Abstract:
BACKGROUND:As a new electroencephalogram (EEG) signal processing technique for monitoring the depth of anesthesia, entropy consists of two indices: reaction entropy (RE) and state entropy (SE). Our study compared entropy with classical bispectral index (BIS) in reduction of myoelectrical interference and noxious stimuli with EEG signals. METHODS:Two hundred and eighty patients (ASA I-II, 18-60 years old) undergoing scheduled surgeries from seven medical centers were enrolled. Anesthesia induction was managed with propofol via the target-controlled infusion (TCI) system. The results of BIS, RE, SE, mean arterial pressure (MAP) and heart rate (HR) were recorded before anesthesia induction, at the moment of unconsciousness, before and 2 minutes after administration of muscle relaxant, and before and one and three minutes after the tracheal intubation. RESULTS:The values of half maximum effective concentrations (EC50), 5% effective concentrations (EC05) and 95% effective concentrations (EC95) of propofol effect-site concentration at the onset of unconsciousness were 1.2 (1.1-1.3 µg/ml), 2.5 (2.4-2.5 µg/ml) and 3.7 (3.7-3.8 µg/ml), while those of the predicted plasma propofol concentration were 2.8 (2.7-2.9 µg/ml), 3.9 (3.8-3.9 µg/ml) and 4.9 (4.8-5.0 µg/ml), respectively. The values of BIS, SE and RE were 62, 59 and 63 when 50% of patients lost consciousness, and 79, 80, 85 and 42, 37, 44, respectively, when 5% and 95% of patients were unconscious. The values of BIS, RE and SE dropped two minutes after the injection of muscle relaxant, but there were no significant differences between RE and SE. MAP and HR increased visibly, which indicated a reaction to tracheal intubation; the values of BIS, RE and SE, however, did not display any significant changes. CONCLUSIONS:This large-sample multicentric study confirmed the values of RE and SE as approximating BIS value, at the onset of unconsciousness during propofol TCI anesthesia. After elimination of myoelectrical activation, all values of RE, SE and BIS decreased significantly and the three indices were less sensitive to noxious stimuli than cardiovascular responses.
journal_name
Chin Med J (Engl)journal_title
Chinese medical journalauthors
Gao JD,Zhao YJ,Xu CS,Zhao J,Huang YG,Wang TL,Pei L,Wang J,Yao LN,Ding Q,Tan ZM,Zhu ZR,Yue Ysubject
Has Abstractpub_date
2012-04-01 00:00:00pages
1389-92issue
8eissn
0366-6999issn
2542-5641journal_volume
125pub_type
临床试验,杂志文章,多中心研究abstract:BACKGROUND:Mesenchymal stem or stromal cells (MSCs) derived from the induced pluripotent stem cells (iPSCs) have uniform biological activity, which makes the clinical application of MSCs in bone repair possible. Culturing the iPSC-MSCs onto osteoconductive materials is a promising tissue engineering-based strategy in b...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:10.1097/CM9.0000000000000612
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abstract:BACKGROUND:At present, revascularization is still one of the most critical technologies in orthotopic liver transplantation (OLT). Hepatic artery (HA) variations occur frequently in both donors and recipients. Moreover, there are always some pathological changes in the recipient hepatic artery. If handled improperly, i...
journal_title:Chinese medical journal
pub_type: 杂志文章
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abstract:OBJECTIVE:To investigate injury to epidermal melanocyte by Q-switched Alexandrite laser. METHODS:Multiple biopsies were performed on 5 patients with nevus of Ota from before irradiation to 1 year after irradiation. Fourteen specimens were obtained for light microscopy, and 17 for transmission electron microscopy. RES...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
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abstract::Cerebral cysticercosis is the most common worldwide parasitic infection of the central nervous system. Intraventricular involvement is apparent in 15% to 28.8% of cases with neural compartment infestation.' Although different forms of the disease (parenchymatous, subarachnoid, and mixed form ) have been treated succes...
