* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Diagnostic Audiology - Speech and Hearing Association of Alabama
Survey
Document related concepts
Transcript
Diagnostic Audiology: Best Practices James W. Hall III, Ph.D. Professor Salus University Adjunct Professor Nova Southeastern University Extraordinary Professor University of Pretoria South Africa [email protected] www.audiologyworld.net Diagnostic Audiology: Best Practices Historical perspective: Foundations of clinical audiology Our old and worn out audiologic test battery Defining “best practices” and “standard of care” The concept of value added tests (VATs) Clinical guidelines: Good news and bad news Summary of current clinical guidelines A modern audiological test battery Focusing on the ultimate goal of clinical care Psychoacoustics Laboratory (PAL) Harvard University (1940s and 1950s) SS Stevens (1906-1973) Audiology Grandfathers: Clinical Scholars Who Built the Foundation of Audiology Georg von Bekesy (1899 - 1972) Nobel Prize for Physiology or Medicine 1961 GSI E800 Bekesy Audiometer Audiology Grandfathers: Clinical Scholars Who Built the Foundation of Audiology PhD from University of Chicago under Nobel Prize Winner Robert Miliken Illustrious Career at Bell Telephone Laboratories Seminal Publications, e.g. Fletcher H (1929). Speech and Hearing. New York: D Van Nostrand Harvey Fletcher (1884-1981) Fletcher H & Steinberg JC (1929). Articulation testing methods. Bell System Technical Journal, 8, 806-854 Audiology Grandfathers: Clinical Scholars Who Built the Foundation of Audiology Hallowell Davis (1896 - 1992) Audiology Fathers: Clinical Scholars Who Built the Foundation of Audiology The Hearing Journal, 64 (7), 2011 Ira Hirsh (1922 - 2010) Audiology Fathers: Clinical Scholars Who Built the Foundation of Audiology The Hearing Journal, 64 (8), 2011 Robert Galambos, PhD, MD (1914 - 2010) Audiology Fathers: Clinical Scholars Who Built the Foundation of Audiology Demand for Hearing Services During and After WW II Diagnostic Audiology: Best Practices Historical perspective: Foundations of clinical audiology Our old and worn out audiologic test battery Defining “best practices” and “standard of care” The concept of value added tests (VATs) Clinical guidelines: Good news and bad news Summary of current clinical guidelines A modern audiological test battery Focusing on the ultimate goal of clinical care Audiology Test Battery: 65+ years Ago Test battery at the beginning of our profession, in order of test administration Air-conduction pure tone audiometry Bone-conduction pure tone audiometry Speech reception thresholds Word recognition (PB word lists) Uncomfortable loudness level (UCL), i.e., loudness discomfort level (LDL) Source: Wiener F & Miller G. Hearing aids. In Combat Instruments II. Washington, D.C. NDRC Report 117, 216-232, 1946 Raymond Carhart Clinical Scholars Who Built the Foundation of Audiology James Jerger, PhD Father of Diagnostic Audiology; Founder of American Academy of Audiology Susan Jerger Audiology Equipment in the 1950s and 1960s: Doesn’t it look a little dated? GSI 162 Speech Audiometer Early Maico Audiometer GSI E800 Bekesy Audiometer Diagnostic Audiology: Best Practices Modern Audiometers GSI AudioStar Audiometer KUDUwave Automated Audiometer Audiologic Test Battery: An Update is Long Overdue Procedure % Performing Procedure Pure tone audiometry: air conduction Pure tone audiometry: bone conduction Word recognition Speech reception threshold UCL (LDL) for speech Tympanometry UCL (LDL) for tones Acoustic reflexes Otoacoustic emissions (OAEs) Source: The Hearing Journal, December, 2002 100% 100% 95% 91% 83% 45% 45% 20% 4% Diagnostic Audiology: Best Practices Historical perspective: Foundations of clinical audiology Our old and worn out audiologic test battery Defining “best practices” and “standard of care” The concept of value added tests (VATs) Clinical guidelines: Good news and bad news Summary of current clinical guidelines A modern audiological test battery Focusing on the ultimate goal of clinical care Best Practice is Evidence-Based Practice (EBP) "Those who fall in love with practice without science are like a sailor who steers a ship without a rudder or compass, and who can never be certain whither he is going.” Leonardo Da Vinci (1452-1519) Best Practice is Evidence-Based Practice (EBP) Evidence-based practice is “the integration of best research evidence with clinical expertise and patient values” (Sackett et al, Evidence-Based Medicine: How to practice and teach EBM. London: