Effect of Different Supralottic Airway Devicess on Optic Nerve Sheath Diameter

Study Overview
=================
Brief Summary
-----------------
Direct laryngoscopy and tracheal intubation are associated with increases in intraocular pressure (IOP), intracranial pressure (ICP), heart rate (HR), and blood pressure. The use of supraglottic airway devices (SADs) are known to be beneficial in overcoming the disadvantages of laryngoscopy and tracheal intubation, especially ocular and pressure stress responses. In recent years, it has been reported that ultrasonographic measurement of optic nerve sheath diameter (ONSD) can be used in the diagnosis of increased ICP. The aim of our study is to compare the effects of Proseal laryngeal mask airway (pLMA), Suprem laryngeal mask airway (sLMA) and I-gel on hemodynamic response and ONSD during insertion in adult patients.

Official Title
-----------------
The Effect of Supralottic Airway Devicess on Hemodynamic Response and Optic Nerve Sheath Diameter. PROSEAL LMA, SUPREMA LMA, I-JEL LMA

Conditions
-----------------
Intracranial Pressure Increase, Supraglottic Airway Device, Optic Nerve Sheath Diameter

Intervention / Treatment
-----------------
* Other: pLMA: PROSEAL LARYNGEAL MASK, sLMA : SUPREMA LARYNGEAL MASK, I-jel =I-GEL


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: ASA physical status of I-II elective surgery non-ophthalmic procedures 1-2 h duration general anaesthesia supine position Exclusion Criteria: Mallampati and ASA status ≥III, a history or suspect of difficult airway, previous intracranial/ocular surgery, cerebral edema/high intracranial pressure, glaucoma, uncontrolled hypertension -, diabetic retinopathy, obstetric patients, those who refused to participate in the study

Ages Eligible for Study
-----------------
Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
Accepts Healthy Volunteers

Study Plan
=================
How is the study designed?
-----------------

Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| pLMA(n=30)<br> | Other: pLMA: PROSEAL LARYNGEAL MASK, sLMA : SUPREMA LARYNGEAL MASK, I-jel =I-GEL<br>* a SAD was inserted by all anaesthetists participating in the study had at least 3 years experience of airway management and were experienced with both the pLMA, sLMA and I-jel. Inadequate ventilation after two attempts was considered a failed placement, and these patients were excluded, while the practitioner was freed to use an alternative airway device.<br>|
| sLMA(n=30)<br> | Other: pLMA: PROSEAL LARYNGEAL MASK, sLMA : SUPREMA LARYNGEAL MASK, I-jel =I-GEL<br>* a SAD was inserted by all anaesthetists participating in the study had at least 3 years experience of airway management and were experienced with both the pLMA, sLMA and I-jel. Inadequate ventilation after two attempts was considered a failed placement, and these patients were excluded, while the practitioner was freed to use an alternative airway device.<br>|
| I-jel(n=30)<br> | Other: pLMA: PROSEAL LARYNGEAL MASK, sLMA : SUPREMA LARYNGEAL MASK, I-jel =I-GEL<br>* a SAD was inserted by all anaesthetists participating in the study had at least 3 years experience of airway management and were experienced with both the pLMA, sLMA and I-jel. Inadequate ventilation after two attempts was considered a failed placement, and these patients were excluded, while the practitioner was freed to use an alternative airway device.<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| OPTIC NERVE SHEATH DIAMETER | effects of different types of laryngeal masks onoptic nerve sheath diameter | 10 min after using supraglottic airway devices | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
Supraglottic airway device, hemodynamic response, optic nerve sheath diameter