GE Logiq P5 User Manual
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OB Measurements and Calculations LOGIQ 5 Basic User Manual 9-45 Direction 2300002-100 Rev. 2 Heart Rate To calculate the heart rate: 1. From the Generic Touch Panel, select Heart Rate. The system displays an active caliper. 2. To position the caliper at a recognizable point in the first cycle, move the Trackball. 3. To fix the first caliper, press Set. The system displays a second active caliper. 4. To position the caliper at the identical point in the second or third cycle, move the Trackball. Figure 9-4. Two Heart Beat Reference 5. To complete the measurement and transfer the calculation to the worksheet, press Set. NOTE: For information about how to specify the number of heart beats that the system will use, see the Basic User Manual, General Measurements and Calculation.
OB/GYN 9-46 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 Doppler Mode Measurements You can use Doppler mode to study fetal blood flow in the heart, umbilical cord, placenta, and middle cerebral arteries. OB/GYN Doppler mode also allows you to study uterine and ovarian blood flow. The OB/GYN vessel study includes the following vessels: • Aorta • Desc. Aorta • Middle Cerebral Artery (MCA) (right and left) • Ovarian (right and left) • Placenta • Umbilical • Uterine (right and left) For each of these studies, you can make any of the following measurements: • Peak Systole (PS) • End Diastole (ED) • Mid Diastole (MD) • Heart Rate • TAMAX • Pulsatility Index (PI) • Resistive Index (RI) • PS/ED Ratio • ED/PS Ratio • Acceleration • AT • TAMEAN • Volume Flow • PV
OB Measurements and Calculations LOGIQ 5 Basic User Manual 9-47 Direction 2300002-100 Rev. 2 To select OB/GYN vessel measurements OB/GYN Vessel measurements use the auto sequence feature. With this feature, when you select a folder for the vessel you want to measure, the system automatically starts the first measurement. It then continues with each of the other measurements in that study. 1. Select the folder for the vessel you want to measure. The system shows all the measurements for that vessel. The caliper for the first measurement is automatically displayed. 2. Make the measurement. After you complete each measurement, the system starts the next measurement. After the last measurement is complete, the system returns to the OB/GYN Vessel Touch Panel. Your system is set up to show the measurements that you usually make for each vessel. To make a measurement that is not shown for the selected vessel: 1. Select the folder for the vessel you want to measure. 2. Select Show All. The system display all possible vessel measurements. 3. Select the desired measurement. The following pages describe the steps to make each specific measurement in the OB/GYN Vessel study.
OB/GYN 9-48 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 Acceleration 1. Select Accel. The system displays an active caliper with vertical and horizontal dotted lines. 2. To position the caliper at the onset of systole, move the Trackball. 3. To fix the measure point, press Set. The system displays a second active caliper. 4. To position the second caliper at early systolic peak, move the Trackball. 5. To complete the measurement, press Set. The system displays the acceleration time and acceleration in the Results Window. Acceleration Time (AT) 1. Select AT. The system displays an active caliper and a vertical dotted line. 2. To position the caliper at the start point, move the Trackball. 3. To fix the first caliper, press Set. The system displays a second active caliper. 4. To position the caliper at the end point, move the Trackball. 5. To complete the measurement, press Set. The system displays the acceleration time in the Results Window.
OB Measurements and Calculations LOGIQ 5 Basic User Manual 9-49 Direction 2300002-100 Rev. 2 Heart Rate This measurement is available in the Fetal Heart study and the OB/GYN Vessel study. To calculate the heart rate: 1. Select Heart Rate. The system displays an active caliper and a vertical dotted line. 2. To position the caliper at a recognizable point in the first cycle, move the Trackball. 3. To fix the first caliper, press Set. The system displays a second active caliper. 4. To position the caliper at the identical point in the second or third cycle, move the Trackball. Figure 9-5. Two Heart Beat Reference 5. To complete the measurement and transfer the calculation to the worksheet, press Set.
OB/GYN 9-50 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 Peak Systole (PS), End Diastole (ED), or Mid Diastole (MD) To calculate the peak systole, end diastole, or mid diastole: 1. Select PS, ED, or MD. The system displays an active caliper with vertical and horizontal dotted lines. 2. To position the caliper at the measurement point, move the Trackball. 3. To complete the measurement, press Set. The system displays the peak systole, end diastole, or mid diastole in the Results Window. Pulsatility Index (PI) 1. Select PI. The system displays a trace caliper and a vertical dotted line. 2. To position the caliper at the beginning of the waveform (PS), move the Trackball. 3. To fix the start point, press Set. The system displays a second active caliper. 4. To trace the waveform from PS to ED, move the Trackball. 5. To complete the measurement, press Set. The system displays peak systole, mid diastole, end diastole, TAMAX, and the PI in the Results Window.
OB Measurements and Calculations LOGIQ 5 Basic User Manual 9-51 Direction 2300002-100 Rev. 2 PS/ED or ED/PS Ratio To calculate the Peak Systole/End Diastole ratio or End Diastole/Peak Systole ratio: 1. Select PS/ED or ED/PS. The system displays an active caliper with vertical and horizontal dotted lines. 2. To position the caliper at peak systole (PS) or end diastole (ED), move the Trackball. 3. To fix the measure point, press Set. The system displays a second active caliper. 4. To position the second caliper at end diastole (ED) or peak systole (PS), move the Trackball. 5. To complete the measurement, press Set. The system displays the peak systole, end diastole, and PS/ ED or ED/PS ratio in the Results Window. Resistive Index (RI) 1. Select RI. The system displays an active caliper with vertical and horizontal dotted lines. 2. To position the caliper at the peak systolic velocity, move the Trackball. 3. To fix the measure point, press Set. The system displays a second active caliper. 4. To position the second caliper at the end diastolic velocity, move the Trackball. 5. To complete the measurement, press Set. The system displays PS, ED, and RI in the Results Window.
OB/GYN 9-52 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 TA M A X 1. Select TA M A X. The system displays a trace caliper and a vertical dotted line. 2. To position the caliper, move the Trackball. 3. To fix the start point, press Set. The system displays a second active caliper. 4. To trace the waveform, move the Trackball. 5. To complete the measurement, press Set. The system displays VTI, Time, and TAMAX in the Results Window.
OB Measurements and Calculations LOGIQ 5 Basic User Manual 9-53 Direction 2300002-100 Rev. 2 OB Worksheet The OB Worksheet lists patient information, and all measurement and calculation data. To view the OB Worksheet: 1. Press Measure. 2. Select Worksheet Display. Figure 9-6. OB Worksheet The OB Worksheet has three sections of information: 1. Patient data 2. Measurement information 3. Calculation information 2 3 1
OB/GYN 9-54 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 Patient data The Patient data section, at the top of the worksheet, lists information from the Patient Data Entry screen. You can select the following fields: • FetusNo – if this is a multi-gestational patient, you can select the fetus in this field. You can also adjust the Fetus knob to select the fetus. • CUA/AUA – select the ultrasound age calculation method • Composite Ultrasound Age (CUA) – regression calculation • Average Ultrasound Age (AUA) – an arithmetic average You can select the method in this field, or adjust the Select CUA/AUA knob. You can enter information in the following fields: • FetusPos – type information about the fetus position. • PLAC – type information about the placenta.