Churchill, 2000, p. 1) EBP is a five step process Focused clinical question Evidence is sought to answer the question Clinician evaluates the quality of evidence Clinician must integrate the evidence with the patient’s clinical findings and preferred outcome to develop intervention plan Document outcome and identify ways to improve it Categories for Strength of Evidence used in Developing Clinical Guidelines Grade I: Evidence is strong and usually obtained from randomized controlled trials or well-designed clinical studies. Grade II: Evidence is from clinical studies that were based on retrospective data analysis, clinical trials that were not randomized and/or carefully-controlled, or from panel consensus based on existing guidelines and practice patterns. Grade III: Evidence is secondary in that it is based on current or long-standing practice without substantial supporting basic or clinical data. Evidence-Based Practice: Categories of Research Evidence (ASHA, 2004) 1a: Well-designed meta-analysis of randomized controlled trials 1b: Well-designed randomized controlled trials 2a: Well-designed controlled studies without randomization 2b: Well-designed quasi-experimental studies 3: Well-designed non-experimental studies, i.e., correlational and case studies 4: Expert committee reports, consensus conferences and clinical experience Evidence-Based Practice is Standard of Care: Definitions of Standard of Care Consistent with local, regional or national clinical practice Follows guidelines or recommendations on clinical practice approved by national multi-disciplinary professional committees or panels, e.g., Joint Committee on Infant Hearing Follows guidelines on clinical practice approved by national professional organizations, e.g., AAA or ASHA Is consistent with statements of Scope of Practice Code of Ethics Is in compliance with Federal guidelines for clinical practice and services, e.g., Joint Committee on Accreditation of Healthcare Organizations (JCAHO) Diagnostic Audiology: Best Practices Historical perspective: Foundations of clinical audiology Our old and worn out audiologic test battery Defining “best practices” and “standard of care” The concept of value added tests (VATs) Clinical guidelines: Good news and bad news Summary of current clinical guidelines A modern audiological test battery Focusing on the ultimate goal of clinical care The Concept of Value Added Tests (VATs): Rationale for Inclusion in a Test Battery Procedure adds value to the description of auditory status for the patient, including information that is: Not available from other procedures and/or Obtained quicker than with another procedure and/or Poses less risk than an alternative procedure and/or Costs less than a comparable procedure Findings are more reliable or valid than an alternative test Highly sensitive to auditory dysfunction Provides site-specific information on auditory dysfunction Contributes to more accurate diagnosis Useful in managing the patient and/or Information leads to better outcome for the patient The Concept of Value Added Tests (VATs): Old versus New Procedures Some old procedures almost always add value, e.g., Tympanometry Acoustic reflexes Some more recent procedures almost always add value, e.g., Otoacoustic emissions Some traditional test procedures do not invariably add value, e.g., Speech recognition threshold (SRT) Bone conduction pure tone audiometry Word recognition in quiet at 40 dB SL The Concept of Value Added Tests (VATs): A Critical Look at Three Traditional Procedures Speech Recognition Threshold (SRT) University of Florida student project (Emily Roscher) 2005 NAFDA convention poster paper Email survey of random sample of clinical audiologists 90% routinely perform SRT measurement 53% routinely calculate pure tone average Criteria for an acceptable PTA vs. SRT difference ranged from 5 to 12% N = 1000 subjects Age 2 to 92 years 570 males (57%) and 430 (43%) females Hearing loss 74% sensorineural 16% normal 6% mixed 3% conductive The Concept of Value Added Tests (VATs): A Critical Look at Three Traditional Procedures Speech Recognition Threshold (SRT) The Concept of Value Added Tests (VATs): A Critical Look at Three Traditional Procedures Speech Recognition Threshold (SRT) Significant differences between PTA vs. SRT (> +/- 5 dB) were related to selected factors Age Children (< 20 years) Older adults ( > 66 years) Hearing loss Greater PTA-SRT difference for SNHL Greater PTA-SRT difference for sloping hearing loss No significant difference between PTA and SRT