Table 1 Overview of True Dose kit versions and experimental Use; comparison of design features and specific experimental applications of True Dose kit versions 1.0 to 4.0 evaluated in 2024 for analytical equivalence, stability, and clinical validation studies.

From: Development and evaluation of a novel capillary blood collection method for decentralized therapeutic drug monitoring using the True Dose kit

Feature

1.0

2.0

3.0

4.0

Release Date

May 2024

October 2024

November 2024

December 2024

Matrix Type

PP version 1.0

PP version 2.0

PP version 3.0

PP version 3.0

Internal Standard (Conc.)

400 nM Dox/Dauno + additives

1 µM Dox/Dauno + additives

1 µM Dox/Dauno + additives

1 µM Dox/Dauno + additives

Microtube Volume

1.5 mL

1.5 mL

2.0 mL

2.0 mL

Precipitation Solvent Volume

500 µL

500 µL

1000 µL

1000 µL

Precipitation Solvent Composition

Organic solvents

mixture

Organic solvents

mixture

Organic solvents

mixture

Organic solvents

mixture

Steel Beads for mixing

Yes

Yes

Yes

Yes

Sample Volume (Blood)

20 or 50 µL

50 µL

50 µL

50 µL

Incubation time prior analytical work up

18 h, 3 days, 7 days, 14 days

3 days

3 days

3 days

Used for

Analytical equivalence, post-activation stability, hematocrit and initial clinical evaluation

Pre-activation stability and clinical evaluation

Pre-activation stability and clinical evaluation

Final analytical equivalence and pre/post-activation stability.

  1. PP = polypropylene matrix; doxo/dauno = doxorubicin/daunorubicin.