Raised Potassium
Recognising Hyperkalaemia
Explore the clinical context, possible manifestations and why a raised potassium result may require prompt review and escalation.
Learn about hyperkalaemia →
Clinical Confidence • Student Nurse Guide
Electrolytes & Metabolic Deterioration for Student Nurses
Build a structured understanding of common electrolyte disturbances and metabolic emergencies, recognise patterns of deterioration and understand when changes require prompt assessment and escalation.
Clinical Confidence focus:
do not interpret an electrolyte or glucose result in isolation.
Consider the result alongside the patient's symptoms, observations,
clinical history, trends and overall condition, and escalate concerns
according to local policy and your level of competence.
Build the Pattern
From a laboratory result to the whole patient
Electrolyte and metabolic abnormalities can affect several body systems at once. The aim is not simply to memorise lists of signs, but to connect biochemical changes with the patient's clinical presentation and recognise when deterioration may be occurring.
The NurseNet Electrolyte & Metabolic Routine
Use the same reasoning structure whenever you encounter an abnormal electrolyte or glucose result.
1
Identify the Change
2
Assess the Patient
3
Look for Patterns
4
Review Trends
5
Escalate Concerns
Remember: the clinical significance of an abnormal
result depends on the individual patient, the degree and speed of
change, associated symptoms and observations, relevant medical history
and the wider clinical picture.
Electrolyte 1
Potassium disturbances
Potassium abnormalities are particularly important because changes can affect neuromuscular and cardiac function. Learn to recognise both directions of disturbance.
Low Potassium
Recognising Hypokalaemia
Understand how low potassium may present and how symptoms, observations and laboratory trends contribute to assessment.
Learn about hypokalaemia →
Electrolyte 2
Sodium disturbances
Sodium abnormalities are closely connected with fluid balance and neurological function. Assessment should always consider the wider clinical picture rather than the result alone.
Low Sodium
Recognising Hyponatraemia
Develop your recognition of low sodium and the neurological and systemic changes that may accompany clinically significant disturbance.
Learn about hyponatraemia →Raised Sodium
Recognising Hypernatraemia
Explore raised sodium in the context of hydration, fluid balance, neurological assessment and changes in the patient's condition.
Learn about hypernatraemia →
Electrolyte 3
Calcium disturbances
Calcium contributes to normal neuromuscular and cardiac function. Recognising the difference between low and raised calcium helps build a more complete metabolic assessment.
Low Calcium
Recognising Hypocalcaemia
Learn the patterns that may accompany reduced calcium and how to place them within the patient's wider assessment.
Learn about hypocalcaemia →Raised Calcium
Recognising Hypercalcaemia
Explore the clinical features that may occur with raised calcium and why changes in the patient's overall condition matter.
Learn about hypercalcaemia →
Electrolyte 4
Magnesium disturbances
Magnesium abnormalities may occur alongside other electrolyte disturbances. Build the habit of considering electrolyte results together rather than treating each value as an isolated finding.
Low Magnesium
Recognising Hypomagnesaemia
Understand the possible clinical manifestations of low magnesium and its relationship with broader electrolyte disturbance.
Learn about hypomagnesaemia →Raised Magnesium
Recognising Hypermagnesaemia
Explore how raised magnesium may affect the patient and why observations, symptoms and clinical context remain essential.
Learn about hypermagnesaemia →
Electrolyte 5
Phosphate disturbances
Phosphate plays an important role in cellular function and energy metabolism. Changes should be interpreted alongside the patient's nutritional, renal and wider clinical context.
Low Phosphate
Recognising Hypophosphataemia
Learn how low phosphate may affect the patient and why the underlying clinical context is important when interpreting it.
Learn about hypophosphataemia →Raised Phosphate
Recognising Hyperphosphataemia
Explore raised phosphate as part of a wider biochemical and clinical assessment rather than as an isolated laboratory result.
Learn about hyperphosphataemia →
Metabolic Assessment
Recognising glucose disturbance
Changes in blood glucose can cause significant deterioration. Student nurses should be able to recognise concerning patterns, assess the patient and escalate appropriately.
Low Blood Glucose
Recognising Hypoglycaemia
Develop your recognition of hypoglycaemia and understand why changes in neurological state, behaviour and physical condition require prompt attention.
Learn about hypoglycaemia →Raised Blood Glucose
Recognising Hyperglycaemia
Understand how raised blood glucose fits into the wider assessment of hydration, symptoms, observations and possible metabolic deterioration.
Learn about hyperglycaemia →Do not stop at the glucose result
When a patient with abnormal blood glucose appears unwell, assess the whole patient. Consider observations, hydration, neurological state, respiratory pattern, symptoms, trends and the wider clinical context, and escalate concerns promptly.
Recognise Deterioration
Hyperglycaemic emergencies
Once you understand hyperglycaemia, progress to two important hyperglycaemic emergencies. Focus on recognising the deteriorating patient and escalating appropriately rather than attempting to make a diagnosis from one finding.
Diabetic Ketoacidosis (DKA)
Learn to recognise the clinical pattern associated with DKA and connect glucose disturbance with hydration, breathing, circulation, neurological state and the patient's overall condition.
Recognise diabetic ketoacidosis →Hyperosmolar Hyperglycaemic State (HHS)
Explore the pattern associated with HHS and understand why significant hyperglycaemia, dehydration and changes in clinical condition require urgent assessment and escalation.
Recognise HHS →
Student nurse priority: if a patient appears acutely
unwell, use your structured assessment approach, obtain appropriate
observations within your competence, involve your registered
practitioner or supervisor and follow local escalation procedures.
Clinical Reasoning
Connect the result to the patient
A strong clinical assessment brings information together rather than focusing on a single abnormal value.
Step 1
Notice
Identify the abnormal result, symptoms, observation changes or other clinical cues that have prompted concern.
Step 2
Assess
Look at the whole patient. Use an appropriate structured assessment such as ABCDE when deterioration is suspected.
Step 3
Connect
Consider whether the biochemical result helps explain the patient's symptoms, observations or change from baseline.
Step 4
Trend
Where information is available, compare current findings with previous results and observations rather than relying on a single snapshot.
Step 5
Communicate
Communicate concerns clearly and concisely, including the relevant findings and changes you have identified.
Step 6
Escalate
Escalate deterioration according to local procedures, your level of competence and the urgency of the patient's clinical condition.
Continue Learning
Return to Clinical Confidence
Electrolyte and metabolic deterioration is one part of a wider clinical picture. Continue building your assessment and escalation skills across the NurseNet Clinical Confidence pathways.
Explore Clinical Confidence
Educational use: This NurseNet resource is designed
to support student nurse learning and clinical reasoning. It does not
replace individual patient assessment, local policies and escalation
procedures, clinical supervision, professional judgement or advice
from an appropriately qualified healthcare professional. Students
should work within their level of competence and seek support whenever
they are concerned about a patient's condition.
