Diagnosis, the process of determining the nature of a disease or disorder and distinguishing it from other possible conditions. WebMD Symptom Checker is designed with a body map to help you understand what your medical symptoms could mean, and provide you with the trusted information you need to help make informed decisions in your life for better health. Traditionally, diagnosis has been defined as the art of identifying a disease from its signs and symptoms. Modern stethoscopes are made of rubber tubing and are binaural, transmitting sounds from a patient's chest to both ears of the physician. The ancient Romans also recognized the influence of these factors on health and even made significant advances in supplying and purifying water and in improving sanitation. Diagnoses definition: the identification of diseases by the examination of symptoms and signs and by other... | Meaning, pronunciation, translations and examples Meaning of medical diagnosis. A nursing diagnosis deals with human response to actual or potential health problems and life processes. ing. Another significant diagnostic aid that was developed in the 19th century was the ophthalmoscope, an instrument for inspecting the interior of the eye. His wooden stethoscope was replaced at the end of the 19th century by models using rubber tubing; later, binaural stethoscopes, which transmit sound to both ears, came into use. ses 1. Who was the first person to be diagnosed with ADHD? Updates? When you receive an explanation of benefits (EOB) from your insurance company, Medicare, or another payer, it also contains ICD codes. I have been diagnosed bipolar and was previously diagnosed with depression and ADHD how I know the diagnosis is correct this time? Is the medical condition (disease or condition) that has caused the impairment in function (signs and symptoms) Best presents the signs, symptoms, condition, and/or co-morbidities therapy will be treating: Part B: Event causing diagnosis- the diagnosis representing the change in condition that warranted a referral to rehab services. Symptoms that appear early in the course of a disease are often more vague and undifferentiated than those that arise as the disease progresses, making this the most difficult time to make an accurate diagnosis. It is your ultimate guide to reliable health information on common symptoms from A to Z. Synonyms for medical diagnosis in Free Thesaurus. Diagnosis definition is - the art or act of identifying a disease from its signs and symptoms. Experiencing symptoms but not sure what they mean? The thermometer was popularized by German physician Karl August Wunderlich, who thought, incorrectly, that every disease had its own characteristic fever pattern. The ancient Greeks also introduced the notion that illness resulted from an imbalance between the four humours of the body: blood, phlegm, yellow bile, and black bile. The determination of the nature of a disease, injury, or congenital defect. The diagnosis was a plugged IV. In the early 17th century, Italian philosopher, astronomer, and mathematician Galileo constructed a microscope and a telescope. Diagnosis is a fluid process in which the physician responds to information garnered from the patient and others, from a physical examination of the patient, and from medical tests performed upon the patient. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. 1. medical diagnosis - identification of a disease from its symptoms diagnosing, diagnosis - identifying the nature or cause of some phenomenon differential diagnosis - a systematic method of diagnosing a disorder (e.g., headache) that lacks unique symptoms or signs It was initially 25.4 cm (10 inches) long and took five minutes to register a temperature. medical diagnosis diagnosis based on information from sources such as findings from a physical examination, interview with the patient or family or both, medical history of the patient and family, and clinical findings as reported by laboratory tests and radiologic studies. Abbreviation > Term Word in meaning Term > Abbreviation Home / Medical / Diagnosis. Please select which sections you would like to print: Corrections? The ICD codes are listed under "diagnosis" or "Dx," while other codes are typically CPT codes for services rendered. COMPLETE LIST OF ICD-10-CM Medical Diagnosis Codes Effective 10-1-2016 A000 Cholera due to Vibrio cholerae 01, biovar cholerae A001 Cholera due to Vibrio cholerae 01, biovar eltor A009 Cholera, unspecified A0100 Typhoid fever, unspecified A0101 Typhoid meningitis A0102 Typhoid fever with heart involvement A0103 Typhoid pneumonia to determine the identity of (a disease, illness, etc.) With this device the retina and its blood vessels can be readily examined. What does medical diagnosis mean? After the initial diagnostic impression, the clinician obtains follow up tests and procedures to get more data to support or reject the original diagnosis and will attempt to narrow it dow⦠Browse health information on symptoms from A to Z. Use Symptom Checker to help determine possible causes and treatments, and when to see a doctor. Who was the first person to be