Medical-surgical devices
作者： Thomas Cuthbert Mills , Stephen James Field , J. Michael Kennelly , Tina Greathouse
DOI:
关键词: Biomedical engineering 、 Extrusion 、 Catheter 、 Ultrasound imaging 、 Visibility (geometry) 、 Materials science
摘要: An embryo replacement catheter has a flexible extruded shaft of transparent polyurethane with bore extending along its length. Gas bubbles diameter in the range 5.mu. to 10.mu. are incorporated into thickness wall by adding gas during extrusion. The selected increase visibility under ultrasound imaging whilst still enabling material flowing be seen. inventive is not confined catheters.
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