Tympanometry: Nursing Guide
Tympanometry measures middle-ear pressure and tympanic membrane mobility — helping nurses recognize effusion, Eustachian tube dysfunction, and conductive patterns when paired with otoscopy and audiometry. Valid tracings need an airtight probe seal, a clear canal, and cooperation; nurses defer testing when pain or drainage is present and escalate systemic or neurologic red flags according to facility policy.
Contents
Quick Facts
Key Takeaway
Tympanometry shows how the middle ear moves under changing pressure — not how softly someone hears.
Procedure Safety Checklist
Pre-procedure safety checks — confirm each item before the patient leaves the ward or clinic.
Correct patient, order, and symptomatic ear(s)
Otoscopy before probe placement — cerumen, drainage, perforation
No active purulent otitis, severe otalgia, or recent ear surgery without clearance
Child can sit still; probe size appropriate for canal
Recent URI, barotrauma, or airplane travel history
Hearing aids removed; ventilation tubes noted if present
Audiometry order or prior thresholds available when conductive loss suspected
Interpreter or pediatric coaching plan when needed
Not usually required — coach stillness and explain the pressure change
What is Tympanometry?
Tympanometry is a non-invasive test of middle-ear function. A probe sealed in the ear canal introduces small air-pressure changes while a tone is presented; the device records how much sound energy reflects from the tympanic membrane. The tracing (tympanogram) shows peak middle-ear pressure, compliance (mobility), and ear canal volume — parameters used to infer effusion, Eustachian tube dysfunction, perforation, or canal blockage when interpreted with otoscopy and hearing assessment.
Overview
Nurses encounter tympanometry in primary care, school hearing programs, occupational clinics, and ENT audiology suites. State screening manuals and clinical guidance describe tympanometry as an assessment of middle-ear condition and functioning that can contribute to conductive hearing loss — but it is not a hearing test and does not identify hearing sensitivity by itself. Nurses prepare the canal, support seal quality, document symptoms, and route abnormal patterns for medical review.
Clinicians often label tympanogram shapes as Type A (peaked tracing suggesting normal middle-ear pressure and mobility in context), Type B (flat tracing — no clear peak), and Type C (peak shifted toward negative pressure suggesting Eustachian tube dysfunction). Ear canal volume helps distinguish a wax-blocked canal, perforated membrane, or patent ventilation tube from middle-ear effusion. Reference intervals for pressure and compliance vary by age and device — always use the reporting audiologist or institutional norms.
Perform otoscopy before every tympanogram. Defer when the ear is painful, draining, or cannot achieve an airtight seal. Communicate flat or highly negative-pressure tracings with symptom onset and otoscopic findings to the prescriber — and arrange audiometry when conductive loss or functional hearing change is suspected.
Probe Seal and Middle-Ear Validity Safety
Valid tympanometry requires otoscopy before probe placement, an airtight canal seal, and interpretation alongside symptoms — not as a stand-alone hearing test. Defer when pain or purulent discharge is present. Sudden unilateral hearing loss and neurologic signs require urgent pathways independent of tympanogram shape.
- Flat tracing accepted without confirming seal quality and cerumen status
- Sudden painless unilateral hearing loss attributed to effusion alone
- Mastoid swelling, toxic appearance, or facial weakness with ear symptoms
- Ventilation-tube or surgical decisions based on crying-child invalid tracing
Document: otoscopy, seal attempts, tracing type per ear, symptoms, prescriber communication, and pending audiometry.
What Tympanometry Can and Cannot Tell You
This test can help identify:
- Middle-ear pressure and tympanic membrane mobility patterns (Type A, B, C shapes)
- Suspected effusion or reduced mobility when otoscopy and seal are valid
- Eustachian tube dysfunction with negative pressure peaks
- Canal blockage, perforation clues, or patent tube via ear canal volume context
This test cannot:
- Measure hearing sensitivity or word recognition — audiometry is required
- Diagnose acute otitis media without clinical examination
- Replace otoscopy or differentiate all causes of flat tracings alone
- Rule out sudden sensorineural hearing loss when onset is rapid — history drives urgency
Pre-probe Checks Before Tympanometry
Verify
Clarify before proceeding when:
- Active painful discharge or uncertain perforation
- Cerumen occludes canal and cannot be safely cleared
- Repeated seal failure without calmer retry or adapted protocol
- Sudden unilateral hearing loss with unclear onset timing
- Flat tracing conflicts with normal otoscopy — repeat validity check
- Ventilation tube or recent ear surgery without documented interpretation plan
- Systemic red flags (mastoid swelling, facial weakness, toxic appearance)
Reading Tympanograms With Otoscopy and Audiometry
Integrate tracing shape with otoscopic appearance, ear canal volume, symptom timeline, and audiometry when available. One flat curve does not equal permanent hearing loss — trends after treatment matter.
