B40/B20 Patient Monitor
18-2
Overview
Entropy is a non-invasive parameter suitable for adults and pediatric patient population older
than two years of age.
Entropy may be used as an aid in monitoring the effects of certain anesthetic agents on the
patient’s central nervous system (CNS) during general anesthesia. Displaying and using clinical
information from Response Entropy (RE) and State Entropy (SE) may allow the clinician to tailor
the anesthetic according to the individual needs of a patient.
The use of Entropy parameters may help the clinician to improve drug management. It may
also enable a faster recovery from anesthesia and a more predictable wake-up and
extubation.
Prior to using Entropy as an adjunct to guide anesthesia care, it is recommended to review
important situations and limitations that can influence the Entropy number. GE recommends
that clinicians review the following practice advisory that includes a section on brain function
monitoring: The American Society of Anesthesiologists, Practice Advisory for Intraoperative
Awareness and Brain Function Monitoring (Anesthesiology 2006; 104: 847-64). Clinicians are
also recommended to maintain current knowledge of government regulatory, practice or
research information on brain function monitoring and related topics.
Entropy is for monitoring the state of CNS by data acquisition of electroencephalograph (EEG)
and frontal electromyograph (FEMG) signals. The spectral entropies, Response Entropy (RE) and
State Entropy (SE), are processed EEG and FEMG variables. The Entropy measurement is to be
used as an adjunct to other physiological parameters.
Response Entropy (RE) and State Entropy (SE) may be used as an aid in monitoring the effects of
certain anesthetic agents, which may help the user titrate anesthetic drugs according to the
individual needs of patients. Furthermore, the use of Entropy parameters may be associated
with a reduction of anesthetic use and faster emergence from anesthesia.
The Entropy module and accessories are indicated for use by qualified medical personnel only.
Figure 18-1 Entropy measurement connector
Entropy
connector
Summary of Contents for B20
Page 2: ......
Page 16: ...B40 B20 Patient Monitor xii ...
Page 17: ...1 Introduction ...
Page 18: ......
Page 27: ...2 System description ...
Page 28: ......
Page 58: ...B40 B20 Patient Monitor 2 30 ...
Page 59: ...3 Installation ...
Page 60: ......
Page 69: ...4 Monitoring basic ...
Page 70: ......
Page 79: ...5 Alarms ...
Page 80: ......
Page 102: ...B40 B20 Patient Monitor 5 22 ...
Page 103: ...6 Monitor setup ...
Page 104: ......
Page 123: ...7 Trends ...
Page 124: ......
Page 140: ...B40 B20 Patient Monitor 7 16 ...
Page 141: ...8 Print and record ...
Page 142: ......
Page 153: ...9 Cleaning and care ...
Page 154: ......
Page 163: ...10 Troubleshooting ...
Page 164: ......
Page 181: ...11 ECG ...
Page 182: ......
Page 205: ...12 Impedance respiration ...
Page 206: ......
Page 215: ...13 Pulse oximetry ...
Page 216: ......
Page 232: ...B40 B20 Patient Monitor 13 16 ...
Page 233: ...14 Non invasive blood pressure ...
Page 234: ......
Page 248: ...B40 B20 Patient Monitor 14 14 ...
Page 249: ...15 Invasive blood pressure ...
Page 250: ......
Page 261: ...16 Temperature ...
Page 262: ......
Page 267: ...17 Airway gas ...
Page 268: ......
Page 293: ...18 Entropy ...
Page 294: ......
Page 316: ...Abbreviations A 12 ...
Page 318: ...B40 B20 Patient Monitor B 2 ...
Page 319: ......