Observation:Prid:Pt:Pericard fld:Nom:Gram stain
observation:prid:pt:pericard fld:nom:gram stain
Observation:Presence or Identity:To identify measures at a point in time:Pericardial fluid:Nominal:Gram stain
observation:presence or identity:to identify measures at a point in time:pericardial fluid:nominal:gram stain