Clinical Trial Details
— Status: Not yet recruiting
Administrative data
| NCT number |
NCT04951089 |
| Other study ID # |
0087-21-BNZ |
| Secondary ID |
|
| Status |
Not yet recruiting |
| Phase |
N/A
|
| First received |
|
| Last updated |
|
| Start date |
June 1, 2022 |
| Est. completion date |
October 31, 2022 |
Study information
| Verified date |
April 2022 |
| Source |
Bnai Zion Medical Center |
| Contact |
n/a |
| Is FDA regulated |
No |
| Health authority |
|
| Study type |
Interventional
|
Clinical Trial Summary
Establishing a definitive airway defined as a tube placed in the trachea with cuff inflated
below the vocal cords is the first priority in the airway management of the pre-hospital
trauma patient, according to the last edition of the Advanced Trauma Life Support (ATLS)
textbook, of the American College of Surgeons. However, studies revealed that the success
rate of tracheal intubation in the prehospital setting using direct laryngoscopy (DL), the
standard intubation technique is suboptimal. The Advance Trauma Life Support suggested the
use of Supraglottic Airway Devise (SAD) in managing the difficult airway. The air-Q SP 3G was
introduced as an alternative for managing the difficult airway. The i-gel is proposed as
supraglottic device made of a medical grade thermoplastic elastomer. The unique design of
both devices is that a cuff is not needed to be inflated .
A randomize controlled trail will be conduce. Participants will insert the both supraglottic
devices to compare performance of ventilation and oxygenation of the patients.
The insertion will be performed on age 18-75 year patients, scheduled for elective surgery
with general anesthesia. The SAD use in the study will be a single use i-gel size 4 or 5 and
the air-Q SP 3G- size 4 or 5 For induction of anesthesia all patients will receive
premedication. After 3 min of preoxygenation anesthesia will induce with up to 2 mcg/Kg
fentanyl and 2-3 mg propofol Neuromuscular blockade will be obtained with rocuronion.
The participant will performed one insertion of the i-gel or the air-Q SP 3G on the patient
while manual in-line stabilization of the neck Primary outcome: time to success insertion of
SAD Secondary outcome : duration in seconds of insertion
Description:
In the combat setting, airway compromise is the second leading cause of preventable death
after hemorrhage.
Establishing a definitive airway defined as a tube placed in the trachea with cuff inflated
below the vocal cords is the first priority in the airway management of the pre-hospital
trauma patient, according to the last edition of the Advanced Trauma Life Support (ATLS)
textbook, of the American College of Surgeons. However, studies revealed that the success
rate of tracheal intubation in the prehospital setting using direct laryngoscopy (DL), the
standard intubation technique is suboptimal.
Possible reasons for the failure in achieving definitive airway in trauma patients are the
requirement for in-line stabilization of the neck, and the inexperience of the providers.
The Tactical Combat Casualty Care (TCCC) Guidelines recommend using a supraglottic airway
device (SAD) as an option to assist in securing the airway in tactical evacuation phase of
care.
In a recent published Randomized Control Trail in patients, the success of blind intubation
did not support the use of tracheal intubation (TI) via iLTS-D by novice intubators. However,
this study revealed a high success rate (84.6%) of iLTS-D placement in the oropharynx,
associated with effective ventilation as confirmed by capnography.
The time to obtain successful iLTS-D placement in the oropharynx was 42 sec, which is 2.5
times shorter than the time to achieve TI with DL.
These results encourage the use of a second generation Supraglottic Airway Device (SAD) by
novice intubators as the first airway intervention in trauma patients, who require immediate
airway management.
SADs play a key role as primary and rescue devices in predicted and unanticipated difficult
airway management, by providing both a patent airway for oxygenation and ventilation and a
conduit for TI, thereby avoiding the disastrous outcomes of 'cannot intubate, cannot
oxygenate' situations.
Recently study reported the effectiveness of initial insertion with Laryngeal Tube (LT) vs
initial Endotracheal Intubation (ETI) in adults out of Hospital cardiac arrest (OHCA).This
study concludes that a strategy of initial LT insertion was associated with significantly
greater 72-hour survival compare with the strategy of initial ETI.
These findings suggest that SAD insertion may be considered as an initial airway management
strategy in patients with OHCA.
The implication of the SAD effectivity in fasting rescue the airway pattern and reassure
oxygenation is greatest importance in combat setting.
The self-pressurized air-Q intubating laryngeal airway (air-Q SP 3G) (Mercury Medical,
Clearwater, FL, USA) is a single-use SAD that does not require cuff inflation. The original
air-Q intubating laryngeal airway (Cookgas LLC; Mercury Medical) was designed to facilitate
tracheal intubation through its lumen.
The air-Q SP 3G differs from the original air-Q by the absence of an inflatable cuff and the
continuity between the airway tube and cuff through an inner aperture at the junction the
airway tube and periglottic cuff of the air-Q SP 3G makes the intracuff pressure equilibrate
dynamically with the airway pressure and is designed to adjust to the patient's pharyngeal
and periglottic anatomy .
The absence of a pilot balloon and continuity between the airway tube and the cuff through an
inner aperture has several clinical benefits when compared with other cuffed SAD.
First, the provider does not loose time with the inflation cuff maneuver. Second, intra-cuff
pressures are determined by the airway pressures, because of the equalization of pressures
with the movement of gas between the cuff and airway tube.
Third, lower intra-cuff pressures are maintained overall as a result of being limited by the
peak airway pressures, with the highest pressures exerted during inspiration. Fourth, by not
exceeding peak airway pressures, the balance between intra-cuff pressures and the airway seal
of the device may be optimized at lower pressure. Therefore, the risk of sore throat,
neuropraxic injury, and gastric insufflation seen with overinflation of traditional cuffed
supraglottic devices may be reduced.
Recently, the air-Q SP 3G has been upgraded with the addition of the gastric channel in order
diminish the risk of aspiration.
The i-gel second generation SAD, disposable airway (Intersurgical Ltd, Workingham, UK) is a
SAD made of a medical grade thermoplastic elastomer. Its unique design does not need an
inflatable cuff because the thermoplastic elastomer provides the seal. The i-gel is gaining a
reputation for its ease of insertion and for its use in many clinical situations. Previous
studies have demonstrated that the i-gel can be placed more faster than conventional
laryngeal mask airways, which might play a role in prehospital settings. Other advantages of
the i-gel are ease of training, cost, safety, and simplicity of use.
There have been no studies comparing these devices in patients with limited neck extension.
Therefore, the aim is to compare the clinical performance of these two devices in adult
patients with simulated cervical immobilization.
