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Could a simple arm patch replace the needle for vitamin d tests?

NCT ID NCT07782528

Knowledge-focused Sponsor: The Royal Wolverhampton Hospitals NHS Trust Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Aug 24, 2026 · Last updated Aug 25, 2026 · Updated 1 time

Summary

This trial evaluates a new device called Tasso+ that lets people collect a small blood sample from their upper arm, potentially replacing the traditional finger-prick or venous blood draw for vitamin D testing. Researchers will compare vitamin D levels measured from the Tasso+ sample with those from standard methods to see if they agree. They will also ask participants about pain, ease of use, and clarity of instructions. The study involves 35 adult healthcare staff who already use a dried blood spot vitamin D service.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Tasso+ device for capillary blood self-sampling
What this could lead to
If successful, this could make vitamin D testing easier and more accessible, allowing people to collect blood samples at home without a clinic visit.
What could go wrong
This is a small early-stage study, so results may not apply to the general population. The device may not match the accuracy of traditional blood draws, and user error could affect sample quality.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 35 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Jan 2027

An estimate. Start dates often move.

Expected to finish

Dec 2027

An estimate. End dates often move.

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Adults aged 18 years or older. * Current healthcare staff or staff volunteers. * Already consented to use the routine dried blood spot (DBS) vitamin D service. * Able and willing to provide all three sample types- routine DBS finger-prick sample, a Tasso+ upper-arm self-collected capillary sample, and a venous blood sample taken by a trained Trust phlebotomist. * Able to give informed consent. * Able to complete a short questionnaire in English. Exclusion Criteria: * • Participants will not be able to take part if any of the following apply: * Under 18 years of age * Not a member of staff or staff volunteer * Known difficulty with blood sampling, such as a history of fainting, severe needle phobia, or conditions that make venepuncture unsafe. * Skin conditions or injuries on the upper arm that would prevent safe use of the Tasso+ device. * Bleeding disorders or current use of anticoagulant medication that would make capillary or venous sampling unsafe. * Inability to give informed consent, including difficulty understanding the study information. * Inability to complete the short questionnaire in English, as this is needed to assess user experience.

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Conditions

The condition(s) this trial relates to.

vitamin D deficiency

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Vitamin D

How to take part

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  1. The official record

    The full official record for this study. This one lists no contact details, but it is the first place any would appear.

    Open the record ↗

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