journal_title:Chinese medical journal
pub_type: 杂志文章
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abstract:BACKGROUND:The Medtronic InSync Sentry is the first available cardiac resynchronization therapy defibrillator (CRT-D) which can monitor fluid status by measuring intrathoracic impedance. This study was designed to observe the effectiveness of intrathoracic impedance monitoring on detecting aggravation of heart failure....
journal_title:Chinese medical journal
pub_type: 杂志文章
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abstract:OBJECTIVE:To review the relationship between personal behavior and cultural factors and reproductive tract infections (RTIs). METHODS:An English-language literature search using MEDLINE (1994-1998), Social Science Index (1994-1998), and informal discovery. Any original researches and reviews related to RTIs' epidemiol...
journal_title:Chinese medical journal
pub_type: 杂志文章,评审
doi:
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journal_title:Chinese medical journal
pub_type: 杂志文章,随机对照试验
doi:
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pub_type: 杂志文章
doi:
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journal_title:Chinese medical journal
pub_type: 杂志文章
doi:10.4103/0366-6999.222343
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abstract:BACKGROUND:Interferon (IFN) can inhibit human immunodeficiency virus type 1 (HIV-1) replication in vitro and in clinic. However, IFN therapy for HIV infection was limited by its moderate antiviral efficacy and its frequent adverse effects. In the present study we evaluated the anti-HIV efficacy of a novel synthesized s...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
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abstract::Aluminium citrate (Al-cit) was shown to be biologically effective in preventing silicosis. A total of 917 cases selected from both engineering corps of railway and coalmines with stage 0 or 0+ by radiographs were studied. Cases were randomly divided into Al-cit treatment group and control group with continuing dust ex...
journal_title:Chinese medical journal
pub_type: 临床试验,杂志文章,随机对照试验
doi:
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abstract::The saliva samples from 13 patients with hepatocellular carcinoma and a control group of 21 random healthy adults were measured for alpha-fetoprotein (AFP), using a highly sensitive sandwich enzyme immunoassay specific for human AFP. In patients with hepatocellular carcinoma, significantly higher levels of saliva AFP ...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
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abstract:OBJECTIVE:To evaluate the clinical value of sequential subtraction scintigraphy (SSS) with 99mTc red blood cell (RBC) for the early detection of gastrointestinal (GI) bleeding. METHODS:Ninety patients referred with clinical evidence of GI bleeding underwent 99mTc-RBC scintigraphy with digital gamma camera after labeli...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2001-01-01 00:00:00
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journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2013-01-01 00:00:00
abstract:BACKGROUND:HIV-1 infected and immune-activated macrophages and microglia secrete neurotoxins, such as tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β), which play major role in the neuronal death. It has been shown that different HIV-1 variants have varying abilities to elicit secretion of TNF-α by peripheral...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2011-12-01 00:00:00
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journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2002-07-01 00:00:00
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journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
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journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2006-06-20 00:00:00
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journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
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journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
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journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
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journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2009-06-20 00:00:00
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journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
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doi:
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pub_type: 杂志文章
doi:
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pub_type: 杂志文章
doi:
更新日期:2002-08-01 00:00:00
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pub_type: 杂志文章
doi:
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abstract:Background::Localized macular edema and retinal nerve fiber layer (RNFL) thinning have been reported shortly after laser in situ keratomileusis (LASIK) in adults. However, it is still unclear how LASIK affects the retina of children. This study aimed to investigate the macular retina and RNFL thickness in children with...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:10.4103/0366-6999.213959
更新日期:2017-09-20 00:00:00
abstract:OBJECTIVE:To determine whether extraadrenal tissues synthesize aldosterone in addition to vascular tissue and brain. METHODS:Ex vivo kidney perfusion was performed in normal Wistar rats, ACEI pretreated and adrenalectomized rats prior to the perfusion experiment. After equilibration for 30 minutes, 120 ml of perfusate...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
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