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As reported, the mid part of the balloon of a 7f maxi ld 22mm x 4cm percutaneous transluminal angioplasty (pta) dilation catheter ruptured.There was no reported patient injury.Multiple attempts to obtain supplemental information were made; however, additional event details were not provided.One non-sterile unit of a maxi ld 7f 22x4 110cm was received inside of a clear plastic bag.The device was unpacked to proceed with the product evaluation.Per visual analysis, the balloon appears to have been previously inflated.The other components of the unit were inspected, and no anomalies were noted.Functional analysis was completed, an insertion/withdrawal of an appropriate wire through the distal tip and the hub was performed, and the wire passed with no difficulties.Then, an inflator/deflator was connected to the device and a leakage was noted on the balloon of the device.Due the leakage noted during functional analysis, sem analysis was performed.Results showed that the maxi ld balloon surface presented evidence of a punctured condition that may be related to the reported leakage and scratch marks located near the damaged area.This type of damage is commonly caused during the interaction of the material with a sharp object or mechanical damage.It is very likely that the same factors that caused the observed scratch marks on the surface could have led to the damaged condition found on the received device.It seems the material near the damaged area was affected with a sharp object from the outside of the device.No other anomalies were observed during the sem analysis.A product history record (phr) review of lot 82234919 revealed no anomalies or non-conformances during the manufacturing and inspection processes that can be associated with the reported event.The reported ¿balloon burst¿ was not confirmed due to the technical definition of a burst; however, a leakage was confirmed through analysis of the returned device which may appear to the user as a burst.Sem analysis revealed a punctured condition along with a scratch mark on the outer portion of the balloon material.This suggests the balloon material was damaged by the interaction of the balloon with a sharp object such as calcified spicules located on the lesion.Vessel characteristics, although unknown, likely contributed to the reported event as evidenced by device analysis.According to the safety information in the instructions for use ¿note: the rated burst pressure is printed on the package label.In vitro testing has shown that with 95% confidence, 99.9% of the balloons will not burst at or below the rated pressure.Balloons should not be inflated in excess of the rated burst pressure.To reduce the potential for vessel damage, the inflated diameter of the balloon should approximate the diameter of the vessel just proximal and distal to the stenosis.¿ neither the phr nor the information available suggests a design or manufacturing related cause for the reported event.Therefore, no corrective or preventive action will be taken at this time.
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