1The Bedside Approach to Tinnitus

FWhat the bedside can tell you before any machine

Tinnitus is a perception, not a measurement, so the clinician’s first instruments are the eyes, hands, ears and a few simple tools. A careful history and examination at the bedside frequently localise the problem to the external ear, the middle ear, the inner ear, the auditory nerve, the brain, or the structures around the ear—long before instrumented testing is arranged [2013].

The value of this low-technology step is high. Reversible causes such as impacted cerumen or a middle-ear effusion can be found and treated in minutes, and the small minority of patients whose tinnitus signals serious disease can be flagged for urgent imaging. The bedside is therefore both a filter and a map: it filters out the dangerous and maps the rest onto a working diagnosis [2014].

FThe three goals of a tinnitus assessment

A useful way to keep the assessment disciplined is to hold three goals in mind at once. The first is to find treatable causes—wax, infection, otosclerosis, somatosensory contributors—because correcting these may abolish or soften the tinnitus. The second is to flag red flags: unilateral or pulsatile symptoms, asymmetric hearing loss and any neurological sign that points to retrocochlear or vascular disease [2014].

The third goal is to profile distress. Tinnitus loudness correlates poorly with suffering; the impact is shaped by attention, emotion and sleep, so a patient with a faint sound may be far more disabled than one with a loud one [2013]. Measuring the percept is therefore never enough—the clinician must also measure its burden on the person.

TThe structure of the encounter

A reproducible sequence prevents omissions. History comes first and frames everything that follows: laterality, character (tonal, hissing, pulsatile), time course, aggravating manoeuvres, drug exposure and the degree of distress. Examination then proceeds outward-to-inward and peripheral-to-central: general and otoscopic survey, tuning-fork tests, a focused neuro-otologic screen, and auscultation when the tinnitus is pulsatile [2014].

Bedside psychoacoustics—pitch and loudness matching, minimum masking level and residual inhibition—then characterise the percept itself, and a brief distress screen quantifies its effect. The chapters that follow take each of these steps in turn; this module supplies the scaffold onto which they hang.

CWhy the neurophysiological model shapes the exam

The dominant clinical framework, Jastreboff’s neurophysiological model, holds that the tinnitus signal is generated in the auditory pathway but that its salience and emotional charge are produced by interactions with the limbic and autonomic systems [1990]. This is why the bedside examination deliberately reaches beyond the ear to the neck, the jaw, the cardiovascular system and the patient’s mood.

The model also explains why two patients with identical audiograms can present so differently, and it gives the examination a therapeutic purpose: a comprehensive, visibly thorough assessment is itself reassuring, and it allows patients to be stratified for sound therapy, counselling and multidisciplinary referral [2013].

CBedside versus instrumented assessment

It is worth being explicit about the boundary between this chapter and the later investigations chapter. The bedside assessment is what the clinician can do with their senses and hand-held tools at the first contact; instrumented assessment—pure-tone audiometry, tympanometry, imaging and laboratory tests—follows and confirms [2013].

The two are complementary, not competing. Bedside findings generate hypotheses and set the priority and urgency of investigation; a negative bedside screen for red flags reassures, and a positive one converts a routine work-up into an urgent one. Mastery of the bedside therefore makes every downstream test more efficient.