| 1 | Handle Ergonomics and Balance | Examine grip diameter, surface texture, control placement, center of gravity, and whether the device can be held securely with gloved hands. | Perform a simulated intubation while wearing clinical gloves. The handle should remain stable without excessive wrist bending, finger stretching, or frequent grip changes. | Good balance reduces hand fatigue and helps the operator maintain controlled blade movement during a time-critical procedure. |
| 2 | Optical Image Quality | Check field of view, image brightness, focus, color rendition, lens clarity, anti-fog performance, and visibility around anatomical obstructions. | Evaluate the image on a standard airway training manikin under bright and low-ambient-light conditions. Confirm that the view remains clear after repeated insertion and withdrawal. | A stable, clear image can reduce unnecessary blade movement and support more precise placement while limiting soft-tissue contact. |
| 3 | Weight and Physical Dimensions | Compare total operating weight, handle length, blade profile, insertion clearance, and suitability for different patient sizes. | Record the assembled weight with the power source installed. Confirm that available blade sizes cover the intended adult, pediatric, or specialty airway range. | A compact, appropriately sized system is easier to position and transport, while a complete size range supports safer patient selection. |
| 4 | Durability and Mechanical Reliability | Review resistance to repeated blade attachment, cable strain, impact, fluid exposure, and wear at joints, locks, buttons, and optical components. | Check that the blade locks positively, the optical path remains aligned, and controls function consistently after repeated assembly cycles and routine handling. | Mechanical failure during airway management can interrupt visualization or delay treatment, so secure connections and predictable operation are essential. |
| 5 | Cleaning, Disinfection, and Reprocessing | Verify the manufacturer’s validated reprocessing method, compatible disinfectants, moisture protection, detachable parts, and access to surfaces that may retain biological material. | Select a device only when its instructions for use specify the required cleaning and disinfection level. Confirm that reusable components tolerate the stated process without optical damage. | Incomplete or incompatible reprocessing may damage the device or create a cross-contamination risk between patients. |
| 6 | Handling Safety and User Controls | Assess one-handed operation, button accessibility, accidental activation risk, glove compatibility, anti-slip grip, sharp edges, and blade-lock visibility. | Test the device with wet and dry gloves. Confirm that illumination or recording controls can be operated without diverting attention from the airway. | Intuitive controls and secure handling help prevent dropped equipment, unintended commands, and delays during airway management. |
| 7 | Power, Readiness, and Compatibility | Review battery type, charging method, operating-time indication, startup time, backup availability, accessory compatibility, and connection security. | Perform a pre-use check for battery status, illumination, image transmission, blade attachment, and display connection. Keep a charged backup power source available according to local policy. | Reliable readiness reduces avoidable interruptions and supports continuity if the primary power source or display fails. |