What Is Microsurgery? How Tiny Vessels Get Reconnected
Some of the most remarkable operations in surgery involve structures thinner than a matchstick, joined under a microscope, stitch by stitch.
Surgery Under Magnification
Microsurgery is less a separate specialty than a technique: operating under an operating microscope, with instruments finer than a sewing needle and sutures thinner than a human hair. It allows surgeons to join blood vessels and nerves just one to two millimetres wide, structures invisible to the naked eye.
The skills take years to develop. Dr Ashok Reddy's training as a hand and microvascular surgeon includes this discipline, and at AR Plastic Surgery it underpins everything from fingertip replantation to complex reconstruction after trauma.
The operating microscope magnifies the field many times over, and the surgeon works with both hands steadied on rests. Even breathing is controlled; this is surgery at its most deliberate, where millimetres decide outcomes.
What 1-2 mm Vessels Make Possible
Reconnecting tiny vessels is what makes replantation possible: a severed finger or hand segment can be reattached, with arteries, veins, nerves and tendons each repaired in turn, restoring blood flow to tissue that would otherwise be lost.
The same technique enables free-flap reconstruction, moving skin, muscle or bone from one part of the body to another and reconnecting its blood supply at the new site. This allows rebuilding after severe trauma, burns or cancer surgery, using the patient's own living tissue.
Nerve repair is the quieter half of microsurgery. Joining a divided nerve under magnification aims to restore feeling and movement, though nerves regrow slowly and recovery is measured in months, with results that vary from person to person.
Where Microsurgery Matters Most
Hand trauma is microsurgery's most urgent stage. A cleanly severed digit, a degloving injury, a crushed forearm with damaged vessels, these are injuries where the microscope can mean the difference between saving and losing function.
Beyond emergencies, microsurgery rebuilds after planned surgery too: filling defects left by tumour removal, restoring coverage over exposed bone or tendon, and repairing nerves whose injury would otherwise mean lasting numbness or weakness.
What Patients Should Know
These are long, demanding operations, often lasting several hours and performed by a specialised team. Afterwards, the repaired tissue is monitored closely, since blood flow in the first days is critical and patients stay under careful observation.
Outcomes vary with the nature of the injury, the time elapsed before surgery and individual healing. What microsurgery offers is possibility: function and tissue preserved that a generation ago would simply have been lost. Ask your surgeon candidly what it can offer in your specific case.
Because the work is so fine, patient selection and timing matter enormously. A clean cut repaired promptly generally offers more possibility than a contaminated crush seen late, which is why serious hand injuries should reach a microsurgeon without delay.
Common questions
Is microsurgery done with robots?
No. Despite the name, microsurgery is performed by the surgeon's own hands, using an operating microscope for magnification and ultra-fine instruments. It is a manual skill refined over years of training, not an automated process.
How small are the structures involved?
Typically one to two millimetres in diameter for blood vessels, roughly the width of a pinhead. Nerves of similar size are repaired the same way, and the sutures used are finer than a human hair.
Does every severed finger get replanted?
Not every case is suitable. The decision depends on the level and nature of the injury, contamination, the time since injury and the patient's overall condition. A hand and microsurgeon assesses each case individually and advises honestly.
How long is recovery after microsurgery?
It varies widely by procedure. Replanted digits need weeks of protected healing followed by guided therapy, while free-flap patients recover in stages. Your surgical team will outline what to expect for your situation.
Not sure which treatment is right for you?
Every plan at AR Plastic Surgery starts with an honest consultation — what surgery can and cannot do, explained before anything is decided.