D.**Motor-sparing blocks**:

Due to associated motor weakness with the techniques mentioned above, further leading to the risk of falls, delayed mobility, and delayed discharge, the following alternatives (**Figure 8**) can be considered suitable for ERAS protocols.

#### **Figure 8.**

*Regional analgesia option for anterior and posterior knee pain. (FTB: Femoral triangle block, ACB: Adductor canal block, DSB: Dual subsartorial block, LIA: Local infiltration analgesia, iPACK: Infiltration between popliteal artery and capsule of knee joint).*

> I.**Subsartorial blocks**: For all the blocks in the thigh for knee surgeries, the sartorius muscle is a familiar muscular landmark in the sonoanatomy. The LA solution is deposited below the sartorius muscle during these blocks, hence the name "subsartorial blocks [37, 38]." The subsartorial blocks include femoral triangle block, adductor canal block, and dual subsartorial block (**Figure 9**).
