Toward development of a point-of-care assay of enoxaparin anticoagulant activity in whole blood
Abstract There is need for a rapid assay to determine the efficacy of low-molecular-weight-heparin (LMWH) in whole blood. Heparinase was used to eliminate, and thereby quantify, the anticoagulant activity of the low-molecular-weight-heparin, enoxaparin. The percent change in the clotting time of who...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Inchiosa, Mario A. [verfasserIn] Pothula, Suryanarayana [verfasserIn] Kubal, Keshar [verfasserIn] Sanchala, Vajubhai T. [verfasserIn] Navarro, Iris [verfasserIn] |
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| Format: |
E-Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
2011 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Journal of thrombosis and thrombolysis - Dordrecht [u.a.] : Springer Science + Business Media B.V, 1994, 32(2011), 1 vom: 07. Jan., Seite 47-53 |
|---|---|
| Übergeordnetes Werk: |
volume:32 ; year:2011 ; number:1 ; day:07 ; month:01 ; pages:47-53 |
| Links: |
|---|
| DOI / URN: |
10.1007/s11239-010-0546-5 |
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| Katalog-ID: |
SPR018014291 |
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| 520 | |a Abstract There is need for a rapid assay to determine the efficacy of low-molecular-weight-heparin (LMWH) in whole blood. Heparinase was used to eliminate, and thereby quantify, the anticoagulant activity of the low-molecular-weight-heparin, enoxaparin. The percent change in the clotting time of whole blood in the presence of heparinase yielded the anticoagulant contribution of enoxaparin. A minimally activated assay (MAA) of whole blood clotting time was evaluated for the detection and relative quantification of enoxaparin. The assay cartridge consisted of a plain glass tube and detection magnet, with no additional sources of activation. Comparisons were also made with a point-of-care, activated partial thromboplastin time (aPTT) assay. Plasma or whole blood was spiked with enoxaparin at concentrations ranging from 0.1 to 1.0 anti-factor Xa IU/ml. A commercial preparation of heparinase I was used to digest enoxaparin, and clotting times were determined with and without heparinase incubation. Heparinase digestion caused an average shortening of clotting time of 21.1% (47.3 s) in blood spiked with 0.4 anti-Xa IU/ml enoxaparin, an amount expected in the therapeutic range; also, 0.1 anti-Xa IU/ml of enoxaparin could be reliably detected. The assay performed comparably when transferred to a point-of-care setting with heparinase being added directly to citrated blood collection tubes, followed by either MAA or aPTT assay. Strong correlations were obtained with both assays between the percent change in clotting time (after heparinase) and the added concentration of enoxaparin, or in comparison with the chromogenically measured concentration of enoxaparin. The assays for an individual blood sample can be completed within 10 min. | ||
| 650 | 4 | |a Low-molecular-weight-heparin |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Low-molecular-weight-heparin assay |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a LMWH point-of-care assay |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Anti-factor Xa activity |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Pothula, Suryanarayana |e verfasserin |4 aut | |
| 700 | 1 | |a Kubal, Keshar |e verfasserin |4 aut | |
| 700 | 1 | |a Sanchala, Vajubhai T. |e verfasserin |4 aut | |
| 700 | 1 | |a Navarro, Iris |e verfasserin |4 aut | |
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10.1007/s11239-010-0546-5 doi (DE-627)SPR018014291 (SPR)s11239-010-0546-5-e DE-627 ger DE-627 rakwb eng 610 ASE 44.85 bkl Inchiosa, Mario A. verfasserin aut Toward development of a point-of-care assay of enoxaparin anticoagulant activity in whole blood 2011 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract There is need for a rapid assay to determine the efficacy of low-molecular-weight-heparin (LMWH) in whole blood. Heparinase was used to eliminate, and thereby quantify, the anticoagulant activity of the low-molecular-weight-heparin, enoxaparin. The percent change in the clotting time of whole blood in the presence of heparinase yielded the anticoagulant contribution of enoxaparin. A minimally activated assay (MAA) of whole blood clotting time was evaluated for the detection and relative quantification