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The physiological effect of dangling on lower limb free flap perfusion

The physiological effect of dangling on patients undergoing lower limb free flap perfusion

Status
Not yet recruiting
Phases
Unknown
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12613001344785
Acronym
N/A
Enrollment
52
Registered
2013-12-09
Start date
2014-01-01
Completion date
2014-12-31
Last updated
2020-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Brief summary

INTRODUCTION Dependency of the lower limb following free flap reconstruction needs to be gradually introduced due to the risk of edema and consequent effects on flap microcirculation. It is well established that these flaps must undergo graduated periods of wrapping and dangling before progressing to full dependency. Objective evidence for initiation of post-operative dangling following lower limb free flap reconstruction is limited and there is significant variability in the protocols of individual centres and surgeons. OBJECTIVE The goal of this study is to determine the physiological effect of dangling on lower limb free flap perfusion in order to determine an evidence-based protocol. METHODS Randomised controlled trial of patients from Royal Adelaide Hospital who have undergone lower limb free flap reconstruction. Group 1 will begin dangling on day 3, whilst group 2 will begin dangling on day 7. All patients will have their flap monitored by clinical assessment, implantable venous doppler and transcutaneous oxygen saturation (St02%). CONCLUSION The results of this study will be statistically analysed and summarised, will be presented at a plastic surgery conference, and will be submitted for publication in a peer-reviewed journal.

Interventions

Randomised controlled trial of patients from Royal Adelaide Hospital who have undergone lower limb free flap reconstruction. Group 1 (intervention) will begin dangling on day 3, whilst group 2 (control) will begin dangling on day 7. All patients will have their flap monitored by clinical assessment, implantable venous doppler and transcutaneous oxygen saturation (St02%). The dangling protocol involves wrapping the lower limb with an elasticated compression bandage extending from the toes to th

Randomised controlled trial of patients from Royal Adelaide Hospital who have undergone lower limb free flap reconstruction. Group 1 (intervention) will begin dangling on day 3, whilst group 2 (control) will begin dangling on day 7. All patients will have their flap monitored by clinical assessment, implantable venous doppler and transcutaneous oxygen saturation (St02%). The dangling protocol involves wrapping the lower limb with an elasticated compression bandage extending from the toes to the knee. The patient will then be seated on the edge of the bed with your knee joint bent at 90 degrees and the heel dangled unsupported. The lower limb will be dangled for 5 minutes three times per day on the first day of the protocol. The duration of dangling will be doubled every day for the next five days. Before, during and after the dangling process, we will analyse the blood supply of the flap using clinical assessment, venous Doppler and tissue oximetry.

Sponsors

Royal Adelaide Hospital
Lead SponsorHospital

Study design

Allocation
Randomised controlled trial
Intervention model
Parallel
Primary purpose
Treatment
Masking
Open (masking not used)

Eligibility

Sex/Gender
All
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

male or female, age >18 years lower limb extremity free flap reconstruction

Exclusion criteria

return to theatre for flap salvage those who are unable or unwilling to give informed consent

Outcome results

None listed

Source: ANZCTR · Data processed: Feb 4, 2026