On a recent bike trip I slipped on a gravel road and got abrasion around the knee. The wound was dirty with gravel dust and I instinctively cleaned it with water from my drinking bottle. Then I went to a pharmacy and got it disinfected (Octenisept, wound disinfectant) and then covered with a sterile patch. A few days later I want to my physician and she did the same thing again.
There are a lot of affordable first aid kits available in outdoor shops and I want to get one for the next trip. All of them contain various bandages and compresses. Disinfectant spray seems to be missing, though. My experience now is that the essentials for abrasions are spray and some bandage to keep out the dirt.
While trying to research this, I found a help page of the German Red Cross stating that it is forbidden to (a) touch, (b) clean, (c) apply powder, creams, sprays, disinfectants and (d) remove foreign matter. Exceptions are just thermal and acid burns as well as rabis bite wounds. Any wound must be treated by a doctor as soon as possible.
If I apply that to my case, I would have taken a bandage from my (to be purchased) first aid kit and wrap it around the wound with all the dust still in it. Then I would have to go to the ER of the next hospital.
In contrast, the manufacturer of the spray writes that it intended for small wounds like cuts and abrasions that happen during sports. And it gives instructions for usage, so this implies that a layperson should apply it to wounds.
Perhaps it is also a legal issue? The Red Cross addresses the general public which tries to help but sometimes overdoes it. So they just state that one should be very conservative when helping. Say one applies the wrong kind of disinfectant spray and it makes it just worse. In Germany you are not liable if you just try to help (to some extent). Perhaps this waiver stops right where you apply things and not just a sterile bandage? So even though in this particular situation it would be the right thing, a layperson would not know and therefore the general advice is conservative?
Please excuse my medical naivity, but isn't applying water and then desinfectant spray better than just wrapping up the dirt?