International 1 part 3.2% Na Test plasma within 4 hours of Routine - 2 hr Therapeutic Range as per normalised ratio Citrate collection. Urgent BSCH guidelines. –30mins (Adult only for 9 parts blood ISI is derived from Target ranges available manufacturer’s patients on warfarin instructions. corresponding to clinical (INR) Interference: Heparin>2 U/dl conditions Haemolysed Specimens should not be processed. Volume of blood to anticoagulant critical. Prothrombin Time 1 part 3.2% Na Test within 4 hours of specimen Routine - 2 hr Adults: 9.6-12.3s (PT) Citrate collection. Notify lab if patient is on Babies (Term****): 9 part blood anticoagulant therapy. Urgent Day 1: -11.6-14.4-sec –30mins Adult vol.= 3mls Interferences: Haemolysed samples, Day 5: -10.9-13.9 sec Baby vol = 1.3ml Lipaemic samples Day 30:-10.6-13sec Day 90:-11.5-13.1 sec Lupus Anticoagulant 1 part 3.2% Na Complete Thrombophilia request form (LA) Citrate 4-6 weeks (Batched) Reported as Positive or IUD bloods for lupus must be sent at Adult Only 9 part blood negative. least 8 weeks post IUD. Adult vol.= 6 ml Send sample as soon as possible, within (2 x 3 mls) Positives must be confirmed one hour to allow processing and freezing by repeat testing at least 12 within 4 hours. Do not send to lab after weeks apart to confirm 15.30pm positively. Stored frozen at –80C
International normalised ratio (Adult only for patients on warfarin (INR) 1 part 3.2% Na Citrate 9 parts blood Test plasma within 4 hours of collection. ISI is derived from manufacturer’s instructions. Interference: Heparin>2 U/dl Haemolysed Specimens should not be processed. Volume of blood to anticoagulant critical. Routine - 2 hr Urgent –30mins Therapeutic Range as per BSCH guidelines. Target ranges available corresponding to clinical conditions Prothrombin Time (PT) 1 part 3.2% Na Citrate 9 part blood Adult vol.= 3mls Baby vol = 1.3ml Test within 4 hours of specimen collection. Notify lab if patient is on anticoagulant therapy. Interferences: Haemolysed samples, Lipaemic samples Routine - 2 hr Urgent –30mins Adults: 9.6-12.3s Babies (Term****): Day 1: -11.6-14.4-sec Day 5: -10.9-13.9 sec Day 30:-10.6-13sec Day 90:-11.5-13.1 sec Lupus Anticoagulant (LA) Adult Only 1 part 3.2% Na Citrate 9 part blood Adult vol.= 6 ml (2 x 3 mls) Complete Thrombophilia request form IUD bloods for lupus must be sent at least 8 weeks post IUD. Send sample as soon as possible, within one hour to allow processing and freezing within 4 hours. Do not send to lab after 15.30pm Stored frozen at –80C 4-6 weeks (Batched) Reported as Positive or negative. Positives must be confirmed by repeat testing at least 12 weeks apart to confirm positively.
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