The Effect of Oxygen Therapy on Atelectasis

Evaluation of Oxygen Threapy by Lung Ultrasound and Oxygen Reserve Index in Patients Undergoing Cesarean Section Under Spinal Anesthesia

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT05509764

Enrollment

Registered

2022-08-22

Start date

2021-05-01

Completion date

2022-08-01

Last updated

2022-08-26

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Atelectasis, Cesarean Section, Hypotension

Keywords

Atelectasis, lung ultrasound, oxygen reserve index, cesarean section

Brief summary

In pregnancy, cephalal shift of the diaphragm caused by the enlarged uterus reduces the functional residual capacity and may increase the closure volume and predispose the pregnant woman to airway closure, leading to atelectasis. The development of atelectasis due to dermatomes retained in spinal anesthesia and intraoperative supine position may increase further. Oxygen therapy to be applied may also lead to absorption atelectasis by causing hyperoxia. The aim of our study is to evaluate the effect of oxygen support on the lungs in cesarean section operations under spinal anesthesia by lung ultrasound score and oxygen reserve index.

Interventions

DIAGNOSTIC_TESTlung ultrasound score

determination of atelectasis by lung ultrasound score

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

FEMALE

Age

18 Years to 47 Years

Healthy volunteers

Yes

Inclusion criteria

* 18-50 years old * ASA I-II * Patients scheduled for elective cesarean section under spinal anesthesia

Exclusion criteria

* alcohol or drug addiction, chronic obstructive pulmonary disease, cardiovascular disease, smokers anemia, liver or kidney disease, coagulation disorders allergic to anesthetic agents, sepsis or bacterial infection, body temperature is below 35°C and above 38°C Multiple pregnancy Preoperative hypoxemia SpO2\<94% Diabetes mellitus Hypertension Placenta previa Premature rupture of membranes Intrauterine growth retardation Preeclampsia-eclampsia-fetal distress Polyhydramnios Morbid obesity BMI\>45

Design outcomes

Primary

Measure	Time frame	Description
atelectasis	during the surgery	measuring atelectasis due to oxygen therapy

Secondary

Measure	Time frame	Description
APGAR score	1st and 5th min after delivery	baby status after delivery
hypotension	during surgery	maternal hypotension

Countries

Turkey (Türkiye)

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026