When is a Tier 4 HAVS assessment required?

A Tier 4 assessment is usually arranged when symptoms are identified during routine surveillance.

This often follows a questionnaire or nurse review where concerns are raised.

Typical triggers

• Finger blanching

• Persistent tingling or numbness

• Reduced grip strength

• Repeated abnormal screening results

The assessment allows a decision to be made about fitness for vibration exposure.

Purpose of Tier 4

The assessment is not purely diagnostic. It provides occupational guidance:

• Can the employee continue exposure

• Are restrictions needed

• Is redeployment required

This allows employers to manage risk appropriately and continue surveillance safely.