| ARCHETYPE ID | openEHR-EHR-OBSERVATION.tympanogram_226hz.v0 |
|---|---|
| Concept | Tympanogram test result - 226Hz |
| Description | Record of measurements of movement at the tympanic membrane in response to a 226Hz probe tone and changes in air pressure in the ear canal, and their clinical interpretation as an indication of middle ear function. |
| Use | Use to record measurements taken during tympanometry with a 226 Hz probe tone. Use to record outcome of tympanometry screening based on 226 Hz probe tone tympanometry. Use to record the interpretation all tympanogram measurements taken with a 226 Hz probe tone, to infer middle ear function for each ear, plus an overall interpretation (or tympanometric diagnosis). All of the data elements are recorded using a single method or protocol. If, during the test, any of the protocol parameters need to be modified, then the subsequent part of the test will need to be recorded within a separate instance of the test data, using the updated protocol parameters. Each 'Pressure vs Compliance Measurement' pair will comprise one pressure measurment with one corresponding compliance measurement. Compliance measurement has been represented in the archetype twice, each with different units. Compliance measurements will only be recorded in data using the unit that is recorded by the tympanometer in use - either volume units OR conductance units, but not both. Similarly, Static Compliance has been represented in the archetype twice, each with different units. Static Compliance measurements will only be recorded in data using the unit that is recorded by the tympanometer in use - either volume units OR conductance units, but not both. If the tympanogram subtypes are to be used in an implementation, these should be substituted for the global Type B category in the 'Tympanogram Type' data element. Both 'Type B' and 'Type B - low/high compliance' should not be used in the same implementation. 'Type B - low complicance' is equivalent to the unqualified 'Type B' in the 'Tympanogram Type' data element. Similarly, if Type C subtypes describing the Tympanogram curve are to be used in an implementation, these should be substituted for the global Type C category in the 'Tympanogram Type' data element. Both Type C and Types C1-3 should not be used in the same implementation. |
| Misuse | Not to be used to record other hearing tests. Use other archetypes as appropriate, for example OBSERVATION.audiogram. Not to be used to record high frequency tympanometry. Use the OBSERVATION.tympanogram_hf archetype instead. Not to be used to record multifrequency tympanometry. Use the OBSERVATION.tympanogram_hf archetype instead. |
| Purpose | To record measurements based on a 226 Hz probe tone, of the admittance or impedance of the middle ear system as a function of changing the external ear canal pressure. To infer middle ear function from objective measurements based on a fixed 226Hz probe tone, taken at the tympanic membrane of the mobility of the tympanic membrane, in reponse to varying air pressure in the ear canal. |
| References | Derived from: Tympanogram Result – 226Hz, Draft archetype [Internet]. Australian Digital Health Agency (NEHTA), ADHA Clinical Knowledge Manager. Authored: 2012 Nov 20. Available at: http://dcm.nehta.org.au/ckm#showArchetype_1013.1.1111_5 (discontinued).¶ Previously derived from: Tympanogram, Draft archetype [Internet]. openEHR Foundation, openEHR Clinical Knowledge Manager. Authored: 2012 Nov 20. Available at: http://www.openehr.org/knowledge/OKM.html#showarchetype_1013.1.73_2. American Academy of Audiology. (1997) Identification of hearing loss & middle-ear dysfunction in preschool & school-age children. Audiol Today. 9, 21–23. American National Standards Institute. (1987) Specifications for instruments to measure aural acoustic impedance and admittance (aural acoustic immittance). ANSI S3.39–1987. New York: American National Standards Institute. American Speech-Language-Hearing Association. (1997) Guidelines for audiologic screening. Rockville MD: American Speech-Language-Hearing Association. Fowler, C. G., & Shanks, J. E. (2002). Tympanometry. In J. Katz (Ed.), Handbook of clinical audiology (5th ed.). (pp. 175 – 204). Baltimore: Lippincott Williams & Wilkins. Margolis, R. H., & Hunter, L. L. (2000). Acoustic Immittance Measurements. In R. J. Roeser, M. Valente & H. Hosford-Dunn (Ed.), Audiology diagnosis. (pp. 381 - 423). New York: Thieme Medical Publishers, Inc. Margolis, R. H., Bass-Ringdahl, S., Hanks, W. D., Holte, K., & Zapala, D. A. (2003). Tympanometry in newborn infants—1 kHz norms. Journal of the American Academy of Audiology, 14, 383–392 Onusko, E. (2004). Tympanometry. American Family Physician, 70 (9), 1713 – 1720. |
| Copyright | © Northern Territory Department of Health (Australia), openEHR Foundation |
| Authors | Author name: Kerrie Lee Email: kerrie.lee2@bigpond.com Date originally authored: 2012-11-20 |
| Other Details Language | Author name: Kerrie Lee Email: kerrie.lee2@bigpond.com Date originally authored: 2012-11-20 |
| Other Details (Language Independent) |
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| Keywords | tympanogram, tympanometry, tympanometer, admittance, pressure, compliance, immittance, static |
| Lifecycle | in_development |
| UID | f7eaa3df-0411-4b98-8164-96a9f1f66174 |
| Language used | en |
| Citeable Identifier | 1246.145.2541 |
| Revision Number | 0.0.1-alpha |
| protocol | |
| Direction of pressure change | Direction of pressure change: The dirction of change of pressure administered via the ear canal.
