that there is a severe line drawn between Vegetarianism and Veganism. Vegetarians choose their lifestyle for personal benefits; Vegans do it for the <em>greater cause</em>. (i.e. Someone who has a diet consisting of vegetables and nuts would be wrong in labeling themself as a Vegan if they go around wearing fur coats, wool sweaters, and leather shoes.)
political movement?<br><br>i'm vegan cause i dont want to cause any suffering in other animals.<br>(you know, not killing and not taking milk from any babies, not wearing dead animal skin or hair, etc. mine are buddhist reasons, important only to me, no biggie to others)<br><br>i never thought i'd be labelled 'political' for my choices! ha ha<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Not trying to start an argument here, but:<br /> <br /> &nbsp;&nbsp;&nbsp; These sound far better than normal bandages.&nbsp; Normal bandages are really hit-or-miss--it's generally just an &quot;apply direct pressure and pray&quot; type of thing.&nbsp; That usually works, but on big, deep cuts, the blood just keeps coming.&nbsp; I had a really bad encounter with barbed wire when I was twelve--I received medical attention within ten minutes of being injured and even so it took several butterfly and ace bandages just to slow the bleeding down, and I had to wait another fifteen minutes or so for it to really stop. These definitely would have helped.&nbsp; The only thing I can think of that seems to come close to these bandages in their (apparent, as I have not yet made them) ability to staunch bleeding is super glue, which works well for scratches but is impractical and dangerous on anything more than skin deep.<br /> <br /> &nbsp;&nbsp; And about the vinegar--it hurts, but it's very good at cleaning and disinfecting not only kitchens but cuts as well.&nbsp; It will help with the sterility of the bandages and might help disinfect the cut they're used on.&nbsp; It's also very good on fish and chips :)<br /> <br /> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; I'm not a doctor, so feel free to dispute anything here, and don't treat it as extremely sound medical advice.&nbsp; <br />
Good observation about the super glue.&nbsp; Researchers living in the Antarctic are plagued with deep non-healing cracks that form on their hands because of the extreme low humidity.&nbsp; Super glue was a desperation move; nothing else worked.&nbsp; Now it's being used for some surgical closures, at least externally.<br />
In 2009 I had an operation to remove a tumour in my pancreas which left me with a wound roughly half the length of my belt.<br> The funny thing is that it was covered with a type of thick rubbery sticky tape which came off after a couple of weeks to reveal that the doctors had somehow attached the sides of the wound together in a way that looks like it was stuck for an inch followed by an inch gap followed by being stuck together again for another inch all of the way across the wound.
&nbsp;I;m sorry - I didn't read this carefully or thoroughly enough.. &nbsp;My son had a head wound once &amp; the blood was non stop,,much like you report - this would prob'ly be good for that.<br /> Sorry.
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I'd like to see you leap upon the back of an elk and bring it down with those. We have nothing like the teeth of truly carnivorous animals. Also our intestines have more in common with herbivores than carnivores. That we are able to be omnivorous does not mean that we must be - we, at least in the more affluent societies, have the luxury to choose what we eat and use.
Our brain's have evolved to high intelligence, we may choose to be herbivores; but we're omnivores, from birth, we grow up omnivores by ourselves. We have canines, yes, but we also have knives, now don't get me wrong here, i'm attempting to state that we cant quite judge our diet nowadays, we've evolved past that, don't you think. However common sense itself dictates eating meat, the food chain revolves around us. Sure, we are able to live on beans, but it's not natural, like tofu, it's artificially, we're build to eat meat, sorry for ripping on your beliefs, but it's completely incorrect if your dragging human nature into the picture.
&quot;we're build to eat meat,&quot; you may mean we're built to eat meat <br>In other posts you have attacked other peoples spelling.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Don't worry about it.&nbsp; Hope these work if you try them! <br />
Just curious but, whats your reason for being a vegetarian.
These do work great. I remember when the military stocked up and swore by them. Now they are used with extreme caution. They were found to cause lots of deadly blood clots. Been awhile since I last did any med. training I'm not a medic. I do know that there is a limit to these being used. They have a high enough risk that they only trust a medic to know when to use them. There are people alive now that wouldn't be if not for this. On the other hand there's people that are dead because of this. Do not use as a powder. They used to for extremely deep wounds. Only use as bandage and only if necessary. Please do thorough research on them. It's also called Quick clot. I love the instruction just want to express caution.
Thanks for the redundancy. I would hope that anyone with a deep wound or gash would be going to a hospital. In the Army they primarily use these when the wound is on an artery, not a vein, so the blood that may get clotted doesn't go to heart causing C.A or A-Fib. Hospitals, however, are starting to use Protein-13 sprays for heavy bleeding and such. The chitosan bandage itself is almost out of date now.
I'm trying to understand the conversation here between microz and the author, and a lot of other Instructables I'm reading. Is EVERYONE texting comments from their cell phones, using some new kid code I'm not aware of??? I'm hearing seemingly intelligent people using words like (wud ???, gud?, mkng?, etc) You took the time to show your scientific acumen, so how about not dumbing down your speech. That would go a long way towards reinforcing your credibility. Truly, I'm not trying to be provocative here, I just want to understand. Or am I just being a loathsome old toadie, totally out of the loop???
