Valsalva Test

The Valsalva Test (or Valsalva Maneuver) is an orthopedic and neurological screening used to assess for space-occupying lesions (such as a disc herniation, spinal tumor, or other causes of nerve root compression) in the spinal canal. It relies on the physiological effect of increased intraspinal and intrathoracic pressure to provoke symptoms if a lesion is present.

How is the Test Performed

• Client position: Seated or standing, arms relaxed.

• Instructions: The client is asked to take a deep breath and then bear down (as if trying to exhale forcefully against a closed glottis) for 2–3 seconds, simulating the effort used during a bowel movement.

• The therapist may ask the client to “blow against a closed mouth” or “brace as if lifting a very heavy object”.

• A positive test: Reproduction or worsening of the client’s spine- or nerve-related symptoms—commonly radiating arm, leg, neck, or back pain, tingling, or weakness.

• A negative test: No increase in symptoms (useful in ruling out some compressive lesions).

Clinical Significance

• The Valsalva Test increases pressure inside the spinal canal; if a lesion is present (e.g., herniated disc, tumor, or other mass), it can further compress the nerve root or spinal cord, reproducing symptoms.

• Useful in differentiating radiculopathy or myelopathy from non-neurological or soft-tissue pain syndromes.

• In cervical regions, a positive test may indicate cervical radiculopathy; in lumbar regions, it supports diagnosis of disc herniation with nerve root involvement.

Assessment

• Use for clients presenting with unexplained radiating limb pain, numbness, tingling, or neurological symptoms associated with spinal movement.

• It is part of a cluster of special tests (e.g., SLR, Slump, Kemp’s) for suspected nerve root or spinal cord compression.

Treatment

• If positive:

  • Avoid deep tissue work, heavy mobilization, or forced stretching near the spine that could exacerbate nerve or spinal compression.

  • Focus on gentle pain-modifying strategies, soft tissue mobilization distant from the site of provocation, and posture correction as tolerated.

  • Educate clients about avoiding activities that increase intra-abdominal/ spinal pressure (heavy lifting, bearing down) if these worsen symptoms.

• Ensure thorough documentation of symptom onset, type, and region during the test.

Safety and Referral

• Refer for further medical/neurological assessment if the test is positive and/or neurological symptoms are severe, progressive, or associated with weakness, loss of bowel/bladder control, or major functional limitations.

• Caution: The test is generally safe but should be used with care in clients with cardiovascular disease, retinopathy, or increased intracranial pressure.