Up to 2005 existed two opposite official opinions: or protection against fatal concentration (p.3 tab.1), or full absence of protection from CO (in fabric masks and the bandages ordered for use by the population (p.1 tab.1). With acceptance of the standard (p.2 tab.1) all 5 levels of requirements on protection from CO for filtering self-rescuers turn out. It is possible to approve, that all the listed requirements are correct if them to consider with reference to possible variety of extreme situations. Chances when there is a necessity of protection against fatal concentration, in other situations protection from CO at all is not required.

The establishment of a share of such situations depends first of all on definition of an admissible level of influence CO on the person without means of protection (or in the self-rescuer without protective properties from CO). In this occasion also there is a whole spectrum of rather differing opinions presented in tab.2.

As follows from the data presented in таb.2, official opinions in occasion of admissible levels of influence CO on the person in extreme situations differ approximately on the order. Already it is impossible to explain such distinction variety of variants of influence as it is a question of one system: the person - monoxid carbon. It is necessary to assume, that essential distinction of opinions is caused not scientifically proved, and more likely conucture by reasons.

The fact is conclusive, that the norms established NPB 302-2001, are not a unique admissible level as it is represented to developers of self-rescuers. Formally it is necessary to be guided by state standard (p.4 таb.2) as the document having the highest status among listed in таb.2. Besides it is necessary to note, that the norm of 200 mg/?3 is value of shortterm maximum permissible concentration (it is norm for the personnel of the enterprises connected with repeated influence CO during the working experience), instead of an emergency limit of influence, hence, to individual emergencies for the population it has no attitude.

At the informal approach to the analysis of admissible norms of influence CO on the person it is necessary to lean on the extensive statistical material which has been saved up(which has been saved) more than for 100 years of studying of the given problem. It is known, that the degree of defeat of the person monoxid carbon is defined by the maintenance carbon (НвСО) in blood which in turn depends on size of operating concentration CO and expositions of infection. In таb.3 the generalized results of researches of communication of a degree of defeat of people with maintenance НвСО/1/are resulted.