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Lot number: 5258471.A titan pump, two cylinders, and a reservoir were received for analysis.Microscopic evaluation revealed surface abrasion on the pump inlet tubing, indicating repetitive contact between surfaces.Microscopic evaluation revealed the detachment end of the pump exhaust strain relief at the strain relief/pump body junction was rough and irregular, indicating sufficient stress was exerted to separate the site.A partial separation was noted through the strain relief of the longer pump exhaust tube.This was not a site of leakage.No functional abnormalities were noted with the pump.Microscopic evaluation revealed surface abrasion on the cylinder 2 exhaust tubing adjacent to the distal tubing /strain relief junction.Microscopic evaluation revealed the detachment end of the cylinder 2 strain relief was noted to be rough and irregular.No functional abnormalities were noted with cylinder 1 or cylinder 2.No functional abnormalities were noted with the reservoir.Based on examination of the returned product, the surface abrasion noted on the pump inlet tubing and the pump exhaust tubing attached to cylinder 2, matched in such a way to conclude that they had overlapped and abraded against one another while in-vivo.In addition, the rough surfaces of the detachment site through the strain relief of the pump exhaust tube indicated that sufficient stress(s) may have been exerted to separate the site while in-vivo.A separation of this type may then allow the loss of fluid, rendering the device inoperable.A review of the device history record confirmed that the devices from this lot met all specifications prior to release.A review of the complaint history database, non-conformances and capas revealed no trends for this lot.
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