Patients drink what is known as a contrast solution so doctors can view the patients digestive tract. The contrast solution shows abnormalities within a CT scan or MRI that can not normally be seen without contrast.
so they know if the patients digestive system is working properly
Doctors will ask their patients about their general health and if the patients have any abdominal pains . To investigate further, doctors may look with a camera through the colon of the patients.
the answer is unknown
patients
the people that doctors treat are called "Patients".
Doctors are very bad patients for many reasons. Doctors are used to doing the tests and solving the problems not sitting back just to listen.
so they can see their patients.
to care for there patients
at the hospital
Madical doctors are normal doctors they give madicines and injections
Doctors have to be calm because if they are not, the patients will think that their case is serious. The patients can pass out if the doctor helping them stresses.
To the best of my knowledge doctors use sedation on patients to make them sleep during an operation or a procedure. If patients were not sedated it would be very painful for them.