MicrocirculationNCT02466594
Impact of Active Thermoregulation on the Microcirculation of Free Flaps
A study testing Hilotherm Clinic® in people with Microcirculation and Thermoregulation, run by Ulf Dornseifer, MD at 1 site in Germany.
Trial summary
This study evaluates the impact of active thermoregulation on free flap microcirculation following free flap transfer. Thermoregulation is performed by passive warming, active warming (water circulation based device) and active cooling. Read more about this study
- Who is it for?
- Ages 18 to 50 yearsHealthy volunteers can take part
- Conditions the study is for
- Microcirculation, Thermoregulation, Free Flap
- What is being tested?
- Hilotherm Clinic®
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 25 participants
- Where
- 1 siteGermany
- Study dates
- Nov 2013to Apr 2015
- 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 50 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- Patients receiving free perforator flaps with a skin island not less than 4x4 cm
Who cannot join
- non-compliance,
- non-consent,
- history of cardiac disease,
- arterial hypo- or hypertension,
- intake of vasoactive drugs,
- peripheral arterial occlusive disease,
- chronic kidney and liver disease,
- vasculitis
Trial locations and contacts
1 site in 1 country.
Germany1 site
Department of Plastic, Reconstructive, Hand and Burn Surgery, Bogenhausen Academic Hospital, Munich 81925, Germany
Munich, Bavaria, 81925
About this study
This study evaluates the impact of active thermoregulation on free flap microcirculation following free flap transfer. Thermoregulation is performed by passive warming, active warming (water circulation based device) and active cooling. Changes in microcirculation are assessed using combined laser Doppler flowmetry and remission spectroscopy.
Read the detailed description
Measurements are conducted at the day of the operation as well as the first three days following the operation. Tissue temperature is assessed by a temperature measurement probe that is placed 8 mm underneath the skin. The microcirculation parameters of free perforator flaps are assessed using combined laser Doppler flowmetry and remission spectroscopy (O2C®). This allows non-invasive measurement of blood flow, capillary venous oxygen saturation and relative postcapillary filling pressure using a fiber optic probe that is placed on the flap surface. Controlled Thermoregulation (between 10 and 38°C) is enabled using a water circulation based system (Hilotherm Clinic®).
- Conditions
- Microcirculation, Thermoregulation, Free Flap
- Being tested
- Hilotherm Clinic®
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Hilotherm Clinic®Device
Controlled Thermoregulation using a water circulation based system (Hilotherm Clinic®). Controlled Thermoregulation with Hilotherm Clinic® - Flap Temperature is altered by passive warming (dressing), active warming (38 C) and active cooling (10 C) each for 60 minutes following free flap transfer in every subject at the day of surgery and the following three days
| Study group | Role | What they receive |
|---|---|---|
| Hilotherm Clinic® | Other | Intervention: Controlled Thermoregulation with Hilotherm Clinic® - Flap Temperature is altered by passive warming (dressing), active warming (38 C) and active cooling (10 C) each for 60 minutes following free flap transfer in every subject at the day of surgery and the following three days Receives: Device: Hilotherm Clinic® |
What is being measured
The primary outcome is the main question the study is designed to answer.
Blood Flow (AU) measured by Doppler flowmetry and remission spectroscopy (Oxygen to See, O2C®, Lea Medizintechnik, Giessen, Germany)
Measured: Measurements were conducted at the day of the operation
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted9 Jun 2015 (estimated)
- Study startNov 2013
- Primary completionApr 2014
- Study completionApr 2015
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for MicrocirculationStudies of the same condition, open and under way.
