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Featuring a Tuohy Epidural needle with rear outlet for passage of Sprotte Spinal needle. By eliminating friction during the spinal needle's passage through the Tuohy, the important tactile sensation of dura puncture is unobscured. Further, dura puncture location is certain to not coincide with subsequent catheter contact with dura.
This much discussed technique combines the low failure-rate and reduced latency period of spinal anaesthesia with the option of prolonging anaesthesia through the peridural catheter as required. Combining an epidural needle with the Standard Sprotte Spinal needle offers the clinician the instruments of choice to perform CSE through a single puncture.
Top: Once spinal needle is advanced to desired depth, clamp is closed, thus fixing the needle tip in place. The stylet (whose cap is orange in photo) may now be removed and spinal anesthetic introduced.
Middle: Upon administration of spinal anesthetic, Epispin Lock is twisted free of the Tuohy hub and removed together with the Sprotte spinal needle.
Bottom: The epidural catheter can now be introduced into the Tuohy cannula, which remains in position.