lumbar puncture balloon tamponade of vascular injuryabdominal aorta clampingodontoid fracture positioningpancreatic exposureneck anatomystructural graft placementpopliteal vessels exposuregraft on descending aortainferior vena cava anatomybrachial artery exposuresubclavian vessels anatomydrilling of uncusremoval of ependymomaincisions for C1-C2 screw placementlung hilar structures anatomypopliteal vessel exposureorbital blowout fracture4th-6th layers of neck musclesneedle ventilationsuperior mesenteric vessels exposuremetatarsal fracturesleg fasciotomypedicle subtraction osteotomyproxiamal abdominal aorta exposurelaminoplasty positioningsubluxationdiscectomy and corpectomytranslaminar screw preparationrenal vessels anatomyshoulder dislocationsanterior transarticular screw fixationupper mediastinal vessels anatomy vascular reconstructionleft thoracotomy anatomy