Clinical trial NCT03282604: The Ideal Length of the Nasotracheal Tube Considering Nasotracheal Tube Size
Official title: The Ideal Length of the Nasotracheal Tube Considering Nasotracheal Tube Size
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Nasotracheal Intubation for General Anesthesia
Keywords: Intubation
Intratracheal
Nasopharynx
Lead sponsor: Yonsei University
Sponsor class: OTHER
First posted: 2017-09-14
Enrollment: 146
Sex: ALL
Minimum age (years): 20
Maximum age (years): 70
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: COHORT
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Patients who are scheduled for nasotracheal intubation for general anesthesia

Brief summary: The nasotracheal intubation is preferred for oral surgery; it provides an easier view of the surgical field. However, nasotracheal tubes are produced by foreign countries. Tubes are often not fitted in anatomy of Korean people because of small nostril. When the size of the tube is chosen by nostril size, the length of nasotracheal tube is not appropriate to the glottis. The aim of this study is to evaluate the appropriateness of the tube depth and to suggest the ideal length of the nasotracheal tube during the intubation of the selected tracheal tube in consideration of the size of the nasal cavity in Koreans. 146 patients (73 males and 73 females) who are scheduled for nasal intubation for general anesthesia will be enrolled. The primary outcome is the ideal length of tube that allows the distance from the vocal cords to the proximal portion of the tube cuff to be greater than 2 cm and the tip of the intubated tube to be located 5 ± 2 cm above the tracheal carina. The size of nostril, length from the nare to the carina and vocal cord are measured.


Eligibility criteria: Inclusion Criteria:

1. Patients who are scheduled for nasotracheal intubation for general anesthesia

Exclusion Criteria:

1. age\<20 years
2. ASA class III or more
3. pregnancy
4. emergency surgery
5. nasal airway disease
6. expected difficult intubation (difficult intubation history, Modified Mallampati score 4, mouth opening \<2cm, facial anomaly)
7. cervical movement disorder (cervical disease, cervical pain)

Primary outcomes:
measure: the ideal length of the nasotracheal tube during the intubation of the selected tracheal tube in consideration of the size of the nasal cavity in Koreans
timeFrame: through study completion, an average of 1 year
Secondary outcomes:
Other outcomes:
Locations:
city: Seoul
country: Korea, Republic of
facility: Department of Anesthesiology and Pain Medicine, Severance
Study officials:
References:
citation: Stoneham MD. The nasopharyngeal airway. Assessment of position by fibreoptic laryngoscopy. Anaesthesia. 1993 Jul;48(7):575-80. doi: 10.1111/j.1365-2044.1993.tb07119.x.
citation: Reed DB, Clinton JE. Proper depth of placement of nasotracheal tubes in adults prior to radiographic confirmation. Acad Emerg Med. 1997 Dec;4(12):1111-4. doi: 10.1111/j.1553-2712.1997.tb03691.x.
citation: Han DW, Shim YH, Shin CS, Lee YW, Lee JS, Ahn SW. Estimation of the length of the nares-vocal cord. Anesth Analg. 2005 May;100(5):1533-1535. doi: 10.1213/01.ANE.0000149900.68354.33.