Healthy volunteers
Conditions
Interventions
Group 1: Investigation of the effect of storage time prior to centrifugation:
Potassium concentrations obtained upon immediate centrifugation (t0) are compared with concentrations measured at later ce
Sponsors
Universitätsinstitut für klinische Chemie und Laboratoriumsmedizin des Klinikums Oldenburg
Eligibility
Sex/Gender
All
Age
18 Years to No maximum
Inclusion criteria
Inclusion criteria: Age: 18 or older
Exclusion criteria
Exclusion criteria: Missing or incomplete informed consent form Absence of or questionable capacity to consent Insufficient knowledge of German Only partial consent to the procedures Lack of compliance Withdrawal at the participant’s own request without stating reasons
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Target criterion: Potassium concentration at various centrifugation time points (in both lithium heparin and serum sample tubes). Testing time points: Immediately after blood collection, as well as 2, 4, 6, 8, and 24 hours later. Measurement method: Potassium is measured using indirect potentiometry with an ion-selective electrode (ISE) on the CobasPro (Roche Diagnostics). | — |
Secondary
| Measure | Time frame |
|---|---|
| 1. Differences in potassium concentrations at t0 (immediate centrifugation) compared to various measurement time points after centrifugation (by material and storage condition) 2. Differences in potassium concentrations at t0 (immediate centrifugation) compared to various measurement time points after centrifugation (comparison between materials) 3. Differences in potassium concentrations at t0 (immediate centrifugation) compared to different measurement times after centrifugation (comparison between storage conditions: 4°C, room temperature) Measurement method: Potassium is measured using indirect potentiometry with an ion-selective electrode (ISE) on the CobasPro (Roche Diagnostics). | — |
Countries
Germany
Contacts
Public ContactAstrid Petersmann
Universitätsinstitut für klinische Chemie und Laboratoriumsmedizin des Klinikums Oldenburg
Outcome results
None listed