for Gender The Concept of Value Added Tests (VATs): A Critical Look at Three Traditional Procedures Speech Recognition Threshold (SRT) Significant differences between PTA vs. SRT (> +/- 5 dB) were related to selected factors Age Children (< 20 years) Older adults ( > 66 years) Hearing loss Greater PTA-SRT difference for SNHL Greater PTA-SRT difference for sloping hearing loss No significant difference between PTA and SRT for Gender The Concept of Value Added Tests (VATs): A Critical Look at Three Traditional Procedures Speech Recognition Threshold (SRT) Margolis RH & Saly GL (2008). Distribution of hearing loss characteristics in a clinical population. Ear & Hearing, 29, 524-532 For 53% of 16,818 patients, age was between 20 to 70 years. The Concept of Value Added Tests (VATs): A Critical Look at Three Traditional Procedures Bone conduction pure tone audiometry An adult patient has no history of middle ear disease Findings available prior to pure tone audiometry Normal tympanograms bilaterally Acoustic reflex thresholds at expected normal levels Otoacoustic emission amplitudes within normal limits Air conduction pure tone audiometry shows sloping high frequency hearing loss Bone conduction pure tone audiometry will Waste valuable test time Not add value to the diagnosis Not add value to referral or management decisions Not lead to improved patient outcome The Concept of Value Added Tests (VATs): A Critical Look at Three Traditional Procedures Bone Conduction Pure Tone Audiometry Margolis RH & Saly GL (2008). Distribution of hearing loss characteristics in a clinical population. Ear & Hearing, 29, 524-532 The Concept of Value Added Tests (VATs): A Critical Look at Three Traditional Procedures Word Recognition in Quiet Patient is an adult with the chief complaint of difficulty hearing in noisy settings Patient converses easily in the clinic without visual cues Pure tone audiometry findings are entirely normal Word recognition in quiet wil Waste valuable test time Not add value to the diagnosis Not add value to management Not lead to improved patient outcome Instead Perform a test of speech perception in noise Consider other tests of auditory processing The Concept of Value Added Tests (VATs): Comparative Times for Different Tests “Remember that time is money” Benjamin Franklin Advice to a Young Tradesman 1748 Best Practices in Audiology: Efficient and Sensitive Assessment of the Peripheral Auditory System (Figure: Hall JW III (2014). Introduction to Audiology Today. Boston: Pearson) Best Practices in Audiology: Efficient and Sensitive Assessment of the Central Auditory Nervous System (Figure: Hall JW III (2014). Introduction to Audiology Today. Boston: Pearson) Copyright © Pearson 2014 The Cross-Check Principle in Pediatric Audiology (Jerger J & Hayes D. Arch Otolaryngol 102: 1976) Comparative Test Times for Selected Procedures: Both Ears with Masking as Indicated Time in Minutes 25 20 15 10 5 0 OAE Tymp ART PTA-AC PTA-BC SRT WR Audiologic Procedure Comparative Test Times for Selected Procedures: Both Ears with Masking as Indicated Audiologic Procedures in Two Basic Test Batteries PTA-AC PTA-BC SRT WR (25 word lists) 45 mins OAE Tymp PTA-AC WR (10 most difficult words 1st) 15 mins 45 mins 30 mins 15 mins 30 mins Best Practices in Audiology Today: Initial Steps in the Assessment History Reason for Assessment Immittance Measures Abnormal? Diagnostic DPOAEs Abnormal? Normal? Normal? AC + BC PT & speech audiometry Audiologic or Medical Management AC PT & speech audiometry* * SRT as indicated; WR 10 most difficult words Diagnostic Audiology: Best Practices Historical perspective: Foundations of clinical audiology Our old and worn out audiologic test battery Defining “best practices” and “standard of care” The concept of value added tests (VATs) Clinical guidelines: Good news and bad news Summary of current clinical guidelines A modern audiological test battery Focusing on the ultimate goal of clinical care Best Practices in Audiology: Practical Guidelines Today Excitement About Clinical Pathways in the 1990s “Clinical pathways are pre-conceived patient care algorithms, or paths, that are intended to reduce variability and cost, increase efficiency, and ultimately improve patient care. Whether or not such efforts prove to be effective in achieving such goals, many institutions are proceeding to develop such pathways. While many policies and procedures must of necessity be constructed locally, there is likely enough common ground across institutions such that sharing pathways may