Anesthesiology and Pain Medicine

Anaesthesiology is the medical specialty responsible for anaesthesia, the controlled and reversible loss of sensation or awareness that makes surgery possible. Anaesthesiologists assess patients before an operation, plan and give the anaesthetic, watch every vital function during the procedure and manage pain and recovery afterwards, often in the recovery unit and in intensive care. Pain medicine, sometimes called algology, grew out of this work: the techniques used to block pain during surgery, such as placing local anaesthetic around nerves, are adapted to diagnose and treat pain that has lasted for months or years. Chronic pain is more than a symptom, because it affects sleep, mood, work and relationships, so pain specialists often work with spine surgeons, neurologists, rehabilitation physicians, physiotherapists and psychologists. The aim is not always to remove pain completely, but to reduce it enough to restore function and quality of life.

On the anaesthesia side, the specialty serves every surgical patient, with particular care for people with heart or lung disease, sleep apnoea, obesity, diabetes, a difficult airway or a previous problem with anaesthesia, as well as children and older adults. Sub-specialties include regional anaesthesia, which numbs one part of the body with nerve blocks or a spinal or epidural injection, and anaesthesia for heart, brain, children's and obstetric procedures. In pain medicine, the common conditions are chronic low back and neck pain from discs or facet joints, sciatica and other nerve root pain, persistent pain after spine surgery, sacroiliac joint pain, knee and hip pain from arthritis, nerve pain after shingles or injury, complex regional pain syndrome, headache and facial pain such as trigeminal neuralgia, and pain related to cancer. Cancer pain care often runs alongside oncology and palliative care teams.

For surgery, the anaesthetist chooses between general anaesthesia, in which you are fully asleep; regional anaesthesia, such as a spinal or a nerve block that numbs part of the body; sedation; and local anaesthesia, often combining them to reduce the need for strong pain medicines afterwards. In pain medicine, treatment follows a stepped approach. Medicines and physical therapy usually come first. Image-guided injections then deliver local anaesthetic and steroid close to an inflamed nerve root or joint, as in epidural or facet joint injections. If a diagnostic medial branch block confirms that a facet joint is the source, radiofrequency ablation uses heat to switch off the small nerve that carries that pain, with relief often lasting many months and the option to repeat it. For severe nerve pain that has not responded, spinal cord stimulation uses a small implanted device to change how pain signals reach the brain.

Anaesthesia planning starts with a pre-operative assessment: your history, an examination of your airway, heart and lungs, a review of all your medicines and, depending on your age and health, blood tests, an ECG and sometimes a heart scan or lung function test. In pain medicine, diagnosis combines a detailed history, a physical examination and a review of imaging such as MRI and CT, but imaging alone often cannot show which structure causes the pain, because many changes seen on scans cause no symptoms. Diagnostic blocks answer this question: a small amount of local anaesthetic is placed at one nerve or joint, and your response is recorded over the following hours. Procedures are guided by fluoroscopy (live X-ray), ultrasound or CT, which allows the needle to be placed precisely. Nerve conduction studies and questionnaires measuring pain and function help track results over time.

If you are travelling for surgery, you will meet the anaesthesia team before the operation, but sending your records, medicine list and any previous anaesthetic history in advance helps them plan. Some medicines may need to be adjusted or paused beforehand, including blood thinners, some diabetes medicines and weekly weight-loss injections, so ask your coordinator early. For pain treatment, send recent MRI or CT scans and a summary of what has already been tried. Most injections and radiofrequency procedures are day-case, and many patients plan a stay of a few days so that a diagnostic block, the main procedure and a check-up fit into one trip. A spinal cord stimulator trial usually lasts about five to ten days, and a permanent implant needs a wound check before flying, so plan a longer stay or a second visit. Interpreter and international patient support is commonly available.