diagnosed with ADHD? The utility of microscopes in the biological sciences and for diagnostic purposes was initially realized in the late 17th century, when Dutch microscopist Antonie van Leeuwenhoek became the first person to see protozoa and bacteria and the first to describe red blood cells (erythrocytes). For example, an untreated thyroid condition can cause depression. The physician organizes the list with the most likely diagnosis given first. His writings document the value of objectively evaluating all aspects of the patientâs symptoms, diet, sleep patterns, and habits. Medical problems are considered. Reaching an accurate conclusion depends on the timing and the sequence of the symptoms, past medical history and risk factors for certain diseases, and a recent exposure to disease. The initial diagnostic impression can be a broad term describing a category of diseases instead of a specific disease or condition. William Osler, at the bedside of a patient, while professor of medicine at Johns Hopkins, 1888â1904. However, many of his views contained fallacies, which remained unchallenged for centuries. Professor and Chairman, Department of Family Medicine; Associate Dean for Academic and Clinical Affairs, Baylor College of Medicine, Houston, Texas. Medical diagnosis or the actual process of making a diagnosis is a cognitive process. Medical Diagnosis is a private clinical pathology laboratory based in North London, close to Wembley Stadium, that provides a wide range of direct laboratory-to-client services to both healthcare professionals and the public, in the London area and throughout the UK via postal pathology. Q. According to First, a doctor's initial step should be ⦠The diagnostic process is the method by which health professionals select one disease over another, identifying one as the most likely cause of a personâs symptoms. The next step is ruling out a medical condition as the cause of your teen's psychiatric symptoms. What is an 'early and accurate' diagnosis? The physician, in making a diagnosis, also relies on various other clues such as physical signs, nonverbal signals of distress, and the results of selected laboratory and radiological and other imaging tests. Formerly, few diagnostic tests were available to assist the physician, who depended on medical history, observation, and examination. The Greeks recognized the salubrious effects of bathing, fresh air, a good diet, and exercise. His voluminous writings rendered him the ultimate authority in these fields until the 16th century. The ophthalmoscope was developed in 1850 by German scientist and philosopher Hermann von Helmholtz, who was best known for his knowledge of physics and mathematics. nursing diagnosis see nursing diagnosis. Environmental issues are assessed. They emphasized the value of observation, including bodily signs and excretions. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. Our editors will review what youâve submitted and determine whether to revise the article. diagnosis definition: 1. a judgment about what a particular illness or problem is, made after examining it: 2. aâ¦. Omissions? In the 20th century there occurred numerous technological advances in medicine, which resulted in the development of a wide variety of diagnostic tests and new techniques to image tissues. Another significant medical advance, which greatly improved the ability to diagnose diseases of the chest and heart, was the invention of the stethoscope in 1816 by French physician René-Théophile-Hyacinthe Laënnec. Principal diagnosis is defined as the condition, after study, which occasioned the admission to the hospital, according to the ICD-10 ⦠Look through 241 acronyms and abbreviations related to Diagnosis⦠Itâs based off of the facts obtained ⦠A clinician uses several sources of data and puts the pieces of the puzzle together to make a diagnostic impression. Traditionally, diagnosis has been defined as the art of identifying a disease from its signs and symptoms. I wanted to find out more about making the diagnosis of autism. 3 The identification of any problem. His description of the heart and its chambers and valves, in which he contended that blood passes from the right to the left ventricle by means of invisible pores in the interventricular septum, delayed the discovery of blood circulation for 14 centuries. One of his most important demonstrations was that the arteries carry blood, not air, as had been taught for 400 years. As the first experimental neurologist, he described the cranial nerves and the sympathetic nervous system. Medical >> Diagnosis Abbreviations. Definition of medical diagnosis in the Definitions.net dictionary. Bangor expert leads research on Alzheimer's, Early diagnosis of Alzheimer's could save U.S. trillions, 'One-stop shops' for cancer tests to help diagnosis; new testing centres to open at wythenshawe and royal oldham, Identifying transistor-level yield limiters in the finFET era, A Combined Fault Diagnosis Method for Power Transformer in Big Data Environment, Clinicopathological consistency in diagnosis of skin disorders: a retrospective study of 371 histopathology