Quiz 3 Lecture 8-9 Forearm and Elbow

How to Perform AP of Distal Humerus of elbow on trauma positisions

First image is Proximal forearm flat on IR with elbow bent Second Image Humerus flat on IR with CR possibly angled slightly to hand

AP of Wrist best demonstrates the

carpal spaces

Axialateral projection of the elbow replaces

45* external Oblique Elbow

Central Ray angle/direction to produce the Axialateral projection of the elbow

45* to the shoulder joint with CR at the Olecranon Process

Axiolateral projection: Structures Present

label the structures I-N I. Semilunar Notch J. Radial Notch of the Ulna K. Humeroradial joint L. Capitellum M. Trochlea of humerus N. Head of Radius

Trauma Projections of the Elbow

AP of Distal Humerus AP Proximal Forearm x-table lateral

Gaynor-Hart and Superiorinferior of the wrist both best demonstrate the

Carpal Tunnel

The proximal radioulnar joint, is formed by the

Radial notch of the Ulna and the head of the Radius.

When Pronating the hand, which bone in the forearm turns medially?

Radius

45 Semi-Pronate oblique of wrist best demonstrates

Scaphoid/Navicular

PA of wrist with Ulnar Deviation best demonstrates the

Scaphoid/Navicular

Stretcher Method of the wrist best demonstrates the

Scaphoid/Navicular

What type of Projection used to best demonstrate Carpal Tunnel?

Tangential

The Proximal Ulna is formed by 2 processes separated by a half moon shaped notch called the

Trochlear notch or the Semilunar Notch

Elbow Lateral best demonstrates

Semilunar Trochlear notch in profile and the Olecranon Process in Profile (fat pads in elbow if injured)

The Olecranon Process and the Coronoid Process are separated by the

Semilunar/Trochlear Notch

Two structures that form the Distalradioulnar Joint

Ulnar notch of the Radius and the Head of the Ulna

What is the depression on the base of the radius (near the wrist)

Ulnar notch of the radius

Describe Gynor-Hart method of Carpal Tunnel

-Forearm parallel with long access of Image Receptor -Hold finger back with opposite hand -Angle CR to 25-30* to Palm of hand (toward elbow) 1" distal to base of 3rd metacarpal

Describe Superiorinferior method of Carpal Tunnel

-Palm of the hand on image receptor standing backward -Patient leaning forward to flex wrist (away from central ray) -CR directed tangential to carpal tunnel skimming it

Jones Method of Elbow

-Pt seated end of table elbow fully flexed 90* -Hand of affected Elbow over opposite shoulder -Center Olecranon Process to middle of Image Receptor -CR 2" above Olecranon Process

Stretcher Method of wrist

-Wrist placed on 20* sponge -PA in Ulnar deviation -CR Perpendicular OR (alt) -PA with Ulnar deviation -CR 20*angle toward elbow.

AP/ medial oblique elbow

A-Medial Epicondyle of Humerus B-Trochlea of Humerus C-Coronoid Process of Ulna D-Lateral Epycondyle of Humerus E-Capitellum of Humerus F-Radial Head G-Radial neck H-Radial Tuberosity K-Trochlea of Humerus L-Coronoid Process of Ulna M-Semilunar/Trochlear notch of the Ulna

Structures Present- AP Projection of the Elbow

A-Medial Epicondyle of Humerus B-Trochlea of Humerus C-Coronoid Process of Ulna D-Radial Head E-Capitellum of Humerus F-Lateral Epicondyle of Humerus H-Olecranon Process of Ulna

Later Projection of the Elbow

A-Superimposed Epicondyles B-Trochlea of Humerus C-Olecranon Process of Ulna D-Capitellum of Humerus E-Head Of Radius F-Radial Tuberosity G-Semilunar Notch of the Ulna

What are the Routine Projections of the Elbow joint

AP 45* Medial (internal) Oblique 45* Lateral (external) Oblique Lateral Axiolateral Lateral

Which Positions are used for Routine Projections on the Forearm

AP Lateral

Flexing of the Fingers on the PA-Wrist Will do what?

Bring the Carpal Bones closer to the IR and lower OID

Condyles of the distal Humerus are named:

Capitellum and Trochlea

Elbow 45* Medial Oblique best demonstrates

Corinoid Process and semilunar notch in profile

Beak-Like process on the anterior of the ulna

Coronoid Process

45* Medial (internal) Obliue Image what is Best demonstrated?

Coronoid Process and the Semilunar Notch of the Ulna in Profile.

The distal radioulnar joint, is formed by the

Depression in the base of the radius(ulnar notch) and the Head of the Ulna

Joint classifications of the Elbow: Humeroulnar joint- Humeroradial joint- Proximal Radiolunar joint-

Humeroulnar joint- Hinge Humeroradial joint- Hinge Proximal Radiolunar joint- Pivot

X-Table Lateral of elbow

IR against patient and CR tube Horizontal to elbow Joint

Fat Pads are only visible on what projection?

Lateral Projection

Where is Radius Located when in True Anatomical Posittion

Lateral side of forearm

Lateral of wrist best demonstrates

Lunate/Semi-Lunar

Which Epicondyle of the Disstal Humerus is palpable?

Medial

What is the Posterior Process of the ulna called

Olecranon Process

Routine Projects for the Wrist

PA Semi-pronated Oblique Semi-Supinated Oblique Lateral

PA-Wrist Central Ray is directed to? (colliminate)

Perp to mid-CARPAL Region -1/2" distal to Ulnar Styloid Process (collimate-base of metacarpals to distal 1/3 of radius and Ulna

45 Semi-Supinated oblique of wrist best demonstrates

Psiform

Elbow 45* External Oblique best demonstrates ( Or Axial Lateral Lateral)

Radial Head free of superinposition

Attachment site of the biceps tendon

Radial Tuberosity (anterior medial near proximal end)

Humeroradial joint in extension is formed by

Radial head and Capitelum of the distal Humerus

45* lateral (external) oblique elbow

Radial head is free of superimposition

Small pointed Processes at the distal ends of the Radius and Ulna are called

Styloid Processes

To Avoid Radial Crossover during an Elbow routine, the hand should be:

Supinated

With the humeroulnar joint in extension, describe the 2 articulations present.

The Coronoid Process of the Ulna articulates with the Trochlea of the Distal Humerus. AND The Olecranon Process of the Ulna articulates with the Olecranon Fossa of the of the Distal Humerus

Which process and Fossa articulate With the humeroulnar joint in flexion:

The Coronoid process of the ulna articulates with the coronoid fossa of the distal Humerus

What is the Placement of Thumb and Elbow forLateral Projection of the Forearm

Thumb up in PA position and Elbow in 90* angle with