Modification of Bigelow's extractor
The evacuator was designed by Sir Peter Freyer.
Sir Peter Freyer's pageView Freyer's page
It was, basically, a modification of Bigelow's evacuator and was illustrated in many of Freyer's books. The instrument was connected to an evacuation catheter through which the bladder contents were aspirated; the evacuation catheter could be inserted using its obturator.
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