prone position with the leg fully extended and the foot hanging off the edge of the bed (Fig. 10.3.8A and B). This exposes the tendons at the posterior aspect of the ankle and if needed, a towel can be positioned between the dorsum of the foot and treatment couch to add stability. The AT tendons can be traced in a LAX orientation, by following the gastrocnemius and soleus muscles at the posterior of the calf, down to the musculartendinous junction and then tendon itself as it attaches on to the calcaneum (Fig. 10.3.8C and D). Rotating the transducer 90 degrees the tendon can be assessed in the SAX orientation as well (Fig. 10.3.8E and F). HVI tendon stripping for tendinopathy. PRP injections for degenerative tendon disease with intrasubstance tearing. Prolo injections for retrocalcaneal bursitis. Linear 6e15 mHz. Hockey stick 8e18 mHz. Equipment preparation: Set 2 for HVI tendon stripping. Set 4 for PRP injections. Set 5 for Prolo. Syringe: 10 mL(s) for tendon stripping injections. 3 mL for Prolo injections. Medication: High volume tendon stripping normal saline and 1% lidocaine. Prolo, 2 mL of a 50:50 mixture of 50% dextrose and 1% lidocaine can be used. Needle: 1- to 1.5-inch 25- or 27-gauge needle. Standard/available PRP preparation. In the SAX orientation, the needle can be introduced at 15e20 degrees using an IP technique from the lateral aspect of the ankle. With the bevel facing up, the needle should be aimed for the interface between the tendon sheath and Kager’s fat pad (Fig. 10.3.8I and J). Once in position, a small amount of fluid can be injected to separate the planes and the needle can be re­positioned for the HVI. An OOP view helps define the needle position further. While the solution is being pushed through, the needle can be gently moved proximal and distal to distribute it. If vascularity has been particularly florid, the anterior border of the AT can be gently scraped with the needle tip. For PRP injections, the AT can be viewed in the SAX and the needle can be introduced IP from the dorsal aspect at 15e20 degrees directly into the tendon (Fig. 10.3.8G and H). Alternatively, an IP SAX approach can also be used with the needle again guided into the tendon itself (Fig. 10.3.8I and K). In both positions, the solution can be delivered using a fenestration technique. For prolo injections into the retrocalcaneal bursa, a SAX orientation can be used with the needle inserted IP into the space between the tendon and calcaneum where the bursa is found.