The aim of this study was to compare outcomes of blind Nasotracheal intubation methods with and without warming of endotracheal tube. blind nasotracheal intubation clinically is A method of intubation without Observation of glottis that is used when the orotracheal intubation is difficult or impossible. Blind nasotracheal intubation is recommended in difficult airway algorithm. Of Course the success rate of this method is less and its complications increase. This method is the most common intubating method in difficult intubation conditions that Anesthesiologists are used. Approachs that has been done to minimize nasotracheal Complications Includes the use of lubricants, vasoconstrictor, lower size endotracheal tube and telescoping tube into endotracheal catheters and warming Nasotracheal tube. According to previous studies, the warming endotracheal tube is a good practice because it increases the flexibility of the tube when passes through the high curvature of nasopharynx, and the The result will be less trauma that is important in patients with pathologies that are prone to injury and epistaxis. Therefore, regard to the favorable results of warming the endotracheal tube in Nasotracheal intubation, this study want to answer this question that does warming tracheal tube in Blind nasotracheal intubation for apneic and anesthetized patients increase the success rate of this method? 60 patients for this study were considered.
In each group of 30 patients with the use of the Website www.randomizer.org will be divided into two Randomized groups. In both groups Was used a similar Blind nasotracheal intubation method , With this difference that in one group Intubation tube is warm and the other group is not warm. main Exclusion criteria included:
1 - limited mouth opening less than 35 mm
2 - Mallampati III and above
3 - thyromental distance of less than 65 mm
4 - sternomental distance of less than 12.5 cm
Main Inclusion criteria were:
1- ASA physical class I and class II
2 - elective maxillofacial surgeries need to nasal intubation
Spss version 16 will be used for analysis of the data . Descriptive statistics (frequency, percentage, mean and standard deviation) will be used to describe the data. T-test will be used for comparison the intubation time and success rate, HR, MBP and SaO2. Chi-squre will be used To compare the number of attempts, epistaxis, sore throat and laryngospasm. T-test for age and weight and Chi-squre will be used for ASA, type of surgery, Associated Disease and sex. Repeated measured T-test method is used FOR Changes will be measured repeatedly during the procedure, such as HR, MBP and SaO2.