be of great benefit. In other words, why should each center be forced to "reinvent the wheel?" Best Practices in Audiology: Practical Guidelines Today Excitement About Clinical Pathways in the 1990s The good news … advantages of clinical guidelines The main benefit is to improve quality of patient care. Improve consistency in care, i.e., same procedures administered with patients presenting with the same clinical problem. Help patients to know what they should expect in healthcare, i.e., patients are empowered. With the power of the internet, patients may educate health care providers on what care should be provided. Clinical guidelines can influence public policy, and may influence reimbursement trends. Reassure health care providers who are uncertain about the appropriateness of their diagnostisor treatment for a patient. Reinforce evidenced-based clinical practice. May reduce inefficient, costly, and even dangerous practices. Best Practices in Audiology: Practical Guidelines Today Excitement About Clinical Pathways in the 1990s The bad news … disadvantages of clinical guidelines Legal considerations … professional liability if not followed closely Clinical guidelines can quickly become outdated. They must be updated or clinical practice is out of date. Conflicts between national “consensus” guidelines and community practice Are guidelines “politics disguised as science”? Guidelines can be time consuming and inefficient. Guidelines can oversimplify complex health care decisions. Flawed guidelines may be developed and used inappropriately to gain reimbursement for services, or to limit reimbursement for clinical services. Is there a danger in relying on expert versus clinical judgment? And …. Best Practices in Audiology: Practical Guidelines Today Excitement About Clinical Pathways in the 1990s More bad news … disadvantages of clinical guidelines Coverage may be dropped for services not delineated in guidelines. Professions engage in “turf wars” to control guidelines. Evidence is often lacking for guidelines. Inflexible guidelines do not permit the clinician to take into account all factors in the patient’s history and personal circumstances. Individualized patient care suffers. Guidelines are not a “magic bullet” for inferior health care. There is scant evidence that clinical guidelines actually do improve quality of patient care, and patient outcome Guidelines may be wrong for an individual patient. Diagnostic Audiology: Best Practices Historical perspective: Foundations of clinical audiology Our old and worn out audiologic test battery Defining “best practices” and “standard of care” The concept of value added tests (VATs) Clinical guidelines: Good news and bad news Summary of current clinical guidelines A modern audiologic test battery Focusing on the ultimate goal of clinical care Joint Committee on Clinical Practice (1999) Representation American Academy of Audiology (AAA) American Speech-Language-Hearing Association (ASHA) Department of Veterans Affairs (VA) Practice guidelines and statements (N = 5) Overview of audiologic services Comprehensive audiologic assessment (adult) Comprehensive audiologic assessment (pediatric) Hearing aid selection and fitting Cochlear implant assessment, programming, and audiologic rehabilitation (adult) Best Practices in Audiology Today: Joint Committee on Clinical Practice “The overall goal of the Joint Committee on audiology practice was to maximize the value of health care delivered to patients and clients. National consensus was sought on ideal practices, on maximizing quality through achieving desired outcomes, on customer satisfaction, and on efficient and appropriate use of procedures and resources.” Joint Audiology Committee: 11 Categories of Definitions in Practice Guidelines Personnel Referrals Procedures (CPT codes) Populations Clinical indicators Objectives Expected outcomes Clinical process Equipment and test environment Safety and health precautions References Joint Audiology Committee: Components of Audiologic Assessment History Appropriate physical examination (e.g., otoscopy) Cerumen management Air conduction pure tone thresholds (w/ appropriate masking Bone conduction pure tone thresholds (w/ appropriate masking) Speech thresholds (w/ appropriate masking) Speech recognition measures (w/ appropriate masking) Acoustic immittance Tympanometry Acoustic reflexes Acoustic reflex decay Otoacoustic emissions High frequency audiometry Stenger (pure tone and speech) Rehabilitation needs assessment Communication inventory