https://www.vetnurse.co.uk/f/clinical-discussions/28545/reservoir-bags Hi all, I was wondering if someone could jolt my brain. I cant remember the calculation to work out the appropriate size re-breathing bags for patients. I remember (TV) 6, with TV being 10-20ml/kg....I haven&#39;t used this for a long time and most ofen-USTelligent Community 10https://www.vetnurse.co.uk/thread/160223?ContentTypeID=1Tue, 16 Jun 2015 15:59:42 GMT1a0763ec-3885-442c-853e-6cef656dfec5:561e7ca7-f67f-49b0-98e1-4729251b4ffdSusanna Taylor<p>Hi. There are varying references to size of rebrething bag in different texts, although it is often glossed over. To be honest I don&#39;t think there is a hard and fast rule proven beyond doubt in vet med. &nbsp;Bear in mind that in humans they almost exclusively use 2L bags for adults that are generally bigger then our average large dogs, and 0.5/1L for paeds and children respectively. This is why they are sold they way they are.&nbsp;</p> <p>My general rule is 0.5 under 10kg, and 2 over. 1L is useful in certain cases, such as deep chested small dogs like whippets or manual IPPV in the 8-15kg range. I used to use 3L occasionally but I don&#39;t think now it is really necessary. &nbsp;</p> <p>TV is 10-15ml/kg in &gt;10 and &lt;10kg respectively.&nbsp;</p><div style="clear:both;"></div>