Patient puts on 3-d glasses during brain surgery

PARIS: In a world first, a patient in France undergoing brain surgery while conscious wore virtual reality glasses as doctors removed a cancerous tumour, the chief surgeon said.

“In creating a completely artificial world for the patient, we could map certain zones and connections of his brain related to functions that we could not, up to now, easily test on the operating table,” Philippe Menei, a neurosurgeon at Angers hospital in western France, said.

The operation was performed on Jan 27, and the patient was recovering well, he said.

Taking a scalpel to the brain while a patient is conscious has been a common practice for more than a decade.

Doing so allows doctors to determine, during an operation, whether and how vital functions such as speech, vision and movement are affected.

Patients cannot feel the probing of their brain tissue, and do not experience pain.

But using three-dimensional, virtual reality opens up a whole new range of possibilities, Menei said.

“By totally controlling what the patient sees and hears, we can put him in situations that allow us to do tests on certain (neural) connections that were not possible before,” he said.

In this case, it was crucial to protect the patient’s vision because he had already lost sight in one eye due to an illness.

During the operation, the medical team created a neutral virtual environment with no single point of focus.

“In this empty void, we could control the space and make luminous objects appear in the patient’s peripheral vision,” Menei said.

Three weeks after the operation, the patient’s vision was intact despite the removal of an aggressive tumour in a region controlling sight.

Menei said the patient was now preparing to undergo chemotherapy. — AFP