During fiberoptic endotracheal intubation, the perfect airway exposure produced by the classic curved Macintosh laryngoscope in place of head tilt -chin lift-jaw thrust maneuver may increase the accuracy and produce rapid direct vocal cord access in a short time under Inhalation anesthesia to maintain the respiratory drive for grade III\&VI Modified Mallampati .
Managing difficult airway is critical for anesthesia-related morbidity and mortality. Fiberoptic laryngoscope is a reliable tool for endotracheal intubation in difficult airway cases (Modified Mallampatti III\&IV), but always there is difficulty to visualize the glottis due to airway tendency to collapse, classically a specific fiberoptic airway with a side way is used and it may added head tilt chin lift jaw thrust. A new technique utilizing sevoflurane anesthesia to maintain the respiratory drive without exposing the patient to the stress of the awake airway instrumentation. Simultaneous utilization of both Macintosh curved laryngoscope and Fiberoptic bronchoscope during Endotracheal intubation (ETT) will be examined for the efficacy during difficult airway management. All patients should be examined preoperatively for the scoring Modified Mallampati or non tongue protrusion mallampati (NT-MMT) airway score. The pharyngeal structures were then evaluated and the best view (lowest class) was recorded. The classification follows m-MMT and is as follows: class 1, full visibility of tonsils, uvula, and soft palate; class 2, visibility of hard and soft palate, upper portion of tonsils and uvula; class 3, visibility of the soft and hard palate and base of the uvula; and class 4, visibility of only the hard palate, class III or IV patients were included in the study. Inhalational anesthesia use maintains the respiratory drive of the patient allowing less stressful technique.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
SUPPORTIVE_CARE
Masking
NONE
Enrollment
100
classic fiberoptic bronchoscope, fenstrated airway
oral fiberoptic brochoscopic, Machintosh laryngoscope
Oncolgy Center, Mansoura University,
Al Mansurah, Dakahlia Governorate, Egypt
intubation time
time from introduction of the tip of the fiber optic laryngoscope till insertion of the tube in the laryngeal inlet down in the trachea in seconds.
Time frame: during intubation
lower jaw relaxation
(Relaxed= 0, not fully=1, poor= 2)
Time frame: during intubation
Vocal cord position
(Abducted= 0, Intermediate opening= 1, Closed= 2)
Time frame: during intubation
Neck movements
for endotracheal tube or cuff inflation (no=0, slight= 1, vigorous= 2),
Time frame: during intubation and cuff inflation
Cough
(absent= 0, present=1)
Time frame: during intubation and cuff inflation
1st trial success rate
in percent
Time frame: during intubation
the number of trails
(1st trial=1, 2nd trial= 2, 3rd trial= 3)
Time frame: during intubation
mean arterial Blood pressure (MBP)
basal, every minute during intubation, 1, 3, 5 minutes after intubation
Time frame: during intubation till 5 minutes after intubation
mean heart rate (HR)
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basal, every minute during intubation, 1, 3, 5 minutes after intubation
Time frame: during intubation till 5 minutes after intubation
desaturation (SpO2)
oxygen saturation \<90% .(Yes=1, No= 0)
Time frame: during intubation