Thoracic outlet syndrome (TOS) refers to a group of conditions that occur when blood vessels o
Julie Cai
November 15, 2022
Thoracic outlet syndrome (TOS) refers to a group of conditions that occur when blood vessels or nerves that run from the neck to the armpit are compressed. It only describes a group of conditions because the signs and symptoms of this condition vary from patient to patient, depending on the structures involved.
The thoracic outlet is the space above the collarbone that is bounded by the collarbone, first rib, pectoralis minor and scalene muscles as seen above. Important arteries, veins and nerves (i.e. the subclavian vessels & brachial plexus) that run down the arm have to pass through this area of the thoracic outlet. Because of their proximity to one another, they are susceptible to compression, which results in the following symptoms.
Individuals with TOS most likely present with pain in the neck or shoulder, or numbness or tingling involving either the entire upper limb or the forearm and hand. The arm may also feel weak, or easily fatigued and also have reduced grip strength. The involved arm may also feel colder, discoloured or blotchy skin, a throbbing lump near the collarbone or have a weak pulse.
These symptoms typically worsen when the head is held in a forward position, when the shoulders are drooped, raising the arm overhead or back, or sleeping on the affected shoulder. This is because any sort of movement that compresses the space in the thoracic outlet will lead to a worsening of the symptoms.
It also commonly occurs in:
→Due to the repetitive compression of the thoracic outlet
→ The change in scapular positioning can decrease the diameter of the cervicoaxillary canal
→These people typically have a tight pectoralis minor, scalanes, and upper trapezius muscles, with a weak serratus anterior and lower trapezius muscles; this causes excessive anterior tilt and protection of the scapula
TOS can also be caused by a traumatic event such as a car accident where there is a crush injury of the upper thorax, fractures of the clavicle (collarbone and/or first rib) or clavicle callus formation. It can also be caused by congenital anatomical abnormalities.
Physio & Chiro treatment of Thoracic Outlet Syndrome is aimed at reducing compromised structures in the thoracic outlet through correcting posture. Depending on the body mechanics, treatment usually involves soft tissue release of the pectoral and scalene muscles, mobilisation of the first rib and adjustments as indicated. Forward head posture, neuromobility, and scapulothoracic mobility and control on the thoracic cage can also be corrected with a mixture of manual therapy and therapeutic exercise.
If you have any further questions about how we can help with Thoracic Outlet Syndrome, head over to our Contact Us page, or book in now to make an appointment.
Podiatry is a branch of medicine that deals with diagnosing and treating disorders of the feet and lower limbs. A podiatrist (also known as a chiropodist) is a healthcare professional who specialises in this field. Podiatry is a relatively new branch of medicine, only emerging as a distinct profession in the early 20th century. However, the field has grown rapidly in recent years, owing to increasing awareness of the importance of foot health. Today, podiatrists play an important role in keeping people mobile and active. They often treat conditions such as bunions, heel pain, ingrown toenails and Achilles tendonitis. In addition, they can provide advice on footwear and foot care for people with diabetes or other medical conditions that put them at risk of foot problems.
Dry needling is a type of therapy that involves inserting thin needles into the skin and muscles. The needles are usually made of stainless steel and are very thin, so they cause minimal pain when inserted. However, some people report feeling a brief, sharp pain when the needle enters the skin. There are several theories as to why dry needling causes this pain. One theory is that the needles stimulate nerve endings in the skin and muscles, which triggers a pain response. Another theory is that dry needling causes a release of chemicals called cytokines, which can increase pain sensitivity. It’s important to note that while dry needling may cause some discomfort, it is generally not considered painful. Many people find relief from their chronic pain after undergoing dry needling therapy.
A syndesmosis injury is a serious condition that can occur when the bones in the ankle joint are not properly aligned. This can happen when the foot is planted awkwardly, or the ankle is twisted. If not treated properly, a syndesmosis injury can lead to long-term problems. There are two main types of syndesmosis injuries: anterolateral and posterior. Anterolateral injuries are more common when the foot is planted awkwardly on an uneven surface. Posterior injuries are less common and occur when the ankle is twisted. If you think you have a syndesmosis injury, it is important to see a doctor right away. Treatment will vary depending on the severity of the injury but may include rest, ice, elevation, and immobilization. Surgery may also be necessary in some cases.