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Lumbar laminectomy and discectomy: an OR 101 guide

Lumbar laminectomy and discectomy: an OR 101 guide

RODNIE ORO
Surgery

Reviewed by Rodnie Oro, cath lab charge nurse · Last reviewed: October 2026 · Education only, not medical advice

Lumbar decompression in one minute

What it is: surgery to take pressure off trapped nerves in the lower back by removing part of the bone (laminectomy) or a bulging disc (discectomy).

Who it is for: people with sciatica from a disc prolapse, or spinal stenosis causing leg pain, that has not settled.

Main risks: nerve injury, a tear in the nerve lining, infection, bleeding, symptoms coming back.

Usually: under general anaesthetic, 1–2 hours, home the same day to 2 days.

On this page: What are lumbar laminectomy and discectomy? · Who is it for? · When is it done? · Step by step · Recovery · Risks · Kit list · First time in theatre? · FAQ

Side diagram of the lower spine with a disc bulging backwards and pressing on the nerve

What are lumbar laminectomy and discectomy?

Nerves run down the spinal canal and exit between the vertebrae. They can be squeezed by:

  • a disc prolapse (slipped disc), which causes sciatica; treated with discectomy, often microdiscectomy using a microscope
  • spinal stenosis, narrowing from thickened bone, joints and ligaments; treated with laminectomy (removing the back of the vertebra) or a smaller decompression

The aim is to relieve leg pain. Back pain may improve less. Most sciatica settles without surgery, so it is offered when symptoms persist or nerves are at risk.

New to the acronyms? See the Cath Lab Abbreviations A–Z.

Who is it for?

It may be considered for people with:

  • sciatica from a disc prolapse that has not settled with other treatment
  • spinal stenosis with leg pain on walking
  • weakness or other nerve problems from compression
  • cauda equina syndrome (emergency)

The decision is made by your surgical team, who will talk through the reasons, the alternatives and the risks with you.

When is it done?

Most operations are planned; some are urgent. Before it, you usually have:

  • an examination and X-rays, and sometimes a CT or MRI scan
  • blood tests and, for bigger operations, an ECG
  • a review of your medicines, especially blood thinners, as per centre protocol
  • fasting instructions
  • a chance to ask questions and give consent
Timeline of the usual steps before lumbar decompression: Clinic: Assessment, X-rays, consent, Pre-assessment: Bloods, medicines, On the day: Site marked, WHO sign in, In theatre: About 1–2 hours

Step by step

1. Getting ready

Team brief and WHO checklist first, including the implant check and confirming the site and side marking. The anaesthetic team and ODP give the anaesthetic (general, as per centre protocol); antibiotics and blood-clot prevention are given as per centre protocol. The circulating practitioner checks positioning and pressure areas, the diathermy plate, warming, and radiation protection if X-ray is used. The scrub practitioner checks implant and instrument trays are complete and sterile, and does the first count. Theatre traffic is kept to a minimum, especially in laminar-flow theatres.

2. Access

The patient lies prone on a frame. A cut is made in the middle of the lower back over the level, confirmed on X-ray; a microscope or loupes are used, per surgeon.

Side diagram of the lower spine showing a short incision over one level at the back

3. Freeing the nerve

  • A. Level confirmed. The correct level is marked and checked with X-ray.
  • B. Bone removed. A window of bone and ligament is removed (laminotomy or laminectomy).
  • C. Disc removed. For discectomy, the nerve is moved gently aside and the bulging disc fragment removed.
  • D. Nerve free. The surgeon checks the nerve is free before closing.
Four-panel schematic of lumbar decompression: level confirmed, bone removed, disc removed, nerve free

4. Finishing

Bleeding is controlled, and the muscles and skin are closed. A drain is used occasionally, per surgeon. Final counts are confirmed, implant details recorded, and the patient goes to recovery with a full handover, including limb checks (circulation and nerves), as per centre protocol.

Recovery and aftercare

  • First hours: in recovery; checks of leg movement and feeling.
  • Going home: often the same day or the next.
  • Walking: start walking early; avoid heavy lifting and long sitting for a few weeks.
  • Pain: leg pain often improves quickly; some numbness may take longer.
  • Work: often 2–6 weeks off depending on the job.
  • Follow-up: as per centre protocol.

Call 999 if you have chest pain or sudden breathlessness. Contact your team if you have increasing pain, a cold, numb or very swollen limb, calf pain, fever, or a wound that becomes red, hot or leaky.

Risks and complications

Your team will explain the risks that apply to you. Possible problems include:

  • a tear in the lining around the nerves (dural tear)
  • nerve injury causing numbness or weakness (uncommon)
  • wound infection
  • bleeding
  • symptoms coming back (recurrent disc prolapse)
  • blood clots in the legs or lungs

Theatre kit list (printable)

Example kit list

Every theatre has its own protocol, and sizes and doses vary.

  • spinal decompression instrument set (rongeurs, punches, nerve hooks)
  • operating microscope or loupes and headlight, per surgeon
  • image intensifier and radiation protection
  • high-speed burr
  • bipolar diathermy and haemostatic agents, per surgeon
  • spinal frame and padding
  • closure sutures and dressings
Generic drawings of the main kit: self-retaining retractor, image intensifier, power drill, fine suture

Procedural steps

  • Team brief, WHO sign in; level and side check; anaesthesia
  • Prone positioning on frame; padding; prep and drape; count
  • X-ray level check; incision
  • Bone and ligament removed; nerve protected
  • Disc fragment removed or canal decompressed; nerve checked
  • Haemostasis; closure; counts; specimen check; careful turn; sign out and handover
Recovery timeline after lumbar decompression: Day 0: Recovery, leg checks, Days 0–2: Home for most, 2–6 weeks: Back to work, gradually, Weeks: Clinic if needed

First time in theatre?

đź’ˇ First-time tip

  • Implant check. Read back the implant type, side and size before opening, and record it in the implant log.
  • Site and side. Check the marking at sign in and again before the cut.
  • Counts matter. Swabs, needles, instruments and small implant parts are counted; speak up if one is missing.
  • Radiation safety. Wear lead and a dosimeter when X-ray is used, and keep your distance.
  • Prone checks. Check eyes, face, chest and pressure points are padded and free after turning.

FAQ

Will it cure my back pain?

It is mainly for leg pain; back pain may improve less.

Can the disc slip again?

Sometimes. Your team will advise on activity.

Is it keyhole?

Many are done through small cuts with a microscope.

Sources

All checked on 14 October 2026. Each page's own date is shown where it gives one.

Disclaimer

Education only. This page is for general education for healthcare students, theatre staff and curious readers. It isn't medical advice and doesn't replace advice from your own doctor, surgical team or local unit protocols. Equipment and medicines are described generically. No product or manufacturer is recommended. If you think someone is having a medical emergency, call 999.

Disclosure: I work in the medical device industry. This page is independent education and isn't sponsored or reviewed by any company.

All diagrams on this page are original illustrations created for rodnieoro.com.

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