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| Rate of pressure change | Rate of pressure change: The rate of change of pressure used in tympanometry. Property: null Units:
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| Admittance measurement | Admittance measurement: Method of acoustic admittance measurement used in the test.
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| Pressure range | Pressure range: The range of air pressure used to determine the tympanogram. |
| Start pressure | Start pressure: The pressure value in daPa at which the pressure sweep for tympanometry begins. It is a positive pressure if the direction of pressure change is descending and a negative pressure if the direction of pressure change is ascending. Property: Pressure Units:
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| Stop pressure | Stop pressure: The pressure value in daPa at which the pressure sweep for tympanometry ends. It is a negative pressure if the direction of pressure change is descending and a positive pressure if the direction of pressure change is ascending. Property: Pressure Units:
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| Tympanometer | Tympanometer: Details of tympanometer used to conduct the test. Include: openEHR-EHR-CLUSTER.device.v1 and specialisations |
| Pre-test calibration cavity size | Pre-test calibration cavity size: A cavity with a known volume used to check the calibration of the tympanometer. ANSI S3.39 requires that three calibration cavities (0.5, 2.0, and 5.0 cm3) be checked with each device. Property: Volume Units: 0.5..5.0 cc3 Limit decimal places: 2 Assumed value: 0.5cc3 Limit decimal places: 2 |
| Comment | Comment: Additional narrative about the protocol for the tympanogram not captured in other fields. |
| data | |
| Result details | Result details: The tympanogram test result measurements and interpretations, recorded per ear. |
| Test ear | Test ear: Identification of the ear being tested.
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| Measurement details | Measurement details: Measurements of the tympanogram to infer middle ear function. Static compliance has been represented in the archetype twice, each with different units. Static compliance will only be recorded in data using the unit that is captured by the tympanometer in use - either volume units OR conductance units, but not both. |
| Pressure vs compliance measurement | Pressure vs compliance measurement: The Pressure/Compliance measurement pair, captured from a tympanometer and used to define a continuous tympanogram curve. Each measurement pair will comprise one pressure measurment with one corresponding compliance measurement. Compliance has been represented in the archetype twice, each with different units. Compliance will only be recorded in data using the unit that is captured by the tympanometer in use - either volume units OR conductance units, but not both. Multiple instances of this measurement pair will form the basis for the graphical display of the tympanogram. |
| Pressure | Pressure: The pressure measured in the ear canal. Property: Pressure Units:
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| Compliance (volume) | Compliance (volume): The amount of acoustic energy absorbed by the middle ear system at a specified pressure, measured in cc3 or ml. If the tympanometer records compliance in cc3 or ml, use this data element. If the tympanometer records compliance in mmho, use the 'Compliance (Conductance) data element. Property: Volume Units:
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| Compliance (conductance) | Compliance (conductance): The amount of acoustic energy absorbed by the middle ear system at a specified pressure, measured in mmHo. If the tympanometer records compliance in mmho, use this data element. If the tympanometer records compliance in cc3 or ml, use the 'Compliance (Volume) data element. Property: Electrical conductance Units: 0.0..5.0 mmho Limit decimal places: 2 |
| Peak pressure | Peak pressure: Peak pressure (also called tympanometric peak pressure or middle ear pressure or MEP) is the ear canal pressure at which the peak of the tympanogram occurs. Also known as Middle Ear Pressure (MEP). It is plotted on the horizontal axis on a tympanogram. Property: Pressure Units:
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| Static compliance (volume) | Static compliance (volume): Static compliance (SC) is the greatest amount of acoustic energy absorbed by the middle ear system (the vertical peak of the tympanogram curve). Property: Volume Units:
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| Static compliance (conductance) | Static compliance (conductance): Static compliance (SC) is the greatest amount of acoustic energy absorbed by the middle ear system (the vertical peak of the tympanogram curve). Also known as 'Static Admittance'. It is plotted on the verical axis of a tympanogram. Property: Electrical conductance Units: 0.0..5.0 mmho Limit decimal places: 2 |
