Cannula Model

Cannula Model

Top  Previous  Next

The pressure drops across some of the MSE system cannulae are shown below. The values are comparable with those found in many modern, inflow cannulae.

 

CannulaResistance

During VV-ECMO, the cannula model takes into account the relative positions of the tips of the drainage and return cannula(e). If these are positioned too closely, re-circulation will start to occur and oxygenation will be impaired.

 

Return cannula size can be set by the trainee in the range 15 - 24F using the 'Cannula Selector Interface'.

 

Selector

 

The effect of changing the size of the return cannula on pre-membrane pressure (at a flow rate of 4 lpm) is shown below.

Cannula Size and Flow