Joint Audiology Committee: Further Diagnostic Assessment Options Based on Need Non-organic? Non-organic assessment VIIIth nerve/peripheral brainstem pathology? Electrophysiologic assessment CNS/APD disorder? APD assessment Balance disorder? Balance assessment Tinnitus problems? Tinnitus assessment Joint Audiology Committee Algorithm on Comprehensive Audiologic Assessment (Age 5 through Adult) Case History Medical Management? Yes? No? Referral or Consultation to Appropriate Medical Personnel? Otoscopy & P.E. Comprehensive Audiologic Assessment (A, B, I) Cerumen Mgt by Audiologist Audiologist Determines Need for Further Dx Assessment for (1, 2, 3, 4, or 5) American Academy of Audiology Clinical Guidelines Development Clinical Guidelines for Ototoxicity Assessment and Monitoring (2009) Task Force Members John Durrant (Chair) Kathleen Campbell Stephen Fausti O’Neil Guthrie Gary Jacobson Brenda Lonsbury-Martin Gayla Poling American Academy of Audiology Clinical Practice Guidelines for Ototoxicity Monitoring (2009) Assessment and Monitoring Techniques Pure tone audiometry Conventional test frequencies High frequency audiometry (HFA) Distortion product otoacoustic emissions (DPOAEs) Determine reliability during baseline measurement High frequency protocol with many frequencies/octave Frequency-specific electrophysiological measures as indicated ABR (tone burst and chirp stimuli) ASSR AAA Clinical Guidelines on Auditory Processing Disorders: A Manual for Evidence Based Assessment and Management (www.audiology.org) Clinical Guidelines: Auditory Neuropathy Spectrum Disorder (2010) In June 2008, at the invitation of Deborah Hayes, a panel of experts met in Comoハ, Italyハ at the NHS 2008 Conference to develop Guidelines for the Identification and Management of Infants and Young Children with Auditory Neuropathy. The panel consisted of: Yvonne Sininger, Ph.D. Arnold Starr, M.D. Christine Petit, M.D., Ph.D. Gary Rance, Ph.D. Barbara Cone, Ph.D. Kai Uus, M.D., Ph.D. Patricia Roush, Au.D. Jon Shallop, Ph.D. Charles Berlin, Ph.D. Identification and Diagnosis of Auditory Neuropathy Spectrum Disorder (ANSD): Minimal Test Battery (2010 ANSD Guidelines) Tests of cochlear hair cell function Otoacoustic emissions (OAEs) Cochlear microphonic (ECochG and ABR) CM may be present when OAEs are absent (e.g., with middle ear dysfunction) Tests of auditory nerve function ABR for high intensity click stimulation (e.g., 80 to 90 dB nHL) with separate averages for: Rarefaction stimulus polarity Condensation stimulus polarity Additional tests Acoustic reflex measurement Suppression of otoacoustic Other Procedures Important in the Diagnosis and Management of Auditory Neuropathy Spectrum Disorder (2010 Guidelines) Components of assessment Pediatric and developmental history Otologic evaluation, plus Imaging of cochlea with CT Imaging auditory nerve with MRI Medical genetics evaluation Ophthalmologic evaluation Neurological evaluation to assess: Peripheral nerve function Cranial nerve function Communication assessment Examples of Some of the Current American Audiology of Audiology Clinical Guidelines (There are Many More and More are Coming) 2007 Joint Committee on Infant Hearing (JCIH) Position Statement 2008 2010 American Academy of Audiology Clinical Practice Guidelines: Childhood Hearing Screening 2012 American Academy of Audiology: Audiologic Guidelines for the Assessment of Hearing in Infants and Young Children 2013 American Academy of Audiology Clinical Practice Guidelines: Pediatric Amplification 2014 American Academy of Audiology Tinnitus Retraining Therapy: Clinical Guidelines and Patient Counseling Guide American Academy of Audiology Clinical Practice Guidelines: Otoacoustic Emissions (in progress) Examples of Some of the ASHA Audiology Guidelines (www.asha.org) Guidelines for Audiologic Screening (1997) Guidelines for Audiology Service Delivery in Nursing Homes (1997) Guidelines for Fitting and Monitoring FM Systems (2002) Guidelines for Audiology Service Provision in and for Schools (2002) Clinical Practice Guidelines: Cerumen Impaction (2008) Clinical Practice Guidelines: Benign Paroxysmal Positional Vertigo (2008) Guidelines for Audiologists Providing Informational and Adjustment Counseling (2008) Diagnostic Audiology: Best Practices Historical perspective: Foundations of clinical audiology Our old and worn out audiologic test battery Defining “best practices” and “standard of care” The concept of value added tests (VATs) Clinical guidelines: Good news and bad news Summary of current clinical