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Stages of General Anesthesia01:22

Stages of General Anesthesia

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Various sedation levels offer significant advantages in facilitating procedural interventions for patients undergoing medical or invasive surgical procedures. These levels span from anxiolysis to general anesthesia, providing a spectrum of sedative effects to cater to specific patient needs. Anxiolysis reduces anxiety and is achieved through minimal sedation, enabling patients to remain awake and responsive while feeling more at ease during the procedure. This level can benefit minor...
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Sedatives and Hypnotics: Overview01:23

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Sedatives are drugs that alleviate anxiety, while hypnotics induce sleep. Both classes of medication suppress neuronal activity, leading to a calming effect for sedatives and facilitating sleep for hypnotics.
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CNS Depressants: Barbiturates and Benzodiazepines01:14

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CNS depressants include drugs from the category of barbiturates and benzodiazepines. They are valuable medications for managing anxiety disorders and insomnia. Barbiturates, once used to induce and maintain sleep, have been replaced mainly by benzodiazepines due to barbiturate's toxicity, tolerance, and overdose risks. They interact with GABAA receptors, leading to sedation at low doses and potentially coma and death at higher doses. Phenobarbital, a long-acting barbiturate, possesses...
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Sedatives and Hypnotics Drugs: Miscellaneous Agents01:17

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Sedatives and hypnotics encompass a wide range of substances, each with its unique mechanism of action, uses, and potential adverse effects.
Melatonin congeners like ramelteon (Rozerem) and tasimelteon (Hetlioz) selectively bind to melatonin receptors (MT1 and MT2) and thus mimic the actions of melatonin, a hormone that regulates sleep-wake cycles. Tasimelteon is primarily used for non-24-hour sleep-wake disorder, common in blind patients. They are also used to treat conditions like insomnia...
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Sedatives and Hypnotics Drugs: Barbiturates01:20

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Sedatives and hypnotics encompass a drug class that acts on the central nervous system (CNS) to alleviate anxiety, promote relaxation and induce sleep.These drugs function by amplifying the actions of the neurotransmitter γ-aminobutyric acid (GABA), resulting in reduced neuronal activity. Barbiturates, a subset of sedatives and hypnotics first synthesized in the late 1800s, are categorized into ultra-short, short, intermediate, and long-acting groups based on their duration of effect. A...
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Halogenated Agent Delivery in Porcine Model of Acute Respiratory Distress Syndrome via an Intensive Care Unit Type Device
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Sedation in the Intensive Care Unit.

Valerie Page1,2, Cathy McKenzie3,4

  • 1Department of Anaesthesia, Watford General Hospital, Vicarage Road, Watford, WD18 0HB UK.

Current Anesthesiology Reports
|May 3, 2021
PubMed
Summary
This summary is machine-generated.

Recent literature on sedation for mechanically ventilated adults shows mixed results for dexmedetomidine. While guidelines suggest light sedation, clinical practice varies, highlighting the need to address clinician concerns about deep sedation and agitation.

Keywords:
Critical careDexmedetomidineIntensive careProtocolSedationVentilation

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Area of Science:

  • Critical Care Medicine
  • Pharmacology
  • Intensive Care Unit Management

Background:

  • Sedation is crucial for mechanically ventilated adult patients in intensive care units (ICUs).
  • Recent literature (last 5 years) explores various sedation strategies and their impact on patient outcomes.
  • Understanding current practices and evidence is vital for optimizing patient care.

Purpose of the Study:

  • To review and synthesize recent literature on sedation delivery in mechanically ventilated adult ICU patients.
  • To evaluate the effectiveness of different sedative agents, particularly dexmedetomidine.
  • To identify gaps between research findings and clinical practice.

Main Methods:

  • Narrative review of literature published within the last five years.
  • Focus on studies related to sedation in adult patients requiring mechanical ventilation in ICUs.
  • Analysis of publications concerning dexmedetomidine and other sedation protocols.

Main Results:

  • Increased publications on dexmedetomidine, but clinical trials do not consistently support systematic review findings on reduced delirium, agitation, or length of stay.
  • Guidelines recommend light sedation, yet significant variation exists in clinical practice and research.
  • Protocols using no sedative infusions with as-needed morphine boluses are safe and feasible; educational interventions can reduce adverse events.

Conclusions:

  • Research trials often focus on individual drugs rather than comprehensive practice.
  • There is a slow translation of evidence into clinical practice.
  • Further work is needed to understand and address clinician concerns regarding deep sedation and agitation management.