of enoxaparin. The assay cartridge consisted of a plain glass tube and detection magnet, with no additional sources of activation. Comparisons were also made with a point-of-care, activated partial thromboplastin time (aPTT) assay. Plasma or whole blood was spiked with enoxaparin at concentrations ranging from 0.1 to 1.0 anti-factor Xa IU/ml. A commercial preparation of heparinase I was used to digest enoxaparin, and clotting times were determined with and without heparinase incubation. Heparinase digestion caused an average shortening of clotting time of 21.1% (47.3 s) in blood spiked with 0.4 anti-Xa IU/ml enoxaparin, an amount expected in the therapeutic range; also, 0.1 anti-Xa IU/ml of enoxaparin could be reliably detected. The assay performed comparably when transferred to a point-of-care setting with heparinase being added directly to citrated blood collection tubes, followed by either MAA or aPTT assay. Strong correlations were obtained with both assays between the percent change in clotting time (after heparinase) and the added concentration of enoxaparin, or in comparison with the chromogenically measured concentration of enoxaparin. The assays for an individual blood sample can be completed within 10 min. Low-molecular-weight-heparin (dpeaa)DE-He213 Low-molecular-weight-heparin assay (dpeaa)DE-He213 LMWH point-of-care assay (dpeaa)DE-He213 Anti-factor Xa activity (dpeaa)DE-He213 Pothula, Suryanarayana verfasserin aut Kubal, Keshar verfasserin aut Sanchala, Vajubhai T. verfasserin aut Navarro, Iris verfasserin aut Enthalten in Journal of thrombosis and thrombolysis Dordrecht [u.a.] : Springer Science + Business Media B.V, 1994 32(2011), 1 vom: 07. Jan., Seite 47-53 (DE-627)320578445 (DE-600)2017305-2 1573-742X nnns volume:32 year:2011 number:1 day:07 month:01 pages:47-53 https://dx.doi.org/10.1007/s11239-010-0546-5 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_711 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 44.85 ASE AR 32 2011 1 07 01 47-53 |
| spelling |
10.1007/s11239-010-0546-5 doi (DE-627)SPR018014291 (SPR)s11239-010-0546-5-e DE-627 ger DE-627 rakwb eng 610 ASE 44.85 bkl Inchiosa, Mario A. verfasserin aut Toward development of a point-of-care assay of enoxaparin anticoagulant activity in whole blood 2011 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract There is need for a rapid assay to determine the efficacy of low-molecular-weight-heparin (LMWH) in whole blood. Heparinase was used to eliminate, and thereby quantify, the anticoagulant activity of the low-molecular-weight-heparin, enoxaparin. The percent change in the clotting time of whole blood in the presence of heparinase yielded the anticoagulant contribution of enoxaparin. A minimally activated assay (MAA) of whole blood clotting time was evaluated for the detection and relative quantification of enoxaparin. The assay cartridge consisted of a plain glass tube and detection magnet, with no additional sources of activation. Comparisons were also made with a point-of-care, activated partial thromboplastin time (aPTT) assay. Plasma or whole blood was spiked with enoxaparin at concentrations ranging from 0.1 to 1.0 anti-factor Xa IU/ml. A commercial preparation of heparinase I was used to digest enoxaparin, and clotting times were determined with and without heparinase incubation. Heparinase digestion caused an average shortening of clotting time of 21.1% (47.3 s) in blood spiked with 0.4 anti-Xa IU/ml enoxaparin, an amount expected in the therapeutic range; also, 0.1 anti-Xa IU/ml of enoxaparin could be reliably detected. The assay performed comparably when transferred to a point-of-care setting with heparinase being added directly to citrated blood collection tubes, followed by either MAA or aPTT assay. Strong correlations were obtained with both assays between the percent change in clotting time (after heparinase) and the added concentration of enoxaparin, or in comparison with the chromogenically measured concentration of enoxaparin. The assays for an individual blood sample can be completed within 10 min. Low-molecular-weight-heparin (dpeaa)DE-He213 Low-molecular-weight-heparin assay (dpeaa)DE-He213 LMWH point-of-care assay (dpeaa)DE-He213 Anti-factor Xa activity (dpeaa)DE-He213 Pothula, Suryanarayana verfasserin aut Kubal, Keshar verfasserin aut Sanchala, Vajubhai T. verfasserin aut Navarro, Iris verfasserin aut Enthalten in Journal of thrombosis and thrombolysis Dordrecht [u.a.] : Springer Science + Business Media B.V, 1994 32(2011), 1 vom: 07. Jan., Seite 47-53 (DE-627)320578445 (DE-600)2017305-2 1573-742X nnns volume:32 year:2011 number:1 day:07 month:01 pages:47-53 https://dx.doi.org/10.1007/s11239-010-0546-5 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_711 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 44.85 ASE AR 32 2011 1 07 01 47-53 |
