# How do you measure radial length?

Radial length is measured on the PA radiograph as the distance between one line perpendicular to the long axis of the radius passing through the distal tip of the radial styloid. A second line intersects distal articular surface of ulnar head.

Volar tilt is a measurement made on the lateral projection of the wrist as an angle of the distal radial surface with respect to a line perpendicular to the shaft. A normal range is considered at around 10-25° 1. An angle of zero or less is indicative of dorsal angulation.

Subsequently, question is, what does dorsal angulation mean? Fracture angulation describes a specific type of fracture displacement where the normal axis of the bone has been altered such that the distal portion of the bone points off in a different direction. Angulation is described using words like: dorsal/palmar.

Radial inclination: the angle between two lines—one drawn perpendicular to the long axis of the radius at the ulnar corner of the lunate fossa and the other between that point in the lunate fossa and the tip of the radial styloid. Average = 23°. Measurement of radial height and inclination plus ulnar variance.

What is a radial styloid fracture?

Radial styloid process. Breakage of the radius at the radial styloid is known as a Chauffeur’s fracture; it is typically caused by compression of the scaphoid bone of the hand against the styloid.

### How do you measure radial height?

Radial length or height Radial length is measured on the PA radiograph as the distance between one line perpendicular to the long axis of the radius passing through the distal tip of the radial styloid. A second line intersects distal articular surface of ulnar head. This measurement averages 10-13 mm.

### How is volar tilt measured?

The radial inclination is measured by drawing a line perpendicular to the long axis of the radius and a tangential line from the radial styloid to the ulnar corner of the lunate fossa. The volar tilt, or volar inclination, is measured on the lateral view.

### How is dorsal angulation measured?

Dorsal angulation of the articular surface of the radius was measured on the lateral view as the angle between a line connecting the dorsal and palmar lips of the radius and a line perpendicular to the central axis of the radius12.

### What is dorsal and volar?

The palmar fascia is palmar to the tendons of muscles which flex the fingers, and the dorsal venous arch is so named because it is on the dorsal side of the foot. Volar can also be used to refer to the underside of the palm or sole, which are themselves also sometimes used to describe location as palmar and plantar.

### What 3 articular surfaces are important when evaluating distal radius fracture?

PERTINENT ANATOMY The distal radius has three concave articular surfaces—the scaphoid fossa, the lunate fossa, and the sigmoid notch—for artic- ulation with the scaphoid, lunate, and ulnar head, respectively (Figures 17.5 and 17.6).

### What is a Colles fracture?

A Colles’ wrist fracture occurs when the radius bone in your forearm breaks. It’s also known as a distal radius fracture, transverse wrist fracture, or a dinner-fork deformity of the wrist. Your radius is the larger of the two main bones in your forearm. The distal part of the radius is the end near your wrist.

### What is a Barton’s fracture?

A Barton’s fracture is an intra-articular fracture of the distal radius with dislocation of the radiocarpal joint. The Barton’s fracture is caused by a fall on an extended and pronated wrist increasing carpal compression force on the dorsal rim.

### What is a chauffeur’s fracture?

Chauffeur’s fracture, also known as Hutchinson fracture, is a type of fracture of the forearm, specifically the radial styloid process. The injury is typically caused by compression of the scaphoid bone of the hand against the styloid process of the distal radius.

### What is negative ulnar variance?

Negative ulnar variance is a condition in which the ulna is relatively shorter than the radius at the carpus. It was found in 21% of 203 normal wrists.

### How is ulnar variance calculated?

To determine ulnar variance on radiographs, the generally accepted standard view is a posteroanterior view obtained with the wrist in neutral forearm rotation, the elbow flexed 90° and the shoulder abducted 90°.

### How is metacarpal angulation measured?

The lateral view should be used to measure the degree of angulation of the shaft of the metacarpal as compared to the mid-point of the fracture fragment.

### What is a partial articular fracture?

Articular: fractures which involve the joint surface. They are subdivided into partial articular and complete articular fractures. Articular, partial: only part of the joint is involved while the remainder stays attached to the diaphysis.

### What does angulation mean?

Medical Definition of angulation 1 : the action of making angular. 2 : an angular position, formation or shape especially : an abnormal bend or curve in an organ.

### What is comminuted fracture?

A comminuted fracture is a break or splinter of the bone into more than two fragments. Since considerable force and energy is required to fragment bone, fractures of this degree occur after high-impact trauma such as in vehicular accidents.