Standard Operating Procedure: Dialysis Unit Operations

This Standard Operating Procedure (SOP) outlines the mandatory clinical and technical protocols for the safe, efficient, and sanitary operation of the dialysis unit. Adherence to these guidelines is critical to maintaining patient safety, preventing bloodborne pathogen transmission, and ensuring optimal therapeutic outcomes during hemodialysis sessions. All staff members are responsible for compliance with these protocols, which align with current nephrology nursing standards and infection control regulations.

1. Pre-Treatment Preparation and Patient Assessment

• Verify patient identity using two unique identifiers (Name and DOB).
• Conduct a pre-dialysis physical assessment: check weight (pre-dialysis), blood pressure, heart rate, temperature, and respiration.
• Inspect the vascular access site (fistula, graft, or catheter) for signs of infection, infiltration, or poor blood flow.
• Confirm the prescription: Verify dialyzer type, blood flow rate (BFR), dialysate flow rate (DFR), and fluid removal (ultrafiltration) goal.
• Perform hand hygiene and don appropriate Personal Protective Equipment (PPE).
• Sanitize the dialysis machine, prime the extracorporeal circuit with sterile saline, and confirm the absence of air bubbles.

2. Initiation of Hemodialysis

• Cleanse the access site according to facility antiseptic protocols (e.g., ChloraPrep or Betadine).
• Perform cannulation (or catheter connection) using aseptic technique.
• Secure all connections; verify that all clamps are in the correct position.
• Initiate blood flow at a low rate and gradually increase to the prescribed BFR.
• Monitor blood pressure and machine parameters for the first 15 minutes of initiation.
• Document the commencement of the session in the Electronic Health Record (EHR).

3. Monitoring and Intra-Treatment Safety

• Perform patient vitals check at a minimum of every 30–60 minutes, or as dictated by patient stability.
• Monitor machine status: arterial/venous pressures, transmembrane pressure (TMP), and conductivity/pH levels.
• Observe for adverse reactions: muscle cramps, hypotension, nausea, or signs of anaphylaxis.
• Ensure all alarms are audible and never silenced without clinical evaluation.
• Document any interventions (e.g., saline bolus, medication administration, parameter adjustments) in the EHR.

4. Termination of Dialysis and Post-Treatment

• Verify the total fluid removal goal has been achieved.
• Reduce blood flow rate gradually before clamping the venous line.
• Return blood to the patient via the venous access site using sterile saline.
• Disconnect the patient, ensuring stable hemostasis at the access site with appropriate pressure/dressings.
• Re-measure post-dialysis weight and vitals.
• Perform post-treatment assessment of the access site.
• Ensure the patient is stable before discharge from the unit.
• Complete machine disinfection cycle immediately following patient departure.

Pro Tips & Pitfalls

• Pro Tip: Always double-verify the ultrafiltration (fluid removal) goal with a second clinician. This is the most common area for human error.
• Pro Tip: Maintain a "Clean vs. Dirty" zone workflow to minimize the risk of cross-contamination between blood-handling and clean supplies.
• Pitfall: Never "silence and ignore" an alarm. Every alarm indicates a parameter deviation that could lead to clotting, air embolism, or patient injury.
• Pitfall: Avoid excessive manipulation of vascular access. Handling catheters unnecessarily increases the risk of CRBSI (Catheter-Related Bloodstream Infection).

FAQ

Q: What is the mandatory protocol if the dialysis machine experiences a power failure? A: Immediately switch to manual blood pump operation if necessary to return the blood to the patient. If the blood cannot be returned due to safety concerns, clamp the lines and disconnect the patient safely, prioritizing the maintenance of the vascular access.

Q: How often should the water treatment system be monitored? A: Water quality parameters (conductivity and chlorine/chloramine levels) must be tested and documented at the start of every shift and prior to the first patient treatment of the day.

Q: Can a patient's prescription be modified by the nursing staff during a session? A: No. Any changes to the dialysis prescription (including BFR, DFR, or fluid removal goals) must be authorized by a nephrologist and documented in the medical chart before implementation.