Detecting wakefulness during general anaesthesia for caesarean section.

Tunstall, M.E.

doi:10.1136/bmj.1.6072.1321-a

Cited by 198 publications

(71 citation statements)

References 3 publications

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“…Another intraoperative awareness phase is the state of wakefulness, when the patient is able to react to stimuli during surgery, but does not recall nor is conscious of the experienced reactions 5 .…”

Section: General Anesthesia and Intraoperative Awarenessmentioning

confidence: 99%

Fatores de risco para o despertar intraoperatório

Nunes¹,

Porto²,

Miranda³

et al. 2012

Rev. Bras. Anestesiol.

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Summary: Nunes RR, Porto VC, Miranda VT, Andrade NQ, Carneiro LMM -Risk Factors for Intraoperative Awareness. Background and objectives:The intraoperative awareness is an adverse event in the general anesthesia, and may occur in approximately 20,000 cases per year, which justifies the study of the risk factors for this event. The objective of this study was to review this subject in order to reduce the incidence of intraoperative awareness and psychological sequelae incurring from this incident, which may result in post-traumatic stress disorder with negative repercussions on the surgical patient social, psychic and functional development.

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Section: General Anesthesia and Intraoperative Awarenessmentioning

confidence: 99%

Fatores de risco para o despertar intraoperatório

Nunes¹,

Porto²,

Miranda³

et al. 2012

Rev. Bras. Anestesiol.

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“…Unfortunately, the technique is limited by the time that the tourniquet can remain inflated and also the surgeon and surgical field may be disturbed by any sudden unexpected movement of the isolated arm. Tunstall used the technique during anaesthesia for Caesarean section and nine of his 12 patients showed marked arm movements during the procedure, four of the nine responding appropriately to instructions [27]. Russell has demonstrated that 61% of a group of patients anaesthetised with thiopentone, tubocurarine and nitrous oxide/oxygen (70:30), with modest hyperventilation, were able to move their arm to command, were free of pain but had no explicit recall of intra-operative events.…”

Section: Conscious Perception Without Explicit Memorymentioning

confidence: 99%

“…They actually range from 30 to 100 Hz and may overlap with the beta band (15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30). It is believed that an important function of the '40-Hz' rhythm is to bind together the many discontinuous cortical networks needed in the conscious process.…”

Section: The 40-hz Steady-state Responsementioning

confidence: 99%

Patients' memories of events during general anaesthesia

Bailey

Jones

1997

Anaesthesia

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SummaryAwareness remains a serious complication of general anaesthesia with potential adverse psychological sequelae. Even during seemingly adequate general anaesthesia, implicit memory may be retained along with the ability to subconsciously process auditory stimuli. As a result behaviour may be modified and postoperative progress influenced. We shall discuss the structure of memory and the effects of increasing doses of general anaesthesia on cognitive processes. In addition methods of assessing the depth of anaesthesia will be reviewed.

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“…[2][3][4] Although the brain is the major target organ of anaesthetic drugs, ironically this organ system has been largely ignored in routine monitoring during anaesthesia and major surgery. The complexity of the equipment and the difficulty of reading an unprocessed EEG tracing has limited its use in the operating room.…”

Section: En Utilisant Sur L'avant-bras La Technique De Tunstall Du Gamentioning

confidence: 99%

Awareness detection during Caesarean section under general anaesthesia using EEG spectrum analysis

et al. 1995

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This study examined the relationship between the EEG (spectral edge frequency en utilisant sur l'avant-bras la technique de Tunstall du garot isolant. Les patientes ont dtd rdparties au hasard pour recevoir soit du thiopentone (4 rag" kg -I) soit de la kdtamine (1 mg" kg-t) pour l'induction. Avant l'administration intraveineuse de succinylcholine, un garot isolant a dtd appliqud sur l'avant-bras et gonfl~ d 200 mmHg pour conserver l'activitd motrice de l'avant-bras. L'EEG a dt~ enregistrd 5 rain avant l~nduction et pendant l'anesth~sie. L~ncidence des r~ponses des ordres verbaux a dtd inf~rieure dans le groupe k~tamine (24%) (SEF90 moyenne 12,0 -t-3 Hz) comparativement au groupe thiopentone (52%) (SEFgO moyenne 18,09 + 3). Ces rdsultats suggbrent qu'une valeur de SEF inf~rieure ,~ 8.6 Hz suffit pour pr~venir la rdponse aux ordres verbaux.Awareness is the unintentional regaining of consciousness during presumed general anaesthesia and it has been recognized increasingly since the routine use of neuromuscular relaxants, i It can be a terrifying experience, representing a human and a medico-legal problem. [2][3][4] Although the brain is the major target organ of anaesthetic drugs, ironically this organ system has been largely ignored in routine monitoring during anaesthesia and major surgery. The complexity of the equipment and the difficulty of reading an unprocessed EEG tracing has limited its use in the operating room. 5During the past decade, as a result of advances in computer-processed EEG analyzers, routine EEG monitoring in the operation room is becoming more common; the information obtained from the EEG being converted into a simplified form for the clinician.The most widely used technique to process the EEG is power-spectrum analysis, which uses a computer to perform a Fourier transformation. In an attempt to simplify the description of the EEG, a number of descriptive variables has been derived from the power-spectrum analysis and they have been suggested as indicators of anaesthetic depth. 6,7 One of the most commonly used is CAN J ANAESTH 1995 / 42:5 / pp 377-81

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Detecting wakefulness during general anaesthesia for caesarean section.

Cited by 198 publications

References 3 publications

Fatores de risco para o despertar intraoperatório

Fatores de risco para o despertar intraoperatório

Patients' memories of events during general anaesthesia

Awareness detection during Caesarean section under general anaesthesia using EEG spectrum analysis

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