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catalyst® total t4 (tt4) slide  (IDEXX)


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    IDEXX catalyst® total t4 (tt4) slide
    Catalyst® Total T4 (Tt4) Slide, supplied by IDEXX, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/catalyst%C2%AE+total+t4+(tt4)+slide/catalyst+total+t4+test/us12345641-619-22-30
    Average 90 stars, based on 1 article reviews
    catalyst® total t4 (tt4) slide - by Bioz Stars, 2026-09
    90/100 stars

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    catalyst® total t4 (tt4) slide  (IDEXX)
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    IDEXX catalyst® total t4 (tt4) slide
    Catalyst® Total T4 (Tt4) Slide, supplied by IDEXX, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/catalyst%C2%AE+total+t4+(tt4)+slide/catalyst+total+t4+test/us12345641-619-22-30
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    catalyst® total t4 (tt4) slide - by Bioz Stars, 2026-09
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    dry-slide tt4 assay (ctt4; catalyst total t4 test)  (IDEXX)
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    Study population concentration groups for dog and <t> cat TT4 </t>
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    Study population concentration groups for dog and cat TT4

    Journal: Journal of Veterinary Internal Medicine

    Article Title: Comparison of 2 assays for measuring serum total thyroxine concentration in dogs and cats

    doi: 10.1111/jvim.15703

    Figure Lengend Snippet: Study population concentration groups for dog and cat TT4

    Article Snippet: A novel dry‐slide TT4 assay (CTT4; Catalyst Total T4 Test, IDEXX Laboratories, Inc, Westbrook, Maine) recently was introduced for in‐clinic use using 2 bench top point‐of‐care analyzers (IDEXX Catalyst One Analyzer [C1]; IDEXX Catalyst Dx Analyzer [CDx]).

    Techniques: Concentration Assay

    Method comparison of canine and feline TT4 results by the Passing‐Bablok regression including sample size (n), MTT4 value, non‐reference value (either CTT4 or ITT4) depending on the row, correlation (r) value, constant bias ( y ‐intercept), proportional bias (slope), and cumulative sum (CUSUM) linearity

    Journal: Journal of Veterinary Internal Medicine

    Article Title: Comparison of 2 assays for measuring serum total thyroxine concentration in dogs and cats

    doi: 10.1111/jvim.15703

    Figure Lengend Snippet: Method comparison of canine and feline TT4 results by the Passing‐Bablok regression including sample size (n), MTT4 value, non‐reference value (either CTT4 or ITT4) depending on the row, correlation (r) value, constant bias ( y ‐intercept), proportional bias (slope), and cumulative sum (CUSUM) linearity

    Article Snippet: A novel dry‐slide TT4 assay (CTT4; Catalyst Total T4 Test, IDEXX Laboratories, Inc, Westbrook, Maine) recently was introduced for in‐clinic use using 2 bench top point‐of‐care analyzers (IDEXX Catalyst One Analyzer [C1]; IDEXX Catalyst Dx Analyzer [CDx]).

    Techniques: Comparison

    A, Passing‐Bablok regression of canine CTT4 versus MTT4. The regression equation for the Passing‐Bablok regression was y = 0.103 + 0.860 x . The solid line represents the data regression line with dashed lines representing the confidence intervals. B, Bland‐Altman plot of CTT4 versus MTT4 for dogs. The solid line represents the mean difference (−0.28 μg/dL [−3.60 nmol/L]) and the dashed lines represent the mean difference ±1.96 SD (−1.43‐0.86 μg/dL [−18.41‐11.07 nmol/L]). CTT4, Catalyst Total T4 Test; MTT4, Microgenics DRI human TT4 EIA assay

    Journal: Journal of Veterinary Internal Medicine

    Article Title: Comparison of 2 assays for measuring serum total thyroxine concentration in dogs and cats

    doi: 10.1111/jvim.15703

    Figure Lengend Snippet: A, Passing‐Bablok regression of canine CTT4 versus MTT4. The regression equation for the Passing‐Bablok regression was y = 0.103 + 0.860 x . The solid line represents the data regression line with dashed lines representing the confidence intervals. B, Bland‐Altman plot of CTT4 versus MTT4 for dogs. The solid line represents the mean difference (−0.28 μg/dL [−3.60 nmol/L]) and the dashed lines represent the mean difference ±1.96 SD (−1.43‐0.86 μg/dL [−18.41‐11.07 nmol/L]). CTT4, Catalyst Total T4 Test; MTT4, Microgenics DRI human TT4 EIA assay

    Article Snippet: A novel dry‐slide TT4 assay (CTT4; Catalyst Total T4 Test, IDEXX Laboratories, Inc, Westbrook, Maine) recently was introduced for in‐clinic use using 2 bench top point‐of‐care analyzers (IDEXX Catalyst One Analyzer [C1]; IDEXX Catalyst Dx Analyzer [CDx]).

    Techniques: Enzyme Immunoassay

    A, Passing‐Bablok regression of canine ITT4 versus MTT4. The regression equation for the Passing‐Bablok regression was y = 0.144 + 0.762 x . The solid line represents the data regression line with dashed lines representing the confidence intervals. B, Bland‐Altman plot of ITT4 versus MTT4 for dogs. The solid line represents the mean difference (−0.66 μg/dL [8.50 nmol/L]) and the dashed lines represent the mean difference ±1.96 SD (−2.08‐0.75 μg/dL [−26.77‐9.65 nmol/L]). ITT4, Immulite 1000 chemiluminescent TT4 assay; MTT4, Microgenics DRI human TT4 EIA assay

