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positioning chap 4
workbook
| Question | Answer |
|---|---|
| identify the number of bones in the phalanges (finger&thumb) | 14 |
| identify the number of bones in the metacarpals (palm) | 5 |
| identify the number of bones in the carpals (wrist) | 8 |
| what is the total bones in phalanges, carpals, & metacarpals bones | 27 |
| the three parts of each phalanx, starting distally, are the what? | A. head, B. body, & C. base. |
| list the three parts of each metacarpal, starting proximally? | A. base B. body C .head |
| the name of the joint between the proximal and distal phalanges of the first digit is the? | interphalangeal joint (MCP) |
| which is the largest of the carpal bones? | capitate |
| what is the name of the hooklike process process extending anteriorly from the hamate? | hamulus or hamular process |
| which is the most commonly fractured carpal bone? | scaphoid |
| list one of the mnmemonics given in the textbook that uses the first letter of each of the preferred terms of the eight carpal bones | 1. Send Letter to Peter To tell'im (to) Come Home. or 2. Steve Left The Party To Take Carol Home. |
| in the anatomic position, which of the bones of the forearm is the located on the lateral (thumb) side? | radius |
| in the anatomic position which of the bones of the forearm is located on the medial side? | ulna |
| which joint permits the forearm to rotate during pronation pronation? | proximal radioulnar joint |
| the articular portion of the medial aspect of the distal humerus is called the? | trochlea |
| the structure found on the lateral aspect of the distal humerus is called the? | capitulum |
| the deep depression located on the posterior aspect of the distal humerus is the? | olecranon fossa |
| what articulations goes with the ginglymus joint? | interphalangeal, elbow joint(humeroulnar&humeroradial), elbow joint. |
| what articulations goes with the ellipsoidal joint? | metacarpophalangeal of second to fifth digits, radiocarpal |
| What articulations goes with the trochoidal joint? | Proximal radioulnar |
| What articulations goes with the plane joint? | Intercarpal |
| What articulations goes with the seller joint? | Carpometacarpal of the first digit |
| ellipsoidal joints are classified as freely movable, or___, and allow movement in __ directions | diarthrodial and 4 |
| true or false: in addition to the ulnar and radial collateral ligaments, the following five additional ligaments are also important in stability of the wrist joint? dorsal radiocarpal, oalmer radiocarpal, scapulolunate, & lunotriquetral. | true |
| which ligament of the wrist extends from the styloid process of the radius to the lateral aspect of the scaphoid and trapezium bones? | radial collateral ligament |
| what is the name of the two special turning or bending positions of the hND AND WIRST THAT DEMONSTRATE MEDIAL and lateral aspects of the carpal region? | ulnar deviation and radial deviation |
| which one of the ulnar or radial position is the most commonly performed to detect a fracture of the scaphoid bone? | ulnar deviation |
| forearm appear radiographically if pronated for a posteroanterior (PA) projection? | the proximal radius crosses over the ulna |
| the two important fat stripes or bands around the wrist joint are the? | scaphoid fat stripe & pronator fat stripe |
| the fat pads around the elbow joint are valuable diagnostic indicators if the following three technical/positioning requirements are met with the lateral position | elbow flexed 90 degrees optimal |
| true or false: if the posterior fat pad of the elbow is not visible radiographically, it suggests that a nonobvious radial head or neck fracture is present | false |
| true/false: excessive kV (analog imaging) may obscure the visibility of a fat pad | true |
| true/false: trauma or infection makes the anterior fat pad more difficult to see on a lateral elbow radiograph | false |
| which routine projections best demonstrate the scaphoid fat pad? | posteroanterior (PA) & oblique wrist |
| which routine projection best demonstrates the pronator fat stripe | lateral wrist |
| technical factors most commonly used for upper limb radiography on kV range (analog and digital) | Low to medium (50 to 70 kV for analog and 60 to 80 kV for digital systems) |
| technical factors most commonly used for upper limb radiography on large or small focal spot | small focal spot |
| technical factors most commonly used for upper limb radiography on long or short exposure time | short exposure |
| technical factors most commonly used for upper limb radiography most common minimum source image receptor distance (SID) | 40 inches |
| technical factors most commonly used for upper limb radiography grids are used if the body part measures greater than what? | 10cm |
| technical factors most commonly used for upper limb radiography. type of intensification screens most commonly used for analog imaging | Detail screens (analog) |
| small to medium dry plaster casts: increase | 5 to 7 kV |
| large plaster casts: increase | 8 to 10kV |
| fiberglass casts: increase | 3 to 4kV |
| correctly exposed radiographs: visualize __ margins and __ markings of all bones | Soft tissue, trabecular |
| the general rule for collimation for upper limb radiography states? | collimation borders should be visible on all four sides if the image receptor (IR) is large enough to allow this without cutting off essential anatomy |
| what pertinent factors help reduce image distortion during upper limb radiography? | 40 to 44 inches (102 to113 cm) SID Minimal object image receptor distance (OID) correct central ray placement and angulation use of small focal spot |
| ___ is a radiographic procedure that uses contrast media injected into the joint capsule to visualize soft tissue pathology of the wrist, elbow, and shoulder joints? | arthrography |
| what is the routine positioning routine for the second through fifth digits of the hand? | PA, PA oblique, and lateral |
| how much of the metacarpals should be included for PA projection of the digits | Distal aspect of metacarpals |
| list the two radiographic criteria used to determine whether rotation is present on the PA projection of the digits? | 1. symmetric appearance of both sides of the shafts of phalanges and distal metacarpals 2. Equal amounts of tissue on each side of the phalanges |