Sforza Marcos, Martinez Nicole, Araujo Nathalia, de Mezerville Roberto, Castro Jose Andrés
Elective Internship in Plastic Surgery, Dolan Park Hospital, Birmingham, England, UK.
Industrial Designer and RDI Engineer at Establishment Labs, Alajuela, Costa Rica.
Aesthet Surg J Open Forum. 2020 Apr 13;2(2):ojaa014. doi: 10.1093/asjof/ojaa014. eCollection 2020 Jun.
Autologous fat transfer is a common technique to refine the contour of the breast after prosthetic augmentation or reconstruction, correcting remaining asymmetries by injecting previously harvested fat tissue with a cannula. Current procedures are often performed without visualization of the cannula at the delivery site and may require subsequent verification of the implant's integrity. The present paper aims to evaluate the safety of a new bulb tip cannula to be used during breast implant procedures for injecting fat adjacent to a breast implant that reduce the risk of damaging the implant. Two conventional cannulae and 3 bulb cannulae, which have an atraumatic distal tip, were tested in a simulated implant-puncture setting in 3 positions (at 0°, 45°, and 90° of incidence). A Tensile Tester (Instron, High Wycombe, UK) was used to apply force with each cannula device and record the amount of force applied in the attempt to penetrate the implants used, with shell layers having a variable thickness. No implant rupture was observed with the bulb tip cannulae regardless of size or the position in which the cannulae were pressed against the implants. The cannula opening was not impeded and tended to bend instead; 27% of the cases with the conventional lipo-cannulae caused an implant rupture. The bulb tip cannula could enhance the safety of the fat transfer procedure by ensuring no iatrogenic implant disruption and optimal delivery of the fat tissue.
自体脂肪移植是一种在假体隆胸或乳房重建后改善乳房外形的常用技术，通过使用套管注入先前采集的脂肪组织来纠正残留的不对称性。目前的手术操作通常在未可视化套管在注射部位的情况下进行，并且可能需要随后对植入物的完整性进行验证。本文旨在评估一种新型球头套管在乳房植入手术中用于在乳房植入物附近注射脂肪时的安全性，该套管可降低损坏植入物的风险。在模拟植入物穿刺环境中，在三个位置（入射角为0°、45°和90°）对两根传统套管和三根具有无创伤远端尖端的球头套管进行了测试。使用拉伸试验机（英斯特朗公司，英国海威科姆）对每个套管装置施加力，并记录在试图穿透所用植入物时施加的力的大小，植入物外壳层厚度可变。无论球头套管的尺寸或其按压植入物的位置如何，均未观察到植入物破裂。套管开口未受阻碍，而是倾向于弯曲；27%使用传统抽脂套管的情况导致植入物破裂。球头套管可通过确保无医源性植入物破坏和脂肪组织的最佳输送来提高脂肪移植手术的安全性。
