Rescue, pre-hospital medical emergency, and a patient transport device which is in the form of a specific immobilisation device (SID) wherein it allows complete en bloc immobilisation of a pelvic area and an affected lower limb of an injured subject in cases in which a femoral neck fracture is suspected, and the device comprises: (i) a rigid guide having a telescopic structure which allows stabilising the pelvic area and perfectly aligning the affected lower limb, and having at its lower distal end a T-shaped ankle band completing said immobilising function of the assembly; (ii) a system for securing comprising a single padded anatomical band or a wing or two sets of padded anatomical bands or wings and wherein each of said padded anatomical bands or wings comprises a longitudinal multi-tunnel system formed by parallel longitudinal seams containing a viscoelastic layer on a rigid laminar endoskeleton that runs parallel to the limb to be immobilised, confers vertical rigidity and horizontal flexibility, and allows fixing the telescopic rigid guide to the body of the injured subject, encircling it, and completing the immobilisation of the pelvic area with both extremities en bloc; (iii) a series of straps / and / with quick fastening / and / which complete the function of the bands or wings / and / into which they are inserted, allowing both opposite ends to remain duly adjusted and connected; (iv) an internal parallel-axis, straight tooth gear mechanism formed by a larger gear manually exerted from outside the device (SID) through an outer handle and a smaller gear , which gears mesh with one another and in turn with millimetric indentations of the inner side of the guides (301a/302a) facilitating, by means of manual operation of pulling on and releasing the outer handle , in cases of the femoral neck fracture, a mechanical extension and retraction of a telescopic or mobile element of a guide and a subsequent adaptation of the ankle band of the device (SID) to a specific anatomy of each injured subject. (i) a rigid guide having a telescopic structure which allows stabilising the pelvic area and perfectly aligning the affected lower limb, and having at its lower distal end a T-shaped ankle band completing said immobilising function of the assembly; (ii) a system for securing comprising a single padded anatomical band or a wing or two sets of padded anatomical bands or wings and wherein each of said padded anatomical bands or wings comprises a longitudinal multi-tunnel system formed by parallel longitudinal seams containing a viscoelastic layer on a rigid laminar endoskeleton that runs parallel to the limb to be immobilised, confers vertical rigidity and horizontal flexibility, and allows fixing the telescopic rigid guide to the body of the injured subject, encircling it, and completing the immobilisation of the pelvic area with both extremities en bloc; (iii) a series of straps / and / with quick fastening / and / which complete the function of the bands or wings / and / into which they are inserted, allowing both opposite ends to remain duly adjusted and connected; (iv) an internal parallel-axis, straight tooth gear mechanism formed by a larger gear manually exerted from outside the device (SID) through an outer handle and a smaller gear , which gears mesh with one another and in turn with millimetric indentations of the inner side of the guides (301a/302a) facilitating, by means of manual operation of pulling on and releasing the outer handle , in cases of the femoral neck fracture, a mechanical extension and retraction of a telescopic or mobile element of a guide and a subsequent adaptation of the ankle band of the device (SID) to a specific anatomy of each injured subject. <EOS>