science

Lumbar provocative discography

Lumbar provocative discography is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Lumbar provocative discography rather than just read about it. In short: Lumbar provocative discography (also referred to as "discography" or discogram) is an invasive diagnostic procedure for evaluation for intervertebral disc pathology. It is usually reserved for persons with persistent, severe low back pain (LBP) who have abnormal spaces between vertebrae on magnetic resonance imaging (MRI), where other diagnostic tests have failed to reveal clear confirmation of a suspected disc as t…

Key takeaways

Lumbar provocative discography belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Lumbar provocative discography to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Lumbar provocative discography from memory before moving on to harder problems.

Reference excerpt

Lumbar provocative discography (also referred to as "discography" or discogram) is an invasive diagnostic procedure for evaluation for intervertebral disc pathology. It is usually reserved for persons with persistent, severe low back pain (LBP) who have abnormal spaces between vertebrae on magnetic resonance imaging (MRI), where other diagnostic tests have failed to reveal clear confirmation of a suspected disc as the source of pain, and surgical intervention is being considered.

Uses Spinal MRI is the imaging of choice to investigate the spine and intervertebral discs. Meanwhile, lumbar discography is used to demonstrate degeneration and herniation of lumbar intervertebral discs by injecting a dye into the nucleus pulposus of the discs. The procedure is also used to reproduce pain back pain for those who have such symptoms. Lumbar discography is also used to access the response of a subject to anaesthetic injection. Other uses include suspected discogenic pain without radicular sign (pain travelling to lower limbs along a dermatome) and confirmation of normal intervertebral discs above and below a site before spinal fusion. However, evidence supporting the usefulness of lumbar discography in recognizing intervertebral disc problems is limited. There is no role for cervical or thoracic discography in diagnosing disc pathologies at the cervical or thoracic regions. For those with local or distant sepsis, lumbar discography can add to the risk of infective discitis. Those with co-morbities that caused them not to be suitable candidate for surgery is also relatively contraindicated for this procedure.

Procedure Non-ionic contrast media such as iopamidol and iohexol are used. Needles are inserted through the back into the disc near the suspect area, guided by fluoroscopic imaging. Fluid is then injected to pressurize the disc, and any pain responses are recorded.

This is repeated in random order for the various discs, without the patient knowing which disc is pressurized. This can be used to detect patients who may be exaggerating their symptoms, or to assess their pain response and hence their suitability for recovery from possible surgery (often a Discectomy). A contrast agent is introduced, and after the procedure, a CT scan identifies leakage from the discs to identify any spinal disc herniation. Possible complications include nerve damage, discitis, an infection of the disc. Strong antibiotics are usually administered as a precaution. Its use in predicting surgical outcomes is sometimes controversial.

History Lindgren from Scandinavia first performed a puncture of normal intervertebral disc for diagnostic purposes in 1941.

References

Illustrations

Worked examples

Example 1 — a first encounter with Lumbar provocative discography

Start with the simplest possible case. Write down what Lumbar provocative discography claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Lumbar provocative discography before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Lumbar provocative discography ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Lumbar provocative discography

In research: Lumbar provocative discography appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Lumbar provocative discography in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Lumbar provocative discography is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bones of the vertebral column, Medical diagnostic stubs, Surgical procedures and techniques, so understanding it makes those chapters shorter.
In everyday life: Look for Lumbar provocative discography outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Lumbar provocative discography” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Lumbar provocative discography in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Lumbar provocative discography means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Lumbar provocative discography out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Lumbar provocative discography in simple terms?

Why does Lumbar provocative discography matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Lumbar provocative discography?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Lumbar provocative discography.