RE: New to Humphrey ADE

Cyonica — Tue, 27 Oct 2020 17:55:34 GMT

That's exactly the guide I was talking about, thank you Ben! I couldn't find it and I only have a copy of it at work.

RE: New to Humphrey ADE

Ben Ogden — Mon, 26 Oct 2020 09:28:48 GMT

[quote userid="60272" url="~/001/veterinary-nurse-clinical/small-animal/anaesthesia/f/discussions/32074/new-to-humphrey-ade/176584#176584"]You should always leave the valve fully open. I often see people partially close it and I don't know why... that just increases circuit resistance. It's not the same as a normal circle system in that way. [/quote]

I see that too, it drives me potty!

RE: New to Humphrey ADE

Ben Ogden — Mon, 26 Oct 2020 09:27:47 GMT

www.vetnurse.co.uk/.../8156.Fresh-gas-flow-table-for-The-Humphrey-ADE_2D00_circle_2D00_-UK-Jan-2020.pdf

ADE in a nutshell. As Katherine says it's a really easy circuit once you have an understanding on how it works.

RE: New to Humphrey ADE

Cyonica — Mon, 19 Oct 2020 22:35:48 GMT

It's a wonderful circuit, and really easy to use once you understand it! They have information about it on their website. If the info on here isn't very helpful, I know they have a really good guide that walks you through it all, and I'm sure they'll be able to send it to you if you contact them. www.anaequip.com/.../

If a dog's over 7kg lean bodyweight then attach the soda lime cannister and it functions as a circle system, and for all cats and any dog under 7kg lean BW then leave the cannister off and it functions as a mini lack. You don't need to use high flow rates with it either way. The recommended flow rates are 70-100ml/kg/min for all cats and for dogs up to 7kg, and for dogs over 7kg to use 30ml/kg/min for the first 15 minutes (presumably to account for denitrogenation), and 10ml/kg/min afterwards. The minimum flow rate they say to use is 300ml/min, but I don't ever go below 500ml/min as most vaporisers are inaccurate below this rate, so realistically my patients are only ever on 500ml - 1L/min for maintenance.

You should always leave the valve fully open. I often see people partially close it and I don't know why... that just increases circuit resistance. It's not the same as a normal circle system in that way. It's got its own attachment in the valve that keeps the circuit closed until enough pressure builds up to open it, then it lets gas out through the scavenging. You'll see it as a little orange/red piece of plastic in the top of the valve that can move up and down. For this reason as well, when you do IPPV you don't need to screw the valve closed at all. Just hold your finger on the little orange/red thing to stop it popping up whilst you squeeze the bag, and that will do the same job. You only need to screw the valve closed to leak test it.

The website says it's been tested on patients as small as 1kg and has really low resistance, although I don't personally use it on patients under 2kg and I only use it on cats and dogs.