Nasal polyps are benign inflammatory masses, arising from the mucosa of the nose and paranasal sinuses. They are considered to be a subgroup of chronic rhinosinusitis, and clinical diagnosis is made on the basis of the presence of sinonasal symptoms for more than 3 months and the visualization of polyps in the nasal cavity.
cronica
Alimentación en la Enfermedad Renal Crónica
El conocimiento de la composición corporal y la distribución de los fluidos en los pacientes renales es de gran importancia en la evolución clínica desde el punto de vista nutricional y de adecuación de la dosis de diálisis.
Histologic Scoring Systems for Chronic Liver Disease
Grading and staging refers to a semiquantitative assessment of the necroinflammatory activity (grade) and degree of fibrosis (stage) in relation to chronic hepatitis.
Diagnostic Criteria for Chronic HBV Infection
Chronic HBV infection is a necroinflammatory disease of the liver caused by persistent infection with HBV, and can be categorized as hepatitis B e antigen (HBeAg) positive or negative. Inactive hepatitis B surface antigen (HBsAg) carriers have HBV infection of the liver without significant, ongoing necroinflammatory disease. HBV infection is resolved when there is no further virologic, biochemical, or histologic evidence of active viral infection or disease.
Diagnostic Criteria for Chronic Inflammatory Demyelinating Polyneuropathy (CIDP)
Classic chronic inflammatory demyelinating polyneuropathy (CIDP) is characterized by the occurrence of symmetrical weakness in both proximal and distal muscles that progressively increases for more than two months (setting this condition apart from the Guillain–Barré syndrome, which is self-limited). The condition is associated with impaired sensation, absent or diminished tendon reflexes, an elevated cerebrospinal fluid protein level, demyelinating nerve-conduction studies, and signs of demyelination in nerve-biopsy specimens. The course can be relapsing or chronic and progressive, the former being much more common in young adults.
Electrodiagnostic Criteria for Chronic Inflammatory Demyelinating Polyradiculoneuropathy (CIDP)
These criteria are applied by testing the median, ulnar (stimulated below the elbow), peroneal (stimulated below the fibular head), and tibial nerves on one side of the body. During testing, limb temperature should be no less than 33°C at the palm and no less than 30°C at the external malleolus.
Definition and Stages of Chronic Kidney Disease (CKD)
NKF Definition of Chronic Kidney Disease
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Kidney damage for three or more months, as defined by structural or functional abnormalities of the kidney, with or without decreased GFR, manifested by pathologic abnormalities or markers of kidney damage, including abnormalities in the composition of the blood or urine or abnormalities in imaging tests
- GFR < 60 mL per minute per 1.73 m2 for three months or more, with or without kidney damage
Diagnostic Criteria for Chronic Fatigue Syndrome (CFS)
Centers for Disease Control Diagnostic Criteria
Clinically evaluated, unexplained, persistent, or relapsing fatigue that is:
- Of new or definite onset
- Not a result of ongoing exertion
- Not alleviated by rest
- Results in a substantial reduction in previous levels of occupational, social, or personal activity
GOLD Staging System for Chronic Obstructive Lung Disease (COPD) Severity
The European Respiratory Society (ERS) diagnostic criteria for COPD include the following symptoms: coughing, sputum production and/or dyspnoea, as well as a history of exposure to risk factors for COPD. The diagnosis is confirmed by a post-bronchodilator FEV1/FVC < 0.7 in spirometry, as sign of the airflow limitation that is not fully reversible.
Criteria for Chronic Stable Refractory Angina
The criteria for chronic stable refractory angina were defined by Mannheimer and colleagues in 2002 as a chronic condition characterized by the presence of angina caused by coronary insufficiency in the presence of coronary artery disease which cannot be controlled by a combination of medical therapy, angioplasty and coronary bypass surgery. The presence of reversible myocardial ischemia should be clinically established to be the cause of the symptoms. Chronic is defined as a duration of more than 3 months.