Upper and lower GI bleeding: recognising it, monitoring, two lines and getting ready for endoscopy
- Assessment
In GI bleeding the nurse spots the signs, watches for shock, places two wide IV lines and gets the patient ready for an early endoscopy.
What it is
Gastrointestinal bleeding can be too small to see or large enough to threaten life. Vomited blood, coffee-ground vomit and black, tarry stools point to the upper tract; blood from the rectum, from streaks to large amounts, is the usual sign of a lower source. The nurse's part is to recognise the bleed, measure how unstable the patient is with the early warning score, secure intravenous access, give fluids and blood as prescribed, protect the airway, prepare for endoscopy and watch for rebleeding. The causes and medical treatment are on the linked condition pages.
Reference values
- Upper source: vomited blood or coffee-ground material; black, tarry stools (melaena).
- Lower source: blood from the rectum, on the toilet paper, streaked in the stool or in large amounts.
- Blood loss and shock: fast pulse, low blood pressure, dizziness or light-headedness, fainting, sweating, confusion, chest pain or breathlessness.
- Blood tests the team usually orders: full blood count, clotting tests and platelet count.
- Risk score: the team calculates the Glasgow-Blatchford score at presentation; a very low score may allow care as an outpatient.
- Anticoagulants and antiplatelets: the team decides at presentation which to stop and plans when to restart them.
How to measure it (and why)
- Ask about and look at vomit and stools: colour, amount and when it started — the colour helps tell an upper from a lower source.
- Take full observations and score them with the early warning score — it shows shock early and sets how often you repeat them.
- Insert two large-bore peripheral cannulas and draw the blood tests ordered — fluids and blood need fast access.
- Give fluids and blood exactly as prescribed and reassess after each bolus — the aim is perfusion, guided by repeated checks.
- Keep the patient nil by mouth and watch the airway closely — heavy vomiting of blood can be inhaled.
- Take a full medicine history: anticoagulants, antiplatelets, aspirin and other NSAIDs — the team decides what to stop.
- Prepare for endoscopy: fasting, consent, dentures out, working IV line — sedation and the scope need these.
- After endoscopy, give nothing by mouth until the gag reflex returns and monitor observations — choking and sedation effects.
- Watch for rebleeding each shift: new blood in vomit or stool, pulse, blood pressure and the haemoglobin trend.
How to read it
- Vomited blood, coffee-ground vomit and melaena are the signs that trigger the upper GI bleeding bundle.
- A normal first haemoglobin does not rule out a large bleed: it can be falsely high while blood volume is low.
- In known or suspected cirrhosis, think of varices: the team starts a vasoactive medicine and antibiotics urgently, before endoscopy.
- Instability that persists despite fluids needs a critical care review and may need the major haemorrhage protocol.
- After endoscopy, rare but serious risks are a tear in the gut wall, bleeding at a biopsy site and reactions to sedation.
Next step: when to call for help
- Call at once and activate the rapid response if vomited blood, melaena or rectal blood comes with a fast pulse, low blood pressure, dizziness or confusion.
- Call if the early warning score rises or the blood pressure stays low after a fluid bolus.
- Call for any sign of rebleeding: new blood, a falling haemoglobin, a rising pulse or a falling blood pressure.
- Call for severe abdominal or chest pain, breathlessness or slow breathing after endoscopy.
- Report the medicine history (anticoagulants, antiplatelets, NSAIDs) to the team as soon as it is known.
Test yourself
Think of the answer, then tap the question to see it.
Which signs point to an upper GI bleed?
Vomited blood, coffee-ground vomit and black, tarry stools (melaena).
Why are two large-bore peripheral cannulas preferred to a central line in a bleeding patient?
Short, wide peripheral lines run fluids and blood faster; a central line is kept for when peripheral access fails.
Why can a first normal haemoglobin be misleading?
Early in a large bleed blood volume is low, so haemoglobin can look falsely normal or high. The patient's observations matter more.
When may the patient eat or drink after an upper endoscopy?
Only when the gag reflex has returned, to avoid choking, and following the team's instructions.
Elsewhere in DurgiPedia
Connections
Educational content for students; it does not replace your institution's protocols, supervised clinical training or a prescriber's order. Dose-calculation examples use made-up numbers: they are educational, not a clinical order.
Sources: Gastrointestinal bleeding (MedlinePlus, U.S. National Library of Medicine, 2026); British Society of Gastroenterology (BSG)-led multisociety consensus care bundle for the early clinical management of acute upper gastrointestinal bleeding (Frontline Gastroenterology (open access, PMC), 2020); Update on the management of upper gastrointestinal bleeding (BMJ Medicine (open access, PMC), 2022); EGD - esophagogastroduodenoscopy (MedlinePlus, U.S. National Library of Medicine, 2026).
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Representative model, for educational purposes only.