“…Later on, it has been used in elderly and paediatric patients and even in fragile co-morbid patients (Luftig et al, 2020 ; Yu et al, 2019 ; Ince et al, 2020 ; Santos et al, 2019 ; Shankar et al, 2020 ; Aksu et al, 2020a ; Orozco et al, 2019 ; Wyatt et al, 2020a , b ; Ince & Kilicaslan, 2020 ; Fusco et al, 2020a , b ; Romero et al, 2019 ; Ahiskalioglu et al, 2020a , b ; Wyatt et al, 2020a , b ; Wolf, 2019 ; Singh, 2020 ; Thallaj, 2019 ; Fusco et al, 2020a , b ; Jaramillo et al, 2020 ). Perioperatively, it has been used alone or in combination with general and other regional techniques as an analgesic or anaesthetic technique in open and arthroscopic hip surgery, hip positioning, acetabular fracture, pelvic fractures, surgery of medial thigh, vein ligation and stripping surgery, in the prevention of adductor muscle spasm during TURBT, and during the management of the acute phase of opioid- resistant hip vaso-occlusive crisis (Luftig et al, 2020 ; Shankar et al, 2020 ; Bilal et al, 2020 ; Orozco et al, 2019 ; Acharya & Lamsal, 2020 ; Aydin et al, 2020 ; Wyatt et al, 2020a , b ; Sandri et al, 2020 ; Ayub et al, 2020 ; Ahiskalioglu et al, 2020a ; Ahiskalioglu et al, 2020b ; Prado-Kittel et al, 2020 ; Orozco et al, 2020 ; Alrefaey & Abouelela, 2020 ; Sahoo et al, 2020 ). Its successful use for postoperative analgesia, both with a single injection and continuous infusion, has also been reported (Fusco et al, 2019 ; Aksu et al, 2020a ; Roy et al, 2019 ; Casas Reza et al, 2020 ; Mysore et al, 2020 ; Thallaj, 2019 ).…”