Table 2 Pulmonary embolism by Wells category and D-dimer category
From: Mandatory adherence to diagnostic protocol increases the yield of CTPA for pulmonary embolism
Pulmonary embolism | All patients (n = 249 CTPA scans) | |||||
|---|---|---|---|---|---|---|
- None | 175 (70.3 %) | |||||
- Proximal | 64 (25.7 %) | |||||
- Subsegmental | 10 (4 %) | |||||
Pulmonary embolism | Wells low | Wells high | ||||
n = 126 (50.6 %) | n = 123 (49.4 %) | |||||
- None | 96 (76.2 %) | 79 (64.2 %) | ||||
- Proximal | 27 (21.4 %) | 37 (30.1 %) | ||||
- Subsegmental | 3 (2.4 %) | 7 (5.7 %) | ||||
D-dimer low | D-dimer unknown | D-dimer high | D-dimer low | D-dimer unknown | D-dimer high | |
n = 7 (5.6 %) | n = 29 (23 %) | n = 90 (71.4 %) | n = 5 (4.1 %) | n = 61 (49.6 %) | n = 57 (46.3 %) | |
Pulmonary embolism | ||||||
- None | 7 (100 %) | 26 (89.7 %) | 63 (70 %) | 5 (100 %) | 40 (65.6 %) | 24 (59.6 %) |
- Proximal | - | 3 (10.3 %) | 24 (26.7 %) | - | 17 (27.9 %) | 20 (35.1 %) |
- Subsegmental | - | - | 3 (3.3 %) | - | 4 (6.6 %) | 3 (5.3 %) |