Blood sample collection
26 Dec 2025
VenousClinic
- Collector
- Nurse
- Device type
- —
- Analytes
- 4
Overview
Key participant information
Participant code
COMFORT-045
Enrollment date
19 Dec 2025
Clinical site
Karolinska Hospital
Enrollment place
Hospital
Enrolled part
AB
Status
Completed
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 |
|---|---|---|---|---|---|
| 19 Dec 2025 | A | Screening | Hospital | Completed | Screening visit completed. Eligibility confirmed. |
| 26 Dec 2025 | A | 1st Visit | Hospital | Completed | Baseline visit completed. Sample collection performed at clinical site. |
| 16 Jan 2026 | A | 2nd Visit | Not applicable (N/A) | Completed | Ad-hoc follow-up visit. |
| 06 Feb 2026 | A | 3rd Visit | Hospital | Completed | Ad-hoc follow-up visit. |
| 27 Feb 2026 | B | 1st Visit | Not applicable (N/A) | Completed | Follow-up visit completed. Capillary microsampling at home. |
| 20 Mar 2026 | B | 2nd Visit | Hospital | Completed | Ad-hoc follow-up visit. |
| 10 Apr 2026 | B | 3rd Visit | Not applicable (N/A) | Completed | Ad-hoc follow-up visit. |
Collections
Blood microsampling and venipuncture collections with associated analyte results
A
Blood sample collection
16 Jan 2026
VenousClinic
- Collector
- Nurse
- Device type
- —
- Analytes
- 5
Blood sample collection
06 Feb 2026
CapillaryClinic
- Collector
- Phlebotomist
- Device type
- Hemaspot SE
- Analytes
- 5
Blood sample collection
27 Feb 2026
CapillaryHome
- Collector
- Phlebotomist
- Device type
- Whatman 903 PSC
- Analytes
- 3
Blood sample collection
20 Mar 2026
VenousClinic
- Collector
- Participant
- Device type
- —
- Analytes
- 4
Blood sample collection
10 Apr 2026
CapillaryHome
- Collector
- Caregiver
- Device type
- Greiner MiniCollect EDTA
- Analytes
- 7
| Collection | Collection type | Collection place | Collector | Device type | Part | Analytes | Action |
|---|---|---|---|---|---|---|---|
Blood sample collection Details 26 Dec 2025 | Venous | Clinic | Nurse | — | A | 4 | Open |
Blood sample collection Details 16 Jan 2026 | Venous | Clinic | Nurse | — | A | 5 | Open |
Blood sample collection Details 06 Feb 2026 | Capillary | Clinic | Phlebotomist | Hemaspot SE | A | 5 | Open |
Blood sample collection Details 27 Feb 2026 | Capillary | Home | Phlebotomist | Whatman 903 PSC | B | 3 | Open |
Blood sample collection Details 20 Mar 2026 | Venous | Clinic | Participant | — | B | 4 | Open |
Blood sample collection Details 10 Apr 2026 | Capillary | Home | Caregiver | Greiner MiniCollect EDTA | B | 7 | 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 2026-01-28
| SECTION | Q # | Question | Answer | Comments / Free-text |
|---|---|---|---|---|
| A. Previous Experience with Microsampling | A1 | Had you heard about blood microsampling before this study? | No | — |
| 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 | Not answered | — |
| A. Previous Experience with Microsampling | A4 | Ease of previous use | Not answered | — |
| A. Previous Experience with Microsampling | A5 | Previous difficulties experienced | Not answered | — |
| B. Study Information and Visit Experience | B1 | Study information was easy to understand | Neutral | — |
| 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 | Neutral | — |
| B. Study Information and Visit Experience | B4 | Convenience of visit scheduling | Satisfied | — |
| B. Study Information and Visit Experience | B5 | Study staff treated me respectfully | Strongly agree | — |
| B. Study Information and Visit Experience | B6 | I felt comfortable asking questions during the visit | Strongly agree | — |
| B. Study Information and Visit Experience | B7 | Satisfaction with answers received | Very satisfied | — |
| B. Study Information and Visit Experience | B8 | Visit duration was acceptable | Strongly agree | — |
| B. Study Information and Visit Experience | B9 | Impact on daily life was acceptable | Strongly disagree | — |
| B. Study Information and Visit Experience | B10 | I felt comfortable providing feedback on sampling preferences | Disagree | — |
| C. Conventional Sampling vs Microsampling Experience | C1 | Pain rating for conventional venous blood sampling (0-10) | 9 | — |
| C. Conventional Sampling vs Microsampling Experience | C2 | Pain rating for microsampling device collection (0-10) | 7 | — |
| C. Conventional Sampling vs Microsampling Experience | C3 | Preferred blood collection method if given a choice | Conventional blood sampling | — |
| C. Conventional Sampling vs Microsampling Experience | C4 | Why did you choose this preferred method? | Both methods felt similar to me; convenience matters more. | — |
| D. Microsampling Device Experience | D1 | The device seemed easy to use | Disagree | — |
| D. Microsampling Device Experience | D2 | The device caused little or no pain | Strongly agree | — |
| D. Microsampling Device Experience | D3 | I could use the device at home | Strongly agree | — |
| D. Microsampling Device Experience | D4 | Confidence that microsampling could replace conventional blood sampling | Agree | — |
| D. Microsampling Device Experience | D5 | Problems experienced with the device | Pain, Insufficient blood | No issues noted. |
| 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 | Unhelpful | — |
| E. Home / Self-Collection Experience | E4 | Confidence using microsampling for self-collection | Strongly agree | — |
| 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 | Strongly disagree | — |
| E. Home / Self-Collection Experience | E7 | I had access to support during self-collection | Strongly agree | — |
| E. Home / Self-Collection Experience | E8 | Time required for collecting and returning samples was acceptable | Agree | — |
| E. Home / Self-Collection Experience | E9 | Microsampling fitted into my usual routine | Strongly disagree | — |
| E. Home / Self-Collection Experience | E10 | I felt safe and confident during self-collection | Strongly agree | — |
| E. Home / Self-Collection Experience | E11 | Satisfaction with shipping samples back to the lab | Satisfied | — |
| F. Training and Support | F1 | Which support types were helpful? | In-person explanation, Printed instructions, Other | Printed booklet was particularly useful. |
| F. Training and Support | F2 | Which factors would build your confidence in using microsampling? | Tutorial videos | — |
| G. Future Preferences | G1 | Preferred future blood collection location | No preference | — |
| G. Future Preferences | G2 | Willingness to use a microsampling device at home for regular health-related blood sampling | Maybe | Happy to do it if instructions remain clear. |
| G. Future Preferences | G3 | If you answered Maybe or No, please explain | Not answered | — |
Legal
Consent and withdrawal information
Date of consent
16 Dec 2025
Date of withdrawal
—
Withdraw reason
—