Pharmacist-led anticoagulation monitoring can significantly improve the effectiveness and safety of warfarin for patients during hospitalization / 南方医科大学学报

OBJECTIVE@#To investigate the role of pharmacist-led anticoagulation monitoring service for warfarin anticoagulation therapy in patients during hospitalization.@*METHODS@#We retrospectively analyzed the data of 421 patients receiving warfarin anticoagulation therapy during hospitalization between April, 2016 and December, 2017. Of these patients, 316 received daily pharmacist-led anticoagulation monitoring service including checking the patients' International Normalized Ratio (INR) and other pertinent laboratory test results and reviewing medication changes and the patients' clinical status (monitoring group); the other 105 patients receiving warfarin anticoagulation therapy without pharmaceutical care served as the control group. The data including compliance rate of anticoagulant indicators, incidence and rate of prompt management of INR alert, thrombosis and bleeding events during hospitalization were analyzed among these patients.@*RESULTS@#Compared with the control patients, the patients in the monitoring group showed a significantly higher percentage time within target INR range [(73.20±9.46)% (46.32±17.11)%, < 0.001] and a higher qualified rate of INR before discharge (98.42% 60.95%, < 0.001) as well as a higher proper INR-monitoring frequency (97.15% 66.67%, < 0.001). The patients in the monitoring group showed a significantly lower incidence of INR alert than the control patients (8.23% 20.00%, < 0.001) with also a much higher rate of prompt management (96.15% 33.33%). The two groups had similar incidences of clinical events except that the control group reported a higher incidence of minor bleeding episodes (9.52% 2.53%, =0.005).@*CONCLUSIONS@#Pharmacist-led anticoagulation monitoring service can significantly improve the effectiveness and safety of warfarin anticoagulation therapy for patients during hospitalization.

Performance verification of diluted thrombin time assay for detecting Dabigatran level in plasma / 临床检验杂志

Objective To evaluate the performance of diluted thrombin time (dTT) assay for detecting Dabigatran levels and observe whether this assay may meet the requirements of clinical laboratory.Methods According to EP15-A2,EP6-A,EP7-A and C-24 documents of the Clinical and Laboratory Standards Institute (CLSI),the precision,trueness,analytical measurement range,carryover rate and anti-biological interference of dTT assay were evaluated and the stability of specimen for dTT assay was observed.Results Both the within-day and between-day coefficient of variation (CV) of dTT assay for detecting Dabigatran levels were consistent with manufacturer's stated CV.Compared with target values of Dabigatran,the relative bias of 3 levels of proficiency test materials from College of American Pathologists (CAP) were less than 10％.The results meet linear verification when Dabigatran concentration was between 30.92 and 249.13 ng/mL.The carryover rate was-0.84％.There was no interference for Dabigatran levels by dTT assay for detecting Dabigatran when Hb≤3 g/L,triglyceride≤873 mg/dL,heparin≤2.2 IU/mL and FDP≤29 mg/L.The results of stability showed that plasma specimens for dTT could not be stored at room temperature more than 4 hours,at 4 ℃ more than 4 days,at-20 ℃ exceed 1 month,while at-80℃ the plasma specimens could be stored at least 6 months for dTT assay.Conclusion The precision,trueness,analytical measurement range,carryover rate,anti-biological interference of dTT assay may meet the requirement of clinical laboratory.The stability of the specimen can fulfill the clinical requirements.

Application of thrombus precursor protein and plasma D-dimer in anticoagulation monitoring after mechanical heart valve replacement / 临床外科杂志

Objective To explore the values and relationship among the contents of thrombus precursor protein(TpP)and plasma D-dimer(D-D),complications after mechanical heart valve replace-ment and their correlation with international normalized ratio(INR)in anticoagulation therapy and monito-ring.Methods A total of 150 patients with mechanical heart valve replacement were enrolled.TpP,D-D, INR,other indicators and complications were compared to draw conclusions.Results There were signifi-cant differences in TpP among the groups(P<0.0083).Significant differences in D-D among the postop-erative group(100.96 ±61.56),thrombosis group(17.78 ±5.94)and control group(5.97 ±1.58)were observed(P<0.0083).Significant differences in INR among the postoperative group(1.65 ±0.34),hem-orrhage group(2.22 ±0.65)and control group(1.11 ±0.10)were observed(P<0.0083),but the effec-tiveness of INR monitoring for determining the state of thrombosis was limited to a certain extent.Conclu-sion TpP and D-D examination can facilitate monitoring after mechanical heart valve replacement,and it has a certain guiding significance for determining anticoagulation therapy and monitoring of complications after mechanical heart valve replacement.