Supraglottic Jet Oxygenation Ventilation During Hysteroscopic Surgery

Condition(s) studied

Investigational drug(s) / intervention(s)

NCgroup: The patients in this group received oxygen therapy via nasal cannula at a flow rate of 5 L/min, with an oxygen concentration of 100%. An end-tidal carbon dioxide (ETCO2) monitoring catheter was placed at the nostril opening to monitor ETCO2, observe whether the waveform was regular, and record the values.

SJOVgroup: Gently insert an appropriately sized WNJ tube into one nostril of the subject. Connect one port of the tube to a jet ventilator (Twinstream), with the following SJOV (Synchronized Jet Ventilation) parameters: Driving pressure (DP): 15 psi (1 bar ≈ 15 psi) Respiratory rate: 15 breaths per minute Inspiratory-to-expiratory ratio (I:E): 1:2 Fraction of inspired oxygen (FiO₂): 100% Connect the other port to an end-tidal carbon dioxide (ETCO₂) monitoring catheter to observe the ETCO₂ waveform for regularity and record the numerical values.

Study summary

Hysteroscopic surgery is widely used in the diagnosis and treatment of gynecological diseases. Because its operation process can cause anxiety and pain in patients, it needs to be performed under anesthesia. At present, patients under conventional non-intubation general anesthesia are prone to respiratory depression and hypoxemia. Supraglottic jet oxygen supply and ventilation (SJOV) technology can provide reliable oxygen supply and ventilation for patients with respiratory arrest and respiratory depression. It can assist in completing difficult tracheal intubation, especially in emergency airway situations where "intubation and ventilation cannot be performed". It can effectively avoid catastrophic outcomes and also prevent and reduce hypoxemia in patients undergoing day surgery. However, there are very few studies on hysteroscopic surgery. This study intends to design a single-center randomized controlled study. Patients scheduled for elective hysteroscopic surgery were randomly divided into two groups: the conventional nasal catheter ventilation group and the SJOV group. The feasibility of supraglottic jet oxygenation ventilation in hysteroscopic surgery was studied through different airway management methods. The primary outcome measure was the incidence of intraoperative hypoxemia (75%≤SpO2\<90%, ≤60 seconds), and the secondary outcome measures were subclinical respiratory depression, sore throat and other adverse events. The expected result is that supragttic jet ventilation can improve the incidence of hypoxia in patients during hysteroscopy, reduce sore throat or other complications at the same time, promote patient recovery, and improve patient satisfaction.

Eligibility

Primary outcome measure(s)

• Incidence of hypoxemia — Perioperative
  75%\<=SPO2\<90%

Trial sites (1)

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