Airway Morbidity
Conditions
Keywords
laryngeal tube, cuff pressure, leakage, laryngeal mask
Brief summary
Optimization the cuff pressure of the laryngeal tube (LT) in relation of the mechanical ventilation, and the reduction of potential leakage mucosal trauma. Comparison of the tightness of LT between the filling volume specified by the manufacturer (connectors are color coded syringe and blocker), 60cmH₂O, 50cmH₂O, 40cmH₂Ound 30cmH₂O. The measurement of the leakage occurs in ml / kg body weight.
Detailed description
The ventilation of both cuffs of the laryngeal tube by using the color coding of syringe and connector is a simple, fast and easy way to stabilize the tube and secure seal against the surrounding tissue. The user of this method has only knowledge of the volume (ml), with which the cuff is vented, but not over the cuff pressure (cmH₂O) itself. Permanently high pressures can cause to a lesions to necrosis in the adjacent tissue, on the other hand, the material of the bulging cuff fits less well the anatomy of the patient, leading to leaks in the breathing circuit. Studies of pediatric anesthesia show that on 40cmH₂O reduces the volume of the leak in the laryngeal mask airway by reducing the cuff pressure and the ventilation is improved in sequence. In the proposed study, the volume of leakage at the fill volume specified by the manufacturer (color coding), 60cmH₂O, 50cmH₂O, 40cmH₂O and 30cmH₂O to be captured.
Interventions
DEVICEReduce Cuff pressure
We reduce the Cuff Pressure from the LTS-D (Laryngeal Tube suction) from 60 to 50 to 40 to 30cmH2O and measure the Delta from Inspiration to Expiration Tidalvolume (Delta Vt). The Delta Vt shows the actual leakage.
Sponsors
Johannes Gutenberg University Mainz
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Age ≥ 18 Years * No concurrent participation in another study * capacity to consent * Present written informed consent of the research participant * Elective surgery under general anesthesia * Height\> 150cm
Exclusion criteria
* Age \<18 years * Existing pregnancy * Lack of consent * inability to consent * emergency patients * Emergency situations in the context of a Difficult Airway Management * ASA classification\> 3 * situations where the possibility of accumulated gastric contents * Indications for intubation with endotracheal tube * Height \<150cm * Participation in another study
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Comparison of Leakage between the different Cuff Pressure | < 5 Minutes | We want to measure the tightness of the reduced Cuff Pressure |
Countries
Germany
Outcome results
None listed