The posterior tibial artery is the direct continuation of the popliteal artery, branching off below the popliteal muscle and running downward between the superficial and deep layers of the lower leg flexors, passing behind the internal malleolus and through the deep surface of the flexor retinaculum into the sole, dividing into the medial and lateral plantar arteries as the two terminal branches. The posterior tibial artery mainly nourishes the tibia and the posterior muscles of the lower leg. In addition, it also gives off the following branches:
① Peroneal artery: It is the largest branch of the posterior tibial artery. It branches off 3 centimeters below the origin of the posterior tibial artery, first running obliquely downward and outward on the superficial surface of the posterior tibial muscle, then descending along the medial margin of the fibula and the deep surface of the flexor hallucis longus, passing through the deep surface of the flexor retinaculum into the sole, and dividing into the medial and lateral plantar arteries as the terminal branches. The posterior tibial artery mainly nourishes the tibia and the posterior muscles of the lower leg. In addition, it also gives off the following branches:
② Posterior malleolar artery: Originates from the posterior tibial artery behind the internal malleolus and nourishes the ankle joint.
Posterior tibial artery injury should be operated on as soon as possible after the injury, and the patient needs to rest and pay attention to health and exercise recovery after surgery.