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Up to 5 percent of fractures are of the humerus so this is a common presentation at Emergency Departments, with up to 80 percent of fractures either not displaced or displaced minimally. As older people suffer mostly from this fracture, there is a relationship with osteoporosis and people often have a fractured forearm on the same side. These fractures occur mostly at the upper arm, known as the humeral neck (shoulder fractures), and at the middle of the arm bone, with artery or nerve damage possible but not common.

Humeral fractures are typically caused by a fall on the arm, force being transmitted from the elbow or hand or by a fall onto the side of the upper arm. The upper arm is the site of attachment of many of the arm muscles and the pull these exert at the time of injury can displace the fracture. Older people are more susceptible to these fractures with a typical age of around 65 being the peak occurrence, while if this fracture occurs in young people it is due to road accidents or sporting injuries.

If the fracture occurred without significant force then a pathological cause such as cancer must be suspected. On physio examination pain will occur on movement of the shoulder or the elbow, there may be extensive bruising and swelling, the arm may appear short if the fracture is displaced in shaft fractures and there is very restricted shoulder movement. Radial nerve damage is rare in upper humeral fractures but more common in fractures of the shaft, leading to “wrist drop”, weakness of the wrist and finger extensors and some thumb movements.

Shoulder Fracture Management

Acutely the patient is kept still and given adequate analgesia to relieve the initial pain. Fractures of the upper part of the arm bone can mostly be managed without operation if there is little or no displacement but rotator cuff injury could occur if the greater tuberosity is fractured, especially if it is displaced any distance, great force was involved or the patient is older. A collar and cuff sling allows upper humeral fractures to traction themselves straight and in line, while shaft fractures can be braced but are difficult to control.

Displaced three or four part fractures typically require surgery, referred to as ORIF (open reduction internal fixation) and this is more likely in younger people. Older people may have a poorer result in terms of pain and movement so may have surgical replacement of the head of the arm bone. Plating and nailing is usually unnecessary for shaft fractures as they heal well normally. The side effects of humeral fractures include nerve injury in shaft fractures, adhesive capsulitis and avascular necrosis of the head of the humerus. Healing occurs in six or eight weeks and older people may never regain full movement of the shoulder.

Physiotherapy for Shoulder Fractures

Initial physiotherapy assessment consists of assessing the patient’s pain levels as these can vary hugely, the joint ranges of motion of the elbow, hand and wrist and the tissue swelling and bruising in the arm. Muscle strength is tested in the forearm as this may indicate an injury to the radial nerve, as may loss of sensory discrimination. The patient may stay in the sling for 2-3 weeks with the physio exercises beginning early if pain is reasonable and the fracture stable. The aim is to maintain the range of motion of the shoulder joint while the fracture heals, by performing bent over pendular exercises to counteract gravity.

Three weeks after the fracture bone healing will be well under way so the physiotherapist will instruct the patient in auto-assisted exercises, using the other arm, to help reduce stress on the injury. Unassisted exercises are the next step as the arm becomes stronger, to practice lateral and medial rotation and flexion. At six weeks the bone will be clinically sound so the physio can progress to more vigorous movements with resistance and gentle end-range stretching. Joint mobilisations can be useful to free up the sliding and gliding movements of the joint and strengthening and joint range work continued with Theraband.