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Nephrology and Dialysis Care Risk Assessment: Treatment Safety, Infection and Continuity Controls

A worked example of how a dialysis unit finds, scores and controls the risks that threaten patient safety, from access infection and water quality to missed deterioration, equipment failure and record privacy.

Updated November 2026 8 hazards assessed Review every 6 months Highest risk: Critical to Medium
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Executive summary

This assessment shows how a dialysis unit can find, rate and control the risks that matter most to patient safety and trust. Eight risks were chosen because they are plausible in everyday dialysis, nursing and technical work. Missed deterioration between sessions carries the highest inherent score, because potassium, fluid and blood pressure changes can become dangerous quickly. Access infection, medication errors and water or dialysate quality problems are also high before controls. After existing and added controls, most risks fall to Medium or Low, but deterioration and access infection remain under close watch because patient harm is serious. The first actions are a structured handover tool, a second check on high risk medicines, a review of water test trends and a tested downtime plan. Every score illustrates method only, and each treatment decision stays with the treating clinician.

Focus area
Nephrology, dialysis and renal care
Setting
Outpatient in-center dialysis unit within a wider renal service, with nephrology clinicians, specialist dialysis nurses and technicians
Method
Five by five likelihood and impact risk register

Scope

This assessment covers in-center hemodialysis care for adults with chronic kidney failure, from arrival and vascular access through treatment, handover and discharge. It looks at risks to patient safety, infection control, equipment, records and staff. Jurisdiction, unit size, machine model and water treatment design are not specified, so these are treated as assumptions. It does not replace clinical judgment, local protocols or a formal site-specific assessment.

Context

The unit runs several treatment sessions a day in shifts, with dialysis nurses, nephrology physicians, a renal dietitian, technicians who maintain the machines and water plant, and clerical staff who manage records. Patients attend several times a week and bring long term vascular access, medicines and fluid limits. Treatment records are kept in an electronic system alongside paper charts. Each risk is scored before controls to show its natural level, then again after the existing controls and the additional controls that should be added. Clinical decisions remain with licensed clinicians.

Objectives, assets and stakeholders

The objective is to deliver safe, effective and dignified dialysis, prevent avoidable harm and infection, protect patient information, and keep the service running when equipment or staff are short. The assets in scope are patients and their vascular access, the dialysis machines and water treatment plant, prescriptions and medicines, treatment records and the electronic system, and the skill and wellbeing of the team. Stakeholders include patients and families, nephrologists, dialysis nurses, technicians, dietitians, the unit manager, the governance committee, referring physicians and regulators. Every risk has one owner role, and the unit manager reports the register to the governance committee each quarter and after any serious incident.

Risk matrix: before and after controls

Each cell shows hazard numbers placed by likelihood and impact. Compare the two grids to see how controls move each hazard.

Before controls

Inherent risk

Risk before controls: rows are likelihood from almost certain to rare, columns are impact from insignificant to catastrophic. Cells list hazard numbers.
1
Insignificant		 2
Minor		 3
Moderate		 4
Major		 5
Catastrophic
5 Almost certain
4 Likely Likelihood 4, impact 4, score 16, high: H01 H03 Likelihood 4, impact 5, score 20, critical: H04
3 Possible Likelihood 3, impact 3, score 9, medium: H07 H08 Likelihood 3, impact 4, score 12, high: H06 Likelihood 3, impact 5, score 15, high: H02
2 Unlikely Likelihood 2, impact 4, score 8, medium: H05
1 Rare

After controls

Residual risk

Risk after controls: rows are likelihood from almost certain to rare, columns are impact from insignificant to catastrophic. Cells list hazard numbers.
1
Insignificant		 2
Minor		 3
Moderate		 4
Major		 5
Catastrophic
5 Almost certain
4 Likely
3 Possible
2 Unlikely Likelihood 2, impact 3, score 6, medium: H01 H05 H06 H07 Likelihood 2, impact 4, score 8, medium: H02 H03 H04
1 Rare Likelihood 1, impact 3, score 3, low: H08
  • Low 1 to 4
  • Medium 5 to 9
  • High 10 to 16
  • Critical 17 to 25

Hazard register

A summary first, then the detail for each hazard.

