Clinical trial NCT03021551: Oxygen Reserve Index: Utility as Early Warning for Desaturation in Morbidly Obese Patients
Official title: Oxygen Reserve Index: Utility as Early Warning for Desaturation in Morbidly Obese Patients
Study type: INTERVENTIONAL
Overall status: COMPLETED
Conditions: Morbid Obesity
Surgery
Keywords: oxygen
desaturation
obesity
Lead sponsor: Masimo Corporation
Sponsor class: INDUSTRY
First posted: 2017-01-16
Enrollment: 80
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: OTHER

Brief summary: The Oxygen Reserve Index (ORi) is a reference that could help clinicians with their assessments of normoxic and hyperoxic states by scaling the measured absorption information between 0.00 and 1.00. An ORi of 0.00 corresponds to partial pressure of oxygen (PaO2) values of 100 mmHg and below and an ORi of 1.00 corresponds to PaO2 values of 200 mmHg and above. This is clinical study designed to evaluate the clinical utility of the Oxygen Reserve Index (ORI) as an early warning for arterial hemoglobin desaturation during the induction of general anesthesia and tracheal intubation in obese patients undergoing elective surgical procedures.


Eligibility criteria: Inclusion Criteria:

* Age greater than 18 years
* BMI\>30, \<40 m/kg2
* Control group only: BMI \>18.5 m/kg2, \<25 m/kg2
* Scheduled for an elective surgical procedure requiring general anesthesia and endotracheal intubation

Exclusion Criteria

* Age less than 18 years
* Adults unable to give primary consent
* Pregnancy
* Prisoners

Primary outcomes:
measure: Utility of ORi Providing Added Warning Time
timeFrame: 1 year
Secondary outcomes:
Other outcomes:
Locations:
city: Sacramento
country: United States
facility: UC Davis Health
state: California
Study officials:
References:
citation: Shah U, Wong J, Wong DT, Chung F. Preoxygenation and intraoperative ventilation strategies in obese patients: a comprehensive review. Curr Opin Anaesthesiol. 2016 Feb;29(1):109-18. doi: 10.1097/ACO.0000000000000267.
citation: Jense HG, Dubin SA, Silverstein PI, O'Leary-Escolas U. Effect of obesity on safe duration of apnea in anesthetized humans. Anesth Analg. 1991 Jan;72(1):89-93. doi: 10.1213/00000539-199101000-00016.
citation: Bodily JB, Webb HR, Weiss SJ, Braude DA. Incidence and Duration of Continuously Measured Oxygen Desaturation During Emergency Department Intubation. Ann Emerg Med. 2016 Mar;67(3):389-95. doi: 10.1016/j.annemergmed.2015.06.006. Epub 2015 Jul 9.
citation: Applegate RL 2nd, Dorotta IL, Wells B, Juma D, Applegate PM. The Relationship Between Oxygen Reserve Index and Arterial Partial Pressure of Oxygen During Surgery. Anesth Analg. 2016 Sep;123(3):626-33. doi: 10.1213/ANE.0000000000001262.
citation: Szmuk P, Steiner JW, Olomu PN, Ploski RP, Sessler DI, Ezri T. Oxygen Reserve Index: A Novel Noninvasive Measure of Oxygen Reserve--A Pilot Study. Anesthesiology. 2016 Apr;124(4):779-84. doi: 10.1097/ALN.0000000000001009.
citation: Tsymbal E, Ayala S, Singh A, Applegate RL 2nd, Fleming NW. Study of early warning for desaturation provided by Oxygen Reserve Index in obese patients. J Clin Monit Comput. 2021 Aug;35(4):749-756. doi: 10.1007/s10877-020-00531-w. Epub 2020 May 18.