Peripheral Artery DiseaseNCT03547817
Intermittent Negative Pressure to Improve Blood Flow in Patients With Peripheral Artery Disease: Optimal Pulse Pressure Regime
A study testing Intermittent negative pressure device in people with Peripheral Artery Disease and Intermittent Claudication, run by Oslo University Hospital at 1 site in Norway.
Trial summary
Recent studies have shown that applying intermittent negative pressure (INP) with short negative pressure (-40 mmHg) pulses to the lower extremities increase arterial blood flow velocity and skin blood flow. Read more about this study
- Who is it for?
- Ages 18 to 96 years
- Conditions the study is for
- Peripheral Artery Disease, Intermittent Claudication, Lower Extremity Claudication
- What is being tested?
- Intermittent negative pressure device
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 16 participants
- Where
- 1 siteNorway
- Study dates
- 15 May 2018to 31 Jan 2019
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 96 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Diagnosed peripheral artery disease
- Ankle-Brachial Index <0.9
Who cannot join
- Incapable to make an informed consent
- Diagnosis of severe psychiatric disease
- Severe heart disease such as unstable angina pectoris, severe heart failure (NYHA IV), severe valve failure
- Systemic infection
- Use of vasoactive substances
Trial locations and contacts
1 site in 1 country.
Norway1 site
Department of Vascular diseases, Oslo University Hosptital, Aker
Oslo, 0586
About this study
Official title: Intermittent Negative Pressure to Improve Blood Flow in Patients With Peripheral Artery Disease. An Experimental Study to Investigate the Optimal Pulse Pressure Regime to Improve Blood Flow.
Recent studies have shown that applying intermittent negative pressure (INP) with short negative pressure (-40 mmHg) pulses to the lower extremities increase arterial blood flow velocity and skin blood flow. However, the optimal magnitude of negative pressure to improve blood flow is not known, and needs further investigation. Peripheral arterial blood flow velocity, skin blood flow and skin temperature in the foot will be recorded at different levels of oscillating negative pressure to identify a pressure range which is practically, while at the same time induce clinically relevant changes in blood flow parameters. Heart rate and blood pressure will be recorded to monitor the effects on the central circulation.
Read the detailed description
Cross sectional study design. The equipment for physiological measurements will be attached to the patient, and the foot will then be placed in the pressure chamber. The device induces pulses of 10 sec negative pressure, and 7 sec of atmospheric pressure. Pressure levels of 0 mmHg, -10mmHg, -20 mmHg, -40 mmHg and -60 mmHg will be tested.
Patients will be recruited from the out-patient clinic at Department of Vascular Surgery, Oslo University Hospital, Aker.
Inclusion criteria:
Diagnosed peripheral artery disease (PAD), Ankle-Brachial Index <0.9 Outcome measures:
Arterial blood flow: Ultrasound Doppler from peripheral arteries in the foot.
Skin blood flow: Laser Doppler to measure acral skin blood perfusion.
Skin temperature
Systemic blood pressure: Finger arterial pressure will continuously be acquired by a photoplethysmographic pressure recording device (Finometer).
Ankle brachial index
Pressure recordings inside the pressure chamber: Continuously monitoring of pressure within the pressure chamber using a digital differential manometer.
- Being tested
- Intermittent negative pressure device
- Medical subject headings
- Peripheral Arterial Disease, Intermittent Claudication
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Intermittent negative pressure deviceDevice
Pressure levels of 0 mmHg, -10 mmHg, -20 mmHg, -40 mmHg and -60 mmHg will be tested, with washout periods of 5 minutes between the different pressure levels
| Study group | Role | What they receive |
|---|---|---|
| Optimal negative pulse pressure regime | Experimental | The equipment for physiological measurements will be attached to the patient, and the foot will then be placed in the pressure chamber of the intermittent negative pressure device. The device induces pulses of 10 sec negative pressure, and 7 sec of atmospheric pressure. Pressure levels of 0 mmHg, -10 mmHg, -20 mmHg, -40 mmHg and -60 mmHg will be tested, with washout periods of 5 minutes between the different pressure levels. The order of the different negative pressure levels will be randomized to avoid causal interference. Receives: Device: Intermittent negative pressure device |
What is being measured
The primary outcome is the main question the study is designed to answer.
Arterial blood flow
Continuously Ultrasound Doppler measurements of the dorsalis pedis artery or tibialis posterior artery to monitor changes in arterial blood flow during 5 min sequences of intermittent negative pressure treatment. Pressure levels of 0, -10 mmHg, -20 mmHg, -40 mmHg and -60 mmHg will be tested. Systolic pressures in the arm and the ankle will be assessed before the intervention to describe the patients severity of disease.
Measured: At time of intervention
Secondary outcomes (1)
Skin blood flow
Continuously Laser Doppler measurements from the pulp of the first toe to monitor changes in acral skin perfusion during 5 min sequences of intermittent negative pressure treatment. Pressure levels of 0, -10 mmHg, -20 mmHg, -40 mmHg and -60 mmHg will be tested.
Measured: At time of intervention
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted6 Jun 2018
- Study start15 May 2018
- Primary completion30 Sep 2018
- Study completion31 Jan 2019
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Peripheral Artery DiseaseStudies of the same condition, open and under way.
