OEUK blood pressure assessment forms a routine part of the offshore medical. A high reading does not automatically mean that you cannot work offshore, but persistent or significantly elevated blood pressure may require further assessment before certification can be completed.
Written and medically reviewed by Dr Farah MacDonald | Occupational Health Physician & OEUK Registered Doctor | Updated September 2026
Blood pressure matters offshore because uncontrolled hypertension increases cardiovascular risk, while the remote environment can make treatment of an acute medical event more difficult.
Blood pressure forms part of the cardiovascular assessment undertaken during an OEUK medical.
Persistently elevated blood pressure increases the long-term risk of cardiovascular disease, including heart attack and stroke. In an offshore environment, the consequences of an acute medical event can be greater because workers are remote from hospital services and medical evacuation may take time.
The examining doctor therefore considers the blood-pressure reading alongside the worker’s medical history, treatment, symptoms and other cardiovascular risk factors.
The purpose is not simply to decide whether a single number is “normal”. The doctor is assessing whether the worker’s cardiovascular risk is compatible with safe offshore work.
Preparing for your medical? Read: How to Pass an OEUK Medical
No. A diagnosis of hypertension does not automatically make somebody unfit for offshore work.
Many offshore workers take medication for high blood pressure and can be certified when the condition is adequately controlled and treatment is stable.
The examining doctor considers factors such as:
Where the reading is higher than expected, further measurements or medical information may be required before a final certification decision is made.
OEUK blood pressure decisions are based on the overall cardiovascular risk rather than a single isolated reading.
Blood pressure can vary considerably during the day and can be influenced by anxiety, rushing to the appointment, pain, caffeine, nicotine, recent exercise and other factors.
If an initial reading is elevated, the doctor may allow time for you to rest and repeat the measurement.
A persistently elevated reading may require evidence of your usual blood pressure outside the clinic before certification can be completed.
This may include:
The aim is to establish whether the reading represents your usual blood pressure rather than relying on one isolated measurement.
Some people consistently record higher blood pressure in a medical or clinical setting than they do during normal daily life. This is commonly referred to as white-coat hypertension or a white-coat effect.
If you know that your clinic readings are frequently higher than your normal readings, bring recent documented home or GP measurements where available.
The examining doctor will decide what evidence is sufficient to demonstrate satisfactory blood-pressure control.
Yes. Taking antihypertensive medication does not automatically prevent offshore work.
The examining doctor considers whether the treatment is effective, stable and well tolerated.
Potential side effects such as dizziness, faintness or symptomatic low blood pressure may be relevant, particularly in safety-critical work.
Bring an accurate medication list showing the name and dose of each treatment you take.
Do not skip, reduce or take additional medication simply to change your blood-pressure reading for the medical.
A recent change in blood-pressure medication does not automatically prevent offshore certification.
However, the examining doctor may need to establish that the new treatment is effective, that blood pressure is becoming adequately controlled and that the medication is not causing significant side effects.
Where treatment has only recently started or changed, further readings or a short period of clinical follow-up may sometimes be useful before a final fitness decision is made.
Bring details of when your medication was started or changed, together with any recent blood-pressure readings if available.
Additional information may be required where blood pressure remains significantly elevated, control is uncertain or there is concern about associated cardiovascular or kidney disease.
Useful evidence may include:
The information required depends on the individual circumstances. Not every worker with hypertension will need specialist assessment.
Blood pressure is considered as part of the worker’s overall cardiovascular risk, rather than in isolation.
Other relevant factors may include:
This wider assessment helps the examining doctor consider the likelihood and potential consequences of a cardiovascular event occurring in the offshore environment.
If you have high blood pressure or think your reading may be elevated:
The aim is to allow the doctor to assess your usual blood-pressure control, rather than to obtain one artificially low reading on the day.
High blood pressure does not automatically mean that you cannot work offshore. The outcome depends on the degree of elevation, usual control, treatment, associated disease and overall cardiovascular risk.
A white-coat effect is common. Recent home, GP or ambulatory readings can help the examining doctor establish whether your usual blood pressure is lower outside the clinical setting.
In many cases, yes. The doctor considers whether treatment is stable, effective and free from side effects that could affect safe offshore work.
No. Continue prescribed treatment unless the clinician responsible for your care has advised otherwise.
Large amounts of caffeine shortly before blood-pressure measurement can temporarily raise readings in some people. Normal preparation and avoiding excessive caffeine immediately beforehand is reasonable.
Yes. Properly recorded recent home readings can be useful, particularly if you are known to have higher blood pressure in clinical settings.
Not simply because you have hypertension. An ECG or other cardiovascular investigation may be appropriate depending on your medical history, symptoms, examination findings and overall risk.
References:
Marina Medicals provides doctor-led OEUK medicals in Cardiff for offshore workers across South Wales and the wider UK energy sector.
If you are concerned about OEUK blood pressure requirements, bringing recent in-surgery documented readings can help the assessment proceed more efficiently.
