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

Not Applicable

• Conditions: M05; Seropositive rheumatoid arthritis

• Registration Number: DRKS00023526
• Lead Sponsor: Medizinische Klinik 3, Universitätsklinikum Erlangen

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Study Start: 2020-11-06
• Last Update Posted: 19 August 2024

Recruitment & Eligibility

• Status: Pending
• Sex: All
• Target Recruitment: 50

Inclusion Criteria

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

Exclusion Criteria

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

Study & Design

• Study Type: interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
• Rheumatoid factor IgM titer and CCP IgG antibody titer from venous blood and capillary blood from the upper arm<br>• Rheumatoid factor IgM titer and CCP IgG antibody titer from venous blood and capillary blood from the fingertip

Secondary Outcome Measures

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