Information was received from a foreign healthcare provider (hcp) via a manufacturer representative regarding a patient who was receiving gabalon at an 0.
05% at 30 mcg/day in an intrathecal drug delivery pump for spinocerebellar degeneration (hereditary spastic paraplegia).
It was reported that on (b)(6) 2017 a pump implantation was conducted from around 14:00 on the day.
The catheter implantation site was th9 (reported as catheter replacement).
The operation procedure was completed at 17:00 without any issues.
It was noted that the higher position of the insertion location was th/l1 and the lower position as close to the lower end of the l1 spinal cord region.
It was reported that the patient complained about foot pain, a pain in their little toes, around the pinky toe, and soles when they were back in their room.
It was reported that the pain was l5/s1 pain in the lower left leg that started immediately after the first surgery.
There was no reported paralysis.
The patient was followed-up with until the next morning.
The patient¿s pain was eased the next morning on (b)(6) 2017, however, the ¿pain observed repeatedly afterwards¿.
The physician decided that the ¿patient to be followed up¿ until around 15:30 on monday.
Initially, this pain was reported as not related to the investigational drug, catheter, pump and programmer but it was unknown if it was related to the surgical procedure.
Further, the relationship to itb therapy was not thought to be strong because the patient already had a slipped, displacement, of the l5 vertebra before the surgery.
Therefore, it was believed that the patient's posture during the surgery may have been related to the pain.
It was reported that it was considered that the therapy was remotely related with the reported pain and on (b)(6) 2017 it was reported that this was related to the catheter and surgical procedure.
Motor paralysis was not observed.
The pain was temporarily improved by a l5/s1block.
Since this was only temporary, epidural anesthesia was performed.
As pain improvement was not observed, pressure due to the catheter at the cauda equina was suspected and catheter explant was conducted.
Right after the procedure, the pain immediately disappeared.
A spinal ct was done immediately after the surgery and a catheter was inserted from between th12/l1, but no particular spinal compression was discovered.
So, it was decided that the epidural anesthesia would be carried out followed by observation.
The physician assessment indicated the implant site was as high as th12/l1 and "conus medullaris was near lower end of conus medullaris.
" it was further indicated that before catheter explant, the pain resolved due to opening up the "wounded area" with local anesthetic and loosening the anchoring device.
The pain was considered to be a result of cauda equina nerve compression due to the catheter, rather than contact with the catheter.
It was further stated another contributing factor was that the catheter was stiffer that the previous one.
It was noted that the drug administration was discontinued on (b)(6) 2017.
The event outcome was considered recovered as of (b)(6) 2017.
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