Worked Examples: Equipment and Infection Control Failures

Equipment malfunctions and infection control breaches may seem less dramatic than medication errors or colleague impairment, but they are serious patient safety concerns that appear regularly in the UCAT SJT. This lesson covers the key scenarios you need to recognise and the correct responses for each.

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Part 1: Equipment Failures

Why Equipment Failures Matter

Modern healthcare depends on technology. When equipment fails, patients can be harmed directly (e.g., a ventilator stops working) or indirectly (e.g., a faulty monitor gives incorrect readings, leading to wrong clinical decisions).

Common Equipment Failure Scenarios

Equipment	Failure Type	Patient Risk
Infusion pump	Delivers wrong rate, occlusion alarm, free-flow	Drug overdose or underdose
Cardiac monitor	Incorrect readings, alarm fatigue, disconnected leads	Undetected arrhythmia or cardiac arrest
Oxygen supply	Empty cylinder, disconnected tubing, incorrect flow rate	Hypoxia
Ventilator	Alarm sounding, incorrect settings, circuit disconnection	Respiratory failure
Blood fridge	Temperature out of range, door left open	Spoiled blood products, transfusion reaction
Defibrillator	Battery dead, pads expired, not checked	Cannot resuscitate during cardiac arrest
Suction equipment	Not working, not set up at bedside	Cannot clear airway obstruction
Bed rails / equipment	Broken, missing, incorrectly positioned	Falls, patient injury

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Worked Example 1: The Malfunctioning Infusion Pump

Scenario:

You are a medical student observing on an oncology ward. A patient, Mrs Chen, is receiving chemotherapy via an IV infusion pump. You notice the pump display shows the infusion rate as 500ml/hr, but the label on the chemotherapy bag says "Infuse over 4 hours at 125ml/hr." No alarm is sounding.

Applying the SAFE Framework:

S — Spot the Risk: The pump is delivering chemotherapy at four times the prescribed rate. Chemotherapy drugs are highly toxic — a fourfold overdose could cause severe organ damage or death. This is an immediate patient safety emergency.

A — Act Appropriately: Act immediately. Do NOT attempt to adjust the pump yourself. Alert the nurse immediately.

F — Follow the Right Path:

1. Alert the nurse responsible for Mrs Chen: "I've noticed the infusion pump seems to be running at 500ml/hr, but the bag says it should be 125ml/hr. Could you check it urgently?"
2. If no nurse is immediately available, press the call bell and stay with the patient.
3. The nurse should stop the infusion, check the pump settings, and involve the medical team to assess Mrs Chen.

E — Ensure Follow-Up:

• The pump should be taken out of service and reported to medical engineering
• Mrs Chen needs monitoring for signs of chemotherapy toxicity
• The incident must be reported through the hospital's reporting system
• The medical team should be informed about the potential overdose

SJT Ratings:

Action	Rating
Immediately alert the nurse about the discrepancy	Very Appropriate
Stop the infusion pump yourself	Inappropriate — you are not trained to operate infusion pumps; you could cause a bolus or air embolism
Make a note to check the pump after the ward round	Very Inappropriate — the overdose is happening right now
Assume the rate was changed deliberately	Very Inappropriate — a fourfold discrepancy with no documentation is almost certainly an error

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Worked Example 2: The Emergency Equipment Check

Scenario:

You are on a placement in the Emergency Department. A senior nurse asks you to check the resuscitation trolley as part of the daily checks. When you open the defibrillator, you notice the battery indicator shows "LOW" and one of the sets of pads has an expiry date from six months ago. The nurse is busy with a patient.

Applying the SAFE Framework:

S — Spot the Risk: The defibrillator is a life-saving device. If a patient has a cardiac arrest and the defibrillator has a low battery or expired pads, it may not function — potentially resulting in death. The trolley should be in a state of readiness at all times.

A — Act Appropriately: This is not an emergency right now (no one is arresting), but it is an urgent equipment issue that must be resolved before it is needed.

F — Follow the Right Path:

1. Inform the nurse as soon as possible: "I've found an issue with the resus trolley — the defib battery is low and one set of pads has expired."
2. The nurse (or another appropriate staff member) should replace the pads, charge or replace the battery, and document the check.
3. If the nurse is unable to act immediately, inform the nurse in charge of the department.

E — Ensure Follow-Up:

• Confirm that the equipment has been fixed
• The expired pads and low battery should prompt a review of the daily checking process
• Ask yourself: has the trolley been checked daily as it should be?

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Worked Example 3: The Broken Bed Rail

Scenario:

You are on a care of the elderly ward. You notice that the bed rail on Mrs Thompson's bed is broken — it wobbles when you touch it and does not lock into the upright position. Mrs Thompson is 87, confused, and has been identified as a high falls risk. She is currently asleep.

Applying the SAFE Framework:

S — Spot the Risk: Mrs Thompson is a confused, elderly, high-falls-risk patient with a broken bed rail. If she tries to get out of bed (which confused patients often do), the broken rail could collapse, causing her to fall and sustain a serious injury — hip fracture, head injury, or worse.

A — Act Appropriately: This is not an immediate emergency (Mrs Thompson is asleep), but it is urgent — it needs to be fixed before she wakes or tries to move.

F — Follow the Right Path:

1. Inform the nurse responsible for Mrs Thompson immediately.
2. In the short term, alternative measures should be taken (e.g., lowering the bed to its lowest position, placing crash mats on the floor, increasing observation).
3. The broken bed should be reported to estates/maintenance for repair or replacement.

E — Ensure Follow-Up:

• Confirm that interim safety measures are in place
• Ensure the bed is repaired or replaced
• Document the hazard in the ward safety log

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Part 2: Infection Control Failures

Why Infection Control Matters