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Related Concept Videos

Hemodialysis II: Procedure and Complications01:24

Hemodialysis II: Procedure and Complications

DialyzersA hemodialysis (HD) dialyzer is a plastic cartridge containing thousands of parallel hollow fibers, which serve as semipermeable membranes. These fibers are typically made from cellulose-based or other synthetic materials. During HD, blood is pumped into the top of the cartridge and distributed among these fibers. Simultaneously, dialysis fluid, known as dialysate, is introduced into the bottom of the cartridge, bathing the outside of the fibers. Across the semipermeable membrane,...
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The nursing management of a patient undergoing hemodialysis includes several critical steps, starting with a thorough assessment before the procedure.Before the Hemodialysis ProcedureFirst, record the patient's vital signs—blood pressure, heart rate, respiratory rate, and temperature—to establish a baseline. This baseline is essential for detecting conditions such as hypotension that could impact the patient's response to dialysis. Document the patient's pre-dialysis weight, as this measurement...
Extracorporeal Removal of Drugs: Hemoperfusion and Hemofiltration01:25

Extracorporeal Removal of Drugs: Hemoperfusion and Hemofiltration

Hemoperfusion and hemofiltration are critical techniques in medical treatments to eliminate accumulated drugs, metabolites, and electrolytes from the bloodstream. These methods are particularly vital in cases of accidental poisoning and drug overdose.Hemoperfusion involves passing blood through an adsorbent material to remove unwanted substances. The main adsorbents used in hemoperfusion include activated charcoal and Amberlite resins. Activated charcoal can adsorb both polar and nonpolar...
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Hemodialysis (HD) is a medical treatment that artificially removes waste products, excess fluids, and toxins from the blood when the kidneys are no longer able to perform these functions effectively. In this process, blood is filtered through a semipermeable membrane, allowing for the selective removal of waste while preserving necessary components like blood cells and proteins. Hemodialysis is typically performed in patients with end-stage renal disease (ESRD) or severe kidney...
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Physiology of the Genitourinary System III: Urine Concentration and Dilution

The kidneys concentrate or dilute urine to maintain water and electrolyte balance. Nephrons, particularly the loop of Henle, play a crucial role in this process through the countercurrent multiplication system. This system establishes a high osmolarity in the renal medulla, which is essential for water reabsorption. In the loop of Henle’s descending limb, water is reabsorbed into the surrounding medulla due to its permeability to water. In contrast, the ascending limb actively transports...
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Updated: Jun 24, 2026

Description of a Swine Infant Model of Volume-Controlled Hemorrhagic Shock
09:09

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Published on: November 3, 2023

Acute normovolemic hemodilution.

Terri G Monk1

  • 1Department of Anesthesiology, Duke University Medical Center, North Carolina 27705, USA. monk0007@notes.duke.edu

Surgical Infections
|March 17, 2009
PubMed
Summary
This summary is machine-generated.

Acute normovolemic hemodilution offers a safer and more cost-effective alternative to autologous blood donation. This method enhances patient safety and can potentially eliminate the need for allogeneic transfusions when combined with other strategies.

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Area of Science:

  • Transfusion Medicine
  • Surgical Safety
  • Anesthesiology

Background:

  • Allogeneic blood transfusions carry inherent risks, prompting research into safer alternatives.
  • Current alternatives include iron supplementation, erythropoietin, autologous pre-donation, intraoperative blood salvage, acute normovolemic hemodilution, and artificial blood substitutes.

Purpose of the Study:

  • To evaluate the efficacy and safety of acute normovolemic hemodilution as an alternative to allogeneic blood transfusion.
  • To compare acute normovolemic hemodilution with autologous pre-donation in terms of cost and patient outcomes.

Main Methods:

  • A review of pertinent English-language literature was conducted.
  • The study synthesized findings on various blood conservation strategies.

Main Results:

  • Autologous pre-donation is declining due to patient cost, failure to eliminate clerical errors, and wastage of unused blood.
  • Acute normovolemic hemodilution is a safe alternative that reduces mistransfusion risks and minimizes red cell loss.
  • Studies show reduced perioperative transfusion rates in patients undergoing procedures like radical prostatectomy when using acute normovolemic hemodilution.

Conclusions:

  • Acute normovolemic hemodilution provides comparable outcomes to autologous pre-donation at a lower cost.
  • This technique enhances patient safety and, when combined with pharmacologic strategies, may eliminate the need for allogeneic blood transfusion.