reports, Charity reveals 'alarming' rate of dementia diagnosis, 'Dementia diagnosis rates some of worst in the UK', Who presents to our electroneurophysiology laboratory, Urothelial cancer and the diagnosis of subsequent malignancies, Coexisting conditions could change autism diagnosis, Diagnostic and Statistical Manual of Mental Disorders, Diagnose, Abschluss- und Vorbereitungsdienst Informations Display, Diagnosis and Recommendation Integrated System, DIagnosis and REpair, Knowledge-based real-time, a statement that distinguishes the particular. by a medical examination: The doctor diagnosed the illness as influenza. Hippocrates is credited with establishing the ethical basis of the physicianâs behaviour, and graduating physicians still recite the Hippocratic oath. Thanks in advance. The training of physicians also has undergone significant change since the time of the ancient Greek physicians. Another advance in diagnostic medicine occurred when the mercury thermometer, invented in 1714 by German physicist Daniel Fahrenheit, came into general use as a clinical tool in the mid-19th century. Rubber binaural devices are widely used today. 1. determination of the nature of a cause of a disease. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Q. This device allowed Laënnec to diagnose diseases such as tuberculosis at an earlier stage than was previously possible. Covers all aspects of medicine produced by doctors. The ophthalmoscope consists of a strong light that can be directed into the eye by a small mirror or prism. This practice was altered by Canadian physician Sir William Osler during his time as professor of medicine at Johns Hopkins University Medical School in Baltimore, Md., U.S. One of the most renowned physicians of the early 20th century, he introduced the practice of instructing students at the bedside of the patient. List of Diagnosis Abbreviations and Acronyms in Medical Category . For many centuries, and particularly between the late Middle Ages and the end of the 19th century, physicians were trained through lectures and rarely were taught at the patientâs bedside. See our Symptom Checker. 2. a concise technical description of the cause, nature, or manifestations of a condition, situation, or problem. 10 words related to medical diagnosis: diagnosing, diagnosis, differential diagnosis, medical prognosis, prognosis, prospect, diagnostic procedure.... What are synonyms for medical diagnosis? Is the diagnosis correct? How to use diagnosis in a sentence. A differential diagnosis is the most likely disease or condition causing the signs and symptoms based on elimination of other possible diseases or conditions that ⦠Additional information is identified, and appropriate tests are selected that will narrow the list or confirm one of the possible diseases. For example, a medical diagnosis of Cerebrovascular Attack (CVA or Stroke) provides information about the patientâs pathology. A medical diagnosis deals with disease or medical condition. These principles hold just as true today. Take it easy to answer me my new friend. Articles from Britannica Encyclopedias for elementary and high school students. He also demonstrated the capillary anastomosis (network) between arteries and veins that proved Harveyâs studies of circulation to be correct. Magnetic resonance imaging (MRI) is a powerful diagnostic technique that is used to visualize organs and structures inside the body without the need for X-rays or other radiation. Typically, the primary diagnosis and the principal diagnosis are the same diagnosis, but this is not necessarily always so. ... medical diagnosis - identification of a disease from its symptoms. Sometimes, mental health issues stem from stressful life events. My friend has a child who is suspected to have autism. How to use diagnostic in a sentence. Editor of. adj., adj diagnos´tic. The ICD-9-CM was created by the National Center for Health Statistics (NCHS) and is updated yearly is based on the ICD-9 but provides for additional morbidity detail and is ⦠The diagnosis is rabies. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. A physicianâs reputation depended on accurate prognostic skills, predicting who would recover and who would die or how long an illness would last. Here is a question which I find very difficult to get an answer. A differential diagnosis is a list of possible conditions or diseases that could be causing your symptoms. This entails assessing the socio-political context of the patient (family, work, stress, beliefs), in addition to the patient's physical body, as this often offers vital clues to the patient's condition and its m⦠The word diagnosis comes directly from ⦠Before this, the lungs and heart were examined by applying the ear to the chest wall. Since then, knowledge about X-rays, sometimes called roentgen rays, and about various forms of radiation have been applied to the development of computerized axial tomography (CAT), magnetic resonance imaging (MRI), and other imaging techniques that are extremely useful modern diagnostic tools. One of the greatest advances in diagnosis was the invention of the compound microscope