Pilot study comparing venous and capillary blood to analyze laboratory parameters in patients with rheumatoid arthritis

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

DRKS

Registry ID

DRKS00023526

Enrollment

Registered

2020-11-06

Start date

2020-11-01

Completion date

Unknown

Last updated

2025-04-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

M05

Interventions

Group 1: Capillary blood collection from the upper arm (TASSO-SST) Group 2: Capillary blood collection at the fingertip (BD Microtainer)

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: - Fulfillment of the EULAR / ACR RA classification criteria - The patient speaks fluent German - Previous detection of RF or CCP antibodies

Exclusion criteria

Exclusion criteria: The patient is unwilling or unable to participate in the study.

Design outcomes

Primary

Measure	Time frame
• Rheumatoid factor IgM titer and CCP IgG antibody titer from venous blood and capillary blood from the upper arm • Rheumatoid factor IgM titer and CCP IgG antibody titer from venous blood and capillary blood from the fingertip	—

Secondary

Measure	Time frame
• Acceptance of capillary blood sampling from the upper arm (net promoter score, system usability scale) • Acceptance of capillary blood sampling at the fingertip (net promoter score, system usability scale) • Duration of the capillary blood collection from the upper arm (seconds) • Duration of the capillary blood collection from the fingertip (seconds) • Duration of venous blood collection (seconds) • Pain of capillary blood sampling from the upper arm (visual analogue scale 0-10) • Pain of capillary blood sampling from the upper arm (visual analogue scale 0-10) • Pain of capillary blood sampling from the fingertip (visual analog scale 0-10) • Resulting blood volume from the upper arm (µl) • Resulting blood volume from the fingertip (µl)	—

Measure

Time frame

• Acceptance of capillary blood sampling from the upper arm (net promoter score, system usability scale) • Acceptance of capillary blood sampling at the fingertip (net promoter score, system usability scale) • Duration of the capillary blood collection from the upper arm (seconds) • Duration of the capillary blood collection from the fingertip (seconds) • Duration of venous blood collection (seconds) • Pain of capillary blood sampling from the upper arm (visual analogue scale 0-10) • Pain of capillary blood sampling from the upper arm (visual analogue scale 0-10) • Pain of capillary blood sampling from the fingertip (visual analog scale 0-10) • Resulting blood volume from the upper arm (µl) • Resulting blood volume from the fingertip (µl)

—

Countries

Germany

Contacts

Public ContactJohannes Knitza

Medizinische Klinik 3, Universitätsklinikum Erlangen

johannes.knitza at uk-erlangen.de+4991318534742

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 12, 2026