Acute assessment of nausea and vomiting

A medical consult is recommended where there is no specific protocol for a condition

  • Always consider Sepsis — signs and symptoms can include
    • High or low temperature
    • Fast breathing
    • Fast pulse
    • Low BP or dizziness
    • Confusion and/or agitation
Red Flags — Urgent Medical Consult
  • Children (can dehydrate quickly)
  • Chest pain
  • Head injury — especially if taking anticoagulants
  • Severe prolonged vomiting blood or bile
  • Abnormal electrolytes (potassium, sodium)
  • Severe abdominal pain, rebound tenderness or distension
  • Severe dehydration and weight loss

Check

  • Calculate age-appropriate REWS
    • Adult — AVPU, RR, O2 sats, pulse, BP, Temp
    • Child (less than 13 years) — AVPU, respiratory distress, RR, O2 sats, pulse, central capillary refill time, Temp
  • Weight, BGL
  • If REWS score 3 or more — medical consult straight away
  • If available POC Test — WBC, electrolytes, ketones
  • U/A, pregnancy test 
  • Head-to-toe exam

Table 1.15  Some causes of nausea and vomiting  

Signs and symptoms

Possible cause

History suggesting head injury, bruising, decreased level of consciousness (coma scale)
One-sided weakness, speech difficulties
Ataxia (unsteadiness)

Head injury

Intracranial bleed (stroke)urgent medical consult

Problem swallowing
Food/fluids stuck in gullet

Uncoordinated swallowing, oesophageal blockage — medical consult

Blood in vomit

Oesophageal tear, oesophageal varices (complicating cirrhosis), penetrating peptic/ gastric ulcer medical consult

Right lower abdominal pain, mild fever

Appendicitis

Severe abdominal pain, marked tenderness, rebound or percussion tenderness, fever

Peritonitis medical consult

Severe upper abdominal pain that may radiate to back, epigastric tenderness

Pancreatitis — medical consult

Green bile, crampy abdominal pain, swollen belly, diarrhoea then no faeces

Bowel obstruction

Undigested food in vomit

High abdominal obstruction — medical consult

Abdominal cramps, diarrhoea
Abrupt onset within 4 hours of eating and others who ate the same meal affected

Gastroenteritis, food poisoning — medical consult
*If child with vomiting and significant pain, unlikely to be gastroenteritis — medical consult

Child with sweet odour of acetone and rapid breathing +/- abdominal pain (high BGL, elevated ketones, low pH and HCO3 on VBG)

Diabetes ketoacidosis

Small child with unusual odour, agitated or sedated, rapid or slow heart rate, high temperature, flushed, dilated or constricted pupils, ataxia  

Toxic Ingestion — medical consult

History of medicine consumption

Prescription medicines (eg morphine) medical consult

History of drug use
Alcohol — smell on breath, reduced inhibition, slurred speech, reduced motor control, bloodshot eyes
Cannabis — gets relief from hot shower

Drugs  

Alcohol

Cannabis

Pregnancy — usually first trimester

Morning sickness

Feeling of motion — room spinning, sweating, abnormal eye movements

Vertigo — also a symptom, need to determine cause — medical consult