The scans requests and reports of 146 patients who had CTPA were reviewed. This was compared to the previous audit results of 93 patients (results of each audit on Figures 1, 2, 3).

132/146 (90.4%) patients had a Well’s score documented, compared to 27/93 (29%) patients in the previous audit. 102/146 (69.9%) patients had a D-dimer performed and documented, in comparison to the 78/93 (83.8%) patients in the previous audit. 6/54 (11.1%) patients who had a Well’s score of 4 and below, did not have a D-dimer performed. From the 6 patients in whom PE was unlikely and who had no D-dimer performed, 2 patients (33.3%) had a positive CTPA.

9/146 (6.2%) patients had neither Well’s score nor D-dimer documented in the orders, compared to 35/93 (37.6%) patients in the previous audit. None of the 9/146 patients in the current audit had PE detected on CTPA.

20/146 (13.7%) patients had PE detected on CTPA. 16/93 (17.2%) patients in the previous audit had a positive scan in comparison.

83/116 (71.6%) patients who had negative scans, had alternative diagnoses, in comparison to 36/77 (46.8%) patients on the previous audit.