| Pattern | May suggest | Nursing focus |
|---|---|---|
| Type A (peaked) | Normal middle-ear pressure/mobility in context | Document; teach return precautions if symptoms persist |
| Type B (flat) | Effusion, marked stiffness, or invalid seal/wax | Verify seal; notify prescriber; arrange audiometry per orders |
| Type C (negative peak) | Eustachian tube dysfunction | Follow-up, autoinflation teaching per prescriber |
| High ear canal volume | Perforation or patent ventilation tube | Specialist interpretation — do not treat as simple effusion |
Tympanometry in Clinic, School, and ENT Pathways
Diagnostic safety badge: Routine diagnostic test — standard identification, otoscopy-first checks, and result follow-up still apply; sudden hearing loss upgrades to urgent pathway.
Check-before-test protocol
- Identity + order + symptomatic ear
- Otoscopy and canal readiness
- Defer if pain or discharge
- Seal coaching and valid tracing
- Audiometry and prescriber communication
Critical teach-back questions
- “Can you tell me what this test checks — and what it does not measure about hearing?”
- “Which symptoms should you report right away — pain, drainage, fever, or sudden hearing change?”
- “Why might audiometry still be needed after tympanometry?”
Care coordination: primary prescriber, audiology, ENT, school health services, and speech-language referral when hearing affects communication.
Why Tympanometry is Ordered
Tympanometry is ordered when clinicians need objective middle-ear function data beyond subjective fullness or whisper tests.
| Clinical Indication | What the Test Answers | Nursing Rationale |
|---|---|---|
| Ear fullness or suspected conductive hearing change | Is the middle ear under pressure or immobile? | Pairs with ear fullness and hearing loss symptoms when otoscopy alone is inconclusive. |
| Recurrent or persistent otitis media with effusion | Is fluid likely present behind an intact drum? | Flat Type B tracings with appropriate ear canal volume may support middle ear infection or effusion pathways — always with clinical examination. |
| Eustachian tube dysfunction or barotrauma follow-up | Is negative middle-ear pressure present after URI or pressure change? | Type C patterns and symptoms after flying or diving may align with airplane ear or Eustachian tube dysfunction per clinical guidance. |
| Audiometry workup for conductive pattern | Does middle-ear status explain an air-bone gap? | Tympanometry complements pure-tone testing when conductive components need confirmation before ENT referral or ventilation-tube planning. |
Contraindications and Precautions
There is no absolute contraindication to standard tympanometry, but testing should be deferred when otoscopy shows purulent drainage, severe otalgia, uncertain perforation, or when the patient cannot maintain a seal. Queensland Health adult ear guidance advises not performing tympanometry when pain or discharge is present.
- Flat tracing accepted without otoscopy — cerumen or poor seal can mimic effusion.
- Conductive pattern with sudden unilateral hearing loss — do not attribute to effusion alone.
- Systemic illness with mastoid tenderness, high fever, or neurologic signs — needs medical review beyond outpatient tympanometry.
- Crying or movement — breaks seal; repeat when child is calm.
- Patent ventilation tube or perforation — elevated ear canal volume changes interpretation.
- Infants under about seven months — high canal compliance may limit reliability per screening references; use age-appropriate protocols.
- Sudden unilateral hearing loss with or without vertigo — escalate per sudden hearing-loss pathway; do not delay for routine middle-ear management alone.
- Facial weakness, severe headache, or toxic appearance with ear symptoms — urgent medical review.
- Purulent otitis with worsening pain, fever, or mastoid swelling — evaluate for complicated otitis per prescriber.
Patient Preparation
Preparation centers on otoscopy, canal readiness, patient coaching for seal quality, and documenting symptoms that affect interpretation.
Pre-test checksReview recent antibiotics or decongestants with the prescriber when repeat tympanometry is used to evaluate treatment response — document medicines without stopping prescribed therapy without orders.
Performance — nursing procedure guide
This page is a Tests & Diagnostics guide for Tympanometry. It emphasizes why the test is ordered, how to interpret results, when to escalate, and preparation factors that affect validity — not step-by-step performance technique (those live under Nursing Procedures when available).
Step-by-step technique, supplies, infection prevention, and immediate post-procedure monitoring for this test are covered in:
Use the Patient preparation, Results and interpretation, and Nursing responsibilities sections on this page for order verification, pre-analytic checks, result follow-up, critical-value escalation, and documentation.
Result follow-up at a glance
Nursing workflow on this page — from order to safe action on results:
Results and Interpretation
Tympanometry reports peak middle-ear pressure (often in decapascals, daPa), compliance (mobility, often in milliliters), ear canal volume, and tympanogram shape (Type A, B, C, or device-specific labels). Minnesota Department of Health screening guidance cites example norms such as middle-ear pressure +50 to −200 daPa for school-age children and adults and compliance ranges that differ by age — institutional and instrument norms apply. Reference ranges and critical values may vary by laboratory, institution, analyzer, age, sex, pregnancy status, and clinical context. Always interpret results using the reporting laboratory’s reference range and local escalation policy.
