Blood sample collection
30 Oct 2025
VenousClinic
- Collector
- Phlebotomist
- Device type
- —
- Analytes
- 4
Overview
Key participant information
Participant code
COMFORT-047
Enrollment date
23 Oct 2025
Clinical site
Karolinska Hospital
Enrollment place
Not applicable (N/A)
Enrolled part
AB
Status
Withdrawn
Study Population Cohort
Pediatrics
QUESTIONNAIRE
Complete
Study Visits
Details of participatnt visits in Part A and/or Part B
| Date | Part | Type of visit | Place | Status | Comments |
|---|---|---|---|---|---|
| 23 Oct 2025 | A | Screening | Hospital | Withdrawn | Screening visit completed. Eligibility confirmed. |
| 30 Oct 2025 | A | 1st Visit | Hospital | Withdrawn | Baseline visit completed. Sample collection performed at clinical site. |
| 20 Nov 2025 | A | 2nd Visit | Health Primary Care | Withdrawn | Ad-hoc follow-up visit. |
| 11 Dec 2025 | A | 3rd Visit | Hospital | Withdrawn | Ad-hoc follow-up visit. |
| 01 Jan 2026 | B | 1st Visit | Not applicable (N/A) | Withdrawn | Follow-up visit completed. Capillary microsampling at home. |
| 22 Jan 2026 | B | 2nd Visit | Hospital | Withdrawn | Ad-hoc follow-up visit. |
| 12 Feb 2026 | B | 3rd Visit | Not applicable (N/A) | Withdrawn | Ad-hoc follow-up visit. |
Collections
Blood microsampling and venipuncture collections with associated analyte results
A
Blood sample collection
20 Nov 2025
VenousClinic
- Collector
- Caregiver
- Device type
- —
- Analytes
- 7
Blood sample collection
11 Dec 2025
CapillaryHome
- Collector
- Caregiver
- Device type
- Capitainer B
- Analytes
- 3
Blood sample collection
01 Jan 2026
VenousClinic
- Collector
- Nurse
- Device type
- —
- Analytes
- 5
Blood sample collection
22 Jan 2026
VenousClinic
- Collector
- Participant
- Device type
- —
- Analytes
- 6
Blood sample collection
12 Feb 2026
VenousClinic
- Collector
- Phlebotomist
- Device type
- —
- Analytes
- 5
| Collection | Collection type | Collection place | Collector | Device type | Part | Analytes | Action |
|---|---|---|---|---|---|---|---|
Blood sample collection Details 30 Oct 2025 | Venous | Clinic | Phlebotomist | — | A | 4 | Open |
Blood sample collection Details 20 Nov 2025 | Venous | Clinic | Caregiver | — | A | 7 | Open |
Blood sample collection Details 11 Dec 2025 | Capillary | Home | Caregiver | Capitainer B | A | 3 | Open |
Blood sample collection Details 01 Jan 2026 | Venous | Clinic | Nurse | — | B | 5 | Open |
Blood sample collection Details 22 Jan 2026 | Venous | Clinic | Participant | — | B | 6 | Open |
Blood sample collection Details 12 Feb 2026 | Venous | Clinic | Phlebotomist | — | B | 5 | Open |
Adverse Events
Reported adverse events during the study
No adverse events reported
This participant has no adverse events recorded during the study.
Medical profile
Past medical history and conditions
Coming soon
Past medical history, conditions, medications and allergies will appear here once the ETL feed is connected.
