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Related Concept Videos

Hemodialysis I: Introduction01:25

Hemodialysis I: Introduction

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...
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,...
Hemodialysis III: Nursing Management01:25

Hemodialysis III: Nursing Management

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...
Continuous Renal Replacement Therapy01:30

Continuous Renal Replacement Therapy

Continuous Renal Replacement Therapy, also known as CRRT, is a procedural treatment for acute kidney injury (AKI) that gradually removes uremic toxins and fluids while maintaining acid-base balance and stabilizing electrolytes. It is particularly useful for hemodynamically unstable patients. Unlike intermittent hemodialysis, which is faster, CRRT provides a gentler approach over 24 hours, closely mimicking the function of natural kidneys. However, CRRT is not ideal for patients with...
Dialysis01:27

Dialysis

Renal failure occurs when the kidneys lose their ability to filter waste products from the blood effectively. It can be classified into two types: acute renal failure (ARF) and chronic renal failure (CRF).
Acute kidney injury develops suddenly and can be caused by pre-renal causes (e.g., hypovolemia, shock), intrinsic renal causes (e.g., acute tubular necrosis), or post-renal causes (e.g., urinary obstruction). In contrast, chronic renal failure progresses gradually over time and is often...
Dialysis01:15

Dialysis

Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...

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Related Experiment Video

Updated: May 29, 2026

A Murine Model of Hemodialysis Access-Related Hand Dysfunction
08:39

A Murine Model of Hemodialysis Access-Related Hand Dysfunction

Published on: May 31, 2022

Standardized definitions for hemodialysis vascular access.

Timmy Lee1, Michele Mokrzycki, Louise Moist

  • 1Department of Internal Medicine, University of Cincinnati, Cincinnati, Ohio, USA.

Seminars in Dialysis
|September 13, 2011
PubMed
Summary

Vascular access dysfunction significantly impacts end-stage renal disease patients. The North American Vascular Access Consortium (NAVAC) aims to standardize definitions and improve hemodialysis access research through collaboration.

Related Experiment Videos

Last Updated: May 29, 2026

A Murine Model of Hemodialysis Access-Related Hand Dysfunction
08:39

A Murine Model of Hemodialysis Access-Related Hand Dysfunction

Published on: May 31, 2022

Area of Science:

  • Nephrology
  • Vascular Surgery
  • Clinical Research

Background:

  • Vascular access dysfunction is a major cause of morbidity and mortality in end-stage renal disease (ESRD) patients.
  • Dysfunction affects all hemodialysis (HD) access types: arteriovenous fistulas, arteriovenous grafts, and tunneled catheters.
  • Standardized terminology and classification are crucial for advancing clinical research in HD access dysfunction.

Purpose of the Study:

  • To establish standardized definitions for vascular access (VA) research.
  • To provide working definitions for epidemiology, function, patency, and complications across all VA types.
  • To facilitate improved quality and efficiency in vascular access research.

Main Methods:

  • Formation of the North American Vascular Access Consortium (NAVAC), a multidisciplinary, multicenter network of experts.
  • Consortium comprises nephrologists and interventional nephrologists with expertise in HD vascular access.
  • Focus on developing common standards for terminology and classification in vascular access research.

Main Results:

  • The consortium's initial manuscript provides standardized definitions for key aspects of vascular access.
  • Definitions cover epidemiology, vascular access function, vascular access patency, and complications.
  • These standards aim to unify research efforts and improve outcomes.

Conclusions:

  • Standardized definitions are essential for advancing research in hemodialysis vascular access dysfunction.
  • The NAVAC network will conduct observational studies and randomized controlled trials.
  • Improved research quality and efficiency are expected to impact patient outcomes positively.