- More trials run by Oslo University HospitalThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Basic science
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 16 participants (actual)
Sponsor and investigators
- Lead sponsor
- Oslo University Hospital
- Sponsor type
- University, hospital or other
- Collaborators
- Otivio AS
- Responsible party
- Principal investigator, Jonny Hisdal, Oslo University Hospital
- Investigators
- Jonny Hisdal, PhD, Principal investigator, Department of Vascular diseases, Oslo University Hospital, Aker
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03547817
- Sponsor's protocol ID
- SD0321063
- Status last verified
- Dec 2019
- First submitted
- 22 May 2018
- Last updated
- 4 Dec 2019
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 4 Dec 2019. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Intermittent Negative Pressure to Improve Blood Flow in Patients With Peripheral Artery Disease. An Experimental Study to Investigate the Optimal Pulse Pressure Regime to Improve Blood Flow.
- ClinicalTrials.gov ID
- NCT03547817
- Acronym / sponsor ID
- SD0321063
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 16 participants (actual)
- Lead sponsor
- Oslo University HospitalUniversity, hospital or other
- Collaborators
- Otivio AS
- Study start
- 15 May 2018 (actual)
- Primary completion
- 30 Sep 2018 (actual)
- Study completion
- 31 Jan 2019 (actual)
- First posted
- 6 Jun 2018 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Recent studies have shown that applying intermittent negative pressure (INP) with short negative pressure (-40 mmHg) pulses to the lower extremities increase arterial blood flow velocity and skin blood flow. However, the optimal magnitude of negative pressure to improve blood flow is not known, and needs further investigation. Peripheral arterial blood flow velocity, skin blood flow and skin temperature in the foot will be recorded at different levels of oscillating negative pressure to identify a pressure range which is practically, while at the same time induce clinically relevant changes in blood flow parameters. Heart rate and blood pressure will be recorded to monitor the effects on the central circulation.
Detailed description
Cross sectional study design. The equipment for physiological measurements will be attached to the patient, and the foot will then be placed in the pressure chamber. The device induces pulses of 10 sec negative pressure, and 7 sec of atmospheric pressure. Pressure levels of 0 mmHg, -10mmHg, -20 mmHg, -40 mmHg and -60 mmHg will be tested.
Patients will be recruited from the out-patient clinic at Department of Vascular Surgery, Oslo University Hospital, Aker.
Inclusion criteria:
Diagnosed peripheral artery disease (PAD), Ankle-Brachial Index <0.9 Outcome measures:
Arterial blood flow: Ultrasound Doppler from peripheral arteries in the foot.
Skin blood flow: Laser Doppler to measure acral skin blood perfusion.
Skin temperature
Systemic blood pressure: Finger arterial pressure will continuously be acquired by a photoplethysmographic pressure recording device (Finometer).
Ankle brachial index
Pressure recordings inside the pressure chamber: Continuously monitoring of pressure within the pressure chamber using a digital differential manometer.
Study design
- Primary purpose
- Basic science
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Optimal negative pulse pressure regime | Experimental | Device: Intermittent negative pressure deviceThe equipment for physiological measurements will be attached to the patient, and the foot will then be placed in the pressure chamber of the intermittent negative pressure device. The device induces pulses of 10 sec negative pressure, and 7 sec of atmospheric pressure. Pressure levels of 0 mmHg, -10 mmHg, -20 mmHg, -40 mmHg and -60 mmHg will be tested, with washout periods of 5 minutes between the different pressure levels. The order of the different negative pressure levels will be randomized to avoid causal interference. |
Who may qualify
- Ages
- 18 to 96 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (2 listed)
- Diagnosed peripheral artery disease
- Ankle-Brachial Index <0.9
Key exclusion criteria (5 listed)
- Incapable to make an informed consent
- Diagnosis of severe psychiatric disease
- Severe heart disease such as unstable angina pectoris, severe heart failure (NYHA IV), severe valve failure
- Systemic infection
- Use of vasoactive substances
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Intermittent negative pressure devicePressure levels of 0 mmHg, -10 mmHg, -20 mmHg, -40 mmHg and -60 mmHg will be tested, with washout periods of 5 minutes between the different pressure levels | Device | Optimal negative pulse pressure regime |
Primary outcome
Arterial blood flow
Time frame: At time of intervention
Continuously Ultrasound Doppler measurements of the dorsalis pedis artery or tibialis posterior artery to monitor changes in arterial blood flow during 5 min sequences of intermittent negative pressure treatment. Pressure levels of 0, -10 mmHg, -20 mmHg, -40 mmHg and -60 mmHg will be tested. Systolic pressures in the arm and the ankle will be assessed before the intervention to describe the patients severity of disease.
1 secondary outcome
Skin blood flow
Time frame: At time of intervention
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 4 Dec 2019.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Jonny Hisdal, PhD principal investigator
Department of Vascular diseases, Oslo University Hospital, Aker
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Intermittent negative pressure device in people with Peripheral Artery Disease and Intermittent Claudication, run by Oslo University Hospital at 1 site in Norway.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 4 Dec 2019. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Norway. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Arterial blood flow (time frame: At time of intervention). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 4 Dec 2019.