Laboratory pipettes are commonly used in biology, medicine, and chemistry. They work by transporting a measured volume of liquid known as the media dispenser. There are different types of laboratory pipettes available including single channel pipettes and multi channel pipettes.
Laboratory pipettes also have different designs and come with different levels of precision and levels of accuracy. Most pipette types work by creating a partial vacuum above the liquid-holding chamber. It also releases the vacuum selectively to draw up and dispense liquid.
Proper Pipetting Postures
The right pipetting posture is one of the most crucial elements to establish good ergonomic work practices. Ideally, when doing a repetitive task like pipetting, it is crucial that you maintain body positions that provide maximum strength with the least amount of stress to the muscles to keep injuries at bay.
Below are some of the proper pipetting postures you should look into:
- Winged elbow pipetting: Position your elbows as close to your body as possible, with your wrists and arms extended in neutral and straight positions. Ensure work items are within easy reach to limit the elevation and extension of the arm. Hand and arm elevation should not exceed 12” from your work surface.
- Clenched fist pipetting: Use pipettes with hooks that allow you to have a relaxed grip. A relaxed grip reduces tension in the wrist, arm, and hand.
- Over rotated arm pipetting: Your forearm rotation angle should be near 45° pronation. This should be maintained to reduce carpal tunnel pressure when doing repetitive activities.