Starting a Transfusion: Rates and Monitoring

Early observation catches serious reactions, and the right rate and time limit prevent overload, bacterial growth and wasted units. Most severe acute reactions begin within the first 15 minutes or soon after, so the first 15 minutes demand direct observation by a staff member.

Safety preparation.

• Complete the bedside identity and compatibility check.

• Record baseline temperature, pulse, blood pressure, respiratory rate and oxygen saturation (within 60 minutes before starting).

• Confirm the patient is comfortable, has access to a call system, and has been told to report chest pain, breathlessness, rash, itch, rigors, back or loin pain, or anxiety.

• Avoid starting non-urgent transfusions at times when observation is limited (for example overnight), unless the clinical need is urgent.

Special groups.

• Patients at risk of overload (heart failure, renal failure, severe chronic anaemia, older age, neonates): slower rates and closer monitoring.

• Unconscious or sedated patients: they cannot report symptoms, so monitor more frequently.

• Children and neonates: weight based rates.

Equipment. Thermometer, blood pressure device, pulse oximeter, observation chart, timer, and ready access to emergency drugs (adrenaline, oxygen, intravenous fluid, hydrocortisone, chlorphenamine, bronchodilator), and a person trained to recognise a reaction.

Usual rates and time limits.

Starting and monitoring.

1. Start the transfusion at the initial slow rate and note the time.

2. Stay with the patient, or check at the bedside frequently, for the first 15 minutes.

3. At 15 minutes, record temperature, pulse, blood pressure, respiratory rate and oxygen saturation, and increase the rate if there is no problem.

4. Then record observations at least hourly, or as the hospital sets, and at each unit completion.

5. Record observations again at the end of the transfusion, and at about 1 hour after completion for the first unit.

When to stop. Stop the transfusion, assess the patient, keep intravenous access with 0.9% sodium chloride, recheck identification of patient and unit, and inform the blood bank and the clinician, when any of these occur:

• Temperature of 38 degrees Celsius or over, or a rise of 1 degree Celsius or more from baseline.

• Rigors, chest pain, back or loin pain, dyspnoea, wheeze, stridor, facial swelling or generalised urticaria.

• Fall in systolic blood pressure of 30 mmHg or more, or rise in heart rate of 30 beats a minute or more, with other symptoms.

• Fall in oxygen saturation of 3% or more, or new oxygen requirement.

• Agitation, sense of doom, haemoglobinuria or unexplained bleeding.

Mild reactions. Isolated mild urticaria or itch may be treated with an antihistamine, with the transfusion paused, reassessed and restarted only after authorised clinical review.

If the time limit will be exceeded. Do not continue beyond 4 hours from leaving storage. Stop the transfusion, discard the remaining product, and reassess whether another unit is needed.

Complications. Circulatory overload, acute reactions, bacterial infection from prolonged infusion, hypothermia and missed deterioration.

Documentation. Times of start and end, volume given, observations and any reaction, with the reasons for stopping if applicable.

Quality assurance. Audit completeness of the 15 minute observation, time to completion, units discarded for time limits, and overnight non-urgent transfusions. Train staff to recognise early signs.