Elbow Orthopaedic Test: Elbow Varus Stress

The Elbow Varus Stress Test assesses lateral elbow response to varus loading. It is commonly used when lateral collateral ligament complex involvement, lateral ulnar collateral ligament involvement or lateral elbow instability is suspected. A positive finding may include familiar lateral elbow pain, apprehension, increased lateral opening or a soft endpoint compared with the other side. Current evidence for the static manual varus stress test alone appears limited, so it should be interpreted with history, trauma mechanism, instability symptoms and related tests rather than as a stand-alone diagnostic test.

Introduction

A client may report lateral elbow pain after a fall, direct trauma, dislocation, hyperextension injury or loaded pushing task. They may describe the elbow as unstable, painful at end range or uncomfortable when weight bearing through the arm.

The Elbow Varus Stress Test can help assess whether lateral elbow loading reproduces symptoms or reveals side-to-side laxity. It does not confirm ligament injury on its own, but it can support assessment reasoning when combined with mechanism of injury, swelling, ROM, neurological findings and functional loading.

Quick Summary

Test name: Elbow Varus Stress Test
Body region: Lateral elbow and lateral collateral ligament complex
Purpose: Assess lateral elbow pain, laxity and endpoint quality under varus loading
Positive finding: Familiar lateral elbow pain, apprehension, increased lateral opening or soft endpoint compared with the other side
Negative finding: No familiar pain, apprehension or meaningful side-to-side laxity
Best used with: Trauma history, elbow ROM, posterolateral rotatory instability tests, lateral pivot-shift reasoning, grip or weight-bearing symptoms and imaging referral when indicated
Key limitation: A positive test does not confirm lateral collateral ligament injury on its own

What Is the Elbow Varus Stress Test?

The Elbow Varus Stress Test is a manual elbow stability test. The examiner stabilises the upper arm and applies a varus force through the forearm. This stresses the lateral elbow structures, including the lateral collateral ligament complex.

The result should be recorded as pain, laxity, apprehension, endpoint quality or inability to test. These findings are more useful than simply writing “positive” or “negative”.

Why It Is Used

The test is used when lateral elbow instability or lateral collateral ligament complex involvement is part of the assessment reasoning.

It may be relevant after elbow dislocation, fall onto an outstretched hand, varus injury, contact injury, lateral elbow trauma, repeated weight-bearing through the arm or symptoms of posterolateral elbow instability.

What It Assesses

The test assesses symptom response and lateral opening under varus stress. It does not directly identify which ligament fibres are involved and does not confirm a tear.

Lateral elbow pain during this test may also be influenced by joint irritation, radial head symptoms, posterolateral rotatory instability, pain guarding, previous trauma, nerve sensitivity or extensor tendon pain.

Who It Is Useful For

This test may be useful for athletes, gym clients, manual workers and clients with lateral elbow pain or instability symptoms after trauma, dislocation, pushing, falling or weight-bearing tasks.

When to Use This Test

Use when lateral elbow instability, lateral ligament involvement or varus-loading symptoms are clinically relevant and the client can tolerate gentle stress testing.

When Not to Use or When to Be Cautious

Use caution with acute trauma, suspected fracture, obvious deformity, marked swelling, severe pain, recent surgery, suspected dislocation, neurological symptoms or high irritability.

Do not force varus stress into pain or instability.

Equipment Required

Treatment table or chair
Pain and symptom scale
Measurz recording workflow
Optional comparison-side notes
Optional referral notes

Step-by-Step Protocol / Practice

Setup

Position the client sitting or supine with the arm supported.

Client position

The shoulder is relaxed. The elbow is placed at the selected angle, often slight flexion rather than full extension to allow joint stress testing.

Examiner/professional position

Stand beside the tested arm.

Hand placement

Stabilise the distal humerus with one hand. Hold the distal forearm or wrist with the other hand.

Stabilisation

Control the humerus to minimise shoulder movement and avoid unwanted rotation.

Movement or force direction

Apply a gradual varus force to the elbow by moving the forearm medially relative to the humerus.

Instructions

Ask the client to report lateral elbow pain, apprehension, instability, clicking, neurological symptoms and whether symptoms match their usual complaint.

Positive finding

A positive finding is familiar lateral elbow pain, apprehension, increased lateral opening or a soft endpoint compared with the other side.

Negative finding

A negative finding is no familiar pain, apprehension or meaningful side-to-side laxity.

Stopping criteria

Stop if pain increases sharply, instability is obvious, neurological symptoms appear, guarding prevents assessment or the client cannot tolerate the position.

Safety notes

Apply force gradually. Record pain, laxity and endpoint separately.

Positive and Negative Test Interpretation

A positive Elbow Varus Stress Test may increase suspicion of lateral elbow ligament involvement or lateral instability when it reproduces familiar lateral elbow symptoms or shows increased side-to-side laxity with a soft endpoint. It does not confirm a specific ligament injury on its own.