Reference ranges, critical values, and protocols may vary by laboratory, institution, patient population, and testing method. Always follow local policy and the reporting laboratory’s reference range.
| Result | Range / Finding | Clinical Meaning | Nursing Action |
|---|---|---|---|
| No acute critical finding / as expected for indication | Type A peaked tracing with age-appropriate pressure and compliance per local norms | Middle-ear pressure and mobility within expected range for age and device when seal and otoscopy are valid | Document tracing; continue symptom surveillance; reinforce follow-up if symptoms persist |
| Equivocal / indeterminate finding | Type C or shallow peak with mild negative pressure | May suggest early or resolving Eustachian tube dysfunction | Teach autoinflation or follow-up per prescriber; repeat after URI recovery |
| Abnormal finding — clinically significant | Type B flat tracing with normal ear canal volume | Suggests middle-ear effusion or markedly reduced mobility — pair with otoscopy and symptoms | Notify prescriber; arrange audiometry when ordered; support ENT follow-up per pathway |
| Not applicable | Very low compliance peak (Type As pattern) with stiff drum | May suggest tympanosclerosis or stiff middle-ear system — specialist interpretation needed | Communicate pattern with otoscopic findings; avoid assuming simple effusion |
Urgent Findings and Escalation
Tympanometry does not use laboratory critical values. Urgent nursing action depends on clinical red flags — sudden hearing loss, neurologic signs, or complicated otitis — not numeric peaks alone.
| Critical Finding | Threshold / Value | Immediate Action |
|---|---|---|
| Sudden unilateral hearing loss | Rapid onset with or without flat tympanogram | Escalate per sudden hearing-loss pathway; document onset time — do not attribute solely to effusion |
| Flat tracing with toxic appearance or mastoid signs | Fever, severe pain, swelling behind ear, or lethargy | Urgent medical review for complicated otitis or alternate diagnosis per prescriber |
| Invalid tracing driving treatment decisions | Poor seal, crying, or cerumen occlusion producing unreliable curve | Do not start or stop ventilation-tube plans on invalid data — repeat after canal clearance or calm testing |
Stop routine reassurance and escalate according to facility policy when sudden hearing loss, neurologic signs, mastoid tenderness, or rapidly worsening pain occur — even if tympanometry was already performed.
Factors Affecting Results
Tracing shape can be altered by canal conditions, seal quality, age, and middle-ear anatomy.
- Cerumen against probe mimicking flat tracing until canal is cleared
- Poor seal or probe leak producing irregular or flat curves
- Patent ventilation tube with high ear canal volume misread as middle-ear pathology
- Small effusion with near-normal compliance — tracing may not flatten
- Testing through partial wax leaving misleading peaked curve
- Recent autoinflation or valsalva temporarily normalizing pressure
- Active crying or jaw movement breaking airtight seal
- Incorrect probe size for pediatric canal
- Recent ear surgery or tympanostomy tube altering volumes
Tympanometry does not measure hearing sensitivity, does not diagnose acute otitis media without clinical examination, and does not replace otoscopy. Instrument-specific norms and pediatric age limits apply. Turnaround and screening rules vary by institution; follow local institutional policy as a stand-alone screening test for sensorineural hearing loss.
Nursing Responsibilities
Nursing care emphasizes otoscopy-first workflow, seal validity, symptom documentation, and coordinated follow-up with audiometry and ENT when patterns suggest conductive loss.
Before the TestDocumentation
Documentation links tracing shape to otoscopy and functional hearing concerns.
“Tympanometry completed 1415 right ear after otoscopy — canal clear, child cooperative, good seal obtained. Tracing Type B flat; ear canal volume within expected range; compliance reduced per audiologist read. Left ear Type A. Patient reports fullness × 5 days post-URI without fever today. Audiometry ordered same visit. Prescriber notified of flat right tracing with symptoms. Parent taught to report fever, severe pain, or sudden hearing change. Repeat tympanometry planned at 4-week follow-up per ENT pathway.”
- Indication, laterality, and symptom onset
- Otoscopy findings and cerumen management
- Seal quality, cooperation, and tracing type per ear
- Peak pressure, compliance, and ear canal volume when reported
- Prescriber communication and pending audiometry
- Teaching on return precautions and follow-up timing
Patient and Family Education
Use plain language; emphasize that the test checks middle-ear movement, not intelligence.
Tympanometry NCLEX practice questions
Practice NCLEX-style clinical judgment focused on Tympanometry safety and nursing judgment. Use the case tabs (orders, results, assessment, nursing notes), then answer eight Next Gen–style items (including an ordered workflow step) and evaluate outcomes with the answer key.
