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D a4: weight - 116.6 kg d6: implanted date: device was not implanted d7: explanted date: device was not explanted the actual device was not returned for evaluation.Reproductive testing was performed a current guidewire sample.The sample was inserted into a metallic needle and withdrawn from it in the manner of the guidewire sample having contact with the metallic needle.The urethane coating was sheared off from the guidewire sample.Magnifying inspection of the sheared urethane outer layer found that it had a semi-circumferential groove with the shear cross-section being in the smooth state indicating that it had been sheared with a sharp tool.The production lot number was not provided by the user facility, which prevented a meaningful review of the device history record.Ifu states: do not use the glidewire with devices which contain metal parts such as atherectomy catheters, laser catheter, or metal introduction devices as they may cause the glidewire plastic coating to shear and/or sever the wire.Do not manipulate or withdraw the glidewire through a metal entry needle or a metal dilator.Manipulation and/or withdrawal through a metal entry needle or a metal dilator may result in destruction and/or separation of the outer polyurethane coating requiring retrieval.A plastic entry needle is recommended when using this wire for initial placement.It is likely that the actual sample may have been withdrawn through a metallic device in the manner of it having contact with the metallic device, resulting in shearing of the urethane outer layer.The exact cause of the reported event cannot be definitively determined based on the available information.Terumo medical products (tmp) (importer) registration no.2243441 is submitting this report on behalf of ashitaka factory of terumo corporation (manufacturer) registration no.9681834.Exemption number e2015022.
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The user facility reported a glidewire was involved in a case that triggered an investigation by the california department of public health.An rn (not involved in the case) made a statement that the product specifically was not at fault as defective, but was involved in a potential misuse.The patient was in stable condition, and the procedure outcome was successful.Additional information was received on july 13, 2018.The statement "involved in a potential misuse" was reported to mean that the user went against ifu.The procedures being performed were right cystoscopy, urethral catheter placement, right pyelogram, and attempted right percutaneous nephrolithotomy.The tip of the wire was retained within the lower pole of the calyx and removal was unsuccessful.Per post-op report - open ended catheter.The c-arm was then brought in at this time and a scout image performed which showed a right staghorn calculus encompassing entirety of the right renal collecting system.A retrograde pyelogram was then performed using 50 percent dilute contrast through the open-ended catheter which showed very little calyceal dilatation.As this time, multiple attempts were made assessing, at first the upper pole calyces which were unsuccessful and due to the inability of passing wire beyond the stone down to the bladder and ultimately, they were able to access the lower pole calyx as the angle-tip 0.035 glidewire was advanced.It had apparently wrapped around the stone as well as curled on itself into what appeared to be a knot.Multiple attempts were made at removing it and then they were ultimately able to pull the wire back, however, it frayed the distal aspect of it and it was retained within the lower pole of the calyx.Subsequently, multiple/several additional attempts were then once again made gaining access however, all unsuccessful.The decision was made at that time, due to the inability to obtain purchase, to terminate any further attempts.
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