The Bigelow evacuator was a vital part of Henry Jacob Bigelow's new operation of litholapaxy.
For the first time, Bigelow showed that the operation of blind litholopaxy (breaking up a bladder stone with a instrument passed along the urethra, without actually looking into the bladder) could be carried out in a single sitting.
The evacuator was used to wash out all the stone fragments via a Bigelow evacuating catheter (pictured below).
This evacuator is in the Derby Collection. It is missing its glass collecting bowl, as can be seen from the diagrammatic view below.
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