guidelines A modern audiological test battery Focusing on the ultimate goal of clinical care A Modern Diagnostic Audiologic Test Battery In the order of testing for new patients. Test time ~ 30 - 45 minutes. Objective measures Otoacoustic emissions (OAEs) DPOAEs 500 to 8000 Hz Normal versus present but abnormal versus absent Aural immittance measures Tympanometry Acoustic reflexes (crossed vs. uncrossed conditions ) Behavioral measures Pure tone audiometry (automated technique as appropriate) Inter-octave frequencies (e.g., 3000 and 6000 Hz) High frequency (> 8000 Hz) audiometry as indicated Bone conduction measurement only as indicated Speech audiometry SRT as indicated Word recognition (recorded material) 10 most difficult words first Screen auditory processing as indicated Diagnostic Audiology: Best Practices Historical perspective: Foundations of clinical audiology Our old and worn out audiologic test battery Defining “best practices” and “standard of care” The concept of value added tests (VATs) Clinical guidelines: Good news and bad news Summary of current clinical guidelines A modern audiological test battery Focusing on the ultimate goal of clinical care Evidence-Based Practice: Focusing on the Goal, Not the Process Identification • • • • Screening History Self-Referral Professional referral Evidence-Based Practice: Focusing on the Goal, Not the Process Diagnosis Identification • • • • Screening History Self-Referral Professional referral • • • • • Hearing loss ANSD APD Tinnitus Vestibular disorder Evidence-Based Practice: Focusing on the Goal, Not the Process Diagnosis Identification • • • • Screening History Self-Referral Professional referral • • • • • Hearing loss ANSD APD Tinnitus Vestibular disorder Intervention Hearing aids Aural Rehab Counseling Cochlear implant (s) • Vestibular rehab • Drugs • Surgery • • • • Evidence-Based Practice: Focusing on the Goal, Not the Process Diagnosis Identification • • • • Screening History Self-Referral Professional referral • • • • • Hearing loss ANSD APD Tinnitus Vestibular disorder Intervention Hearing aids Aural Rehab Counseling Cochlear implant (s) • Vestibular rehab • Drugs • Surgery • • • • Outcome Effective communication • Efficient communication • Academic success • Quality of life • Diagnostic Audiology: Best Practices A Glimpse into the Future of Audiology A Glimpse at the Future of Audiology: An Optimistic Perspective If money is your hope for independence, you will never have it. The only real security that a man will have in this world is a reserve of knowledge, experience, and ability. Henry Ford A Glimpse at the Future of Audiology: An Optimistic Perspective The biggest mistake we currently make may is an emphasis on selling hearing aids when the focus of our attention, when the focus should be … A Glimpse at the Future of Audiology: An Optimistic Perspective Should be not on products but …Providing comprehensive evidence-based audiology services to maximize communication and patient outcome! A Glimpse at the Future of Audiology: An Optimistic Perspective Education Reforms are Essential and a Top Priority Aggressively Market Audiologists as THE Hearing Experts Relation with Other Professional Organizations Open and constant communicate Tirelessly seek consensus on core issues “Speak with one voice” A Glimpse at the Future of Audiology: An Optimistic Perspective Broaden Hearing Health Care Profession Bring hearing aid dispensers into audiology fold Support expansion of audiology assistants and technicians Return to Original Audiology Missions Diagnosis of hearing loss and related disorders Rehabilitation of hearing loss with optimal outcome A Glimpse at the Future of Audiology: Increased Focus on Exclusive Audiology Services Evidence-Based Rehabilitation With or without hearing aids Auditory and cognitive rehabilitation in elderly population Enhanced listening skills Pediatric Services Hearing loss Vestibular and balance deficits Vestibular Assessment and Rehabilitation in Adults Auditory Processing Disorders Tinnitus and Hyperacusis A Glimpse at the Future of Audiology: Questions to Ask Our Patients “Do you want to buy a cheap hearing aid or with audiology services do you want to …. Communicate effectively Enjoy better quality of life Live happier and healthier Avoid falls and maintain mobility Improve your child’s school performance No longer hear annoying tinnitus Tolerate everyday loud sounds Diagnostic Audiology: Best Practices Thank You! … Questions? 2014 Boston: Pearson Publishers www.allynbaconmerrill.com