Usability Questionnaire
Participant responses — surveyed on 2025-12-14
| SECTION | Q # | Question | Answer | Comments / Free-text |
|---|---|---|---|---|
| A. Previous Experience with Microsampling | A1 | Had you heard about blood microsampling before this study? | Yes | — |
| A. Previous Experience with Microsampling | A2 | Name of the microsampling device previously known | Not answered | — |
| A. Previous Experience with Microsampling | A3 | Number of previous uses | 0 | — |
| A. Previous Experience with Microsampling | A4 | Ease of previous use | Very easy | — |
| A. Previous Experience with Microsampling | A5 | Previous difficulties experienced | Device malfunction, Insufficient sample, Bruising | Device was awkward to position. |
| B. Study Information and Visit Experience | B1 | Study information was easy to understand | Strongly disagree | — |
| B. Study Information and Visit Experience | B2 | I felt comfortable asking questions about the study | Strongly agree | — |
| B. Study Information and Visit Experience | B3 | Satisfaction with study visit organisation | Dissatisfied | — |
| B. Study Information and Visit Experience | B4 | Convenience of visit scheduling | Satisfied | — |
| B. Study Information and Visit Experience | B5 | Study staff treated me respectfully | Disagree | — |
| B. Study Information and Visit Experience | B6 | I felt comfortable asking questions during the visit | Agree | — |
| B. Study Information and Visit Experience | B7 | Satisfaction with answers received | Not answered | — |
| B. Study Information and Visit Experience | B8 | Visit duration was acceptable | Strongly disagree | — |
| B. Study Information and Visit Experience | B9 | Impact on daily life was acceptable | Neutral | — |
| B. Study Information and Visit Experience | B10 | I felt comfortable providing feedback on sampling preferences | Agree | — |
| C. Conventional Sampling vs Microsampling Experience | C1 | Pain rating for conventional venous blood sampling (0-10) | 10 (worst pain) | — |
| C. Conventional Sampling vs Microsampling Experience | C2 | Pain rating for microsampling device collection (0-10) | 9 | — |
| C. Conventional Sampling vs Microsampling Experience | C3 | Preferred blood collection method if given a choice | Microsampling | — |
| C. Conventional Sampling vs Microsampling Experience | C4 | Why did you choose this preferred method? | Not answered | — |
| D. Microsampling Device Experience | D1 | The device seemed easy to use | Neutral | — |
| D. Microsampling Device Experience | D2 | The device caused little or no pain | Agree | — |
| D. Microsampling Device Experience | D3 | I could use the device at home | Agree | — |
| D. Microsampling Device Experience | D4 | Confidence that microsampling could replace conventional blood sampling | Strongly agree | — |
| D. Microsampling Device Experience | D5 | Problems experienced with the device | Device error | — |
| E. Home / Self-Collection Experience | E1 | Did you take part in Part A (home self-collection)? | Yes | — |
| E. Home / Self-Collection Experience | E2 | Satisfaction with microsampling equipment and materials | Not answered | — |
| E. Home / Self-Collection Experience | E3 | Helpfulness of training materials | Neutral | — |
| E. Home / Self-Collection Experience | E4 | Confidence using microsampling for self-collection | Strongly disagree | — |
| E. Home / Self-Collection Experience | E5 | Self-collection instructions were clear | Disagree | — |
| E. Home / Self-Collection Experience | E6 | I was able to complete sample collection without help | Agree | — |
| E. Home / Self-Collection Experience | E7 | I had access to support during self-collection | Disagree | — |
| E. Home / Self-Collection Experience | E8 | Time required for collecting and returning samples was acceptable | Disagree | — |
| E. Home / Self-Collection Experience | E9 | Microsampling fitted into my usual routine | Agree | — |
| E. Home / Self-Collection Experience | E10 | I felt safe and confident during self-collection | Agree | — |
| E. Home / Self-Collection Experience | E11 | Satisfaction with shipping samples back to the lab | Neutral | — |
| F. Training and Support | F1 | Which support types were helpful? | Video tutorial, Telephone/online support, Printed instructions | Nurse walked me through the steps. |
| F. Training and Support | F2 | Which factors would build your confidence in using microsampling? | Doctor recommendation, Trying the device first with a healthcare professional, Online/telephone support | — |
| G. Future Preferences | G1 | Preferred future blood collection location | At home | — |
| G. Future Preferences | G2 | Willingness to use a microsampling device at home for regular health-related blood sampling | Yes | — |
| G. Future Preferences | G3 | If you answered Maybe or No, please explain | Not answered | — |
Legal
Consent and withdrawal information
Date of consent
20 Oct 2025
Date of withdrawal
22 Dec 2025
Withdraw reason
Personal reasons