#1 Clinical Trials Search in Europe

Isoflurane

This article examines the use of isoflurane, an inhaled anesthetic, in various clinical trials. Isoflurane is being studied for its potential benefits in sedation, anesthesia, and patient recovery across different medical scenarios, including intensive care, brain injury, and surgical procedures. The trials aim to compare isoflurane to other anesthetics and evaluate its effects on patient outcomes, recovery times, and overall safety.

Table of Contents

What is Isoflurane?

Isoflurane is a type of medication known as a volatile anesthetic. It is also referred to by its brand name, Forane[1]. Volatile anesthetics are gases that are inhaled to put patients to sleep during surgery or to keep them sedated in intensive care units. Isoflurane is one of several options in this class of drugs, which also includes sevoflurane and desflurane[2].

Uses of Isoflurane

Isoflurane is primarily used for the following purposes:

  • General Anesthesia: It is commonly used to keep patients unconscious during various types of surgery, including abdominal and eye surgeries[1][3].
  • Sedation in Intensive Care Units (ICUs): Isoflurane can be used to keep patients sedated when they are on mechanical ventilation (breathing machines) in the ICU[4].
  • Treatment of Seizures: In some cases, isoflurane is being studied as a potential treatment for severe seizures that don’t respond to other medications (known as refractory status epilepticus)[5].

How Isoflurane Works

Isoflurane works by affecting the brain and nervous system to produce unconsciousness and prevent the feeling of pain. It is inhaled into the lungs and then absorbed into the bloodstream, where it travels to the brain. In the brain, it interacts with various receptors to reduce brain activity, leading to unconsciousness[1].

Administration of Isoflurane

Isoflurane is administered as a gas that patients breathe in. It is typically given through a breathing mask or tube connected to an anesthesia machine. The concentration of isoflurane can be adjusted by the anesthesiologist to maintain the appropriate depth of anesthesia. This is usually measured in terms of MAC (Minimum Alveolar Concentration), with 1 MAC of isoflurane being about 1.2% concentration[1].

In some newer applications, such as in ICU sedation, isoflurane may be delivered through specialized devices like the Sedaconda ACD-S[4].

Comparison with Other Anesthetics

Isoflurane is often compared to other volatile anesthetics like sevoflurane and desflurane, as well as intravenous anesthetics like propofol. Each of these medications has its own characteristics:

  • Isoflurane vs. Sevoflurane: Both are commonly used in surgery. Sevoflurane may allow for slightly faster awakening in some cases[1].
  • Isoflurane vs. Desflurane: Desflurane may allow for even faster awakening than isoflurane, but it is often more expensive[2].
  • Isoflurane vs. Propofol: Propofol is given intravenously rather than inhaled. Current research is comparing these two methods for sedation in ICUs[4].

Potential Benefits

Researchers are studying several potential benefits of isoflurane:

  • Faster Recovery: Some studies are looking at whether isoflurane allows patients to wake up and recover more quickly after surgery compared to other anesthetics[2].
  • Brain Protection: There is interest in whether isoflurane might have protective effects on the brain during surgery[6].
  • Improved Sedation in ICUs: Researchers are investigating if isoflurane might provide better quality sedation for patients on ventilators compared to intravenous medications[4].

Safety and Side Effects

Isoflurane is generally considered safe when administered by trained professionals. However, like all medications, it can have side effects. These may include:

  • Nausea and vomiting after surgery
  • Changes in blood pressure and heart rate
  • Slowed breathing
  • Shivering during recovery

In rare cases, more serious side effects can occur. Your anesthesiologist will monitor you closely to prevent and manage any potential complications[4].

Ongoing Research

Several clinical trials are currently underway to further understand the benefits and applications of isoflurane:

  • Its use in patients with severe head injuries[6]
  • Comparison with propofol for long-term sedation in ICUs[4]
  • Its potential in treating severe seizures[5]
  • Effects on cognitive function and recovery after surgery[7]

These studies aim to improve our understanding of isoflurane and potentially expand its uses in medical care.

