• Skip to main content
  • Skip to primary sidebar
  • Skip to footer
  • General Ortho
  • Procedures
  • Spine
  • Upper Limb
  • Lower Limb
  • Pain
  • Trauma
  • Tumors
  • Newsletter/Updates
  • About Us
  • Contact Us

Bone and Spine

Orthopedic health, conditions and treatment

Forearm Fractures in Adults [Fracture Radius Ulna]

By Dr Arun Pal Singh

In this article
    • Relevant Anatomy of Forearm Bones
    • Mechanism of Injury of Forearm Fractures
    • Clinical Presentation of Forearm Fractures
    • Imaging
    • Treatment of Forearm Fractures
      • Cast Immobilization
      • Operative Treatment
    • Complications of Forearm Fracture

Forearm fractures are very common in young active adults. These fractures generally include at least one or both of the forearm bones namely radius or ulna.

Fracture of proximal and distal portions of these bones are special fractures and are discussed separately.

This article addresses the injury to the diaphyseal radius and ulna without an associated distal or proximal radioulnar joints injury. These injuries are discussed separately.

Forearm has two bones radius and ulna. They articulate at elbow and wrist with each other and other bones to form part of elbow and wrist joints. Forearm fracture involves the fracture of shaft of ulna or radius or both bones. On most of the occasions, both bone fracture together. In case of single bone fractures, the proximal or distal joint might be injured.

It is uncommon for a single bone to be injured without any associated injury to other bone or either joint.

The forearm is a complex anatomic structure and a very important part of the upper extremity.

Malunion [shortening and angulation] can cause many problems of the function of the upper limb.

Therefore,  precise reduction for anatomical restoration and secure fixation is very necessary in forearm fractures.

Relevant Anatomy of Forearm Bones

Radius and Ulna Anatomy

The radius and ulna are two bones of the forearm and come into contact with each other only at the ends. They connect proximally at the elbow joint and distally at radioulnar joint.

Ulna bone is relatively straight bone. It articulates with the distal humerus at the elbow and runs virtually subcutaneously distally to the ulnar styloid at the wrist.

The other bone, the radius is bowed. Its articulation with capitellum of humerus angles at least 13° opposite to the bow.

The distal radioulnar joint is such that it allows radius to sweep around the relatively fixed ulna with pronation and supination.

The space between the two bones is traversed by the interosseous membrane that runs obliquely. It originates at proximal radius and inserts at distal radius.

Radius and Ulna Image
Image Credit: corewalking

Radial bow and interosseous space must be preserved for normal motion of forearm.

Mechanism of Injury of Forearm Fractures

Forearm fracture can be caused by various mechanisms. The most common is motor vehicle injury especially automobile and motorbike injuries. Most of these vehicular accidents result in some type of direct blow to the forearm.

Direct trauma by an object such as stick etc also can cause the fracture of these bones.

gunshot injury of forearm
A gunshot injury of forearm

Gunshot wounds can cause forearm fracture. Such injuries are commonly associated with nerve or soft tissue deficits and frequently have a significant bone loss.

forearm fracture

Another cause is pathological forearm fracture and in such cases, a previous underlying pathology is responsible for the injury. This injury can result from trivial trauma, a force which normally would not cause a break in the normal bone.

Forearm fracture can occur as a result from fall too as in fall from heights.

fracture radius ulna distal third
28 years old young man fell from stairs. The x-ray shows a fracture of radius and ulna bone in the middle third and distal third junction.

Clinical Presentation of Forearm Fractures

In adults, it is very rare for these fractures to be undisplaced. As radius and ulna are strong bones, an injury of sufficient force is required to break them which would cause displacement.

fracture of Radius and Ulna
fracture of Radius and Ulna

After forearm fracture, the patient usually presents with a history of significant trauma which results in pain, swelling, deformity, and loss of associated function of the forearm. Often the displacement is significant enough to make a clinical diagnosis. Level of the deformity or level of tenderness in case of undisplaced fractures tells about the level of the fracture.

Presence of wound is likely to make the fracture open. Therefore any wound, especially near the fracture site, should be examined for communication with fracture hematoma. A careful neurologic evaluation of the motor and sensory functions of the radial, median, and ulnar nerves should be done. Amount Distal pulses should be palpated to check for the vascular status of the forearm.

Swelling of the forearm should be assessed to rule out compartment syndrome. A simple clinical test to diagnose a compartment syndrome is a passive stretch of the fingers. If the pain in the forearm is present when the fingers are passively extended, compartment syndrome is probably present.

If the patient is noncooperative or unconscious, compartment pressures should be measured to rule out the possibility of compartment syndrome.

Imaging

A simple anteroposterior and lateral radiograph of the forearm would help to diagnose the fracture pattern and the level of forearm fracture. Wrist and elbow joints should be included in the radiographs to rule out any associated injury.

Fracture Radius and Ulna
Fracture Shaft of Radius and Ulna

 

Fractures of Proximal Thirds Of Radius and Ulna
Fractures of Proximal Thirds Of Radius and Ulna. The image belongs to a 40 years old man who sustained trauma to left forearm when his motorbike collided with another vehicle.

