Scope of application of anti flattening test clamp for oral and cheek parts

Scope of application of anti flattening test clamp for oral and cheek parts

Scope of application of anti flattening test clamp for oral and cheek parts

Anti flattening test clamp for oral and cheek parts----YYT 0977-2023

The anti flattening test clamp for the oral and cheek parts isYY/T 0977-2023The key tooling components used in the "Anesthesia and Respiratory Equipment Oropharyngeal Airway" standard to evaluate the resistance of the oropharyngeal airway to deformation under pressure, ensuring its ability to maintain airway patency in clinical use.

According to the standard appendixBAccording to normative regulations, the design and operational requirements for this test clamp are as follows:

Geometric parameters of clamp head:

The angle is(60±2)°, used to simulate the compression angle of oral tissue on the airway;

The chamfer radius of the working surface is(1.0±0.5)mm(Some materials mention it as10±0.5mmTo prevent abnormal deformation caused by stress concentration, please refer to the standard original text;

The width of the clamp should be greater than the width of the buccal portion of the test pharyngeal airway to ensure contact and even application of force.

Loading force requirements‌：

For identification specifications5.5Or below the oropharyngeal airway, apply(100±10)NThe force exerted;

For identification specifications6Or above the oropharyngeal airway, apply(200±20)NThe force exerted;

The force needs to be maintained3Minute, simulate continuous compression state.

State adjustment:

Before the experiment, place the oropharyngeal airway in(34±2)Conditioning at ℃1Hour by hour, simulate human oral temperature conditions to ensure stable material properties.

Measurement and evaluation:

During the loading process, use an accuracy of ±0.10mmMeasuring tools are used to determine the minimum internal dimensions of the buccal region;

After uninstallation, observe its recovery condition and ensure that it can quickly restore its original shape without deformation;

The final result must meet the standard table1The minimum inner diameter limit requirement for the corresponding specifications.

This clamp is usually integrated into specialized testers (such as those produced by Millet Instruments)YY/T0977Testers are widely used in conjunction with mechanical testing machines for factory inspections in medical device manufacturing enterprises and compliance verification in third-party testing institutions.