High-dependency care (HDU)

What is high-dependency care (HDU)?

A high-dependency unit (HDU) is a part of the hospital for people who need closer monitoring and more support than a normal ward can give, but who are not so unwell that they need full intensive care. It is sometimes called level 2 care, and it sits between a general ward and the intensive care unit (ICU).

People are often in HDU after major surgery, or because one part of the body — such as the heart, kidneys or breathing — needs extra support and very close watching. Unlike in ICU, most HDU patients are awake and not on a breathing machine, though they may be on oxygen, drips and monitors.

In HDU, one nurse usually looks after two patients, and observations such as blood pressure, heart rate and oxygen are checked very often. This means problems can be spotted and treated early.

Moving to HDU can be a 'step up' from a ward if someone becomes more unwell, or a 'step down' from intensive care as they recover. A move from ICU to HDU is usually a good sign that someone is getting better.

Types, options & approaches

There may be different ways to do this. The right approach depends on the clinical question and your circumstances.

Ward, HDU and ICU compared

People often move between ward, HDU and ICU as their condition changes. The boundaries are not rigid.

Preparing for your treatment

• If HDU is planned after surgery, the team will tell you beforehand; it is a normal, sensible part of recovering from a big operation.
• Bring glasses, hearing aids, dentures and a few familiar items, as the person will usually be awake.
• Agree one main family contact to ring the unit and update everyone else.
• Ask about visiting times, which can differ from a normal ward.
• Tell the team about regular medicines, allergies and any breathing or heart problems.
• Ask the team what the plan is and what 'stepping down' to a ward will depend on.

What happens

In HDU, the person is connected to monitors that show heart rate, blood pressure and oxygen levels, and these are checked very frequently. They may have oxygen through a mask or nasal tube, one or more drips, and sometimes a fine tube (line) in an artery or large vein to measure pressures and take blood easily.

Most people in HDU are awake and able to talk, though they may be sleepy, in some pain, or tired after an operation or illness. Nurses help with pain relief, fluids, and getting moving again when it is safe.

The critical care team reviews each patient every day, adjusts treatment, and decides when someone is well enough to move to a ward. If a person becomes more unwell, they can be moved up to intensive care quickly.

Families are usually able to visit and talk with the person, and the team will explain the plan and answer questions.

Is this treatment right for me?

A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.

Before you decide

Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.

The main risks come from the underlying illness or operation rather than from HDU care itself, which is designed to make care safer. Ask the team what they are watching for, what would mean a 'step up' to intensive care, and what needs to happen before a 'step down' to a ward.

Published figures to discuss

High-dependency care is a level of monitoring and support rather than a single procedure, so it does not carry one set of complication rates. Risks depend on the underlying illness or operation, the person's health beforehand, and how long support is needed. The team's daily assessment of progress is more useful than a general figure. Confusion and disturbed sleep are common in any critical care setting, and infection or clots are recognised risks of being unwell and less active.

These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.

What happens afterwards

HDU is usually a short stage in a longer recovery. Many people move to a ward within a day or two, though recovery from the original illness or operation continues for longer.

• Tiredness and broken sleep after a busy, closely monitored unit
• Soreness or pain that is managed with regular pain relief
• Feeling weak or wobbly when first getting up after illness or surgery
• Some short-lived confusion, especially in older people, that settles

Aftercare

• Follow the recovery plan for the illness or operation that led to the HDU stay.
• Build up movement and activity gradually, with help from physiotherapists.
• Take pain relief as advised so you can move, breathe deeply and recover well.
• Eat and drink as guided to help the body heal and regain strength.
• Watch for and report signs of infection, breathlessness or a swollen, painful calf.
• Keep follow-up appointments for the underlying problem.
• Ask for support if you feel low or anxious after a stay in critical care.

• One main family contact and unit phone number saved
• Glasses, hearing aids and dentures brought in
• List of regular medicines and allergies shared with the team
• Familiar items or photos for comfort
• Questions written down for the daily team review
• Recovery and follow-up plan for the original illness or operation
• Clinic or GP contact details saved for after discharge

⚠ Get urgent help if…

• While in hospital, the HDU team watches for problems around the clock — you do not need to monitor the machines yourself.
• After discharge, seek urgent help for new severe breathlessness or chest pain — call 999 if severe.
• Get same-day advice for a high temperature with shivering, which can signal infection.
• Report a hot, swollen or painful calf, which can signal a blood clot.
• Contact your team if pain, a wound or your general recovery is clearly getting worse.
• Seek help for persistent low mood, anxiety or distressing memories after critical care.

Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.

General guidance — it doesn't replace the specific advice your specialist gives you.

Results & realistic expectations

A good result from high-dependency care is that the person is closely supported through a risky period — such as the first days after major surgery — and any problems are caught and treated early, so they recover and step down to a ward safely.

HDU supports the body and watches closely, but it cannot change the underlying illness or guarantee an outcome. The team's day-by-day view of how someone is doing is the most useful guide to progress.

How well someone recovers depends mostly on the illness or operation that led to the HDU stay, and on their health beforehand. HDU itself is a short, supportive stage; the longer recovery relates to the underlying problem and any rehabilitation needed afterwards.

Related tests, treatments or support

High-dependency care often follows major surgery or runs alongside treatment of a serious illness — for example supporting blood pressure or breathing while infection is treated (see sepsis management). It can be a step down from intensive care or a step up from a ward, depending on how the person is doing.

Follow-up & long-term care

Follow-up is usually arranged for the original illness or operation rather than for the HDU stay itself — for example a surgical review, scans or further treatment. Some people who were also in intensive care may be offered a critical care follow-up clinic to help with recovery.

• Keep up any physiotherapy or rehabilitation started in hospital.
• Attend follow-up appointments for the underlying illness or surgery.
• Build strength and activity back gradually over the following weeks.
• Tell the GP about ongoing low mood, anxiety or memory problems after critical care.

Repeat, follow-on and what comes next

• People may step up to intensive care and back down to HDU more than once as their condition changes.
• A step down to a ward is the goal, but sometimes happens later than first hoped.
• Plans are reviewed daily and adjusted; recovery is not always a straight line.
• Returning to HDU after going to a ward does not mean anything has gone wrong — it is sometimes a sensible, safe step.

Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.

What good aftercare looks like

• A clear plan for stepping down to a ward and then home.
• Good pain control and early help to move and breathe deeply.
• A single point of contact for family and regular updates.
• Follow-up arranged for the underlying illness or operation.
• Information and support for the emotional after-effects of critical care where needed.

What affects the cost

Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:

• HDU is usually NHS-funded care, so most families will never see a bill for it.
• Where private level 2 care exists, the length of the HDU stay is a main cost driver.
• The amount of monitoring, drips, oxygen and organ support needed affects cost.
• Specialist nursing (about one nurse to two patients) is a significant cost.
• Drugs, tests, scans and any procedures are usually billed in addition.
• Whether a step up to intensive care is needed changes the level and cost of care.

• For NHS care, there is no charge — ask about practical support such as parking and travel.
• If care is private, ask what the daily high-dependency fee includes.
• Ask whether consultant fees, drugs, tests and procedures are billed separately.
• Ask what happens if a step up to full intensive care becomes necessary.
• Ask how follow-up for the underlying illness or operation is arranged.
• Ask who to contact about any insurance or billing questions.

On the NHS? High-dependency care is almost always provided by the NHS, often after emergency illness or major surgery; some private hospitals offer level 2 care, usually after major planned operations.

You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.

Consent traps and marketing red flags

These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.

Choosing a specialist safely

• Check the specialist is on the GMC Specialist Register for this area.
• Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
• You're entitled to time to consider and to have your questions answered before you agree — the specialist who looks after you should explain it, not a salesperson.
• Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
• You're entitled to your total cost in writing — including any follow-up — before you decide.

How Vuemedics verifies every consultant →

Take this to your consultation. A good specialist will welcome every one of these.

• Why does my relative need HDU rather than a normal ward right now?
• Which body system are you supporting and monitoring most closely?
• What needs to happen before stepping down to a ward?
• What would mean a step up to intensive care?
• How is pain and comfort being managed?
• Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
• Will you be the specialist who carries out my treatment, and who looks after me afterwards?
• What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
• What does a realistic result look like — and what can this treatment not achieve?
• What are my options, including waiting, doing nothing for now, or choosing a different approach?
• Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
• What is the total cost in writing, including any follow-ups, and how much time do I have to decide?

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How we made this page

Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →

Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.

Sources & standards: Intensive Care Society — Levels of adult critical care ICUsteps — Intensive care: a guide for patients and relatives Faculty of Intensive Care Medicine — Guidelines for the Provision of Intensive Care Services (GPICS) NHS England — Adult critical care service specification NICE CG83 — Rehabilitation after critical illness in adults

Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.

Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.