Extraction ratio

(Redirected from Renal extraction ratio)
Jump to navigation Jump to search

WikiDoc Resources for Extraction ratio

Articles

Most recent articles on Extraction ratio

Most cited articles on Extraction ratio

Review articles on Extraction ratio

Articles on Extraction ratio in N Eng J Med, Lancet, BMJ

Media

Powerpoint slides on Extraction ratio

Images of Extraction ratio

Photos of Extraction ratio

Podcasts & MP3s on Extraction ratio

Videos on Extraction ratio

Evidence Based Medicine

Cochrane Collaboration on Extraction ratio

Bandolier on Extraction ratio

TRIP on Extraction ratio

Clinical Trials

Ongoing Trials on Extraction ratio at Clinical Trials.gov

Trial results on Extraction ratio

Clinical Trials on Extraction ratio at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Extraction ratio

NICE Guidance on Extraction ratio

NHS PRODIGY Guidance

FDA on Extraction ratio

CDC on Extraction ratio

Books

Books on Extraction ratio

News

Extraction ratio in the news

Be alerted to news on Extraction ratio

News trends on Extraction ratio

Commentary

Blogs on Extraction ratio

Definitions

Definitions of Extraction ratio

Patient Resources / Community

Patient resources on Extraction ratio

Discussion groups on Extraction ratio

Patient Handouts on Extraction ratio

Directions to Hospitals Treating Extraction ratio

Risk calculators and risk factors for Extraction ratio

Healthcare Provider Resources

Symptoms of Extraction ratio

Causes & Risk Factors for Extraction ratio

Diagnostic studies for Extraction ratio

Treatment of Extraction ratio

Continuing Medical Education (CME)

CME Programs on Extraction ratio

International

Extraction ratio en Espanol

Extraction ratio en Francais

Business

Extraction ratio in the Marketplace

Patents on Extraction ratio

Experimental / Informatics

List of terms related to Extraction ratio

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


Overview

Extraction ratio is a measure in renal physiology, primarily used to calculate renal plasma flow in order to evaluate renal function. It is the amount of compound entering the kidney that got excreted into the final urine. [1].

Measured in concentration in blood plasma, it may thus be expressed as:

<math>Extraction ratio = \frac{P_a - P_v}{P_a}</math>

, where Pa is the concentration in renal artery, and Pv is the concentration in the renal vein.

For instance, para aminohippuric acid (PAH) is almost completely excreted in the final urine, and thus almost none is found in the venous return (Pv ~0). Therefore, the extraction ration of PAH ~1. This is why PAH is used in PAH clearance to estimate renal plasma flow.

References

  1. Renal Mathematics Texas Tech University Health Sciences Center


Template:WikiDoc Sources