山羊声
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出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2013/08/25 17:22:07」(JST)
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Egophony (British: Aegophony) is an increased resonance of voice sounds[1] heard when auscultating the lungs, often caused by lung consolidation and fibrosis. It is due to enhanced transmission of high-frequency noise across fluid, such as in abnormal lung tissue, with lower frequencies filtered out. It results in a high-pitched nasal or bleating quality in the affected person's voice.
Contents
- 1 Technique
- 2 Related techniques
- 3 Causes
- 4 Etymology
- 5 References
- 6 External links
Technique[edit source | edit]
While listening to the lungs with a stethoscope, the patient is asked to pronounce the modern English (more generally, post-Great Vowel Shift) long-E vowel sound. Stethoscopic auscultation of a clear lung field during this articulation will detect a sound matching that received through normal hearing; that is, the sound articulated by the patient will be clearly transmitted through the lung field and heard unchanged by the clinician. When the lung field is consolidated (filled with liquid or other solid mass such as tumor or fungus ball), the patient's spoken English long E will sound like a "pure-voweled" long E or a modern English long A without the latter's usual offglide. This effect occurs because the solid mass in the lung field will disproportionately dampen the articulated sound's acoustic overtones higher in the harmonic series, transmuting the English long E, in which higher overtones predominate strongly, to a sound (the English long A) in which higher overtones predominate only slightly, i.e., to a markedly lesser degree than in the former sound. This finding is referred to in clinical contexts as the "E to A transition." If associated with fever, shortness of breath, and cough, this E to A transition indicates pneumonia.
Somewhat related, bronchophony, a form of pectoriloquy, is a conventional respiratory examination whereby the clinician auscultates the chest while asking the patient to repeat the word "ninety-nine". In the UK, regional variation with clinicians from Edinburgh to Glasgow use the phrase "one-one-one" due to its more rounded sound.
Related techniques[edit source | edit]
Similar terms are bronchophony and whispered pectoriloquy. The mechanism is the same: fluid or consolidation causes the sound of the voice to be transmitted loudly to the periphery of the lungs where it is usually not heard.
Causes[edit source | edit]
- Above the level of pleural effusion
- Pneumonia (lung consolidation)
- Fibrosis
Etymology[edit source | edit]
Egophony comes from the Greek word for "goat," (αἴξ aix, aig-) in reference to the bleating quality of the sound.[2]
References[edit source | edit]
- ^ "egophony" at Dorland's Medical Dictionary
- ^ Sapira JD (1995). "About egophony". Chest 108 (3): 865–7. doi:10.1378/chest.108.3.865. PMID 7656646.
External links[edit source | edit]
- Abnormal Respiratory Vocal Sounds
Symptoms and signs: respiratory system (R04–R07, 786)
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Hemorrhage |
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Abnormalities
of breathing |
- Respiratory sounds
- Stridor
- Wheeze
- Crackles
- Rhonchi
- Hamman's sign
- Apnea
- Dyspnea
- Hyperventilation/Hypoventilation
- Hyperpnea/Tachypnea/Hypopnea/Bradypnea
- Orthopnea/Platypnea
- Trepopnea
- Biot's respiration
- Cheyne–Stokes respiration
- Kussmaul breathing
- Hiccup
- Mouth breathing/Snoring
- Breath holding
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Other |
- Asphyxia
- Cough
- Pleurisy
- Sputum
- Respiratory arrest
- Hypercapnia/Hypocapnia
- Pectoriloquy: Whispered pectoriloquy
- Egophony
- Bronchophony
- Silhouette sign
- Post-nasal drip
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Chest, general |
- Chest pain
- Precordial catch syndrome
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anat (n, x, l, c)/phys/devp
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noco (c, p)/cong/tumr, sysi/epon, injr
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proc, drug (R1/2/3/5/6/7)
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UpToDate Contents
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English Journal
- Outpatient diagnosis of acute chest pain in adults.
