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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT01235286
Other study ID # Kraemer001
Secondary ID
Status Completed
Phase N/A
First received November 4, 2010
Last updated November 4, 2010
Start date September 2010
Est. completion date October 2010

Study information

Verified date November 2010
Source Hannover Medical School
Contact n/a
Is FDA regulated No
Health authority Germany: Ethics Commission
Study type Interventional

Clinical Trial Summary

Background: In plastic and reconstructive surgery, free flaps are routinely used for treatment of soft tissue defects. Treatment strategies aim at reducing or preventing flap necrosis by conditioning tissue tolerance against ischemia. Although previous studies indicate that remote ischemic preconditioning (RIPC) is a systemic phenomenon, only a few studies have focused on the elucidation of its mechanisms of action. Therefore, the aim of this study is to evaluate the microcirculatory effects of remote ischemic preconditioning on a potential free flap location in a human in-vivo setting for the first time.

Conclusion: Remote ischemic preconditioning improves cutaneous tissue oxygen saturation, arterial capillary blood flow and postcapillary venous flow in a remote free flap donor location. To what extent remote preconditioning might ameliorate the reperfusion injury of free flap transplantation, further clinical trials have to evaluate both in the means of microcirculatory assessment and partial or total flap loss as end points of these studies.


Recruitment information / eligibility

Status Completed
Enrollment 27
Est. completion date October 2010
Est. primary completion date October 2010
Accepts healthy volunteers Accepts Healthy Volunteers
Gender Both
Age group 18 Years to 35 Years
Eligibility Inclusion Criteria:

- healthy male and female subjects aged 18 to 35 years

Exclusion Criteria:

- soft tissue inflammation or osteomyelitis, peripheral arterial occlusive disease, vasculitis, chronic kidney or liver disease, cardiac dysfunction, arterial hypotension and any type of vasoactive medication, i.e. ß-blockers, calcium channel blockers, nitroglycerin

Study Design

Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Single Blind (Subject), Primary Purpose: Basic Science


Related Conditions & MeSH terms


Intervention

Procedure:
remote ischemic preconditioning
A standardized location for microcirculatory assessment was determined on the left leg of each participant between the proximal and distal third of a drawn line between the anterior superior iliac spine and the lateral aspect of the Patella. The healthy subjects had to rest before starting data assessment in a horizontal position for 15 minutes. The probe was taped on the left upper leg in a standardized manner after localizing the measuring point. A blood pressure cuff was applied on the contralateral upper arm. Baseline data was assessed over 5 minutes before starting remote ischemia. Three circles of a five minute ischemia were applied at the contralateral right upper arm at suprasystolic levels. Parameters of microcirculation were assessed continuously over time. Microcirculation during the reperfusion phase was ascertained over 10 minutes after first and second remote ischemia and 15 minutes after the third remote ischemia.

Locations

Country Name City State
Germany Medical School Hannover Hannover

Sponsors (1)

Lead Sponsor Collaborator
Hannover Medical School

Country where clinical trial is conducted

Germany, 

Outcome

Type Measure Description Time frame Safety issue
Primary Change in microcirculation capillary blood flow [arbitrary units AU]
capillary blood velocity [AU]
tissue oxygen saturation [%]
relative postcapillary venous filling pressure [AU]
No
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