Adson’s Test is a thoracic outlet provocation test used to observe whether a specific neck, shoulder and breathing position reproduces familiar upper-limb symptoms or produces a concerning vascular response. A positive test may include reproduction of familiar arm symptoms, paraesthesia, heaviness, vascular-type symptoms or a marked pulse change, but pulse change alone should not be interpreted as diagnostic. The test may support suspicion of thoracic outlet involvement when interpreted with history, symptom behaviour, neurological screening, vascular screening and other provocation tests. It does not confirm thoracic outlet syndrome on its own.

Introduction

Thoracic outlet symptoms can be difficult to assess because neck, shoulder, brachial plexus, vascular and peripheral nerve presentations can overlap. Clients may describe arm heaviness, paraesthesia, fatigue, colour change, coldness, hand symptoms or symptoms aggravated by overhead positions. Adson’s Test is one of several provocative tests used to explore whether positioning the neck, shoulder and upper limb reproduces familiar symptoms.

During the test, the client’s head and neck are positioned while the professional monitors symptom response and may palpate the radial pulse. Historically, radial pulse reduction or disappearance was treated as an important finding. Current interpretation should be more cautious because pulse changes can occur without confirming thoracic outlet syndrome, and symptoms may be reproduced for reasons other than true neurovascular compression.

Adson’s Test is best used as one part of a broader assessment. A clear result requires careful recording of the side tested, arm position, head position, breathing instruction, symptoms, pulse response and stopping reason.

Quick Summary

Test name: Adson’s Test
Body region: Thoracic outlet, cervical spine, shoulder girdle and upper limb
Purpose: Assess symptom response to thoracic outlet positioning
Commonly associated with: Thoracic outlet syndrome assessment and upper-limb neurovascular symptom screening
Positive finding: Reproduction of familiar upper-limb symptoms, vascular-type symptoms or marked pulse change with symptoms
Negative finding: No familiar symptom reproduction and no concerning vascular response
Best used with: History, cervical assessment, shoulder assessment, neurological screen, vascular screen, Roos/EAST, Halstead, Eden and upper-limb neurodynamic tests
Key limitation: Adson’s Test does not confirm thoracic outlet syndrome on its own.

What Is Adson’s Test?

Adson’s Test is a thoracic outlet provocation test that combines cervical extension, cervical rotation, shoulder positioning and deep breathing. The professional may monitor radial pulse while also asking the client to report familiar symptoms such as tingling, numbness, heaviness, coldness, colour change, fatigue or arm pain.

The test is intended to narrow the interscalene region and alter the relationship between the cervical spine, scalene muscles, first rib, subclavian artery and brachial plexus. However, it does not isolate one structure and cannot determine the exact cause of symptoms by itself.

Why It Is Used

Adson’s Test is used when thoracic outlet involvement is being considered as part of a broader upper-limb assessment. It may be relevant when symptoms are influenced by neck position, shoulder position, overhead activity, breathing or sustained postures.

The test may help guide further assessment by showing whether a thoracic outlet loading position reproduces familiar symptoms. It can also help identify when further neurological screening, vascular screening, medical referral or broader upper-limb assessment may be appropriate.

What It Assesses

Adson’s Test assesses:

• Symptom response to thoracic outlet positioning
• Possible neurovascular symptom behaviour
• Upper-limb heaviness, paraesthesia or fatigue response
• Radial pulse response, if monitored
• Symptom change with cervical extension and rotation
• Symptom change with deep inspiration or breath hold
• Safety and tolerance to provocative thoracic outlet positioning

It does not directly diagnose neurogenic, venous or arterial thoracic outlet syndrome.

Who It Is Useful For

Adson’s Test may be useful for clients with upper-limb symptoms that appear related to neck, shoulder, breathing or overhead positions. These symptoms may include arm heaviness, paraesthesia, numbness, hand fatigue, coldness, colour change or symptoms that increase with sustained shoulder positioning.

It may also be useful in education settings where professionals are learning how to record neurovascular symptom behaviour safely. It should be used cautiously when vascular symptoms are prominent or when red flags are present.

When to Use This Test

Use Adson’s Test when:

• Thoracic outlet involvement is part of the assessment reasoning
• The client has upper-limb symptoms influenced by neck or shoulder position
• The client can tolerate cervical extension and rotation
• You can monitor symptom behaviour carefully
• Vascular and neurological symptoms can be documented clearly
• The result will be interpreted with other tests, not alone

When Not to Use or When to Be Cautious

Use caution or avoid the test when there is unexplained upper-limb swelling, marked colour change, suspected vascular compromise, suspected clotting, faintness, dizziness, severe neurological deficit, acute trauma, cervical instability concern, known vascular disease, severe cervical pain or symptoms requiring urgent medical review.

Stop the test immediately if dizziness, faintness, colour change, coldness, severe paraesthesia, worsening neurological symptoms, concerning pulse change with symptoms or client distress occurs.

