Improving Lower Limb Blood Flow in Healthy Adult Volunteers

NCT01981733 | Completed Early Phase 1

• 1 other identifier: THRIVE-1
• Study Type: interventional
• Target: 50
• Locations: 1 country
• Sites: 1

Brief Summary

The THRIVE-1 study will examine novel methods for enhancing blood flow in the lower limb using electrical stimulation. Increases in lower limb blood flow improve venous return and thereby reduce venous stasis. Since stasis is one of the compounding factors in the development of deep vein thrombosis, the risk of developing thrombosis should theoretically be proportionally reduced. This technique may prove to be a useful tool in preventing and reducing the incidence of deep vein thrombosis in both medical and surgical patients together with passengers undertaking significant duration travel (as travel - related deep vein thrombosis is not exclusively related to flying).

Conditions

Deep Vein Thrombosis

Keywords

Deep Vein Thrombosis

Outcome Measures

Primary Outcomes (1)

• Changes in blood flow and volume, together with microcirculatory velocity were measured

  Changes in blood flow and volume, together with microcirculatory velocity were measured using laser Doppler flowmetry (Laser Doppler Perfusion \& Temperature Monitor DRT4; Moor Instruments Ltd, UK) and colour flow duplex ultrasound (Philips IU22; Philips Healthcare, USA).

  30 mins with 10 min washouts

Study Arms (1)

Device

EXPERIMENTAL

Device: geko

Interventions

geko DEVICE

The geko is a neuromuscular stimulator device, which when applied stimulates the common peroneal nerve

Also known as: geko TM

Device

Eligibility Criteria

• Age: 18 Years - 65 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Be in good general health and fitness.
• Aged between 18 and 65 years.
• Free of significant abnormal findings as determined by medical history (specifically an absence of DVT or haematological disorders or indications), screening physical examination, vital signs (sitting blood pressure, sitting pulse rate, sitting respiratory rate and body temperature) and duplex ultrasound within 48 hours prior to commencement of the each study phase.
• BMI between 18 and 34
• No history or signs of drug abuse (including alcohol), licit or illicit.
• Has not to used any medications (prescribed or over-the-counter including herbal remedies) judged to be significant by the Principal Investigator during the thirty (30) days preceding the study, and agrees not to use any medications during the course of the study without informing the Research Team.
• Able to understand the Volunteer Information Sheet and signed the written Informed Consent Forms.
• Able and willing to follow the Protocol requirements.

You may not qualify if:

• Any evidence of organ dysfunction, or any clinically significant deviation from normal in the physical determinations.
• History or signs of haematological disorders (especially in relation to clotting or coagulation or previous Deep or superficial vein thrombosis/pulmonary embolism).
• Peripheral arterial disease (ABPI \< 0.9), varicose veins or lower limb ulceration.
• Musculoskeletal disorders (such as pain during exercise of lower limb).
• Recent surgery (such as abdominal, gynaecological, hip knee replacement).
• Recent trauma to lower limb.
• Chronic Obesity (BMI Index \>34).
• Pregnancy.
• Any Medication judged to be significant by the Principal Investigator (such as anticoagulants, agents with significant vasoactive activity, Oestrogen pill, 'morning-after pill' or HRT).
• Tobacco consumption
• History of disorders of the gastrointestinal, hepatic, renal, cardiovascular, endocrine, neurological, dermatological, rheumatologic, metabolic (including diabetes), psychiatric, haematological (especially in relation to clotting or coagulation), or systemic disease judged to be significant.
• A pulse rate of less than 50 beats/minute, a sitting systolic blood pressure \>160 or \<80 mmHg and/or a sitting diastolic pressure of \>90 or \<60 mmHg.
• Any significant illness during the four (4) weeks preceding the screening period of the study.
• Any contraindication to blood sampling.
• Donation of blood during the eight (8) weeks preceding the screening period of the study or during the investigation.

Sponsors & Collaborators

• Queen Mary University of London: lead

Study Sites (1)

St. Bartholomew's Hospital

London, EC1A 7BE, United Kingdom

Location

MeSH Terms

Conditions

Venous Thrombosis

Condition Hierarchy (Ancestors)

Thrombosis; Embolism and Thrombosis; Vascular Diseases; Cardiovascular Diseases

Study Officials

• Arthur Tucker, BSc PhD

  St. Bartholomew's Hospital

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: early phase 1
• Masking: NONE
• Purpose: BASIC SCIENCE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: November 5, 2013
• First Posted: November 11, 2013
• Study Start: March 1, 2005
• Primary Completion: April 1, 2012
• Last Updated: November 11, 2013

Record last verified: 2013-11

Locations

GB (1)