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10.1007/s11239-010-0546-5 doi (DE-627)SPR018014291 (SPR)s11239-010-0546-5-e DE-627 ger DE-627 rakwb eng 610 ASE 44.85 bkl Inchiosa, Mario A. verfasserin aut Toward development of a point-of-care assay of enoxaparin anticoagulant activity in whole blood 2011 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract There is need for a rapid assay to determine the efficacy of low-molecular-weight-heparin (LMWH) in whole blood. Heparinase was used to eliminate, and thereby quantify, the anticoagulant activity of the low-molecular-weight-heparin, enoxaparin. The percent change in the clotting time of whole blood in the presence of heparinase yielded the anticoagulant contribution of enoxaparin. A minimally activated assay (MAA) of whole blood clotting time was evaluated for the detection and relative quantification of enoxaparin. The assay cartridge consisted of a plain glass tube and detection magnet, with no additional sources of activation. Comparisons were also made with a point-of-care, activated partial thromboplastin time (aPTT) assay. Plasma or whole blood was spiked with enoxaparin at concentrations ranging from 0.1 to 1.0 anti-factor Xa IU/ml. A commercial preparation of heparinase I was used to digest enoxaparin, and clotting times were determined with and without heparinase incubation. Heparinase digestion caused an average shortening of clotting time of 21.1% (47.3 s) in blood spiked with 0.4 anti-Xa IU/ml enoxaparin, an amount expected in the therapeutic range; also, 0.1 anti-Xa IU/ml of enoxaparin could be reliably detected. The assay performed comparably when transferred to a point-of-care setting with heparinase being added directly to citrated blood collection tubes, followed by either MAA or aPTT assay. Strong correlations were obtained with both assays between the percent change in clotting time (after heparinase) and the added concentration of enoxaparin, or in comparison with the chromogenically measured concentration of enoxaparin. The assays for an individual blood sample can be completed within 10 min. Low-molecular-weight-heparin (dpeaa)DE-He213 Low-molecular-weight-heparin assay (dpeaa)DE-He213 LMWH point-of-care assay (dpeaa)DE-He213 Anti-factor Xa activity (dpeaa)DE-He213 Pothula, Suryanarayana verfasserin aut Kubal, Keshar verfasserin aut Sanchala, Vajubhai T. verfasserin aut Navarro, Iris verfasserin aut Enthalten in Journal of thrombosis and thrombolysis Dordrecht [u.a.] : Springer Science + Business Media B.V, 1994 32(2011), 1 vom: 07. Jan., Seite 47-53 (DE-627)320578445 (DE-600)2017305-2 1573-742X nnns volume:32 year:2011 number:1 day:07 month:01 pages:47-53 https://dx.doi.org/10.1007/s11239-010-0546-5 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_711 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 44.85 ASE AR 32 2011 1 07 01 47-53 |
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10.1007/s11239-010-0546-5 doi (DE-627)SPR018014291 (SPR)s11239-010-0546-5-e DE-627 ger DE-627 rakwb eng 610 ASE 44.85 bkl Inchiosa, Mario A. verfasserin aut Toward development of a point-of-care assay of enoxaparin anticoagulant activity in whole blood 2011 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract There is need for a rapid assay to determine the efficacy of low-molecular-weight-heparin (LMWH) in whole blood. Heparinase was used to eliminate, and thereby quantify, the anticoagulant activity of the low-molecular-weight-heparin, enoxaparin. The percent change in the clotting time of whole blood in the presence of heparinase yielded the anticoagulant contribution of enoxaparin. A minimally activated assay (MAA) of whole blood clotting time was evaluated for the detection and relative quantification of enoxaparin. The assay cartridge consisted of a plain glass tube and detection magnet, with no additional sources of activation. Comparisons were also made with a point-of-care, activated partial thromboplastin time (aPTT) assay. Plasma or whole blood was spiked with enoxaparin at