Masimo MightySat Manuel De L'utilisateur page 5

than during shorter averaging times. However, longer averaging times delay the response of the oximeter and reduce the
measured variations of SpO
Functional Oxygen Saturation (SpO
The MightySat Rx is calibrated to measure and display functional oxygen saturation (SpO
expressed as a percentage of the hemoglobin that is available to transport oxygen.
Note that dyshemoglobins are not capable of transporting oxygen, but are recognized as oxygenated hemoglobins by con-
ventional pulse oximetry.
General Description for Perfusion Index (PI)
The Perfusion Index (PI) is the ratio of the pulsatile blood flow to the non-pulsatile or static blood in peripheral tissue. PI thus
represents a noninvasive measure of peripheral perfusion that can be and noninvasively obtained from a pulse oximeter.
General Description for Pulse Rate (PR)
Pulse rate (PR), measured in beats per minute (BPM) is based on the optical detection of peripheral flow pulse.
General Description for Pleth Variability Index (PVI)
The Pleth Variability Index (PVI) is a measure of the dynamic changes in the perfusion index (PI) that occur during the respi-
ratory cycle. The calculation is accomplished by measuring changes in PI over a time interval where one or more complete
respiratory cycles have occurred. PVI is displayed as a percentage (0-100%).
Pleth Variability Index (PVI) may show changes that reflect physiologic factors such as vascular tone, circulating blood volume,
and intrathoracic pressure excursions.
The utility of PVI has been evaluated in clinical studies [1-11]. Technical and clinical factors that may affect PVI include probe
malposition, probe site, patient motion, skin incision, spontaneous breathing activity, lung compliance, open pericardium,
use of vasopressors or vasodilators, low perfusion index, subject age, arrhythmias, left or right heart failure, and tidal volume
[12-14].
Citations for Pleth Variability Index (PVI)
1. Cannesson M., Desebbe O., Rosamel P., Delannoy B., Robin J., Bastien O., Lehot J.J. Pleth Variability Index to Monitor the Respiratory Variations in the Pulse Oximeter
Plethysmographic Waveform Amplitude and Predict Fluid Responsiveness in the Operating Theatre. Br J Anaesth. 2008 Aug;101(2):200-6.
2. Forget P, Lois F, de Kock M. Goal-Directed Fluid Management Based on the Pulse Oximeter-Derived Pleth Variability Index Reduces Lactate Levels and Improves Fluid
Management. Anesth Analg. 2010 Oct;111(4):910-4.
3. Zimmermann M., Feibicke T., Keyl C., Prasser C., Moritz S., Graf B.M., Wiesenack C. Accuracy of Stroke Volume Variation Compared with Pleth Variability Index to Predict Fluid
Responsiveness in Mechanically Ventilated Patients Undergoing Major Surgery. Eur J Anaesthesiol. 2010 Jun;27(6):555-61.
4. Desebbe O, Boucau C, Farhat F, Bastien O, Lehot JJ, Cannesson M. Anesth Analg. The Ability of Pleth Variability Index to Predict the Hemodynamic Effects of Positive End-
Expiratory Pressure in Mechanically Ventilated Patients under General Anesthesia. 2010 Mar 1;110(3):792-8.
5. Tsuchiya M., Yamada T., Asada A. Pleth Variability Index Predicts Hypotension During Anesthesia Induction. Acta Anesthesiol Scand. 2010 May;54(5):596-602.
6. Loupec T., Nanadoumgar H., Frasca D., Petitpas F., Laksiri L., Baudouin D., Debaene B., Dahyot-Fizelier C., Mimoz O. Pleth Variability Index Predicts Fluid Responsiveness in
Critically Ill Patients. Crit Care Med. 2011 Feb;39(2):294-9.
7. Fu Q., Mi W.D., Zhang H. Stroke Volume Variation and Pleth Variability Index to Predict Fluid Responsiveness during Resection of Primary Retroperitoneal Tumors in Hans
Chinese. Biosci Trends. 2012 Feb;6(1):38-43.
8. Haas S., Trepte C., Hinteregger M., Fahje R., Sill B., Herich L., Reuter D.A. J. Prediction of Volume Responsiveness using Pleth Variability Index in Patients Undergoing Cardiac
Surgery after Cardiopulmonary Bypass. Anesth. 2012 Oct;26(5):696-701.
9. Byon H.J., Lim C.W., Lee J.H., Park Y. H., Kim H.S., Kim C.S., Kim J.T. Br. J. Prediction of fluid Responsiveness in Mechanically Ventilated Children Undergoing Neurosurgery.
Anaesth 2013 Apr;110(4):586-91.
10. Feissel M., Kalakhy R., Banwarth P., Badie J., Pavon A., Faller J.P., Quenot JP. Plethysmographic Variation Index Predicts Fluid Responsiveness in Ventilated Patients in the Early
Phase of Septic Shock in the Emergency Department: A Pilot Study. J Crit Care. 2013 Oct;28(5):634-9.
11. Yu Y., Dong J., Xu Z., Shen H., Zheng J. Pleth Variability Index-Directed Fluid Management in Abdominal Surgery under Combined General and Epidural Anesthesia. J Clin
Monit Comput. 2014 Feb 21.
12. Desgranges F.P., Desebbe O., Ghazouani A., Gilbert K., Keller G., Chiari P., Robin J.,Bastien O., Lehot J.J., Cannesson M. Br. J. Anaesth 2011 Sep;107(3):329-35.
13. Cannesson M. Arterial pressure variation and goal-directed fluid therapy. J Cardiothorac Vasc Anesth. 2010 Jun;24(3):487-97.
14. Takeyama M, Matsunaga A, Kakihana Y, Masuda M, Kuniyoshi T, Kanmura Y. Impact of Skin Incision on the Pleth Variability Index. J Clin Monit Comput 2011 Aug;25(4):215-21.
GETTING STARTED WITH MIGHTYSAT RX
MightySat Rx Features
ID DESCRIPTION
1 Enclosure Clip
Bluetooth Indicator
2
(Optional)
Battery Status
3
Indicator
4 Display Screen
Waveform and SIQ or
5
Pulse Bar
6 Touchpad
and pulse rate.
2
)
2
FUNCTION
Clip provided for ease of lanyard attachment.
Indicates when Bluetooth LE is enabled on the device.
Indicates the remaining relative life of the battery.
Display for measurements and indicators.
Note: Numbers will dim when confidence in the value
is low.
When the waveform option is turned on, the pleth
waveform and the SIQ provides an indicator of the
relative signal strength.
When the waveform option is turned off, the pulse
bar provides a blinking graphical indicator which
corresponds to the pulse rate. Additionally, the relative
signal strength is depicted by the height of the pulse
bar.
User interface to allow for change of settings (see Using
the Touchpad section in this manual).
5
): the amount of oxyhemoglobin
2
8981C-eIFU-0620