The measurement of activity contained in a 32P stainless-steel stent by destructive assay.
Destructive assays of stainless-steel stents containing 32P were performed. Prior to assay, 24 stents were intercompared on a NaI(Tl) well-type crystal. A subset of stents were then digested in a suitable carrier solution by the addition of concentrated hydrofluoric acid. The final solution was measured by the CIEMAT/NIST tritium efficiency tracing method for liquid scintillation counting. A separate experiment was performed which indicated no loss of activity during stent digestion. Expanded (k = 2) uncertainties on stent activity ranged from 1.0% to 2.6%.
Cessna
Jeffrey T
JT
Physics Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899-8462, USA. jcessna@nist.gov
D015906:Angioplasty, Balloon, Coronary; D023903:Coronary Restenosis / Q000517:prevention & control; D006801:Humans; D006858:Hydrofluoric Acid; D010761:Phosphorus Radioisotopes / Q000032:analysis* / Q000627:therapeutic use*; D012015:Reference Standards; D012588:Scintillation Counting; D013193:Stainless Steel; D015607:Stents; D013679:Technology, Radiologic; D014481:United States
D010761:Phosphorus Radioisotopes; D013193:Stainless Steel; D006858:Hydrofluoric Acid