GE Logiq P5 User Manual
Have a look at the manual GE Logiq P5 User Manual online for free. It’s possible to download the document as PDF or print. UserManuals.tech offer 45 GE manuals and user’s guides for free. Share the user manual or guide on Facebook, Twitter or Google+.
LOGIQ 5 Basic User Manual 11-1 Direction 2300002-100 Rev. 2 Chapter 11 Vascular Describes how to perform Vascular measurements and calculations.
Vascular 11-2 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 Vascular Exam Preparation Introduction Measurements and calculations derived from ultrasound images are intended to supplement other clinical procedures available to the attending physician. The accuracy of measurements is not only determined by the system accuracy, but also by use of proper medical protocols by the user. When appropriate, be sure to note any protocols associated with a particular measurement or calculation. Formulas and databases used within the system software that are associated with specific investigators are so noted. Be sure to refer to the original article describing the investigators recommended clinical procedures. General Guidelines New Patient information must be entered before beginning an exam. See ‘Beginning a New Patient’ for more information. Any measurement can be repeated by selecting that measurement again from the Touch Panel Menu.
Vascular Measurements LOGIQ 5 Basic User Manual 11-3 Direction 2300002-100 Rev. 2 Vascular Measurements Introduction Vascular measurements offer several different types of measurement studies: Figure 11-1. Vascular Exam Category Touch Panel • Generic – Common to all applications. See ‘Generic Measurements’ for more information. • Carotid • LEA (Lower Extremity Artery) • LEV (Lower Extremity Vein) • TCD (Trans Cranial Doppler) • UEA (Upper Extremity Artery) • UEV (Upper Extremity Vein) • Renal
Vascular 11-4 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 Introduction (continued) To change an exam calc: 1. Select Exam Calcs. The Vascular exam category allows you to choose from the displayed exam calcs. 2. To select another exam calcs, press the desired exam calcs folder. A vascular study is a group of the particular vessels. You can customize the vessel exam calcs in the configuration menu. When you use Auto Vascular calculation, you use the vessel keys on the Touch Panel to post-assign vascular calculations. When you are not using Auto Vascular calculation, the vessel key is used for manual measurement.
Vascular Measurements LOGIQ 5 Basic User Manual 11-5 Direction 2300002-100 Rev. 2 B-Mode Measurements Figure 11-2. B-Mode Touch Panel NOTE: The following instructions assume that you first scan the patient and then press Freeze.
Vascular 11-6 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 %Stenosis You can calculate % Stenosis by diameter or by area. Diameter NOTE: When you use diameter to calculate the %stenosis, always take the measurement from a cross-sectional view of the vessel. To calculate percent stenosis by diameter: 1. From the Generic Touch Panel, select % Stenosis. 2. Select %sten(Diam). The system displays an active caliper. 3. Make a distance measurement of the inner area of the blood vessel. The system displays an active caliper for the second distance measurement. 4. Make a distance measurement of the outer area of the blood vessel. The system displays each distance measurement and the % Stenosis in the Results Window. For information about how to make a distance measurement, See ‘Distance measurement’ for more information. NOTE: For the diameter calculation, do NOT take a distance measurement from a longitudinal view. This may lead to an inaccurate assessment of % stenosis.
Vascular Measurements LOGIQ 5 Basic User Manual 11-7 Direction 2300002-100 Rev. 2 % Stenosis (continued) AreaTo calculate percent stenosis by area: 1. From the Generic Touch Panel, select % Stenosis. 2. Select %sten(Area). The system displays a trace caliper. 3. Make a trace measurement of the inner area of the blood vessel. NOTE: To erase an open trace, move the Trackball. The system displays a second trace caliper. 4. Make a trace measurement of the outer area of the blood vessel. The system displays the two area measurements and percent stenosis in the Results Window. See ‘Circumference and area (trace) measurement’ for more information.
Vascular 11-8 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 Vo l u m e The volume calculation can be made from any of the following measurements: • One distance • Two distances • Three distances • One ellipse • One distance and one ellipse For details on how to make a distance measurement, See ‘Distance measurement’ for more information. For details on how to make an ellipse measurement, See ‘Circumference and area (ellipse) measurement’ for more information. NOTE: IMPORTANT! If you want to make a volume calculation using one or two distances, you must select Volume BEFORE you make the measurements. To make a volume calculation using one or two distances: 1. Select Volume. 2. Make one or two distance measurements. 3. Select Volume. The system displays the distances and the volume in the Results Window. To make a volume calculation using three distances: 1. Make three distance measurements. NOTE: Three distances should be done in the dual format mode (side by side images). One measurement is usually made in the sagittal plane and two measurements in the axial plane. To use the dual format mode, press the L or R key on front panel. 2. Select Volume. The system displays the distances and the volume in the Results Window.
Vascular Measurements LOGIQ 5 Basic User Manual 11-9 Direction 2300002-100 Rev. 2 Volume (continued) To make a volume calculation using one ellipse: 1. Select Volume. 2. Make one ellipse measurement. 3. Select Volume. The system displays the ellipse measurement and the volume in the Results Window. To make a volume calculation using one ellipse and one distance: 1. Select Volume. 2. Make one distance measurement and one ellipse measurement. 3. Select Volume. The system displays the distance and ellipse measurement and the volume in the Results Window. Calculation formulas are available in the Advanced Reference Manual. HINTS• Volumes are most accurate when measurements are taken in the sagittal and axial scan planes. • To display sagittal and axial plane images simultaneously, use the side-by-side dual format option.
Vascular 11-10 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 Volume (continued) Figure 11-3. Volume Calculation Examples 1. One distance 2. Two distances 3. Three distances 4. One ellipse 5. One distance and one ellipseTable 11-1: Volume Calculations Calc NameInput Measurements Volume (spherical) One distance Volume (prolate spheroidal) Two distances, d1>d2 Volume (spheroidal) Three distances Volume (prolate spheroidal) One ellipse: (d1 major axis, d2 minor axis) Volume (spheroidal) One distance d1, and one ellipse (d2 major axis, d3 minor axis) 12 3 45