Oxygen Deficiency
Conditions
Keywords
Oxygen reserve index,, Preoxygenation, Cerebral Oxygen Saturation
Brief summary
The primary aim of this study is to compare the effectiveness of ORI and rcSO2 in predicting hypoxia early in obese patients who are sensitive to hypoxia. Our secondary aim is; To determine whether there is a correlation between the changing trend of ORI and rcSO2 in obese patients.
Detailed description
Standard noninvasive monitoring will be applied to the patients taken to the operating table, and heart rate, mean arterial pressure, peripheral oxygen saturation (SpO2), oxygen reserve index (ORI), regional cerebral oxygen saturation, etCO2 values will be recorded. Cerebral oximeter probe placed in the middle of the forehead (every second Cerebral oxygen saturation will be continuously monitored using a rcSO2 reading) (Massimo)Preoxygenation will be performed until the expiratory O2 concentration is 90% (during spontaneous ventilation, FIO2 will be kept between 100% 6 lt7min flow rate and EtCO2 30-35 mmHg). 2 mg midazolam, 2 ug General anesthesia with /kg fentanyl, 3 mg/kg propofol, 0.6 mg/kg rocuronium and 100% O2 will be applied and intubated with a videolaryngoscope. The breathing circuit will be disconnected from the endotracheal tube until the SpO2 drops to 94%. At that time, the breathing circuit will be connected and the patients will be ventilated with 100% FiO2, 8 ml kg-1 ideal body weight, targeted tidal volume, and 5 cm H2O positive end-expiratory pressure until the ORI plateaus. Throughout this process, ORI and cerebral oxygen saturation will be recorded continuously. ORI and rcO2 data will be compared at seven specific time points ( (1) during the basal period; (2) at the end of preoxygenation when ORI reaches a plateau; (3) at the beginning of intubation; (4) when SpO2 reaches 97%; (5) when SpO2 reaches 94% (6) ORI reaches a plateau again (during ventilation with 100% FiO2), and (7) SpO2 reaches baseline
Interventions
DEVICEmonitoring
rc02, ORI , spO2
Sponsors
Dr. Lutfi Kirdar Kartal Training and Research Hospital
Study design
Observational model
CASE_CONTROL
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to 75 Years
Healthy volunteers
Yes
Inclusion criteria
* ASA I-III patients * The ages of 18-75 * Obese BMI (40\>BMI\>30 kgm\^2) * Undergoing intubated elective surgery
Exclusion criteria
* Patients with significant cardiopulmonary comorbidities * BMI\>40 kgm\^2 and BMI\<30 kg m\^2 * ASA\>3 * Patients under 18 years and over 75 years of age
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Comparison of Oxygen Reserve Index and Regional Cerebral Oxygen Saturation Indetermining Hypoxia in Obese Patients | after intubation time until spO2 reaches to 97% and 94% and ori reaches to the plato.Expected to take approximately five minutes | The primary aim of this study is to compare the effectiveness of ORI and rcSO2 in predicting hypoxia early in obese patients (BMI 30-40 kg/m\^2) (weight and height will be combined to report BMI in kg/m\^2) |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Comparison of Oxygen Reserve Index and Regional Cerebral Oxygen Saturation Indetermining Hypoxia in Obese Patients | time until spo2 is 94% and 97% and ori reaches to the plato.Expected to take approximately five minutes | Our secondary aim is; To determine whether there is a correlation between the changing trend of ORI and rcSO2 in obese patients. |
Countries
Turkey (Türkiye)
Contacts
Primary ContactGülten A Arslan, Assos Prof
Backup ContactBanu Eler Cevik, Prof
Outcome results
None listed