Equipment Required

Adson’s Test requires minimal equipment:

• Chair or safe standing space
• Pain and symptom rating scale
• Symptom-location recording method
• Optional pulse monitoring
• Measurz app for structured documentation
• Optional video for posture and setup review
• Optional MAT notes for cervical, shoulder and neurovascular findings

Within Measurz, Adson’s Test can be recorded alongside Roos/EAST, Halstead, Eden, Wright, cervical ROM, shoulder ROM, upper-limb neurodynamic testing, grip strength and neurological screening. Measurz supports structured notes, symptom mapping, pain scores and comparison across sessions.

Step-by-Step Protocol / Practice

Setup

Explain that the test places the neck, shoulder and upper limb in a position that may reproduce symptoms. Ask the client to report symptoms immediately, including tingling, numbness, heaviness, coldness, colour change, dizziness or familiar arm symptoms.

Record baseline symptoms before testing, including pain score, symptom location, hand temperature or colour concerns, and any current neurological or vascular-type symptoms.

Client position

The client sits or stands upright. Sitting is often preferred for safety and consistency. The tested arm may rest by the side or be slightly extended and externally rotated depending on the protocol used.

Examiner/professional position

Stand beside the client on the tested side. If pulse monitoring is included, locate the radial pulse before positioning begins.

Hand placement

One hand may monitor the radial pulse. The other hand may guide shoulder or arm position if required. Avoid excessive pressure or forcing the arm.

Stabilisation

Keep the client upright and relaxed. Avoid excessive cervical extension or forced shoulder positioning. The test should be provocative enough to assess symptom response but not aggressive.

Movement or force direction

A common sequence is:

1. Locate the radial pulse if pulse monitoring is used.
2. Position the tested arm according to the selected protocol.
3. Ask the client to extend the neck.
4. Ask the client to rotate the head toward the tested side.
5. Ask the client to take a deep breath and hold briefly if tolerated.
6. Monitor symptoms and pulse response.
7. Return to neutral and compare with the other side if appropriate.

Instructions

Ask:

“Tell me immediately if you feel tingling, numbness, heaviness, coldness, dizziness or familiar symptoms.”
“Tell me if your symptoms change, spread or become stronger.”
“Let me know if this feels unsafe or uncomfortable.”

Positive finding

A positive finding is reproduction of familiar upper-limb neurological or vascular-type symptoms during the test position. A marked radial pulse change may be recorded, but pulse change alone should not be used as the only positive finding.

Negative finding

A negative finding is no familiar symptom reproduction and no concerning vascular or neurological response during the test.

Stopping criteria

Stop if symptoms increase sharply, dizziness occurs, colour change appears, the hand becomes cold, paraesthesia increases significantly, neurological symptoms worsen, pulse concerns occur with symptoms, or the client feels unwell.

Safety notes

Do not hold the position for longer than necessary. Do not interpret pulse change alone as diagnostic. Prioritise symptom response, safety and appropriate referral when vascular signs are concerning.

Positive and Negative Test Interpretation

A positive Adson’s Test may increase suspicion of thoracic outlet involvement when it reproduces the client’s familiar arm symptoms or vascular-type symptoms. The finding is more meaningful when the symptom response matches the client’s history and is supported by other neurovascular or thoracic outlet findings.

A positive result does not confirm thoracic outlet syndrome or identify whether the presentation is neurogenic, venous or arterial. Symptoms may also be influenced by cervical radicular symptoms, peripheral nerve sensitivity, shoulder position, anxiety, vascular sensitivity or general symptom irritability.

A negative Adson’s Test means the tested position did not reproduce familiar symptoms or a concerning vascular response. This does not exclude thoracic outlet involvement, especially when symptoms are intermittent, activity-specific or provoked by different positions such as overhead loading.

Sensitivity, Specificity and Diagnostic Accuracy

Adson’s Test has variable diagnostic accuracy across studies and should not be interpreted as a stand-alone diagnostic test.

Gillard et al. (2001) evaluated several provocative tests in people with suspected thoracic outlet syndrome. Commonly cited values for Adson’s Test from this work are approximately:

• Condition/presentation: Suspected thoracic outlet syndrome
• Population: People referred with clinical suspicion of TOS
• Reference standard: Final diagnosis based on available clinical and investigation findings
• Sensitivity: approximately 79%
• Specificity: approximately 74–76%
• Key limitation: The reference standard was not a single definitive gold standard, and thoracic outlet syndrome is difficult to confirm objectively.

Later systematic review evidence has emphasised that the diagnostic accuracy of clinical tests for neurogenic and vascular thoracic outlet syndrome is limited by heterogeneous methods, variable reference standards and risk of bias. This means Adson’s Test may support clinical reasoning, but it should not be used to confirm or exclude TOS on its own.

Reliability and Validity

Reliability may be affected by differences in cervical rotation, cervical extension, arm position, breath-hold duration, examiner pulse palpation, client posture and symptom criteria. Pulse palpation can be especially variable between examiners and should be interpreted cautiously.

Validity is limited because the test does not isolate the brachial plexus, subclavian artery or one specific thoracic outlet space. A positive result indicates symptom reproduction during the test position, not proof of a specific compression site or pathology.

