This is terrible advice.
Nobody goes “routinely” multiple days without sleeping. The only way military is doing that if necessary is methamphetamine, see German troops during WW2.
After 24-48 hours there will be an onset of psychosis, after 48 hours without sleep most people experience psychosis, especially in combination with drugs.
30 hours aren’t multiple days. Nonetheless it is completely reckless for this to occur in the first place, endangering both patients and staff.
Even then, taking some sleep during the breaks is preferable over going without any sleep.