Daily Clinical Briefing · Educational reading for healthcare professionals
Portal hypertension can coexist with low systemic blood pressure and deteriorating kidney function in cirrhosis.
Ask specifically about sleep–wake reversal when assessing for subtle hepatic encephalopathy.
A patient with cirrhosis develops increasing ascites, falling blood pressure and a rising creatinine. The pressure within the portal circulation is increasing, yet the kidneys may be receiving less blood. It sounds contradictory until we separate portal hypertension from systemic arterial perfusion.
Fibrosis stiffens the liver and impedes blood flowing through it. Portal pressure rises, contributing to ascites, splenic enlargement and varices. These are important clues, but portal hypertension alone does not establish cirrhosis. Splenomegaly is not specific either.
In decompensated cirrhosis, dilatation of the splanchnic circulation redirects arterial blood towards the gut. High portal pressure can therefore coexist with low systemic blood pressure and reduced renal perfusion. This altered circulation helps explain the renal dysfunction seen in hepatorenal syndrome.
There is another problem with recognising cirrhosis: the disease can progress quietly.
The liver has substantial functional reserve, so gradual loss of hepatocytes may cause relatively few symptoms initially. Aminotransferases can remain unimpressive while the liver's ability to perform its functions deteriorates. A falling albumin, rising international normalised ratio (INR) and increasing bilirubin may collectively tell a more important story than the magnitude of the enzyme elevations.
The assessment needs to extend beyond blood tests.
Impaired toxin clearance can produce hepatic encephalopathy, with sleep–wake reversal sometimes providing an early clue. Meanwhile, the liver's Kupffer cells normally clear bacteria arriving from the gut. Their dysfunction contributes to the increased infection risk associated with decompensated cirrhosis. Hepatocyte loss alone does not explain all the complications.
Elastography adds information, but measures liver stiffness rather than its underlying cause. Congestion and transient changes can elevate the measurement. A result that rises sharply and then falls does not necessarily indicate that fibrosis has developed and reversed over the same period.
Non-invasive fibrosis scores, including FIB-4, can help guide further assessment. When concern remains high despite uncertain findings, liver biopsy may still need consideration.
The practical approach is to build two pictures simultaneously: evidence of impaired hepatic function and evidence of portal hypertension. Compare albumin, INR and bilirubin over time, look for encephalopathy and infection, and interpret blood pressure and creatinine in the context of the changing circulation.
In a patient with worsening ascites and renal dysfunction, increasingly high portal pressure offers no reassurance about blood reaching the kidneys.
Dilated, hypertrophic and restrictive cardiomyopathies require different haemodynamic approaches. Echocardiography helps distinguish impaired contraction, dynamic outflow obstruction and poor ventricular filling, preventing treatments that might worsen obstruction and helping differentiate myocardial restriction from pericardial constriction.
Systolic and diastolic pressures reflect ventricular ejection, arterial compliance and vascular resistance. Pulse pressure and Korotkoff sound endpoints help interpret blood pressure measurements, while reduced arterial elasticity can widen the difference between systolic and diastolic readings.
Cirrhosis can progressively impair liver function without dramatic aminotransferase elevations. Portal hypertension, reduced bacterial clearance and splanchnic vasodilatation explain ascites, encephalopathy, infection risk and worsening renal perfusion, while elastography requires interpretation beyond the stiffness measurement alone.
Tracheostomy emergencies demand prompt assessment of tube patency, displacement, obstruction and haemorrhage. Failure to pass a suction catheter requires urgent reassessment, while distinguishing tracheostomy from laryngectomy is essential because patients with a laryngectomy breathe through their neck stoma.
In patients with suspected cirrhosis, compare albumin, INR and bilirubin with previous results rather than relying on aminotransferase elevations. When ascites worsens, review blood pressure and creatinine together and consider the effects of splanchnic vasodilatation on renal perfusion. Remain alert to encephalopathy and infection during decompensation.
A patient with established cirrhosis develops increasing ascites, falling systemic blood pressure and rising creatinine. Portal hypertension has become more pronounced. What circulatory mechanism explains worsening renal perfusion despite the increased portal pressure?
Splanchnic vasodilatation redirects arterial blood towards the gastrointestinal circulation, reducing systemic blood pressure and renal perfusion. This altered circulation contributes to the development of hepatorenal syndrome.
A patient with suspected cirrhosis has a markedly elevated liver stiffness measurement during an acute illness. Repeat elastography several weeks later shows a substantial reduction towards the previously elevated baseline. Does this indicate rapid regression of hepatic fibrosis?
No. Elastography measures stiffness rather than fibrosis directly. Congestion and transient changes can increase liver stiffness, so a rapid reduction does not necessarily represent an equivalent change in hepatic fibrosis.
An adult with a neck stoma develops acute respiratory deterioration. The clinical history confirms a previous total laryngectomy. Which route must be used to secure the airway, and why is oral intubation inappropriate?
Airway management must take place through the neck stoma. Patients who have undergone total laryngectomy breathe through the stoma, and upper-airway intubation cannot secure their airway.
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