- Entropy Monitoring Allowed Lower Sevoflurane Concentration and Shorter Recovery Time in Sevoflurane Anesthesia
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Kang HS, Shin SW, Kim TK, Kim CH, Kwon JY
- KMID: 2039619
- Korean J Anesthesiol.
- 2007 Sep;53(3):298-303.
- doi: 10.4097/kjae.2007.53.3.298
BACKGROUND: Monitoring of anesthetic depth is important for successful general anesthesia, yet no such a monitor is widespread. Recently, anesthesia-monitoring device based on time-frequency balanced spectral entropy of electroencephalogram monitoring... -
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- A comparison of state and response entropy versus the bispectral index values during cesarean section
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Kwon JS, Kim DY, Chung RK, Kim CH, Lee HS
- KMID: 1970962
- Anesth Pain Med.
- 2009 Apr;4(2):156-160.
BACKGROUND: This study was designed to compare the measured values between the measured EEG-entropy and BIS monitor values during general anesthesia for cesarean section. METHODS: Fourteen patients who were to undergo... -
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- Comparison of the Measured Values between EEG-entropy and BIS during General Anesthesia and Sedation
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Choi JW, Kim JB, Jung HJ, Hwang MY, Kim DW
- KMID: 2092081
- Korean J Anesthesiol.
- 2006 May;50(5):501-505.
- doi: 10.4097/kjae.2006.50.5.501
BACKGROUND: The bispectral index (BIS) has been used as a monitor measuring hypnotic level of anesthesia or sedation. Recently EEG-entropy (M-Entropy(TM), S/5(TM) Entropy Module) has been provided and started to... -
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- Effect of remifentanil on consumption of sevoflurane in entropy monitored general anesthesia
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Kim HT, Heo HE, Kwon YE, Lee MJ
- KMID: 1766442
- Korean J Anesthesiol.
- 2010 Oct;59(4):238-243.
- doi: 10.4097/kjae.2010.59.4.238
BACKGROUND: Monitoring of anesthetic depth is important for successful general anesthesia. It is well known that entropy or BIS monitoring assisted titration of anesthetic drugs decreases their consumption. This study... -
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- A comparison of bispectral index and spectral entropy during sevoflurane anesthesia in children
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Choi SR, Chung CJ, Park SW, Lee SI
- KMID: 1970966
- Anesth Pain Med.
- 2009 Apr;4(2):174-178.
BACKGROUND: Bispectral index (BIS) is a useful tool to assess depth of anesthesia. Recently, spectral entropy has been promoted as a monitor of anesthetic depth in adult, but its characteristics... -
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- The effect of spectral entropy monitoring on propofol use and recovery in children
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Lee JY, Choi SR, Chung CJ, Lee JH, Park JH, Baik CY
- KMID: 1797477
- Anesth Pain Med.
- 2014 Apr;9(2):138-143.
BACKGROUND: The evaluation of anesthetic depth using electroencephalography showed reduction in recovery time from anesthesia and decrease in the amount of anesthesia used. This research compared the dosage of propofol... -
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- The Effect of Nitrous Oxide on Cerebral Entropy during Isoflurane Inhalational Anesthesia
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Park KS, Park JC, Moon BK, Lee SY, Kim JS, No HJ
- KMID: 2239872
- Korean J Anesthesiol.
- 2007 May;52(5):543-549.
- doi: 10.4097/kjae.2007.52.5.543
BACKGROUND: The bispectral index has limitations in describing the exact depth of anesthesia during nitrous oxide inhalation. This study examined the effect of nitrous oxide on the cerebral entropy measured... -
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- Effect of muscle relaxant on entropy during propofol anesthesia
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Kim BS, Lee SI, Choi SU, Shin HW, Lim HJ, Lee HW, Chang SH, Yoon SM
- KMID: 2236522
- Korean J Anesthesiol.
- 2009 Apr;56(4):381-386.
- doi: 10.4097/kjae.2009.56.4.381
BACKGROUND: The purpose of this study was to investigate whether muscle relaxant affect the values of Entropy, response entropy (RE) or state entropy (SE) during propofol anesthesia. METHODS: Eighty patients... -
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- Entropy Responses to Endotracheal Intubation during Anesthetic Induction Using Thiopental or Propofol and Succinylcholine
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Baek CW, Ko NY, Gwak MJ, Park JW, Jung YH, Woo YC, Kim JY, Koo GH, Park SG
- KMID: 1936726
- Korean J Anesthesiol.
- 2006 Mar;50(3):272-277.
- doi: 10.4097/kjae.2006.50.3.272
BACKGROUND: Thiopental and propofol are commonly used intravenous induction agents and entropy is a new method of assessing depth of anesthesia. In this study we evaluated the entropy responses to... -
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- Correlation between the observer's assessment of alertness/sedation and the EEG-entropy during propofol infusion for sedation under spinal anesthesia
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Lee WS, Song HC, Byun JS
- KMID: 2237398
- Korean J Anesthesiol.
- 2008 Oct;55(4):399-403.
- doi: 10.4097/kjae.2008.55.4.399
BACKGROUND: For the patients undergoing propofol sedation under regional anesthesia, continuous monitoring of the hypnotic level is required for adequate sedation and rapid recovery. We evaluated the correlation between the... -
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- Decrease in spectral entropy by low tidal volume ventilation-associated severe hypercapnia: a case report
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Ann J, Jung SM, Park SJ
- KMID: 2377424
- Korean J Anesthesiol.
