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ch6 lower limb proj
Procedurs 1. lower limb projections
| Question | Answer |
|---|---|
| angle on AP toes? | 10-15 toward calcaneus. (perp to phalanges) |
| Angle on AP foot? | 10 posteriorly (toward calcaneus) |
| AP oblique medial foot rotation degree? | foot rotates medially to place plantar surface 30-40 degrees to IR |
| AP oblique medial rotation foot is best for visualizing what? | sinus tarsi! tubercle of 5th metatarsal in profile, joint spaces of cuboid! |
| AP oblique latéral rotation of foot is best for? | space between first and second cuneiforms. navicular well visualized. |
| Foot projection? tibiotalar joint is open, distal fibula is superimposed by tibia. | lateral - lateromedial foot |
| plantodorsal (axial) projection of calcaneus. CR? | 40 degrees cephalad @ base of third metatarsal. |
| Medial mortise joint is open and lateral is closed? | AP ankle |
| rotation of leg and foot for mortise ankle? | 15-20 degrees medial. (intermalleolar line is parallel) |
| No rotation of an AP projection-leg is evident by? | femoral and tibial condyles in profile with intercondylar eminence centered within the intercondylar fossa. |
| No rotation in a true lateral projection of the leg is evident by? | tibial tuberosity in profile, portion of proximal head of fibula is superimposed by the tibia. |
| AP knee projection- patient position? | leg internally rotated 3-5 degrees (or until interepicondylar line is parallel to IR) |
| AP knee projection- CR? | CR parallel to articular facets (tibial plateau). Average pt- CR is perpendicular to IR less than 19 cm (thin)- angle CR 3-5 caudad more than 24 cm (thick)- CR 3-5 cephalic (((from ASIS to table top)))) |
| AP KNEE CR ANGLE Thin= Thick= | thin-caudad thick- caphalad |
| Lateral condyles of femur and tibia are in profile. Head and neck of fibula are visualized without superimposition. | AP oblique knee medial rotation |
| Medial condyles of femur and tibia are in profile. Fibula is superimposed by tibia proximally. | AP oblique knee lateral rotation |
| Over rotation of lateral knee evident by? under rotation? | less superimposition of fibular head by tibia= over rotated. more superimposition= under rotated. |
| CR angle for lateral knee? | 5-7 degrees cephalad (results in superimposition of condyles) |
| tunnel view. prone position? | camp coventry method. |
| Camp coventry (prone) tunnel, flexion? | 40-50 degrees, support leg up. CR angled to tibial plateau |
| tunnel view. Holmblad method patient position? | Kneeling, partially standing (straddling table or affected leg on stool or chair). Pt leans forward 20-30 degrees so knee is flexed 60-70. CR is perp to IR and lower leg |
| Tangential (axial or sunrise) patella. Merchant Pt position? | Knees flexed at 40 over the end of the table, resting on a leg support. |
| Merchant position, CR? SID? | CR angled 30 degrees caudad, midway between patella. (shooting downward at feet) SID=48-72. |
| Settegast mathod? Pt positon? CR at? SID? | Tangential patella. Pt flex knee to minimum of 90 degrees. CR tangential to femoropatellar space. SID= 40. |
Created by:
Zoest35
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