The Value of Integrated Pulmonary Index Monitoring in Detecting Respiratory Events

Samsun Education and Research Hospital

Status: Completed

Conditions: Monitored Anesthesia Care

Treatments: Device: Smart Capnography™, Microstream®

Study type: Interventional

Funder types: Other

Identifiers

NCT05356819

GOKA/2020/16/6

Details and patient eligibility

About

Integrated Pulmonary Index (IPI) is a tool that provides numerical values on a scale of 1-10 based on physiological parameters such as peripheral oxygen saturation (SpO2), pulse rate, respiratory rate, end-tidal carbon dioxide (ETCO2). It is a valuable monitor for sedation procedures and can provide early warning during cardiorespiratory derangements.The aim of the study is to determine whether the Integrated Pulmonary Index (IPI) detects changes in ventilation status early in patients undergoing gastrointestinal endoscopy under sedation, and to determine the risk factors affecting hypoxia and severe hypoxia.

Full description

A single-center and retrospective study was conducted in 154 patients who underwent upper and lower gastrointestinal system endoscopy in the endoscopy unit between October 2018 and December 2019. Patients who were monitored by capnograph in addition to routine monitoring (ECG, noninvasive blood pressure and pulse oximetry monitoring) during the procedure in the endoscopy unit were included in the study.

Patients were administered 2 mg midazolam as premedication for 5 minutes before the procedure and propofol 1-1.3 mg/kg bolus for sedation, followed by repeated doses (10-30 mg) according to the Ramsey sedation score. All patients were given 2 lt/min oxygen via nasal cannula during the procedure. In pulse oximetry, oxygen saturation longer than 15 seconds was defined as less than 92% hypoxia, and below 85% was defined as severe hypoxia.

IPI value was measured with Smart Capnography™, Microstream® Integrated Pulmonary Index device. According to the capnographic information obtained from the patients and preserved in the capnograph disc memory, the planned findings in the study are as follows:

1. Number of hypoxic events observed in patients (SaO2 value below 92% over 15 seconds)
2. Number of severe hypoxic events observed in patients (SaO2 value below 85%)
3. Apnea episodes observed in patients (observation of a straight line longer than 15 seconds on the capnograph, absence of respiratory activity)
4. Time from apnea to development of hypoxia and severe hypoxia in patients who develop hypoxia and severe hypoxia following apnea
5. Time between IPI=1, IPI<7, EtCO2=0 and hypoxia and severe hypoxia.

Enrollment: 154 patients

Sex: All

Ages: 18 to 75 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Patients monitored by capnograph
• ASA I-III
• Patients who underwent an elective endoscopic procedure

Exclusion criteria

• Patients who do not have capnograph monitoring or whose capnography records are missing
• Emergency endoscopic intervention (GIS bleeding, trauma, etc.)
• ASA IV-V
• Patients with pre-procedure SaO2 value below 90%, systolic blood pressure below 90 mmHg, heart rate below 50 beats/minute

Trial design

Primary purpose: Diagnostic

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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154 participants in 1 patient group

Endoscopy

Other group

Description:

Integrated Pulmonary Index (IPI) monitor will be applied to the patients, to provide numerical data obtained from the measurements of end-tidal carbon dioxide, respiratory rate, oxygen saturation measured by pulse oximetry (SpO2), and pulse rate. Patients were administered 2 mg midazolam as premedication for 5 minutes before the procedure and propofol 1-1.3 mg/kg bolus for sedation, followed by repeated doses (10-30 mg) according to the Ramsey sedation score. All patients were given 2 lt/min oxygen via nasal cannula during the procedure.

Treatment:

Device: Smart Capnography™, Microstream®