Apparent manufacturing defect with special order needles used for transforaminal lps to administer nusinersen (spinraza).This approach lps enters fully at the side of the body (near the mid-axillary line, just above the iliac crest), not the midline of the back.The needle enters the spine through a nerve root foramen.The first procedure is done in interventional radiology (ir) using dyna ct to show that there is a safe path into the spine that avoids bowel, kidney and lung.If the first dose goes well, a subsequent dosing in dsu pa/pb using operating room c-arm fluoroscopy.The needles for these lumbar punctures (lp) need to be very long, i.E.At least 8 ¿ 10 inches (20 ¿ 25 cm).Special ordered needles called "new gertie marx needles", 25 gauge noncutting, in lengths ranging up to 21.5 cm (8.5 inch).These are made by imd inc.Yesterday, when performing a transforaminal lp in dsu, placed one of these needles into the subarachnoid space, tried to gently aspirate, and found inability to get a seal.Tried tuberculin syringes and t-connectors, as well as several different luer syringes.Opened a second needle from the same batch, and the same problem occurred.It looks as if the hubs are not made properly and they are too soft, and even with very gentle application of a syringe, they shred and leak.We ended up performing the transforaminal lp using a 22 g 20 cm chiba needle, obtained from ir.Using the chiba needle, the lp was straightforward, cerebrospinal fluid was sampled, the patient received dose of nusinersen, did fine.
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