Count to 10 - Anaesthetic Primary Podcast EP44 – Renal Anatomy, Blood Flow & Measurement | Anaesthetic Primary Topic | Renal Physiology | CT10
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Oct 29, 2025 Dive into renal physiology with an engaging exploration of kidney anatomy and blood flow! Discover the intricacies of nephron structure, including renal corpuscle components and the functionality of various tubular segments. Learn about the fascinating juxtaglomerular apparatus and how renal blood flow (RBF) ties into glomerular filtration rate (GFR). Arnie also breaks down GFR measurement techniques and common pitfalls. Perfect for those keen to polish their understanding of renal concepts!
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Adjust MAP Targets For Chronic Hypertension
- Recognize that chronic hypertension shifts renal autoregulation to higher MAPs.
- Consider targeting a slightly higher MAP in chronically hypertensive patients during resuscitation.
Sympathetic Tone Preserves GFR Relative To Flow
- Extrinsic regulators include angiotensin II (constricts both arterioles) and sympathetic stimulation.
- Sympathetic tone reduces renal blood flow more than GFR because efferent constriction helps preserve filtration pressure.
Avoid NSAIDs In Vulnerable Renal States
- Avoid NSAIDs in acute renal failure because prostaglandin inhibition reduces renal vasodilation.
- Remember prostaglandins protect renal blood flow during vasoconstricted states.