MAUDE Adverse Event Report: STRYKER TRAUMA KIEL LONG NAIL KIT R1.5, TI, LEFT GAMMA3® Ø10X320MM X 120°; ROD, FIXATION, INTRAMEDULLARY AND ACCESSORIES

Catalog Number 35200320S

Device Problem Fracture (1260)

Patient Problem Inflammation (1932)

Event Date 12/10/2018

Event Type  Injury  

Manufacturer Narrative

Once the investigation has been completed any additional information will be reported in a supplemental report.

Event Description

On (b)(6) 2016, long gamma nail was implanted as a treatment for trochanter fracture.Partial load was started 1 weeks later after surgery and total load started at 9 weeks.Felt something strange in (b)(6) 2018, visited the hospital on (b)(6) 2018.Fracture of the proximal part of the nail was discovered compared with radiographing.It was replaced on (b)(6) with a replacement of long gamma ((b)(4)).After (b)(4), when she present to doctor at (b)(6) 2018, fracture was confirmed at proximal part of the nail.Therefore, the nail was removed and fixed with no stryker plate to calm the inflammatory response with antibiotics.After that, the bipolar hip arthroplasty is "planed".

Event Description

On 2016/12/16, long gamma nail was implanted as a treatment for trochanter fracture.Partial load was started 1 weeks later after surgery and total load started at 9 weeks.Felt something strange in (b)(6) 2018, visited the hospital on (b)(6) 2018.Fracture of the proximal part of the nail was discovered compared with radiographing.It was replaced on april 20th with a replacement of long gamma.(pi1779413) after pi1779413, when she present to doctor at (b)(6) 2018, fracture was confirmed at proximal part of the nail.Therefore, the nail was removed and fixed with no stryker plate to calm the inflammatory response with antibiotics.After that, the bipolar hip arthroplasty is planed.

Manufacturer Narrative

The reported event that long nail kit r1.5, ti, left gamma3® ø10x320mm x 120° was alleged of issue k-170 (implant breakage - nail) could be confirmed, since the device was returned for evaluation and matched the alleged failure mode.The device inspection revealed the following: the nail was found to be broken in the webs of the proximal lag screw hole.Bearing/ friction marks of lag screw at distal portion / medial portion of the proximal hole of the nail were observed.The breakage surfaces of posterior and anterior web showed signs of fatigue fracture: smooth and shiny, plastic deformation and lines of rest.A review of the device history for the reported lot did not indicate any abnormalities.No corrective actions are required at this time.A review of the labeling did not indicate any abnormalities.No indications of material, manufacturing or design related problems were found during the investigation.The customer reported that the nail was broken after approximately 8 months of implantation.According to an internal literature research the normal femur bone fracture consolidation is done after 8 to 24 weeks.Also, patient is reported to have medical history of osteoporosis and dm.The doctor also considered that the degree of crushing of the previous bone fracture was strong.A not healed bone after 6 months is classified as non-union, means the bone did not heal due to patient conditions.Based on the above observations the nail breakage is not linked to a deficiency of the device but is rather considered patient related (non-union/ delayed healing leading to fatigue fracture of the device).Other listed adverse effects or contraindications like bone stock compromised by prior implantation and osteoporosis did contribute to the nail breakage.The ifu lists non-unions and bone stock compromised by disease, infection or prior implantation as contraindications (conditions presenting an increased risk of failure).The operative technique states clearly that ¿the gamma3 nail is designed for temporary implantation until the bone consolidation occurs.Therefore, if no bone consolidation occurs or if consolidation is not sufficient, the system may fail.¿ general aspects: an intramedullary nail is a temporary implant which inevitably will be subject of a fatigue fracture if the biomechanical stresses on the implant are too high or not considerably reduced during the period of implantation.During this period there is a race between bony consolidation / fracture healing and implant breakage as noted in the labelling of the product.Usually a breakage is contributed by one or more deficits, e.G.Insufficient bone healing, product damage.Generally the risk of a breakage will increase with the increase of load cycles and load level.Nail breakage in general has been experienced, but does not present an unanticipated event in itself.Depending on load application, also, depending on the patient¿s post implant behaviour and depending on suitable anatomical reduction, depending on the kind of bone breakage, depending on the course of bone healing and other factors ¿ e.G.Additional trauma / fall - a nail breakage can rather be classified as anticipated ¿ specifically if one or more contributing issues concurrence with each other.Another prerequisite for a successful supply is undisturbed, normal bone healing.This state must be achieved within a medically recognized period (confirmed by scientific analysis about 6 months) in such way, that the bone strength allows significantly increasing discharge of the time-fixed implant material.In case that such a situation does not occur (insufficient or non-healing of the patient¿s bone after an implantation period of 8 months), exceeding of the fatigue strength is to be expected and thus quite predictable complications.If any further information is provided, the complaint report will be updated.

• Brand Name: LONG NAIL KIT R1.5, TI, LEFT GAMMA3® Ø10X320MM X 120°
• Type of Device: ROD, FIXATION, INTRAMEDULLARY AND ACCESSORIES
• Manufacturer (Section D): STRYKER TRAUMA KIEL; prof. kuentscher-strasse 1-5; schoenkirchen/kiel D-242 32
• MDR Report Key: 8220016
• MDR Text Key: 132203417
• Report Number: 0009610622-2019-00004
• Device Sequence Number: 1
• Product Code: HSB
• UDI-Device Identifier: 04546540375599
• UDI-Public: 04546540375599
• Combination Product (y/n): N
• PMA/PMN Number: K034002
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: health professional
• Type of Report: Initial,Followup
• Report Date: 04/05/2019

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 01/04/2019
• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: No
• Device Operator: Lay User/Patient
• Device Catalogue Number: 35200320S
• Device Lot Number: K0A30E8
• Was Device Available for Evaluation?: Yes
• Date Manufacturer Received: 03/18/2019
• Is This a Reprocessed and Reused Single-Use Device?: No
• Patient Sequence Number: 1
• Patient Outcome(s): Required Intervention
• Patient Age: 70 YR