Tiny zaps to the arm: what happens to blood flow?
NCT ID NCT07635979
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked at how a device called Firefly® affects blood flow and oxygen levels in the arm muscles of 10 healthy adults. The device uses mild electrical pulses to stimulate nerves and muscles. Researchers measured changes in blood flow and oxygen while the device was on and off. The goal was simply to learn more about how the body responds, not to treat any disease.
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
-
10 people
The number who actually took part.
- Started
-
Sep 2025
- Finished
-
Oct 2025
- Lead sponsor
-
A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
-
18 to 45 years
- Sex
-
Anyone
- Healthy volunteers
-
Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide 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: * Aged 18 to 45 years (inclusive) * No known history of vascular or neurological conditions affecting the upper extremities * Able to read, understand, and communicate in English to ensure informed consent and safe participation in the study Exclusion Criteria: * Presence of any condition that contraindicates the use of neuromuscular electrical stimulation (e.g., implanted pacemaker, epilepsy) * Current or recent injury to the upper limbs that may interfere with stimulation or measurement * Anatomical variations in the brachial artery or axillary vein, specifically vascular branching outside expected anatomical locations, as identified by ultrasound, which may impair accurate blood flow measurement or device placement * Currently participating in another interventional or physiological research study or having done so within the past 30 days. * Currently pregnant
Get updates
Get notified about this study
Sign up to get updates when this study changes or when new studies for Healthy adult participants are added.
Genom att skicka in godkänner du våra Användarvillkor
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
Firstkind
High Wycombe, Buckinghamshire, HP11 1JX, United Kingdom
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Nicotine pouches put to the test: can they match the cigarette experience?
- Can a neck device dial down pain by zapping the vagus nerve?
- Tight calves may dull the Sole's sense of touch
- Can a migraine pill sway the Body's balance reflex?
- Can an experimental drug share the Body's chemical highways without causing a pileup?
- Can dirty city air speed up the Body's aging clock?