Effect of Different Supralottic Airway Devicess on Optic Nerve Sheath Diameter

Zonguldak Bulent Ecevit University90 enrolled

Overview

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.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Intracranial Pressure Increase Supraglottic Airway Device Optic Nerve Sheath Diameter

Interventions

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.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 65 YearsHealthy volunteers:

Medical Language ↔ Plain English

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

Outcomes

Primary Outcomes

OPTIC NERVE SHEATH DIAMETER

effects of different types of laryngeal masks onoptic nerve sheath diameter

Time frame: 10 min after using supraglottic airway devices