- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02993003
Optimal Positioning of Nasopharyngeal Temperature Probes
Optimal Positioning of Nasopharyngeal Temperature Probes in Pediatric Patients: A Prospective Cohort Study
Core temperature is of greatest interest in terms of temperature monitoring as it is thought to represent the temperature of the vessel-rich groups that are instrumental in thermoregulatory control. The nasopharynx is among the recommended temperature monitoring sites for core body temperature. It is the part of the pharynx that lies above the soft palate. Anteriorly it opens to the nasal cavities through the choanae; inferiorly it communicates with the oropharynx through the pharyngeal isthmus. Nasopharyngeal temperatures are accurate in adults when probes are inserted between 10 and 20 cm.
The optimal depth for insertion of nasopharyngeal probes remains poorly defined in infants and children. While some data suggest that anthropometric measurements are well correlated with endoscopic measurements in infants based on weight, the accuracy of temperature measurements at these and other distances has yet to be quantified. The investigators thus propose to determine the insertion depth (or range of depths) for nasopharyngeal temperature proves that best approximate core temperature as measured in the distal esophagus in infants and children of various sizes. The comparison site will be the distal esophagus since there is broad consensus that the distal third of the esophagus it at core-body temperature.
For the two groups of infants aged up to twelve months, the nasopharyngeal probe will be marked with indelible ink from 2-10 cm in 1-cm increments and inserted 10 cm. For the two groups of children between 1 and 5 years, the nasopharyngeal probe will be marked with indelible ink from 2-15 cm in 1.5-cm increments and inserted 10 cm. For older children, a nasopharyngeal probe will be marked with indelible ink from 2 to 20 cm at 2 cm increments from its tip, and inserted 20 cm.
Both nasopharyngeal and esophageal temperatures will initially be recorded 30 minutes after induction of anesthesia. Nasopharyngeal probes will then be withdrawn at the designated increment for each age group and will be equilibrated for 5 minutes before the temperature is recorded. Thereafter, the nasopharyngeal withdrawal sequence will be repeated. The number of measurement will depend on the initial depth of insertion, with measurements continuing until only 2 centimeters remain in the nostril.
Study Overview
Status
Conditions
Intervention / Treatment
Study Type
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
Ohio
-
Cleveland, Ohio, United States, 44195
- Cleveland Clinic
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Elective non-cardiac surgery in children to last at least 1.5 hours;
- Supine position anticipated;
- General endotracheal anesthesia.
Exclusion Criteria:
- Nasopharyngeal disease (e.g. sinusitis), upper airway abnormalities, or planned oral or facial surgery;
- History of genetic or congenital anomalies leading to facial dimorphism;
- History of recent substantive epistaxis or suspected bleeding disorder;
- Therapeutic-dose anti-coagulation;
- Contraindication to esophageal temperature probe insertion (i.e., esophageal varices, congenital anomalies).
Study Plan
How is the study designed?
Design Details
- Primary Purpose: OTHER
- Allocation: NON_RANDOMIZED
- Interventional Model: PARALLEL
- Masking: NONE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
OTHER: Children between 7 months and 12 months
nasopharyngeal probe will be marked with indelible ink from 2-10 cm in 1-cm increments and inserted 10 cm
|
nasopharyngeal probe insertion
|
OTHER: children between 1 and 5 years
nasopharyngeal probe will be marked with indelible ink from 2-15 cm in 1.5-cm increments and inserted 10 cm
|
nasopharyngeal probe insertion
|
OTHER: children between 6 and 12 years
a nasopharyngeal probe will be marked with indelible ink from 2 to 20 cm at 2 cm increments from its tip, and inserted 20 cm
|
nasopharyngeal probe insertion
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
nasopharyngeal and esophageal temperatures
Time Frame: up to 2 hrs during surgery
|
nasopharyngeal and esophageal temperatures at each depth
|
up to 2 hrs during surgery
|
Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (ACTUAL)
Primary Completion (ACTUAL)
Study Completion (ACTUAL)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (ESTIMATE)
Study Record Updates
Last Update Posted (ACTUAL)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Other Study ID Numbers
- 15-1216
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
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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