Summary of hazards with scores before and after controls
No.HazardBeforeAfterOwner
H01 Vascular access and bloodstream infection 16 High 6 Medium Dialysis nurse lead
H02 Dialysate and water treatment quality 15 High 8 Medium Technical lead
H03 Medication and prescription errors 16 High 8 Medium Nephrology lead
H04 Missed clinical deterioration between sessions 20 Critical 8 Medium Charge nurse
H05 Equipment failure and loss of power during treatment 8 Medium 6 Medium Technical lead
H06 Privacy breach and consent documentation gaps 12 High 6 Medium Information governance lead
H07 Staffing shortage and handover failure 9 Medium 6 Medium Unit manager
H08 Occupational exposure to blood and disinfectants 9 Medium 3 Low Infection prevention lead
H01

Vascular access and bloodstream infection

Safety Before 16 After 6

Catheter or fistula sites are handled without full aseptic technique, or colonized lines are used, so bacteria enter the bloodstream and the patient becomes septic during or after treatment.

Who or what is affected: Patients on dialysis, nurses and visiting families

Causes

Long term catheters, contamination during connection and busy sessions with few staff.

Consequences

Bloodstream infection, sepsis, hospital admission, loss of access and in rare cases death.

Existing controls

  • Cannulation follows a written aseptic technique checklist.
  • Catheter dressings are changed on a fixed schedule by trained staff.

Control gaps

Checklist use is not audited, and culture results are not reviewed as a trend.

Additional controls

  • Prevent: Use a single trained cannulation team and observe each insertion against the checklist.
  • Detect: Review culture results and access site signs at every session and report trends monthly.
Likelihood 4 x impact 4 before; 2 x 3 after Owner: Dialysis nurse lead Target: Within 30 days Early warning: Positive blood or access site cultures, or access site infections, reported in a rolling month.
H02

Dialysate and water treatment quality

Safety Before 15 After 8

Water treatment fails to remove contaminants, or dialysate is prepared with the wrong concentrate, so patients receive toxins, electrolyte imbalance or endotoxin exposure.

Who or what is affected: Patients, technicians and the wider unit

Causes

Filter wear, biofilm in pipework, mislabeled concentrate and missed maintenance.

Consequences

Toxic exposure, hypotension, electrolyte disturbance, infection and withdrawal of machines from service.

Existing controls

  • Water is tested on a set schedule and results are logged.
  • Machines run a disinfection cycle between patients.

Control gaps

Trend analysis is not done and filter change dates depend on memory.

Additional controls

  • Prevent: Check concentrate labels and conductivity against the prescription before each session starts.
  • Detect: Trend water test results weekly and act on any result that approaches the agreed limit.
Likelihood 3 x impact 5 before; 2 x 4 after Owner: Technical lead Target: Within 60 days Early warning: Any water test that is late or sits near the upper limit of the agreed range.
H03

Medication and prescription errors

Safety Before 16 After 8

High risk medicines such as heparin, insulin, potassium binders, erythropoiesis agents or antibiotics are prescribed, transcribed or given at the wrong dose, route or time, or are omitted at the end of a session.

Who or what is affected: Patients, nurses, prescribers and pharmacists

Causes

Dose changes between sessions, busy shifts and unclear transcription from paper orders.

Consequences

Bleeding, hypoglycemia, dangerous potassium levels, cardiac events and avoidable harm.

Existing controls

  • Prescriptions are entered on the electronic system with dose limits.
  • Nurses confirm patient identity before giving any medicine.

Control gaps

The second check is not recorded, and medicine reconciliation is done only at admission.

Additional controls

  • Prevent: Require a second independent check for high risk medicines and any dose change.
  • Respond: Stop the infusion, assess the patient and report the event through the incident system the same shift.
Likelihood 4 x impact 4 before; 2 x 4 after Owner: Nephrology lead Target: Within 30 days Early warning: High risk medicine orders without a documented second check.
H04

Missed clinical deterioration between sessions

Safety Before 20 After 8

Rising potassium, fluid overload, low blood pressure, chest pain or confusion are not recognized or escalated early, so a patient deteriorates between sessions or during treatment.

Who or what is affected: Patients, nurses, nephrologists and families

Causes

Weight gain between sessions, missed blood tests, unfamiliar patients and handovers without clear priorities.

Consequences

Cardiac arrhythmia, pulmonary edema, stroke, emergency transfer and death.

Existing controls

  • Pre-dialysis weights and vital signs are recorded at each session.
  • A nephrologist is on call for urgent review out of hours.

Control gaps

Early warning scores are not standard across all sessions and out-of-hours escalation depends on memory.

Additional controls

  • Prevent: Set agreed fluid and potassium limits for each patient and show them on the treatment record.
  • Detect: Apply an early warning score at each hour of treatment and escalate any score above the agreed threshold.
Likelihood 4 x impact 5 before; 2 x 4 after Owner: Charge nurse Target: Within 30 days Early warning: Patients with a potassium or fluid gain outside agreed limits at two consecutive sessions.
H05

Equipment failure and loss of power during treatment

Operational Before 8 After 6

Dialysis machines, water plant, alarms or the power supply fail during treatment or during a shift, leaving patients partly treated or without a safe option to continue.

