Table 2.
Fetal Intelligent Navigation Echocardiography: Success Rates of Obtaining 9 Fetal Echocardiographic Views After Applying Intelligent Navigation to 100 Normal STIC Volume Data Sets Using Diagnostic Planes and/or VIS‐Assistance
| Diagnostic Plane (n = 100) | VIS‐Assistance (n = 100) | Diagnostic Plane and/or VIS‐Assistance (n = 100) | ||||
|---|---|---|---|---|---|---|
| Fetal Echocardiographic View | n (%) | 95% CIa | n (%) | 95% CIa | n (%) | 95% CIa |
| 1. 4‐chamber | 97 (97) | 91–99 | 100 (100) | 96–100 | 100 (100) | 96–100 |
| 2. 5‐chamber | 99 (99) | 94–>99.9 | 100 (100) | 96–100 | 100 (100) | 96–100 |
| 3. LVOT | 99 (99) | 94–>99.9 | 100 (100) | 96–100 | 100 (100) | 96–100 |
| 4. Short axis view of great vessels/RVOT | 97 (97) | 91–99 | 100 (100) | 96–100 | 100 (100) | 96–100 |
| 5. 3VT | 99 (99) | 94–>99.9 | 100 (100) | 96–100 | 100 (100) | 96–100 |
| 6. Abdomen/stomach | 100 (100)b | 96–100 | 100 (100)c | 96–100 | 100 (100) | 96–100 |
| 7. Ductal arch | 95 (95) | 95–100 | 100 (100) | 96–100 | 100 (100) | 96–100 |
| 8. Aortic arch | 98 (98) | 95–100 | 100 (100) | 96–100 | 100 (100) | 96–100 |
| 9. SVC/IVC | 94 (94) | 95–100 | 100 (100) | 96–100 | 100 (100) | 96–100 |
| • SVC | 97 (97) | 91–99 | ||||
| • IVC | 97 (97) | 91–99 | ||||
CI indicates confidence interval; IVC, inferior vena cava; LVOT, left ventricular outflow tract; RVOT, right ventricular outflow tract; SVC, superior vena cava; and 3VT, 3 vessels and trachea.
The Wald method was used to calculate 2‐sided CIs for proportions expressed in the table; as the true proportion cannot exceed 100%, upper confidence limits are truncated at 100%.
Defined as visualization of the stomach in the diagnostic plane.
Defined as visualization of both the stomach and 4‐chamber view in VIS‐Assistance (to determine situs).