Lisker's sign is a clinical sign in which there is tenderness when the front, middle (anteromedial) part of the tibia is percussed.
Louvel's sign is a clinical sign found in patients with deep vein thrombosis.
The 1846 introduction by surgeon John Hutchinson (1811–1861) of the spirometer, an apparatus for assessing the mechanical properties of the lungs via measurements of forced exhalation and forced inhalation.
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The 1851 invention by Hermann von Helmholtz (1821–1894) of the ophthalmoscope, which allowed physicians to examine the inside of the human eye.
Nikolsky's sign is a clinical dermatological sign, named after Pyotr Nikolsky (1858–1940), a Russian physician who trained and worked in Ukraine, which was part of the Russian Empire at that time.
Dieulafoy's triad: hyperesthesia of the skin, exquisite tenderness and guarding over McBurney's point, considered a classic sign of acute appendicitis
Pulsus paradoxus is a sign that is indicative of several conditions, including cardiac tamponade, pericarditis, chronic sleep apnea, croup, and obstructive lung disease (e.g. asthma, COPD).
Rose's sign is a clinical sign in which the skin of one leg feels warm and stiff when pinched.
Signs and symptoms vary based on the location and severity of the injury; they commonly include dyspnea (difficulty breathing), dysphonia (a condition where the voice can be hoarse, weak, or excessively breathy), coughing, and abnormal breath sounds.
The vertebral subluxation has been described as a syndrome with signs and symptoms which include: altered alignment; aberrant motion; palpable soft tissue changes; localized/referred pain; muscle contraction or imbalance; altered physiological function; reversible with adjustment/manipulation; focal tenderness.
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In 1890, Courvoisier published the book Casuistisch-statistische Beiträge zur Pathologie und Chirurgie der Gallenwege, a manual on biliary surgery in which he introduced the medical sign known as Courvoisier's law.