pinit_fg_en_rect_red_20 GEN - Anaesthetic Devices Vulnerable To Hackers
A patient having anaesthetic administered to themImage copyrightGetty Images
Image caption The problem affects anaesthetic machines used in many hospitals around the world

A type of anaesthetic machine that has been used in NHS hospitals can be hacked and controlled from afar if left accessible on a hospital computer network, a cyber-security company says.

A successful attacker would be able to change the amount of anaesthetic delivered to a patient, CyberMDX said.

Alarms designed to alert anaesthetists to any danger could also be silenced.

GE Healthcare, which makes the machines, said there was no "direct patient risk".

But CyberMDX's research suggested the Aespire and Aestiva 7100 and 7900 devices could be targeted by hackers if left accessible on hospital computer networks.