Within the cultish fervour of Apple’s annual developer conference and the unveiling of new MacBooks, iPads and a smart home speaker, the tech superpower announced a less euphorically received Apple Watch innovation that enables a third-party glucose sensor to constantly monitor levels.

With the addition of Bluetooth to its watch, Apple is allowing the DexCom medical device to provide a running blood sugar level check.

It may not have been met with the same amount of excitement as the announcement of the HomePod speaker system at the Apple Worldwide Developers Conference in the US overnight, but according to industry experts this development has wide-ranging  health-saving implications.

Apple’s Chief Executive Tim Cook took to the San Jose, California, stage in front of a crowd of 5300, with millions watching the live stream on Safari and Apple TV, and said the wearable technology had evolved to become a health and fitness enabler.

But interaction with medical devices takes the watch into a new stratosphere of design, overcoming the shortcomings of apps and heralding in new healthcare possibilities.

"This new Bluetooth API may seem like a small detail but with it Apple is laying the right technical foundation," Brandon Ballinger, founder of Cardiogram, a health tracking app for Apple Watch, told CNBC.

Previously healthcare sensors communicated only with apps on the iPhone.

"So data may have been lost if the phone was out of range," Ballinger said.

For medical conditions that require continuous monitoring, such as for heart rate, the development of watchbands containing sophisticated health sensors and interactivity with medical devices could be life saving.