Humphrey ade

RE: Humphrey ade

Johnathan Prior — Tue, 17 Feb 2015 19:04:44 GMT

I know changing the ISO can take a few minutes to fully take effect. Dr humphreys showed me the calculation but due to low flo anaesthesia it can be up to 5 minutes in some cases for a patient to fully see the effects in ISO changes. So with an increasing heart rate for a light patient if you increased the ISO by 1% it would still take 5 minutes for those changes to be seen. Same if patient is too deep so be sure to disconnect and increase oxygen flo rate to flush the system through then reconnect

RE: Humphrey ade

springer — Tue, 17 Feb 2015 18:46:07 GMT

Thanx for everyones feedback, we have been doing the tests before each use. Have not found any leaks. I have nt pre filled the circuit for 2-5 mins before use, so maybe try that & we have three different size bags, depending on the size of patient.

thanx again

RE: Humphrey ade

Johnathan Prior — Sun, 15 Feb 2015 22:25:05 GMT

Checks need to be made before any anaesthetic for leaks. The soda lime is a main area to check it has been sealed fully With no soda lime in the screw holes.

Also are you pre filling the circuit? Turning the oxygen and ISO on (with the end of the circuit capped) for 2-5 minutes before connecting to patient ensures the patient is getting the correct amount of isoflurane when you connect Straight away.

checking correct bag size for patient weight also. Seen one practice I started at keep a 2 litre bag for a 10kg patient due to other circuits using that bag size.

Probably saying stuff you know but may just be one thing if its a continuing problem. Apart from some teething issues when first introduced I've never had a problem with ade circuit. Hope you find out the issue and have stress free GAs :)

RE: Humphrey ade

JaneRVN — Sun, 15 Feb 2015 09:28:18 GMT

Are you properly checking for leaks? It may be that if there is a small leak the flow rates are then lower than you think causing the issues. It's something Prof Humphrey is very up on - doing full leak checks daily.