science

Tenosynovitis

Tenosynovitis 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 Tenosynovitis rather than just read about it. In short: Tenosynovitis is the inflammation of the fluid-filled sheath (called the synovium) that surrounds a tendon, typically leading to joint pain, swelling, and stiffness. Tenosynovitis can be either infectious or noninfectious.

Key takeaways

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

Reference excerpt

Tenosynovitis is the inflammation of the fluid-filled sheath (called the synovium) that surrounds a tendon, typically leading to joint pain, swelling, and stiffness. Tenosynovitis can be either infectious or noninfectious. Common clinical manifestations of noninfectious tenosynovitis include de Quervain tendinopathy and stenosing tenosynovitis (more commonly known as trigger finger).

Signs and symptoms Infectious tenosynovitis in 2.5% to 9.4% of all hand infections. Kanavel's cardinal signs are used to diagnose infectious tenosynovitis. They are: tenderness to touch along the flexor aspect of the finger, fusiform enlargement of the affected finger, the finger being held in slight flexion at rest, and severe pain with passive extension. Fever may also be present, but is uncommon.

Pathogenesis Infectious tenosynovitis is the infection of closed synovial sheaths in the flexor tendons of the fingers. It is usually caused by trauma, but bacteria can spread from other sites of the body. Although tenosynovitis usually affects the flexor tendon of the fingers, the disease can also affect the extensor tendons occasionally. The clinical presentation is therefore as acute infection following trauma. The infection can be mono- or polymicrobial and can vary depending on the nature of the trauma. The most common pathogenic agent is Staphylococcus aureus introduced from the skin. Other bacteria linked to infectious tenosynovitis include Pasteurella multocida (associated with animal bites), Eikenella spp. (associated with IV drug use), and Mycobacterium marinum (associated with wounds exposed to fresh or salt water). Additionally, sexually active patients are at risk for hematogenous spread due to Neisseria gonorrhoeae (see infectious arthritis). Common noninfectious tenosynovitis are: stenosing tenosynovitis, intersection syndrome, extensor pollicis longus (EPL) tenosynovitis, de Quervain's and fourth compartment tenosynovitis.

Diagnosis Diagnosis of tenosynovitis is typically made clinically after a thorough patient history and physical exam. Aspirated fluid can also be cultured to identify the infectious organism. X-rays are typically unremarkable but can help rule out a broken bone or a foreign body

Treatment The mainstay of treatment for infectious tenosynovitis includes symptom relief, antibiotic therapy, and surgery. Early recognition of the disease with early initiation of antibiotics are important for better range of movement of the affected finger. Minimally invasive procedures into the flexor tendon sheath such as catheter irrigation give better outcomes (74% chance of good outcome) when compared to open surgery (26% chance of good outcome). However, wound irrigation with antibiotics has no clear benefits. Most infectious tenosynovitis cases should be managed with tendon sheath irrigation and drainage, with or without debridement of surrounding necrotic tissue, along with treatment with broad-spectrum antibiotics. In severe cases, amputation may even be necessary to prevent the further spread of infection. Following surgical intervention, antibiotic therapy is continued and adjusted based on the results of the fluid culture.

Prognosis The earlier the condition is identified, the better the chance of getting full range of motion of the finger. However, finger stiffness, Boutonniere deformity, deep space infection, tendon necrosis, adhesions, persistent infection, and need for amputation of the finger can occur. Tendon adhesion and finger stiffness are caused by the violation of the flexor tendon sheath.

See also Synovitis DeQuervain's syndrome Remitting seronegative symmetrical synovitis with pitting edema

Notes

External links

http://orthoinfo.aaos.org MediLine Plus

Illustrations

Worked examples

Example 1 — a first encounter with Tenosynovitis

Start with the simplest possible case. Write down what Tenosynovitis 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 Tenosynovitis 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 Tenosynovitis 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 Tenosynovitis

In research: Tenosynovitis 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 Tenosynovitis 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: Tenosynovitis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Disorders of synovium and tendon, Inflammations, so understanding it makes those chapters shorter.
In everyday life: Look for Tenosynovitis 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 Tenosynovitis in 20 minutes

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

Frequently asked questions

What is Tenosynovitis in simple terms?

Why does Tenosynovitis 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 Tenosynovitis?

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 Tenosynovitis.