concentrations ranging from 0.1 to 1.0 anti-factor Xa IU/ml. A commercial preparation of heparinase I was used to digest enoxaparin, and clotting times were determined with and without heparinase incubation. Heparinase digestion caused an average shortening of clotting time of 21.1% (47.3 s) in blood spiked with 0.4 anti-Xa IU/ml enoxaparin, an amount expected in the therapeutic range; also, 0.1 anti-Xa IU/ml of enoxaparin could be reliably detected. The assay performed comparably when transferred to a point-of-care setting with heparinase being added directly to citrated blood collection tubes, followed by either MAA or aPTT assay. Strong correlations were obtained with both assays between the percent change in clotting time (after heparinase) and the added concentration of enoxaparin, or in comparison with the chromogenically measured concentration of enoxaparin. The assays for an individual blood sample can be completed within 10 min. Low-molecular-weight-heparin (dpeaa)DE-He213 Low-molecular-weight-heparin assay (dpeaa)DE-He213 LMWH point-of-care assay (dpeaa)DE-He213 Anti-factor Xa activity (dpeaa)DE-He213 Pothula, Suryanarayana verfasserin aut Kubal, Keshar verfasserin aut Sanchala, Vajubhai T. verfasserin aut Navarro, Iris verfasserin aut Enthalten in Journal of thrombosis and thrombolysis Dordrecht [u.a.] : Springer Science + Business Media B.V, 1994 32(2011), 1 vom: 07. Jan., Seite 47-53 (DE-627)320578445 (DE-600)2017305-2 1573-742X nnns volume:32 year:2011 number:1 day:07 month:01 pages:47-53 https://dx.doi.org/10.1007/s11239-010-0546-5 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_711 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 44.85 ASE AR 32 2011 1 07 01 47-53 |
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10.1007/s11239-010-0546-5 doi (DE-627)SPR018014291 (SPR)s11239-010-0546-5-e DE-627 ger DE-627 rakwb eng 610 ASE 44.85 bkl Inchiosa, Mario A. verfasserin aut Toward development of a point-of-care assay of enoxaparin anticoagulant activity in whole blood 2011 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract There is need for a rapid assay to determine the efficacy of low-molecular-weight-heparin (LMWH) in whole blood. Heparinase was used to eliminate, and thereby quantify, the anticoagulant activity of the low-molecular-weight-heparin, enoxaparin. The percent change in the clotting time of whole blood in the presence of heparinase yielded the anticoagulant contribution of enoxaparin. A minimally activated assay (MAA) of whole blood clotting time was evaluated for the detection and relative quantification of enoxaparin. The assay cartridge consisted of a plain glass tube and detection magnet, with no additional sources of activation. Comparisons were also made with a point-of-care, activated partial thromboplastin time (aPTT) assay. Plasma or whole blood was spiked with enoxaparin at concentrations ranging from 0.1 to 1.0 anti-factor Xa IU/ml. A commercial preparation of heparinase I was used to digest enoxaparin, and clotting times were determined with and without heparinase incubation. Heparinase digestion caused an average shortening of clotting time of 21.1% (47.3 s) in blood spiked with 0.4 anti-Xa IU/ml enoxaparin, an amount expected in the therapeutic range; also, 0.1 anti-Xa IU/ml of enoxaparin could be reliably detected. The assay performed comparably when transferred to a point-of-care setting with heparinase being added directly to citrated blood collection tubes, followed by either MAA or aPTT assay. Strong correlations were obtained with both assays between the percent change in clotting time (after heparinase) and the added concentration of enoxaparin, or in comparison with the chromogenically measured concentration of enoxaparin. The assays for an individual blood sample can be completed within 10 min. Low-molecular-weight-heparin (dpeaa)DE-He213 Low-molecular-weight-heparin assay (dpeaa)DE-He213 LMWH point-of-care assay (dpeaa)DE-He213 Anti-factor Xa activity (dpeaa)DE-He213 Pothula, Suryanarayana verfasserin aut Kubal, Keshar verfasserin aut Sanchala, Vajubhai T. verfasserin aut Navarro, Iris verfasserin aut Enthalten in Journal of thrombosis and thrombolysis Dordrecht [u.a.] : Springer Science + Business Media B.V, 1994 32(2011), 1 vom: 07. Jan., Seite 47-53 (DE-627)320578445 (DE-600)2017305-2 1573-742X nnns volume:32 year:2011 number:1 day:07 month:01 pages:47-53 https://dx.doi.org/10.1007/s11239-010-0546-5 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_711 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 44.85 ASE AR 32 2011 1 07 01 47-53 |
