Bolus in facial filler: what it means

A bolus is a deposit of product concentrated in a single point, instead of spread along a path. In facial filler, the term comes up when the goal is to create support or localized projection, usually in a deep plane, close to the bone.

It contrasts with linear techniques, such as retrograde threading, in which the product is deposited as a thread while the instrument is withdrawn.

When does the term come up?

Bolus is usually mentioned in structural areas, where the product acts as support for the tissues above, such as the cheekbone area and the chin. In these cases, firmer gels that hold their shape tend to be preferred. The indication, the product, the plane and the volume of each injection point are decisions for the qualified professional, after assessment.

Which risks should be considered?

Volume concentrated in one point means greater local pressure. If the deposit lands inside or very close to a vessel, there is a risk of vascular occlusion, as with any injectable technique. Other risks are palpable nodules, irregularities and asymmetry when the volume is not well planned. Anyone using hyaluronic acid should have hyaluronidase available in the office.

This page defines the term and does not describe an injection technique, which is learned in supervised hands-on training.

In Harmy

The plan records the total volume per area in ml, not the way it is deposited. The projection shows the effect of the marked volume on the patient's photo.

Also called: bolus deposit, depot.