Hip fracture remains a common orthopedic emergent condition which usually requires surgical treatment, although the incidence of hip fracture has seemed to decrease over the years in countries such as the United States (US). For instance, following up with a cohort over 40 years, a study published in JAMA Internal Medicine in 2020 reported that the age-adjusted incidence of hip fracture decreased by about 4.4% per year [95% confidence interval (CI): 6.8% to 1.9%] between 1970 and 2010 (Swayambunathan et al., 2020). The incidences of hip fracture (per 100,000 person-years) in the 1970s, 1980s, 1990s, and 2000s were 663.4 (95% CI: 356.2 to 1235.5), 741.4 (95% CI: 483.7 to 1136.9), 569.3 (95% CI: 387.9 to 835.6), and 246.4 (95% CI: 144.4 to 420.3), respectively (Swayambunathan et al., 2020).  Femoral nerve block (FNB), a regional anesthetic technique, has been considered as an effective and safe alternative to opioids or other painkillers for the purpose of ....