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Enthalten in Journal of thrombosis and thrombolysis 32(2011), 1 vom: 07. Jan., Seite 47-53 volume:32 year:2011 number:1 day:07 month:01 pages:47-53 |
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Inchiosa, Mario A. @@aut@@ Pothula, Suryanarayana @@aut@@ Kubal, Keshar @@aut@@ Sanchala, Vajubhai T. @@aut@@ Navarro, Iris @@aut@@ |
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Heparinase was used to eliminate, and thereby quantify, the anticoagulant activity of the low-molecular-weight-heparin, enoxaparin. The percent change in the clotting time of whole blood in the presence of heparinase yielded the anticoagulant contribution of enoxaparin. A minimally activated assay (MAA) of whole blood clotting time was evaluated for the detection and relative quantification of enoxaparin. The assay cartridge consisted of a plain glass tube and detection magnet, with no additional sources of activation. Comparisons were also made with a point-of-care, activated partial thromboplastin time (aPTT) assay. Plasma or whole blood was spiked with enoxaparin at concentrations ranging from 0.1 to 1.0 anti-factor Xa IU/ml. A commercial preparation of heparinase I was used to digest enoxaparin, and clotting times were determined with and without heparinase incubation. Heparinase digestion caused an average shortening of clotting time of 21.1% (47.3 s) in blood spiked with 0.4 anti-Xa IU/ml enoxaparin, an amount expected in the therapeutic range; also, 0.1 anti-Xa IU/ml of enoxaparin could be reliably detected. The assay performed comparably when transferred to a point-of-care setting with heparinase being added directly to citrated blood collection tubes, followed by either MAA or aPTT assay. Strong correlations were obtained with both assays between the percent change in clotting time (after heparinase) and the added concentration of enoxaparin, or in comparison with the chromogenically measured concentration of enoxaparin. 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Inchiosa, Mario A. |
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Inchiosa, Mario A. ddc 610 bkl 44.85 misc Low-molecular-weight-heparin misc Low-molecular-weight-heparin assay misc LMWH point-of-care assay misc Anti-factor Xa activity Toward development of a point-of-care assay of enoxaparin anticoagulant activity in whole blood |
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610 ASE 44.85 bkl Toward development of a point-of-care assay of enoxaparin anticoagulant activity in whole blood Low-molecular-weight-heparin (dpeaa)DE-He213 Low-molecular-weight-heparin assay (dpeaa)DE-He213 LMWH point-of-care assay (dpeaa)DE-He213 Anti-factor Xa activity (dpeaa)DE-He213 |
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Inchiosa, Mario A. |
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toward development of a point-of-care assay of enoxaparin anticoagulant activity in whole blood |
| title_auth |
Toward development of a point-of-care assay of enoxaparin anticoagulant activity in whole blood |
| abstract |
Abstract There is need for a rapid assay to determine the efficacy of low-molecular-weight-heparin (LMWH) in whole blood. Heparinase was used to eliminate, and thereby quantify, the anticoagulant activity of the low-molecular-weight-heparin, enoxaparin. The percent change in the clotting time of whole blood in the presence of heparinase yielded the anticoagulant contribution of enoxaparin. A minimally activated assay (MAA) of whole blood clotting time was evaluated for the detection and relative quantification of enoxaparin. The assay cartridge consisted of a plain glass tube and detection magnet, with no additional sources of activation. Comparisons were also made with a point-of-care, activated partial thromboplastin time (aPTT) assay. Plasma or whole blood was spiked with enoxaparin at concentrations ranging from 0.1 to 1.0 anti-factor Xa IU/ml. A commercial preparation of heparinase I was used to digest enoxaparin, and clotting times were determined with and without heparinase incubation. Heparinase digestion caused an average shortening of clotting time of 21.1% (47.3 s) in blood spiked with 0.4 anti-Xa IU/ml enoxaparin, an amount expected in the therapeutic range; also, 0.1 anti-Xa IU/ml of enoxaparin could be reliably detected. The assay performed comparably when transferred to a point-of-care setting with heparinase being added directly to citrated blood collection tubes, followed by either MAA or aPTT assay. Strong correlations were obtained with both assays between the percent change in clotting time (after heparinase) and the added concentration of enoxaparin, or in comparison with the chromogenically measured concentration of enoxaparin. The assays for an individual blood sample can be completed within 10 min. |
