ClinicalTrials.gg
RecruitingNCT05476913Updated Mar 4, 2025

GEKO Venous Thromboembolism Prevention Study

An interventional study of geko™ device in Stroke, Acute, Venous Thromboembolism and Deep Vein Thrombosis, sponsored by Firstkind Ltd. Recruiting at 18 sites in United Kingdom. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-03-04.

Sponsored by Firstkind Ltd (part of Sky Medical Technology) · Not applicable, Interventional, and Prevention

From the registry’s dates

  • Primary completion was expected by Apr 2025, 1 year 6 months ago, but the record still lists the study as recruiting.
  • Started Jul 2023; still recruiting 3 years 4 months later.

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Phase
Not applicable
Study type
Interventional
Enrollment
1,200
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-14

Among 372 studies in Stroke with a site in United Kingdom — 60 open to participants now, 80 under way, 8 of them phase 3. Stroke · United Kingdom.

Planned enrollment
56th of 257
1,200 · median 62
Started
2023
with 21 others
No phase
149 of 372
23 open now
Primary completion
2025-04
later than 21 of 79 live
Registered
300th of 372
by date

Among the 372 studies in Stroke with a site in United Kingdom, this one is the 56th largest by planned enrollment of the 257 interventional ones that give a count, is one of 22 that started in 2023, is one of 149 with no phase, reaches primary completion later than 21 of the 79 other live ones, and was the 300th registered.

Stroke

8,268 studies on the registry are indexed under Stroke; 2,062 are open to participants now.

Browse Stroke studies →

Open to participants now

60 of the 372 studies in Stroke with a site in United Kingdom are open now. Recruiting first, the newest first:

55 more — sign in →

All 60 open studies →

A study can be open while its sites in United Kingdom have not opened yet or have stopped. Only those recruiting at a site in United Kingdom →

Who these studies take

Of the 1,418 Stroke studies recruiting now, 696 (49%) set no upper age limit and 282 (20%) stop at 75 or younger; 77 take children under 18; 196 take healthy volunteers.

This study: 18 Years and older · all sexes · no healthy volunteers.

The full table on the hub →

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 372 studies in Stroke with a site in United Kingdom, or all of them as a file.
02

Study summary

This multicentre, randomised geko™ venous thromboembolism (VTE) prevention study will prospectively collect clinical data on VTE occurrences in immobile patients after stroke, who will be randomised, on a 1:1 allocation, to receive either standard of care (Intermittent Pneumatic Compression) or geko™ neuromuscular electrostimulation device. The aim is to assess the prevention of VTE during a follow-up period of 90 days (three months) post-randomisation.

Read the detailed description

Venous thromboembolism (VTE) is a disabling and potentially fatal outcome that may be acquired after having a stroke. The standard treatment to prevent the development of VTE is to give anticoagulation medication. However, this is not recommended in the UK after stroke. Instead the recommended treatment is Intermittent Pneumatic Compression (IPC), where cuffs placed around the lower legs are filled with air to help squeeze the legs and induce blood flow. However, not all patients are able to receive or tolerate IPC treatment. Another treatment which has shown promising results to prevent VTE in immobile patients after stroke, is with a medical device called the geko™ device. The geko™ device is a CE marked medical device which means the manufacturer has checked that the device complies with the essential safety and performance requirements for its' intended use which is to increase blood circulation to help prevent VTE. The aim of this study is to determine if the geko™ device is more effective at preventing VTE in immobile acute stroke patients, than the current IPC standard of care treatment. Following the consent process, stroke patients will be randomised to receive either IPC or geko device. Both devices will be applied until the patient can walk again without help, or for a maximum of 30 days. A compression Doppler exam of the legs will be conducted after 7 days or at discharge if the patient recovers earlier (optional) and after 14 days (mandatory). At 14 days post-randomisation, a patient questionnaire about the comfort of the device, as well as additional health information will be collected. At 30 days after randomisation, additional information about symptomatic DVTs or PEs etc., will be collected from the participant's medical notes. A final follow-up will then be conducted over the phone after 90 days to find out about the patient's recovery, health, mobility and quality of life.

