Pelvic External Fixator is suitable for patients with anterior pelvic ring fracture, pelvic fracture and dislocation combined with multiple fractures, hemorrhagic shock, visceral injury, and pelvic fracture with open injury and multiple injuries of the extremities. It can also be temporarily fixed,which is Lower limb External Fixation.
Our pelvic external fixators in orthopaedics is mainly divided into three types:
Pelvic fragment External Fixator type A - three section type
Pelvic fragment external fixator type B - two section type
Pelvic fragment external fixator type C - combination three
All of them use 4pcs HBφ6*150mm bone screws, and the main matching instruments are 6mm hex wrench and 6mm screw driver.
The orthopedic surgery procedures for Pelvic External Fixation
1. Continuous epidural anesthesia or general anesthesia with the patient in the supine position;
2. The skin incision started under the anterior superior iliac spine to the anterior inferior iliac spine about 3-4cm, and was bluntly separated to the bone surface to avoid damage to the lateral femoral cutaneous nerve;
3. The first screw was inserted through the anterior inferior iliac spine (1cm above the acetabulum).
4. Inserting Kirschner wires on both sides of the pelvic wall to guide the direction of needle insertion;
5. The screw tail is tilted 30° from the vertical operating table to the foot side and the lateral side to avoid damage to the acetabulum;
6. Use a hammer to knock the screw into about 1cm, screw in the screw, without trying to change the direction, let the screw enter the pelvic wall;
7. The second screw was placed 2cm above the anterior inferior iliac spine parallel to the first screw in the same way as the first screw.
8. After the pelvic wall screws on both sides are placed, the pelvic bracket is installed.
9. The distance between the bracket and the skin is about 3-4cm, and the CAM at the ball joint and chain connection is relaxed;
10. Reduction under fluoroscopy. After satisfactory reduction, the locking ball joint and chain locking nail CAM were tightened, and the external fixator was assembled for trapezoidal fixation.
The application of these large fragment External Fixation can reduce the pelvic ring, reduce the pelvic volume, reduce retroperitoneal volume and reduce bleeding. It can reduce the activity of the fracture site and effectively promote blood coagulation. The abdominal wall plays the role of a tension band on the iliac wing of the unstable pelvic ring. After exploratory laparotomy, this tension band will be destroyed and the stability of the pelvis will be further reduced.
