science

Hume fracture

Hume fracture 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 Hume fracture rather than just read about it. In short: The Hume fracture is an injury of the elbow comprising a fracture of the olecranon with an associated anterior dislocation of the radial head which occurs in children. It was originally described as an undisplaced olecranon fracture, but more recently includes displaced fractures and can be considered a variant of the Monteggia fracture.

Key takeaways

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

Reference excerpt

The Hume fracture is an injury of the elbow comprising a fracture of the olecranon with an associated anterior dislocation of the radial head which occurs in children. It was originally described as an undisplaced olecranon fracture, but more recently includes displaced fractures and can be considered a variant of the Monteggia fracture. The injury was described in 1957 by A.C. Hume of the orthopaedic surgery department of St. Bartholomew's Hospital, Rochester.

Cause Although the precise mechanism of injury is unclear, the injury occurs in children who have fallen heavily with their arm trapped under the body. In his original description of the injury, Hume suggested that the injury occurred as a result of hyperextension of the elbow leading to fracture of the olecranon, with pronation of the forearm leading to the radial head dislocation.

Management In the original description by Hume, where the olecranon fractures were not displaced, treatment consisted of closed reduction of the radial head dislocation under general anaesthesia by supination of the forearm. This was followed by immobilisation of the arm in a plaster cast with the elbow flexed at 90° and the forearm in supination for 6 weeks. Where the olecranon fracture is displaced, open reduction internal fixation is recommended. Once the olecranon has been repaired, closed reduction of the radial head dislocation is usually possible. This is followed by immobilisation with the elbow flexed to 90° and the forearm in the neutral position. The duration of immobilisation depends on clinical assessment of the joint, and mobilisation may be possible after as little as 4 weeks.

References

External links

Worked examples

Example 1 — a first encounter with Hume fracture

Start with the simplest possible case. Write down what Hume fracture 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 Hume fracture 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 Hume fracture 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 Hume fracture

In research: Hume fracture 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 Hume fracture 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: Hume fracture is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bone fractures, so understanding it makes those chapters shorter.
In everyday life: Look for Hume fracture 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 Hume fracture in 20 minutes

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

Frequently asked questions

What is Hume fracture in simple terms?

Why does Hume fracture 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 Hume fracture?

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 Hume fracture.