| abstractGer |
Abstract There is need for a rapid assay to determine the efficacy of low-molecular-weight-heparin (LMWH) in whole blood. Heparinase was used to eliminate, and thereby quantify, the anticoagulant activity of the low-molecular-weight-heparin, enoxaparin. The percent change in the clotting time of whole blood in the presence of heparinase yielded the anticoagulant contribution of enoxaparin. A minimally activated assay (MAA) of whole blood clotting time was evaluated for the detection and relative quantification of enoxaparin. The assay cartridge consisted of a plain glass tube and detection magnet, with no additional sources of activation. Comparisons were also made with a point-of-care, activated partial thromboplastin time (aPTT) assay. Plasma or whole blood was spiked with enoxaparin at concentrations ranging from 0.1 to 1.0 anti-factor Xa IU/ml. A commercial preparation of heparinase I was used to digest enoxaparin, and clotting times were determined with and without heparinase incubation. Heparinase digestion caused an average shortening of clotting time of 21.1% (47.3 s) in blood spiked with 0.4 anti-Xa IU/ml enoxaparin, an amount expected in the therapeutic range; also, 0.1 anti-Xa IU/ml of enoxaparin could be reliably detected. The assay performed comparably when transferred to a point-of-care setting with heparinase being added directly to citrated blood collection tubes, followed by either MAA or aPTT assay. Strong correlations were obtained with both assays between the percent change in clotting time (after heparinase) and the added concentration of enoxaparin, or in comparison with the chromogenically measured concentration of enoxaparin. The assays for an individual blood sample can be completed within 10 min. |
| abstract_unstemmed |
Abstract There is need for a rapid assay to determine the efficacy of low-molecular-weight-heparin (LMWH) in whole blood. Heparinase was used to eliminate, and thereby quantify, the anticoagulant activity of the low-molecular-weight-heparin, enoxaparin. The percent change in the clotting time of whole blood in the presence of heparinase yielded the anticoagulant contribution of enoxaparin. A minimally activated assay (MAA) of whole blood clotting time was evaluated for the detection and relative quantification of enoxaparin. The assay cartridge consisted of a plain glass tube and detection magnet, with no additional sources of activation. Comparisons were also made with a point-of-care, activated partial thromboplastin time (aPTT) assay. Plasma or whole blood was spiked with enoxaparin at concentrations ranging from 0.1 to 1.0 anti-factor Xa IU/ml. A commercial preparation of heparinase I was used to digest enoxaparin, and clotting times were determined with and without heparinase incubation. Heparinase digestion caused an average shortening of clotting time of 21.1% (47.3 s) in blood spiked with 0.4 anti-Xa IU/ml enoxaparin, an amount expected in the therapeutic range; also, 0.1 anti-Xa IU/ml of enoxaparin could be reliably detected. The assay performed comparably when transferred to a point-of-care setting with heparinase being added directly to citrated blood collection tubes, followed by either MAA or aPTT assay. Strong correlations were obtained with both assays between the percent change in clotting time (after heparinase) and the added concentration of enoxaparin, or in comparison with the chromogenically measured concentration of enoxaparin. The assays for an individual blood sample can be completed within 10 min. |
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Toward development of a point-of-care assay of enoxaparin anticoagulant activity in whole blood |
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Pothula, Suryanarayana Kubal, Keshar Sanchala, Vajubhai T. Navarro, Iris |
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| score |
7.40166 |