Canadian PELoading...Susp DVTNo0Yes+3Alt Dx UnlikelyNo0Yes+3HR >100 bpmNo0Yes+1.5Im/Srg last 4wkNo0Yes+1.5Prev DVT/PENo0Yes+1.5HemoptysisNo0Yes+1MaligOther0Rx <6 mo/Pall+1适用指征洞见与注意事项