- McConaghy JR1, Oza RS.Author information 1The Ohio State University, Columbus, OH, USA. john.mcconaghy@osumc.eduAbstractApproximately 1 percent of primary care office visits are for chest pain, and 1.5 percent of these patients will have unstable angina or acute myocardial infarction. The initial goal in patients presenting with chest pain is to determine if the patient needs to be referred for further testing to rule in or out acute coronary syndrome and myocardial infarction. The physician should consider patient characteristics and risk factors to help determine initial risk. Twelve-lead electrocardiography is typically the test of choice when looking for ST segment changes, new-onset left bundle branch block, presence of Q waves, and new-onset T wave inversions. For persons in whom the suspicion for ischemia is lower, other diagnoses to consider include chest wall pain/costochondritis (localized pain reproducible by palpation), gastroesophageal reflux disease (burning retrosternal pain, acid regurgitation, and a sour or bitter taste in the mouth), and panic disorder/anxiety state. Other less common but important diagnostic considerations include pneumonia (fever, egophony, and dullness to percussion), heart failure, pulmonary embolism (consider using the Wells criteria), acute pericarditis, and acute thoracic aortic dissection (acute chest or back pain with a pulse differential in the upper extremities). Persons with a higher likelihood of acute coronary syndrome should be referred to the emergency department or hospital.
- American family physician.Am Fam Physician.2013 Feb 1;87(3):177-82.
- Approximately 1 percent of primary care office visits are for chest pain, and 1.5 percent of these patients will have unstable angina or acute myocardial infarction. The initial goal in patients presenting with chest pain is to determine if the patient needs to be referred for further testing to rul
- PMID 23418761
- Diagnosing the cause of chest pain.
- Cayley WE Jr.Author information Eau Claire Family Medicine Residency, Eau Claire, Wisconsin, USA. bcayley@yahoo.comAbstractChest pain presents a diagnostic challenge in outpatient family medicine. Noncardiac causes are common, but it is important not to overlook serious conditions such as an acute coronary syndrome, pulmonary embolism, or pneumonia. In addition to a thorough history and physical examination, most patients should have a chest radiograph and an electrocardiogram. Patients with chest pain that is predictably exertional, with electrocardiogram abnormalities, or with cardiac risk factors should be evaluated further with measurement of troponin levels and cardiac stress testing. Risk of pulmonary embolism can be determined with a simple prediction rule, and a D-dimer assay can help determine whether further evaluation with helical computed tomography or venous ultrasound is needed. Fever, egophony, and dullness to percussion suggest pneumonia, which can be confirmed with chest radiograph. Although some patients with chest pain have heart failure, this is unlikely in the absence of dyspnea; a brain natriuretic peptide level measurement can clarify the diagnosis. Pain reproducible by palpation is more likely to be musculoskeletal than ischemic. Chest pain also may be associated with panic disorder, for which patients can be screened with a two-item questionnaire. Clinical prediction rules can help clarify many of these diagnoses.
- American family physician.Am Fam Physician.2005 Nov 15;72(10):2012-21.
- Chest pain presents a diagnostic challenge in outpatient family medicine. Noncardiac causes are common, but it is important not to overlook serious conditions such as an acute coronary syndrome, pulmonary embolism, or pneumonia. In addition to a thorough history and physical examination, most patien
- PMID 16342831
- Sapira JD.Author information St. Louis University, Missouri, USA.Erratum inChest 1995 Dec;108(6):1776. AbstractEgophony is a change in timbre (Ee to A) but not pitch or volume. It is due to a decrease in the amplitude and an increase in the frequency [corrected] of the second formant, produced by solid (including compressed lung) interposed between the resonator and the stethoscope head. This explains certain difficulties in learning this valuable but currently neglected sign as well as in understanding certain physiologic false-positive occurrences.
- Chest.Chest.1995 Sep;108(3):865-7.
- Egophony is a change in timbre (Ee to A) but not pitch or volume. It is due to a decrease in the amplitude and an increase in the frequency [corrected] of the second formant, produced by solid (including compressed lung) interposed between the resonator and the stethoscope head. This explains certai
- PMID 7656646
Related Links
- Egophony (British: Aegophony) is an increased resonance of voice sounds heard when auscultating the lungs, often caused by lung consolidation and fibrosis. It is due to enhanced transmission of high-frequency noise across fluid, such as in ...
Related Pictures
★リンクテーブル★
[★]
- 英
- egophony, capriloquism, tragophony, tragophonia
- 同
- 山羊音、ヤギ声、ヤギ音、やぎ音、やぎ声
- 関
- 胸水、スコダ鼓音帯
[show details]
山羊声 : 約 893 件
山羊音 : 約 634 件
ヤギ声 : 約 7,270 件
ヤギ音 : 約 404 件
やぎ声 : 約 582 件
やぎ音 : 60 件
- Skoda鼓音帯の部位で「イー」と繰り返し発声させると、聴診上、山羊が啼いているように聴こえる
- 中等量(500mL)以上の胸水貯留時に聴取
参考