Rabbit anaesthesia oxygen flow rates

RE: Rabbit anaesthesia oxygen flow rates

Susanna Taylor — Tue, 18 Sep 2018 14:26:16 GMT

Sorry late to the party... agree with James. But a few points

1- Unless you are measuring ET Iso, or have a high spec tec, keep your flow rate above 1L. The Tec 3s (most common vaporisers) are not reliable under 1L flow.

2- You do in fact have a 'Ayres T piece with a Jackson Rees modification'. 'Dr Jackson-Rees' added the rebreathing bag to the original open tube ended Ayres T piece. The APL valve was a later addition by, I believe, intersurgical! Just a little history lesson!

Excerpt taken from: http://www.anaesthesia.med.usyd.edu.au/resources/lectures/gas_supplies_clt/breathingsystems.html

Jackson-Rees modification of Ayre's T-Piece (Mapleson F)

Original T-piece by Phillip Ayre in 1937 for children; ventilation by occlusion of the open ended tube with fresh gas entering at a right angle to the tube..

Modified by Jackson Rees in 1950's by adding an open-ended 500 ml bag to allow respiratory monitoring and/or assistance, and a parallel entry of the fresh gas line at the patient connection.

Commonly used for paediatrics, esp.. neonates:

- light weight;
- low resistance -no valves.
- low deadspace
- good 'feel' of the lungs
- can be used for both spont and controlled ventilation

Deadspace is determined by the distance between fresh gas inflow point and the face. Specialised neonatal T-pieces direct FGF directly at the lips..

Disadvantages

- High FGF (esp.. in adults)
- Much less efficient than a circle system
- Dry gases unless humidified
- Scavenging issues
- can't be used for controlled ventilation with some modern machines

RE: Rabbit anaesthesia oxygen flow rates

Chris Geddes — Wed, 05 Sep 2018 09:40:30 GMT

Hi Alana, others,

I don't have anything to add to the excellent advice above, but, if anyone ever does have any questions around use of v-gel, please do contact us on info@docsinnovent.com, or through or Facebook page - or indeed our UK distributor (if that's where you're based) - Millpledge - and we'd be delighted to help.

Chris

RE: Rabbit anaesthesia oxygen flow rates

James Colver Cert. Ed, RVN — Mon, 03 Sep 2018 20:38:13 GMT

If you have a capnograph then you can stop worrying - as long as the rabbit is not rebreathing then your flow rate is fine!

With a capno you can tweak your FGF until it's spot on.

http://docsinnovent.com/downloads/Vet_Times_43_11_Kevin_Eatwell_Rabbit_Anaesthesia_Guidelines.pdf

RE: Rabbit anaesthesia oxygen flow rates

Ben Ogden — Mon, 03 Sep 2018 18:12:05 GMT

My advice is if you have invested in a range of V-Gels & a Capnograph, then get those companies in for training and get the most up to date info from them. I found the CPD from V-Gel detailed enough and backed up with papers.