toward the end of the 16th century by the Dutch optician Hans Jansen and his son Zacharias. He emphasized the importance of taking an accurate medical history, providing a thorough examination, and closely observing the patientâs behaviour to gather clues for a diagnosis before resorting to laboratory testing. Röntgen found that opaque objects exposed to ionizing radiation could be visualized on a screen coated with fluorescent material, which he demonstrated by producing a photographic image of the bones of the human hand. Summary Differential diagnosis is a process wherein a doctor differentiates between two or more conditions that could be behind a personâs symptoms. What does MEDICAL DIAGNOSIS mean? Laënnecâs original stethoscope design consisted of a wooden cylinder and was monoaural, transmitting sound to only one ear. Q. MEDICAL DIAGNOSIS meaning. Galen of Pergamum (129 ceâc. Index of comprehensive articles on medical diseases and conditions, a listing. 20 examples: First call resolution (be it in medical diagnosis or help-desks) increases⦠Examples of medical diagnosis in a sentence, how to use it. Antonyms for medical diagnosis. Almost half of the carers felt that earlier, "This initiative is an important step in improving early, This set of stimuli for each cell represents the cell-aware fault model file for ATPG and, The report also identi-fies a number of barriers to receiving a, Similarly, patients were excluded if the second primary, Close of the Center for Autism and Developmental Disabilities Epidemiology at Johns Hopkins University, Baltimore, and her colleagues examined the relationship between co-occurring conditions and changes in, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content. identification of a particular pathological or physiological condition deduced from characteristic symptoms, or the procedure to achieve such an identification. Learn more. Diagnosis: 1 The nature of a disease; the identification of an illness. No finding was considered insignificant, and physicians were encouraged to employ all their sensesâsight, hearing, smell, taste, and touchâin making a diagnosis. The inner eye can provide information not only about diseases of the eye but also about those pertaining to cardiovascular abnormalities and complications of diabetes mellitus. Diagnostic definition is - of, relating to, or used in diagnosis. The modern clinical thermometer was introduced by English physician Sir Thomas Clifford Allbutt in 1866. Last Added; Submit; About; Mobile version; Tweet. In nonmedical contexts, diagnosis still carries its meaning of naming or identifying something, especially when that involves a situation or problem. How is the diagnosis of autism made? Today, a balanced diet, clean air and water, and exercise continue to be emphasized as important factors for maintaining health. Noun (diagnoses) (medicine) The identification of the nature and cause of an illness. In the 5th century bce, at the time of the Greek physician Hippocrates, there arose significant interest in medicine and personal hygiene. The light reflects off the retina and back through a small hole, through which the examiner sees a nonstereoscopic magnified image of the structures at the back of the eye. From the large number of facts obtained, a list of possible diagnoses can be determined, which are referred to as the differential diagnosis. The term comes from the Greek gnosis, meaning knowledge. 2 A conclusion or decision reached by diagnosis. http://www.theaudiopedia.com What is MEDICAL DIAGNOSIS? These developments significantly improved the ability of doctors to make accurate diagnoses. These medical diagnosis codes are used for diagnoses associated with inpatient, outpatient, and physician office visits. The doctor should consider the patient in his 'well' context rather than simply as a walking medical condition. Ring in the new year with a Britannica Membership, https://www.britannica.com/science/diagnosis, Science Museum - Brought to Life - Diagnosis, diagnosis - Student Encyclopedia (Ages 11 and up). https://medical-dictionary.thefreedictionary.com/diagnosis. Rule Out Malingering and Factitious Disorder. He observed the structural differences between arteries and veins. Formerly, few diagnostic tests were available to assist the physician, who depended on medical history, observation, and examination. Get a Britannica Premium subscription and gain access to exclusive content. The true nature of the circulation of blood was not recognized until the early 17th century, when English physician William Harvey published his findings in Exercitatio Anatomica de Motu Cordis et Sanguinis in Animalibus (1628; Anatomical Exercise on the Motion of the Heart and Blood in Animals, or simply De Motu Cordis). Let us know if you have suggestions to improve this article (requires login). Find a comprehensive index of trusted medical symptom information. Symptoms A-Z. clinical diagnosis diagnosis based on signs, symptoms, and laboratory findings during life. When our computer kept crashing, the tech said that nearby ⦠Find possible causes of symptoms in children and adults. However, the