- 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
- Supportive care
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 25 participants (actual)
Sponsor and investigators
- Lead sponsor
- Ulf Dornseifer, MD
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor-investigator, Ulf Dornseifer, MD, Klinik Bogenhausen
- Investigators
- Ulf Dornseifer, MD, Principal investigator, Department of Plastic, Reconstructive, Hand and Burn Surgery, Bogenhausen Academic Hospital, Munich 81925, Germany
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02466594
- Sponsor's protocol ID
- KBogenhausen
- Status last verified
- Jul 2015
- First submitted
- 25 May 2015
- Last updated
- 7 Jul 2015
- Results posted
- No
- Data monitoring committee
- Yes
Study at a glance
From the registry record, last updated by the sponsor on 7 Jul 2015. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Impact of Active Thermoregulation on the Microcirculation of Free Flaps
- ClinicalTrials.gov ID
- NCT02466594
- Acronym / sponsor ID
- KBogenhausen
- Conditions
- Microcirculation, Thermoregulation, Free Flap
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 25 participants (actual)
- Lead sponsor
- Ulf Dornseifer, MDUniversity, hospital or other
- Study start
- Nov 2013
- Primary completion
- Apr 2014 (actual)
- Study completion
- Apr 2015 (actual)
- First posted
- 9 Jun 2015 (estimated)
- 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.
This study evaluates the impact of active thermoregulation on free flap microcirculation following free flap transfer. Thermoregulation is performed by passive warming, active warming (water circulation based device) and active cooling. Changes in microcirculation are assessed using combined laser Doppler flowmetry and remission spectroscopy.
Detailed description
Measurements are conducted at the day of the operation as well as the first three days following the operation. Tissue temperature is assessed by a temperature measurement probe that is placed 8 mm underneath the skin. The microcirculation parameters of free perforator flaps are assessed using combined laser Doppler flowmetry and remission spectroscopy (O2C®). This allows non-invasive measurement of blood flow, capillary venous oxygen saturation and relative postcapillary filling pressure using a fiber optic probe that is placed on the flap surface. Controlled Thermoregulation (between 10 and 38°C) is enabled using a water circulation based system (Hilotherm Clinic®).
Study design
- Primary purpose
- Supportive care
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Hilotherm Clinic® | Other | Device: Hilotherm Clinic®Intervention: Controlled Thermoregulation with Hilotherm Clinic® - Flap Temperature is altered by passive warming (dressing), active warming (38 C) and active cooling (10 C) each for 60 minutes following free flap transfer in every subject at the day of surgery and the following three days |
Who may qualify
- Ages
- 18 to 50 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (1 listed)
- Patients receiving free perforator flaps with a skin island not less than 4x4 cm
Key exclusion criteria (8 listed)
- non-compliance,
- non-consent,
- history of cardiac disease,
- arterial hypo- or hypertension,
- intake of vasoactive drugs,
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 |
|---|---|---|
| Hilotherm Clinic®Controlled Thermoregulation using a water circulation based system (Hilotherm Clinic®). Controlled Thermoregulation with Hilotherm Clinic® - Flap Temperature is altered by passive warming (dressing), active warming (38 C) and active cooling (10 C) each for 60 minutes following free flap transfer in every subject at the day of surgery and the following three days | Device | Hilotherm Clinic® |
Primary outcome
Blood Flow (AU) measured by Doppler flowmetry and remission spectroscopy (Oxygen to See, O2C®, Lea Medizintechnik, Giessen, Germany)
Time frame: Measurements were conducted at the day of the operation
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 7 Jul 2015.
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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.
Ulf Dornseifer, MD principal investigator
Department of Plastic, Reconstructive, Hand and Burn Surgery, Bogenhausen Academic Hospital, Munich 81925, Germany
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Hilotherm Clinic® in people with Microcirculation and Thermoregulation, run by Ulf Dornseifer, MD at 1 site in Germany.
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 1 inclusion and 8 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 7 Jul 2015. 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 Germany. 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?
Blood Flow (AU) measured by Doppler flowmetry and remission spectroscopy (Oxygen to See, O2C®, Lea Medizintechnik, Giessen, Germany) (time frame: Measurements were conducted at the day of the operation). 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 7 Jul 2015; AzTrials last refreshed its copy on 7 Nov 2026.