![Daniels (Crewman), dying](https://cdn.statically.io/img/static.wikia.nocookie.net/memoryalpha/images/b/b2/Daniels_%28Crewman%29%2C_dying.jpg/revision/latest/scale-to-width-down/180?cb=20041122043238&path-prefix=en)
Daniels using a cannula
![Mercy hospital elderly patient](https://cdn.statically.io/img/static.wikia.nocookie.net/memoryalpha/images/4/4c/Mercy_hospital_elderly_patient.jpg/revision/latest/scale-to-width-down/180?cb=20141217202554&path-prefix=en)
An elderly woman using a cannula
A cannula was a length of flexible tubing that provided life-sustaining substances to patients.
In 1944, Crewman Daniels wore a cannula while dying. (ENT: "Storm Front, Part II")
In 1986, a kidney patient at Mercy Hospital had a nasal cannula. (Star Trek IV: The Voyage Home)
In 2153, a comatose Trip Tucker wore a cannula in Enterprise NX-01's sickbay. (ENT: "Similitude")