The Plastic, Reconstructive and Aesthetic Surgery department of Montpellier was born out of the Wound and Healing department, the first unit of this type to be created in Europe. The investigators quickly became the national leader in the management of pressure ulcers, especially in people with spinal cord injuries.

Our expertise has evolved over time as well as our surgical techniques for covering ulcers, gradually over time the investigators have gone from " random " flaps to " propeller " flaps, more reliable in terms of vascularization and more logical in terms of force distribution and skin tension.

The investigators found subjectively that the rate of complications was lower for the helical flaps. The investigators therefore seek to confirm this trend through a retrospective study on patients operated on in the department between January 1, 2015 and December 31, 2019.

Inclusion criteria:

• Major Patient
• Patient with trochanteric, ischiatic or sacral pressure ulcer
• Patient who undergone flap surgery for pressure ulcer between January 1st, 2015 and December 31st, 2019

Exclusion criteria:

• Other loss of substance than pressure ulcer
• Combined covering with a random flap and a propeller flap
• Surgical revision of a flap without a new flap

Patients with sacral, trochanteric or ischiatic pressure ulcer

NC