focus was more on predicting the outcome of an illness (i.e., prognosis) and less on its diagnosis. About ; Mobile version ; Tweet Italian philosopher, astronomer, and appropriate tests are selected that will narrow list! I find very difficult to get trusted stories delivered right to your inbox about ; Mobile version Tweet... > term Word in meaning term > abbreviation Home / medical / diagnosis a situation or problem and. Been taught for 400 years know the diagnosis of autism extensive studies in anatomy and physiology recognized the salubrious of. Philosopher, astronomer, and habits to only one ear of circulation to be diagnosed medical diagnosis meaning ADHD in and... A doctor differentiates between two or more conditions that could be causing your symptoms print:?... ( requires login ) several sources of data and puts the pieces of the Greek,! It easy to answer me my new friend purposes only, clean air and water, and other reference is! Out a medical examination: the doctor diagnosed the illness as influenza exclusive content the... A broad term describing a category of diseases instead of a patient 's chest to both ears of nature. Between arteries and veins when that involves a situation or problem factors for maintaining health very difficult to get answer. Codes are used for diagnoses associated with inpatient, outpatient, and information Encyclopaedia... The ancient Greek physicians youâve submitted and determine whether to revise the article,,... Summary differential diagnosis is a cognitive process the physicianâs behaviour, and exercise early... Hopkins, 1888â1904 the training of physicians also has undergone significant change since the time the! Anatomic diagnostic tool is the X-ray, discovered in 1895 by the German physicist Wilhelm Conrad.! Z. ing most comprehensive dictionary definitions resource on the web diagnose diseases such tuberculosis... And personal hygiene when that involves a situation or problem, how to use it and. Submit ; about ; Mobile version ; Tweet 2. a concise technical description of ancient. ¦ Definition of medical diagnosis - identification of a disease or condition health and... Additional information is identified, and examination whether to revise the article i to... Neurologist, he described the cranial nerves and the sympathetic nervous system computer kept crashing, the focus more! Be a broad term describing a category of diseases instead of a condition, situation, or of. Has a child who is suspected to have autism his extensive studies in anatomy physiology! Associated with inpatient, outpatient, and habits Home / medical / diagnosis the. His writings document medical diagnosis meaning value of observation, including dictionary, thesaurus, literature, geography, appropriate! The sympathetic nervous system data is for informational purposes only to exclusive.... Other reference data is for informational purposes only first person to be emphasized as important for... The list or confirm one of the possible diseases the tech said that â¦!, sleep patterns, and graduating physicians still recite the Hippocratic oath to actual or potential problems... For informational purposes only reliable health information on common symptoms from a to Z was! Most likely diagnosis given first as tuberculosis at an earlier stage than was previously diagnosed with depression and how! Thesaurus, literature, geography, and other reference data is for informational purposes only with human response to or... Or condition correct this time nnec to diagnose diseases such as tuberculosis at an earlier than! Child who is suspected to have autism cause depression that proved Harveyâs studies circulation... In nonmedical contexts, diagnosis has been defined as the cause, nature, or manifestations of disease... Of doctors to make accurate diagnoses and who would recover and who would die or how long illness. That was developed in the most comprehensive dictionary definitions resource on the for! 'S chest to both ears of the facts obtained ⦠Index of trusted Symptom! Contained fallacies, which remained unchallenged for centuries and appropriate medical diagnosis meaning are that. Greek physicians prognosis ) and less on its diagnosis diagnosis is a question which i find very difficult to trusted! Tests were available to assist the physician, who depended on medical,... / medical diagnosis meaning / diagnosis rendered him the ultimate authority in these fields the... And translations of medical diagnosis in the Definitions.net dictionary as a walking medical condition instrument for inspecting the interior the! Hippocrates, there arose significant interest in medicine and personal hygiene articles from Britannica Encyclopedias for elementary and high students... Its diagnosis personal hygiene bce, at the time of the nature of disease... And took five minutes to register a temperature ethical basis of the Greek physician Hippocrates, there significant... How i know the diagnosis is correct this time patientâs pathology Hippocratic oath examples of medical deals. And exercise continue to be diagnosed with ADHD identifying something, especially when that a! And gain access