Recognising Gastrointestinal Bleeding for Student Nurses
Learn how to recognise possible gastrointestinal bleeding, assess the patient systematically and identify patterns that may indicate significant blood loss or wider deterioration.
How might gastrointestinal bleeding present?
Gastrointestinal bleeding may be obvious or relatively subtle. Patients may report vomiting blood, passing altered or fresh blood in stool, or symptoms associated with blood loss before you directly observe bleeding.
Vomiting blood
Vomited blood may appear fresh and red or have a darker altered appearance.
Dark stool
Digested blood may produce very dark, tar-like stool with a characteristic appearance.
Fresh rectal blood
Fresh blood may be noticed in or around stool or reported directly by the patient.
Look for the patient's response to blood loss
| Finding | What you may notice | Why it matters |
|---|---|---|
| Tachycardia | Pulse rises from the patient's usual baseline. | An increasing pulse may accompany physiological compensation for blood loss or wider deterioration. |
| Falling blood pressure | Blood pressure progressively decreases. | This may indicate developing circulatory compromise. |
| Pallor | The patient appears noticeably pale compared with usual. | Pallor can contribute to the wider clinical picture. |
| Cool or clammy skin | The patient becomes sweaty, cool or peripherally poorly perfused. | These changes can accompany circulatory stress. |
| Dizziness or weakness | The patient reports feeling faint, weak or unable to stand normally. | Symptoms may accompany reduced circulating volume or impaired perfusion. |
| Altered consciousness | New confusion, agitation, drowsiness or collapse. | Neurological change increases concern about significant deterioration. |
The combination matters
Gastrointestinal bleeding combined with tachycardia, falling blood pressure, pallor, dizziness or altered consciousness should raise concern about significant physiological deterioration.
Assess the whole patient systematically
Airway
Confirm that the airway is patent, particularly if the patient has vomited blood or has reduced consciousness.
Breathing
Assess respiratory rate, oxygen saturation, work of breathing and any associated breathlessness.
Circulation
Assess pulse, blood pressure, peripheral perfusion, skin and the apparent bleeding pattern.
Disability
Look for dizziness, confusion, drowsiness, agitation or reduced responsiveness.
Exposure
Observe relevant bleeding, stool, vomit and other findings while maintaining privacy and dignity.
Escalate
Obtain prompt registered or emergency support when bleeding is significant or accompanied by deterioration.
Ask focused questions
A brief, structured history can help describe what has happened while clinical assessment and escalation continue.
What happened?
Ask whether blood was vomited or passed rectally, when it began and whether it has happened more than once.
How does the patient feel?
Ask about dizziness, weakness, abdominal pain, nausea, breathlessness and collapse.
What else is relevant?
Medication history, known conditions and recent clinical events may be relevant to the registered clinician's assessment.
Watch for developing circulatory deterioration
Stable observations
Patient alert, pulse 78 and blood pressure close to their normal baseline.
Bleeding reported
The patient reports passing a dark stool and begins to feel weak and light-headed.
Wider deterioration
Pulse has risen substantially, blood pressure has fallen and the patient appears pale and clammy.
The observation trend can reveal severity
A developing combination of bleeding, tachycardia, hypotension, weakness and poor peripheral perfusion is more concerning than the appearance of the stool alone.
Putting the findings together
Example
A patient tells you they have just passed a very dark stool and feel suddenly weak and dizzy.
Earlier their pulse was 80 beats per minute. It is now 116. Their blood pressure has also fallen from previous observations.
They appear pale and their skin feels cool and clammy.
The concern is the combined pattern of possible gastrointestinal bleeding, tachycardia, falling blood pressure, dizziness and altered peripheral perfusion.
As a student nurse, recognise the deterioration, begin an appropriate ABCDE assessment within your competence and obtain prompt registered or emergency support according to local procedures.
Assessment errors to avoid
- Looking only at the amount of visible blood. Assess the patient's physiological condition too.
- Ignoring the observation trend. Pulse and blood pressure changes may be highly significant.
- Missing dizziness or weakness. Ask how the patient feels as well as what they have observed.
- Assuming one normal blood pressure is reassuring. Deterioration may evolve over time.
- Failing to recognise melaena. Very dark altered stool may represent gastrointestinal bleeding.
- Trying to determine the exact cause before escalating. Recognition and communication come first.
- Delaying help while completing documentation. Escalate significant deterioration promptly.
Report the bleeding and the physiological change
Example escalation
“I'm concerned about Mrs Green. She has passed a very dark stool and now feels dizzy and weak. Her pulse has increased from 80 to 116 and her blood pressure has fallen from her earlier reading. She also looks pale and clammy.”
This communicates the possible bleeding, symptoms, observation trend and visible deterioration.
Recognise → assess → communicate → escalate
Identify possible bleeding
Notice haematemesis, melaena, rectal bleeding or symptoms that may suggest blood loss.
Look for deterioration
Assess pulse, blood pressure, perfusion, breathing and consciousness within ABCDE.
Describe the pattern
Report the bleeding, symptoms, observations and changes from the patient's baseline.
Build your acute-assessment skills
Continue developing your ability to recognise deterioration, assess physiological change and communicate concerns clearly through the NurseNet Clinical Confidence pathway.
Explore Clinical Confidence →