Evaluation of Preoperative Nasoendoscopy to Predict Difficult Intubation

NCT ID: NCT05043779

Last Updated: 2021-09-14

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Clinical Phase

NA

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2020-08-12

Study Completion Date

2022-03-01

Brief Summary

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Despite the availability of different methods for airway assessment, unexpectedly difficult intubations occur at a frequency of up to 15%. A variety of pre-intubation clinical screening tests have been advocated to predict difficult laryngoscopy and airway but their usefulness is limited in obese patients.

Could awake invasive airway assessment be more predictive for difficult airways in obese patients? The use of nasendoscopy assessment for the airway could be a useful additional invasive tool to predict the difficult airway in obese

Detailed Description

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Predictors of difficult laryngoscopy and intubation may be less useful or irrelevant when there is a plan for video laryngoscopes (VL) intraoperative. VL improves laryngeal view in most patients, Their use achieves a high success rate for intubation of patients with predicted difficult intubation, and those who have failed direct laryngoscopy\[6\]. In a study of over 2000 (VL) video laryngoscopies intubations, Mallampati's score did not correlate with failed intubation. The strongest predictor of failure was neck pathology, including the presence of a surgical scar, radiation changes, or mass. In another study, risk factors for difficult VL intubation after direct laryngoscopy were Cormack-Lehane grade 3 or 4 views with direct laryngoscopy, short sternothyroid distance, and high upper lip bite test score. Obesity is a recognized risk factor for difficulty with airway management. An audit of major complications of airway management (NAP4) from over three million anesthetics in the United Kingdom found twice as many case reports of major complications in obese patients, especially in the morbidly obese.

It is less clear whether obesity increases the risk of difficult laryngoscopy or intubation. Some studies suggest that obesity is a risk factor for both difficult mask ventilation and difficult laryngoscopy, while other studies suggest that with proper positioning and preparation, ventilation and laryngoscopy are not difficult \[12,13\]. Wilson's score is an important development in predictivity of airway difficulties, Wilson's in his study (1988) attempted to deductively identify patients for whom intubation will be difficult.

This study aims to demonstrate the use of preoperative awake fibreoptic examination

Conditions

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Difficult or Failed Intubation Obesity, Morbid

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

DIAGNOSTIC

Blinding Strategy

NONE

Study Groups

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Preoperative Awake Airway Nasoendoscopy

only one arm

Group Type OTHER

Awake Airway Nasoendoscopy

Intervention Type PROCEDURE

Preoperative Awake Airway Nasoendoscopy of upper airway

Interventions

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Awake Airway Nasoendoscopy

Preoperative Awake Airway Nasoendoscopy of upper airway

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

* Adult patients between 18-60 years of age either male or female with (ASA I, II or III ), scheduled for a bariatric procedure with a body mass index (BMI) greater than 35 K/M2, will be enrolled

Exclusion Criteria

* Patients on the tracheostomy tube
* Patients who are unable to give consent
Minimum Eligible Age

18 Years

Maximum Eligible Age

60 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Hamad Medical Corporation

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Nabil Shallik, M.D.

Role: PRINCIPAL_INVESTIGATOR

Hamad Medical Corporation - HMC

Locations

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ACC, Hamad Medical Corporation

Doha, Doah, Qatar

Site Status RECRUITING

Countries

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Qatar

Central Contacts

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nabil Shallik, M.D.

Role: CONTACT

9745543926

Facility Contacts

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Nabil Shallik, M.D.

Role: primary

References

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Butler PJ, Dhara SS. Prediction of difficult laryngoscopy: an assessment of the thyromental distance and Mallampati predictive tests. Anaesth Intensive Care. 1992 May;20(2):139-42. doi: 10.1177/0310057X9202000202.

Reference Type RESULT
PMID: 1595845 (View on PubMed)

Janssens M, Hartstein G. Management of difficult intubation. Eur J Anaesthesiol. 2001 Jan;18(1):3-12. doi: 10.1046/j.0265-0215.2000.00777.x.

Reference Type RESULT
PMID: 11270007 (View on PubMed)

Qudaisat IY, Al-Ghanem SM. Short thyromental distance is a surrogate for inadequate head extension, rather than small submandibular space, when indicating possible difficult direct laryngoscopy. Eur J Anaesthesiol. 2011 Aug;28(8):600-6. doi: 10.1097/EJA.0b013e328347cdd9.

