Application of Hyaluronic Acid Linear Stereoscopic Stack Volume Enhancement Injection Technique in Nasal Reshaping.

Abstract

Hyaluronic acid (HA) injection, traditionally used for non-surgical rhinoplasty, is often associated with adverse effects such as increased nasal dorsum width. This study introduces the linear stereoscopic stack volume enhancement (LSSVE) injection technique as a solution for patients with low-profile noses, aiming to improve the nasal dorsum dimension, prevent long-term nasal widening, and address related concerns. A retrospective analysis was conducted on the clinical registry data of patients treated at Shanghai Phiskin Clinic from December 2020 to June 2024, who received HA injections using the LSSVE technique. Each rhinoplasty patient received a personalized injection, with doses ranging from 0.59 to 1.03 mL, adjusted based on specific characteristics of their nose and forehead. The procedure utilized a 25G blunt cannula to administer HA between the nasal bone periosteum and fascial layer using the LSSVE technique. The primary endpoint was patient improvement assessed 6 months post-injection using the Global Aesthetic Improvement Scale (GAIS), evaluated by a blinded assessor. In addition, patient satisfaction and complications were assessed. A total of 189 patients (181 females and 28 males) were included in the study, all of whom received a single HA LSSVE injection. Six months post-injection, the GAIS improvement rate was 82.83%, with a patient satisfaction rate of 84.83%. The injection effect was maintained for 6 months without any nasal dorsum widening, and a significant increase in the nasofrontal angle was observed (P<0.001). No long-term complications were reported post-injection. The LSSVE injection technique demonstrated effectiveness in overcoming the limitations of traditional HA rhinoplasty and preventing long-term nasal dorsum widening.