Hi,
I went to the archives today and had a look for the Admin and case books for Sarah Sansom but the case book I need to look at covers the years 1888-1913 which covers the years we need being 1891-1901 are closed until 2014 so I cannot access it. Also looked for Adminissions books but 1891-1893 and 1898-1906 are missing, had a look at the book for 1894-1897 and she wasn't admitted in those years so we need the case book. You could email the archives to see if they would look at the case book for you which I'm sure they would but may charge a fee.
However I died find a burial for Sarah Sansom, she died 12 March 1915 a spinster aged 61yrs at City Asylum (Borough Asylum) buried at Nottingham Church (Rock) Cemetery on 16 March 1915 in Family Grave 5907.
As its a family grave I had a look to see who else was in the Grave;
John Reason died 22 Aug 1904 at Nottingham General Hospital aged 56yrs of 348 Radford Rd, buried 25 Aug 1904 grave purchased by Hannah Reason widow (wife)
and Hannah Harris died 27 April 1917 aged 65yrs wife of Charels Harris a gardener of 348 Radford Rd buried 1 May 1917.
Hope this helps.