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Original Article

The AESTHETICS 2020; 1(1): 22-29

Published online April 30, 2020

© Korean Association For Laser Dermatology And Trichology

Analysis of Blood Aspiration Patterns during Pre-injection Tests of Injectable Fillers

Bong Cheol Kim, MD1, Gi Woong Hong, MD, PhD2, Seung Min Oh, MD, MMBA3, Fang Wen Tseng, MD4

1Isu Lamar Clinic, Seoul, Korea
2Samskin Plastic Surgery Clinic, Seoul, Korea
3ON Clinic, Seoul, Korea
4Milano Aesthetic Clinic, Taoyuan, Taiwan

Correspondence to: Fang Wen Tseng
Milano Aesthetic Clinic, Taoyuan 330, Taiwan

Received: March 26, 2020; Revised: April 10, 2020; Accepted: April 16, 2020

This is an open access article distributed under the terms of the Creative Commons Attribution Non- Commercial License ( licenses/by-nc/4.0) which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


Background and Objectives
Clinicians have yet to reach a consensus on whether blood aspiration tests are reliable when administering filler injections. Better understanding of the characteristics and patterns of blood aspiration tests for filler injections is important in reducing false negative results. In this study, we sought to outline the characteristics of blood aspiration tests for different types of fillers with different gauges of needles and cannulas.
Materials and Methods
Four biphasic hyaluronic acid fillers and ten monophasic hyaluronic acid fillers of four brands and two collagen stimulators were tested. Aspiration tests were performed with needles and cannulas of different gauges . The time before blood was seen in the needle hub and the vacuum space patterns generated were analyzed.
Different aspiration patterns were observed with different fillers, depending on the viscosity of the product and the sizes of the needle and cannula used.
When factors influencing aspiration are considered, including the characteristics of fillers and the size of injection tools, aspiration tests with proper maneuver can be helpful to increase injection safety.

Supplementary video file: This article contains supplementary material.

Keywords: Fillers, Aspiration, Complications, Prevention