Alec Titan
The Achilles tendon is the largest, strongest, and thickest tendon in the human body. It is also prone to injury. To test for an Achilles tendon rupture, healthcare professionals use variations of the Achilles tendon rupture test, including the Matles test, the Simmonds test (or calf squeeze test), and the Thompson test. The Thompson test is performed by squeezing the calf muscle while the patient is kneeling or lying face down with their feet hanging unsupported. If the tendon is ruptured, no plantar flexion will be observed.
| Characteristics | Values |
|---|---|
| Test Name | Thompson Test, Simmonds-Thompson Test, Calf Squeeze Test, Ankle Squeeze Test |
| Test Type | Physical Examination |
| Test Goal | To find out if there is a complete tear in the Achilles tendon |
| Test Steps | Patient lies prone with their foot over the end of the table. Alternatively, the patient could lie prone with their knee flexed to 90 degrees. The examiner squeezes the calf muscles, specifically the gastrocnemius-soleus complex, with their hand. |
| Test Result | Squeezing the calf should cause contraction of the Achilles tendon, resulting in plantar flexion. If the Achilles tendon is completely ruptured, there will not be any apparent plantar flexion. |
| Test Result Interpretation | A positive result indicates a ruptured Achilles tendon. A negative result means the heel moved as expected or that there is no rupture based on that test. |
| Test Considerations | The Thompson test shouldn't make pain or any other symptoms of a torn Achilles tendon worse. The test may not be suitable for patients with prior surgery, joint fusion, or severe calf muscle wasting. |
| Additional Tests | Matles Test, Hyper-dorsiflexion Test, Imaging Tests (MRI, Ultrasound, X-ray) |
Explore related products
The Thompson test
During the Thompson test, the patient lies on their stomach (prone) with their feet and ankles hanging over the edge of an examination table. The healthcare provider will then gently squeeze the calf muscle of the patient's lower leg, specifically the gastrocnemius-soleus complex. If the Achilles tendon is intact, this squeezing action will cause the foot to move downward (plantar flexion). However, if there is a complete rupture in the tendon, there will be no apparent movement of the foot.
It is important to note that the Thompson test may not always provide a definitive diagnosis. Even if there is some plantar flexion observed during the test, it does not completely rule out an Achilles tendon rupture. Therefore, additional clinical signs and diagnostic methods, such as imaging tests like ultrasounds or MRIs, should be employed to confirm the diagnosis.
Understanding Muscle Tears: Causes, Treatment, and Prevention
You may want to see also
Explore related products
The Matles test
The test involves the patient lying on their stomach (prone) with their feet and ankles in a neutral position. The patient then actively flexes their knees to 90 degrees. If the patient is under local anaesthesia, the examiner will passively flex the knees. The examiner must observe the position of the ankles and feet. If the foot remains in a slight plantar flexion, the tendon is uninjured. However, if the patient has an Achilles tendon rupture, the foot will fall into a neutral position or even into dorsiflexion, which is often referred to as "the angle of dangle". This test does not require any further palpation or movement.
How Illness Affects Muscle Shrinkage and Recovery
You may want to see also
Explore related products
The Simmonds test
If the Achilles tendon is intact, squeezing the calf muscle will cause the foot to move downward due to plantar flexion. However, if there is a rupture in the tendon, the foot will not move, indicating a positive test result. This absence of foot plantarflexion on calf compression is interpreted as a sign of a ruptured Achilles tendon.
The Simmonds-Thompson test is a valuable tool for screening Achilles tendon injuries, but it may not be sufficient on its own to diagnose a complete rupture. Additional clinical signs and diagnostic methods, such as imaging tests, are often employed to confirm the diagnosis. The test is simple, sensitive, and non-invasive, making it a popular choice for initial screening.
It is important to note that the Simmonds-Thompson test should not cause pain or worsen any existing symptoms. If the patient experiences any discomfort during the test, they should inform the healthcare provider. Early treatment of an Achilles tendon rupture is crucial for proper healing and preventing complications.
Shrinking Muscles: Strategies for Targeted Muscle Reduction
You may want to see also
Explore related products
$53.3 $117.99
Physical examination
During a physical examination, a doctor will first observe the patient's foot movement and ask about their symptoms and how the injury occurred. They will then feel, or palpate, the back of the calf and heel, where the tendon is located, to determine the level of inflammation and the origin of the pain.
The doctor will then perform one of several tests to check for a rupture. The Thompson test, also known as the calf squeeze test, involves the patient lying face down on an examination table with their feet hanging off the edge. The doctor will then squeeze the patient's calf muscle and observe the movement of the foot and heel. If the Achilles tendon is intact, the foot will move downward. If it is ruptured, there will be no movement.
Another test is the Matles test, where the patient lies on their stomach with their feet hanging off the examination table or their lower legs raised to 90 degrees. The examiner must observe the position of the ankles and feet. If the tendon is uninjured, the foot will remain in a slight plantar flexion. If the tendon is ruptured, the foot will fall into a neutral position or even into dorsiflexion.
A third test is the O'Brien needle test, where a needle is inserted 10 cm proximal to the calcaneal insertion of the Achilles tendon. With passive dorsiflexion of the foot, the needle will tilt rostrally if the tendon is intact.
Muscle Glycogen Storage: Understanding the Process
You may want to see also
Explore related products
Imaging tests
Ultrasound imaging is another option, although it cannot distinguish between a partial tear and tendinosis. A study by De Zordo et al. found that an ultrasonographic technique called sonoelastography was comparable to clinical examination and ultrasonography only in the identification of distinct softening of the Achilles tendon.
Magnetic resonance imaging (MRI) is a more advanced imaging technique that can be used to diagnose Achilles tendon injuries. MRI has been found to have high sensitivity in detecting complete tears, although it may not be necessary for diagnosing acute Achilles tendon ruptures. However, MRI can be useful for evaluating the possibility of partial disruption of the Achilles tendon, which may be misdiagnosed as simple Achilles tendinosis.
Overall, imaging tests can be a valuable tool for diagnosing Achilles tendon injuries, but they should be used in conjunction with physical examinations and other clinical findings.
Understanding the Nature of Intercostal Muscles
You may want to see also
Frequently asked questions
If you suspect an injury, it is best to visit a doctor for an assessment. A doctor will conduct a physical exam and imaging tests to determine whether you have injured your Achilles tendon.
A sudden pain in the back of the leg, with an audible snap, is a common sign of an Achilles tendon rupture.
Tests include the Matles test, the Simmonds test (or calf squeeze test), and the Thompson test. The Thompson test is a quick and easy way to check for an Achilles tendon rupture.
The patient lies on their stomach with their feet and ankles unsupported, hanging over the edge of an exam table. The doctor then squeezes the calf muscle to see if the heel moves. If the heel doesn't move, it's likely that the Achilles tendon is ruptured.
Treatment options include surgery and physical therapy. Imaging tests such as X-rays, ultrasounds, CT scans, and MRIs can be used to determine the extent of the injury and guide treatment.
