An investigation was carried out into this complaint.Based on the information received during the resident transfer from the bath the right shoulder clip from the right shoulder part of the sling came apart due to stitches failure and the resident fell on the lift chassis.Review of reportable complaints for maxi move lift showed that there are no similar events related to strap stitching failure in the sling.Therefore, the incident described above seems to be an isolated event to date.It can be established that the lift and the sling, which work together as a system, were being used for patient care when the event took place, and as such it appears the played a role in the event outcome.There is no indications that part of the lift device failed or otherwise contributed in a way that is found significant for this investigation.Therefore, the investigation will focus on the sling accessory.An on site inspection found the sling with removed label and in poor condition "left clip attachments torn.Open seams.Product label is missing!".These failures were confirmed as the sling has been returned to arjohuntleigh for further evaluation.Additionally, the clips of the sling were found to be dated on march 2009.Therefore, the sling is about 7 years old.According to the maxi move instruction for use (ifu) supplied with the lift: - "the expected operational life for fabric slings and fabric stretchers is approximately two years from date of purchase".Therefore this sling was significantly past its lifetime, it should have been discarded and should not have been used, for many years.Within the scope of a manufacturer investigation, we could stop here, as this device clearly was used beyond its intended and labelled lifetime.However, it was decided to provide additional pull tests for the returned sling trying to check condition of the stitches.As both shoulder straps were damaged, the leg straps underwent pull tests to see what force is needed to damage stitches in the sling.Following the results, we were not able to recreate stitches failure as at first the sling fabric started to rip.For both leg straps the weight put on strap was on average about (b)(6) before the fabric started to rip.Stitches at both leg straps were found to be in good condition.No anomalies were found.Please note that the slings have long series of stitching connecting the clip to the main body of the sling.During normal and on label use, without any malfunction, it is highly unlikely that the strap of a sling will ripped from the main body of sling.This is shown by the lack of complaints volume of such issue when compared to the amount of sold devices and in comparison to their daily use.For the sling to have torn at stitches, we strongly believe it to having been damaged before the transfer.Based on the information received, it appears most likely that both shoulder straps stitches had been damaged before the incident occurred and the sling was used in that condition continuously and off label.The maxi move instruction for use (ifu) supplied with the lift contains crucial information: - "it is essential that the slings, slings loops, straps and attachment clips are carefully inspected before each and every use.If the sling, loops or straps are frayed or the clips damaged, the sling must not be used and should be replaced immediately" from the information available and our evaluation conducted we have come to find it most likely that the event was caused by use error : not following the instructions for use section.We find it likely that the stitches at strap ripped due to excessively exceeding its lifetime.Please note that the customer was visited and interviewed by a local arjohuntleigh representative but could not provide any training dates for staff.Therefore, arjohuntleigh suggests to remind the staff involved of the device labelling, with special attention to proper slings inspection before use.This is to be communicated to the customer.
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