The sudden desaturation, worked in order
By the end you can
- Run DOPE without skipping to the ventilator
- Decide when to disconnect and bag
- Confirm tube position with more than breath sounds
Patient first, machine second
When a ventilated patient desaturates acutely, disconnect and manually ventilate with 100% oxygen. That single act both treats the patient and splits the differential: if bagging is easy and the saturation recovers, the problem was the circuit or the settings; if bagging is hard, the problem is the patient or the tube.
DOPE keeps the order honest — Displacement, Obstruction, Pneumothorax, Equipment. Work it in that sequence because that is roughly the order of both frequency and speed of correction.
Confirmation is objective
Waveform capnography is the confirmation that holds up. Breath sounds can mislead in a noisy room and in a patient with a right mainstem intubation; a sudden loss of the capnogram with a hard-to-bag patient is a tube problem until proven otherwise.
Say it while you do it
- Disconnect, bag with 100%, note compliance under your hand
- Displacement: depth at the teeth, capnogram present
- Obstruction: pass a suction catheter
- Pneumothorax: unilateral sounds, tracheal shift, hypotension
- Equipment: circuit, valve, gas source
Where people lose the point
- Suctioning first out of reflex before assessing tube position
- Adjusting alarms instead of assessing the patient
- Accepting bilateral breath sounds as proof of correct depth