Cory Calendine MD on Instagram: "💉 Blocking Joint Pain During #KneeReplacement . IPACK, which stands for “infiltration between the popliteal artery and capsule of the knee,” is an ultrasound-guided nerve block technique that targets posterior knee pain often missed by traditional pain management methods. During the procedure, an anesthesiologist uses high-frequency ultrasound to locate the space between the popliteal artery and posterior knee capsule. A specialized needle is then carefully posi