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Spinal-epidural administration system

  • US 5,846,226 A
  • Filed: 05/12/1997
  • Issued: 12/08/1998
  • Est. Priority Date: 05/12/1997
  • Status: Expired due to Fees
First Claim
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1. A system for transdural administration of anesthesia, the system comprising:

  • a first needle assembly, the first needle assembly including a needle shaft having an internal lumen, a hub fixed to one end of the shaft, the hub being in communication with the lumen, the lumen being open at the other end of the shaft, the shaft being of a length sufficient to enter into the epidural space of a patient, a second needle assembly, the second needle assembly comprising a second needle shaft, the second needle shaft being hollow, the second needle shaft having an outer diameter less than the diameter of the lumen, the second needle shaft being slidably receivable through the hub and into the lumen, and means for adjustably fixing a selected axial position of the second needle assembly relative to the first needle assembly upon rotation of one of the needle assemblies relative to the other needle assembly.

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