A positive response may also reflect pain guarding, radial head irritation, joint sensitivity, lateral elbow tendinopathy, prior trauma or broader posterolateral elbow instability. Interpretation is stronger when the result matches the injury mechanism, instability symptoms, side-to-side comparison and related elbow findings.

A negative test may decrease suspicion of static varus laxity in the tested position. However, it does not exclude lateral elbow instability, especially when symptoms occur only during loaded weight-bearing, speed, fatigue or more specific posterolateral rotatory instability positions.

Sensitivity, Specificity and Diagnostic Accuracy

At the time of writing, high-quality peer-reviewed diagnostic accuracy evidence reporting sensitivity, specificity or likelihood ratios for the static manual Elbow Varus Stress Test alone appears limited.

Condition or presentation: suspected lateral elbow ligament injury or lateral elbow instability
Population: not clearly established for the static manual test alone
Test variation: manual varus stress applied to the elbow at a selected flexion angle
Reference standard: not consistently established for the static manual test alone
Sensitivity: not available
Specificity: not available
Positive likelihood ratio: not available
Negative likelihood ratio: not available
Key limitations: examiner-dependent force, variable elbow angles, poor stand-alone evidence and overlap with posterolateral rotatory instability presentations

Recent research has explored sonographic posterolateral rotatory stress testing for posterolateral rotatory instability and reported promising accuracy using ultrasound-based comparison, but this is not the same as a manual static varus stress test. It supports the broader point that lateral elbow instability assessment may require more specific tests, comparison with the opposite side and imaging when clinically relevant.  

Reliability and Validity

Reliability depends on consistent elbow angle, forearm position, stabilisation, force direction, comparison side, endpoint grading and symptom criteria.

The test is more useful when the same examiner records the same position, force direction and interpretation criteria across sessions. Validity for the static test alone appears limited, so the result should be combined with history, trauma mechanism, elbow ROM, related instability tests and imaging or referral when appropriate.

Common Errors and Limitations

Common errors include applying force too quickly, failing to stabilise the humerus, not recording elbow angle, treating pain and laxity as the same finding, ignoring apprehension and using the test as a stand-alone ligament diagnosis.

Limitations include guarding, pain irritability, natural laxity, previous injury, examiner force variation and limited diagnostic accuracy evidence.

Practical Applications

Use the Elbow Varus Stress Test to document lateral elbow response to varus load. It can guide further assessment, referral reasoning, load modification and retesting if lateral stability is being monitored.

How to Record This in Measurz

Record test name, side tested, result as positive, negative, unclear or unable to test, pain score, symptom location, symptom quality, elbow angle, forearm position, varus force direction, force level, laxity, endpoint quality, apprehension, neurological symptoms, comparison side, confidence in result, irritability, compensations and reason for stopping.

Add related findings such as trauma mechanism, elbow ROM, weight-bearing symptoms, posterolateral instability tests, grip strength, Tinel’s Test, radial nerve symptoms and referral notes.

Related Tests / Internal Links

Elbow Valgus Stress Test
Elbow Quadrant Tests
Tinel’s Test
Grip Strength Test
Upper Limb Tension Tests
Cozen’s Test
Maudsley’s Test
Mill’s Test

FAQs

What does the Elbow Varus Stress Test assess?

It assesses lateral elbow pain, laxity and endpoint quality under varus loading.

What is a positive Elbow Varus Stress Test?

A positive result may include familiar lateral elbow pain, apprehension, increased lateral opening or a soft endpoint compared with the other side.

Does a positive test confirm a ligament tear?

No. It may increase suspicion, but it does not confirm a ligament tear on its own.

What does a negative test mean?

A negative result may reduce suspicion of static varus laxity in the tested position, but it does not exclude dynamic instability.

Why should pain and laxity be recorded separately?

Pain and laxity provide different information. Pain may reflect irritability, while laxity may suggest mechanical opening or endpoint change.

What should be recorded in Measurz?

Record elbow angle, force direction, pain, laxity, endpoint, apprehension, comparison side and stopping reason.

Key Takeaways

The Elbow Varus Stress Test assesses lateral elbow response to varus load.
A positive result may increase suspicion of lateral elbow instability when it matches the history and other findings.
Static manual diagnostic accuracy evidence appears limited.
Pain, laxity and endpoint quality should be recorded separately.
Measurz should capture position, force direction, symptoms and comparison side.

References

Zwerus, E. L., Somford, M. P., Maissan, F., Heisen, J., Eygendaal, D., & van den Bekerom, M. P. J. (2018). Physical examination of the elbow, what is the evidence? A systematic literature review. British Journal of Sports Medicine, 52(19), 1253–1260.