Tingling Fingers After Nineteen Days on the Breaker
A 34-year-old groundworks operative has spent the last 19 working days breaking out kerbs and concrete with a 28 kg petrol breaker, typically 4 to 5 hours of trigger time per shift with a 10-minute break each hour. The breaker is shared between three men and has no service record; its anti-vibration mounts are perished. The gloves provided are ordinary rigger's gloves. He tells the ganger that for a week his fingers have tingled and gone numb at night, that he has twice had to shake his hand to 'wake it up' in the morning, and that at the weekend the tips of his index and middle fingers turned white when he took a bag of ice from the freezer. The ganger says it is 'just the cold' and to keep going because the job is three days from completion. He has not seen a GP and there is no health surveillance on site.
1. What condition do these symptoms suggest, and why does it need action now rather than in three days' time?
Read the worked answer
This reads as hand-arm vibration syndrome (HAVS), with both of its main components showing:
- Neurological: tingling and numbness, worse at night, and the need to shake the hand to 'wake it up' in the morning.
- Vascular: the tips of the index and middle fingers turning white after holding a bag of ice - a blanching attack triggered by cold, which is the classic 'white finger' sign.
Why now: HAVS damage is cumulative and once established it is permanent. Continuing the same exposure does not plateau; it progresses, and later stages mean persistent numbness, loss of grip strength, and difficulty with fine work and with everyday tasks in cold weather. Nineteen days at 4–5 hours of trigger time on a 28 kg breaker with perished mounts is a very high exposure, and the symptoms have appeared within that window - which means the exposure is high enough to injure him, not just to annoy him.
Action: he should be referred to his GP and to occupational health, the symptoms should be formally recorded as a report of work-related ill health, and the employer should review the exposure and the risk assessment. This is a prescribed occupational disease, so the reporting duties need to be considered properly rather than left to the ganger.
2. The ganger says it is 'just the cold'. Why is that wrong, and what should the ganger have done?
Read the worked answer
Why it is wrong: everyone's fingers get cold, but they do not normally turn dead white in distinct patches after brief contact with a bag of ice. That blanching is a sign that the blood supply to the fingertips is being shut down abnormally, because vibration has damaged the small blood vessels and nerves. The combination of cold-triggered blanching with night-time numbness and morning 'shaking awake' is a recognised pattern, not a personality trait and not ordinary sensitivity to weather.
What the ganger should have done:
- Taken the report seriously and not dismissed it, because dismissing early symptoms is exactly how they become permanent.
- Recorded what was said, with the date, so there is a traceable report of a work-related health problem.
- Referred it up the line the same day and arranged for the man to see a GP or occupational health.
- Adjusted his work in the meantime - rotate him off the breaker, reduce trigger time, and give him other duties.
- Checked whether the other two men sharing the breaker have symptoms too. If one man has it after 19 days, the exposure is almost certainly affecting the others.
The ganger's response turns a manageable early case into a likely long-term one, and it leaves the employer exposed on both health and legal grounds.
3. Set out the controls you would put in place for the remaining three days and for future work.
Read the worked answer
Eliminate and substitute: the best control is to stop breaking concrete with a hand-held 28 kg petrol breaker. Use a machine-mounted hydraulic breaker, a larger excavator with a breaker attachment, or a different method such as controlled demolition or saw-cutting and lifting. Hand-held work should be the last resort, not the default.
Engineering: use the lowest-vibration tools available, with anti-vibration mounts in good condition. The perished mounts on this breaker effectively convert it into a high-vibration tool - it should come out of service until serviced. Keep cutting edges sharp and use the correct insertion tool.
Organise the work: set and record trigger-time limits and rotate between the three men so no one accumulates hours. The current pattern of 4–5 hours with a 10-minute break each hour is far too much. Give proper breaks away from the tool, not just pauses.
Keep hands warm and dry: warm, dry hands maintain circulation. Gloves help with warmth and with the cold trigger, but they do not block vibration - this must be said clearly, because the rigger's gloves may be creating a false sense of protection.
Health surveillance: baseline and regular checks with a questionnaire and referral where symptoms appear, so early signs are caught before they are permanent.
Also cover the other risks: noise from the breaker, dust and silica from concrete, and manual handling of a 28 kg tool. Train everyone to report symptoms early, and brief the ganger on why that report matters.