Prediction of fluid challenge effect: filling pressure when left ventricular function is abnormal, diastolic volume
1Department of Anesthesiology & Critical Care & SAMU, Hôpital Lariboisière, Assistance Publique Hôpitaux de Paris & University Paris 7, 2 rue Ambroise Paré, 75475 Paris Cedex 10, France. dpayen1234@orange.fr
Critical Care (London, England)
|April 5, 2011
Summary
Predicting patient response to fluid resuscitation in intensive care is challenging. This study suggests using pre-administration volume for adequate left ventricular function and filling pressures for poor function to guide fluid therapy.
Area of Science:
- Cardiovascular Physiology
- Critical Care Medicine
- Hemodynamic Monitoring
Background:
- Fluid resuscitation is vital in intensive care but predicting cardiovascular response remains difficult.
- Identifying fluid responders versus non-responders is a persistent clinical challenge.
- Various invasive and non-invasive techniques exist to assess fluid challenge response.
Purpose of the Study:
- To evaluate the predictive value of filling pressures and diastolic volume for fluid challenge response in cardiovascular surgery patients.
- To explore the relationship between left ventricular function and the optimal parameter for predicting fluid responsiveness.
Main Methods:
- Assessed fluid challenge response in postoperative cardiovascular surgery patients.
- Utilized filling pressures and diastolic volume as predictive parameters.
- Correlated predictions with left ventricular global ejection fraction.
Main Results:
- When global ejection fraction is adequate, pre-administration volume effectively predicts fluid challenge response.
- When global ejection fraction is poor, filling pressure is a more suitable predictor of fluid challenge response.
- Findings highlight the importance of considering baseline cardiac function in fluid management.
Conclusions:
- The choice of parameter to predict fluid responsiveness depends on the patient's left ventricular function.
- This study provides insights into optimizing fluid resuscitation strategies in critical care.
- Further discussion on physiological and methodological aspects is warranted.
Related Concept Videos
01:29Heart Failure II: Pathophysiology
Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
01:26Imbalances in Cardiac Output
The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
01:27Regulation of Stroke Volume
The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
01:19Urodynamic Studies: Uroflowmetry
Uroflowmetry is a non-invasive urodynamic test designed to measure various aspects of urination, including volume, flow rate, and the time to void. This test is crucial for diagnosing and assessing conditions such as bladder outlet obstruction, bladder dysfunction, incomplete bladder emptying, incontinence, and urinary tract blockages caused by benign prostatic hyperplasia (BPH) and urethral strictures.Pre-Test Instructions:Before a uroflowmetry test, patients are typically advised to drink...
01:22Mitral Stenosis I: Introduction
Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
01:26Heart Failure III: Clinical Manifestations
Heart failure (HF) manifests primarily as dyspnea, fatigue, and fluid retention, resulting in peripheral and pulmonary edema. Symptoms may vary depending on which ventricle is more affected, left or right.Left-Sided Heart FailureAlso known as left ventricular failure, this condition results from the left ventricle's inability to fill or eject sufficient blood into the systemic circulation. It leads to pulmonary congestion, which occurs when the left ventricle fails to eject blood effectively...