Reference Type RESULT
PMID: 21610502 (View on PubMed)

Langeron O, Masso E, Huraux C, Guggiari M, Bianchi A, Coriat P, Riou B. Prediction of difficult mask ventilation. Anesthesiology. 2000 May;92(5):1229-36. doi: 10.1097/00000542-200005000-00009.

Reference Type RESULT
PMID: 10781266 (View on PubMed)

Tremblay MH, Williams S, Robitaille A, Drolet P. Poor visualization during direct laryngoscopy and high upper lip bite test score are predictors of difficult intubation with the GlideScope videolaryngoscope. Anesth Analg. 2008 May;106(5):1495-500, table of contents. doi: 10.1213/ane.0b013e318168b38f.

Reference Type RESULT
PMID: 18420866 (View on PubMed)

Samsoon GL, Young JR. Difficult tracheal intubation: a retrospective study. Anaesthesia. 1987 May;42(5):487-90. doi: 10.1111/j.1365-2044.1987.tb04039.x.

Reference Type RESULT
PMID: 3592174 (View on PubMed)

Sun DA, Warriner CB, Parsons DG, Klein R, Umedaly HS, Moult M. The GlideScope Video Laryngoscope: randomized clinical trial in 200 patients. Br J Anaesth. 2005 Mar;94(3):381-4. doi: 10.1093/bja/aei041. Epub 2004 Nov 26.

Reference Type RESULT
PMID: 15567809 (View on PubMed)

Lundstrom LH, Moller AM, Rosenstock C, Astrup G, Wetterslev J. High body mass index is a weak predictor for difficult and failed tracheal intubation: a cohort study of 91,332 consecutive patients scheduled for direct laryngoscopy registered in the Danish Anesthesia Database. Anesthesiology. 2009 Feb;110(2):266-74. doi: 10.1097/ALN.0b013e318194cac8.

Reference Type RESULT
PMID: 19194154 (View on PubMed)

Heinrich S, Birkholz T, Ihmsen H, Irouschek A, Ackermann A, Schmidt J. Incidence and predictors of difficult laryngoscopy in 11,219 pediatric anesthesia procedures. Paediatr Anaesth. 2012 Aug;22(8):729-36. doi: 10.1111/j.1460-9592.2012.03813.x. Epub 2012 Feb 20.

Reference Type RESULT
PMID: 22340664 (View on PubMed)

Collins JS, Lemmens HJ, Brodsky JB, Brock-Utne JG, Levitan RM. Laryngoscopy and morbid obesity: a comparison of the "sniff" and "ramped" positions. Obes Surg. 2004 Oct;14(9):1171-5. doi: 10.1381/0960892042386869.

Reference Type RESULT
PMID: 15527629 (View on PubMed)

Brodsky JB, Lemmens HJ, Brock-Utne JG, Vierra M, Saidman LJ. Morbid obesity and tracheal intubation. Anesth Analg. 2002 Mar;94(3):732-6; table of contents. doi: 10.1097/00000539-200203000-00047.

Reference Type RESULT
PMID: 11867407 (View on PubMed)

Wilson ME, Spiegelhalter D, Robertson JA, Lesser P. Predicting difficult intubation. Br J Anaesth. 1988 Aug;61(2):211-6. doi: 10.1093/bja/61.2.211.

Reference Type RESULT
PMID: 3415893 (View on PubMed)

Vicini C, De Vito A, Benazzo M, Frassineti S, Campanini A, Frasconi P, Mira E. The nose oropharynx hypopharynx and larynx (NOHL) classification: a new system of diagnostic standardized examination for OSAHS patients. Eur Arch Otorhinolaryngol. 2012 Apr;269(4):1297-300. doi: 10.1007/s00405-012-1965-z. Epub 2012 Feb 19.

Reference Type RESULT
PMID: 22350494 (View on PubMed)

Soares MC, Sallum AC, Goncalves MT, Haddad FL, Gregorio LC. Use of Muller's maneuver in the evaluation of patients with sleep apnea--literature review. Braz J Otorhinolaryngol. 2009 May-Jun;75(3):463-6. doi: 10.1016/S1808-8694(15)30667-4.

Reference Type RESULT
PMID: 19649500 (View on PubMed)

Other Identifiers

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MRC-01-19-107

Identifier Type: -

Identifier Source: org_study_id

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