What is the numerical threshold for tachypnoea in an adult?

In a resting adult, a respiratory rate greater than 20 breaths per minute is generally considered tachypnoea.

Is tachypnoea the same as hyperventilation?

No. Tachypnoea is specifically an increased *rate* of breathing. Hyperventilation is increased *minute ventilation* (tidal volume x rate), which can lead to low carbon dioxide levels (hypocapnia). Tachypnoea can occur without hyperventilation if breaths are shallow.

Can I use 'tachypnoea' in everyday conversation?

It is highly unusual and would sound overly clinical. In everyday contexts, phrases like 'breathing very fast,' 'panting,' or 'short of breath' are more appropriate and understandable.

What are common causes of tachypnoea?

Common causes include lung diseases (pneumonia, asthma, COPD), heart failure, fever, pain, anxiety, metabolic acidosis (e.g., from diabetes), and severe anaemia.

tachypnoea

Low (Technical)

UK/ˌtækɪpˈniːə/US/ˌtækɪpˈniːə/

Medical/Clinical

My Flashcards

Definition

Meaning

Abnormally rapid breathing.

A medical sign characterized by a respiratory rate exceeding the normal range for a person's age and physiological state. It is not a disease itself but a symptom of various underlying conditions, often indicating respiratory distress, metabolic acidosis, or other systemic issues.

Linguistics

Semantic Notes

Primarily a clinical term used to objectively describe a patient's breathing rate. It has a specific, measurable definition (e.g., >20 breaths/minute in adults) and is distinct from subjective feelings of breathlessness (dyspnoea). The spelling 'tachypnea' is more common in American English.

Dialectal Variation

British vs American Usage

Differences

The primary difference is orthographic: British English favours 'tachypnoea' (retaining the 'oe' digraph from Greek), while American English uses 'tachypnea'. The pronunciation difference follows the spelling.

Connotations

Identical clinical connotations in both varieties.

Frequency

The term is low-frequency in both varieties, confined almost exclusively to medical contexts. The American spelling 'tachypnea' is the global standard in most international medical journals.

Vocabulary

Collocations

strong

severe tachypnoeapatient presented with tachypnoeaneonatal tachypnoeapersistent tachypnoea

medium

cause of tachypnoeasign of tachypnoeatachypnoea and tachycardiatachypnoea developed

weak

acute tachypnoeamild tachypnoeaobserved tachypnoeatachypnoea noted

Grammar

Valency Patterns

Patient + experience/develop/present with + tachypnoeaTachypnoea + is + a sign/symptom of + conditionTachypnoea + accompanied by + tachycardia/fever

Vocabulary

Synonyms

Strong

hyperventilation (Note: technically different, as hyperventilation implies increased minute ventilation, often with altered blood gases)

Neutral

rapid breathingincreased respiratory rate

Weak

polypnoea (rarely used)fast breathing (lay term)

Vocabulary

Antonyms

bradypnoea (abnormally slow breathing)eupnoea (normal, good breathing)

Phrases

Idioms & Phrases

“N/A (Technical term lacks idiomatic use)”

Usage

Context Usage

Business

N/A

Academic

Used in medical and nursing textbooks, research papers, and case studies to describe a clinical finding.

Everyday

Virtually never used in everyday conversation. A layperson would say 'breathing very fast' or 'shortness of breath'.

Technical

The primary context. Used in patient notes, clinical assessments, diagnostic criteria, and communication between healthcare professionals.

Examples

By Part of Speech

verb

British English

N/A (The word is a noun; the verb form 'to tachypnoeate' is not standard)

American English

N/A (The word is a noun; the verb form 'to tachypneate' is not standard)

adverb

British English

N/A (No standard adverbial form)

American English

N/A (No standard adverbial form)

adjective

British English

The tachypnoeic patient was given oxygen.
A tachypnoeic episode was recorded.

American English

The tachypneic infant was admitted to the NICU.
She was tachypneic and diaphoretic.

Examples

By CEFR Level

N/A (Word is far beyond A2 level.)

N/A (Word is far beyond B1 level.)

The doctor wrote that the child had a fever and tachypnoea.
Rapid breathing, or tachypnoea, can be a sign of infection.

Persistent tachypnoea in the postoperative period warranted a chest X-ray to rule out pulmonary embolism.
The patient's tachypnoea and metabolic acidosis pointed towards diabetic ketoacidosis as the underlying cause.

Learning

Memory Aids

Mnemonic

Think: 'TACHY' (like tachycardia = fast heart) + 'PNOEA' (relating to breathing, like apnoea = absence of breathing). So, 'fast breathing'.

Conceptual Metaphor

THE BODY IS A MACHINE: Rapid breathing is a 'warning light' or 'overheating' indicating a system malfunction.

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

Avoid direct calques like 'быстрое дыхание' in formal medical contexts; the standard Russian medical term is 'тахипноэ' (takhypnoe).
Do not confuse with 'одышка' (dyspnoea), which is the subjective feeling of breathlessness, not the objective rate.

Common Mistakes

Confusing 'tachypnoea' (rate) with 'dyspnoea' (sensation).
Misspelling: 'tachypnea' (US) vs 'tachypnoea' (UK).
Using it as a lay term instead of a precise clinical descriptor.

Practice

Quiz

Fill in the gap

A key clinical distinction is that is the patient's subjective experience of difficult or laboured breathing.

Multiple Choice

In which of the following contexts is the word 'tachypnoea' MOST appropriately used?

FAQ

Frequently Asked Questions

: In a resting adult, a respiratory rate greater than 20 breaths per minute is generally considered tachypnoea.
: No. Tachypnoea is specifically an increased *rate* of breathing. Hyperventilation is increased *minute ventilation* (tidal volume x rate), which can lead to low carbon dioxide levels (hypocapnia). Tachypnoea can occur without hyperventilation if breaths are shallow.
: It is highly unusual and would sound overly clinical. In everyday contexts, phrases like 'breathing very fast,' 'panting,' or 'short of breath' are more appropriate and understandable.
: Common causes include lung diseases (pneumonia, asthma, COPD), heart failure, fever, pain, anxiety, metabolic acidosis (e.g., from diabetes), and severe anaemia.