Rate of Nondiagnostic Computerized Tomography Pulmonary Angiograms (CTPAs) Performed for the Diagnosis of Pulmonary Embolism in Pregnant and Immediately Postpartum Patients

Table 1

Identification of nondiagnostic (ND) CTPA scans.

	Number of subjectively ND CTPAs	Number of objectively ND CTPAs	Frequency that subjectively ND scans correlated with objectively ND	Number of objectively ND CTPAs not identified by subjective identification	Number of subjectively ND scans not identified by objective definition
Pregnant/postpartum patients	27/83	36/83	24/36	12/36	3/83
	32.50%	43.40%	66.70%	33.30%	3.60%
Nonpregnant/postpartum patients	9/89	24/89	7/24	17/24	2/89
	10.1%	27.0%	29.2%	70.8%	2.2%