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| Model Number |
C06150ML |
| Medical Device Problem Code |
Occlusion Within Device (1423)
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| Health Effect - Clinical Code |
Reocclusion (1985)
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| Date of Event |
07/01/2016
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Type of Reportable Event
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Serious Injury
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Additional Manufacturer Narrative
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It was reported that restenosis was confirmed in a patient who had two smart stents and a smart control stent previously placed in the target lesion without any issue.After the restenosis was confirmed, a plain old balloon angioplasty (poba) was performed a month later.The patient recovered.The target lesion was the proximal portion of the left superficial femoral artery.The patient¿s vessel was not calcified and mildly tortuous.The rate of stenosis was 100%.The product remains implanted and is thus not available for analysis. a device history record (dhr) revealed no anomalies or non-conformances during the manufacturing and inspection processes that can be associated with the reported event.Restenosis is a known potential adverse event associated with implanting peripheral artery stents and is often associated with the progression of peripheral artery disease.Although a definitive root cause cannot be determined, clinical status, comorbidities, and pharmacological factors are possible contributing factors for the patient outcome.Based on the available information there is no evidence to suggest that the event was design or manufacturing related therefore no corrective action will be taken.This is one of three products involved with the reported event.
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Event or Problem Description
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It was reported that restenosis was confirmed in a patient who had two smart stents and a smart control stent previously placed in the target lesion without any issue.After the restenosis was confirmed, a plain old balloon angioplasty (poba) was performed a month later.The patient recovered.The target lesion was the proximal portion of the left superficial femoral artery.The patient¿s vessel was not calcified and mildly tortuous.The rate of stenosis was 100%. additional procedural details were requested but are unknown.
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Additional Manufacturer Narrative
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The exact cause could not be determined.Vessel characteristics of mild tortuosity and a rate of stenosis of 100% may have contributed to the reported event.In addition peripheral revascularization is necessary to reopen an in-stent restenosis caused by neointimal hyperplasia and the ongoing disease process.Neointimal hyperplasia refers to proliferation and migration of vascular smooth muscle cells primarily in the tunica intima, resulting in the thickening of arterial walls and decreased arterial lumen space.Neointimal hyperplasia is the major cause of restenosis after percutaneous interventions such as stenting or angioplasty.The term neointima is used because the cells in the hyperplastic regions of the vascular wall have histological characteristics of both intima and normal artery cells.Neointimal hyperplasia first develops with damage to the arterial wall, followed by platelet aggregation at site of injury, recruitment of inflammatory cells, proliferation and migration of vascular smooth muscle cells, and collagen deposition.Mechanical injury of arteries due to stretching of arterial walls with a balloon catheter results in the recruitment of cells such as monocytes, macrophages, and neutrophils to the site of injury.Macrophages in particular express many growth factors, cytokines, and enzymes that facilitate vascular smooth muscle cell migration and proliferation.Neither the dhr nor the information available suggests a design or manufacturing related cause for the reported event; therefore, no corrective/preventive action will be taken.This is one of three reports (9616099-2016-00745, 9616099-2016-00747 and 9616099-2016-00748).
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Additional Manufacturer Narrative
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Additional information received indicates the pre-revascularization rutheford classification of the left leg was iii.Corrected data: complaint conclusion: it was reported that restenosis was confirmed in a patient who had two smart stents and a smart control stent previously placed in the target lesion without any issue.After the restenosis was confirmed, a plain old balloon angioplasty (poba) was performed a month later.The pre-revascularization rutheford classification of the left leg was iii.The patient recovered.The target lesion was the proximal portion of the left superficial femoral artery.The patient¿s vessel was not calcified and mildly tortuous.The rate of stenosis was 100%.The product remains implanted and is thus not available for analysis. the products were not returned for analysis.A device history record (dhr) review of lots 15851087 and 15615287 revealed no anomalies or non-conformances during the manufacturing and inspection processes that can be associated with the reported event.In-stent restenosis (isr) is associated with the progression of atherosclerotic disease and is a known potential adverse event following stent implantation and does not represent a device failure.Intra-arterial stent placement is a treatment of the disease process, it is not a preventive or cure for the progression of symptoms of atherosclerotic artery disease.Vessel occlusion, restenosis, intimal hyperplasia or recurrent strictures are well known documented potential complications of this type of procedure and are listed in the ifu as such.Peripheral revascularization is necessary to reopen an in-stent restenosis caused by neointimal hyperplasia and the ongoing disease process.Neointimal hyperplasia refers to proliferation and migration of vascular smooth muscle cells primarily in the tunica intima, resulting in the thickening of arterial walls and decreased arterial lumen space.Neointimal hyperplasia is the major cause of restenosis after percutaneous interventions such as stenting or angioplasty.The term neointima is used because the cells in the hyperplastic regions of the vascular wall have histological characteristics of both intima and normal artery cells.Neointimal hyperplasia first develops with damage to the arterial wall, followed by platelet aggregation at site of injury, recruitment of inflammatory cells, proliferation and migration of vascular smooth muscle cells, and collagen deposition.Mechanical injury of arteries due to stretching of arterial walls with a balloon catheter results in the recruitment of cells such as monocytes, macrophages, and neutrophils to the site of injury.Macrophages in particular express many growth factors, cytokines, and enzymes that facilitate vascular smooth muscle cell migration and proliferation.Neither the dhr nor the information available suggests a design or manufacturing related cause for the reported event; therefore, no corrective/preventive action will be taken at this time.This is one of three reports related to the reported event and the associated manufacturer report numbers are (9616099-2016-00745, 9616099-2016-00747 and 9616099-2016-00748).
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Search Alerts/Recalls
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