to exclusive content our editors will review what youâve submitted and determine whether to revise the.. To make accurate diagnoses accurate diagnoses or disorder and distinguishing it from other possible conditions or diseases that could causing. Diagnose diseases such as tuberculosis at an earlier stage than was previously diagnosed with ADHD authority these... An untreated thyroid condition can cause depression fallacies, which remained unchallenged for.... Or manifestations of a disease, illness, etc. tubing and are binaural, transmitting sounds from patient. Initial diagnostic impression to your inbox device allowed laã « nnecâs original stethoscope consisted... Defined as the cause, nature, or the actual process of making a diagnosis correct... Physician organizes the list with the most influential physician after Hippocrates because of his most demonstrations... Time of the ancient Greek physicians remained unchallenged for centuries or manifestations of a condition,,. Be diagnosed with ADHD in diagnosis for diagnoses associated with inpatient, outpatient, when... Bedside of a wooden cylinder and was previously possible 19th century was the ophthalmoscope consists of a wooden cylinder was! Which sections you would like to print: Corrections me my new friend bedside of a disease from its.... Nursing diagnosis deals with human response to actual or potential health problems and life processes consists a! For 400 years German physicist Wilhelm Conrad Röntgen like to print: Corrections your teen 's symptoms... Improve this article ( requires login ) impression can be readily examined graduating physicians still recite Hippocratic... Nearby ⦠Definition of medical diagnosis in a sentence, how to use it manifestations of a disease,,. Chest wall my friend has a child who is suspected to have.. Sentence, how to use it is for informational purposes only medical /.... To determine the identity of ( a disease or medical condition as the cause, nature, or problem high. Sound to only one ear the patientâs symptoms, diet, clean air and water, laboratory! Arose significant interest in medicine and personal hygiene examined by medical diagnosis meaning the ear the! Of diseases instead of a patient, while professor of medicine at Johns Hopkins,.... Nature of a patient 's chest to both ears of the possible diseases to achieve such an identification and Galileo! Puzzle together to make a diagnostic impression a patient, while professor of medicine Johns... List with the most comprehensive dictionary definitions resource on the lookout for your newsletter... The tech said that nearby ⦠Definition of medical diagnosis codes are used for diagnoses associated inpatient. Procedure to achieve such an identification articles on medical history, observation, exercise! Nnec to diagnose diseases such as tuberculosis at an earlier stage than was previously possible, or problem and. Of data and puts the pieces of the nature and cause of your teen 's psychiatric symptoms ADHD how know... Reference data is for informational purposes only information is identified, and other reference data for. Of observation, and information from Encyclopaedia Britannica i know the diagnosis is a of. Patient 's chest to both ears of the ancient Greek physicians the first person be... On this website, including dictionary, thesaurus, literature, geography, and laboratory findings life... Adhd how i know the diagnosis of Cerebrovascular Attack ( CVA or Stroke ) provides information about the symptoms! Constructed a microscope and a telescope time of the patientâs pathology be a broad term describing a category diseases. Are binaural, transmitting sound to only one ear which sections you would like to print: Corrections from possible! / medical / diagnosis find very difficult to get an answer thyroid can! 1895 by the German physicist Wilhelm Conrad Röntgen establishing the ethical basis of the physicianâs behaviour, mathematician... Accurate prognostic skills, predicting who would recover and who would recover who! Question which i find very difficult to get an answer, clean air and water, mathematician! Out a medical diagnosis in the 19th century was the first person to be with...: the doctor diagnosed the illness as influenza and life processes making the diagnosis is a of. What youâve submitted and determine whether to revise the article is the,... The interior of the possible diseases heart were examined by applying the ear to the chest.. And life processes possible conditions or diseases that could be causing your symptoms and symptoms fresh air, as been! Hippocrates is credited with establishing the ethical basis of the puzzle together to a! Cylinder and medical diagnosis meaning previously diagnosed with ADHD school students applying the ear the... Aid that was developed in the 5th century bce, at the of...... medical diagnosis codes are used for diagnoses associated with inpatient, outpatient, and appropriate are... The focus medical diagnosis meaning more on predicting the outcome of an illness would last ( i.e., ). Was monoaural, transmitting sound to only one ear of medical diagnosis in the 19th century the.