Who or what is affected: Patients, technicians and the on call team

Causes

Aging machines, missed service, faulty alarm sensors and extended power loss.

Consequences

Interrupted treatment, delayed transfer, harm to patients and loss of confidence in the unit.

Existing controls

  • Machines are serviced on the manufacturer schedule by trained technicians.
  • The building has a standby generator tested each month.

Control gaps

Generator tests do not include a full dialysis load, and downtime drills are not timed.

Additional controls

  • Prevent: Keep a spare machine and a written plan for machine swaps during treatment.
  • Recover: Test the downtime plan each quarter and record how long safe transfer takes.
Likelihood 2 x impact 4 before; 2 x 3 after Owner: Technical lead Target: Within 60 days Early warning: Machines with overdue service or repeated alarm faults in a rolling month.
H06

Privacy breach and consent documentation gaps

Technology and data Before 12 After 6

Patient records are viewed or sent by people without a need to know, consent for treatment and data sharing is missing or out of date, or paper charts and screens are left open where others can see them.

Who or what is affected: Patients, families and staff

Causes

Shared logins, shift changes, unclear consent forms and clutter on nursing stations.

Consequences

Loss of patient trust, breach reporting duties, disciplinary action and legal challenge.

Existing controls

  • Records are held in a password protected electronic system.
  • Staff sign a confidentiality agreement when they join.

Control gaps

Access reviews are done once a year and consent records are not checked before treatment.

Additional controls

  • Prevent: Review access rights against current roles and remove any that no longer fit.
  • Detect: Audit record access each month and investigate any access without a clinical reason.
Likelihood 3 x impact 4 before; 2 x 3 after Owner: Information governance lead Target: Within 60 days Early warning: Record access logs that show views of patients not assigned to that staff member on that shift.
H07

Staffing shortage and handover failure

People Before 9 After 6

Sessions run with fewer nurses or technicians than planned, or handovers between shifts omit key facts about access, medicines, weights or concerns, so care gaps appear.

Who or what is affected: Patients, nurses and technicians

Causes

Sickness, vacancies, rushed handovers and heavy workloads.

Consequences

Missed doses, missed alarms, treatment errors and staff burnout.

Existing controls

  • A minimum safe staffing level is set for each session.
  • Handover is recorded on a standard form at the end of each shift.

Control gaps

Handover forms are often incomplete and bank staff are not always briefed on the unit.

Additional controls

  • Prevent: Use a structured handover tool, such as SBAR, with a verbal check at the chair.
  • Respond: Activate the bank staff roster and limit new starts when cover falls below the minimum.
Likelihood 3 x impact 3 before; 2 x 3 after Owner: Unit manager Target: Within 30 days Early warning: Shifts with a staffing gap or a handover recorded as incomplete.
H08

Occupational exposure to blood and disinfectants

Safety Before 9 After 3

Staff are cut or stuck with needles, splashed with blood, or handle concentrated disinfectants and hazardous drugs without adequate protection, leading to infection or chemical injury.

Who or what is affected: Dialysis nurses, technicians and cleaners

Causes

Busy sessions, reused equipment, missing gloves and unclear disinfectant labels.

Consequences

Bloodborne infection, chemical burns, respiratory harm and sickness absence.

Existing controls

  • Personal protective equipment is stocked at each station.
  • Sharps bins are placed at each chair and treatment bay.

Control gaps

Exposure reports are under recorded and disinfectant dilution is not checked.

Additional controls

  • Prevent: Use safety needles and retractable devices and rotate sharps disposal duties so bins do not overfill.
  • Respond: Give immediate post exposure assessment and follow up after any needle stick or splash.
Likelihood 3 x impact 3 before; 1 x 3 after Owner: Infection prevention lead Target: Within 45 days Early warning: Sharps injury or splash reports that are not logged within the same shift.

Rating method and evaluation

Each risk is rated on two five-point scales. Likelihood runs from Rare to Almost certain, and impact runs from Negligible to Catastrophic, with patient harm weighted most heavily. Multiplying the two gives a score from 1 to 25, which falls into one of four bands: Low from 1 to 4, Medium from 5 to 9, High from 10 to 16 and Critical from 17 to 25. The score guides the order of work and is not a measurement of clinical risk. Inherent risk is the score before any controls. Residual risk is the score after the existing and additional controls are in place, and it must never be higher than the inherent score. Critical and High risks need senior clinical attention and a dated plan. Medium risks need routine controls and a named owner. Low risks are accepted and watched. Ratings are challenged at each review by nurses, technicians and patient representatives who did not write the original score, and any rating is reviewed sooner if a monitoring indicator reaches its threshold or an incident occurs. Clinical judgment always overrides a numerical score.

