Delirium: Acute Brain Failure and How to Reason Through It

 Delirium is not “confusion”. It is acute failure of the brain’s ability to maintain homeostasis, usually triggered by illness elsewhere in the body. When attention collapses, the cortex is signalling that its metabolic, inflammatory, or neurotransmitter environment has become unsafe.

Unlike dementia, which reflects slow structural decline, delirium develops over hours to days, fluctuates, and is usually reversible when the underlying insult is corrected.

Delirium is common, dangerous, and frequently missed — especially the quiet forms.

ECG Interpretation: A Reasoning-Based Guide 🫀

 An ECG is a simple, non-invasive test that records the electrical activity of the heart over a period of time. By placing electrodes on the skin, we can detect the tiny electrical changes that occur with each heartbeat. ⚡

Interpreting an ECG isn’t just about spotting abnormalities — it’s about understanding the heart’s electrical story in the context of the patient. This guide breaks down the process step by step. 

Dementia: When Cognitive Networks Begin to Fail

 Mrs K is a 72-year-old retired teacher who presents to her GP after becoming lost while driving home from the supermarket she has visited weekly for 20 years.

Her daughter reports that:

• she repeats questions within the same conversation
• she has stopped attending social activities
• she struggles to organise meals she previously prepared routinely

Her neurological examination is normal.

Her blood tests are normal.

Her CT scan is reported as “age-appropriate”.

So what is actually going wrong?

Principles of Managing Dehydration 💧

Dehydration is a common but potentially serious clinical condition that reflects a failure of the body to maintain fluid and electrolyte balance — a core example of disrupted homeostasis.

Even small fluid deficits can impair circulation, organ perfusion, and cellular function, particularly in infants, older adults, and unwell patients.

Understanding Vital Signs: A Clinical Perspective

 Vital signs provide immediate, objective insights into a patient’s physiological status and are often the earliest indicators of deterioration or underlying pathology. As healthcare professionals, accurate measurement and interpretation of these parameters is essential for guiding assessment and clinical decision-making.

Understanding common fracture types 🦴

 Fractures are important—not just because they’re common, but because they reveal how bones respond to force, age, and physiology. One way to think about them is as patterns left behind by trauma: each shape tells you something about the mechanism, the anatomy involved, and what might go wrong next.

In this post, we’ll walk through common fracture types and explore how to reason through them. Not just what they look like, but why they happen, how they present, and what they mean for your patient.  

Understanding, investigating and managing pericarditis

You’ll hear it described as “sharp chest pain,” “worse when lying flat,” or “relieved by sitting forward.” But what’s actually happening when someone has pericarditis—and how do we reason through it clinically?

Let’s explore the pathophysiology first, then walk through how to spot it, investigate it, and manage it.

🧠 Psychosis or delirium : a complex interplay

Acute physical illness doesn’t just affect the body - it can destabilize the mind. For patients with schizophrenia, dementia or other psychotic or neurodegenerative disorders, infections like pneumonia or urinary tract infections can trigger agitation, paranoia, or hallucinations. 

Understanding this interplay is essential for safe, compassionate care in hospital settings.