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Resuscitation Point of Care Ultrasound / Ultrasound Basics / Modalities / M-mode

M-mode

Measurements and Assessments

  • M-Mode is Time Motion Display. This images the movement of structures over time.
  • Ice pick view through a 2D image
  • Single crystal sends and receives a signal, so no frame rate
  • Ideal for precise measurements of change over time
  • Tricuspid Annular Plane Systolic Excursion (TAPSE)
  • E-Point Septal Separation (EPSS)
  • Respiratory change in the Inferior Vena Cava (Delta IVC)

Imaging

  • Locate area of interest in 2D
  • Select M-mode to activate cursor
  • Place cursor on region to be measured (Video 1)
  • Select M-mode again to obtain image (Figure 1)
  • Freeze loop, scroll to find ideal point for measurement
  • Make measurement, and save image

Figures

Figure 1 - Measuering TAPSE with M-Mode

Videos

Video 1 - Placing Cursor at Area of Interest

References

Chan, Vincent, and Anahi Perlas. “Basics of ultrasound imaging.” Atlas of ultrasound-guided procedures in interventional pain management. Springer, New York, NY, 2011. 13-19.