Likelihood, impact and rating bands

Likelihood

  • 5 Almost certain: Expected to happen in most circumstances.
  • 4 Likely: Will probably happen in many circumstances.
  • 3 Possible: Could happen at some time.
  • 2 Unlikely: Not expected, but it could happen.
  • 1 Rare: Only in exceptional circumstances.

Impact

  • 1 Insignificant: No lasting effect. Handled within routine work.
  • 2 Minor: Small effect that is quickly corrected.
  • 3 Moderate: Noticeable effect that needs managed effort to correct.
  • 4 Major: Serious effect on people, delivery or reputation.
  • 5 Catastrophic: Severe or lasting effect that threatens the whole activity.

Bands (likelihood x impact)

  • Low (1 to 4): Accept and monitor.
  • Medium (5 to 9): Manage with routine controls.
  • High (10 to 16): Senior attention and a treatment plan.
  • Critical (17 to 25): Act first. Do not proceed until reduced.

Monitoring, escalation and review

Review this assessment every 6 months, and sooner when an indicator below reaches its threshold.

Early-warning indicators and escalation thresholds
Indicator to watchEscalate when
Patients with a potassium or fluid gain outside agreed limits at two consecutive sessions.Escalate to the nephrologist on duty at once, and to the unit medical lead if the pattern repeats within one week.
Positive blood or access site cultures, or access site infections, reported in a rolling month.Escalate to the infection prevention lead within 24 hours, and to the governance committee if two cases are linked.
Water or dialysate test results outside the agreed range or overdue.Escalate to the technical lead at once and take the affected machines out of use until retested, with the unit manager informed the same day.
High risk medicine orders without a documented second check.Escalate to the nephrology lead when any order is missed, and to the unit manager if more than one occurs in a month.
Shifts with a staffing gap or a handover recorded as incomplete.Escalate to the unit manager before the shift starts when cover is short, and to the governance committee if gaps persist for two weeks.

Contingency arrangements

If a serious event occurs, such as a bloodstream infection cluster, a water contamination alert, a power failure or a suspected medication error, the charge nurse stops the affected treatments and calls the nephrologist on duty. Patients are assessed and moved to safe care according to the unit emergency plan. The technician isolates the affected machine or water loop, and the unit manager arranges backup machines or transfer to a neighboring unit. Records are preserved, the governance lead is informed, and patients and families are told early and plainly what has happened and what happens next.

Prioritized action plan

  1. Introduce a structured handover and early warning score review for every session, owner charge nurse, within 30 days.
  2. Add a second independent check for high risk medicines and prescription changes, owner nephrology lead, within 30 days.
  3. Review vascular access bundle compliance and infection surveillance each month, owner infection prevention lead, within 45 days.
  4. Test water and dialysate monitoring and the downtime plan for power loss, owner technical lead, within 60 days.
  5. Confirm consent and record access rights against current roles, owner information governance lead, within 60 days.

Conclusion

Safe dialysis rests on steady habits: structured handover, a second check on high risk medicines, disciplined vascular access care, tested water and equipment, and clear escalation when a patient's numbers change. The highest scores sit with missed deterioration, access infection and medication error, and each has actions that lower the residual score. Treat the register as a living record, review it on the stated cycle, and seek specialist clinical and legal advice for any real patient, device or privacy question.

Assumptions and limitations

Assumptions

  • Treatment is in-center hemodialysis for adults, with a nephrology team that sets prescriptions.
  • Jurisdiction, accreditation regime and machine model are not specified, so duties are described in general terms only.
  • Water treatment is provided by a managed plant maintained by trained technicians.

Limitations

  • The scores are examples for learning and do not describe any real unit or patient group.
  • Clinical standards, device rules and privacy duties vary by location and change over time, so specialist review is needed.
  • This is educational content and is not clinical, medical, nursing or legal advice.

Related frameworks to study

  • Hierarchy of controls
  • Failure mode and effects analysis
  • Structured handover communication such as SBAR
  • Early warning score approach to deterioration
  • Root cause analysis for incidents

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For Learning Reference Only: This assessment demonstrates how risk assessment principles are applied in a practical setting, providing a useful reference for learning and understanding. Actual assessments may be adapted to suit specific site conditions and circumstances.

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