CPT® Code 0511T

The sinus tarsi is a small anatomical channel located between the talus and calcaneus bones, which are critical components of the ankle joint. This space plays a vital role in stabilizing the ankle by housing various structures that contribute to its function. A sinus tarsi implant is utilized in the treatment of hyper-pronation of the foot, commonly referred to as flexible or mobile flatfoot. This condition involves the improper positioning of the talus bone over the calcaneus bone, leading to instability and discomfort. The implant serves to correct this misalignment by limiting the excessive movement of the talus, a procedure known as subtalar arthroereisis. The process of managing a sinus tarsi implant involves both removal and reinsertion, depending on the patient's condition. Removal may be indicated when a patient experiences significant pain or discomfort in the foot or ankle, necessitating surgical intervention. The surgical technique involves making an incision on the lateral side of the hindfoot to access the sinus tarsi, where the implant is located. The area is carefully debrided to remove any scar tissue, allowing for clear visibility and access to the implant. Once the implant is removed, the procedure may continue with reinsertion, which involves repositioning the talus bone to its correct anatomical location. This is achieved through the use of specialized instruments and techniques, which may vary depending on the type of implant used. The overall goal of these procedures is to restore proper alignment and function to the foot and ankle, alleviating pain and improving mobility for the patient.