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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,...
Peritoneal Dialysis I: Introduction and Procedure01:30

Peritoneal Dialysis I: Introduction and Procedure

Peritoneal dialysis (PD) is a procedure that facilitates the exchange of solutes, waste products, electrolytes, and excess fluid between the blood in the peritoneal capillaries and a dialysis solution introduced into the peritoneal cavity.Principles of Peritoneal Dialysis (PD)Diffusion: Waste products such as urea and electrolytes move from high concentrations in the blood to low concentrations in the dialysate across the peritoneal membrane. This mechanism is driven by the concentration...
Peritoneal Dialysis II: Peritoneal Dialysis Systems and Complications01:25

Peritoneal Dialysis II: Peritoneal Dialysis Systems and Complications

Peritoneal dialysis (PD) is a medical process that removes waste products and excess fluid from the body using the peritoneal membrane as a natural filter.Peritoneal Dialysis MethodsSeveral methods can be used for peritoneal dialysis, including Acute Intermittent Peritoneal Dialysis, Continuous Ambulatory Peritoneal Dialysis, and Automated Peritoneal Dialysis, also known as Continuous Cyclic Peritoneal Dialysis.Acute Intermittent Peritoneal Dialysis (AIPD) is used for patients with uremic...
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...
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...
Peritoneal Dialysis III: Nursing Management01:25

Peritoneal Dialysis III: Nursing Management

Peritoneal dialysis, or PD, utilizes the peritoneal membrane as a filter to eliminate excess fluid and waste products. Effective nursing management is essential for ensuring patient safety, preventing complications, and promoting optimal function of the peritoneal dialysis process.Assessment and MonitoringNurses must thoroughly assess the patient before, during, and after each dialysis session. Regular monitoring includes vital signs, daily weight, fluid intake and output, and laboratory values...

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Related Experiment Video

Updated: Jun 27, 2026

Surgical Techniques for Catheter Placement and 5/6 Nephrectomy in Murine Models of Peritoneal Dialysis
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Published on: July 19, 2018

[How much should dialysis time be increased when catheters are used?].

F Maduell1, M Vera, M Arias

  • 1Hospital Clínic, Barcelona. fmaduell@clinic.ub.es

Nefrologia : Publicacion Oficial De La Sociedad Espanola Nefrologia
|November 20, 2008
PubMed
Summary

Central venous catheters require longer hemodialysis sessions compared to arteriovenous fistulas. Patients using catheters may need an additional 30-60 minutes of dialysis to achieve adequate dialysis dose (Kt).

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Area of Science:

  • Nephrology
  • Vascular Surgery
  • Dialysis Technology

Context:

  • Central venous catheters are increasingly used for hemodialysis vascular access.
  • Despite advancements, catheters yield lower dialysis doses than native arteriovenous fistulas (AVF).
  • Catheter dysfunction, including lower blood flow and line inversion, can impact dialysis efficiency.

Purpose:

  • To evaluate the additional dialysis time required when using central venous catheters versus AVF.
  • To quantify the impact of blood flow (Qb) and catheter line orientation on dialysis session duration.

Summary:

  • A study compared hemodialysis sessions in 48 patients (20 with catheters, 28 with AVF).
  • Patients with AVF required increased time at lower Qb settings (30-350 ml/min).
  • Central catheter use necessitated longer sessions, with inverted lines requiring significantly more time to reach the target Kt of 45 L.

Impact:

  • Findings highlight the extended dialysis time needed for central catheter users.
  • Results emphasize the importance of optimal catheter function and AVF use for efficient hemodialysis.
  • This study informs clinical practice regarding vascular access choice and dialysis prescription.