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Device evaluation: the hmbl-4-tri device of lot number c1639034 involved in this complaint was not returned for evaluation.With the information provided, a document based investigation was conducted also returned were 15x c1639034 which were returned unused, 2 x c1634508 which were returned unused, 15 x c1640400 which were returned unused, 5 x c1667117 which were unused.It was noted during preparation of the devices for decontamination that some of the returned stock had compromised security seals.Additional files were opened to investigate the lifted security seal as follows on the unused stock ((b)(4).An investigation was conducted into the unsticking of silver seal tape on the clamshell, as the silver seals would indicate the packaging is unopened to the user.If the user was to receive the devices with both security seal open, the user does not know it the devices were unused.As the returned unwanted stock had both seals unstuck, an investigation was opened to determine what caused the seals to be open when the user indicated they did not open the devices.Additional files were opened to investigate two damaged anoscopes, (b)(4) which were observed to be broken.Documents review including ifu review: prior to distribution hmbl-4-tri devices are subjected to a visual inspection and functional checks to ensure device integrity.These inspections and functional checks are outlined in internal procedures in place at cirl.A review of the manufacturing records for hmbl-4-tri of lot number c1639034 did not reveal any discrepancies that could have contributed to this complaint issue.The review of relevant manufacturing records, confirms the failure mode has not previously occurred with the current lot number.Based on the information available to date, there is no evidence to suggest that there are any manufacturing issues associated with lot number c1639034.As per the instructions for use, ifu0030-7, users are advised of the following: "if the package is opened or damaged when received, do not use.Visually inspect with particular attention to joints, cracks or breaks.If an abnormality is detected that would prohibit proper working condition, do not use.¿ the ifu states that ¿ maintain suction of haemorrhoid by keeping suction port covered.Deploy band by slowly rotating suction spool downwards until tension is released.¿ ¿uncover suction port of ligator to relieve suction on haemorrhoid.This will allow ligated haemorrhoid to be released from tip of device.¿ there is no evidence to suggest that the customer did not follow the instructions for use.Root cause (possible): a definitive root cause could not be determined from the available information.A possible root cause could be attributed to user technique; if suction was not released or too much tissue was sucked into the tip of the device, this may have caused the bands to slip off the haemorrhoid as the tissue may not have bulged around the band holding the bands in place, or if the user did not begin at the most proximal location from the anal sphincter and proceed distally resulting in passing the shortshot over a previously placed band this may dislodge the band.Summary: customer complaint is confirmed based on customer testimony.According to the information reported, the patient did not experience any adverse effects due to this occurrence.Complaints of this nature will continue to be monitored for emerging trends.
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