Text... The murderer of the English language.
I agree. I think that its especially sad when someone uses poor language while claiming to be a biomaterial researcher. It makes a credible article look unbelievable.
&nbsp;Good work !!<br /> <br /> However I wud add few 'warnings' as the application is medical and will be coming in contact with body fluids and tissues.&nbsp;<br /> <br /> 1) Use of vinegar. - Yea, acetic acid is commonly used component in mking of these bandages..however 4% vinegar cn be cytotoxic or mildly hypersensitive when in contact with tissues for a long duration. Hence donot keep this 'homemade' stuff on wound for long (more than 2 hours)<br /> <br /> alternative - try using lactic acid&nbsp;<br /> <br /> 2) As powder frm tablet is used in the making and a proper 'substrate adhesion' is not described, there is a good chance of it flaking out from the product while in use. Chitosan acetate has known hemostatic property and there is a risk of emboli formation (clot in undesired location in blood vessels), if the powder flakes out and mixes with blood stream.&nbsp;<br /> <br /> Companies take adequate precautionary binding measures, but not in homemade stuff.<br /> <br /> 3) Chitosan DOESNOT kill bacteria. It is bacteriostatic and not bacteriocidal. Proper sterilization is required to ensure product does not causes infection.<br /> <br /> Overall good work on mking a cost effective way to produce this. But I would suggest using it for applications like 'Chelation of metals' and Flocculation. If to be used for medical applications, pls use only 'FDA approved products made from chitosan'. Dont take risks with safety.<br /> <br /> if any doubts, u can mail me at : microstartz (at) gmail.com<br /> <br /> p.s: Am a biomaterial researcher.<br /> &nbsp;<br /> <br />
&nbsp;Vinegar is the primary ingredient in the hem-con bandages. They use vinegar because it is acidic to kill the germs. (the chitosan doesn't kill bacteria) And your right, the bandage should not be left on for more than a couple hours. &nbsp;If I could send you one of the bandages I would. &nbsp;You would find that they aren't flakey or crusty in any matter. &nbsp;<br /> <br /> Thank you for your concern<br /> <br /> ERC<br />
&nbsp;@ERCBIENG<br /> <br /> Standard lyophilization takes away most of the solvent from the product. In your process, am not sure of it remains. More the acid remains in the product, it degrades faster and becomes useless. Just try heating the bandage in an oven for 30 minutes or more. If it turns dark yellow, it indicates the presence of more quantity of acid. That cn be allergenic too.&nbsp;<br />
&nbsp;The acidity is gone yes, but have you ever seen what powdered vinegar does to bacteria?
&nbsp;Its combined action of acid &amp; chitosan that mkes it gud candidate for infection control. Acid kills germs but need to be on higher concentration (which obviously is not gud for living tissues). Also there are germs tht cn survive in high acidic pH.&nbsp;<br /> <br /> -- not mking this a scientific debate.....jus pointing out certain concerns :)<br /> <br /> On another note, &nbsp;Potato peels can also be an excellent quick hemostat (rub it on wounds, cellulose in it cn easily stop minor bleeds)<br /> <br /> <br />
All that is released in the dry freezing is water. So when water is added (via blood) the vinegar reacts and creates an acidic solution killing bacteria that could be around the wound. The research done on the army chitosan bandages showed that 99% of bacteria died. I am using the exact same ingredients provided by my research that hemcon uses. Obviously these bandages are not as good as the manufactured ones but they could still save your life. Thank you for you questions
1. Concentrated acetic acid has some anti-bacterial properties, but it will not eliminate all strains.<br> <br> 2. The acetic acid is ONLY used because Chitosan is INSOLUBLE at neutral pH in water. It has absolutely nothing to do with any bacteriocidal properties.<br> <br> 3. Acetic acid MUST, to some degree, come off as vapor during the freeze drying process (if you want to know why, look up the vapor pressure properties of acetic acid or just open up a bottle of vinegar and realize that you smell something beside water for a reason...)<br> <br> 4. When we lyophilize our bandages - using an actual freeze dryer - the condenser is filled with ice that is laced with acetic acid due to the sublimation of that constiuent. If you have a power outage and the condenser warms up to allow the flow of these condensed fluids in to your vacuum pump, you will not have a good looking vacuum pump for long (not that we know from experience...).<br> <br> Just wanted to clear up some misguided perceptions that have come about during this discussion
'Powdered vinegar'?? Vinegar is an aqueous solution of acetic acid, which is a *liquid*. It's boiking point is just above that of water, and it is less polar than water so it will also sublime away in the dry ice treatment. There will be remnant acetic acid in the bandages, but these are first aid items, designed to keep you from bleeding to death on the way to the hospital, they're not to be used as band-aids to keep wounds clean.
I agree. These bandages are for emergency uses only and they are meant to get you to the hospital. What I meant by vinegar powder was the remnants of the solution left after sublimation. The vinegar is what is said to kill bacteria in HemCon Bandages (the military brand)

About This Instructable




Bio: I am a Biomedical Engineer going to be an ICU doctor. I love DIY and conversing ideas with intellectual people. I am a Seventh-Day Adventist ... More »
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