(e.g. mitral valve disease, dilated cardiomyopathy, hypertrophic cardiomyopathy)
⚠️
Clinical caution: Patients with cardiac disease are at increased risk of fluid overload. Monitor closely (RR/RE, lung sounds, weight, urine output). Consider slower rehydration and smaller, titrated boluses.
(e.g. tachycardia, weak pulses, pale mucous membranes, prolonged CRT, altered mentation)
🚑
Hypovolaemic shock: Prioritise rapid intravascular volume resuscitation with titrated boluses and frequent reassessment (perfusion parameters, lactate, urine output). Consider blood products where indicated. This calculator’s maintenance/deficit maths are unchanged.
Reveal the fluid therapy calculator when ticked.
Note: Diarrhoea or vomiting can cause additional fluid losses of approximately 5–10 ml/kg/day, depending on severity.
Total fluid for the replacement: Deficit + Maintenance + Ongoing Losses
Total fluid for the replacement: Deficit + Maintenance + Ongoing Losses
Dehydration Assessment Guide
| % Dehydration | Clinical Signs |
|---|---|
| <5% | Not clinically detectable |
| 5-6% | Subtle loss of skin elasticity |
| 6-8% | Definite skin tenting (1-2 seconds), slightly dry mucous membranes |
| 8-10% | Persistent skin tent (2-3 seconds), dry mucous membranes, possibly sunken eyes |
| 10-12% | Persistent skin tent (>3 seconds), very dry mucous membranes, sunken eyes, dull corneas, possibly signs of shock |
| >12% | Severe, life-threatening dehydration with signs of hypovolemic shock |