03

Conditions studied

  • Stroke, Acute
  • Venous Thromboembolism
  • Deep Vein Thrombosis
  • Pulmonary Embolism

Keywords

  • geko
  • intermittent pneumatic compression
  • Stroke, Acute
  • Venous Thromboembolism
  • Pulmonary Embolism
  • DVT prophylaxis
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Age 18 years or older
  2. Clinical diagnosis of acute stroke (WHO criteria)
  3. Within 36 hours of symptom onset
  4. Not able to get up from a chair/out of bed and walk to the toilet without the help of another person

Exclusion criteria

Exclusion Criteria:

  1. Inability to gain consent from the patient, or a declaration from a Personal Consultee or Nominated Consultee
  2. Unwitnessed onset with a long lie on the floor before admission
  3. Clinically apparent deep vein thrombosis at screening
  4. Patient is expected to require palliative care within 14 days
  5. Patient does not live in the local catchment area and is expected to be transferred to their local hospital for on-going care.
  6. Patient has recently been involved in or is currently involved in a clinical trial for either a medical device or medicinal product, within the past 3 months, with the exception: if co-enrolment is not considered to impact adverse events or outcomes in the opinion of the Chief Investigator. (A live document containing a list of approved studies will be included in a reference document made available to all study sites and available upon request)
  7. for the use of the geko™ device:

    • Allergy to hydrogel constituents
  8. Contraindications to IPC:

    • Severe peripheral vascular disease
    • Large leg ulcers requiring extensive bandaging (small ulcers or skin breaks with flat coverings are not an exclusion)
    • Severe oedema
    • Leg deformities making appropriate fitting impossible
  9. Uncontrolled congestive cardiac failure
  10. Pregnancy
  11. Single or double leg amputations
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

05

Study design

Phase
Not applicable
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
1,200 participants (estimated)

Study arms

  • Experimental
    geko™ T-3 interventional

    The geko™ device will be applied bilaterally as soon as possible after randomisation and each geko™ device will be used to deliver one 24-hour dose. Devices will be worn continuously and changed every 24 hours. Treatment will be continued for a maximum of 30 days or until patient recovers mobility, or is discharged into the community, or meet other defined criteria, whichever comes earlier.

    Device: geko™ device

  • No intervention
    Intermittent Pneumatic Compression (IPC)

    Control treatment will be IPC using NHS approved devices as used for standard clinical care. They will be applied to both legs as soon as possible after randomisation. They will not be changed unless damaged or soiled. Treatment will be continued for a maximum of 30 days or until patient recovers mobility, or is discharged into the community, or meet other defined criteria, whichever comes earlier.

Interventions

  • Devicegeko™ device

    Neuromuscular electrical stimulation of the peroneal nerve

    Also known as: geko, NMES

06

What researchers measure

Primary outcomes

  1. Frequency of any symptomatic or asymptomatic Deep Vein Thrombosis (DVT) in the calf, popliteal or femoral veins or any Pulmonary Embolism (PE).

    Determine the number of patients diagnosed to have a VTE (DVT and PE), comparing the two groups: geko™ device compared to IPC standard of care. Asymptomatic DVT will be diagnosed using above knee compression Doppler (Compression Duplex Ultrasound) and PE will be diagnosed using ventilation perfusion scan or by computer tomography pulmonary angiogram (CTPA). Compression Dopplers will be conducted any time there is a clinical suspicion of DVT. Above knee compression Dopplers will be conducted at 7 days and 14 days after randomisation, or at patient discharge if patient recovers earlier than 7 d and 14 days post-randomisation.

    Time frame: From randomisation to 30 days. Compression Dopplers at 7 d (optional) and 14 d after randomisation.

Secondary outcomes

  1. Device Acceptability

    To assess patient tolerability of the geko™ device compared to IPC standard of care, a device acceptability questionnaire will be utilised, which includes questions on discomfort, sleep quality, number of times the device is checked and not in place/not working effectively and number of days the device was worn. Answers to each question will be summarised.

