It was reported during insertion the needle became detached.The physician did not thread the wire before use as she normally does, so she was not aware of any issue until attempting to use on the patient.When the needle was inserted into the patient's artery and the physician saw the flash of blood in the chamber she then tried to thread the wire but wasn't able to fully advance it.It was noted that "this isn't unusual because of differences in patient anatomy or because of a slight bend in the catheter as it flashes." in order to salvage the catheter itself, the physician threaded the catheter down to the skin, planning to do a through and through on the artery and then pull back.At this point, the needle portion of the catheter fell off of the flash chamber.She was able to extract the needle and wire by hand leaving only the catheter still in the patient.The pressure tubing was connected as normal.The cannula became detached at the hub where the needle meets the flash chamber.There was no significant delay in treatment and no harm was caused to the patient.
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(b)(4).Device evaluation: the report that the needle cannula detached from the hub during insertion of the radial artery device was confirmed.One used 20 ga radial artery device was returned without the catheter.Visual examination revealed the needle was observed to be separated from the hub.Dried blood was observed inside the guide wire tube and the guide wire / handle was stuck in the retracted position.No damage was observed during microscopic examination of the needle cannula, needle hub, and guide wire.Additionally, no adhesive residue was observed on the needle cannula or needle hub.The outside diameter of the needle cannula measured.0285 inches which meets the.0280/.0285" requirement of the needle drawing.Using pin gages, the inside diameter of the needle hub measured.030 inches which meets the.0290/.0310" requirement of the drawing.A device history record review was performed and did not reveal any manufacturing related issues.Since it appears that cannula was not sufficiently bonded into the hub, the probable cause of this issue is manufacturing related.
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