Numerical knowledge
Clinical parameters
Browse physiological and laboratory parameters together with specimen, method, unit, population context and curated reference bands.
Ranges are source-, method-, specimen-, age-, sex- and population-specific. They are educational reference data, not a substitute for the reporting laboratory or clinical judgement.
Maximal Expiratory Flow Rate
AMW:PARAM:135004The airflow rate measured during the first liter expired after the first 200 ml have been exhausted during a FORCED VITAL CAPACITY determination. Common abbrev…
Maximal Expiratory Flow-Volume Curves
AMW:PARAM:135022Curves depicting MAXIMAL EXPIRATORY FLOW RATE, in liters/second, versus lung inflation, in liters or percentage of lung capacity, during a FORCED VITAL CAPACIT…
Maximal Midexpiratory Flow Rate
AMW:PARAM:135005Measurement of rate of airflow over the middle half of a FORCED VITAL CAPACITY determination (from the 25 percent level to the 75 percent level). Common abbrev…
Mean Arterial Pressure
AMW:PARAM:105001Mean arterial pressure is a hemodynamic blood pressure parameter used in shock, sepsis, organ perfusion and critical care scoring contexts.
Mean Platelet Volume
AMW:PARAM:115013A measure of the size of PLATELETS.
Metabolic Clearance Rate
AMW:PARAM:125010Volume of biological fluid completely cleared of drug metabolites as measured in unit time. Elimination occurs as a result of metabolic processes in the kidney…
Metabolic Equivalent
AMW:PARAM:125015A measurement of OXYGEN uptake in a sitting, resting person (resting oxygen consumption), varying with age, sex, race, and other factors. In normal adult men, …
Microvascular Density
AMW:PARAM:105016Measured density of MICROVESSELS in a given field of area. It is a surrogate BIOMARKER used for many physiological and pathophysiological processes such as ang…
Molecular Weight
AMW:PARAM:125021The sum of the weight of all the atoms in a molecule.
Mucociliary Clearance
AMW:PARAM:135020A non-specific host defense mechanism that removes MUCUS and other material from the LUNGS by ciliary and secretory activity of the tracheobronchial submucosal…
Muscle Strength
AMW:PARAM:160026The amount of force generated by MUSCLE CONTRACTION. Muscle strength can be measured during isometric, isotonic, or isokinetic contraction, either manually or …
Mutation Rate
AMW:PARAM:210001The number of mutations that occur in a specific sequence, GENE, or GENOME over a specified period of time such as years, CELL DIVISIONS, or generations.
Organ Size
AMW:PARAM:160018The measurement of an organ in volume, mass, or heaviness.
Osmolar Concentration
AMW:PARAM:125022The concentration of osmotically active particles in solution expressed in terms of osmoles of solute per liter of solution. Osmolality is expressed in terms o…
Osmotic Pressure
AMW:PARAM:190005The pressure required to prevent the passage of solvent through a semipermeable membrane that separates a pure solvent from a solution of the solvent and solut…
Oxygen Saturation
AMW:PARAM:125012Extent to which HEMOGLOBIN is saturated with OXYGEN typically as measured in arterial blood. It can be measured by various methods (e.g., PULSE OXYMETER, blood…
Pain Threshold
AMW:PARAM:160004Amount of stimulation required before the sensation of pain is experienced.
PaO2/FiO2 Ratio
AMW:PARAM:135001PaO2/FiO2 ratio is an oxygenation parameter used in respiratory failure and organ dysfunction scoring.
Partial Pressure
AMW:PARAM:190006The pressure that would be exerted by one component of a mixture of gases if it were present alone in a container. (From McGraw-Hill Dictionary of Scientific a…
Particle Size
AMW:PARAM:190015Relating to the size of solids.
Paternal Age
AMW:PARAM:210008Age of the biological father.
Peak Expiratory Flow Rate
AMW:PARAM:135006Measurement of the maximum rate of airflow attained during a FORCED VITAL CAPACITY determination. Common abbreviations are PEFR and PFR.
Physical Appearance, Body
AMW:PARAM:160022Externally visible physical characteristics of a body.
Plasma Volume
AMW:PARAM:105005Volume of PLASMA in the circulation. It is usually measured by INDICATOR DILUTION TECHNIQUES.
Portal Pressure
AMW:PARAM:105011The venous pressure measured in the PORTAL VEIN.
Pregnancy Outcome
AMW:PARAM:140004Results of conception and ensuing pregnancy, including LIVE BIRTH; STILLBIRTH; or SPONTANEOUS ABORTION. The outcome may follow natural or artificial inseminati…
Pregnancy Rate
AMW:PARAM:140001The ratio of the number of conceptions (CONCEPTION) including LIVE BIRTH; STILLBIRTH; and fetal losses, to the mean number of females of reproductive age in a …
Pressure
AMW:PARAM:190003A type of stress exerted uniformly in all directions. Its measure is the force exerted per unit area. (McGraw-Hill Dictionary of Scientific and Technical Terms…
Pulmonary Diffusing Capacity
AMW:PARAM:135003The amount of a gas taken up, by the pulmonary capillary blood from the alveolar gas, per minute per unit of average pressure of the gradient of the gas across…
Pulmonary Wedge Pressure
AMW:PARAM:135002The blood pressure as recorded after wedging a CATHETER in a small PULMONARY ARTERY; believed to reflect the PRESSURE in the pulmonary CAPILLARIES.