- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03374644
Correlation of ETCO2 to PaCO2 Measured by Sentri Nasal Cannula
Correlation of End Tidal Carbon Dioxide to Arterial Partial Pressure Carbon Dioxide Measured by Sentri Nasal Cannula. A Study in Spontaneously Breathing Non Intubated Patients Undergoing Cataract Surgery With Local Anaesthesia
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
After due approval from ethical review board and written consent, 40 patients who is scheduled for an elective eye procedure in which direct arterial blood pressure monitoring is appropriate will be recruited into this study. End tidal carbon dioxide will be sampled via SentriTM ETCO2 adult nasal cannula (Intersurgical ® code 1144002) during preoperative and intraoperative period. ETCO2 is measured by infrared spectroscopy (Datex-Ohmeda GE Healthcare S5, Compact monitor, Switzerland) with a side stream aspirator which has a flow rate of 150mL/min.
Standard monitoring with continuous electrography (ECG), non-invasive blood pressure(NIBP) monitoring and pulse oximetry will be used for all patients. A baseline blood pressure, heart rate, respiratory rate, oxygen saturation (SaO2) and ETCO2 will be recorded. During preoperative period, a 20-gauge, radial artery catheter was inserted under aseptic technique. It is used to obtain arterial blood gas measurement of partial pressure oxygen and carbon dioxide (PaO2, PaCO2) Blood gas will be analyzed by using ABL 800 flex blood gas analyzer (Radiometer Medical ApS, Denmark) with calibrations recommended by the manufacturer. No sedation will be given during preoperative period.
Following the placement of indwelling radial artery catheter, Sentri nasal cannula will be placed into the nostril of the patients Subjects will be asked to breath normally for a period of five minutes . Nasal breathing will be confirmed by presence of an acceptable CO2 tracing.Blood is drawn from indwelling arterial catheter for blood gas determination 5 minutes after the modified nasal cannulae is in place. At the same time as the arterial blood gas sample is taken, an ETCO2 sample is also obtained. A baseline (without oxygen flow) ETCO2, PaO2, SPO2, respiratory rate and PaCO2 will be recorded. The respiratory rate will be determined by counting the respiration for 15 seconds and multiplying by four. Subjects will not be asked to keep their mouth close when using the nasal cannula as it might alter the variability inherent in patients who mouth breathe during conscious sedation. After a baseline ETCO2 is established, oxygen will be administered at 2,4, and 6 liters per minute for a period of five minutes. At each level of oxygen administration, an average ETC02 reading will be recorded after achieving stable recordings. Simultaneously, PaO2 and PaCO2 will be obtained by drawing arterial blood from arterial indwelling catheter. Heart rate, respiratory rate, blood pressure will also be routinely recorded.
Sedation will be given to the patients intraoperatively. Riker Sedation-Agitation Scale (SAS) will be used to assess the level of sedation during intraoperative period. Titrated dose of midazolam will be given to the patient with the target of SAS score of 3 (difficult to arouse but awakens to verbal stimuli or gentle shaking, follow simple commands but drifts off again). During intraoperative period, oxygen will be administered at 2 and 4 liters per minutes for a period of five minutes. ETCO2, PaCO2 and PaO2 level will be recorded during each level of oxygen administration.
Study Type
Enrollment (Anticipated)
Phase
- Not Applicable
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Patients who are classified as ASA (American Society of Anesthesiologist) physical status 1 to 3 with age more than 18 years' old, and are scheduled for elective eye surgery
Exclusion Criteria:
- Patients who are less than 18 years old, have chronic lung disease, nasal obstruction, nasal congestion or craniofacial abnormalities
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: ETCO2 monitoring with nasal cannula
SentriTM ETCO2 adult nasal cannula (Intersurgical ® code 1144002) will be placed into patient's nostril following radial artery catheter insertion.
A baseline (without oxygen flow) ETCO2, PaO2, SPO2, RR and PaCO2 will be recorded.
Oxygen will then be administered at 2,4, and 6 liters per minute for a period of five minutes.ETCO2, PaCO2 and PaO2 will be recorded for each level of oxygen administration.Sedation will be given during intra-operative period with the target of Observer Assessment of alertness/sedation scale (OAA/S) score of 3.
During intraoperative period, oxygen will be administered at 2 and 4 liters per minute for a period of five minutes.
ETCO2, PaCO2 and PaO2 level will be recorded during each level of oxygen administration.
|
Sentri nasal cannula is the device which designed to sample exhaled ETCO2 in non-intubated patients during the administration of supplementary oxygen.
By delivering oxygen through one prong and sampling exhaled gas from the other prong, the nasal cannula can provide end tidal values comparable to those achieved with intubated patients.
It is fitted to the patients as same manner as conventional nasal cannula.
Furthermore, it consists of curved prong to improve the anatomical fit.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
accuracy of end tidal carbon dioxide as a measure of arterial carbon dioxide levels by using Sentri cannula
Time Frame: 30 minutes
|
30 minutes
|
Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (Anticipated)
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 2017925-5591
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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