The dorsal decubitus reduction consists in placing the patient in the dorsal position and achieving reduction by traction maneuvers on the luxated upper limb. This maneuver generally requires procedural sedation. A mild traction of the traumatized limb in the axis is performed, with slight external rotation and progressive abduction. In the absence of reduction at this stage, this gesture is completed by a flexion adduction of the limb. A counterweight is then made by a rolled sheet and passed under the armpit of the patient.

The ventral decubitus reduction consists in placing the patient in the ventral position. The luxated limb is positioned in pendulum and the line of contact with the stretcher must pass through the mid-clavicular line. The humeral head is brought to the scapula.

Two reduction techniques are compared: dorsal decubitus and ventral decubitus reduction. The dorsal decubitus reduction consists in placing the patient in the dorsal position and achieving reduction by traction maneuvers on the luxated upper limb. This maneuver generally requires procedural sedation. A mild traction of the traumatized limb in the axis is performed, with slight external rotation and progressive abduction. In the absence of reduction at this stage, this gesture is completed by a flexion adduction of the limb. A counterweight is then made by a rolled sheet and passed under the armpit of the patient.

The ventral decubitus reduction consists in placing the patient in the ventral position. The luxated limb is positioned in pendulum and the line of contact with the stretcher must pass through the mid-clavicular line. The humeral head is brought to the scapula.

The primary endpoint is the reduction time in minutes from inclusion of the patient after prior confirmation of the clinical and radiological diagnosis to the observed reduction.

Failure rate of the ventral decubitus technique compared to the dorsal decubitus technique