REFERENCE · DIAGNOSTIC TECHNIQUE

Clinical Cough Assessment

Clinician-focused educational reference; assessment requires appropriate training, consent and an individual safety plan.

Purpose and Suitability
Anatomy and Physiology
Preparation and Safety
Performing the Assessment
Interpreting Findings
Explaining the Result
Evidence and Limitations
Media and Accessibility
Research and Sources

Purpose and Suitability

Describe persistent cough, throat clearing and their clinical context before choosing a diagnostic label. This page is for clinicians coordinating respiratory and speech-language assessment; it does not provide a home suppression test or a paediatric cough algorithm.

Differential assessment: Checking which conditions could explain the symptoms, including more than one condition at the same time.

The clinical outline below retains the original collection protocol. Its observations, investigations and treatment comparisons answer different questions; they are not a seven-item diagnostic score. [1]

Anatomy and Physiology

Cough protects the airway; its sensory and motor pathways can also become unusually responsive. The larynx participates in breathing, voice and airway protection.

Cough hypersensitivity: Troublesome coughing triggered by ordinarily low levels of stimulation.

This respiratory framework is not interchangeable with tic cough, somatic cough disorder or a neurological FND diagnosis. The BTS statement describes hypersensitivity across several conditions and no objective diagnostic tool for it. [2]

Preparation and Safety

Explain the purpose and agree a stop signal before observation. Offer written responses, pauses and a supporter chosen by the person if speaking itself is difficult. Review existing respiratory treatment and swallowing precautions before selecting any task.

Teaching safeguards: do not require repeated coughing, breath-holding, sips of water or irritant exposure to make symptoms visible. New severe breathing difficulty, blue/grey colour, chest pain, coughing blood or reduced consciousness requires urgent assessment. A previous functional diagnosis must not override that response. Record why a comparison was omitted rather than scoring an unsafe attempt as normal.

Performing the Assessment

Characterize onset, frequency, sound, known triggers, night-time pattern, voice change, breathing sensation, medication exposure and prior respiratory or laryngeal disease.
Observe quiet breathing, spontaneous speech and any naturally occurring cough or throat clearing. Do not begin by provoking the symptom.
Perform respiratory, voice and neurological examination appropriate to the complaint. Refer for ENT, respiratory, allergy or gastroenterology assessment when indicated.
Use laryngoscopy, pulmonary-function testing or a clinically indicated supervised challenge to answer a defined question. A public media demonstration is not a reason to perform a challenge.
Compare the symptom across ordinary tasks and therapeutic strategies selected by a trained clinician. Look for a reproducible positive pattern, not a single moment of suppression.
Consider asthma, infection, reflux, medication-related cough, tic disorders, inducible laryngeal obstruction, structural laryngeal disease and other relevant alternatives or comorbidities.
Explain the formulation and provide a symptom-management and follow-up plan. Avoid implying that the person should simply suppress the cough.

The preserved outline is a consensus-informed educational sequence, not a validated score. [1]

Respiratory and other differential testing

For adults with chronic cough, BTS recommends chest radiography, full blood count, spirometry and exhaled nitric oxide where available. These assess respiratory causes; normal results are not positive FND evidence. Review medication exposure with the prescriber, particularly ACE inhibitors. Children need an age-appropriate pathway. [2]

Spirometry: A breathing test measuring airflow and volume. Exhaled nitric oxide: A breath marker that can inform assessment of airway inflammation.

Task and attention comparisons

Changes during conversation, breathing or another appropriate activity can characterize the cough. They may inform specialist assessment but lack standalone FND accuracy evidence. Avoid repetitive provocation, especially when discussion itself triggers symptoms. [1][3]

Document the task, the person’s experience, changes in effort or voice, and recovery. An observed response to a therapeutic cue should be recorded as that response, with the proposed interpretation stated separately.

Interpreting Findings

A useful finding: A reproducible clinical pattern can guide specialist formulation. Name the actual finding and its limits instead of writing only “functional features present.”

No change during the comparison: This supplies no evidence of task-related change in that sample. It does not decide whether symptoms occur elsewhere.

Uncertain assessment: Atypical sampling, intolerance or incomplete investigations leave questions open. State the next question and who will review it.

A quieter consultation does not establish reliable speech at work, safe exercise or low support needs. Ask what repeated activity costs and how long recovery takes; these are editorial follow-up prompts, not a validated disability scale. See the symptom overview.

Explaining the Result

Authored example, not a patient quotation:

“We have described the cough and what changed during today’s assessment. I will explain which diagnosis those findings support, what remains uncertain and what further checks are needed. Being able to alter a cough briefly does not mean you chose to have it.”

Give a written summary and a named route for follow-up. Separate the diagnostic explanation from any treatment trial.

Evidence and Limitations

Baker and colleagues provide a multidisciplinary consensus framework, not diagnostic-accuracy validation of this outline. BTS is adult chronic-cough guidance, not a validation study of functional cough. No sensitivity, specificity or cutoff is assigned to the task comparison. [1][2]

CHEST’s cautions about sound, sleep and psychological symptoms are discussed in the tic and somatic cough guide. A diagnostic label should not be inferred from improvement alone. [3]

Media and Accessibility

Prefer a process demonstration using a clinician and healthy volunteer:

The history domains shown as on-screen prompts.
Comfortable posture and quiet breathing observation.
A larynx diagram or de-identified laryngoscopy excerpt explaining what is being assessed.
One clinician-selected breathing or cough-management strategy, labelled as treatment rather than diagnosis.

Do not use strong odours, smoke, cold air, exercise or emotional provocation to create symptoms. If a spontaneous clinical episode is included, retain the context and obtain specific consent. Provide captions and a transcript that describe sounds without requiring the audience to hear them.

Research and Sources

Sources support the clinical framework and the separately identified respiratory investigations. Consent, documentation, accessibility and daily-impact prompts are editorial teaching safeguards, not an independently validated protocol.

Citation	Full citation
[1]	Baker J, Barnett C, Cavalli L, et al. Management of functional communication, swallowing, cough and related disorders: consensus recommendations for speech and language therapy. Journal of Neurology, Neurosurgery & Psychiatry. 2021;92(10):1112–1125. FND-CIT-0025. https://doi.org/10.1136/jnnp-2021-326767
[2]	Parker SM, Smith JA, Birring SS, et al. British Thoracic Society Clinical Statement on chronic cough in adults. Thorax. 2023;78(Suppl 6):s3–s19. DOI. FND-CIT-0254.
[3]	Vertigan AE, Murad MH, Pringsheim T, et al. Somatic Cough Syndrome (Previously Referred to as Psychogenic Cough) and Tic Cough (Previously Referred to as Habit Cough) in Adults and Children: CHEST Guideline and Expert Panel Report. Chest. 2015;148(1):24-31. DOI. PMID: 25856777. FND-CIT-0129.

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