People in North Yorkshire are being urged to donate blood after an amber alert was issued, with health professionals saying that the shortage is 'critical'.

Yorkshire Air Ambulance (YAA) is urging people in the region to donate blood in response to a national blood shortage. 

The shortage has been exacerbated by a recent cyber-attack on a London hospital and unfilled appointments at donor centres, particularly affecting O-type blood stocks.

The NHS urgently needs donations from O-negative and O-positive donors, as these blood types are crucial for emergency medical services.

O negative blood, known as the universal donor type, is especially crucial as it can be safely given to any patient, regardless of their blood type.

Due to the short shelf life of blood, which is only 35 days, maintaining a steady supply is essential throughout the year.

 Paul Holmes, operations manager of the Yorkshire Air AmbulancePaul Holmes, operations manager of the Yorkshire Air Ambulance (Image: YAA)

Yorkshire Air Ambulance operations manager, Paul Holmes, highlighted the severity of the situation, he said, "The shortage of O-type blood is critical. As a service that provides lifesaving emergency care, we rely heavily on blood supplies to perform roadside transfusions for patients facing life-threatening injuries.

"Without adequate blood supplies, particularly O negative, which is universally compatible, our ability to carry blood on board could be compromised, jeopardising patient outcomes."

Since the introduction of blood on board in 2017, YAA has been able to provide on-scene blood and plasma transfusions, significantly enhancing the care provided to patients in critical condition.


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Between January and August 2024, YAA has attended 808 patients, with 22 receiving crucial blood transfusions at the scene of an emergency.

While this represents a small percentage (three per cent) of all patients treated, it emphasises the importance of having blood readily available for those in dire need.

The recipients included 14 males and eight females, ranging in age from 18 to over 75 years old.

The most common incidents requiring blood transfusions were road traffic accidents and other trauma-related incidents, such as assaults and falls.

Yorkshire Air Ambulance’s blood is supplied by the Mid Yorkshire Hospitals NHS Trust and delivered by the Supplies Department from Yorkshire Ambulance Service, using Credo Cube cool storage boxes to maintain the blood within a safe temperature range for up to 48 hours.

If the blood is not used, it is returned to Pinderfields Hospital to be used during surgery and other essential procedures in the hospital.

Mr Holmes added: "Every donation has the potential to save a life. We strongly urge eligible donors to book appointments at their nearest donor centres immediately—your donation could indeed be the difference between life and death for someone in need."