Brazilian surgeon operates on a patient 12,034 km away with 199 ms latency

aakashgupta · x · 2026-07-24

A Brazilian surgeon performed a teleoperation on a patient in Kuwait from 12,034 km away with an average latency of 199 ms.

The post explains why the result is notable: light alone needs about 120 ms for the round trip over the 24,000 km fiber loop, so the remaining budget for routers, switches, and encoding is tiny.
It also notes a human-factors threshold: below roughly 200 ms, the brain can still treat robot arms like its own hands; above 300 ms, surgeons start compensating consciously, and around 700 ms error rates become dangerous.
The record matters because the network was operating close to the theoretical latency floor imposed by physics.

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