science

Jamshidi needle

Jamshidi needle 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 Jamshidi needle rather than just read about it. In short: The Jamshidi needle is a trephine needle for performing bone marrow biopsy, whereby a cylindrical sample of tissue, a core biopsy specimen, is obtained. It is a cylindrical needle with a tapered cutting tip.

Key takeaways

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

Reference excerpt

The Jamshidi needle is a trephine needle for performing bone marrow biopsy, whereby a cylindrical sample of tissue, a core biopsy specimen, is obtained. It is a cylindrical needle with a tapered cutting tip. The tapered end reduces the potential of crush artifact. It is the most commonly used needle for performing bone marrow biopsies. The device is named for its inventor Khosrow Jamshidi who is an Iranian physician. The Jamshidi interosseous needle has also been successfully used in pediatric patients, where a conventional intravenous line could not be established.

See also Instruments used in general surgery

References

Illustrations

Worked examples

Example 1 — a first encounter with Jamshidi needle

Start with the simplest possible case. Write down what Jamshidi needle 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 Jamshidi needle 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 Jamshidi needle 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 Jamshidi needle

In research: Jamshidi needle 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 Jamshidi needle 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: Jamshidi needle is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cutting tools, Medical equipment stubs, Surgical instruments, so understanding it makes those chapters shorter.
In everyday life: Look for Jamshidi needle 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.

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How to study Jamshidi needle in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Jamshidi needle 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 Jamshidi needle out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Jamshidi needle in simple terms?

Why does Jamshidi needle 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 Jamshidi needle?

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 Jamshidi needle.