Common Errors and Limitations

Common errors include:

• Using pulse change alone as a positive result
• Holding the position too long
• Forcing cervical extension or shoulder position
• Ignoring dizziness, colour change or vascular symptoms
• Failing to ask whether symptoms are familiar
• Using the test alone to diagnose TOS
• Not comparing with other thoracic outlet or cervical tests
• Not recording arm position, head position or breath instruction
• Missing urgent vascular referral indicators

Limitations include false positives, variable protocols, difficulty confirming TOS, overlap with cervical and shoulder symptoms, and poor stand-alone diagnostic certainty.

Practical Applications

Adson’s Test can be useful for documenting symptom response to a thoracic outlet loading position. It may help guide whether further thoracic outlet testing, vascular screening, neurological screening or referral should be considered.

For education, the test is valuable because it teaches professionals to avoid over-relying on pulse change and to prioritise symptom relevance. The most useful record includes the exact position, symptoms reproduced, pulse response if monitored, and whether the response matched the client’s familiar symptoms.

How to Record This in Measurz

In Measurz, record:

• Test name: Adson’s Test
• Side tested
• Client position: sitting or standing
• Arm position
• Head position
• Breathing instruction
• Result: positive, negative, unclear or unable to test
• Pain or symptom score before, during and after
• Symptom location
• Symptom quality
• Whether symptoms were familiar
• Pulse response if monitored
• Vascular symptoms: colour change, coldness, swelling or heaviness
• Neurological symptoms: numbness, tingling, weakness or paraesthesia
• Dizziness or feeling unwell
• Time held
• Comparison side
• Reason for stopping
• Confidence in result
• Related cervical, shoulder, Roos/EAST, Halstead, Eden, Wright or neurological findings
• Referral notes if vascular symptoms are concerning

Recording these details improves repeatability, assessment reasoning, team communication, client education and reporting quality.

Related Tests / Internal Links

• Roos Stress Test
• Halstead Test
• Eden Test
• Wright Test
• Cervical Distraction Test
• Spurling’s Test
• Upper Limb Tension Test
• Cervical ROM Assessment
• Shoulder ROM Assessment
• Grip Strength Test
• Neurological Screen

FAQs

What is Adson’s Test used for?

Adson’s Test is used to assess whether a thoracic outlet loading position reproduces familiar upper-limb neurological or vascular-type symptoms.

What is a positive Adson’s Test?

A positive finding is reproduction of familiar symptoms such as arm heaviness, tingling, numbness, vascular-type symptoms or marked pulse change with symptoms.

Does Adson’s Test diagnose thoracic outlet syndrome?

No. It may support suspicion of thoracic outlet involvement, but it does not diagnose TOS on its own.

Is pulse loss enough for a positive test?

Pulse change alone should be interpreted cautiously. Symptom reproduction and clinical context are more important than pulse change by itself.

What is a negative Adson’s Test?

A negative result means the test did not reproduce familiar symptoms or a concerning vascular response. It does not fully exclude thoracic outlet involvement.

When should the test stop?

Stop for dizziness, colour change, coldness, worsening neurological symptoms, marked symptom escalation or feeling unwell.

What should be recorded in Measurz?

Record side, arm position, head position, breathing instruction, symptoms, pulse response if used, vascular signs, neurological signs and reason for stopping.

Key Takeaways

Adson’s Test is a thoracic outlet symptom provocation test.
A positive result is most meaningful when familiar symptoms are reproduced.
Pulse change alone is not diagnostic.
The test should be interpreted with history, cervical, shoulder, neurological and vascular findings.
Measurz should capture symptoms, pulse response, position, safety response and related findings.

References

Dessureault-Dober, I., Bronchti, G., & Bussières, A. (2018). Diagnostic accuracy of clinical tests for neurogenic and vascular thoracic outlet syndrome: A systematic review. Journal of Manipulative and Physiological Therapeutics, 41(9), 789–799. https://doi.org/10.1016/j.jmpt.2018.02.007

Gillard, J., Pérez-Cousin, M., Hachulla, É., Remy, J., Hurtevent, J. F., Vinckier, L., Thévenon, A., & Duquesnoy, B. (2001). Diagnosing thoracic outlet syndrome: Contribution of provocative tests, ultrasonography, electrophysiology, and helical computed tomography in 48 patients. Joint Bone Spine, 68(5), 416–424.

Hooper, T. L., Denton, J., McGalliard, M. K., Brismée, J. M., & Sizer, P. S. (2010). Thoracic outlet syndrome: A controversial clinical condition. Part 1: Anatomy, and clinical examination/diagnosis. Journal of Manual & Manipulative Therapy, 18(2), 74–83. https://doi.org/10.1179/106698110X12640740712734

Masocatto, N. O., Da-Matta, T., Prozzo, T. G., Couto, W. J., & Porfirio, G. (2022). Thoracic outlet syndrome: A narrative review. Frontiers in Cardiovascular Medicine, 9, 802183. https://doi.org/10.3389/fcvm.2022.802183