Select a tab to view orders, results, assessment, and nursing note details for this case.
- Order: Tympanometry — right ear after URI; audiometry if conductive pattern
- Indication: 4-year-old with right ear fullness and parental concern about hearing × 4 days post-URI
- Timing: Clinic same day; no fever today; amoxicillin started yesterday
- Related orders: Audiometry pending after tympanometry; ENT referral if flat tracing persists
- Result: Right ear Type B flat tracing; ear canal volume 0.8 mL; left ear Type A peaked tracing
- Trend / prior value: Otoscopy yesterday showed dull right tympanic membrane; prior clinic visit 6 months ago reportedly normal ears
- Pending tests: Audiometry after lunch; formal audiologist report
- Vital signs: T 37.0 °C, HR 98/min, RR 22/min, SpO₂ 99% on room air
- Symptoms: Right ear fullness, mild irritability; denies severe otalgia or drainage today
- Focused assessment: Right TM dull without bulging; canal clear; child pulls at right ear when tired
- Preparation notes: First attempt poor seal when child laughed; second attempt after coaching
- Collection events: Audiologist noted adequate seal on second tracing; parent asked if test shows hearing loss
- Teaching gaps / safety concerns: Flat tracing with ongoing fullness despite one day of antibiotics; audiometry not yet done
Answer key & rationale
Frequently Asked Questions
FAQ
Does tympanometry test hearing?
No. Tympanometry assesses middle-ear pressure and tympanic membrane mobility. It does not measure hearing sensitivity. Minnesota Department of Health tympanometry screening guidance states it is not a screening for hearing loss. Audiometry evaluates how softly sounds can be heard.
What does a flat Type B tympanogram suggest?
A flat tracing without a clear peak often indicates reduced middle-ear mobility — commonly effusion, but also canal blockage or perforation depending on ear canal volume and otoscopy. Interpretation requires clinical examination, not the curve alone.
When should tympanometry be deferred?
Defer when otoscopy shows purulent drainage, severe ear pain, or when an airtight seal cannot be maintained. Queensland Health adult ear guidance advises not performing tympanometry if pain or discharge is present.
What are normal middle-ear pressure values?
Values vary by age and tympanometer. Example screening references cite roughly +50 to −200 daPa for school-age children and adults, with different pediatric limits — always use your institution’s norms and the reporting device guidelines.
How does tympanometry fit with audiometry?
Tympanometry explains middle-ear mechanics; audiometry quantifies hearing thresholds. Together they help separate conductive from sensorineural patterns when both are performed under valid conditions.
Can cerumen affect tympanometry?
Yes. Wax occluding the canal can produce flat or invalid tracings. Otoscopy and cerumen management before testing improve validity per clinical screening manuals.
What should nurses document after tympanometry?
Document indication, otoscopy, seal quality, tracing type per ear, reported pressure/compliance when available, symptoms, prescriber notification, pending audiometry, and patient teaching on return precautions.
References
References
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Minnesota Department of Health. Tympanometry Screening Manual. State of Minnesota.https://www.health.state.mn.us/docs/people/childrenyouth/ctc/hearingscreen/tympmanual.pdf
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Queensland Health. Ears and hearing adult — Chronic Conditions Manual. Queensland Government.https://www.ccm.health.qld.gov.au/adult-health-checks/ears-and-hearing-adult
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University of Wisconsin–Madison Department of Pediatrics. Tympanometry. UW Health.https://www.pediatrics.wisc.edu/education/acute-otitis-media/tympanometry/
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National Health Service. Hearing tests. NHS.uk.https://www.nhs.uk/tests-and-treatments/hearing-tests/
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Audiology Australia / Australian National Association of Audiologists. Audiometry Nursing Clinical Practice Standards. ANAA.https://www.anaa.asn.au/downloads/ms_6116.pdf
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National Health Service. Otitis media. NHS.uk.https://www.nhs.uk/conditions/otitis-media/
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Centers for Disease Control and Prevention; National Institute for Occupational Safety and Health. Noise and Hearing Loss Prevention. CDC.https://www.cdc.gov/niosh/topics/noise/
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World Health Organization. Deafness and hearing loss. WHO Fact Sheet.https://www.who.int/news-room/fact-sheets/detail/deafness-and-hearing-loss
Editorial Standards & Medical Review
About the author: Sid A. Abdala Balal, RN, writes evidence-based nursing education focused on diagnostic safety, clinical interpretation, and bedside nursing judgment.
Medical review: This guide is reviewed by Dr. Adam Sayedi, MD, for clinical accuracy, diagnostic safety, and alignment with current standards for Tympanometry.
Policies: Medical Review Process · Editorial Policy · Correction Policy