- 2017 Apr;70(2):213-216.
- doi: 10.4097/kjae.2017.70.2.213
Severe hypercapnia can be predicted by a decrease in cerebral electrical activity. The authors describe a sudden decrease in spectral entropy due to severe hypercapnia-induced respiratory acidosis in a patient... -
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- Change of Complex and Periodic Heart Rate Dynamics with Change of Pulmonary Artery Pressure in Infants with Ventricular Septal Defect
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Yum MK, Kim NS, Woo HO
- KMID: 1938620
- Korean Circ J.
- 1997 Jun;27(6):600-607.
- doi: 10.4070/kcj.1997.27.6.600
BACKGROUND: We studied how periodic and complex heart rate dynamic changes as pulmonary artery pressure increases in 32 infants with ventricular septal defet. In addition, we tested the possibility... -
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- Comparison of bispectral index (BIS) and entropy in patients with cerebral palsy during sevoflurane induction
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Kim NY, Lee IO, Lim BG, Kim HZ, Kong MH, Lee MK, Lim SH, Kim NS
- KMID: 1765436
- Korean J Anesthesiol.
- 2009 Oct;57(4):422-427.
- doi: 10.4097/kjae.2009.57.4.422
BACKGROUND: Demand of anesthesia for patients with cerebral palsy is more increasing. But there is still lacking in clinical research regarding how BIS and entropy reflect well on sedative and... -
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- Effect of preoperative anxiety on spectral entropy during induction with propofol
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Kim YH, Choi WJ
- KMID: 2031250
- Korean J Anesthesiol.
- 2013 Aug;65(2):108-113.
- doi: 10.4097/kjae.2013.65.2.108
BACKGROUND: Anxiety influences brain wave activity. E-Entropy module-derived spectral entropy is an electroencephalographic derivative used to monitor the depth of sedation. This study assessed the effect of preoperative anxiety on... -
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- Effect of neuromuscular blockade reversal by pyridostigmine on spectral entropy values during recovery from desflurane anesthesia: a prospective, randomized, double-blind, controlled trial
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Kim E, Ryu JH, Byun SH
- KMID: 2164845
- Korean J Anesthesiol.
- 2016 Jun;69(3):227-233.
- doi: 10.4097/kjae.2016.69.3.227
BACKGROUND: According to several studies investigating the relationship between muscle activity and electroencephalogram results, reversal of neuromuscular blockade (NMB) may affect depth of anesthesia indices. Therefore, we investigated the effect... -
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- An unexpected increase of entropy in a sleepwalking disorder patient during propofol and remifentanil anesthesia: a case report
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Choi YJ, Kwon K, Bae GE, Yoon SZ, Lee HW, Lim HJ
- KMID: 1937687
- Korean J Anesthesiol.
- 2014 Oct;67(4):270-274.
- doi: 10.4097/kjae.2014.67.4.270
We report a case of increased values of entropy parameters Response Entropy (RE) and State Entropy (SE) during intravenous general anesthesia in a sleepwalking patient. An ASA class II, 64-year-old... -
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- Effects of etomidate on bispectral index scale and spectral entropy during induction of anesthesia by means of the raw electroencephalographic and electromyographic characteristics
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Kim HM, Shin SW, Yoon JY, Lee HJ, Kim KH, Baik SW
- KMID: 2299348
- Korean J Anesthesiol.
- 2012 Mar;62(3):230-233.
- doi: 10.4097/kjae.2012.62.3.230
BACKGROUND: Etomidate frequently induces myoclonus, so it may affect electromyographics (EMG). And EMG commonly has an effect on the bispectral index scale (BIS) and spectral entropy. This study was performed... -
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- Effect of remifentanil or esmolol on bispectral index and entropy to tracheal intubation during propofol anesthesia
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Choi YJ, Shin HW, Kim YH, Choi SU, Park JY, Yoon SZ, Chang SH
- KMID: 1803579
- Anesth Pain Med.
- 2010 Oct;5(4):304-309.
BACKGROUND: The bispectral index (BIS) and entropy (response entropy, state entropy; RE, SE) have been used to monitor the anesthetic depth, and the difference between RE and SE (RE-SE difference)... -
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- Approximate Entropy: Analysis of Fetal Heart Rate Variability in Normal and Growth Retarded Fetuses
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Hwang JH, Park MI, Yum MK
- KMID: 2260716
- Korean J Obstet Gynecol.
- 1997 Jan;40(1):92-99.
OBJECTIVES: This study is aimed to quantify the complex dynamics of beat-to-beat fetal heart rate(FHR) fluctuations by using approximate entropy(ApEn) which is a recently developed mathematical formula quantifying regularity and... -
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- Development of Approximate Entropy of Fetal Heart Rate Varibility during Normal Pregnancy
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Yum MK, Hwang JH, Park MI
- KMID: 2142441
- J Korean Pediatr Soc.
- 1997 Apr;40(4):464-472.
Background : The approximate entropy of heart rate variability has recently been used as a tool in evaluating cardiovascular health and physiology and in diagnosing pertubated physiologic status, by quantifying... -
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