Correlation Between Body Mass Index and Anterolateral Thigh Flap Thickness: A Retrospective Study From a Single Center in China.

Jianxin Yin,Xingjun Qin,Lei Wang,Gongxin Yang,Ping Xiong

doi:10.3389/fsurg.2021.748799

Abstract

Background: During repair of oral and maxillofacial soft tissue defects, organ function is largely related to the amount of thickness of the flap. However, there are few studies on the influencing factors of the thickness of the flap. In this retrospective study, we aim to explore the correlation between body mass index (BMI) and anterolateral thigh (ALT) flap thickness by computed tomography (CT) and ultrasound and provide guidance for evaluating the ALT flap thickness before surgery.Methods: We selected three points A, B, and C on ALT flap and two skilled clinicians measured the thickness of these points. Age and gender as covariates and evaluated by the Chi-square analysis. Inter-group differences between the two BMI groups were examined by the student t test. Intra-group differences within each BMI group were tested by ANOVA. Linear regression analysis was performed to examine the relationship between BMI and ALT flap thickness.Results: One hundred sixty patients measured by CT were included in this study, and the ALT flap thickness measured by CT were 8.96 mm and 11.00 mm (P < 0.0001, t test) at point B in groups with BMI<24.0 and BMI≥24.0, respectively. The thicknesses at points A, B, and C were significantly correlated with the BMI (P < 0.001, correlation analysis, r = 0.462, 0.372, and 0.349 at the points A, B, and C, retrospectively, Pearson test).Conclusion: There was a significant correlation between the ALT flap thickness and BMI. A higher BMI was correlated with a thicker ALT flap.

Highlights

Repair and reconstruction of soft tissue defects have always been a difficult but important process during the oral and maxillofacial operation [1]
We aim to explore the correlation between body mass index (BMI) and anterolateral thigh (ALT) flap thickness by computed tomography (CT) and ultrasound and provide guidance for evaluating the ALT flap thickness before surgery
One hundred sixty patients measured by CT were included in this study, and the ALT flap thickness measured by CT were 8.96 mm and 11.00 mm (P < 0.0001, t test) at point B in groups with BMI < 24.0 and BMI ≥ 24.0, respectively

Summary

Introduction

Repair and reconstruction of soft tissue defects have always been a difficult but important process during the oral and maxillofacial operation [1]. The restoration of organ functions is largely directly related to the amount of tissue and thickness of the flap [2]. The anterolateral thigh (ALT) flap is the most commonly used flap to repair soft tissue defects in the oral and maxillofacial area due to its large tissue volume, long vascular pedicle, relatively simple preparation, and wide range of applications [2,3,4,5,6]. The function of the repaired defective tissue largely depends on the intra-operative selection of the ALT flap with appropriate thickness. During repair of oral and maxillofacial soft tissue defects, organ function is largely related to the amount of thickness of the flap. We aim to explore the correlation between body mass index (BMI) and anterolateral thigh (ALT) flap thickness by computed tomography (CT) and ultrasound and provide guidance for evaluating the ALT flap thickness before surgery

Objectives

Methods

Results

Conclusion