    Time frame: At 14 days after randomisation

  2. Device effectiveness

    Determine frequency of patient death for any cause, confirmed fatal or non-fatal PE, any (symptomatic or asymptomatic) above knee DVT, any (symptomatic or asymptomatic) popliteal or femoral vein DVT or symptomatic calf vein DVT, and combination of these outcomes. The frequency will be compared between the two groups: geko™ device compared to IPC standard of care.

    Time frame: At 30 days after randomisation

  3. Leg pain level using a Numerical Rating Scale (NRS) score

    Assessing pain levels using a Numerical Rating Scale (NRS) score: a line from 0 - 10, where 0 means no pain and 10 is the worst possible pain.

    Time frame: At 90 days after randomisation

  4. Disability using the modified Rankin score

    The modified Rankin score will be used to measure Neurologic Disability. This is a 7-level, clinician reported measure of global disability with possible scores ranging from 0 to 6, where 0 represents "no symptoms at all", 5 represents "severe disability; bedridden, incontinent and requiring constant nursing care and attention" and 6 indicates patient death.

    Time frame: At 90 days after randomisation

  5. Health related quality of life using EQ-5D-5L

    A validated patient reported outcome measure, the first part of the EQ-5D-5L score is a simple 5-level questionnaire: patient mobility, self-care, usual activities, pain/discomfort, anxiety/depression. Each question has five response levels from no problems (Level 1) to extreme problems (Level 5). The second part of the EQ-5D is an EQ VAS to record the patient's self-rated health scored on a 0 - 100 scale representing "the worst..." and "the best health you can imagine", respectively.

    Time frame: At 90 days after randomisation

  6. Patient survival

    Death from any cause will be recorded, comparing the two groups: geko™ device compared to IPC standard of care.

    Time frame: At 90 days after randomisation

  7. Assessment of any symptomatic or asymptomatic DVT or PE

    Determine the frequency of VTE (DVT and PE), comparing the two groups: geko™ device compared to IPC standard of care.

    Time frame: At 90 days after randomisation

  8. Adverse Event Assessments

    Incidence of Adverse Events in each group will be recorded.

    Time frame: Up to 30 days after randomisation or discharge, whichever comes earlier

  9. NIH Stroke Scale/Score (NIHSS)

    The NIHSS scores areas such as level of consciousness, vision, sensation, movement, speech and language with a minimum score of 0 representing no stroke, and 21-42 points representing severe stroke. NIHSS will be compared between the two groups: geko™ device compared to IPC standard of care.