Aspect Details
Primary Uses General anesthesia, sedation in ICU, traumatic brain injury management
Comparison Drugs Propofol, desflurane, sevoflurane
Potential Benefits Improved sedation quality, faster wake-up times, shorter extubation times, possible neuroprotective effects
Areas of Study Effects on intracranial pressure, cognitive recovery, quality of recovery, opioid use reduction
Administration Methods Inhaled via specialized devices (e.g., Sedaconda ACD-S)
Patient Populations ICU patients, surgical patients, traumatic brain injury patients
Outcome Measures Quality of Recovery scores, time to awakening, cognitive function, days free of mechanical ventilation

FAQ

  • What is isoflurane? Isoflurane is an inhaled anesthetic gas used for general anesthesia during surgery and for sedation in intensive care units. It helps keep patients unconscious and pain-free during medical procedures.
  • How is isoflurane being studied in clinical trials? Isoflurane is being studied in various ways, including its use in sedation for mechanically ventilated ICU patients, its effects on patients with traumatic brain injury, and its comparison to other anesthetics like propofol and desflurane in surgical procedures.
  • What are the potential benefits of using isoflurane? Potential benefits being studied include improved sedation quality, faster wake-up times, shorter extubation times, and possible protective effects on the brain in certain conditions. Some trials are also examining if it can reduce the need for opioids and improve overall patient recovery.
  • Are there any risks associated with isoflurane use? While isoflurane is generally considered safe, researchers are studying its effects on intracranial pressure in brain injury patients and comparing its safety profile to other anesthetics. As with any medical treatment, there may be potential side effects that are being closely monitored in these trials.
  • How might isoflurane impact patient recovery after surgery? Some studies are investigating whether isoflurane can lead to faster wake-up times, quicker cognitive recovery, and overall improved quality of recovery compared to other anesthetics. This could potentially result in shorter hospital stays and better patient experiences post-surgery.

Ongoing Clinical Trials on Isoflurane

  • Study on Isoflurane, Propofol, and Dobutamine Hydrochloride for Sedation in Adults with Severe Cardiogenic Shock on ECMO

    Recruiting

    1 1 1 1
    Investigated diseases:
    Investigated drugs:
    France

  • Study Comparing Isoflurane and Propofol for Sedation in Critically Ill Patients on Mechanical Ventilation

    Recruiting

    1 1 1 1
    Investigated diseases:
    Investigated drugs:
    Spain

  • Evaluation of opioid use with nociceptive monitoring in intensive care patients receiving deep sedation with isoflurane, propofol, and midazolam

    Not yet recruiting

    1 1 1 1
    Investigated drugs:
    Spain

  • Study on the Effects of Isoflurane and Propofol on Delirium in Intensive Care Patients on Mechanical Ventilation

    Not recruiting

    1 1 1 1
    Investigated diseases:
    Investigated drugs:
    France

Glossary

  • Isoflurane: An inhaled anesthetic gas used for general anesthesia and sedation in medical procedures.
  • Sedation: The use of drugs to induce a state of calm or sleep in patients, often used in intensive care or during medical procedures.
  • Intracranial pressure (ICP): The pressure inside the skull and brain tissue, which can be affected by brain injuries or certain medical conditions.
  • Mechanical ventilation: The use of a machine to assist or replace spontaneous breathing, often used in intensive care units.
  • Traumatic brain injury (TBI): A disruption in the normal function of the brain caused by a bump, blow, or jolt to the head.
  • Propofol: An intravenous anesthetic drug commonly used for inducing and maintaining general anesthesia.
  • Desflurane: Another inhaled anesthetic gas, similar to isoflurane but with different properties.
  • Extubation: The removal of a tube that has been placed into a patient's airway to assist with breathing.
  • Quality of Recovery (QoR) score: A measure used to assess a patient's overall well-being and recovery after surgery and anesthesia.
  • Minimal Alveolar Concentration (MAC): A measure of the potency of inhaled anesthetics, representing the concentration required to prevent movement in 50% of patients in response to surgical stimulation.
  • Opioids: A class of drugs used for pain relief, which can have significant side effects and potential for dependence.
  • Cognitive recovery: The return of mental processes such as thinking, remembering, and reasoning after a period of impairment due to anesthesia or medical conditions.
  • Bispectral Index (BIS): A measure of the depth of anesthesia, used to monitor the level of consciousness during general anesthesia.
  • Tachyphylaxis: A rapid decrease in the response to a drug after repeated doses over a short period of time.

References

  1. https://clinicaltrials.gov/study/NCT00521612
  2. https://clinicaltrials.gov/study/NCT06252207
  3. https://clinicaltrials.gov/study/NCT04188314
  4. https://clinicaltrials.gov/study/NCT05327296
  5. https://clinicaltrials.gov/study/NCT05830864
  6. https://clinicaltrials.gov/study/NCT06311604
  7. https://clinicaltrials.gov/study/NCT01911195