Table 4

 Influence of investigations on diagnosis and patient management (n=6401). Percentages in parentheses

InvestigationNumber of investigationsNumber of investigations which influenced the diagnosisNumber of investigations which changed patient care in ERNumber of investigations which influenced the decision to admit or not
Full blood count3348261 (7.8)118 (3.5)226 (6.8)
BUN and creatinine550442 (0.8)16 (0.3)20 (0.4)
Electrolytes6829181 (2.7)178 (2.6)234 (3.4)
Liver function tests141330 (2.1)02 (0.1)
Cardiac enzymes90800178 (19.6)
Clotting studies927000
Cross match360028 (7.8)0
Blood glucose2880217 (7.5)102 (3.5)100 (3.5)
Amylase18978 (53.0)100 (53.0)65 (34.4)
Arterial blood gases29756 (18.8)142 (53.0)86 (29.0)
Total22 655865 (3.8)684 (3.0)911 (4.0)