    Time frame: At 7 days (optional/if practical) and 14 days after randomisation

07

Study locations

17 of 18 sites recruiting
  • West Suffolk Hospital
    Bury St Edmunds, Suffolk IP29 5DN, United Kingdom
    Recruiting
    • Lisa Wood · Contact
    • Catherine Durrant · Contact
    • Abul Azim, Dr · Principal investigator
  • Royal United Hospital
    Bath, BA1 3NG, United Kingdom
    Recruiting
  • Queen Elizabeth Hospital Birmingham
    Birmingham, B15 2GW, United Kingdom
    Recruiting
    • Scott Luxmore-Brown · Contact
    • Mark Willmot, Dr · Principal investigator
  • The Royal Bournemouth Hospital
    Bournemouth, BH7 7DW, United Kingdom
    Recruiting
    • Dhanya Babu · Contact+44(0)300 019 5073
    • Kamy Thavanesan, Dr · Principal investigator
  • Fairfield General Hospital
    Bury, BL9 7TD, United Kingdom
    Recruiting
    • Pamela Bradley · Contact
    • Narayanamoorthi Saravanan, Dr · Principal investigator
  • Addenbrooke's Hospital
    Cambridge, CB2 0QQ, United Kingdom
    Recruiting
    • Alex McGovern · Contact
    • Smriti Agarwal, Dr · Principal investigator
  • Kent and Canterbury Hospital
    Canterbury, CT1 3NG, United Kingdom
    Not yet recruiting
    • Gemma Hector · Contact
    • Rami Abdallah, Dr · Principal investigator
  • Countess of Chester Hospital
    Chester, CH2 1UL, United Kingdom
    Recruiting
    • Sherin Sabu · Contact
    • Kausik Chatterjee, Dr · Principal investigator
  • Whiston Hospital
    Liverpool, L35 5DR, United Kingdom
    Recruiting
    • Coleen Ditchfield · Contact
    • Sunanda Mavinamane, Dr · Principal investigator
  • Northwick Park Hospital
    London, HA1 3UJ, United Kingdom
    Recruiting
    • Parvathy Gopi · Contact+44(0)2088695550
    • Aravinth Sivagnanaratnam, Dr · Principal investigator
  • King's College Hospital
    London, SE5 9RS, United Kingdom
    Recruiting
    • Con Tibajia · Contact+44(0)2032997506
    • Yee-Haur Mah, Dr · Principal investigator
  • Milton Keynes University Hospital
    Milton Keynes, MK6 5LD, United Kingdom
    Recruiting
    • Cheryl Padilla-Harris · Contact
    • Yaw Duodu, Dr · Principal investigator
  • Queen's Medical Centre
    Nottingham, NG7 2UH, United Kingdom
    Recruiting
    • Amanda Hedstrom · Contact+44(0)1158231807
    • Ashit Shetty, Dr · Principal investigator
  • Salford Royal Hospital
    Salford, M6 8HD, United Kingdom
    Recruiting
    • Reece Doonan · Contact+44(0)161 206 2188
    • Kirsty Ward, Dr · Principal investigator
  • Stepping Hill Hospital
    Stockport, SK2 7JE, United Kingdom
    Recruiting
    • Seethalekshmi Vikramadhithyan · Contact+44(0)161 419 5893
    • Clare Tibke · Contact
    • Georgina Williams · Principal investigator
  • Royal Stoke University Hospital
    Stoke-on-Trent, ST4 6QG, United Kingdom
    Recruiting
    • Surabhi Saxena · Contact+44(0)1782671988
    • Phillip Ferdinand, Dr · Principal investigator
  • New Cross Hospital
    Wolverhampton, WV10 0QP, United Kingdom
    Recruiting
    • Tegan Taylor · Contact+44(0)1902307999
    • Nasar Ahmad, Dr · Principal investigator
  • Yeovil Hospital
    Yeovil, BA21 4AT, United Kingdom
    Recruiting
    • Alfonso Tanate · Contact+44(0)193538 4297
    • Khalid Rashed, Dr · Principal investigator
08

References and documents

Individual participant data

Plan to share: No

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Jul 2023 (actual). Primary completion is estimated for Apr 2025, 21 months after the start.

Of 144 industry-sponsored interventional studies with no phase under Stroke, half reached primary completion within 24 months of starting (the median), counting those still running; a quarter within 11 and three quarters within 43. This study's planned 21 months is below that.

Counting every sponsor, half of 3,261 studies reached it within 23 months; a quarter within 10 and three quarters within 46.

How these figures are worked out, and which studies are left out of them.

Registered
Jul 21, 2022
First posted
Jul 27, 2022
StartActual
Jul 6, 2023
Primary completionEst.
Apr 30, 2025
CompletionEst.
Jun 30, 2025
Last update
Mar 4, 2025
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Mar 4, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05476913
Lead sponsor
Firstkind Ltd
Collaborators
National Institute for Health Research, United Kingdom, Keele University, University Hospitals of North Midlands NHS Trust, University of California, Bournemouth University
Responsible party
Sponsor
First posted
Jul 27, 2022
Start date
Jul 6, 2023
Primary completion
Apr 30, 2025 (estimated)
Completion
Jun 30, 2025 (estimated)
Last update
Mar 4, 2025

Study contacts

Kieron Day, DPhil
Contact
Kieron.Day@firstkindmedical.com
+44 (0) 7921 106253
Wing To, PhD
Contact
wing.to@firstkindmedical.com
+44 (0) 7827 612109
Christine Roffe, MD FRCP FESO
principal investigator · Keele University, University Hospitals of North Midlands NHS Trust

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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