I'm lucky enough never to have been in hospital myself, but FWIW:
I was recently on the jury in a coroner's inquest. A patient had died suddenly in his sleep in hospital. The solicitor whose agenda was to make the hospital look bad aimed to suggest that nurses should have been entering his room every 15 minutes to check his breathing, but all medical staff witnesses argued that sleep is too important to disrupt by entering the room during the night, unless absolutely necessary. They used a torch to shine on the patients chest through the window to check for breathing, and specified that they tried not to shine on them directly (watching a shadow on the wall is preferable).
I was recently on the jury in a coroner's inquest. A patient had died suddenly in his sleep in hospital. The solicitor whose agenda was to make the hospital look bad aimed to suggest that nurses should have been entering his room every 15 minutes to check his breathing, but all medical staff witnesses argued that sleep is too important to disrupt by entering the room during the night, unless absolutely necessary. They used a torch to shine on the patients chest through the window to check for breathing, and specified that they tried not to shine on them directly (watching a shadow on the wall is preferable).