| Ear canal volume | Ear canal volume: An estimate of the volume of air between the probe tip and the tympanic membrane if the tympanic membrane is intact, or the volume of the ear canal and the middle ear space if the tympanic membrane is perforated. (Fowler & Shanks, 2002, p. 180). Property: Volume Units:
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| Tympanometric width | Tympanometric width: The pressure interval corresponding to a 50% reduction in the peak static admittance. This value is typically derived from the Tympanogram curve. In some immittance machines, for example the Grason Stadler GSI 39, this data element is known as 'gradient'. Property: Pressure Units: 0.0..400.0 daPa Limit decimal places: 0 |
| Tympanometric gradient | Tympanometric gradient: The steepness of the slope of the tympanogram near the peak. This value is typically derived from the Tympanogram curve. Choice of:
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| No test result | No test result: No test result is available for the test ear. Record as True if the clinician was unable to record a result for the test ear. Allowed values: {true} |
| Reason for no test result | Reason for no test result: Reason why no result is available for the test ear. Coding with a terminology is preferred, where possible. For example, patient was not co-operative; patient was not capable; ran out of time; no seal; presence of tympanic membrane perforation, impacted wax or discharge. |
| Tympanogram type | Tympanogram type: Description of the the shape of the tympanogram curve, based on the Jerger categories. If Type B or C subtypes are to be used in an implementation, these should be substituted for the global 'Type B' or 'Type C' classification here. Both 'Type B' and 'Type B - low compliance'/'Type B - high compliance' should not be used in the same implementation. Similarly, both 'Type C' and Types C1-3 should not be used in the same implementation.
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| Tympanogram type B subtype | Tympanogram type B subtype: Subclassification of the tympanograms with a flat curve. If the subtypes are to be used in an implementation, these should be substituted for the global Type B category in the 'Tympanogram Type' data element. Both 'Type B' and 'Type B - low/high compliance' should not be used in the same implementation. 'Type B - low complicance' is equivalent to the unqualified 'Type B' in the 'Tympanogram Type' data element.
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| Tympanogram type C subtype | Tympanogram type C subtype: Subclassification of the tympanograms with negative peak pressure. If the subtypes are to be used in an implementation, these should be substituted for the global Type C category in the 'Tympanogram Type' data element. Both Type C and Types C1-3 should not be used in the same implementation.
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| Clinical interpretation | Clinical interpretation: Clinical interpretation of all measurements for the test ear. Coding with a terminology is preferred, where possible. |
| Overall interpretation | Overall interpretation: Overall clinical interpretation of the measurements and related findings using an tympanometer. Coding with a terminology is preferred, where possible. This data element is effectively an tympanometric diagnosis. |
| Test result image | Test result image: Digital representation of the entire result. image/cgm, image/gif, image/png, image/tiff, image/jpeg |
| Comment | Comment: Additional narrative about the test results and intepretation not captured in other fields. |
| events | |
| Any event | Any event: Default, unspecified point in time or interval event which may be explicitly defined in a template or at run-time. |
| Baseline | Baseline: Measurement collection recorded as the basis for comparison with following measurement collections that may include other variables of time or patient state. |
| Post-Valsalva | Post-Valsalva: Measurements are recorded after the patient has performed a valsalva manoeuvre. |
| Post-Toynbee | Post-Toynbee: Measurements are recorded after the patient has performed a toynbee manoeuvre. |
| Other contributors | Amarjit Anand, NT Department of Health/NT Hearing, Australia Judith Boswell, Adelaide Hearing Consultants, Australia Stephen Chu, NEHTA, Australia Kimberley Crebbin, NT Hearing Services, Australia Kathy Currie, Northern Territory Health, Australia Jade Frederiksen, Hearing Health Program, DoH, Australia Sam Harkus, Australian Hearing, Australia Sam Heard, Ocean Informatics, Australia (Editor) Oliver Hosking, Remote Health NT, Australia Anthony Leech, Hearing Health, Australia Kerrie Lee, Ngaanyatjarra Health Service, Australia Heather Leslie, Atomica Informatics, Australia (Editor) Rebecca Matthews, NT Hearing Services - NTG, Australia Ian McNicoll, Ocean Informatics UK, United Kingdom Mark Ramjan, NT Department of Health, Australia Kelly Simmons, Department of Health, Australia Prasha Sooful, Royal Darwin Hospital, Australia |
| Translators |