The configuration of midshaft fractures of the radius and ulna varies depending on the mechanism of injury and the degree of violence involved.

Forearm injuries xray showing fracture of upper third of radius
Fracture of Radius Bone With Small Butterfly Fragment 43 years old mason fell from the height while working on a construction. He presented with pain in the right arm and swelling in the upper third of arm. Xray revealed a fracture of the upper third of radius with a small comminuted fragment (butterfly)

The patient was offered open reduction and internal fixation with low contact dynamic compression plate but the patient refused any treatment.

Low-energy fractures tend to be transverse or short oblique, whereas high-energy injuries are comminuted or segmented and are often associated with extensive soft tissue injuries.

Comminuted fractures are generally as a result of direct trauma to the bone.

comminuted fracture ulna
Comminuted Fracture of Ulna

 

fracture ulna distal end
Fracture Ulna Distal End

A line drawn through the radial shaft, neck, and head should pass through the center of the capitellum on any radiographic view of the elbow. This simple test can determine any associated elbow injury.

In case of doubtful wrist and elbow injuries computed axial tomography can be undertaken to look for subtle injuries. It is better to involve the normal part of the opposite limb for comparison.

Comminuted Fracture of Distal Part of Ulna
Comminuted Fracture of Distal Part of Ulna

Treatment of Forearm Fractures

Forearm fracture can be treated with various options. These vary from cast immobilization, plate fixation, intramedullary nailing to external fixation with each of them having an appropriate indication.

The basic principle behind the treatment is an accurate anatomic reduction, rigid fixation, and early mobilization of the soft tissues.

Majority of displaced fractures of the shafts of the radius and ulna are treated by the operative method. Closed treatment of forearm fracture should be undertaken only if there is a specific contraindication to operative treatment. Nondisplaced fractures of the shafts of both the radius and the ulna are very rare in adults.

Cast Immobilization

Simple cast immobilization is used in undisplaced fracture of both bones of the forearm in adults. However, this entity is very rare in adults.

Minimally Displaced Fracture of Ulna
Minimally Displaced Fracture of Ulnar Shaft would be treated conservatively

Following cast application, x-rays should be done at weekly interval. It is very common for these fractures to become displaced later, therefore they should be watched. In case the displacement occurs, it should be treated as a displaced fracture.

Displaced fractures of forearm do not yield satisfactory results with closed treatment and should be operated whenever possible.

Operative Treatment

Operative treatment allows for accurate fracture reduction and secure fixation.

Fracture Shaft of Ulna
Xray of Fracture of Shaft of Ulna

To achieve excellent results, anatomical reduction and stable fixation are required. Restoration of normal bone length will prevent subluxation of either the proximal or distal radioulnar joint and will reestablish length to the muscles. Restoration of rotational alignment is essential for normal pronation–supination function of the forearm.

 

radius and ulan fracture x-ray
Fracture of Radius and Ulna Before Internal Fixation

 

radius ulna fracture fixed with DCP
Same patient as above, x-ray after the fracture fixation. The fractures were fixed with locking compression plate for radius and low contact dynamic compression plate for the ulna. The posterior interosseous nerve was found tethered between two fragments of the radius but was intact.The fracture united after 3 months and posterior interosseous nerve recovered completely.

 

Open reduction and internal Fixation using plate fixation is the standard treatment for closed, displaced fractures of the forearm. These fractures of both bones of the adult should be fixed as soon as feasible preferably within the first 24 to 48 hours of injury because the fractures lying in liquid hematoma are easier to reduce and fix.

Operated Fracture Radius Ulna With DCP In Situ
Another operated Fracture Radius Ulna With Dynamic compression plate

But these fractures should be fixed any time irrespective of the delay for whatsoever reason.

Most of the fractures of both bones of forearm i.e. radius and ulna are treated by operative methods as nonoperative methods are not very successful especially in displaced fractures.

For closed fractures of these bones, the surgery is either fixation with plate and screws or intramedullary nailing.

Stainless steel, limited-contact, the dynamic compression plate is the treatment of choice for displaced fractures of the radius and ulna and provide very good results.

The preferred plate is the eight-hole dynamic compression plate with 3.5-mm cortical screws.

Though plate and screw combination takes care of most of the fracture configurations, there are some situations like open fractures, segmental fractures, failed plating and multiple injuries where nailing might be preferred.

The disadvantage of the plating is extensive soft tissue dissection and periosteal stripping. The advantage is the ability of the surgeon to reduce and fix fractures in anatomical position.

Fixation with intramedullary nails is a poor implant as compared to plating and should be reserved for selected indications. The anatomical reduction is of paramount importance in these fractures and that is difficult to achieve with nails.

In the presence of multiple injuries, all the injuries should be fixed.

fracture upper ulna,lower ulna, radial head and radial shaft
Multiple Fractures of Radius and Ulna With Implant In Situ

External fixators are used in case of open injuries or massive soft tissue loss.

