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Because of these multiple pathways, total loss of taste (ageusia) is rare. The patient should be asked about the use of tobacco or cocaine, because these substances can adversely affect the sense of smell. Age-related deficits in the ability to smell are well documented,13,14 and such deficits appear in the majority of elderly patients who are healthy and taking no medications.14 However, the complaint of smell loss should never be attributed just to age, and other causes should be sought. WebMany people live under the false assumption that they've got great taste. The human tongue is wrapped in taste buds (fungiform The patient's teeth and gums should also be examined, because severe dental caries, gingivitis and intraoral abscess can result in a malodorous and caustic oral environment that disturbs the senses of smell and taste. Because olfactory dysfunction is more common than taste dysfunction (Figure 1) and the three most common causes of loss of smell are nasal and sinus disease, upper respiratory infection and head trauma, it may be helpful to direct the history and physical examination toward these diagnoses. Angiotensin-converting enzyme inhibitors (notably captopril [Capoten]) are among the medications most commonly associated with taste disturbances, including decreased sense of taste (hypogeusia) and a strongly metallic, bitter or sweet taste.6 Excessive dryness of the oral cavity is a common side effect of a number of medications (e.g., anticholinergics, antidepressants, antihistamines) and disease states (e.g., Sjgren's syndrome, xerostomia, diabetes mellitus). The Major Disadvantages of Test Marketing - Chron Clinical laboratory tests may be helpful in ruling out coexisting medical conditions suggested by the history and physical examination, such as infection, nutritional deficiency, allergy, diabetes mellitus and thyroid, liver or kidney disease (Table 4). Taste tests are popular marketing research tools MRI is superior to CT scanning in the evaluation of soft tissues, but it poorly defines bony structures. The nasal turbinates are also important because they provide moderate resistance and a moist environment, thereby allowing optimal stimulation of olfactory neurons by airborne compounds.11,12. In particular, more detailed images are needed when endoscopic surgery is to be performed. Olfactory disturbance has many possible causes (Table 1).1,68,15,16 In most instances, loss of smell is caused by nasal and sinus disease, upper respiratory tract infection or head trauma. Studies such as positron emission tomography and single photon emission computed tomography do not play a significant diagnostic role outside of major academic institutions.
disadvantages of taste testing