AAST Technologist Fundamentals. Workshop. Date: May 7, 2017 Focus Conference Location: Orlando, Florida Measurement

Transcription

1 AAST Technologist Fundamentals Date: May 7, 2017 Focus Conference Location: Orlando, Florida Workshop Measurement

2 X Conflict of Interest Disclosures Speaker: 1. I do not have any potential conflicts of interest to disclose, OR 2. I wish to disclose the following potential conflicts of interest Type of Potential Conflict Details of Potential Conflict Grant/Research Support Consultant Speakers Bureaus Financial support Other 3. The material presented in this lecture has no relationship with any of these potential conflicts, OR 4. This talk presents material that is related to one or more of these potential conflicts, and the following objective references are provided as support for this lecture:

3 Percentage Applications in Sleep Reporting: 83% Sleep Efficiency Reporting: 8% Stage N1 Measurement: Scoring: 50% of an epoch

4 Don't worry. You can figure tips, right? 10% of $35.00 =? 10% of $35.00 = $3.50 and 20% of $35.00 = (2 x $3.50) $7.00

5 Figuring percentages If Nasion Inion measurement is 30 cm. 50% = 15 cm 10% = (of 30.0) = 3.0 cm 20% = 3.0 x 2 = 6.0 cm

6 Figuring percentages If Fp1 to O1 is 24 cm. 50% =? 25% =?

7 Figuring percentages If Fp1 to O1 is 24 cm. 50% = 12 25% = 6

8 Figuring percentages If circumference is 60 cm. 50% =? 10% =? 5% =?

9 Figuring percentages If circumference is 60 cm. 50% = 30 cm 10% = 6 cm 5% = 3 cm

10 Figuring percentages If circumference is 58 cm. 50% = 29 cm 10% = 5.8 cm 5% = 2.9 cm

11 Make your own cheat sheet or... Distance 10% 20% 50% 28 cm cm cm

12 Standard Electrode Placements All even numbers are on the right. All odd numbers are on the left. Z's are along the midline.

13 Standard Electrode Placements Letters correspond to underlying brain structure.

14 Frontal Parietal

15 Central Occipital Temporal

16 Measuring the Head Where do we start? Landmarks Nasion Inion Pre-auricular points

17 Measuring the Head Landmarks

18 Pre-auricular point - a point of the posterior root of the zygomatic arch lying immediately in front of the upper end of the tragus *

19 Electrode locations: each location is an intersection of 2 lines of measurement

20 Measuring for PSG EEG - Step 1 Measure the distance along the midline between the nasion and inion. (e.g.: 30 cm) Mark 50% of this distance (15 cm)along the midline Determine 10% of the distance (3 cm), and mark posterior from the nasion along the midline. Determine 20% of the distance (6 cm) and mark this distance from the previous mark. Continue marking at 20% three more times along the midline. The final mark should be 10% above the inion.

21 Measuring for PSG EEG - Step 2 Measure the distance between the left and right preauricular points. (e.g.: 35 cm) Mark 50% of this distance (17.5 cm) along the midline. This is the second mark for CZ. Measure up 10% (3.5 cm) from the right preauricular point and mark for T4. Continue up another 20% (7cm or 3.5cm + 7cm = 10.5cm from preauricular point) Repeat for the left side of the head.

22 Per our 35 cm PAP-PAP example Each 10% space would be 3.5 cm and each 20% space would be 7.0cm.

23 Measuring for PSG EEG - Step 3a Make a vertical mark straight up from the midline of the nose through the horizontal 10% up line so you have a cross on the forehead (Fp). Measure the circumference of the head, (e.g. 60 cm) beginning with the midpoint of Fp and passing the tape through the horizontal 10% up marks. (T3, Oz, T4)

24 Measuring for PSG EEG - Step 3b Now you will have a series of crosses around the head. That O1 and O2 are 10% apart. Mark 5% of the circumference (3 cm) on either side of the frontal midpoint and make a vertical mark. Beginning with FP1 and continuing posterior along the midtemporal plane, mark at 10% intervals (6 cm) to identify F7, T3, T5, and O1. Keeping the tape in the horizontal plane of the 10% up from the landmarks, make horizontal lines for Fp1, F7, T3, T5, & O1. Repeat for the right side to find Fp2, F8, T4, T6, & O2.

25 Per our 60 cm circumference example Each 5% space would be 3.0 cm and each 10% space would be 6.0cm.

26 Measuring for PSG EEG - Step 4 Measure the distance between Fp1 and O1, passing through C3, (e.g. 24 cm) Mark at the midpoint to complete C3. (12 cm) Mark 25% of this distance (6 cm) posterior from Fp1 is marked for F3, 25% from F3 should be C3, 25% from C3 is marked for P3 and 25% from P3 should be O1. Repeat on the right side of the head for F4, C4, and P4

27 Measuring for PSG EEG - Step 5 Measure the distance from F7 to F8, passing through Fz. (e.g: 24 cm) Mark at midpoint to complete Fz 25 % (6 cm) of the distance from F7 is marked for F3, 25% from F3 is Fz, 25% from Fz is marked for F4. (F4 should be 25% from F8)

28 Measuring for PSG EEG - Step 6 Measure the distance from T5 to T6, passing through Pz. (e.g: 24 cm) Mark at midpoint to complete Pz 25 % (6 cm) of the distance from T5 is marked for P3, 25% from P3 is Pz, 25% from Pz is marked for P4. (P4 should be 25% from T6)

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