Open forearm fractures require emergency treatment. The treatment needs to be individualized depending upon patient profile and wound.

Complications of Forearm Fracture

The complications associated with forearm fracture can be due to injury per se, failure to get the right treatment or complication of treatment as such. Many complications are general complications associated with any fracture and few are specific to these fractures.

Exposed Implant In operated ulna fracture
Exposed Implant In Ulna Fixed With Plate and Screws . The patient was operated for fracture in ulnar bone and in the postoperative period got infected.

The photograph reveals quite well the exposed ulna and the plate. An area in the middle shows the fracture line and the surrounding bone is devoid of any tissue cover.

Non union in forearm bones
19 years old nonunion Of Forearm Bones

Here is a list of most common complications of these fractures.

  • Infection
  • Nerve Injury
  • Vascular Injury
  • Compartment Syndrome
  • Posttraumatic Radioulnar Synostosis
  • Refracture
  • Muscle and Tendon Entrapment and Adherence
  • Malunion
  • Nonunion
  • Soft Tissue Contracture
  • Subluxation/dislocation of the distal radioulnar joint in Galeazzi fracture
  • Radial head instability in Monteggia fracture dislocation

 

Save

Save

Save

Save

Save

Save

Save

Save

Save

Spread the Knowledge
  •  
  •  
  •  
  •  
  •  
  •  

Filed Under: Lower Limb

About Dr Arun Pal Singh

Arun Pal Singh is an orthopedic and trauma surgeon, founder and chief editor of this website. He works in Kanwar Bone and Spine Clinic, Dasuya, Hoshiarpur, Punjab.

This website is an effort to educate and support people and medical personnel on orthopedic issues and musculoskeletal health.

You can follow him on Facebook, Linkedin and Twitter

Reader Interactions

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Primary Sidebar

Bicycle Seat Neuropathy or Cyclist Syndrome

Bicycle Seat Neuropathy or Cyclist Syndrome

Bicycle seat neuropathy is recurrent perineal numbness in a cyclist after prolonged cycling and carries the risk of impotence in the long run if unchecked. It is also known as pudendal neuralgia or pudendal nerve entrapment syndrome [In stricter sense, Pudendal nerve entrapment could be due to other causes as well.] The injuries and symptoms […]

Rotator Cuff Injury

Rotator Cuff Injury

Rotator cuff injury is a condition characterized by partial or complete tearing of one or more of the rotator cuff muscles.  The rotator cuff is formed by supraspinatus, infraspinatus, subscapularis and teres minor.  The supraspinatus is most commonly affected. The frequency of full-thickness rotator cuff tears ranges from 5-40%, with an increased incidence of cuff […]

Various approaches to ganglion impar

Ganglion Impar Block

The ganglion impar is a  sacrococcygeal ganglion, also called ganglion of Wather. It is a retroperitoneal structure located at the level of the sacrococcygeal junction. It is the final terminus of sympathetic chains formed by the fusion of both the chains. Therefore, the ganglion impar block is used in patients with the pain in pelvic […]

Dwarfism

Dwarfism – Causes, Types and Management

Dwarfism implies short stature that usually results from slow or delayed growth caused by some medical or genetic condition. [Dwarfism is known to be caused by about 200 distinct medical conditions.] It is an adult height of 4 feet 10 inches or under, as a result of a medical or genetic condition. The average height […]

Steps in hyperextension casting spine

Hyperextension Body Cast Application

Hyperextension cast or hyperextension body cast is applied with patient’s vertebral column in the position of hyperextension. Hyperextension cast extends from symphysis pubis to suprasternal notch in the front and from tip of coccyx to scapulae behind. This is done so as to prevent the even smallest degree of forwarding flexion of the spine. Hyperextension […]

Lumbar plexus details, PD wiki

Lumbosacral Plexopathy – Causes and Management

Lumbosacral plexopathy is an injury to the nerves in the lumbar or sacral plexus. Lumbosacral plexopathy can be caused by many disorders. The prevalence of lumbosacral plexopathies is unknown and is much less common than brachial plexopathies. Risk factors vary based on cause. Relevant Anatomy The lumbar and sacral plexuses together make lumbosacral plexus which […]

Trigger finger as a cause of hand pain

Trigger Finger Presentation and Treatment

This article mainly focuses on the adult trigger finger, for pediatric condition go to Pediatric Trigger Thumb Trigger finger is a common problem causing hand pain and disability. Trigger finger is due to abnormal gliding of thickened tendon at the distal aspect of palm within tendon sheath. This thickened tendon gets caught at the edge […]

Browse Articles

Footer

Pages

  • About
    • Policies
    • Contact Us

Featured Article

Myositis Causes and Treatment

Myositis can be caused by infection, injury, certain medicines, exercise, and chronic disease and is characterized by a chronic, progressive, … [Read More...] about Myositis Causes and Treatment

Search Articles

© Copyright: BoneAndSpine.com