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Essential equipment: Snares
Purpose
Snares are essentially wire loops, which are used to capture/manipulate/remove wires, catheters and various other ‘foreign bodies’.
Description
All snares are variations on the good old cowboy lasso, in other words, they have a loop that can be rotated and manoeuvred onto a target and then tightened by advancing a catheter to close the loop.
Simple single-loop lasso design
The nitinol Amplatz GooseNeck snare is probably the best-known snare and several other snares share a very similar design ( Fig. 17.1 ). The snare is supplied with its own catheter, the GooseNeck catheter has a radio-opaque end-marker. This catheter can be shaped, if necessary, to increase manoeuvrability.
Measurements
There are three relevant measurements.
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