Passive Leg Raise Basics
This Passive Leg Raise Basics study guide preview is part of the WhiteBoard Medicine fluid resuscitation library for emergency medicine, critical care, resuscitation, and ICU learners. It is built to help clinicians connect bedside physiology with practical decisions before opening the full member study guide on Patreon.
Passive Leg Raise (PLR) Basics What Is the Passive Leg Raise Test? The Passive Leg Raise (PLR) is a reversible autotransfusion maneuver that mobilizes blood from the lower extremities and splanchnic circulation to the central circulation. It simulates a fluid bolus (~300–500 mL) to test for fluid responsiveness in real time — without giving actual IV fluids. If cardiac output increases during PLR, the patient is considered fluid responsive and may benefit from a fluid bolus. Physiologic Basis PLR increases preload by increasing venous return This mimics the effect of a fluid challenge If the stroke volume (SV) or cardiac output (CO) increases meaningfully in response, it suggests the heart is operating on the ascending limb of the Frank-Starling curve
For learners searching for fluid resuscitation education, this preview emphasizes indications, interpretation, bedside assessment, complications, and practical emergency critical care decision-making. The complete study guide adds the organized downloadable teaching file and related member resources.
Clinically, a Passive Leg Raise Basics resource is most useful when it helps the learner move from recognition to action. This preview is therefore written around the questions that come up during real emergency and critical care practice: what pattern is present, what physiology explains it, what complications matter, and what reassessment should happen next.
Key themes in the complete guide include the hemodynamic pattern and how to interpret it; management priorities and common escalation decisions; monitoring clues that should change bedside reassessment. These themes make the page useful for quick topic review, board-style preparation, ICU teaching, emergency medicine review, and bedside refreshers before opening the full WhiteBoard Medicine study guide collection.
This topic also connects to adjacent WhiteBoard Medicine resources, including blog previews, mini courses, and related study guide topics that help learners revisit the same physiology from multiple clinical angles.
- the hemodynamic pattern and how to interpret it
- management priorities and common escalation decisions
- monitoring clues that should change bedside reassessment