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| Number | Title | Issue Date |
| 4973305 | Method and apparatus for inserting and retaining an epidural catheter A method of making an epidural insertion of a catheter and means for retention therein whereby a double lumen catheter having an air and medication conduit are provided, and the air conduit has a retention balloon at the distal, epidural end and a pilot i... | 11/27/1990 |
