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Physiological Control of Respiration01:23

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Breathing, a seemingly passive process, is regulated by the respiratory center in the brainstem. This center coordinates the involuntary control of respirations, which means it occurs without conscious effort, ensuring a smooth and uninterrupted pattern.
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Oxygen therapy is a pivotal aspect of medical care, particularly for patients with respiratory ailments. Two prominent oxygen-delivering systems include the Venturi mask and the transtracheal oxygen catheter.
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Administering Oxygen by Mask01:30

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Oxygen Delivering System I: Nasal Cannula and Face Mask01:26

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The human body requires oxygen to function, and when the natural process of respiration is hindered, external devices, including the following, are needed to help deliver this vital gas.
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Airway management is a key skill in emergency and critical care settings, as maintaining a clear airway is essential for adequate oxygenation and ventilation.Head Tilt-Chin Lift TechniqueThe head tilt-chin lift maneuver is an essential technique primarily used in patients without suspected cervical spine injuries. To perform this maneuver, one hand is placed on the patient’s forehead, and gentle pressure is applied backward to tilt the head. The fingertips of the other hand are positioned...
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Related Experiment Video

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A Novel Inhalation Mask System to Deliver High Concentrations of Nitric Oxide Gas in Spontaneously Breathing Subjects
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Continuous Titration of Inspired Oxygen Using Oxygen Reserve Index to Decrease Oxygen Exposure During One-Lung

Mikyung Yang1, Jie Ae Kim1, Hyun Joo Ahn1

  • 1From the Departments of Anesthesiology and Pain Medicine.

Anesthesia and Analgesia
|March 4, 2022
PubMed
Summary
This summary is machine-generated.

Continuous titration of fraction of inspired oxygen (Fio2) using the oxygen reserve index (ORI) did not reduce overall oxygen exposure during one-lung ventilation (OLV). However, ORI showed potential in specific surgical phases.

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Area of Science:

  • Anesthesiology
  • Critical Care Medicine
  • Thoracic Surgery

Background:

  • High fraction of inspired oxygen (Fio2) during one-lung ventilation (OLV) is non-physiologic and can cause complications.
  • The oxygen reserve index (ORI) is a novel metric for monitoring oxygenation.
  • This study investigated if ORI-guided Fio2 titration can minimize oxygen exposure during OLV.

Purpose of the Study:

  • To evaluate the efficacy of continuous Fio2 titration guided by ORI compared to conventional management during OLV.
  • To determine if ORI reduces overall oxygen exposure and improves patient outcomes.

Main Methods:

  • A randomized, double-blinded trial involving patients undergoing thoracic surgery.
  • Patients were assigned to either an ORI group (n=64) or a control group (n=60).
  • Fio2 was titrated using continuous ORI monitoring or standard arterial blood gas analysis.

Main Results:

  • Overall time-weighted average Fio2 did not significantly differ between the ORI and control groups (P = .09).
  • A subgroup analysis revealed reduced Fio2 in the ORI group after pulmonary vascular ligation (P = .0261).
  • Incidence of intraoperative hypoxia and postoperative complications did not differ between groups.

Conclusions:

  • Continuous ORI-guided Fio2 titration does not reduce overall oxygen exposure during OLV.
  • ORI may offer benefits in specific intraoperative scenarios, warranting further investigation.