The laser scalpel was an energy-based medical tool, used to create incisions.
Soon after, when the Cat had been impregnated with eight polymorphs, Kryten prepared to perform a C-section to remove them. However, Kryten could not use the laser scalpel properly, causing the beam to go everywhere and making the others duck for cover as the Science Room was wrecked. (Can of Worms. Series XI)