Blood sample collection
23 Dec 2025
CapillaryHome
- Collector
- Nurse
- Device type
- Whatman 903 PSC
- Analytes
- 4
Overview
Key participant information
Participant code
COMFORT-036
Enrollment date
16 Dec 2025
Clinical site
Karolinska Hospital
Enrollment place
Hospital
Enrolled part
A
Status
Completed
Study Population Cohort
Cardiovascular disease
QUESTIONNAIRE
Complete
Study Visits
Details of participatnt visits in Part A and/or Part B
| Date | Part | Type of visit | Place | Status | Comments |
|---|---|---|---|---|---|
| 16 Dec 2025 | A | Screening | Hospital | Completed | Screening visit completed. Eligibility confirmed. |
| 23 Dec 2025 | A | 1st Visit | Hospital | Completed | Baseline visit completed. Sample collection performed at clinical site. |
Collections
Blood microsampling and venipuncture collections with associated analyte results
A
| Collection | Collection type | Collection place | Collector | Device type | Part | Analytes | Action |
|---|---|---|---|---|---|---|---|
Blood sample collection Details 23 Dec 2025 | Capillary | Home | Nurse | Whatman 903 PSC | A | 4 | 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 2026-01-27
| 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 | Strongly agree | — |
| 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 | Satisfied | — |
| B. Study Information and Visit Experience | B4 | Convenience of visit scheduling | Dissatisfied | — |
| B. Study Information and Visit Experience | B5 | Study staff treated me respectfully | Neutral | — |
| 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 | 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 agree | — |
| B. Study Information and Visit Experience | B10 | I felt comfortable providing feedback on sampling preferences | Strongly disagree | — |
| C. Conventional Sampling vs Microsampling Experience | C1 | Pain rating for conventional venous blood sampling (0-10) | 5 | — |
| 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 | Conventional blood sampling | Either option works for me. |
| 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 | Neutral | — |
| D. Microsampling Device Experience | D2 | The device caused little or no pain | Disagree | — |
| 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 | Disagree | — |
| D. Microsampling Device Experience | D5 | Problems experienced with the device | None | — |
| 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 | Very satisfied | — |
| E. Home / Self-Collection Experience | E3 | Helpfulness of training materials | Not answered | — |
| E. Home / Self-Collection Experience | E4 | Confidence using microsampling for self-collection | Agree | — |
| E. Home / Self-Collection Experience | E5 | Self-collection instructions were clear | Strongly agree | — |
| 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 | Agree | — |
| E. Home / Self-Collection Experience | E8 | Time required for collecting and returning samples was acceptable | Strongly disagree | — |
| E. Home / Self-Collection Experience | E9 | Microsampling fitted into my usual routine | Neutral | — |
| 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 | Dissatisfied | — |
| F. Training and Support | F1 | Which support types were helpful? | Printed instructions, Telephone/online support, In-person explanation | Video tutorial answered most of my doubts. |
| F. Training and Support | F2 | Which factors would build your confidence in using microsampling? | Clear printed/visual instructions, Trying the device first with a healthcare professional | — |
| 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 | Would prefer if I had ongoing support. |
| G. Future Preferences | G3 | If you answered Maybe or No, please explain | I would feel more comfortable with a healthcare professional present. | — |
Legal
Consent and withdrawal information
Date of consent
13 Dec 2025
Date of withdrawal
—
Withdraw reason
—