    Journal: Journal of Veterinary Internal Medicine

    Article Title: Comparison of 2 assays for measuring serum total thyroxine concentration in dogs and cats

    doi: 10.1111/jvim.15703

    Figure Lengend Snippet: A, Passing‐Bablok regression of canine ITT4 versus MTT4. The regression equation for the Passing‐Bablok regression was y = 0.144 + 0.762 x . The solid line represents the data regression line with dashed lines representing the confidence intervals. B, Bland‐Altman plot of ITT4 versus MTT4 for dogs. The solid line represents the mean difference (−0.66 μg/dL [8.50 nmol/L]) and the dashed lines represent the mean difference ±1.96 SD (−2.08‐0.75 μg/dL [−26.77‐9.65 nmol/L]). ITT4, Immulite 1000 chemiluminescent TT4 assay; MTT4, Microgenics DRI human TT4 EIA assay

    Article Snippet: A novel dry‐slide TT4 assay (CTT4; Catalyst Total T4 Test, IDEXX Laboratories, Inc, Westbrook, Maine) recently was introduced for in‐clinic use using 2 bench top point‐of‐care analyzers (IDEXX Catalyst One Analyzer [C1]; IDEXX Catalyst Dx Analyzer [CDx]).

    Techniques: Enzyme Immunoassay

    A, Passing‐Bablok regression line of feline CTT4 versus MTT4 is shown but the assumption of linearity was violated. Piecewise regression analysis yielded a slope of 1.25 (95% CI, 0.93‐1.56) indicating a tendency to overestimate TT4 concentration until the MTT4 breakpoint of 1.80 μg/dL (95% CI, 0.94‐2.66 μg/dL) [23.17 nmol/L; 95% CI, 12.10‐34.24 nmol/L). The second linear segment from 1.80 μg/dL [23.17 nmol/L) had a slope of 0.94 (95% CI, 0.93‐0.96), indicating proportional bias with subsequent underestimation of TT4 concentrations. B, Bland‐Altman plot of CTT4 versus MTT4 for cats. The solid line represents the mean difference (0.10 μg/dL [1.29 nmol/L]) and the dashed lines represent the mean difference ±1.96 SD (−1.19‐1.30 μg/dL [−15.32‐16.73 nmol/L]). CI, confidence interval; CTT4, Catalyst Total T4 Test; MTT4, Microgenics DRI human TT4 EIA assay

    Journal: Journal of Veterinary Internal Medicine

    Article Title: Comparison of 2 assays for measuring serum total thyroxine concentration in dogs and cats

    doi: 10.1111/jvim.15703

    Figure Lengend Snippet: A, Passing‐Bablok regression line of feline CTT4 versus MTT4 is shown but the assumption of linearity was violated. Piecewise regression analysis yielded a slope of 1.25 (95% CI, 0.93‐1.56) indicating a tendency to overestimate TT4 concentration until the MTT4 breakpoint of 1.80 μg/dL (95% CI, 0.94‐2.66 μg/dL) [23.17 nmol/L; 95% CI, 12.10‐34.24 nmol/L). The second linear segment from 1.80 μg/dL [23.17 nmol/L) had a slope of 0.94 (95% CI, 0.93‐0.96), indicating proportional bias with subsequent underestimation of TT4 concentrations. B, Bland‐Altman plot of CTT4 versus MTT4 for cats. The solid line represents the mean difference (0.10 μg/dL [1.29 nmol/L]) and the dashed lines represent the mean difference ±1.96 SD (−1.19‐1.30 μg/dL [−15.32‐16.73 nmol/L]). CI, confidence interval; CTT4, Catalyst Total T4 Test; MTT4, Microgenics DRI human TT4 EIA assay

    Article Snippet: A novel dry‐slide TT4 assay (CTT4; Catalyst Total T4 Test, IDEXX Laboratories, Inc, Westbrook, Maine) recently was introduced for in‐clinic use using 2 bench top point‐of‐care analyzers (IDEXX Catalyst One Analyzer [C1]; IDEXX Catalyst Dx Analyzer [CDx]).

    Techniques: Concentration Assay, Enzyme Immunoassay

    A, Passing‐Bablok regression of feline ITT4 versus MTT4. The regression equation for the Passing‐Bablok regression was y = 0.220 + 0.710 x . The solid line represents the data regression line. B, Bland‐Altman plot of ITT4 versus MTT4 for cats. The solid line represents the mean difference (−1.11 μg/dL [−14.29 nmol/L]) and the dashed lines represent the mean difference ±1.96 SD (−2.58‐0.35 μg/dL [−33.21‐4.51 nmol/L]). ITT4, Immulite 1000 chemiluminescent TT4 assay; MTT4, Microgenics DRI human TT4 EIA assay

    Journal: Journal of Veterinary Internal Medicine

    Article Title: Comparison of 2 assays for measuring serum total thyroxine concentration in dogs and cats

    doi: 10.1111/jvim.15703

    Figure Lengend Snippet: A, Passing‐Bablok regression of feline ITT4 versus MTT4. The regression equation for the Passing‐Bablok regression was y = 0.220 + 0.710 x . The solid line represents the data regression line. B, Bland‐Altman plot of ITT4 versus MTT4 for cats. The solid line represents the mean difference (−1.11 μg/dL [−14.29 nmol/L]) and the dashed lines represent the mean difference ±1.96 SD (−2.58‐0.35 μg/dL [−33.21‐4.51 nmol/L]). ITT4, Immulite 1000 chemiluminescent TT4 assay; MTT4, Microgenics DRI human TT4 EIA assay

    Article Snippet: A novel dry‐slide TT4 assay (CTT4; Catalyst Total T4 Test, IDEXX Laboratories, Inc, Westbrook, Maine) recently was introduced for in‐clinic use using 2 bench top point‐of‐care analyzers (IDEXX Catalyst One Analyzer [C1]; IDEXX Catalyst Dx Analyzer [CDx]).

    Techniques: Enzyme Immunoassay