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2. Reference ranges for blood tests - Wikipedia

   en.wikipedia.org/wiki/Reference_ranges_for_blood...

   Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the ...

3. Alveolar–arterial gradient - Wikipedia

   en.wikipedia.org/wiki/Alveolar–arterial_gradient

   2 at sea level and on room air (0.21x(760-47) = 149.7 mmHg for the alveolar oxygen partial pressure, after accounting for the water vapor), the direct mathematical cause of a large value is that the blood has a low PaO 2, a low PaCO 2, or both.

4. Serum-ascites albumin gradient - Wikipedia

   en.wikipedia.org/wiki/Serum-ascites_albumin_gradient

   A high gradient (> 1.1 g/dL, >11 g/L) indicates the ascites is due to portal hypertension, either liver related or non-liver related, with approximately 97% accuracy. [2] This is due to increased hydrostatic pressure within the blood vessels of the hepatic portal system , which in turn forces water into the peritoneal cavity but leaves proteins ...

5. AST/ALT ratio - Wikipedia

   en.wikipedia.org/wiki/AST/ALT_ratio

   The AST/ALT ratio or De Ritis ratio is the ratio between the concentrations of two enzymes, aspartate transaminase (AST) and alanine transaminase, aka alanine aminotransferase (ALT), in the blood of a human or animal. It is used as one of several liver function tests, and measured with a blood test.

6. Total iron-binding capacity - Wikipedia

   en.wikipedia.org/wiki/Total_iron-binding_capacity

   Total iron-binding capacity (TIBC) or sometimes transferrin iron-binding capacity is a medical laboratory test that measures the blood's capacity to bind iron with transferrin. [1] Transferrin can bind two atoms of ferric iron (Fe 3+ ) with high affinity.

7. Urea-to-creatinine ratio - Wikipedia

   en.wikipedia.org/wiki/Urea-to-creatinine_ratio

   In medicine, the urea-to-creatinine ratio (UCR [1]), known in the United States as BUN-to-creatinine ratio, is the ratio of the blood levels of urea (mmol/L) and creatinine (Cr) (μmol/L). BUN only reflects the nitrogen content of urea (MW 28) and urea measurement reflects the whole of the molecule (MW 60), urea is just over twice BUN (60/28 ...

8. Ankle–brachial pressure index - Wikipedia

   en.wikipedia.org/wiki/Ankle–brachial_pressure...

   The ankle-brachial pressure index (ABPI) or ankle-brachial index (ABI) is the ratio of the blood pressure at the ankle to the blood pressure in the upper arm (brachium). Compared to the arm, lower blood pressure in the leg suggests blocked arteries due to peripheral artery disease (PAD).

9. Ventilation/perfusion ratio - Wikipedia

   en.wikipedia.org/wiki/Ventilation/perfusion_ratio

   The V/Q ratio can therefore be defined as the ratio of the amount of air reaching the alveoli per minute to the amount of blood reaching the alveoli per minute—a ratio of volumetric flow rates. These two variables, V and Q, constitute the main determinants of the blood oxygen (O 2 ) and carbon dioxide (CO 2 ) concentration.